JP5760596B2 - Coloring composition for color filter, and color filter - Google Patents

Description

  The present invention relates to a color liquid crystal display device, a color composition for a color filter used for producing a color filter used for a color image pickup tube element, and the like, and a color filter including a filter segment formed using the same. It is.

  In the liquid crystal display device, a liquid crystal layer sandwiched between two polarizing plates controls the amount of light passing through the first polarizing plate by controlling the degree of polarization of light passing through the first polarizing plate. The type using twisted nematic (TN) type liquid crystal is the mainstream. By providing a color filter between the two polarizing plates, color display becomes possible, and since it has recently been used in televisions and personal computer monitors, it has higher brightness, higher contrast, The demand for color reproducibility is increasing.

  A color filter is a surface of a transparent substrate such as glass, in which two or more kinds of fine band (striped) filter segments of different hues are arranged in parallel or crossing each other, or fine filter segments are arranged vertically and horizontally. It is made up of those arranged in In general, it is often formed from filter segments of three colors of red, green, and blue. Each of these segments is as fine as several microns to several hundred microns, and is arranged in a predetermined arrangement for each hue. ing.

  Generally, in a color liquid crystal display device, a transparent electrode for driving a liquid crystal is formed on a color filter by vapor deposition or sputtering, and an alignment film for aligning the liquid crystal in a certain direction is further formed thereon. Yes. In order to sufficiently obtain the performance of these transparent electrodes and alignment films, a high temperature treatment of generally 200 ° C. or higher, preferably 230 ° C. or higher is required in the production process for forming the color filter. Therefore, at present, a method called a pigment dispersion method using a pigment having excellent light resistance and heat resistance as a colorant is mainly used for color filters.

  In the pigment dispersion method, for the red filter segment, a pigment having excellent light resistance and heat resistance such as a diketopyrrolopyrrole pigment, anthraquinone pigment, perylene pigment or disazo pigment as a colorant may be used alone or in combination. Is common.

  Among these, as diketopyrrolopyrrole pigments, C.I. I. Pigment Red 254 is known to be a pigment particularly excellent in lightness, and brominated diketopyrrolopyrrole pigments and the like are being studied as new pigments. (See Patent Documents 1 to 4).

  In recent years, there has been a strong demand for high brightness and high contrast for color filters, and these diketopyrrolopyrrole pigments are often used as finely as possible. However, since the diketopyrrolopyrrole pigments that have been refined have the property of being easy to grow crystals due to their intermolecular hydrogen bonds, crystallization occurs in the heating process when forming the color filter, and foreign matter is generated. Is a problem. Therefore, there is a limit to the improvement in brightness and contrast ratio due to miniaturization of diketopyrrolopyrrole pigments, and in addition, heat resistance is also an issue.

International Publication No. 2009/081930 Pamphlet JP 2009-149707 A JP 1999-231516 A International Publication No. 2009/144115 Pamphlet

  The problem to be solved by the present invention is high brightness and high contrast ratio, and not only does crystal precipitation of the diketopyrrolopyrrole pigment occur even in the heating process, but also when used as a photosensitive coloring composition Includes a color filter coloring composition that provides a good balance of performance necessary for forming good filter segments such as sensitivity and linearity, and a high-definition color filter that uses the same and has excellent brightness and contrast ratio. Is to provide.

  As a result of intensive studies, the present inventors have found that C.I. I. By using a coloring composition containing a brominated diketopyrrolopyrrole pigment and an alkali-soluble photosensitive resin instead of Pigment Red 254 (chlorinated diketopyrrolopyrrole pigment), high brightness, high contrast ratio, and heating process The inventors have found that a color filter having a high-definition filter segment in which crystal precipitation is suppressed is obtained, and the present invention has been achieved.

また、本発明は、顔料（Ａ）が、さらに顔料（Ａ１）以外のジケトピロロピロール系顔料、アゾ系顔料、アントラキノン系顔料、ペリレン系顔料、キナクリドン系顔料、ベンズイミダゾロン系顔料、およびキノリン系顔料からなる群より選ばれる少なくとも１種類以上を含むことを特徴とする前記カラーフィルタ用着色組成物に関する。 That is, the present invention is a color filter coloring composition comprising a pigment (A), a binder resin (B), and a solvent, wherein the pigment (A) comprises the pigment (A1) represented by the formula (1). The binder resin (B) includes an alkali-soluble photosensitive resin (B1).
Formula (1):

In the present invention, the pigment (A) is a diketopyrrolopyrrole pigment other than the pigment (A1), an azo pigment, an anthraquinone pigment, a perylene pigment, a quinacridone pigment, a benzimidazolone pigment, and a quinoline. The color composition for color filters, comprising at least one selected from the group consisting of pigments.

  The present invention further includes at least one photopolymerization initiator (D) selected from the group consisting of acetophenone compounds, phosphine compounds, imidazole compounds, and oxime ester compounds. The present invention relates to a coloring composition for a color filter.

  The present invention also relates to a color filter comprising a filter segment formed on the substrate from the color filter coloring composition.

  According to the present invention, there are provided a color composition for a color filter having a high brightness and a high contrast ratio, in which crystal precipitation of a diketopyrrolopyrrole pigment does not occur even in a heating process, and a color filter using the same. Can do.

First, various components of the coloring composition for a color filter of the present invention will be described.
In the present application, when expressed as “(meth) acrylate”, “(meth) acrylic acid”, or “(meth) acrylamide”, unless otherwise specified, “acrylate and / or methacrylate”, It shall represent “acrylic acid and / or methacrylic acid” or “acrylamide and / or methacrylamide”.

Further, “CI” mentioned below means a color index (CI).
Hereinafter, the present invention will be described in detail.

<Pigment (A)>
The pigment (A) of the present invention includes the pigment (A1) represented by the formula (1).
<< Pigment (A1) >>
Formula (1):

  The brominated diketopyrrolopyrrole pigment which is the pigment (A1) represented by the formula (1) can be obtained by using a known method described in International Publication No. 2009/144115 pamphlet or the like.

  As an example of the production method, it can be produced by a succinic acid diester synthesis method or the like. That is, 2 moles of 4-bromobenzonitrile per mole of succinic acid diester in an inert organic solvent such as tert-amyl alcohol in the presence of an alkali metal or an alkali metal alkoxide at a high temperature of 80 to 110 ° C. Performing a condensation reaction to produce an alkali metal salt of a diketopyrrolopyrrole compound, and then protonating the alkali metal salt of the diketopyrrolopyrrole compound with water, alcohol, acid, etc. Brominated diketopyrrolopyrrole pigments can be obtained. At this time, the size of the primary particle diameter obtained can be controlled by the temperature in protonation, the type, ratio and amount of water, alcohol or acid. The production method of the brominated diketopyrrolopyrrole pigment is not limited to this method.

  By using the pigment (A1) represented by the formula (1), it is possible to obtain a red coloring composition having higher brightness and higher contrast ratio than before.

《Other pigments》
The coloring composition of the present invention may be used in combination with a pigment other than the pigment (A1). As such a pigment, an organic or inorganic pigment may be used alone or in combination of two or more. Among the pigments, pigments having high color developability and high heat resistance are preferable, and organic pigments are usually used.

