JP7640282B2 - Colored curable resin composition - Google Patents

Description

The present invention relates to a colored curable resin composition, a color filter, a liquid crystal display device, and a method for producing a colored curable resin composition.

Color filters used in displays such as liquid crystal displays, electroluminescent displays, and plasma displays, and solid-state imaging devices such as CCD and CMOS sensors, are manufactured from colored curable resin compositions. Squarylium dyes are known as colorants used in such colored curable resin compositions (see, for example, Patent Document 1).

JP 2019-163233 A

However, in the above colored curable resin composition containing a squarylium dye, it was necessary to prevent fading (reduce ΔE*ab) after post-baking in the film formation process. Therefore, an object of the present invention is to provide a colored curable resin composition that can prevent fading of the cured product (reduce ΔE*ab). In addition, in a preferred embodiment of the present invention, an object of the present invention is to provide a colored curable resin composition that can improve one or both of the absorbance retention rate and contrast of the cured product in addition to preventing fading.

［式（ＡＩ）中、
Ｒ¹～Ｒ⁴は、それぞれ独立に、水素原子、ハロゲン原子、ヒドロキシ基、又は置換基を有していてもよい炭素数１～２０の１価の飽和炭化水素基を表す。該１価の飽和炭化水素基を構成するメチレン基は、－Ｏ－または－Ｓ－で置換されていてもよい。
Ｒ⁵～Ｒ⁸は、それぞれ独立に、水素原子またはヒドロキシ基を表す。
Ａｒ¹及びＡｒ²は、それぞれ独立に、式（ｉ）で表される基を表す。

［式（ｉ）中、
Ｒ¹²は、ヒドロキシ基もしくはカルボキシ基を有していてもよい炭素数１～２０の１価の飽和炭化水素基またはヒドロキシ基もしくはカルボキシ基を表し、ｍは０～５の整数を表す。該１価の飽和炭化水素基を構成するメチレン基は、－Ｏ－または－Ｓ－で置換されていてもよい。ｍが２以上のとき、複数のＲ¹²は、それぞれ同一であっても異なっていてもよい。＊は、窒素原子との結合手を表す。］
Ｒ⁹及びＲ¹⁰は、それぞれ独立に、置換基を有していてもよい炭素数１～２０の１価の飽和炭化水素基または式（ｉ）で表される基を表す。該１価の飽和炭化水素基を構成するメチレン基は、－Ｏ－または－Ｓ－で置換されていてもよい。］
［３］ 前記スクアリリウム染料が、式（ＡＩＩ）で表される化合物である［１］又は［２］に記載の着色硬化性樹脂組成物。

［式（ＡＩＩ）中、
Ｒ¹～Ｒ⁴は、それぞれ独立に、水素原子、ハロゲン原子、ヒドロキシ基、又は置換基を有していてもよい炭素数１～２０の１価の飽和炭化水素基を表す。該１価の飽和炭化水素基を構成するメチレン基は、－Ｏ－または－Ｓ－で置換されていてもよい。
Ｒ⁵～Ｒ⁸は、それぞれ独立に、水素原子またはヒドロキシ基を表す。
Ａｒ¹及びＡｒ²は、それぞれ独立に、式（ｉ）で表される基を表す。

［式（ｉ）中、
Ｒ¹²は、ヒドロキシ基もしくはカルボキシ基を有していてもよい炭素数１～２０の１価の飽和炭化水素基またはヒドロキシ基もしくはカルボキシ基を表し、ｍは０～５の整数を表す。該１価の飽和炭化水素基を構成するメチレン基は、－Ｏ－または－Ｓ－で置換されていてもよい。ｍが２以上のとき、複数のＲ¹²は、それぞれ同一であっても異なっていてもよい。＊は、窒素原子との結合手を表す。］
Ｒ¹³及びＲ¹⁴は、それぞれ独立に、ヒドロキシ基又はカルボキシ基を有している炭素数１～２０の１価の飽和炭化水素基を表し、該１価の飽和炭化水素基を構成するメチレン基は、－Ｏ－または－Ｓ－で置換されていてもよい。］
［４］ 前記分散剤が、３級アミノ基又は含窒素ヘテロ環の塩基性官能基を有する［１］～［３］のいずれかに記載に着色硬化性樹脂組成物。
［５］ 前記分散剤の含有量が、前記着色剤１００質量部に対して０．１質量部以上５０質量部以下である［１］～［４］のいずれかに記載の着色硬化性樹脂組成物。
［６］ 前記着色剤が前記分散剤により溶剤中に分散されてなる分散液を含んでなる［１］～［５］のいずれかに記載の着色硬化性樹脂組成物。
［７］［１］～［６］のいずれかに記載の着色硬化性樹脂組成物から形成されるカラーフィルタ。
［８］ ［７］に記載のカラーフィルタを含む液晶表示装置。
［９］ 着色剤が分散剤により溶剤中に分散されてなる分散液を得る工程、及び
前記分散液に、樹脂、重合性化合物、及び重合開始剤を添加する工程を含み、
前記着色剤が、可視光領域に極大吸収を有するスクアリリウム染料を含み、
前記分散剤のアミン価が０ｍｇＫＯＨ／ｇ超３０ｍｇＫＯＨ／ｇ以下である着色硬化性樹脂組成物の製造方法。 That is, the gist of the present invention is as follows.
[1] A composition comprising a colorant, a dispersant, a resin, a polymerizable compound, a polymerization initiator, and a solvent;
the colorant comprises a squarylium dye having a maximum absorption in the visible light region;
The colored curable resin composition, wherein the amine value of the dispersant is more than 0 mgKOH/g and not more than 30 mgKOH/g.
[2] The colored curable resin composition according to [1], wherein the squarylium dye is a compound represented by formula (AI):

[In formula (AI),
R ¹ to R ⁴ each independently represent a hydrogen atom, a halogen atom, a hydroxyl group, or a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms which may have a substituent. A methylene group constituting the monovalent saturated hydrocarbon group may be substituted with -O- or -S-.
R ⁵ to R ⁸ each independently represent a hydrogen atom or a hydroxy group.
Ar ¹ and Ar ² each independently represent a group represented by formula (i).

[In formula (i),
R ¹² represents a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms which may have a hydroxyl group or a carboxyl group, and m represents an integer of 0 to 5. A methylene group constituting the monovalent saturated hydrocarbon group may be substituted with -O- or -S-. When m is 2 or more, the multiple R ¹² 's may be the same or different. * represents a bond to a nitrogen atom.]
R ⁹ and R ¹⁰ each independently represent a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms which may have a substituent, or a group represented by formula (i). A methylene group constituting the monovalent saturated hydrocarbon group may be substituted with -O- or -S-.]
[3] The colored curable resin composition according to [1] or [2], wherein the squarylium dye is a compound represented by formula (AII):

[In formula (AII),
R ¹ to R ⁴ each independently represent a hydrogen atom, a halogen atom, a hydroxyl group, or a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms which may have a substituent. A methylene group constituting the monovalent saturated hydrocarbon group may be substituted with -O- or -S-.
R ⁵ to R ⁸ each independently represent a hydrogen atom or a hydroxy group.
Ar ¹ and Ar ² each independently represent a group represented by formula (i).

[In formula (i),
R ¹² represents a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms which may have a hydroxyl group or a carboxyl group, and m represents an integer of 0 to 5. A methylene group constituting the monovalent saturated hydrocarbon group may be substituted with -O- or -S-. When m is 2 or more, the multiple R ¹² 's may be the same or different. * represents a bond to a nitrogen atom.]
R ¹³ and R ¹⁴ each independently represent a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms and having a hydroxyl group or a carboxyl group, and a methylene group constituting the monovalent saturated hydrocarbon group may be substituted with -O- or -S-.]
[4] The colored curable resin composition according to any one of [1] to [3], wherein the dispersant has a tertiary amino group or a nitrogen-containing heterocyclic basic functional group.
[5] The colored curable resin composition according to any one of [1] to [4], wherein the content of the dispersant is 0.1 parts by mass or more and 50 parts by mass or less relative to 100 parts by mass of the colorant.
[6] The colored curable resin composition according to any one of [1] to [5], comprising a dispersion in which the colorant is dispersed in a solvent by the dispersant.
[7] A color filter formed from the colored curable resin composition according to any one of [1] to [6].
[8] A liquid crystal display device comprising the color filter according to [7].
[9] A method for producing a colorant dispersion in a solvent using a dispersant, comprising:
the colorant comprises a squarylium dye having a maximum absorption in the visible light region;
The method for producing a colored curable resin composition, wherein the amine value of the dispersant is more than 0 mgKOH/g and not more than 30 mgKOH/g.

According to the present invention, it is possible to provide a colored curable resin composition that can prevent discoloration of the cured product. In addition, according to a preferred embodiment of the present invention, it is also possible to provide a colored curable resin composition that not only prevents discoloration, but also improves one or both of the absorbance retention rate and contrast of the cured product.

<Colored curable resin composition>
The colored curable resin composition of the present invention contains a colorant (hereinafter, may be referred to as colorant (A)), a dispersant (hereinafter, may be referred to as dispersant (P)), a resin (hereinafter, may be referred to as resin (B)), a polymerizable compound (hereinafter, may be referred to as polymerizable compound (C)), a polymerization initiator (hereinafter, may be referred to as polymerization initiator (D)), and a solvent (hereinafter, may be referred to as solvent (E)), wherein the colorant (A) contains a squarylium dye having an absorption maximum in the visible light region, and the amine value of the dispersant (P) is more than 0 mgKOH/g and not more than 30 mgKOH/g.
In this specification, the compounds exemplified as each component may be used alone or in combination, unless otherwise specified.

<Colorant (A)>
The colorant (A) contains a squarylium dye having a maximum absorption in the visible light region. The squarylium dye is preferably a compound having a maximum absorption at 380 nm or more (preferably 400 nm or more) and less than 700 nm (preferably 650 nm or less).

The squarylium dye is not particularly limited as long as it is a compound that has a maximum absorption in the visible light region, and any known squarylium dye can be used, but it is preferably a compound represented by formula (AI).

［式（ｉ）中、
Ｒ¹²は、ヒドロキシ基もしくはカルボキシ基を有していてもよい炭素数１～２０の１価の飽和炭化水素基またはヒドロキシ基もしくはカルボキシ基を表し、ｍは０～５の整数を表す。該１価の飽和炭化水素基を構成するメチレン基は、－Ｏ－または－Ｓ－で置換されていてもよい。ｍが２以上のとき、複数のＲ¹²は、それぞれ同一であっても異なっていてもよい。＊は、窒素原子との結合手を表す。］
Ｒ⁹及びＲ¹⁰は、それぞれ独立に、置換基を有していてもよい炭素数１～２０の１価の飽和炭化水素基または式（ｉ）で表される基を表す。該１価の飽和炭化水素基を構成するメチレン基は、－Ｏ－または－Ｓ－で置換されていてもよい。］ [In formula (AI),
R ¹ to R ⁴ each independently represent a hydrogen atom, a halogen atom, a hydroxyl group, or a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms which may have a substituent. A methylene group constituting the monovalent saturated hydrocarbon group may be substituted with -O- or -S-.
R ⁵ to R ⁸ each independently represent a hydrogen atom or a hydroxy group.
Ar ¹ and Ar ² each independently represent a group represented by formula (i).

[In formula (i),
R ¹² represents a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms which may have a hydroxyl group or a carboxyl group, and m represents an integer of 0 to 5. A methylene group constituting the monovalent saturated hydrocarbon group may be substituted with -O- or -S-. When m is 2 or more, the multiple R ¹² 's may be the same or different. * represents a bond to a nitrogen atom.]
R ⁹ and R ¹⁰ each independently represent a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms which may have a substituent, or a group represented by formula (i). A methylene group constituting the monovalent saturated hydrocarbon group may be substituted with -O- or -S-.]

The halogen atom represented by R ¹ to R ⁴ includes a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.

Examples of the monovalent saturated hydrocarbon groups having 1 to 20 carbon atoms represented by R ¹ to R ⁴ , R ⁹ , R ¹⁰ , and R ¹² include linear alkyl groups having 1 to 20 carbon atoms, such as methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, dodecyl, hexadecyl, and icosyl groups; branched alkyl groups having 3 to 20 carbon atoms, such as isopropyl, isobutyl, sec-butyl, tert-butyl, isopentyl, neopentyl, and 2-ethylhexyl groups; and alicyclic saturated hydrocarbon groups having 3 to 20 carbon atoms, such as cyclopropyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, tricyclodecyl, and adamantyl groups.

Examples of the substituents on these saturated hydrocarbon groups include halogen atoms such as fluorine, chlorine, and iodine atoms, hydroxy groups, carboxy groups, -NR ^a R ^b (R ^a and R ^b each independently represent a hydrogen atom or an alkyl group having 1 to 20 carbon atoms), nitro groups, and alkoxycarbonyl groups having 1 to 10 carbon atoms such as methoxycarbonyl and ethoxycarbonyl groups. Examples of the monovalent saturated hydrocarbon groups having 1 to 20 carbon atoms and having a substituent include groups represented by the following formula: In the following formula, * represents a bond.

Examples of groups in which the methylene groups constituting these saturated hydrocarbon groups are replaced with -O- or -S- include groups represented by the following formulas. In the following formulas, * represents a bond.

The monovalent saturated hydrocarbon group having 1 to 20 carbon atoms represented by R ¹² may be a monovalent unsaturated hydrocarbon group having 2 to 20 carbon atoms. Examples of the monovalent unsaturated hydrocarbon group having 2 to 20 carbon atoms represented by R ¹² include a vinyl group, a propenyl group, a butenyl group, a pentenyl group, a hexenyl group, a heptenyl group, an octenyl group, a nonenyl group, and a decenyl group.

R ¹ to R ⁴ are preferably a hydrogen atom, a hydroxy group, or an alkyl group having 1 to 4 carbon atoms, more preferably a hydrogen atom, a hydroxy group, or a methyl group, and even more preferably a hydrogen atom.

It is preferable that at least one of ^R5 to ^R8 is a hydroxy group, it is more preferable that at least one of ^R5 and ^R6 is a hydroxy group and at least one of ^R7 and ^R8 is a hydroxy group, it is even more preferable that one of ^R5 and ^R6 is a hydroxy group and one of ^R7 and ^R8 is a hydroxy group.

As ^R9 and ^R10 , a linear alkyl group having 1 to 20 carbon atoms which may have a substituent, and a branched alkyl group having 3 to 20 carbon atoms which may have a substituent are preferable, a linear alkyl group having 1 to 10 carbon atoms which may have a substituent, and a branched alkyl group having 3 to 10 carbon atoms which may have a substituent are more preferable, a linear alkyl group having 1 to 5 carbon atoms which has a hydroxy group at the terminal, a linear alkyl group having 1 to 5 carbon atoms which has a carboxy group at the terminal, and a branched alkyl group having 3 to 10 carbon atoms are even more preferable, and a linear alkyl group having 1 to 5 carbon atoms which has a hydroxy group at the terminal, and a linear alkyl group having 1 to 5 carbon atoms which has a carboxy group at the terminal are even more preferable.

R ¹² is preferably a monovalent saturated hydrocarbon group having 1 to 10 carbon atoms which may have a hydroxy group or a carboxy group, more preferably a linear alkyl group having 1 to 5 carbon atoms which may have a hydroxy group or a carboxy group, and even more preferably a linear alkyl group having 1 to 5 carbon atoms, or a linear alkyl group having 1 to 5 carbon atoms which has a hydroxy group or a carboxy group.

m is preferably 1 to 5, more preferably 1 to 3, and even more preferably 2 or 3.