  Examples of organic pigments that can be used include diketopyrrolopyrrole pigments other than pigment (A1); azo pigments such as azo, disazo and polyazo; phthalocyanine types such as copper phthalocyanine, halogenated copper phthalocyanine, and metal-free phthalocyanine Pigments; Anthraquinone pigments such as aminoanthraquinone, diaminodianthraquinone, anthrapyrimidine, flavantron, anthanthrone, indanthrone, pyranthrone, violanthrone; quinacridone pigment; dioxazine pigment; perinone pigment; perylene pigment; thiaindigo pigment; Examples thereof include isoindoline pigments; isoindolinone pigments; quinophthalone pigments; selenium pigments; metal complex pigments.

  Among these pigments, from the group consisting of diketopyrrolopyrrole pigments other than pigment (A1), azo pigments, anthraquinone pigments, perylene pigments, quinacridone pigments, benzimidazolone pigments, and quinoline pigments. It is preferable to include at least one or more selected. Similar to the pigment (A1), these are red pigments, which facilitate color adjustment by adjusting the blending ratio, and are preferable because they are excellent in light resistance and heat resistance.

  In the present invention, specific examples of pigments that can be used when forming pixels of a color filter are shown.

  Examples of red pigments include C.I. I. Pigment Red 1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 14, 15, 16, 17, 21, 22, 23, 31, 32, 37, 38, 41, 47, 48, 48: 1, 48: 2, 48: 3, 48: 4, 49, 49: 1, 49: 2, 50: 1, 52: 1, 52: 2, 53, 53: 1, 53: 2, 53: 3, 57, 57: 1, 57: 2, 58: 4, 60, 63, 63: 1, 63: 2, 64, 64: 1, 68, 69, 81, 81: 1, 81: 2, 81: 3, 81: 4, 83, 88, 90: 1, 101, 101: 1, 104, 108, 108: 1, 109, 112, 113, 114, 122, 123, 144, 146, 147, 149, 151 166, 168, 169, 170, 172, 173, 174, 175, 176, 177, 178, 1 9, 181, 184, 185, 187, 188, 190, 193, 194, 200, 202, 206, 207, 208, 209, 210, 214, 216, 220, 221, 224, 230, 231, 232, 233, 235, 236, 237, 238, 239, 242, 243, 245, 247, 249, 250, 251, 253, 254, 255, 256, 257, 258, 259, 260, 262, 263, 264, 265, 266, 267, 268, 269, 270, 271, 272, 273, 274, 275, 276, and the like.

  Among these, in order to exert an excellent effect of brightness and contrast ratio, C.I. I. Pigment Red 48: 1, 122, 168, 177, 202, 206, 207, 209, 224, 242, or 254, more preferably C.I. I. Pigment Red 177, 209, 224, 242, or 254.

  Examples of yellow pigments include C.I. I. Pigment Yellow 1, 1: 1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 14, 16, 17, 24, 31, 32, 34, 35, 35: 1, 36, 36: 1, 37, 37: 1, 40, 41, 42, 43, 48, 53, 55, 61, 62, 62: 1, 63, 65, 73, 74, 75, 81, 83, 87, 93, 94, 95, 97, 100, 101, 104, 105, 108, 109, 110, 111, 116, 117, 119, 120, 126, 127, 127: 1, 128, 129, 133, 134, 136, 138, 139, 142, 147, 148, 150, 151, 153, 154, 155, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 172, 17 174, 175, 176, 180, 181, 182, 183, 184, 185, 188, 189, 190, 191, 191: 1, 192, 193, 194, 195, 196, 197, 198, 199, 200, 202 , 203, 204, 205, 206, 207, 208, and the like.

  Among these, in order to exert an excellent effect of brightness and contrast, C.I. I. Pigment Yellow 83, 117, 129, 138, 139, 150, 154, 155, 180, or 185, more preferably C.I. I. Pigment yellow 83, 138, 139, 150, or 180.

  Examples of orange pigments include C.I. I. Pigment Orange 1, 2, 5, 13, 16, 17, 19, 20, 21, 22, 23, 24, 34, 36, 38, 39, 43, 46, 48, 49, 61, 62, 64, 65, 67, 68, 69, 70, 71, 72, 73, 74, 75, 77, 78, 79 and the like.

  Among these, in order to exert an excellent effect of brightness and contrast, C.I. I. Pigment Orange 38 or 71.

  Also, inorganic pigments include barium sulfate, zinc white, lead sulfate, yellow lead, zinc yellow, red bean (red iron (III) oxide), cadmium red, ultramarine, bitumen, chromium oxide green, cobalt green, amber, titanium black. Examples thereof include metal oxide powders such as synthetic iron black, titanium oxide, and iron tetroxide, metal sulfide powders, and metal powders. Inorganic pigments are used in combination with organic pigments in order to ensure good coatability, sensitivity, developability and the like while maintaining a balance between saturation and lightness.

  When using together with the said red pigment or yellow pigment, content of the pigment (A1) shown by Formula (1) is 40 to 100 weight% in the total of 100 weight% of a pigment (A), Preferably it is 50 to 100 weight% %, More preferably 60 to 100% by weight. By being in this content range, the color characteristics of the pigment (A1) represented by the formula (1) can be sufficiently exhibited.

  The content of the pigment (A) component is preferably 10% by weight or more, more preferably 15% by weight or more from the viewpoint of obtaining sufficient color reproducibility in 100% by weight of the total nonvolatile components of the colored composition of the present invention. Yes, and most preferably 20% by weight or more. Further, since the stability of the coloring composition is improved, the content of the preferred pigment (A) component is 90% by weight or less, more preferably 80% by weight or less, and most preferably 70% by weight or less. is there.

  The photosensitive coloring composition of the present invention may further contain a dye within a range that does not decrease the heat resistance for color matching.

<Refining pigments>
The pigment (A1) and other pigments of the present invention are preferably used after being refined.
The primary particle size of the refined pigment is preferably 20 nm or more because of good dispersion in the colorant carrier. Moreover, since it can form a filter segment with high contrast ratio, it is preferable that it is 100 nm or less. A particularly preferable range is a range of 25 to 85 nm.

  The primary particle diameter of the pigment was measured by directly measuring the size of the primary particle from an electron micrograph of the pigment using a TEM (transmission electron microscope). Specifically, the minor axis diameter and major axis diameter of the primary particles of each pigment were measured, and the average was taken as the particle diameter of the pigment particles. Next, for 100 or more pigment particles, the volume of each particle is approximated to a cube having the obtained particle diameter to obtain an average volume, and the length of one side of the cube having this average volume is determined as the average primary The particle size.

The specific surface area by the BET method of finely divided pigment is preferably 60m ² / g~130m ² / g.

  When the specific surface area of the pigment (A) is smaller than the lower limit value, the luminance and contrast ratio of the color filter are lowered. When the specific surface area is larger than the upper limit value, it is difficult to disperse the pigment, and it becomes difficult to maintain the stability as the colored composition and ensure the fluidity. As a result, the luminance and contrast ratio characteristics of the color filter deteriorate.

  As a means for controlling the specific surface area of the pigment, a method of controlling the specific surface area by mechanically pulverizing the pigment (referred to as a grinding method), a solution dissolved in a good solvent is introduced into a poor solvent, and a desired specific surface area of the pigment is controlled. There are a method of precipitating a pigment (referred to as a precipitation method), a method of producing a pigment having a desired specific surface area at the time of synthesis (referred to as a synthetic precipitation method), and the like. Depending on the synthesis method and chemical properties of the pigment to be used, an appropriate method can be selected for each pigment. Any of the above methods may be used as a method for controlling the specific surface area of the pigment contained in the colored composition of the present invention.

  The pigment used in the present invention is preferably refined by a salt milling process among the grinding methods. By using such a pigment, a filter segment having a higher contrast ratio can be formed. Salt milling is a process of heating a mixture of pigment, water-soluble inorganic salt and water-soluble organic solvent using a kneader such as a kneader, trimix, two-roll mill, three-roll mill, ball mill, attritor or sand mill. Then, after mechanically kneading, the water-soluble inorganic salt and the water-soluble organic solvent are removed by washing with water. The water-soluble inorganic salt serves as a crushing aid, and the pigment is crushed using the high hardness of the inorganic salt during salt milling. By optimizing the conditions for salt milling the pigment, it is possible to obtain a pigment having a sharp particle size distribution with a very fine primary particle diameter and a wide distribution range.

  As the water-soluble inorganic salt, sodium chloride, barium chloride, potassium chloride, sodium sulfate and the like can be used, but sodium chloride (salt) is preferably used from the viewpoint of cost. The water-soluble inorganic salt is preferably used in an amount of 50 to 2000 parts by weight, and most preferably 300 to 1000 parts by weight with respect to 100 parts by weight of the pigment, from the viewpoint of both processing efficiency and production efficiency.

  The water-soluble organic solvent functions to wet the pigment and the water-soluble inorganic salt, and is not particularly limited as long as it dissolves (mixes) in water and does not substantially dissolve the inorganic salt to be used. However, a high boiling point solvent having a boiling point of 120 ° C. or higher is preferable from the viewpoint of safety because the temperature rises during salt milling and the solvent is easily evaporated. For example, 2-methoxyethanol, 2-butoxyethanol, 2- (isopentyloxy) ethanol, 2- (hexyloxy) ethanol, diethylene glycol, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, triethylene glycol, triethylene glycol monomethyl ether, Liquid polyethylene glycol, 1-methoxy-2-propanol, 1-ethoxy-2-propanol, dipropylene glycol, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, liquid polypropylene glycol and the like are used. The water-soluble organic solvent is preferably used in an amount of 5 to 1000 parts by weight, and most preferably 50 to 500 parts by weight, based on 100 parts by weight of the pigment.

  When the salt is milled, a resin may be added as necessary. The type of resin used is not particularly limited, and natural resins, modified natural resins, synthetic resins, synthetic resins modified with natural resins, and the like can be used. The resin used is solid at room temperature, preferably insoluble in water, and more preferably partially soluble in the organic solvent. The amount of the resin used is preferably in the range of 5 to 200 parts by weight with respect to 100 parts by weight of the pigment.

<Binder resin (B)>
The binder resin (B) in the present invention disperses the colorant (a) and contains an alkali-soluble photosensitive resin (B1).
(Alkali-soluble photosensitive resin (B1))
Examples of the alkali-soluble photosensitive resin (B1) in the present invention include resins in which an ethylenically unsaturated double bond is introduced by the following methods (i) and (ii).

[Method (i)]
As the method (i), for example, a side chain epoxy group of a copolymer obtained by copolymerizing an ethylenically unsaturated monomer having an epoxy group and one or more other monomers is used. Then, the carboxyl group of an unsaturated monobasic acid having an ethylenically unsaturated double bond is subjected to an addition reaction, and the resulting hydroxyl group is reacted with a polybasic acid anhydride to introduce an ethylenically unsaturated double bond. There is a method of introducing a carboxyl group having the function of a functional resin and having an alkali-soluble function.

Examples of the ethylenically unsaturated monomer having an epoxy group include glycidyl (meth) acrylate, methyl glycidyl (meth) acrylate, and 2-glycidoxyethyl (meth).
An acrylate, 3,4 epoxy butyl (meth) acrylate, and 3,4 epoxy cyclohexyl (meth) acrylate are mentioned, These may be used independently or may use 2 or more types together. From the viewpoint of reactivity with the unsaturated monobasic acid in the next step, glycidyl (meth)
Acrylate is preferred.

Examples of unsaturated monobasic acids include (meth) acrylic acid, crotonic acid, o-, m-, p-vinylbenzoic acid, α-haloalkyl of (meth) acrylic acid, alkoxyl, halogen, nitro, cyano substituted products, etc. Monocarboxylic acid etc. are mentioned, These may be used independently or may use 2 or more types together.

Examples of the polybasic acid anhydride include tetrahydrophthalic anhydride, phthalic anhydride, hexahydrophthalic anhydride, succinic anhydride, maleic anhydride and the like.
More than one type may be used together. If necessary, use a tricarboxylic anhydride such as trimellitic anhydride or a tetracarboxylic dianhydride such as pyromellitic dianhydride to increase the number of carboxyl groups. The group can be hydrolyzed. Moreover, when an etrahydrophthalic anhydride or maleic anhydride having an ethylenically unsaturated double bond is used as the polybasic acid anhydride, the ethylenically unsaturated double bonds can be further increased.

  As a method similar to the method (i), for example, a side chain of a copolymer obtained by copolymerizing an ethylenically unsaturated monomer having a carboxyl group and one or more other monomers. There is a method in which an ethylenically unsaturated monomer having an epoxy group is added to a part of a carboxyl group to introduce an ethylenically unsaturated double bond and a carboxyl group.

[Method (ii)]
As the method (ii), an ethylenically unsaturated monomer having a hydroxyl group is used, and a monomer of an unsaturated monobasic acid having another carboxyl group or another monomer is copolymerized. There is a method of reacting an isocyanate group of an ethylenically unsaturated monomer having an isocyanate group with the side chain hydroxyl group of the obtained copolymer.

Examples of the ethylenically unsaturated monomer having a hydroxyl group include 2-hydroxyethyl (meth) acrylate, 2- or 3-hydroxypropyl (meth) acrylate, 2- or 3
-Hydroxyalkyl (meth) acrylates such as 4-hydroxybutyl (meth) acrylate, glycerol (meth) acrylate, or cyclohexanedimethanol mono (meth) acrylate may be mentioned. The above may be used in combination. Further, polyether mono (meth) acrylate obtained by addition polymerization of ethylene oxide, propylene oxide, and / or butylene oxide to the above hydroxyalkyl (meth) acrylate, (poly) γ-valerolactone, (poly) ε-caprolactone And / or (poly) 12-hydroxystearic acid added (poly) ester mono (meth) acrylate can also be used. From the viewpoint of suppressing foreign matter on the coating film, 2-hydroxyethyl (meth) acrylate or glycerol (meth) acrylate is preferable.

Examples of the ethylenically unsaturated monomer having an isocyanate group include 2- (meth) acryloyloxyethyl isocyanate, 1,1-bis [(meth) acryloyloxy] ethyl isocyanate, and the like. In addition, two or more types can be used in combination.