Ar ¹ and Ar ² are preferably groups represented by formula (ii).

[In the formula (ii),
R ¹⁵ represents a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms having a hydroxyl group or a carboxyl group, or a hydroxyl group or a carboxyl group, and p represents an integer of 0 to 5. A methylene group constituting the monovalent saturated hydrocarbon group may be substituted with -O- or -S-. When p is 2 or more, multiple R ¹⁵ 's may be the same or different.
R ¹⁶ represents a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms which may have a substituent, or a monovalent unsaturated hydrocarbon group having 2 to 20 carbon atoms which may have a substituent, and q represents an integer of 0 to 5, where p+q represents an integer of 0 to 5. A methylene group constituting the monovalent saturated hydrocarbon group may be substituted with -O- or -S-. When q is 2 or greater, multiple R ¹⁶ may be the same or different.
* represents a bond to a nitrogen atom.

Examples of the monovalent saturated hydrocarbon group having 1 to 20 carbon atoms represented by R ¹⁵ include those exemplified above as the monovalent saturated hydrocarbon group having 1 to 20 carbon atoms. Among them, a linear alkyl group having 1 to 20 carbon atoms is preferred, a linear alkyl group having 1 to 10 carbon atoms is more preferred, and a linear alkyl group having 1 to 5 carbon atoms is even more preferred.

The hydroxyl or carboxyl group of the monovalent saturated hydrocarbon group having 1 to 20 carbon atoms is preferably bonded to the molecular chain end of the saturated hydrocarbon group.

Examples of the monovalent saturated hydrocarbon group having 1 to 20 carbon atoms and having a hydroxyl group or a carboxyl group include groups represented by the following formula: In the following formula, * represents a bond.

R ¹⁵ is preferably a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms and having a hydroxy group. It is also preferable that at least one of the methylene groups constituting the monovalent saturated hydrocarbon group having 1 to 20 carbon atoms represented by R ¹⁵ is substituted with -O-. Examples of groups in which at least one of the methylene groups constituting the monovalent saturated hydrocarbon group having 1 to 20 carbon atoms represented by R ¹⁵ is substituted with -O- include groups represented by the following formula. In the following formula, * represents a bond.

Examples of the monovalent saturated hydrocarbon group having 1 to 20 carbon atoms which may have a substituent and the monovalent unsaturated hydrocarbon group having 2 to 20 carbon atoms which may have a substituent represented by R ¹⁶ include the above-mentioned examples of the monovalent saturated hydrocarbon group having 1 to 20 carbon atoms which may have a substituent and the monovalent unsaturated hydrocarbon group having 2 to 20 carbon atoms which may have a substituent.
Examples of the substituent on the unsaturated hydrocarbon group include halogen atoms such as fluorine atom, chlorine atom, and iodine atom; hydroxy group; carboxy group; -NR ^c R ^d (R ^c and R ^d are each independently a hydrogen atom or an alkyl group having 1 to 20 carbon atoms); nitro group; alkoxy groups having 1 to 10 carbon atoms such as methoxy group and ethoxy group; alkoxycarbonyl groups having 1 to 10 carbon atoms such as methoxycarbonyl group and ethoxycarbonyl group; and the like.
Among these, a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms which may have a substituent is preferred, a linear alkyl group having 1 to 5 carbon atoms which may have a substituent is more preferred, a linear alkyl group having 1 to 3 carbon atoms is even more preferred, and a methyl group is particularly preferred.

p is preferably an integer from 0 to 3, more preferably an integer from 0 to 1, and even more preferably 1.

q is preferably an integer from 1 to 3, more preferably an integer from 1 to 2, and even more preferably 2.

It is particularly preferred that p is 0 or 1 and q is 2.

Ar ¹ and Ar ² may be the same or different, and are preferably the same.

Among the compounds represented by formula (AI), a compound represented by formula (AII) is more preferable. When the squarylium dye is a compound represented by formula (AII), the decrease in maximum absorption after post-baking can be further suppressed, and the fading change before and after post-baking can also be further suppressed.

[In formula (AII),
R ¹ to R ⁸ , Ar ¹ and Ar ² are the same as above.
R ¹³ and R ¹⁴ each independently represent a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms and having a hydroxyl group or a carboxyl group, and a methylene group constituting the monovalent saturated hydrocarbon group may be substituted with -O- or -S-.]

Examples of the monovalent saturated hydrocarbon group having 1 to 20 carbon atoms represented by R ¹³ and R ¹⁴ include those exemplified above as the monovalent saturated hydrocarbon group having 1 to 20 carbon atoms. Among them, a linear alkyl group having 1 to 20 carbon atoms is preferred, a linear alkyl group having 1 to 10 carbon atoms is more preferred, and a linear alkyl group having 1 to 5 carbon atoms is even more preferred.

The hydroxyl or carboxyl group of the monovalent saturated hydrocarbon group having 1 to 20 carbon atoms is preferably bonded to the molecular chain end of the saturated hydrocarbon group.

Examples of the monovalent saturated hydrocarbon group having 1 to 20 carbon atoms and having a hydroxyl group or a carboxyl group include groups represented by the following formula: In the following formula, * represents a bond.

Preferred embodiments of R ¹ to R ⁸ , Ar ¹ and Ar ² in formula (AII) are the same as those described above.

The squarylium dye (preferably a compound represented by formula (AI), more preferably a compound represented by formula (AII)) preferably has one or more hydroxy groups, more preferably has two or more hydroxy groups, even more preferably has two or more hydroxy groups and two or more carboxy groups, and even more preferably has three or more hydroxy groups.

Examples of the compound represented by formula (AI) include compounds represented by formulae (AI-1) to (AI-60) shown in Tables 1 and 2, and among them, from the viewpoint of availability of raw materials, compounds represented by formulae (AI-1) to (AI-20) are preferred.
The compound represented by formula (AI) is more preferably a compound represented by formula (AI-1) to formula (AI-5) or formula (AI-11) to formula (AI-20).
More preferably, it is a compound represented by formula (AI-11) to formula (AI-20),
It is even more preferable that the compound is represented by formula (AI-15) or formula (AI-16).

In Tables 1 and 2, x-1 to x-4 represent groups represented by the following formulae (* represents a bond).

In Tables 1 and 2, y-1 to y-5 represent groups represented by the following formulae (* represents a bond).

The compound represented by formula (AI) can be produced, for example, by reacting a compound represented by formula (pt1), a compound represented by formula (pt2), and a compound represented by formula (pt3). In this reaction, the total amount of the compound represented by formula (pt1) and the compound represented by formula (pt2) used is preferably 1.5 to 2.5 mol per mol of the compound represented by formula (pt3).

In the formula, R ¹ to R ¹⁰ , Ar ¹ and Ar ² each have the same meaning as defined above.

The reaction temperature is preferably 30°C to 180°C, more preferably 80°C to 140°C. The reaction time is preferably 1 hour to 12 hours, more preferably 3 hours to 8 hours.

In terms of yield, the reaction is preferably carried out in an organic solvent. Examples of organic solvents include hydrocarbon solvents such as toluene and xylene; halogenated hydrocarbon solvents such as chlorobenzene, dichlorobenzene, and chloroform; alcohol solvents such as methanol, ethanol, isopropanol, and butanol; nitrohydrocarbon solvents such as nitrobenzene; ketone solvents such as methyl isobutyl ketone; and amide solvents such as 1-methyl-2-pyrrolidone. These may be used in combination. Of these, a mixed solvent of butanol and toluene is preferred. The amount of organic solvent used is preferably 10 parts by mass or more and 200 parts by mass or less, more preferably 30 parts by mass or more and 150 parts by mass or less, per part by mass of the total of the compound represented by formula (pt1) and the compound represented by formula (pt2).

There is no particular limitation on the method for extracting the target compound represented by formula (AI) from the reaction mixture, and various known methods can be used. For example, the target compound can be obtained by distilling off the solvent from the reaction mixture, or by cooling the reaction mixture after completion of the reaction and filtering out the precipitated crystals. The filtered crystals are preferably washed with water and then dried. If necessary, they may be further purified by known methods such as column chromatography or recrystallization.

The content of the squarylium dye in the colorant (A) is preferably 50% by mass or more, more preferably 70% by mass or more, even more preferably 80% by mass or more, and particularly preferably 90% by mass or more, and may be 95% by mass or more, or may be 100% by mass.

The colorant (A) may contain, in addition to the squarylium dye, a colorant other than the squarylium dye, and the colorant other than the squarylium dye may be either a dye (hereinafter, sometimes referred to as dye (A1)) or a pigment (hereinafter, sometimes referred to as pigment (A2)). The colorant other than the squarylium dye may contain one or both of these dyes (A1) and pigments (A2).

As the dye (A1), there is no particular limitation, and any known dye can be used as long as it does not include the squarylium dye. Examples of the dye include solvent dyes, acid dyes, direct dyes, mordant dyes, etc. Examples of the dye include compounds classified as having a hue other than pigments in the Color Index (published by The Society of Dyers and Colourists) and known dyes described in Dyeing Notes (Shikisensha). In addition, examples of the dye that can be used according to chemical structure include azo dyes, cyanine dyes, triphenylmethane dyes, xanthene dyes, phthalocyanine dyes, anthraquinone dyes, naphthoquinone dyes, quinoneimine dyes, methine dyes, azomethine dyes, acridine dyes, styryl dyes, coumarin dyes, quinoline dyes, and nitro dyes. Of these, organic solvent-soluble dyes are preferred.

Specifically, C.I. Solvent Yellow 4 (hereinafter, the description of C.I. Solvent Yellow will be omitted and only the number will be described), 14, 15, 23, 24, 38, 62, 63, 68, 82, 94, 98, 99, 117, 162, 163, 167, 189;
C.I. Solvent Red 45, 49, 111, 125, 130, 143, 145, 146, 150, 151, 155, 168, 169, 172, 175, 181, 207, 218, 222, 227, 230, 245, 247;
C.I. Solvent Orange 2, 7, 11, 15, 26, 56, 77, 86;
C.I. Solvent Violet 11, 13, 14, 26, 31, 36, 37, 38, 45, 47, 48, 51, 59, 60;
C.I. Solvent Blue 4, 5, 14, 18, 35, 36, 37, 45, 58, 59, 59:1, 63, 67, 68, 69, 70, 78, 79, 83, 90, 94, 97, 98, 100, 101, 102, 104, 105, 111, 112, 122, 128, 132, 136, 139;
C.I. Solvent dyes such as C.I. Solvent Green 1, 3, 4, 5, 7, 28, 29, 32, 33, 34, 35,
C.I. Acid Yellow 1, 3, 7, 9, 11, 17, 23, 25, 29, 34, 36, 38, 40, 42, 54, 65, 72, 73, 76, 79, 98, 99, 111, 112, 113, 114, 116, 119, 123, 128, 134, 135, 138, 139, 140, 144, 150, 155, 1 57, 160, 161, 163, 168, 169, 172, 177, 178, 179, 184, 190, 193, 196, 197, 199, 202, 203, 204, 205, 207, 212, 214, 220, 221, 228, 230, 232, 235, 238, 240, 242, 243, 251;
C.I. Acid Red 1, 4, 8, 14, 17, 18, 26, 27, 29, 31, 33, 34, 35, 37, 40, 42, 44, 50, 51, 52, 57, 66, 73, 76, 80, 87, 88, 91, 92, 94, 95, 97, 98, 103, 106, 111, 114, 129, 133, 134, 138, 143, 145, 150, 151, 155, 158, 160, 172, 176, 18 2, 183, 195, 198, 206, 211, 215, 216, 217, 227, 228, 249, 252, 257, 258, 260, 261, 266, 268, 270, 274, 277, 2 80, 281, 289, 308, 312, 315, 316, 339, 341, 345, 346, 349, 382, 383, 388, 394, 401, 412, 417, 418, 422, 426;
C.I. Acid Orange 6, 7, 8, 10, 12, 26, 50, 51, 52, 56, 62, 63, 64, 74, 75, 94, 95, 107, 108, 169, 173;
C.I. Acid Violet 6B, 7, 9, 15, 16, 17, 19, 21, 23, 24, 25, 30, 34, 38, 49, 72, 102;
C.I. Acid Blue 1, 3, 5, 7, 9, 11, 13, 15, 17, 18, 22, 23, 24, 25, 26, 27, 29, 34, 38, 40, 41, 42, 43, 45, 48, 51, 54, 59, 60, 62, 70, 72, 74, 75, 78, 80, 82, 83, 86, 87, 88, 90, 90:1, 91, 92, 93, 93:1, 96, 99, 100, 102, 103, 104, 108, 109, 110, 112, 113, 117, 119, 120, 12 3, 126, 127, 129, 130, 131, 138, 140, 142, 143, 147, 150, 151, 154, 158, 161, 166, 167, 168, 170, 171, 175, 182, 183, 184, 187, 192, 199, 203, 204, 205, 210, 213, 229, 234, 236, 242, 243, 256, 259, 267, 269, 278, 280, 285, 290, 296, 315, 324:1, 335, 340;
C.I. Acid dyes such as C.I. Acid Green 1, 3, 5, 6, 7, 8, 9, 11, 13, 14, 15, 16, 22, 25, 27, 28, 41, 50, 50:1, 58, 63, 65, 80, 104, 105, 106, 109,
C.I. Direct Yellow 2, 33, 34, 35, 38, 39, 43, 47, 50, 54, 58, 68, 69, 70, 71, 86, 93, 94, 95, 98, 102, 108, 109, 129, 136, 138, 141;
C.I. Direct Red 79, 82, 83, 84, 91, 92, 96, 97, 98, 99, 105, 106, 107, 172, 173, 176, 177, 179, 181, 182, 184, 204, 207, 211, 213, 218, 220, 221, 222, 232, 233, 234, 241, 243, 246, 250;
C.I. Direct Orange 26, 34, 39, 41, 46, 50, 52, 56, 57, 61, 64, 65, 68, 70, 96, 97, 106, 107;
C.I. Direct Violet 47, 52, 54, 59, 60, 65, 66, 79, 80, 81, 82, 84, 89, 90, 93, 95, 96, 103, 104;
C.I. Direct Blue 1, 2, 3, 6, 8, 15, 22, 25, 28, 29, 40, 41, 42, 47, 52, 55, 57, 71, 76, 77, 78, 80, 81, 84, 85, 86, 90, 93, 94, 95, 97, 98, 99, 100, 101, 106, 107, 108, 109, 113, 114, 115, 117, 119, 120, 137, 149, 150, 153, 155, 156, 158, 159, 160, 161, 162, 163, 164, 165, 166, 1 67, 168, 170, 171, 172, 173, 188, 189, 190, 192, 193, 194, 195, 196, 198, 199, 200, 201, 202, 203, 207, 209, 210, 212, 213, 214, 22 2, 225, 226, 228, 229, 236, 237, 238, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 256, 257, 259, 260, 268, 274, 275, 293;
C.I. Direct dyes such as C.I. Direct Green 25, 27, 31, 32, 34, 37, 63, 65, 66, 67, 68, 69, 72, 77, 79, 82,
C.I. Disperse Yellow 51, 54, 76;
C.I. Disperse Violet 26, 27;
C.I. Disperse dyes such as C.I. Disperse Blue 1, 14, 56, 60, etc.
C.I. Basic Red 1, 10;
C.I. Basic Blue 1, 3, 5, 7, 9, 19, 21, 22, 24, 25, 26, 28, 29, 40, 41, 45, 47, 54, 58, 59, 60, 64, 65, 66, 67, 68, 81, 83, 88, 89;
C.I. Basic Violet 2;
C.I. Basic Red 9;
C.I. Basic dyes such as C.I. Basic Green 1,
C.I. Reactive Yellow 2,76,116;
C.I. Reactive Orange 16;
C.I. Reactive dyes such as C.I. Reactive Red 36,
C.I. Mordant Yellow 5, 8, 10, 16, 20, 26, 30, 31, 33, 42, 43, 45, 56, 61, 62, 65;
C.I. Mordant Red 1, 2, 3, 4, 9, 11, 12, 14, 17, 18, 19, 22, 23, 24, 25, 26, 27, 29, 30, 32, 33, 36, 37, 38, 39, 41, 42, 43, 45, 46, 48, 52, 53, 56, 62, 63, 71, 74, 76, 78, 85, 86, 88, 90, 94, 95;
C.I. Mordant Orange 3, 4, 5, 8, 12, 13, 14, 20, 21, 23, 24, 28, 29, 32, 34, 35, 36, 37, 42, 43, 47, 48;
C.I. Mordant Violet 1, 1:1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 14, 15, 16, 17, 18, 19, 21, 22, 23, 24, 27, 28, 30, 31, 32, 33, 36, 37, 39, 40, 41, 44, 45, 47, 48, 49, 53, 58;
C.I. Mordant Blue 1, 2, 3, 7, 8, 9, 12, 13, 15, 16, 19, 20, 21, 22, 23, 24, 26, 30, 31, 32, 39, 40, 41, 43, 44, 48, 49, 53, 61, 74, 77, 83, 84;
C.I. Mordant dyes such as C.I. Mordant Green 1, 3, 4, 5, 10, 13, 15, 19, 21, 23, 26, 29, 31, 33, 34, 35, 41, 43, 53,
C.I. Vat dyes such as C.I. Vat Green 1 and the like.
These dyes may be appropriately selected according to the optical spectrum of the desired color filter.