Examples of the alkali-soluble photosensitive resin (B1) include unsaturated monocarboxylic acids such as (meth) acrylic acid, crotonic acid, or α-chloroacrylic acid, and carboxyls such as unsaturated dicarboxylic acids such as maleic acid or fumaric acid. And a resin containing a group and having an ethylenically unsaturated double bond. Other ethylenically unsaturated monomers which is a precursor of the alkali-soluble photosensitive resin (B1), methyl (meth) A acrylate, ethyl (meth) acrylate, n- propyl (meth) acrylate, isopropyl (meth ) Acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, s-butyl (meth) acrylate, t-butyl (meth) acrylate, pentyl (meth) acrylate, isopentyl acrylate, neopentyl (meth) acrylate, t-pentyl (Meth) acrylate, 1-methylbutyl (meth) acrylate, hexyl (meth) acrylate, hepta (meth) acrylate, octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, lauryl (meth) acrylate, cetyl (meth) acrylate Examples include alkylate or alkenyl (meth) acrylates such as relate, stearyl (meth) acrylate, isostearyl (meth) acrylate, cyclohexyl (meth) acrylate, allyl (meth) acrylate, or oleyl (meth) acrylate, depending on the purpose In addition, other ethylenically unsaturated monomers can be selected without being limited to these, and two or more types can be used in combination. Among them from the viewpoints of pigment dispersibility, methyl (meth) chestnut rate, or ethyl (meth) acrylate.

  The weight average molecular weight (Mw) of the alkali-soluble photosensitive resin (B1) is preferably in the range of 5,000 to 100,000, more preferably in the range of 5,000 to 80,000, still more preferably 5, It is in the range of 000 to 30,000. The number average molecular weight (Mn) is preferably in the range of 5,000 to 50,000, and the value of Mw / Mn is preferably 10 or less.

  When the weight average molecular weight (Mw) of the alkali-soluble photosensitive resin (B1) exceeds 100,000, the interaction between the resins becomes strong, and the viscosity of the color composition for color filter becomes high, so that the handling tends to be difficult. Further, if the weight average molecular weight (Mw) is less than 5,000, problems may occur in developability and adhesion to a substrate such as glass.

  The acid value of the alkali-soluble photosensitive resin (B1) is preferably a resin having an acid value of 20 to 300 KOH-mg / g from the viewpoints of pigment dispersibility, penetrability, developability, and resistance. When the acid value is less than 20 KOH-mg / g, the solubility in the developer is poor and it is difficult to form a fine pattern. If it exceeds 300 KOH-mg / g, a fine pattern may not remain.

  The content of the alkali-soluble photosensitive resin (B1) is preferably 10 to 100% by weight, more preferably 20 to 100% by weight, still more preferably 40 to 100% by weight, in the total 100% by weight of the binder resin (B). It is. If the content of the alkali-soluble photosensitive resin (B1) in the binder resin (B) is 10% by weight or more, it is preferable because the effects of high brightness and high contrast ratio of the colored composition can be easily obtained. .

The binder resin (B) in this invention can also contain other resins other than alkali-soluble photosensitive resin (B1).
The other resin is preferably a resin having a transmittance of preferably 80% or more, more preferably 95% or more in the entire wavelength region of 400 to 700 nm in the visible light region. For example, there are a thermoplastic resin and a thermosetting resin, and these can be used alone or in combination of two or more. Moreover, when using the coloring composition of this invention with the form of an alkali image development type | mold coloring resist material, it is preferable to use the alkali-soluble resin which copolymerized the acidic group containing ethylenically unsaturated monomer.

  Examples of the thermoplastic resin include butyral resin, styrene-maleic acid copolymer, chlorinated polyethylene, chlorinated polypropylene, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, polyvinyl acetate, polyurethane resin, and polyester resin. , Acrylic resins, alkyd resins, polystyrene, polyamide resins, rubber resins, cyclized rubber resins, celluloses, polyethylene, polybutadiene, polyimide resins, and the like. Examples of the thermosetting resin include epoxy resins, benzoguanamine resins, rosin-modified maleic acid resins, rosin-modified fumaric acid resins, melamine resins, urea resins, and phenol resins.

  Examples of the thermosetting resin include benzoguanamine resin, rosin-modified maleic acid resin, rosin-modified fumaric acid resin, melamine resin, urea resin, and phenol resin.

  Examples of the alkali-soluble resin obtained by copolymerizing an acidic group-containing ethylenically unsaturated monomer include resins having an acidic group such as a carboxyl group and a sulfone group.

  Specific examples of the alkali-soluble resin include an acrylic resin having an acidic group, an α-olefin / (anhydrous) maleic acid copolymer, a styrene / styrene sulfonic acid copolymer, an ethylene / (meth) acrylic acid copolymer, or Examples include isobutylene / (anhydrous) maleic acid copolymer. Among these, at least one resin selected from an acrylic resin having an acidic group and a styrene / styrene sulfonic acid copolymer, particularly an acrylic resin having an acidic group, is preferably used because of its high heat resistance and transparency.

  The binder resin (B) can be used in an amount of 20 to 400 parts by weight, preferably 50 to 250 parts by weight, with respect to 100 parts by weight of the pigment (A) in the coloring composition.

<Pigment dispersant (C)>
When the pigment (A) is dispersed in the binder resin (B) and / or solvent, a pigment dispersant (C) such as a resin-type pigment dispersant, a dye derivative, or a surfactant can be appropriately contained. . Since the pigment dispersant (C) is excellent in dispersing the pigment and has a large effect of preventing reaggregation of the pigment after dispersion, the pigment is dispersed in the binder resin (B) and / or solvent using the pigment dispersant (C). When a coloring composition dispersed in is used, a color filter excellent in transparency can be obtained.

  In particular, the colored composition of the present invention preferably contains an acidic resin-type pigment dispersant from the viewpoint of the stability of the colored composition. Furthermore, by using an acidic resin-type pigment dispersant in combination with a basic dye derivative, not only the fluidity and stability of the colored composition, but also a filter segment with excellent brightness and high contrast ratio can be obtained. It is preferable.

  The pigment dispersant (C) can be used in an amount of 0.1 to 40 parts by weight, preferably 0.1 to 30 parts by weight with respect to 100 parts by weight of the pigment (A).

<Resin type pigment dispersant>
The resin-type pigment dispersant has a pigment-affinity part that has the property of adsorbing to the pigment and a part that is compatible with the dye carrier, and adsorbs to the pigment to stabilize the dispersion of the pigment on the dye carrier. It works. Specific examples of resin-type pigment dispersants include polycarboxylic acid esters such as polyurethane and polyacrylate, unsaturated polyamides, polycarboxylic acids, polycarboxylic acid (partial) amine salts, polycarboxylic acid ammonium salts, and polycarboxylic acid alkylamines. Salts, polysiloxanes, long-chain polyaminoamide phosphates, hydroxyl group-containing polycarboxylic acid esters, their modified products, amides formed by the reaction of poly (lower alkyleneimines) with polyesters having free carboxyl groups, and the like Water-based dispersants such as oily dispersants such as salts, (meth) acrylic acid-styrene copolymers, (meth) acrylic acid- (meth) acrylic acid ester copolymers, styrene-maleic acid copolymers, polyvinyl alcohol, polyvinylpyrrolidone Resin, water-soluble polymer, polyester Modified polyacrylate, ethylene oxide / propylene oxide addition compound, phosphate ester-based and the like are used, they can be used alone or in admixture of two or more.