The pigment (A2) is not particularly limited and any known pigment can be used, and examples thereof include pigments classified as pigments in the Color Index (published by The Society of Dyers and Colourists).
Examples of pigments include yellow pigments such as C.I. Pigment Yellow 1, 3, 12, 13, 14, 15, 16, 17, 20, 24, 31, 53, 83, 86, 93, 94, 109, 110, 117, 125, 128, 137, 138, 139, 147, 148, 150, 153, 154, 166, 173, 194, and 214;
Orange pigments such as C.I. Pigment Orange 13, 31, 36, 38, 40, 42, 43, 51, 55, 59, 61, 64, 65, 71, 73;
red pigments such as C.I. Pigment Red 9, 97, 105, 122, 123, 144, 149, 166, 168, 176, 177, 180, 192, 209, 215, 216, 224, 242, 254, 255, 264, 265;
blue pigments such as C.I. Pigment Blue 15:6, 60;
Violet pigments such as C.I. Pigment Violet 1, 19, 23, 29, 32, 36, 38;
green pigments such as C.I. Pigment Green 7, 36, 58;
Brown pigments such as C.I. Pigment Brown 23 and 25;
Examples of the black pigment include black pigments such as C.I. Pigment Black 1 and 7.

The pigment may be subjected, as necessary, to a rosin treatment, a surface treatment using a pigment derivative into which an acidic group or a basic group has been introduced, or the like, a grafting treatment onto the pigment surface using a polymer compound or the like, a particle size reduction treatment using a sulfuric acid atomization method or the like, a washing treatment using an organic solvent or water for removing impurities, a removal treatment of ionic impurities using an ion exchange method or the like, or the like.
The pigment preferably has a uniform particle size. By carrying out a dispersion treatment in the presence of a pigment dispersant, it is possible to obtain a pigment dispersion in which the pigment is uniformly dispersed in the solution.

Examples of the pigment dispersant include cationic, anionic, nonionic, amphoteric, polyester, polyamine, and acrylic surfactants. These pigment dispersants may be used alone or in combination of two or more. Examples of the pigment dispersant include KP (manufactured by Shin-Etsu Chemical Co., Ltd.), FLOWRENE (manufactured by Kyoeisha Chemical Co., Ltd.), Solsperse (manufactured by Lubrizol Corporation), EFKA (manufactured by CIBA), AJISPER (manufactured by Ajinomoto Fine-Techno Co., Ltd.), and Disperbyk (manufactured by BYK-Chemie Co., Ltd.). The pigment dispersant may be contained in the colored curable resin composition as the same component as the dispersant (P) described later, or may be contained as a different component.
When a pigment dispersant is used, the amount thereof is preferably 1% by mass or more and 100% by mass or less, more preferably 5% by mass or more and 50% by mass or less, based on the total amount of the pigment (A2). When the amount of the pigment dispersant used is within the above range, a pigment dispersion in a uniformly dispersed state tends to be obtained.

The content of colorant (A) in the colored curable resin composition is preferably 0.1% by mass or more and 70% by mass or less, more preferably 0.5% by mass or more and 60% by mass or less, and even more preferably 1% by mass or more and 50% by mass or less, based on the total amount of solids. When the content of colorant (A) is within the above range, the color density when made into a color filter is sufficient, and the composition can contain the necessary amounts of resin (B) and polymerizable compound (C), so that a pattern with sufficient mechanical strength can be formed.

Here, the "total amount of solids" in this specification refers to the amount obtained by subtracting the amount of solvent from the total amount of the colored curable resin composition. The total amount of solids and the amount of each component relative to the total amount of solids can be measured by known analytical means such as liquid chromatography or gas chromatography.

<Dispersant (P)>
The dispersant (P) is not particularly limited as long as it is used to disperse the colorant, but has an amine value of more than 0 mgKOH/g and not more than 30 mgKOH/g, preferably 0.5 mgKOH/g to 25 mgKOH/g, more preferably 1 mgKOH/g to 15 mgKOH/g, and even more preferably 10 mgKOH/g or less. In the present invention, when a colored curable resin composition is prepared by mixing or dispersing a dispersant having an amine value of 0, foreign matter may be formed in the coating film using the colored curable resin composition, making it impossible to prepare an appropriate coating film. In addition, in the present invention, when a colored curable resin composition is prepared by mixing or dispersing a dispersant having an amine value of more than 30 mgKOH/g, the heat resistance of the coating film using the colored curable resin composition may be insufficient. Here, the term "colored curable resin composition prepared by mixing or dispersing a dispersant" refers to a colored curable resin composition in which a dispersant is mixed or dispersed in advance in a colorant, a solvent, or the like to form a dispersion and then mixed with other components, or a colored curable resin composition in which a dispersant is directly mixed with other components.

The dispersant (P) may, for example, be a polymer dispersant.
The dispersant (P) is a component different from the resin (B) described below, and may differ in amine value and/or acid value.

Examples of the polymer dispersant include an acrylic dispersant and a urethane dispersant.
The acrylic dispersant may, for example, be an acrylic block copolymer. As the acrylic block copolymer, it is preferable to use a block copolymer having a colorant adsorption block which contains a basic group as a colorant adsorption group (also called a dye adsorption group), a colorant adsorption block which further contains an acid group as a colorant adsorption group, and a block which does not contain a colorant adsorption group.
The colorant adsorption block further containing an acid group in addition to a basic group as the colorant adsorption group can be formed by using a monomer having a basic group together with a monomer having an acidic group.

The monomer having a basic group is a monomer having a primary amino group, a secondary amino group, a tertiary amino group, or a quaternary ammonium group,
Specific examples of the monomer include N,N-dimethylaminoethyl (meth)acrylate, N,N-diethylaminoethyl (meth)acrylate, N,N-dimethylacrylamide, diethylacrylamide, dimethylaminopropyl methacrylamide, acryloylmorpholine, vinylimidazole, 2-vinylpyridine, a monomer having an amino group and a caprolactone skeleton, a reaction product of a monomer having a glycidyl group such as glycidyl (meth)acrylate with a compound having one secondary amino group in the molecule, and a reaction product of a (meth)acryloylalkylisocyanate compound with 4-(2-aminomethyl)-pyridine, 4-(2-aminoethyl)-pyridine, 4-(2-hydroxyethyl)pyridine, 1-(2-aminoethyl)-piperazine, 2-amino-6-methoxybenzothiazole, 1-(2-hydroxyethylimidazole), N,N-diallylmelamine, or N,N-dimethyl-1,3-propanediamine.

The monomer having an acidic group is a monomer having a carboxy group, a sulfonic acid group, or a phosphoric acid group. Specifically, examples of the monomer having a carboxy group include unsaturated monocarboxylic acid compounds such as acrylic acid, methacrylic acid, and crotonic acid, and unsaturated dicarboxylic acid compounds and half esters thereof such as maleic acid, fumaric acid, and itaconic acid. Examples of the monomer having a sulfonic acid group include 2-acrylamido-2-methyl-1-propanesulfonic acid, 2-methacrylamido-2-methyl-1-propanesulfonic acid, and styrenesulfonic acid. Examples of the monomer having a phosphoric acid group include acid phosphonyl (meth)acrylate and acid phosphonylethyl (meth)acrylate.

Examples of the constituent components of the block not containing a colorant-adsorptive group include aromatic vinyl compounds such as styrene, α-methylstyrene, and vinyltoluene; unsaturated carboxylic acid alkyl esters such as methyl (meth)acrylate, ethyl (meth)acrylate, and butyl (meth)acrylate; unsaturated carboxylic acid aryl alkyl esters such as benzyl (meth)acrylate; polycaprolactone-containing monomers; and polyalkylene glycol monoester-based monomers.
The acrylic block copolymer can be obtained by living anionic polymerization or the like, and a conventionally known polymerization method can be used.

The amine value of the acrylic block copolymer is greater than 0 mgKOH/g and not greater than 30 mgKOH/g, and preferably is 0.5 mgKOH/g or more and 15 mgKOH/g or less.
The amine value means the amine value per 1 g of the solid content of the acrylic block copolymer, and is a value measured by potentiometric titration (e.g., COMTITE (AUTO TITRATOR COM-900, BURET B-900, TITSTATION K-900), manufactured by Hiranuma Sangyo Co., Ltd.) using a 0.1 mol/L aqueous hydrochloric acid solution, and then converted into an equivalent amount of potassium hydroxide.

Commercially available products of the acrylic block copolymer include "Disperbyk (registered trademark)-2000 (amine value 4 mg KOH/g)", "Disperbyk (registered trademark)-2001 (amine value 29 mg KOH/g)", "Disperbyk (registered trademark)-2009 (amine value 4 mg KOH/g)", "Disperbyk (registered trademark)-2050 (amine value 30 mg KOH/g)", and "Disperbyk (registered trademark)-2070 (amine value 20 mg KOH/g)", all manufactured by BYK Japan.

The urethane-based dispersant can be one obtained by reacting the isocyanate group of a polyisocyanate compound with a compound having a number average molecular weight of 300 to 10,000 and one or more hydroxyl groups in the molecule, and a basic group-containing compound having a functional group in the molecule that can react with the isocyanate group. Methods for obtaining such urethane-based dispersants include the methods described in JP-A-60-166318.

Examples of the polyisocyanate compound constituting the urethane-based dispersant include isocyanate compounds having two or more isocyanate groups, such as aromatic diisocyanate compounds such as 2,4-tolylene diisocyanate, a dimer of 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, p-xylylene diisocyanate, m-xylylene diisocyanate, 4,4'-diphenylmethane diisocyanate, 1,5-naphthylene diisocyanate, and 3,3'-dimethylbiphenyl-4,4'-diisocyanate; hexamethylene diisocyanate, isophorone diisocyanate, and the like. Aliphatic or alicyclic polyisocyanates such as isocyanate, 4,4'-methylenebis(cyclohexylisocyanate), methylcyclohexane-2,4 (or 2,6) diisocyanate, and 1,3-(isocyanatomethylene)cyclohexane; polyisocyanates having an isocyanuric group based on the above diisocyanates (such as polyisocyanates having an isocyanuric group formed by trimerization of the above diisocyanates), polyisocyanates obtained by reacting polyols with diisocyanates, and polyisocyanates obtained by biuret reaction of diisocyanate compounds. Among the above polyisocyanate compounds, for example, polyisocyanates having an isocyanuric group based on diisocyanates such as tolylene diisocyanate and isophorone diisocyanate are preferred.

Examples of the compound having one or more hydroxy groups in the molecule that constitutes the urethane-based dispersant include polyether compounds and polyester compounds.
Examples of the polyether compound include polyalkylene glycols such as polyethylene glycol, polypropylene glycol, polybutylene glycol, and polytetramethylene glycol; alkylene glycols such as ethylene glycol, propanediol, propylene glycol, tetramethylene glycol, pentamethylene glycol, hexanediol, neopentyl glycol, glycerin, trimethylolpropane, pentaerythritol, diglycerin, ditrimethylolpropane, and dipentaerythritol; and ethylene oxide-modified, propylene oxide-modified, butylene oxide-modified, and tetrahydrofuran-modified products of low molecular weight monools such as methanol and ethanol.

Examples of the polyester compounds include alkylene glycols such as ethylene glycol, propanediol, propylene glycol, tetramethylene glycol, pentamethylene glycol, hexanediol, neopentyl glycol, glycerin, trimethylolpropane, pentaerythritol, diglycerin, ditrimethylolpropane, and dipentaerythritol; low molecular weight monools such as methanol and ethanol; ε-caprolactone-modified products, γ-butyrolactone-modified products, δ-valerolactone-modified products, and methylvalerolactone-modified products; and esterification of aliphatic dicarboxylic acids such as adipic acid and dimer acid with polyols such as neopentyl glycol and methylpentanediol. Examples of suitable polyhydric hydroxyl group-containing compounds include aliphatic polyester polyols, which are esters of aromatic dicarboxylic acids such as terephthalic acid and polyols such as neopentyl glycol; esters of polyhydric hydroxyl group-containing compounds such as polycarbonate polyols, acrylic polyols, and polytetramethylene hexaglyceryl ether (tetrahydrofuran-modified hexaglycerin) and dicarboxylic acids such as fumaric acid, phthalic acid, isophthalic acid, itaconic acid, adipic acid, sebacic acid, and maleic acid; and polyhydric hydroxyl group-containing compounds such as monoglycerides obtained by transesterification of polyhydric hydroxyl group-containing compounds such as glycerin and fatty acid esters. Among the above compounds having one or more hydroxyl groups in the molecule, ε-caprolactone adducts of alcohols are preferred.

The number average molecular weight of the compound having one or more hydroxyl groups in the molecule is, for example, 300 to 10,000, and preferably 300 to 6,000. The number average molecular weight can be measured by column chromatography.

The basic group-containing compound having a functional group capable of reacting with an isocyanate group in the molecule constituting the urethane-based dispersant is not particularly limited, but is preferably at least one compound selected from the group consisting of polyols, polythiols, and amines having an N,N-disubstituted amino group or a heterocyclic nitrogen atom. As these compounds, compounds that are commonly known and commonly used in the technical field of dispersants can be used. These compounds have a Zerewitinoff active hydrogen atom and at least one nitrogen atom-containing basic group. Examples of such compounds include N,N-dimethyl-1,3-propanediamine, N,N-diethyl-1,4-butanediamine, 2-dimethylaminoethanol, 1-(2-aminoethyl)-piperazine, 2-(1-pyrrolidyl)-ethylamine, 4-amino-2-methoxypyrimidine, 4-(2-aminoethyl)-pyridine, 1-(2-hydroxyethyl)-piperazine, 4-(2-hydroxyethyl)-morpholine, 2-mercaptopyrimidine, 2-mercaptobenzimidazole, 2-amino-6-methoxybenzothiazole, N,N-diallyl-melamine, 3-amino-1,2,4-triazole, 1-(2-hydroxyethyl)-imidazole, and 3-mercapto-1,2,4-triazole. Among these, amines having a heterocyclic nitrogen atom are preferred.

The reaction for synthesizing the urethane-based dispersant is not particularly limited, and can be carried out by a conventionally known method. The amine value of the urethane-based dispersant is also more than 0 mgKOH/g and not more than 30 mgKOH/g, and preferably is 0.5 mgKOH/g or more and not more than 15 mgKOH/g.

Examples of commercially available urethane dispersants include Disperbyk (registered trademark)-161 (amine value 11 mg KOH/g, manufactured by BYK), Disperbyk (registered trademark)-162 (amine value 13 mg KOH/g, manufactured by BYK), Disperbyk (registered trademark)-167 (amine value 13 mg KOH/g, manufactured by BYK), Disperbyk (registered trademark)-182 (amine value 13 mg KOH/g, manufactured by BYK), Disperbyk (registered trademark)-2163 (amine value 10 mg KOH/g, manufactured by BYK), and Disperbyk (registered trademark)-2164 (amine value 14 mg KOH/g, manufactured by BYK).

Among these, the dispersant is preferably an acrylic dispersant, and the dispersant preferably has a tertiary amino group or a basic functional group of a nitrogen-containing heterocycle (e.g., pyridine, pyrimidine, pyrazine, isocyanate), and more preferably has a tertiary amino group.

The content of the dispersant is preferably 0.1 parts by mass or more and 50 parts by mass or less, more preferably 1 part by mass or more and 45 parts by mass or less, even more preferably 2 parts by mass or more and 40 parts by mass or less, still more preferably 3 parts by mass or more and 35 parts by mass or less, and particularly preferably 4 parts by mass or more and 30 parts by mass or less, and may be 20 parts by mass or less, or 10 parts by mass or less, relative to 100 parts by mass of the colorant.
The content of the dispersant is preferably 0.001 to 5 mass %, more preferably 0.05 to 3 mass %, and even more preferably 0.10 to 1 mass %, based on 100 mass % of the solid content of the colored curable resin composition.

From the viewpoint of improving handling, the dispersant is preferably mixed with a solvent before being mixed with other components (hereinafter, also referred to as a dispersant-containing solution).
In the dispersant-containing solution, the content of the dispersant is, in terms of solid content, for example, 10 to 60 mass %, preferably 20 to 50 mass %.
In the present invention, the smaller the amine value of the dispersant, the smaller the content of the dispersant, and the more the colorant is dispersed, the more the prevention of fading, the absorbance retention rate, and the contrast can be improved.
The colorant may be contained in a dispersion obtained by dispersing the colorant in a solvent using a dispersant or a dispersant-containing solution, and the dispersion may be used in the colored curable resin composition.

<Resin (B)>
The resin (B) is not particularly limited, but is preferably an alkali-soluble resin. Examples of the resin (B) include the following resins [K1] to [K6].
Resin [K1]: a copolymer having a structural unit derived from at least one member (a) (hereinafter sometimes referred to as "(a)") selected from the group consisting of unsaturated carboxylic acids and unsaturated carboxylic anhydrides, and a structural unit derived from a monomer (b) (hereinafter sometimes referred to as "(b)") having a cyclic ether structure having 2 to 4 carbon atoms and an ethylenically unsaturated bond;
Resin [K2]: a copolymer having a structural unit derived from (a), a structural unit derived from (b), and a structural unit derived from a monomer (c) copolymerizable with (a) (however, different from (a) and (b)) (hereinafter, may be referred to as "(c)");
Resin [K3]: a copolymer having a structural unit derived from (a) and a structural unit derived from (c);
Resin [K4]: a copolymer having a structural unit derived from (a) to which (b) has been added, and a structural unit derived from (c);
Resin [K5]: a copolymer having a structural unit derived from (b) to which (a) has been added, and a structural unit derived from (c);
Resin [K6]: A copolymer having a structural unit obtained by adding (a) to a structural unit derived from (b) and further adding a carboxylic acid anhydride, and a structural unit derived from (c).

Specific examples of (a) include unsaturated monocarboxylic acids such as acrylic acid, methacrylic acid, crotonic acid, o-, m-, and p-vinylbenzoic acid;
Unsaturated dicarboxylic acids such as maleic acid, fumaric acid, citraconic acid, mesaconic acid, itaconic acid, 3-vinylphthalic acid, 4-vinylphthalic acid, 3,4,5,6-tetrahydrophthalic acid, 1,2,3,6-tetrahydrophthalic acid, dimethyltetrahydrophthalic acid, and 1,4-cyclohexenedicarboxylic acid;
Bicyclounsaturated compounds containing a carboxy group, such as methyl-5-norbornene-2,3-dicarboxylic acid, 5-carboxybicyclo[2.2.1]hept-2-ene, 5,6-dicarboxybicyclo[2.2.1]hept-2-ene, 5-carboxy-5-methylbicyclo[2.2.1]hept-2-ene, 5-carboxy-5-ethylbicyclo[2.2.1]hept-2-ene, 5-carboxy-6-methylbicyclo[2.2.1]hept-2-ene, and 5-carboxy-6-ethylbicyclo[2.2.1]hept-2-ene;
Unsaturated dicarboxylic acid anhydrides such as maleic anhydride, citraconic anhydride, itaconic anhydride, 3-vinylphthalic anhydride, 4-vinylphthalic anhydride, 3,4,5,6-tetrahydrophthalic anhydride, 1,2,3,6-tetrahydrophthalic anhydride, dimethyltetrahydrophthalic anhydride, and 5,6-dicarboxybicyclo[2.2.1]hept-2-ene anhydride;
Unsaturated mono[(meth)acryloyloxyalkyl] esters of divalent or higher polyvalent carboxylic acids, such as mono[2-(meth)acryloyloxyethyl] succinate and mono[2-(meth)acryloyloxyethyl] phthalate;
Unsaturated acrylates containing a hydroxy group and a carboxy group in the same molecule, such as α-(hydroxymethyl)acrylic acid; and the like.
Among these, acrylic acid, methacrylic acid, maleic anhydride, etc. are preferred from the standpoint of copolymerization reactivity and solubility of the resulting resin in an aqueous alkaline solution.

(b) is, for example, a polymerizable compound having a cyclic ether structure having 2 to 4 carbon atoms (for example, at least one selected from the group consisting of an oxirane ring, an oxetane ring, and a tetrahydrofuran ring) and an ethylenically unsaturated bond. (b) is preferably a monomer having a cyclic ether having 2 to 4 carbon atoms and a (meth)acryloyloxy group.

Examples of (b) include a monomer (b1) having an oxiranyl group and an ethylenically unsaturated bond (hereinafter sometimes referred to as "(b1)"), a monomer (b2) having an oxetanyl group and an ethylenically unsaturated bond (hereinafter sometimes referred to as "(b2)"), and a monomer (b3) having a tetrahydrofuryl group and an ethylenically unsaturated bond (hereinafter sometimes referred to as "(b3)").

Examples of (b1) include monomer (b1-1) (hereinafter sometimes referred to as "(b1-1)") having a structure in which a linear or branched aliphatic unsaturated hydrocarbon is epoxidized, and monomer (b1-2) (hereinafter sometimes referred to as "(b1-2)") having a structure in which an alicyclic unsaturated hydrocarbon is epoxidized.

(b1-1) includes glycidyl (meth)acrylate, β-methyl glycidyl (meth)acrylate, β-ethyl glycidyl (meth)acrylate, glycidyl vinyl ether, o-vinylbenzyl glycidyl ether, m-vinylbenzyl glycidyl ether, p-vinylbenzyl glycidyl ether, α-methyl-o-vinylbenzyl glycidyl ether, α-methyl-m-vinylbenzyl glycidyl ether, α-methyl-p-vinylbenzyl glycidyl ether, 2,3-bis(glycidyl oxymethyl)styrene, 2,4-bis(glycidyloxymethyl)styrene, 2,5-bis(glycidyloxymethyl)styrene, 2,6-bis(glycidyloxymethyl)styrene, 2,3,4-tris(glycidyloxymethyl)styrene, 2,3,5-tris(glycidyloxymethyl)styrene, 2,3,6-tris(glycidyloxymethyl)styrene, 3,4,5-tris(glycidyloxymethyl)styrene, 2,4,6-tris(glycidyloxymethyl)styrene, etc.

Examples of (b1-2) include vinylcyclohexene monoxide, 1,2-epoxy-4-vinylcyclohexane (e.g., Celloxide 2000; manufactured by Daicel Corporation), 3,4-epoxycyclohexylmethyl (meth)acrylate (e.g., Cyclomer A400; manufactured by Daicel Corporation), 3,4-epoxycyclohexylmethyl (meth)acrylate (e.g., Cyclomer M100; manufactured by Daicel Corporation), compounds represented by formula (I) and compounds represented by formula (II).

In formula (I) and formula (II), R ^a and R ^b represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and the hydrogen atom contained in the alkyl group may be substituted with a hydroxy group.
X ^a and X ^b each represent a single bond, *-R ^c -, *-R ^c -O-, *-R ^c -S- or *-R ^c -NH-.
R ^c represents an alkanediyl group having 1 to 6 carbon atoms.
* represents a bond to O.

Examples of the alkyl group having 1 to 4 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, a sec-butyl group, and a tert-butyl group.
Examples of the alkyl group in which a hydrogen atom is substituted with a hydroxy group include a hydroxymethyl group, a 1-hydroxyethyl group, a 2-hydroxyethyl group, a 1-hydroxypropyl group, a 2-hydroxypropyl group, a 3-hydroxypropyl group, a 1-hydroxy-1-methylethyl group, a 2-hydroxy-1-methylethyl group, a 1-hydroxybutyl group, a 2-hydroxybutyl group, a 3-hydroxybutyl group, and a 4-hydroxybutyl group.
R ^a and R ^b are preferably a hydrogen atom, a methyl group, a hydroxymethyl group, a 1-hydroxyethyl group, or a 2-hydroxyethyl group, and more preferably a hydrogen atom or a methyl group.

Examples of the alkanediyl group include a methylene group, an ethylene group, a propane-1,2-diyl group, a propane-1,3-diyl group, a butane-1,4-diyl group, a pentane-1,5-diyl group, and a hexane-1,6-diyl group.
X ^a and X ^b are preferably a single bond, a methylene group, an ethylene group, *-CH ₂ -O- and *-CH ₂ CH ₂ -O-, more preferably a single bond or *-CH ₂ CH ₂ -O- (* represents a bond to O).

Examples of compounds represented by formula (I) include compounds represented by any of formulas (I-1) to (I-15). Among them, compounds represented by formulas (I-1), (I-3), (I-5), (I-7), (I-9) or (I-11) to (I-15) are preferred, and compounds represented by formulas (I-1), (I-7), (I-9) or (I-15) are more preferred.

Examples of compounds represented by formula (II) include compounds represented by any of formulas (II-1) to (II-15). Among them, compounds represented by formulas (II-1), (II-3), (II-5), (II-7), (II-9) or (II-11) to (II-15) are preferred, and compounds represented by formulas (II-1), (II-7), (II-9) or (II-15) are more preferred.

The compound represented by formula (I) and the compound represented by formula (II) may be used alone or in combination of two or more kinds. When the compound represented by formula (I) and the compound represented by formula (II) are used in combination, the content ratio thereof [compound represented by formula (I): compound represented by formula (II)] is preferably 5:95 to 95:5, more preferably 20:80 to 80:20 on a molar basis.

As (b2), a monomer having an oxetanyl group and a (meth)acryloyloxy group is more preferable. Examples of (b2) include 3-methyl-3-methacryloyloxymethyloxetane, 3-methyl-3-acryloyloxymethyloxetane, 3-ethyl-3-methacryloyloxymethyloxetane, 3-ethyl-3-acryloyloxymethyloxetane, 3-methyl-3-methacryloyloxyethyloxetane, 3-methyl-3-acryloyloxyethyloxetane, 3-ethyl-3-methacryloyloxyethyloxetane, 3-ethyl-3-acryloyloxyethyloxetane, and the like.

As (b3), a monomer having a tetrahydrofuryl group and a (meth)acryloyloxy group is more preferable. Specific examples of (b3) include tetrahydrofurfuryl acrylate (e.g., Viscoat V#150, manufactured by Osaka Organic Chemical Industry Co., Ltd.), tetrahydrofurfuryl methacrylate, etc.

As for (b), (b1) is preferable in that it can further increase the reliability of the heat resistance, chemical resistance, etc. of the obtained color filter. Furthermore, (b1-2) is more preferable in that the storage stability of the colored curable resin composition is excellent.

Examples of (c) include methyl (meth)acrylate, ethyl (meth)acrylate, n-butyl (meth)acrylate, sec-butyl (meth)acrylate, tert-butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, dodecyl (meth)acrylate, lauryl (meth)acrylate, stearyl (meth)acrylate, cyclopentyl (meth)acrylate, cyclohexyl (meth)acrylate, 2-methylcyclohexyl (meth)acrylate, tricyclo[5.2.1.0 ^2,6 ]decan-8-yl (meth)acrylate (commonly known in the art as "dicyclopentanyl (meth)acrylate" and sometimes referred to as "tricyclodecyl (meth)acrylate"), tricyclo[5.2.1.0 ^2,6 ](meth)acrylic acid esters such as decene-8-yl (meth)acrylate (commonly known in the art as "dicyclopentenyl (meth)acrylate"), dicyclopentanyloxyethyl (meth)acrylate, isobornyl (meth)acrylate, adamantyl (meth)acrylate, allyl (meth)acrylate, propargyl (meth)acrylate, phenyl (meth)acrylate, naphthyl (meth)acrylate, and benzyl (meth)acrylate;
Hydroxy group-containing (meth)acrylic acid esters such as 2-hydroxyethyl (meth)acrylate and 2-hydroxypropyl (meth)acrylate;
dicarboxylic acid diesters such as diethyl maleate, diethyl fumarate, and diethyl itaconate;
Bicyclo[2.2.1]hept-2-ene, 5-methylbicyclo[2.2.1]hept-2-ene, 5-ethylbicyclo[2.2.1]hept-2-ene, 5-hydroxybicyclo[2.2.1]hept-2-ene, 5-hydroxymethylbicyclo[2.2.1]hept-2-ene, 5-(2'-hydroxyethyl)bicyclo[2.2.1]hept-2-ene, 5-methoxybicyclo[2.2.1]hept-2-ene, chloro[2.2.1]hept-2-ene, 5-ethoxybicyclo[2.2.1]hept-2-ene, 5,6-dihydroxybicyclo[2.2.1]hept-2-ene, 5,6-di(hydroxymethyl)bicyclo[2.2.1]hept-2-ene, 5,6-di(2'-hydroxyethyl)bicyclo[2.2.1]hept-2-ene, 5,6-dimethoxybicyclo[2.2.1]hept -2-ene, 5,6-diethoxybicyclo[2.2.1]hept-2-ene, 5-hydroxy-5-methylbicyclo[2.2.1]hept-2-ene, 5-hydroxy-5-ethylbicyclo[2.2.1]hept-2-ene, 5-hydroxymethyl-5-methylbicyclo[2.2.1]hept-2-ene, 5-tert-butoxycarbonylbicyclo[2.2.1]hept-2-ene bicyclounsaturated compounds such as ene, 5-cyclohexyloxycarbonylbicyclo[2.2.1]hept-2-ene, 5-phenoxycarbonylbicyclo[2.2.1]hept-2-ene, 5,6-bis(tert-butoxycarbonyl)bicyclo[2.2.1]hept-2-ene, and 5,6-bis(cyclohexyloxycarbonyl)bicyclo[2.2.1]hept-2-ene;
Dicarbonyl imide derivatives such as N-phenylmaleimide, N-cyclohexylmaleimide, N-benzylmaleimide, N-succinimidyl-3-maleimidobenzoate, N-succinimidyl-4-maleimidobutyrate, N-succinimidyl-6-maleimidocaproate, N-succinimidyl-3-maleimidopropionate, and N-(9-acridinyl)maleimide;
Examples of the copolymer include styrene, α-methylstyrene, m-methylstyrene, p-methylstyrene, vinyltoluene, p-methoxystyrene, acrylonitrile, methacrylonitrile, vinyl chloride, vinylidene chloride, acrylamide, methacrylamide, vinyl acetate, 1,3-butadiene, isoprene, and 2,3-dimethyl-1,3-butadiene.
Among these, 2-hydroxyethyl (meth)acrylate, styrene, vinyltoluene, N-phenylmaleimide, N-cyclohexylmaleimide, N-benzylmaleimide, bicyclo[2.2.1]hept-2-ene, and the like are preferred from the standpoint of copolymerization reactivity and heat resistance.