  Commercially available resin-type dispersants include Disperbyk-101, 103, 107, 108, 110, 111, 112, 116, 130, 140, 142, 154, 161, 162, 163, 164, 165 manufactured by Big Chemie Japan. 166, 170, 171, 174, 180, 181, 182, 183, 184, 185, 190, 2000, 2001, 2020, 2025, 2050, 2070, 2095, 2150, 2155 or Anti-Terra-U, 203, 204 Or BYK-P104, P104S, 220S, 6919, or SOLPERSE-3000, 9000, 13000, 13240, 13650, 13 manufactured by Nihon Lubrizol Corporation, Lactimon, Lactimon-WS, or Bykumen et al. 40, 16000, 17000, 18000, 20000, 21000, 24000, 26000, 27000, 28000, 31845, 32000, 32500, 32550, 33500, 32600, 34750, 35100, 36600, 38500, 41000, 41090, 53095, 55000, 76500, etc. EFKA-46, 47, 48, 452, 4008, 4009, 4010, 4015, 4020, 4047, 4050, 4055, 4060, 4080, 4400, 4401, 4402, 4403, 4406, 4408, 4300, manufactured by Ciba Japan , 4310, 4320, 4330, 4340, 450, 451, 453, 4540, 4550, 4560, 4800, 5010, 5065, 5066, 5070 7500, 7554, 1101, 120, 150, 1501, 1502, 1503, etc., DISPARLON 3600N, DISPARLON 1850 manufactured by Enomoto Kasei Co., Ltd., Ajimoto PA 111, PB711, PB821, PB822, PB824 manufactured by Ajinomoto Fine Techno Co., etc. It can use individually or in mixture of 2 or more types.

  Among these, Dispersbyk-108, 110, 111, 112, 116, 142, 180, 2000, 2001 manufactured by Big Chemie Japan, or SOLPERSE manufactured by Lubrizol Japan, which is a resin-type pigment dispersant having an acidic functional group. -3000, 21000, 26000, 36600, 41000, or EFKA-4401, 4550 manufactured by Ciba Japan, or DISPARLON 3600N, DISPARLON 1850 manufactured by Enomoto Kasei Co., or Ajimoto Fine Techno Co., Ltd. It is not limited.

<Dye derivative>
Examples of the dye derivative include a compound in which a basic substituent, an acidic substituent, or an optionally substituted phthalimidomethyl group is introduced into an organic pigment, anthraquinone, acridone, or triazine.

The structure is, for example, a compound represented by the following general formula (50), among which pigment derivatives are preferable.
Formula (50):
P-Lm
[In general formula (50),
P: organic pigment residue, anthraquinone residue, acridone residue or triazine residue L: basic substituent, acidic substituent, or optionally substituted phthalimidomethyl group m: an integer of 1 to 4 is there]
Examples of the dye derivative are described in JP-A-63-305173, JP-B-57-15620, JP-B-59-40172, JP-B-63-17102, or JP-B-5-9469. What is currently used can be used, These can be used individually or in mixture of 2 or more types.

  In the general formula (50), examples of the organic pigment constituting the organic pigment residue of P include the following.

  Examples of the organic pigment constituting the organic pigment residue of P include, for example, diketopyrrolopyrrole pigments; azo pigments such as azo, disazo and polyazo; copper phthalocyanine, halogenated copper phthalocyanine, zinc phthalocyanine, halogenated zinc phthalocyanine, Phthalocyanine pigments such as metal-free phthalocyanine; Anthraquinone pigments such as aminoanthraquinone, diaminodianthraquinone, anthrapyrimidine, flavantron, anthanthrone, indanthrone, pyranthrone, violanthrone; quinacridone pigment; dioxazine pigment; perinone pigment; Thioindigo pigments; isoindoline pigments; isoindolinone pigments; selenium pigments; quinophthalone pigments; dioxazine pigments; metal complex pigments.

  Especially, the pigment derivative which has a basic substituent whose L in General formula (50) is a basic substituent can be used preferably.

  By including a dye derivative having a basic substituent, a pigment composition having excellent dispersibility, fluidity, and storage stability can be obtained even in the case of a pigment that is difficult to disperse without a dye derivative having a basic substituent. This is preferable. The pigment can be effectively dispersed by the synergistic effect of the acidic resin type dispersant and the dye derivative having a basic substituent, and a pigment composition having excellent fluidity and storage stability can be obtained.

Among the basic substituents, L is preferably a substituent selected from the group represented by the general formulas (51), (52), and (53).
General formula (51):

一般式（５２）：

Formula (52):

一般式（５３）：

Formula (53):

［一般式（５１）〜（５３）中、
Ｘは、−ＳＯ₂−、−ＣＯ−、−ＣＨ₂−、−ＣＨ₂ＮＨＣＯＣＨ₂−、−ＣＨ₂ＮＨＳＯ₂ＣＨ₂−、又は直接結合であり、
Ｙは、−ＮＨ−、−Ｏ−、又は直接結合であり、
ｋは、１〜１０の整数であり、
Ｙ¹は、−ＮＨ−、−ＮＲ⁵⁸−Ｚ−ＮＲ⁵⁹−、又は直接結合であり、
Ｒ⁵⁸、及びＲ⁵⁹は、それぞれ独立に、水素結合、置換基を有しても良い炭素数１〜３６のアルキル基、置換基を有しても良い炭素数２〜３６のアルケニル基、又は置換基を有しても良いフェニル基であり、
Ｚは、置換基を有しても良いアルキレン基、又は置換基を有しても良いアリーレン基であり、
Ｒ⁵⁰、Ｒ⁵¹は、それぞれ独立に、水素原子、置換基を有しても良い炭素数１〜３０のアルキル基、置換基を有しても良い炭素数２〜３０のアルケニル基、又はＲ⁵⁰とＲ⁵¹とが一体となって更なる窒素、酸素、若しくは硫黄原子を含む、置換基を有しても良い複素環であり、
Ｒ⁵²、Ｒ⁵³、Ｒ⁵⁴、及びＲ⁵⁵は、それぞれ独立に、水素原子、置換基を有しても良い炭素数１〜２０のアルキル基、置換基を有しても良い炭素数２〜２０のアルケニル基、置換基を有しても良い炭素数６〜２０のアリーレン基であり、
Ｒ⁵⁶は、水素原子、置換基を有しても良い炭素数１〜２０のアルキル基、置換基を有しても良い炭素数２〜２０のアルケニル基であり、
Ｒ⁵⁷は、上記一般式（５１）で示される置換基、又は上記一般式（５２）で示される置換基であり、
Ｑは、水酸基、アルコキシル基、上記一般式（５１）で示される置換基、又は上記一般式（５２）で示される置換基である。］

[In the general formulas (51) to (53),
X _{is, -SO 2 -, - CO -} , - CH 2 -, - CH 2 NHCOCH 2 -, - CH 2 NHSO 2 CH 2 -, or a direct bond,
Y is —NH—, —O—, or a direct bond;
k is an integer of 1 to 10,
Y ¹ is —NH—, —NR ⁵⁸ —Z—NR ⁵⁹ —, or a direct bond;
R ⁵⁸ and R ⁵⁹ are each independently a hydrogen bond, an optionally substituted alkyl group having 1 to 36 carbon atoms, an optionally substituted alkenyl group having 2 to 36 carbon atoms, or A phenyl group which may have a substituent,
Z is an alkylene group which may have a substituent, or an arylene group which may have a substituent,
R ⁵⁰ and R ⁵¹ are each independently a hydrogen atom, an optionally substituted alkyl group having 1 to 30 carbon atoms, an optionally substituted alkenyl group having 2 to 30 carbon atoms, or R ⁵⁰ and R ⁵¹ together are a heterocyclic ring which may further have a substituent containing a further nitrogen, oxygen or sulfur atom,
R ⁵² , R ⁵³ , R ⁵⁴ , and R ⁵⁵ are each independently a hydrogen atom, an alkyl group having 1 to 20 carbon atoms that may have a substituent, or 2 to carbon atoms that may have a substituent. 20 alkenyl group, an arylene group having 6 to 20 carbon atoms which may have a substituent,
R ⁵⁶ is a hydrogen atom, an optionally substituted alkyl group having 1 to 20 carbon atoms, an optionally substituted alkenyl group having 2 to 20 carbon atoms,
R ⁵⁷ is a substituent represented by the general formula (51) or a substituent represented by the general formula (52);
Q is a hydroxyl group, an alkoxyl group, a substituent represented by the above general formula (51), or a substituent represented by the above general formula (52). ]

  Examples of the amine component used for forming the substituents represented by the general formulas (51) to (53) include dimethylamine, diethylamine, methylethylamine, N, N-ethylisopropylamine, N, N-ethyl. Propylamine, N, N-methylbutylamine, N, N-methylisobutylamine, N, N-butylethylamine, N, N-tert-butylethylamine, diisopropylamine, dipropylamine, N, N-sec-butylpropylamine , Dibutylamine, di-sec-butylamine, diisobutylamine, N, N-isobutyl-sec-butylamine, diamylamine, diisoamylamine, dihexylamine, dicyclohexylamine, di (2-ethylhexyl) amine, dioctylamine, N, N-methylocta Silamine, didecylamine, diallylamine, N, N-ethyl-1,2-dimethylpropylamine, N, N-methylhexylamine, dioleylamine, distearylamine, N, N-dimethylaminomethylamine, N, N-dimethylamino Ethylamine, N, N-dimethylaminoamylamine, N, N-dimethylaminobutylamine, N, N-diethylaminoethylamine, N, N-diethylaminopropylamine, N, N-diethylaminohexylamine, N, N-diethylaminobutylamine, N , N-diethylaminopentylamine, N, N-dipropylaminobutylamine, N, N-dibutylaminopropylamine, N, N-dibutylaminoethylamine, N, N-dibutylaminobutylamine, N, N-diisobutylamino Nthylamine, N, N-methyl-laurylaminopropylamine, N, N-ethyl-hexylaminoethylamine, N, N-distearylaminoethylamine, N, N-dioleylaminoethylamine, N, N-distearylaminobutylamine, Piperidine, 2-Pipecoline, 3-Pipecoline, 4-Pipecoline, 2,4-Lupetidine, 2,6-Lupetidine, 3,5-Lupetidine, 3-Piperidinmethanol, Pipecolic acid, Isonipecotic acid, Methyl isonipecotate, Isonipecotic acid Ethyl, 2-piperidineethanol, pyrrolidine, 3-hydroxypyrrolidine, N-aminoethylpiperidine, N-aminoethyl-4-pipecholine, N-aminoethylmorpholine, N-aminopropylpiperidine, N-aminopropyl-2-pipecoly N-aminopropyl-4-pipecholine, N-aminopropylmorpholine, N-methylpiperazine, N-butylpiperazine, N-methylhomopiperazine, 1-cyclopentylpiperazine, 1-amino-4-methylpiperazine, 1-cyclopentylpiperazine Etc.

The dye derivative having a basic substituent of the present invention can be synthesized by various synthetic routes. For example, after introducing a substituent represented by formulas (54) to (57) into an organic dye, the amine component reacts with the substituent to form a substituent represented by formulas (51) to (53), For example, N, N-dimethylaminopropylamine, N-methylpiperazine, diethylamine, or 4- [4-hydroxy-6- [3- (dibutylamino) propylamino] -1,3,5-triazin-2-ylamino It can be obtained by reacting aniline or the like.
Equation (54): -SO ₂ Cl
Formula (55): -COCl
Equation _{(56): -CH 2 NHCOCH 2} Cl
Equation (57): -CH ₂ Cl
During the reaction of the substituents of formulas (54) to (56) with the amine component, some of the substituents of formulas (54) to (57) are hydrolyzed, and chlorine is substituted with a hydroxyl group. It may be. In that case, the formula (54) and the formula (55) are a sulfonic acid group and a carboxylic acid group, respectively, but both may be a free acid, or a 1-3 valent metal or the above monoamine. Or a salt thereof.

  Further, when the organic dye is an azo dye, the substituent represented by the general formulas (51) to (53) is introduced into the diazo component or the coupling component in advance, and then a coupling reaction is performed, thereby performing the azo pigment. Derivatives can also be produced.

  The triazine derivative having a basic substituent of the present invention can be synthesized by various synthetic routes. For example, an amine component starting from cyanuric chloride and forming a substituent represented by the general formulas (51) to (53) on at least one chlorine of cyanuric chloride, such as N, N-dimethylaminopropylamine or N- It can be obtained by reacting methylpiperazine or the like and then reacting the remaining chlorine of cyanuric chloride with various amines or alcohols.

<Surfactant>
Surfactants include polyoxyethylene alkyl ether sulfate, sodium dodecylbenzenesulfonate, alkali salt of styrene-acrylic acid copolymer, sodium alkylnaphthalenesulfonate, sodium alkyldiphenyletherdisulfonate, lauryl sulfate monoethanolamine, lauryl Anionic surfactants such as triethanolamine sulfate, ammonium lauryl sulfate, monoethanolamine stearate, sodium stearate, sodium lauryl sulfate, monoethanolamine of styrene-acrylic acid copolymer, polyoxyethylene alkyl ether phosphate; Polyoxyethylene oleyl ether, polyoxyethylene lauryl ether, polyoxyethylene nonylphenyl ether, polyoxyethylene Nonionic surfactants such as alkyl ether phosphates, polyoxyethylene sorbitan monostearate, and polyethylene glycol monolaurate; chaotic surfactants such as alkyl quaternary ammonium salts and their ethylene oxide adducts; alkyldimethylamino Examples include amphoteric surfactants such as alkylbetaines such as betaine acetate and alkylimidazolines, and these can be used alone or in admixture of two or more.

<Solvent>
The solvent is obtained by sufficiently dispersing the pigment (A) in the binder resin (B) and applying the colored composition of the present invention on a substrate such as a glass substrate so that the dry film thickness is 0.2 to 5 μm. Used to facilitate forming filter segments.