In the resin [K1], the ratio of the structural units derived from each of them to all the structural units constituting the resin [K1] is as follows:
Structural units derived from (a): 2 to 60 mol%
Structural units derived from (b): 40 to 98 mol%
It is preferred that
Structural units derived from (a): 10 to 50 mol %
Structural units derived from (b): 50 to 90 mol%
It is more preferable that:
When the ratio of the structural units of the resin [K1] is within the above range, the colored curable resin composition tends to have excellent storage stability, developability when forming a colored pattern, and solvent resistance of the obtained color filter.

Resin [K1] can be produced, for example, by referring to the method described in the literature "Experimental Methods for Polymer Synthesis" (written by Takayuki Otsu, published by Kagaku Dojin Co., Ltd., 1st edition, 1st printing, published March 1, 1972) and the references cited in said literature.

Specific examples of the method include a method in which predetermined amounts of (a) and (b), a polymerization initiator, a solvent, and the like are placed in a reaction vessel, and the atmosphere is deoxygenated, for example by replacing oxygen with nitrogen, and the mixture is heated and kept warm while stirring. The polymerization initiator and solvent used here are not particularly limited, and those commonly used in the relevant field can be used. For example, polymerization initiators include azo compounds (2,2'-azobisisobutyronitrile, 2,2'-azobis(2,4-dimethylvaleronitrile), etc.) and organic peroxides (benzoyl peroxide, etc.), and solvents that dissolve each monomer are sufficient, and examples of the solvent include the solvents described below as the solvent (E) of the colored curable resin composition of the present invention.

The copolymer obtained may be used as it is in the solution after the reaction, or may be a concentrated or diluted solution, or may be extracted as a solid (powder) by a method such as reprecipitation. In particular, by using the solvent contained in the colored curable resin composition of the present invention as the solvent during this polymerization, the solution after the reaction can be used as it is in the preparation of the colored curable resin composition of the present invention, and the manufacturing process of the colored curable resin composition of the present invention can be simplified.

In the resin [K2], the ratio of the structural units derived from each of them to all the structural units constituting the resin [K2] is as follows:
Structural units derived from (a): 2 to 45 mol%
Structural units derived from (b): 2 to 95 mol%
Structural units derived from (c): 1 to 65 mol%
It is preferred that
Structural units derived from (a): 5 to 40 mol%
Structural units derived from (b): 5 to 80 mol%
Structural units derived from (c): 5 to 60 mol%
It is more preferable that:
When the ratio of the structural units of the resin [K2] is within the above range, the colored curable resin composition tends to have excellent storage stability, developability when forming a colored pattern, and the obtained color filter tends to have excellent solvent resistance, heat resistance, and mechanical strength.

Resin [K2] can be produced, for example, in the same manner as described for producing resin [K1].

In the resin [K3], the ratio of the structural units derived from each of them to all the structural units constituting the resin [K3] is as follows:
Structural units derived from (a): 2 to 60 mol%
Structural units derived from (c): 40 to 98 mol%
It is preferred that
Structural units derived from (a): 10 to 50 mol %
Structural units derived from (c): 50 to 90 mol%
It is more preferable that:
Resin [K3] can be produced, for example, in the same manner as described above for producing resin [K1].

Resin [K4] can be produced by obtaining a copolymer of (a) and (c), and adding the cyclic ether having 2 to 4 carbon atoms contained in (b) to the carboxylic acid and/or carboxylic acid anhydride contained in (a).
First, a copolymer of (a) and (c) is produced in the same manner as described for the production method of resin [K1]. In this case, the ratio of the structural units derived from each is preferably the same as that described for resin [K3].

Next, a part of the carboxylic acid and/or carboxylic acid anhydride derived from (a) in the copolymer is reacted with a cyclic ether having 2 to 4 carbon atoms contained in (b).
Following the production of the copolymer of (a) and (c), the atmosphere in the flask is replaced with air instead of nitrogen, and (b) a catalyst for the reaction of a carboxylic acid or a carboxylic acid anhydride with a cyclic ether (e.g., tris(dimethylaminomethyl)phenol, etc.), a polymerization inhibitor (e.g., hydroquinone, etc.), etc. are placed in the flask, and the mixture is reacted, for example, at 60 to 130° C. for 1 to 10 hours, thereby producing the resin [K4].
The amount of (b) used is preferably 5 to 80 moles, more preferably 10 to 75 moles, relative to 100 moles of (a). By setting it within this range, the storage stability of the colored curable resin composition, the developability when forming a pattern, and the balance of the solvent resistance, heat resistance, mechanical strength, and sensitivity of the obtained pattern tend to be good. Since the reactivity of the cyclic ether is high and unreacted (b) is unlikely to remain, (b1) is preferable as (b) used in resin [K4], and (b1-1) is more preferable.
The amount of the reaction catalyst used is preferably 0.001 to 5 parts by mass per 100 parts by mass of the total amount of (a), (b) and (c), and the amount of the polymerization inhibitor used is preferably 0.001 to 5 parts by mass per 100 parts by mass of the total amount of (a), (b) and (c).
The reaction conditions such as the charging method, reaction temperature and time can be appropriately adjusted in consideration of the production equipment, the amount of heat generated by the polymerization, etc. As with the polymerization conditions, the charging method and reaction temperature can be appropriately adjusted in consideration of the production equipment, the amount of heat generated by the polymerization, etc.

Resin [K5] is produced in the first step by the same method as that for producing resin [K1] described above, to obtain a copolymer of (b) and (c). As in the above, the copolymer obtained may be used as it is in the form of a solution after the reaction, or may be a concentrated or diluted solution, or may be extracted as a solid (powder) by a method such as reprecipitation.
The ratios of the structural units derived from (b) and (c) to the total number of moles of all structural units constituting the copolymer are, respectively,
Structural units derived from (b): 5 to 95 mol%
Structural units derived from (c): 5 to 95 mol%
It is preferred that
Structural units derived from (b): 10 to 90 mol%
Structural units derived from (c): 10 to 90 mol%
It is more preferable that:

Furthermore, under the same conditions as in the production method of resin [K4], resin [K5] can be obtained by reacting a cyclic ether derived from (b) contained in a copolymer of (b) and (c) with a carboxylic acid or carboxylic anhydride contained in (a).
The amount of (a) to be reacted with the copolymer is preferably 5 to 80 moles per 100 moles of (b). Because the reactivity of cyclic ethers is high and unreacted (b) is unlikely to remain, (b1) is preferred as (b) for use in resin [K5], and (b1-1) is more preferred.

Resin [K6] is a resin obtained by further reacting resin [K5] with a carboxylic acid anhydride. The hydroxyl group generated by the reaction of a cyclic ether with a carboxylic acid or a carboxylic acid anhydride is reacted with the carboxylic acid anhydride.
Examples of the carboxylic acid anhydride include maleic anhydride, citraconic anhydride, itaconic anhydride, 3-vinylphthalic anhydride, 4-vinylphthalic anhydride, 3,4,5,6-tetrahydrophthalic anhydride, 1,2,3,6-tetrahydrophthalic anhydride, dimethyltetrahydrophthalic anhydride, 5,6-dicarboxybicyclo[2.2.1]hept-2-ene anhydride, etc. The amount of the carboxylic acid anhydride used is preferably 0.5 to 1 mole per mole of the amount of (a) used.

Specific examples of the resin (B) include resins [K1] such as 3,4-epoxycyclohexylmethyl (meth)acrylate/(meth)acrylic acid copolymer, 3,4-epoxytricyclo[5.2.1.0 ^2,6 ]decyl acrylate/(meth)acrylic acid copolymer, glycidyl (meth)acrylate/benzyl (meth)acrylate/(meth)acrylic acid copolymer, glycidyl (meth)acrylate/styrene/(meth)acrylic acid copolymer, 3,4-epoxytricyclo[5.2.1.0 ^2,6 ]decyl acrylate/(meth)acrylic acid/N-cyclohexylmaleimide copolymer, 3,4-epoxytricyclo[5.2.1.0 ^2,6 ]decyl acrylate/(meth)acrylic acid/N-cyclohexylmaleimide/2-hydroxyethyl (meth)acrylate copolymer, 3-methyl-3-(meth)acryloyloxymethyloxetane/(meth)acrylic acid/styrene copolymer, and other resins [K2]; benzyl (meth)acrylate/(meth)acrylic acid copolymer, styrene/(meth)acrylic acid copolymer, and other resins [K3]; resins obtained by adding glycidyl (meth)acrylate to a benzyl (meth)acrylate/(meth)acrylic acid copolymer, resins obtained by adding glycidyl (meth)acrylate to a tricyclodecyl (meth)acrylate/styrene/(meth)acrylic acid copolymer, tricyclodecyl Resins [K4] such as a resin obtained by adding glycidyl (meth)acrylate to a (meth)acrylate/benzyl (meth)acrylate/(meth)acrylic acid copolymer; resins [K5] such as a resin obtained by reacting a tricyclodecyl (meth)acrylate/glycidyl (meth)acrylate copolymer with (meth)acrylic acid, or a tricyclodecyl (meth)acrylate/styrene/glycidyl (meth)acrylate copolymer with (meth)acrylic acid; and resins [K6] such as a resin obtained by reacting a tricyclodecyl (meth)acrylate/glycidyl (meth)acrylate copolymer with (meth)acrylic acid and further reacting the resulting resin with tetrahydrophthalic anhydride.
Among these, as the resin (B), the resin [K1] and the resin [K2] are preferable, and the resin [K1] is particularly preferable.

The polystyrene-equivalent weight average molecular weight of resin (B) is preferably 3,000 to 100,000, more preferably 5,000 to 50,000, and even more preferably 5,000 to 30,000. When the molecular weight is within the above range, the hardness of the color filter is improved, the residual film rate is high, the solubility of the unexposed parts in the developer is good, and the resolution of the colored pattern tends to be improved.

The dispersity of resin (B) [weight average molecular weight (Mw)/number average molecular weight (Mn)] is preferably 1.1 to 6, and more preferably 1.2 to 4.

The acid value of resin (B) is preferably 10 to 170 mgKOH/g, more preferably 20 to 150 mgKOH/g, and even more preferably 30 to 135 mgKOH/g, calculated as solid content. Here, the acid value is a value measured as the amount (mg) of potassium hydroxide required to neutralize 1 g of resin (B), and can be determined, for example, by titration with an aqueous potassium hydroxide solution.

The content of resin (B) is preferably 7 to 65% by mass, more preferably 13 to 60% by mass, and even more preferably 17 to 55% by mass, based on the total amount of solids. When the content of resin (B) is within the above range, a colored pattern can be formed, and the resolution and remaining film rate of the colored pattern tend to be improved.

<Polymerizable compound (C)>
The polymerizable compound (C) is a compound that can be polymerized by active radicals and/or acids generated from the polymerization initiator (D), and examples thereof include compounds having a polymerizable ethylenically unsaturated bond, and are preferably (meth)acrylic acid ester compounds.

Among them, the polymerizable compound (C) is preferably a polymerizable compound having three or more ethylenically unsaturated bonds. Examples of such polymerizable compounds include trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, dipentaerythritol hexa(meth)acrylate, tripentaerythritol octa(meth)acrylate, tripentaerythritol hepta(meth)acrylate, tetrapentaerythritol deca(meth)acrylate, tetrapentaerythritol nona(meth)acrylate, tri ... Examples of the acrylates include 2-(2-(meth)acryloyloxyethyl)isocyanurate, ethylene glycol modified pentaerythritol tetra(meth)acrylate, ethylene glycol modified dipentaerythritol hexa(meth)acrylate, propylene glycol modified pentaerythritol tetra(meth)acrylate, propylene glycol modified dipentaerythritol hexa(meth)acrylate, caprolactone modified pentaerythritol tetra(meth)acrylate, and caprolactone modified dipentaerythritol hexa(meth)acrylate.
Of these, dipentaerythritol penta(meth)acrylate and dipentaerythritol hexa(meth)acrylate are preferred.

The content of the polymerizable compound (C) is preferably 1 to 65% by mass, more preferably 5 to 60% by mass, and even more preferably 10 to 55% by mass, based on the total amount of solids. When the content of the polymerizable compound (C) is within the above range, the residual film rate during color pattern formation and the chemical resistance of the color filter tend to be improved.

<Polymerization initiator (D)>
The polymerization initiator (D) is not particularly limited as long as it is a compound that can generate active radicals, acids, etc. by the action of light or heat and initiate polymerization, and any known polymerization initiator can be used. Examples of polymerization initiators that generate active radicals include O-acyloxime compounds, alkylphenone compounds, triazine compounds, acylphosphine oxide compounds, and biimidazole compounds.

Examples of the O-acyloxime compounds include O-acyloxime compounds having a diphenyl sulfide skeleton such as N-benzoyloxy-1-(4-phenylsulfanylphenyl)butan-1-one-2-imine, N-benzoyloxy-1-(4-phenylsulfanylphenyl)octan-1-one-2-imine, N-benzoyloxy-1-(4-phenylsulfanylphenyl)-3-cyclopentylpropan-1-one-2-imine, and N-acetyloxy-1-(4-phenylsulfanylphenyl)-3-cyclohexylpropan-1-one-2-imine; N-acetoxy-1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]ethane-1- imine, N-acetoxy-1-[9-ethyl-6-{2-methyl-4-(3,3-dimethyl-2,4-dioxacyclopentanylmethyloxy)benzoyl}-9H-carbazol-3-yl]ethan-1-imine, N-acetoxy-1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]-3-cyclopentylpropan-1-imine, N-benzoyloxy-1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]-3-cyclopentylpropan-1-one-2-imine, and other O-acyloxime compounds having a carbazole skeleton; and 1-[7-(2-methylbenzoyl)-9,9-dipropyl-9H-fluoren-2-yl]ethanone O-acetyloxime, and other O-acyloxime compounds having a fluorene skeleton. Commercially available products such as Irgacure (registered trademark) OXE01 and OXE02 (both manufactured by BASF), N-1919 (manufactured by ADEKA Corporation), and DFI-091 (manufactured by Daito Chemistry Corporation) may also be used. Among them, the O-acyloxime compound is preferably at least one selected from the group consisting of N-benzoyloxy-1-(4-phenylsulfanylphenyl)octan-1-one-2-imine, N-acetyloxy-1-(4-phenylsulfanylphenyl)-3-cyclohexylpropan-1-one-2-imine, N-acetoxy-1-[9-ethyl-6-{2-methyl-4-(3,3-dimethyl-2,4-dioxacyclopentanylmethyloxy)benzoyl}-9H-carbazol-3-yl]ethane-1-imine, and 1-[7-(2-methylbenzoyl)-9,9-dipropyl-9H-fluoren-2-yl]ethanone O-acetyloxime. With these O-acyloxime compounds, a high brightness color filter tends to be obtained.