  As the solvent, 1,2,3-trichloropropane, 1,3-butylene glycol, 1,3-butylene glycol diacetate, 1,4-dioxane, 2-heptanone, 2-methyl-1,3-propanediol, 3,5,5-trimethyl-2-cyclohexen-1-one, 3,3,5-trimethylcyclohexanone, ethyl 3-ethoxypropionate, 3-methyl-1,3-butanediol, 3-methoxy-3-methyl -1-butanol, 3-methoxy-3-methylbutyl acetate, 3-methoxybutanol, 3-methoxybutyl acetate, 4-heptanone, m-xylene, m-diethylbenzene, m-dichlorobenzene, N, N-dimethylacetamide, N, N-dimethylformamide, n-butyl alcohol, n-butylbenzene, n-propyl acetate, N- Methylpyrrolidone, o-xylene, o-chlorotoluene, o-diethylbenzene, o-dichlorobenzene, P-chlorotoluene, P-diethylbenzene, seC-butylbenzene, tert-butylbenzene, γ-butyrolactone, isobutyl alcohol, isophorone, ethylene Glycol diethyl ether, ethylene glycol dibutyl ether, ethylene glycol monoisopropyl ether, ethylene glycol monoethyl ether, ethylene glycol monoethyl ether acetate, ethylene glycol monotertiary butyl ether, ethylene glycol monobutyl ether, ethylene glycol monobutyl ether acetate, ethylene glycol monopropyl Ether, ethylene glycol monohexyl ether, ethylene glycol Recall monomethyl ether, ethylene glycol monomethyl ether acetate, diisobutyl ketone, diethylene glycol diethyl ether, diethylene glycol dimethyl ether, diethylene glycol monoisopropyl ether, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetate, diethylene glycol monomethyl ether, cyclohexanol, cyclohexanol acetate , Cyclohexanone, dipropylene glycol dimethyl ether, dipropylene glycol methyl ether acetate, dipropylene glycol monoethyl ether, dipropylene glycol monobutyl ether, dipropylene glycol monopropyl Pill ether, dipropylene glycol monomethyl ether, diacetone alcohol, triacetin, tripropylene glycol monobutyl ether, tripropylene glycol monomethyl ether, propylene glycol diacetate, propylene glycol phenyl ether, propylene glycol monoethyl ether, propylene glycol monoethyl ether acetate, Propylene glycol monobutyl ether, propylene glycol monopropyl ether, propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, propylene glycol monomethyl ether propionate, benzyl alcohol, methyl isobutyl ketone, methylcyclohexanol, n-amyl acetate, n-acetate Chill, isoamyl acetate, isobutyl acetate, propyl acetate, and dibasic acid esters.

  These solvents can be used singly or in combination of two or more at any ratio as required.

  The content of the solvent is 800 to 4000 parts by weight with respect to 100 parts by weight of the pigment (A), so that the coloring composition is adjusted to an appropriate viscosity, and a desired filter segment having a uniform film thickness is obtained. It is preferable because it can be formed.

<Photopolymerization initiator (D)>
In the photosensitive coloring composition of the present invention, in order to cure the composition by ultraviolet irradiation and form a filter segment by a photolithography method, a photopolymerization initiator (D) is added and a solvent development type or an alkali development type. It can be prepared in the form of a photosensitive coloring composition.

  As photopolymerization initiator (D), 4-phenoxydichloroacetophenone, 4-t-butyl-dichloroacetophenone, diethoxyacetophenone, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropan-1-one 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropan-1-one, 2- (dimethylamino) -2-[(4-methylphenyl) methyl Acetophenone compounds such as 1- [4- (4-morpholinyl) phenyl] -1-butanone or 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butan-1-one; Benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether Or benzoin compounds such as benzyldimethyl ketal; benzophenone, benzoylbenzoic acid, methyl benzoylbenzoate, 4-phenylbenzophenone, hydroxybenzophenone, acrylated benzophenone, 4-benzoyl-4'-methyldiphenyl sulfide, or 3,3 Benzophenone compounds such as', 4,4'-tetra (t-butylperoxycarbonyl) benzophenone; thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, isopropylthioxanthone, 2,4-diisopropylthioxanthone, or 2,4- Thioxanthone compounds such as diethylthioxanthone; 2,4,6-trichloro-s-triazine, 2-phenyl-4,6-bis (trichloromethyl) -s-triazine, 2- (p Methoxyphenyl) -4,6-bis (trichloromethyl) -s-triazine, 2- (p-tolyl) -4,6-bis (trichloromethyl) -s-triazine, 2-piperonyl-4,6-bis ( Trichloromethyl) -s-triazine, 2,4-bis (trichloromethyl) -6-styryl-s-triazine, 2- (naphth-1-yl) -4,6-bis (trichloromethyl) -s-triazine, 2- (4-Methoxy-naphth-1-yl) -4,6-bis (trichloromethyl) -s-triazine, 2,4-trichloromethyl- (piperonyl) -6-triazine, or 2,4-trichloromethyl Triazine compounds such as-(4'-methoxystyryl) -6-triazine; ethanone, 1- [9-ethyl-6- (2-methylbenzoyl) -9H-carbazole Oxime ester compounds such as -3-yl]-, 1- (0-acetyloxime), 1,2-octadion-1- [4- (phenylthio)-, 2- (O-benzoyloxime)]; Phosphine compounds such as 2,4,6-trimethylbenzoyl) phenylphosphine oxide or 2,4,6-trimethylbenzoyldiphenylphosphine oxide; quinone compounds such as 9,10-phenanthrenequinone, camphorquinone and ethylanthraquinone A borate compound; a carbazole compound; an imidazole compound; or a titanocene compound.

  These photoinitiators can be used individually by 1 type or in mixture of 2 or more types by arbitrary ratios as needed.

  Among these, as the photopolymerization initiator (D), at least one photopolymerization initiator (D1) selected from the group consisting of acetophenone compounds, phosphine compounds, imidazole compounds, and oxime ester compounds is used. It is preferable to include.

  By including these photopolymerization initiators (D1), the pattern shape and linearity of the filter segment become better.

  The content of the photopolymerization initiator (D) is preferably 5 to 200 parts by weight with respect to 100 parts by weight of the pigment (A), and 10 to 150 parts by weight from the viewpoint of photocurability and developability. Is more preferable.

<Sensitizer>
Furthermore, the coloring composition for a color filter of the present invention can contain a sensitizer.
Sensitizers include chalcone derivatives, unsaturated ketones such as dibenzalacetone, 1,2-diketone derivatives such as benzyl and camphorquinone, benzoin derivatives, fluorene derivatives, naphthoquinone derivatives, anthraquinone derivatives , Xanthene derivatives, thioxanthene derivatives, xanthone derivatives, thioxanthone derivatives, coumarin derivatives, ketocoumarin derivatives, cyanine derivatives, merocyanine derivatives, oxonol derivatives, and other polymethine dyes, acridine derivatives, azine derivatives, thiazine derivatives, oxazine derivatives, indoline derivatives, Azulene derivatives, azurenium derivatives, squarylium derivatives, porphyrin derivatives, tetraphenylporphyrin derivatives, triarylmethane derivatives, tetrabenzoporphyrin derivatives, Trapirazinoporphyrazine derivatives, phthalocyanine derivatives, tetraazaporphyrazine derivatives, tetraquinoxalyloporphyrazine derivatives, naphthalocyanine derivatives, subphthalocyanine derivatives, pyrylium derivatives, thiopyrylium derivatives, tetraphylline derivatives, annulene derivatives, spiropyran derivatives, spirooxazine Derivatives, thiospiropyran derivatives, metal arene complexes, organoruthenium complexes, or Michler's ketone derivatives, α-acyloxy esters, acylphosphine oxides, methylphenylglyoxylate, benzyl, 9,10-phenanthrenequinone, camphorquinone, ethyl Anthraquinone, 4,4'-diethylisophthalophenone, 3,3 ', or 4,4'-tetra (t-butylperoxycarbonyl) benzopheno And 4,4′-diethylaminobenzophenone.

  These sensitizers can be used singly or in combination of two or more at any ratio as necessary.

  More specifically, edited by Shin Okawara et al., “Dye Handbook” (1986, Kodansha), edited by Shin Okawara et al., “Chemistry of Functional Dye” (1981, CMC), edited by Tadasaburo Ikemori et al. Examples include, but are not limited to, sensitizers described in "Special Functional Materials" (1986, CMC). In addition, a sensitizer that absorbs light from the ultraviolet region to the near infrared region can also be contained.