Examples of the alkylphenone compounds include 2-methyl-2-morpholino-1-(4-methylsulfanylphenyl)propan-1-one, 2-dimethylamino-1-(4-morpholinophenyl)-2-benzylbutan-1-one, 2-(dimethylamino)-2-[(4-methylphenyl)methyl]-1-[4-(4-morpholinyl)phenyl]butan-1-one, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 2-hydroxy-2-methyl-1-[4-(2-hydroxyethoxy)phenyl]propan-1-one, 1-hydroxycyclohexyl phenyl ketone, oligomers of 2-hydroxy-2-methyl-1-(4-isopropenylphenyl)propan-1-one, α,α-diethoxyacetophenone, and benzyl dimethyl ketal. Commercially available products such as Irgacure (registered trademark) 369, 907, and 379 (all manufactured by BASF) may also be used.

Examples of the triazine compounds include 2,4-bis(trichloromethyl)-6-(4-methoxyphenyl)-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-(4-methoxynaphthyl)-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-piperonyl-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-(4-methoxystyryl)-1,3,5-triazine, and 2,4-bis(trichloromethyl)-6-[ 2-(5-methylfuran-2-yl)ethenyl]-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(furan-2-yl)ethenyl]-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(4-diethylamino-2-methylphenyl)ethenyl]-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(3,4-dimethoxyphenyl)ethenyl]-1,3,5-triazine, etc.

The acylphosphine oxide compound may be 2,4,6-trimethylbenzoyldiphenylphosphine oxide. Commercially available products such as Irgacure (registered trademark) 819 (manufactured by BASF) may also be used.

Examples of the biimidazole compound include 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenylbiimidazole, 2,2'-bis(2,3-dichlorophenyl)-4,4',5,5'-tetraphenylbiimidazole (see, for example, JP-A-6-75372 and JP-A-6-75373), 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenylbiimidazole, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetra(alkoxyphenyl) 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetra(dialkoxyphenyl)biimidazole, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetra(trialkoxyphenyl)biimidazole (see, for example, JP-B-48-38403 and JP-A-62-174204), and biimidazole compounds in which the phenyl groups at the 4,4',5,5'-positions are substituted with carboalkoxy groups (see, for example, JP-A-7-10913).

Examples of polymerization initiators that generate acid include onium salts such as 4-hydroxyphenyl dimethylsulfonium p-toluenesulfonate, 4-hydroxyphenyl dimethylsulfonium hexafluoroantimonate, 4-acetoxyphenyl dimethylsulfonium p-toluenesulfonate, 4-acetoxyphenyl methyl benzylsulfonium hexafluoroantimonate, triphenylsulfonium p-toluenesulfonate, triphenylsulfonium hexafluoroantimonate, diphenyliodonium p-toluenesulfonate, and diphenyliodonium hexafluoroantimonate, as well as nitrobenzyl tosylates and benzoin tosylates.

Further examples of the polymerization initiator (D) include benzoin compounds such as benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, and benzoin isobutyl ether; benzophenone compounds such as benzophenone, o-benzoyl methyl benzoate, 4-phenylbenzophenone, 4-benzoyl-4'-methyldiphenyl sulfide, 3,3',4,4'-tetra(tert-butylperoxycarbonyl)benzophenone, and 2,4,6-trimethylbenzophenone; quinone compounds such as 9,10-phenanthrenequinone, 2-ethylanthraquinone, and camphorquinone; 10-butyl-2-chloroacridone, benzyl, methyl phenylglyoxylate, and titanocene compounds.

As the polymerization initiator (D), a polymerization initiator containing at least one selected from the group consisting of an O-acyloxime compound, an alkylphenone compound, a triazine compound, an acylphosphine oxide compound, and a biimidazole compound is preferred, and a polymerization initiator containing an O-acyloxime compound is more preferred.

The content of the polymerization initiator (D) is preferably 0.1 to 30 parts by mass, and more preferably 1 to 20 parts by mass, per 100 parts by mass of the total amount of the resin (B) and the polymerizable compound (C). When the content of the polymerization initiator (D) is within the above range, the sensitivity tends to be increased and the exposure time tends to be shortened, thereby improving the productivity of the color filter.

<Solvent (E)>
The colored curable resin composition of the present invention contains a solvent (E). The solvent (E) is not particularly limited, and a solvent normally used in the field can be used. For example, an ester solvent (a solvent containing -COO- in the molecule and not containing -O-), an ether solvent (a solvent containing -O- in the molecule and not containing -COO-), an ether ester solvent (a solvent containing -COO- and -O- in the molecule), a ketone solvent (a solvent containing -CO- in the molecule and not containing -COO-), an alcohol solvent (a solvent containing OH in the molecule and not containing -O-, -CO- and -COO-), an aromatic hydrocarbon solvent, an amide solvent, and dimethyl sulfoxide can be mentioned.

Examples of ester solvents include methyl lactate, ethyl lactate, butyl lactate, methyl 2-hydroxyisobutanoate, ethyl acetate, n-butyl acetate, isobutyl acetate, pentyl formate, isopentyl acetate, butyl propionate, isopropyl butyrate, ethyl butyrate, butyl butyrate, methyl pyruvate, ethyl pyruvate, propyl pyruvate, methyl acetoacetate, ethyl acetoacetate, cyclohexanol acetate, and γ-butyrolactone.

Ether solvents include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, propylene glycol monobutyl ether, 3-methoxy-1-butanol, 3-methoxy-3-methylbutanol, tetrahydrofuran, tetrahydropyran, 1,4-dioxane, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol methyl ethyl ether, diethylene glycol dipropyl ether, diethylene glycol dibutyl ether, anisole, phenetole, and methylanisole.

Ether ester solvents include methyl methoxyacetate, ethyl methoxyacetate, butyl methoxyacetate, methyl ethoxyacetate, ethyl ethoxyacetate, methyl 3-methoxypropionate, ethyl 3-methoxypropionate, methyl 3-ethoxypropionate, ethyl 3-ethoxypropionate, methyl 2-methoxypropionate, ethyl 2-methoxypropionate, propyl 2-methoxypropionate, methyl 2-ethoxypropionate, ethyl 2-ethoxypropionate, methyl 2-methoxy-2-methylpropionate, methyl 2-ethoxypropionate, Examples include ethyl oxy-2-methylpropionate, 3-methoxybutyl acetate, 3-methyl-3-methoxybutyl acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monopropyl ether acetate, ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, diethylene glycol monoethyl ether acetate, and diethylene glycol monobutyl ether acetate.

Ketone solvents include 4-hydroxy-4-methyl-2-pentanone (hereinafter sometimes referred to as diacetone alcohol), acetone, 2-butanone, 2-heptanone, 3-heptanone, 4-heptanone, 4-methyl-2-pentanone, cyclopentanone, cyclohexanone, and isophorone.

Alcohol solvents include methanol, ethanol, propanol, butanol, hexanol, cyclohexanol, ethylene glycol, propylene glycol, and glycerin.

Aromatic hydrocarbon solvents include benzene, toluene, xylene, and mesitylene.

Amide solvents include N,N-dimethylformamide, N,N-dimethylacetamide, and N-methylpyrrolidone.

Among the above solvents, from the viewpoint of coatability and drying property, organic solvents having a boiling point of 120°C or more and 180°C or less at 1 atm are preferred. As the solvent, propylene glycol monomethyl ether acetate, ethyl lactate, propylene glycol monomethyl ether, ethyl 3-ethoxypropionate, ethylene glycol monomethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diacetone alcohol and N,N-dimethylformamide are preferred, propylene glycol monomethyl ether acetate, propylene glycol monomethyl ether, diacetone alcohol, ethyl lactate and ethyl 3-ethoxypropionate are more preferred, and propylene glycol monomethyl ether acetate or a combination of propylene glycol monomethyl ether acetate and diacetone alcohol is even more preferred.

When the solvent (E) contains propylene glycol monomethyl ether acetate, the content of propylene glycol monomethyl ether acetate is preferably 40 to 100 mass%, more preferably 50 to 90 mass%, and even more preferably 60 to 80 mass% of the total amount of the solvent (E), and the content of the solvent other than propylene glycol monomethyl ether acetate (preferably diacetone alcohol) is preferably 0 to 60 mass%, more preferably 10 to 50 mass%, and even more preferably 20 to 40 mass% of the total amount of the solvent (E).

The content of the solvent (E) is preferably 70 to 95% by mass, more preferably 75 to 92% by mass, based on the total amount of the colored curable resin composition of the present invention. In other words, the total content of the solids in the colored curable resin composition is preferably 5 to 30% by mass, more preferably 8 to 25% by mass. When the content of the solvent (E) is within the above range, the flatness during application is good, and the color density is not insufficient when a color filter is formed, so that the display characteristics tend to be good.

<Leveling Agent (F)>
The colored curable resin composition of the present invention may further contain a leveling agent (F). Examples of the leveling agent (F) include silicone surfactants, fluorine surfactants, and silicone surfactants having fluorine atoms. These may have a polymerizable group in the side chain.
Examples of silicone surfactants include surfactants having siloxane bonds in the molecule.Specific examples include Toray Silicone DC3PA, SH7PA, DC11PA, SH21PA, SH28PA, SH29PA, SH30PA, and SH8400 (manufactured by Toray Dow Corning Co., Ltd.), KP321, KP322, KP323, KP324, KP326, KP340, and KP341 (manufactured by Shin-Etsu Chemical Co., Ltd.), TSF400, TSF401, TSF410, TSF4300, TSF4440, TSF4445, TSF4446, TSF4452, and TSF4460 (manufactured by Momentive Performance Materials Japan LLC).

Examples of the fluorosurfactant include surfactants having a fluorocarbon chain in the molecule. Specific examples include Fluorad (registered trademark) FC430 and FC431 (manufactured by Sumitomo 3M Limited), Megafac (registered trademark) F142D, F171, F172, F173, F177, F183, F554, R30, and RS-718-K (manufactured by DIC Corporation), F-top (registered trademark) EF301, EF303, EF351, and EF352 (manufactured by Mitsubishi Materials Electronic Chemicals Co., Ltd.), Surflon (registered trademark) S381, S382, SC101, and SC105 (manufactured by AGC Corporation), and E5844 (manufactured by Daikin Fine Chemicals Research Institute, Ltd.).

Examples of the silicone surfactant having a fluorine atom include surfactants having a siloxane bond and a fluorocarbon chain in the molecule. Specific examples include Megafac (registered trademark) R08, BL20, F475, F477, and F443 (manufactured by DIC Corporation).

The content of the leveling agent (F) is preferably 0.001% by mass or more and 0.2% by mass or less, more preferably 0.002% by mass or more and 0.2% by mass or less, and even more preferably 0.005% by mass or more and 0.2% by mass or less, based on the total amount of the colored curable resin composition. Note that this content does not include the content of the dispersant. When the content of the leveling agent (F) is within the above range, the flatness of the color filter can be improved.

<Other ingredients>
The colored curable resin composition of the present invention may contain additives known in the technical field, such as a polymerization initiator aid, a filler, another polymer compound, an adhesion promoter, a light stabilizer, and a chain transfer agent, as necessary.

<Method for producing colored curable resin composition>
The method for producing a colored curable resin composition of the present invention includes the steps of obtaining a dispersion (also referred to as a colorant dispersion) in which a colorant (A) is dispersed in a solvent (E) with a dispersant (P), and adding a resin (B), a polymerizable compound (C), and a polymerization initiator (D), and, as necessary, a leveling agent (F), and other components to the dispersion, wherein the colorant includes a squarylium dye having an absorption maximum in the visible light region, and the amine value of the dispersant is more than 0 mgKOH/g and not more than 30 mgKOH/g.
The colored curable resin composition may be prepared by mixing all the components, but it is preferable to mix or disperse a colorant dispersion in advance, and it is more preferable to include a step of obtaining a dispersion in which the colorant (A) is dispersed in the solvent (E) by the dispersant (P). The use of the dispersion can improve one or more of the following properties compared to the case where no dispersion is used: anti-fading, absorbance retention, and contrast.

Method for Producing Colorant Dispersion Liquid The colorant (A) is dispersed in a solvent (E) using a dispersant (P), and, if necessary, a resin (B) is also dispersed in the solvent (E), thereby producing a colorant dispersion liquid.
The dispersion treatment means mixing the colorant (A), resin (B), and other particles until they are in a dispersed state. The particles are pulverized into small pieces by this dispersion treatment. The dispersed state may also mean that each particle is distributed in the other components, and it is preferable that each particle is distributed approximately uniformly in the other components.

The colorant dispersion preferably contains a colorant (A), a dispersant (P), a resin (B), and a solvent (E).
The content of the colorant (A) in the colorant dispersion of the present invention is preferably 2% by mass or more, more preferably 3% by mass or more, and is preferably 30% by mass or less, more preferably 20% by mass or less, based on the total amount of the colorant dispersion.

The content of the solvent (E) is preferably 60% by mass or more, more preferably 75% by mass or more, and is preferably 95% by mass or less, more preferably 93% by mass or less, and most preferably 91% by mass or less, based on the total amount of the colorant dispersion.
When the colorant dispersion contains a resin (B), the content of the resin (B) is preferably 1% by mass or more, more preferably 2% by mass or more, and preferably 15% by mass or less, more preferably 7% by mass or less, based on the total amount of the colorant dispersion. When the content of the resin (B) is within the above range, the dispersion state of the colorant tends to be stable.
The content of the dispersant (P) in the colorant dispersion liquid is preferably 0.1 mass % or more, more preferably 0.3 mass % or more, and is preferably 20 mass % or less, more preferably 10 mass % or less, and further preferably 7 mass % or less, based on the total amount of the colorant dispersion liquid. When the content of the dispersant (P) is within the above range, the dispersion state of the colorant tends to be stable.

The temperature when dispersing the colorant (A) in the solvent (E) and when dispersing the mixture is preferably 120° C. or lower, more preferably 70° C. or lower. The lower limit of the temperature when dispersing is not particularly limited, but is usually 20° C.
The dispersion time is preferably 0.5 hours or more, more preferably 2 hours or more, and is preferably 48 hours or less, more preferably 20 hours or less.
Examples of the apparatus used for dispersion include a roll mill, a high-speed stirring device, a bead mill, a ball mill, a sand mill, a paint conditioner, an ultrasonic disperser, and a high-pressure disperser.
The obtained colorant dispersion is preferably filtered through a filter having a pore size of about 1.0 to 5.0 μm.

<Color Filter Manufacturing Method>
Examples of methods for producing a colored pattern from the colored curable resin composition of the present invention include a photolithography method, an inkjet method, a printing method, and the like. Among these, the photolithography method is preferred. The photolithography method is a method in which the colored curable resin composition is applied to a substrate, dried to form a colored composition layer, and the colored composition layer is exposed through a photomask and developed. In the photolithography method, a colored coating film, which is a cured product of the colored composition layer, can be formed by not using a photomask during exposure and/or not developing. The colored pattern or colored coating film thus formed is the color filter of the present invention.
The thickness of the color filter to be produced is not particularly limited and can be appropriately adjusted depending on the purpose and application, and is, for example, 0.1 to 30 μm, preferably 0.1 to 20 μm, and more preferably 0.5 to 6 μm.

As the substrate, glass plates such as quartz glass, borosilicate glass, alumina silicate glass, and soda lime glass with a silica-coated surface, resin plates such as polycarbonate, polymethylmethacrylate, and polyethylene terephthalate, silicon, and the above substrates on which aluminum, silver, and silver/copper/palladium alloy thin films are formed may be used. On these substrates, other color filter layers, resin layers, transistors, circuits, and the like may be formed. A silicon substrate that has been subjected to HMDS treatment may also be used.

The formation of each color pixel by photolithography can be carried out using known or conventional devices and conditions. For example, the pixel can be produced as follows.
First, a colored curable resin composition is applied onto a substrate, and then dried by heating (pre-baking) and/or drying under reduced pressure to remove volatile components such as a solvent, thereby obtaining a smooth colored composition layer.
Examples of the coating method include spin coating, slit coating, and slit and spin coating.
The temperature when drying by heating is preferably 30 to 120° C., more preferably 50 to 110° C. The heating time is preferably 10 seconds to 60 minutes, more preferably 30 seconds to 30 minutes.
When drying is carried out under reduced pressure, it is preferable to carry out the drying under a pressure of 50 to 150 Pa at a temperature of 20 to 25°C.
The thickness of the colored composition layer is not particularly limited, and may be appropriately selected depending on the intended thickness of the color filter.

Next, the coloring composition layer is exposed to light to form a colored coating film. When forming a colored pattern, the coloring composition layer is exposed to light through a photomask. The pattern on the photomask is not particularly limited, and a pattern according to the intended use is used.
The light source used for exposure is preferably a light source that generates light with a wavelength of 250 to 450 nm. For example, light less than 350 nm may be cut using a filter that cuts this wavelength range, or light around 436 nm, 408 nm, and 365 nm may be selectively extracted using a bandpass filter that extracts these wavelength ranges. Specific examples include mercury lamps, light-emitting diodes, metal halide lamps, and halogen lamps.
It is preferable to use a reduction projection exposure device or a proximity exposure device such as a mask aligner and a stepper, since it is possible to uniformly irradiate the entire exposure surface with parallel light rays and to accurately align the photomask with the substrate on which the colored composition layer is formed.

The colored composition layer after exposure is brought into contact with a developer and developed to form a colored pattern on the substrate. The unexposed portion of the colored composition layer is dissolved in the developer and removed by development. The developer is preferably an aqueous solution of an alkaline compound such as potassium hydroxide, sodium bicarbonate, sodium carbonate, or tetramethylammonium hydroxide. The concentration of these alkaline compounds in the aqueous solution is preferably 0.01 to 10% by mass, more preferably 0.03 to 5% by mass. Furthermore, the developer may contain a surfactant.
The developing method may be any of a puddle method, a dipping method, a spray method, etc. Furthermore, the substrate may be inclined at an arbitrary angle during the developing.
After development, it is preferable to wash with water.

Furthermore, it is preferable to perform post-baking on the obtained colored coating film or colored pattern. The post-baking temperature is preferably 80 to 250°C, more preferably 100 to 235°C. The post-baking time is preferably 1 to 120 minutes, more preferably 2 to 30 minutes.

According to the present invention, it is possible to provide a colored curable resin composition that is highly suitable for film formation processes. A color filter made from the colored curable resin composition is useful as a color filter for use in display devices (e.g., liquid crystal display devices, organic EL display devices, electronic paper, etc.) and solid-state imaging devices.

The present invention will be explained in more detail below with reference to examples, but the present invention is not limited to the following examples, and can of course be practiced with appropriate modifications within the scope of the purpose described above and below, all of which are within the technical scope of the present invention. In the examples, % and parts indicating the content or amount used are % by mass and parts by mass, respectively, unless otherwise specified.

[Colorant Synthesis Example 1]
50 parts of m-bromophenol (manufactured by Tokyo Chemical Industry Co., Ltd.) and 30 parts of imidazole (manufactured by Tokyo Chemical Industry Co., Ltd.) were dissolved in 500 parts of dichloromethane (manufactured by Kanto Chemical Co., Ltd.) and cooled to 0 ° C., and then 48 parts of tert-butyldimethylchlorosilane (manufactured by Tokyo Chemical Industry Co., Ltd.) were added dropwise. After the completion of the dropwise addition, the temperature was raised to 23 ° C. and stirred for 16 hours. After the reaction was completed, water was added to extract the organic layer, and the solvent was concentrated and then separated and purified by silica gel column chromatography to obtain 74 parts of the compound represented by formula (1-7). In the following, the structure of the compound was confirmed by mass spectrometry (LC; Agilent 1200 type, MASS; Agilent LC / MSD type).

Identification: (Mass spectrometry) Ionization mode = ESI+: m/z = [M+H] ⁺ 287.0
Exact Mass: +286.0

15 parts of 2,4-dimethylaniline (Tokyo Chemical Industry Co., Ltd.), 35 parts of the compound represented by formula (1-7), 14 parts of potassium hydroxide (Wako Pure Chemical Industries, Ltd.), 2 parts of tetrabutylammonium bromide (Tokyo Chemical Industry Co., Ltd.), and 0.6 parts of bis(tri-tert-butylphosphine)palladium(0) (Aldrich Co., Ltd.) were dissolved in 250 parts of toluene (Kanto Chemical Co., Ltd.) and 15 parts of water, heated to 90°C, and stirred for 30 minutes. After the reaction was completed, the organic layer was extracted and concentrated, and separated and purified by silica gel column chromatography to obtain 14 parts of the compound represented by formula (1-8).

Identification: (Mass spectrometry) Ionization mode = ESI+: m/z = [M+H] ⁺ 328.3
Exact Mass: +327.2

14 parts of the compound represented by formula (1-8) and 10 parts of methyl 4-chloro-4-oxobutyrate (manufactured by Tokyo Chemical Industry Co., Ltd.) were dissolved in 255 parts of toluene (manufactured by Kanto Chemical Co., Ltd.), heated to 90°C, and stirred for 1 hour. After the reaction was completed, water was added to extract the organic layer, the solvent was concentrated, and then separation and purification were performed by silica gel chromatography to obtain 15 parts of the compound represented by formula (1-9).

Identification: (Mass spectrometry) Ionization mode = ESI+: m/z = [M+H] ⁺ 442.3
Exact Mass: +441.2

15 parts of the compound represented by formula (1-9) were dissolved in 150 parts of tetrahydrofuran (Kanto Chemical Co., Ltd.), cooled to 0°C, and then 15 parts of a 1M solution of tetra-n-butylammonium fluoride in tetrahydrofuran (Tokyo Chemical Industry Co., Ltd.) was added dropwise. After the addition was completed, the temperature was raised to 23°C and the mixture was stirred for 2 hours. After the reaction was completed, the solvent was concentrated and the mixture was separated and purified by silica gel column chromatography to obtain 12 parts of the compound represented by formula (1-10).

Identification: (Mass spectrometry) Ionization mode = ESI+: m/z = [M+H] ⁺ 328.2
Exact Mass: +327.2

12 parts of the compound represented by formula (1-10) was dissolved in 240 parts of tetrahydrofuran (Kanto Chemical Co., Ltd.) and cooled to 0°C, after which 180 parts of borane-1M tetrahydrofuran solution (Kanto Chemical Co., Ltd.) was added dropwise. After the dropwise addition was completed, the mixture was stirred for 30 minutes, water was added, the tetrahydrofuran was concentrated, and the organic layer was extracted with ethyl acetate. After the solvent was concentrated, separation and purification was performed by silica gel column chromatography to obtain 6 parts of the compound represented by formula (1-11).

Identification: (Mass spectrometry) Ionization mode = ESI+: m/z = [M+H] ⁺ 314.2
Exact Mass: +313.2

6 parts of the compound represented by formula (1-11) and 0.2 parts of lithium hydroxide hydrate (manufactured by Wako Pure Chemical Industries, Ltd.) were dissolved in 20 parts of methanol (manufactured by Kanto Chemical Co., Ltd.), 20 parts of tetrahydrofuran (manufactured by Kanto Chemical Co., Ltd.), and 10 parts of water, and the mixture was stirred at 23°C for 1 hour. After the reaction was completed, the organic solvent was concentrated, and the organic layer was extracted with ethyl acetate, and separated and purified by silica gel column chromatography to obtain 4 parts of the compound represented by formula (1-12).

Identification: (Mass spectrometry) Ionization mode = ESI+: m/z = [M+H] ⁺ 300.2
Exact Mass: +299.2

4 parts of the compound represented by formula (1-12) and 0.8 parts of 3,4-dihydroxy-3-cyclobutene-1,2-dione (manufactured by Wako Pure Chemical Industries, Ltd.) were dissolved in 40 parts of toluene (manufactured by Kanto Chemical Co., Ltd.) and 10 parts of n-butanol (manufactured by Kanto Chemical Co., Ltd.), heated to 140°C, and stirred for 2 hours. After concentrating the solvent, separation and purification were performed by silica gel column chromatography to obtain 1.6 parts of the compound represented by formula (AI-16).

Identification: (Mass spectrometry) Ionization mode = ESI+: m/z = [M+H] ⁺ 677.3
Exact Mass: +676.3

[Colorant Synthesis Example 2]
50 parts of m-bromophenol (manufactured by Tokyo Chemical Industry Co., Ltd.) and 30 parts of imidazole (manufactured by Tokyo Chemical Industry Co., Ltd.) were dissolved in 500 parts of dichloromethane (manufactured by Kanto Chemical Co., Ltd.) and cooled to 0 ° C., and then 48 parts of tert-butyldimethylchlorosilane (manufactured by Tokyo Chemical Industry Co., Ltd.) were added dropwise. After the completion of the dropwise addition, the temperature was raised to 23 ° C. and stirred for 16 hours. After the reaction was completed, water was added to extract the organic layer, and the solvent was concentrated and then separated and purified by silica gel column chromatography to obtain 74 parts of the compound represented by formula (2-10). In the following, the structure of the compound was confirmed by mass spectrometry (LC; Agilent 1200 type, MASS; Agilent LC / MSD type).

Identification: (Mass spectrometry) Ionization mode = ESI+: m/z = [M+H] ⁺ 287.0
Exact Mass: +286.0

45 parts of 4-amino-3,5-xylenol (Tokyo Chemical Industry Co., Ltd.) was dissolved in 400 parts of tetrahydrofuran (Kanto Chemical Co., Ltd.). 127 parts of di-tert-butyl dicarbonate (Tokyo Chemical Industry Co., Ltd.) was added to this solution and dissolved. The mixture was stirred at 23°C for 16 hours to react. After the reaction was completed, the solvent was distilled off to obtain 51 parts of a crude product. The obtained crude product was stirred and purified in a mixed solvent of 90 parts of ethyl acetate (Kanto Chemical Co., Ltd.) and 272 parts of n-hexane (Kanto Chemical Co., Ltd.) at 23°C for 2 hours to obtain 47 parts of the compound represented by formula (1-33).

Identification: (Mass spectrometry) Ionization mode = ESI+: m/z = [M+H] ⁺ 238.3
Exact Mass: +237.1

20 parts of 2-bromoethanol (Tokyo Chemical Industry Co., Ltd.) was dissolved in 333 parts of dichloromethane (Kanto Chemical Co., Ltd.). 32.4 parts of triethylamine (Kanto Chemical Co., Ltd.) and 0.156 parts of 4-dimethylaminopyridine (Kanto Chemical Co., Ltd.) were added to this solution, and 28.95 parts of tert-butyldimethylsilyl chloride (Tokyo Chemical Industry Co., Ltd.) was added and dissolved while stirring. The mixture was stirred at 23°C for 16 hours to cause a reaction. The solvent was distilled off to obtain 20 parts of a crude product. The obtained crude product was separated and purified by column chromatography to obtain 20 parts of a compound represented by formula (1-34).

Identification: (Mass spectrometry) Ionization mode = ESI+: m/z = [M+H] ⁺ 239.1
Exact Mass: +238.0

47 parts of the compound represented by formula (1-33) were dissolved in 141.5 parts of the compound represented by formula (1-34) and 447 parts of dimethylformamide (Kanto Chemical Co., Ltd.). 138.2 parts of potassium carbonate (Kanto Chemical Co., Ltd.) were added to this solution and reacted with stirring at 70°C for 16 hours. After the reaction was completed, the solvent was distilled off and extraction with an organic solvent was performed to obtain 49 parts of a crude product. The obtained crude product was separated and purified by column chromatography to obtain 41 parts of the compound represented by formula (1-35).

Identification: (Mass spectrometry) Ionization mode = ESI+: m/z = [M+H-t-Bu ⁺ ] ⁺ 339.2
Exact Mass: +395.3

41 parts of the compound represented by formula (1-35) was dissolved in 424 parts of 1,4-dioxane (Kanto Chemical Co., Ltd.), and 263 parts of hydrogen chloride (about 4 mol/L 1,4-dioxane solution) (Tokyo Chemical Industry Co., Ltd.) was added and the mixture was stirred at 23°C for 1 hour to deprotect the compound. After the reaction was completed, the solvent was distilled off to obtain 36 parts of a crude product. The obtained crude product was separated and purified by column chromatography to obtain 22 parts of the compound represented by formula (1-36).

Identification: (Mass spectrometry) Ionization mode = ESI+: m/z = [M+H] ⁺ 182.2
Exact Mass: +181.1

22 parts of the compound represented by formula (1-36) were dissolved in 293 parts of dichloromethane (Kanto Chemical Co., Ltd.). 10.8 parts of imidazole (Kanto Chemical Co., Ltd.) and 22 parts of tert-butyldimethylsilyl chloride (Tokyo Chemical Industry Co., Ltd.) were added to this solution and dissolved. The mixture was stirred at 23°C for 16 hours to react. The solvent was distilled off to obtain 23 parts of a crude product. The obtained crude product was separated and purified by column chromatography to obtain 20 parts of the compound represented by formula (1-37).

Identification: (Mass spectrometry) Ionization mode = ESI+: m/z = [M+H] ⁺ 296.3
Exact Mass: +295.2

15 parts of the compound represented by formula (2-10) were dissolved in 14.5 parts of the compound represented by formula (1-37) and 130 parts of toluene (Kanto Chemical Co., Ltd.), and this solution was mixed with 5.7 parts of potassium hydroxide (Kanto Chemical Co., Ltd.), 15 parts of water, 2 parts of tetrabutylammonium bromide (Tokyo Chemical Industry Co., Ltd.), and 0.26 parts of bis(tri-tert-butylphosphine)palladium(0) (Tokyo Chemical Industry Co., Ltd.). After heating to 90°C and stirring for 20 minutes, the organic layer was extracted and the solvent was distilled off to obtain 15 parts of a crude product. The obtained crude product was separated and purified by column chromatography to obtain 12 parts of the compound represented by formula (1-38).

Identification: (Mass spectrometry) Ionization mode = ESI+: m/z = [M+H] ⁺ 502.4
Exact Mass: +501.3

12 parts of the compound represented by formula (1-38), 11.9 parts of methyl 4-chloro-4-oxobutyrate (Tokyo Chemical Industry Co., Ltd.), and 41.6 parts of toluene (Kanto Chemical Co., Ltd.) were mixed and heated at 90°C for 1 hour with stirring. After the reaction was completed, the solvent was distilled off, and the resulting crude product was separated and purified by column chromatography to obtain 5.9 parts of the compound represented by formula (1-39).

Identification: (Mass spectrometry) Ionization mode = ESI+: m/z = [M+H] ⁺ 616.3
Exact Mass: +615.3

5.9 parts of the compound represented by formula (1-39) was dissolved in 52.4 parts of tetrahydrofuran (Kanto Chemical Co., Ltd.) and cooled to 0°C, after which 11 parts of tetrabutylammonium fluoride 1M tetrahydrofuran solution (Tokyo Chemical Industry Co., Ltd.) was added dropwise, and the mixture was stirred at 23°C for 2 hours after the completion of the dropwise addition. After the reaction was completed, water was added, and the tetrahydrofuran solvent was distilled off to obtain a crude product, which was subjected to an extraction operation with an organic solvent and concentrated to obtain 4.3 parts of the compound represented by formula (1-40).

Identification: (Mass spectrometry) Ionization mode = ESI+: m/z = [M+H] ⁺ 388.2
Exact Mass: +387.2

4.3 parts of the compound represented by formula (1-40), 56.4 parts of a 1M borane tetrahydrofuran solution (Kanto Chemical Co., Ltd.), and 38.2 parts of tetrahydrofuran (Kanto Chemical Co., Ltd.) were mixed at 0°C, heated to 23°C, and stirred for 16 hours. After completion of the reaction, water was added to quench the reaction, and the mixture was extracted with an organic solvent. The solvent was distilled off, and the resulting crude product was purified by silica gel column chromatography to obtain 2.3 parts of the compound represented by formula (1-41).

Identification: (Mass spectrometry) Ionization mode = ESI+: m/z = [M+H] ⁺ 346.3
Exact Mass: +345.2

2.3 parts of the compound represented by formula (1-41) and 0.38 parts of 3,4-dihydroxy-3-cyclobutene-1,2-dione (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) were dissolved in 80 parts of toluene (manufactured by Kanto Chemical Co., Ltd.) and 19 parts of n-butanol (manufactured by Kanto Chemical Co., Ltd.), and the mixture was heated at 120°C for 4 hours with stirring. After the reaction was completed, the solvent was distilled off and the resulting crude product was separated and purified by silica gel column chromatography to obtain 1.3 parts of the compound represented by formula (AI-15).

Identification: (Mass spectrometry) Ionization mode = ESI+: m/z = [M+H] ⁺ 769.8
Exact Mass: +768.4

[Resin synthesis example]
A suitable amount of nitrogen was flowed into a flask equipped with a reflux condenser, a dropping funnel and a stirrer to replace the atmosphere with nitrogen, 280 parts of propylene glycol monomethyl ether acetate was added, and the mixture was heated to 80°C while stirring. Next, a mixed solution of 38 parts of acrylic acid, 289 parts of a mixture of 3,4-epoxytricyclo[5.2.1.0 ^2,6 ]decan-8-yl acrylate and 3,4-epoxytricyclo[5.2.1.0 ^2,6 ]decan-9-yl acrylate (mixing ratio 1:1), and 125 parts of propylene glycol monomethyl ether acetate was added dropwise over 5 hours. Meanwhile, a mixed solution of 33 parts of 2,2-azobis(2,4-dimethylvaleronitrile) dissolved in 235 parts of propylene glycol monomethyl ether acetate was added dropwise over 6 hours. After the dropwise addition was completed, the flask was kept at 80°C for 4 hours and then cooled to room temperature to obtain a copolymer (resin (B-1)) solution having a B-type viscosity (23°C) of 125 mPa·s and a solid content of 35.1%. The weight average molecular weight Mw of the produced copolymer was 9200, the polydispersity was 2.08, and the acid value of the solid content was 77 mg-KOH/g. Resin (B-1) has the following structural units.

[Preparation Example 1: Preparation of Dispersion 1]
5.0 parts of the compound represented by formula (AI-16) (colorant (A-1)), 1.5 parts of dispersant (P-1) (solid content), 4.0 parts of resin (B-1) (solid content), and 89.5 parts of solvent (E-1) were weighed, and then 300 parts of 0.2 μm zirconia beads were added. The mixture was shaken for 1 hour using a paint conditioner (manufactured by LAU), and the zirconia beads were removed by filtration to prepare dispersion 1.

[Preparation Example 2: Preparation of Dispersion 2]
Dispersion 2 was prepared in the same manner as in Preparation Example 1, except that the solid content of the dispersant (P-1) was changed to 0.5 parts and the solvent (E-1) was changed to 90.5 parts.

[Preparation Example 3: Preparation of Dispersion 3]
Dispersion 3 was prepared in the same manner as in Preparation Example 1, except that 1.5 parts of the solid content of Dispersant (P-1) was replaced with 1.5 parts of the solid content of Dispersant (P-2).

[Preparation Example 4: Preparation of Dispersion 4]
Dispersion 4 was prepared in the same manner as in Preparation Example 1, except that 1.5 parts of the solid content of dispersant (P-1) was replaced with 0.5 parts of the solid content of dispersant (P-2) and 89.5 parts of solvent (E-1) was replaced with 90.5 parts of solvent (E-1).

[Preparation Example 5: Preparation of Dispersion 5]
Dispersion 5 was prepared in the same manner as in Preparation Example 1, except that 1.5 parts of the solid content of Dispersant (P-1) was replaced with 1.5 parts of the solid content of Dispersant (P-3).

[Preparation Example 6: Preparation of Dispersion 6]
Dispersion 6 was prepared in the same manner as in Preparation Example 1, except that 1.5 parts of the solid content of dispersant (P-1) was replaced with 0.5 parts of the solid content of dispersant (P-3) and 89.5 parts of solvent (E-1) was replaced with 90.5 parts of solvent (E-1).

[Preparation Example 7: Preparation of Dispersion 7]
Dispersion liquid 7 was prepared in the same manner as in Preparation Example 1, except that 5.0 parts of colorant (A-1) was replaced with 5.0 parts of colorant (A-2), 1.5 parts of dispersant (P-1) was replaced with 5.0 parts of dispersant (P-1), 89.5 parts of solvent (E-1) was replaced with 76.0 parts of solvent (E-1), and 10 parts of solvent (E-2).

[Preparation Example 8: Preparation of Dispersion 8]
Dispersion liquid 8 was prepared in the same manner as in Preparation Example 1, except that 5.0 parts of colorant (A-1) was changed to 5.0 parts of colorant (A-2), 1.5 parts of dispersant (P-1) was changed to 2.5 parts of dispersant (P-1), 89.5 parts of solvent (E-1) was changed to 78.5 parts of solvent (E-1), and 10 parts of solvent (E-2).

[Preparation Example 9: Preparation of Dispersion 9]
Dispersion liquid 9 was prepared in the same manner as in Preparation Example 1, except that 5.0 parts of colorant (A-1) was replaced with 5.0 parts of colorant (A-2), 89.5 parts of solvent (E-1) was replaced with 79.5 parts of solvent (E-1), and 10 parts of solvent (E-2).

[Preparation Example 10: Preparation of Dispersion 10]
Dispersion 10 was prepared in the same manner as in Preparation Example 1, except that 5.0 parts of colorant (A-1) was replaced with 5.0 parts of colorant (A-2), 1.5 parts of dispersant (P-1) was replaced with 0.5 parts of dispersant (P-1), 89.5 parts of solvent (E-1) was replaced with 80.5 parts of solvent (E-1), and 10 parts of solvent (E-2).

[Examples 1 to 14, Comparative Example 1]
[Preparation of Colored Curable Resin Composition]
Colored curable resin compositions were obtained by mixing each of the dispersions 1 to 10, the resin (B), the polymerizable compound (C), the polymerization initiator (D), the solvent (E), and the leveling agent (F) so as to obtain the compositions shown in Table 4 (dispersion 1 was used in Example 1, and dispersions 2 to 10 were similarly used in each of Examples 2 to 10). In Table 4, the unit of the content of each component is "parts".
In Examples 11 to 14 and Comparative Example 1, a colored curable resin composition was prepared by mixing the colorant (A), the resin (B), the polymerizable compound (C), the polymerization initiator (D), the solvent (E), the leveling agent (F), and, if necessary, the dispersant (P), without using a dispersion liquid.

In Table 4, each component represents the following compound (* indicates the amount carried over from the dispersion liquid).
Colorant (A): (A-1): Compound represented by formula (AI-16) Colorant (A): (A-2): Compound represented by formula (AI-15) Dispersant (P): Dispersant (P-1): Acrylic dispersant (amine value 1 mgKOH/g, having a tertiary amino group)
Dispersant (P): Dispersant (P-2) Acrylic dispersant (amine value 14 mg KOH/g, having a tertiary amino group)
Dispersant (P): Dispersant (P-3) Acrylic dispersant (amine value 28 mg KOH/g, having a tertiary amino group)
Resin (B): Resin (B-1) (solid content conversion)
Polymerizable compound (C): (C-1): Dipentaerythritol hexaacrylate (KAYARAD (registered trademark) DPHA; manufactured by Nippon Kayaku Co., Ltd.)
Polymerization initiator (D): (D-1): N-acetyloxy-1-(4-phenylsulfanylphenyl)-3-cyclohexylpropan-1-one-2-imine (PBG-327; O-acyloxime compound; manufactured by Changzhou Strong Electronic New Materials Co., Ltd.)
Solvent (E): (E-1): Propylene glycol monomethyl ether acetate Solvent (E): (E-2): 4-hydroxy-4-methyl-2-pentanone Leveling agent (F): (F-1): Polyether modified silicone oil (Toray Silicone SH8400 manufactured by Dow Corning Toray Co., Ltd.)

[Preparation of colored coating film (color filter)]
A colored curable resin composition was applied by spin coating onto a 5 cm square glass substrate (Eagle 2000; Corning) so that the film thickness after post-baking was 2.0 μm, and then pre-baked at 100 ° C. for 3 minutes to form a colored composition layer. After cooling, the colored composition layer was irradiated with light at an exposure dose of 100 mJ / cm ² (based on 365 nm) in an air atmosphere using an exposure machine (TME-150RSK; Topcon Corporation). Thereafter, post-baking was performed in an oven at 230 ° C. for 30 minutes to obtain a color filter.

[evaluation]
1. Anti-fading property (ΔE*ab)
Chromaticity was measured before pre-baking and after post-baking, and the spectrum was measured using a colorimeter (OSP-SP-200; manufactured by Olympus Corporation). The characteristic function of C light source was used to measure the xy chromaticity coordinates (x, y) and the stimulus value Y in the CIE XYZ color system. From the measured values, the color difference ΔE*ab was calculated according to the method described in JIS Z 8730:2009 (7. Calculation method of color difference), and the results are shown in Table 4. The smaller ΔE*ab means the smaller the color change (the higher the heat resistance).

2. Absorbance Retention Rate After pre-baking and after post-baking, the maximum absorbance in the visible light region was determined from the spectrum measured using a colorimeter (OSP-SP-200; manufactured by Olympus Corporation), and the maximum absorbance retention rate was calculated according to the following formula. The results are shown in Table 4.
Absorbance retention (ΔAbs.Max)=maximum absorbance after post-bake/maximum absorbance after pre-bake A higher absorbance retention means higher suitability for the film formation process.

3. Contrast The contrast of the color filter after post-baking was measured using a contrast meter (CT-1; manufactured by Tsubosaka Electric Co., Ltd., color difference meter BM-5A; manufactured by Topcon Corporation, light source; F-10, polarizing film; manufactured by Tsubosaka Electric Co., Ltd.) with a blank value of 30,000. If the contrast in the colored coating film is high, it can be said that the colored pattern also has a high contrast. The results are shown in Table 4.

In comparison with Comparative Example 1, Examples 1 to 14 have lower ΔE*ab and exhibit anti-fading properties.
On the other hand, when comparing Examples 2 and 11, Examples 3 and 12, Examples 4 and 13, and Examples 6 and 14 with and without a colorant dispersion, it can be seen that when a colorant dispersion is used, one or more of the anti-fading properties, absorbance retention, and contrast are further improved.

The present invention provides a colored curable resin composition capable of forming a colored coating film that is prevented from fading (preferably with improved absorbance retention and/or contrast), and is therefore useful as a colored curable resin composition for use in color filters for display devices and solid-state imaging devices.

Claims (9)

The composition includes a colorant, a dispersant, a resin, a polymerizable compound, a polymerization initiator, and a solvent.
the colorant comprises a squarylium dye having a maximum absorption in the visible light region;
The amine value of the dispersant is more than 0 mgKOH/g and not more than 30 mgKOH/g;
The colored curable resin composition , wherein the squarylium dye is a compound represented by formula (AII) :

[In formula (AII),
R ¹ to R ⁴ each independently represent a hydrogen atom, a halogen atom, a hydroxyl group, or a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms which may have a substituent. A methylene group constituting the monovalent saturated hydrocarbon group may be substituted with -O- or -S-.
R ⁵ to R ⁸ each independently represent a hydrogen atom or a hydroxy group.
Ar ¹ and Ar ² each independently represent a group represented by formula (i).

[In formula (i),
R ¹² represents a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms which may have a hydroxyl group or a carboxyl group, and m represents an integer of 0 to 5. A methylene group constituting the monovalent saturated hydrocarbon group may be substituted with -O- or -S-. When m is 2 or more, the multiple R ¹² 's may be the same or different. * represents a bond to a nitrogen atom.]
R ¹³ and R ¹⁴ each independently represent a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms and having a hydroxyl group or a carboxyl group, and a methylene group constituting the monovalent saturated hydrocarbon group may be substituted with -O- or -S-.] 2. The colored curable resin composition according to claim 1, wherein the colored curable resin composition does not contain a hindered phenol-based antioxidant or pentaerythritol tetrakis(3-mercaptobutyrate). The colored curable resin composition according to claim 1 or 2, wherein the dispersant has an amine value of 28 mgKOH/g or less. The colored curable resin composition according to any one of claims 1 to 3, wherein the dispersant has a basic functional group of a tertiary amino group or a nitrogen-containing heterocycle. The colored curable resin composition according to any one of claims 1 to 4, wherein the content of the dispersant is 0.1 parts by mass or more and 50 parts by mass or less per 100 parts by mass of the colorant. The colored curable resin composition according to any one of claims 1 to 5, comprising a dispersion in which the colorant is dispersed in a solvent by the dispersant. A color filter formed from the colored curable resin composition according to any one of claims 1 to 6. A liquid crystal display device including the color filter according to claim 7. The method includes a step of obtaining a dispersion liquid in which a colorant is dispersed in a solvent by a dispersant, and a step of adding a resin, a polymerizable compound, and a polymerization initiator to the dispersion liquid,
the colorant comprises a squarylium dye having a maximum absorption in the visible light region;
The amine value of the dispersant is more than 0 mgKOH/g and not more than 30 mgKOH/g;
The method for producing a colored curable resin composition , wherein the squarylium dye is a compound represented by formula (AII) :

[In formula (AII),
R ¹ to R ⁴ each independently represent a hydrogen atom, a halogen atom, a hydroxyl group, or a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms which may have a substituent. A methylene group constituting the monovalent saturated hydrocarbon group may be substituted with -O- or -S-.
R ⁵ to R ⁸ each independently represent a hydrogen atom or a hydroxy group.
Ar ¹ and Ar ² each independently represent a group represented by formula (i).

[In formula (i),
R ¹² represents a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms which may have a hydroxyl group or a carboxyl group, and m represents an integer of 0 to 5. A methylene group constituting the monovalent saturated hydrocarbon group may be substituted with -O- or -S-. When m is 2 or more, the multiple R ¹² 's may be the same or different. * represents a bond to a nitrogen atom.]
R ¹³ and R ¹⁴ each independently represent a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms and having a hydroxyl group or a carboxyl group, and a methylene group constituting the monovalent saturated hydrocarbon group may be substituted with -O- or -S-.]