  The content of the sensitizer is preferably 3 to 60 parts by weight with respect to 100 parts by weight of the photopolymerization initiator (D) contained in the colored composition, and 5 to 5 from the viewpoint of photocurability and developability. More preferably, it is 50 parts by weight.

<Photopolymerizable compound>
The photopolymerizable compound used in the present invention includes a monomer or oligomer that forms a resin by being cured by ultraviolet rays or heat.

  Examples of the photopolymerizable compound include methyl (meth) acrylate, ethyl (meth) acrylate, ethyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, and cyclohexyl (meth) acrylate. , Β-carboxyethyl (meth) acrylate, polyethylene glycol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, triethylene glycol di (meth) acrylate, tripropylene glycol di (meth) acrylate, trimethylol Propane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, 1,6-hexanediol diglycidyl ether di (meth) acrylate, bisphenol A diglycidyl ether di (Meth) acrylate, neopentyl glycol diglycidyl ether di (meth) acrylate, dipentaerythritol hexa (meth) acrylate, tricyclodecanyl (meth) acrylate, ester acrylate, (meth) acrylic acid ester of methylolated melamine, epoxy Various acrylic and methacrylic esters such as (meth) acrylate and urethane acrylate, (meth) acrylic acid, styrene, vinyl acetate, hydroxyethyl vinyl ether, ethylene glycol divinyl ether, pentaerythritol trivinyl ether, (meth) acrylamide, N- Examples thereof include hydroxymethyl (meth) acrylamide, N-vinylformamide, acrylonitrile and the like. These can be used alone or in admixture of two or more.

  These photopolymerizable compounds can be used singly or in combination of two or more at any ratio as required.

  The content of the photopolymerizable monomer (C) is preferably 10 to 300 parts by weight with respect to 100 parts by weight of the pigment (A), and 10 to 200 parts by weight from the viewpoint of photocurability and developability. More preferably.

<Multifunctional thiol>
The coloring composition of the present invention can contain a polyfunctional thiol (F). A polyfunctional thiol is a compound having two or more thiol (SH) groups.
When the polyfunctional thiol is used together with the above-mentioned photopolymerization initiator (D), a thiyl radical that acts as a chain transfer agent and is less susceptible to polymerization inhibition by oxygen is generated in the radical polymerization process after light irradiation. The coloring property composition has high sensitivity. In particular, a polyfunctional aliphatic thiol in which an SH group is bonded to an aliphatic group such as methylene or ethylene group is preferable.

  Examples of the polyfunctional thiol include hexanedithiol, decanedithiol, 1,4-butanediol bisthiopropionate, 1,4-butanediol bisthioglycolate, ethylene glycol bisthioglycolate, and ethylene glycol bisthiopropioate. , Trimethylolpropane tristhioglycolate, trimethylolpropane tristhiopropionate, trimethylolethane tris (3-mercaptobutyrate), trimethylolpropane tris (3-mercaptobutyrate), trimethylolpropane tris (3- Mercaptopropionate), pentaerythritol tetrakisthioglycolate, pentaerythritol tetrakisthiopropionate, pentaerythritol tetrakis (3-mercaptopropioate) Dipentaerythritol hexakis (3-mercaptopropionate), trimercaptopropionic acid tris (2-hydroxyethyl) isocyanurate, 1,4-dimethylmercaptobenzene, 2,4,6-trimercapto-s -Triazine, 2- (N, N-dibutylamino) -4,6-dimercapto-s-triazine and the like.

  These polyfunctional thiols can be used singly or in combination of two or more in any ratio as necessary.

  The content of the polyfunctional thiol is preferably 0.05 to 100 parts by weight, more preferably 1.0 to 50.0 parts by weight with respect to 100 parts by weight of the pigment (A).

  By using 0.05 part by weight or more of polyfunctional thiol, better development resistance can be obtained. When a monofunctional thiol having one thiol (SH) group is used, such an improvement in development resistance cannot be obtained.

<Ultraviolet absorber>
The photosensitive coloring composition of the present invention can contain an ultraviolet absorber. By containing the ultraviolet absorber, the shape and resolution of the pattern can be controlled.

  Examples of the ultraviolet absorber include 2- [4-[(2-hydroxy-3- (dodecyl and tridecyl) oxypropyl) oxy] -2-hydroxyphenyl] -4,6-bis (2,4-dimethylphenyl). -1,3,5-triazine, 2- (2-hydroxy-4- [1-octyloxycarbonylethoxy] phenyl) -4,6-bis (4-phenylphenyl) -1,3,5-triazine, etc. Hydroxyphenyltriazine, 2- (5-methyl-2-hydroxyphenyl) benzotriazole, 2- (2H-benzotriazol-2-yl) -4,6-bis (1-methyl-1-phenylethyl) phenol, Benzotriazoles such as 2- (3-tbutyl-5-methyl-2-hydroxyphenyl) -5-chlorobenzotriazole, 2,4- Benzophenone series such as hydroxybenzophenone, 2-hydroxy-4-octoxybenzophenone, 2,2 ′, 4,4′-tetrahydroxybenzophenone, salicylate series such as phenyl salicylate, p-tert-butylphenyl salicylate, Cyanoacrylates such as ethyl-2-cyano-3,3′-diphenylacrylate, 2,2,6,6, -tetramethylpiperidine-1-oxyl (triacetone-amine-N-oxyl), bis (2, 2,6,6-tetramethyl-4-piperidyl) -sebacate, poly [[6-[(1,1,3,3-tetrabutyl) amino] -1,3,5-triazine-2,4-diyl] And hindered amines such as [(2,2,6,6-tetramethyl-4-piperidinyl) imino].

  These ultraviolet absorbers can be used singly or in combination of two or more at any ratio as required.

Content of a ultraviolet absorber is 0.01-20 weight part with respect to 100 weight part of pigments (D), Preferably it can be used in the quantity of 0.05-10 weight part.
By using 0.01 part by weight or more of the ultraviolet absorber, better resolution can be obtained.

<Polymerization inhibitor>
The photosensitive coloring composition of the present invention can contain a polymerization inhibitor. By containing a polymerization inhibitor, the shape and resolution of the pattern can be controlled.

  Examples of the polymerization inhibitor include hydroquinone such as methyl hydroquinone, t-butyl hydroquinone, 2,5-di-t-butyl hydroquinone, 4-benzoquinone, 4-methoxyphenol, 4-methoxy-1-naphthol, and t-butylcatechol. Derivatives and phenolic compounds, amine compounds such as phenothiazine, bis- (1-dimethylbenzyl) phenothiazine, 3,7-dioctylphenothiazine, copper dibutyldithiocarbamate, copper diethyldithiocarbamate, manganese diethyldithiocarbamate, manganese diphenyldithiocarbamate, etc. And manganese salt compounds, 4-nitrosophenol, N-nitrosodiphenylamine, N-nitrosocyclohexylhydroxylamine, N-nitrosophenylhydroxylamine Nitroso compounds and their ammonium salts or aluminum salts and the like.

  These polymerization inhibitors can be used singly or as a mixture of two or more at any ratio as required.

The content of the polymerization inhibitor can be used in an amount of 0.01 to 20 parts by weight, preferably 0.05 to 10 parts by weight with respect to 100 parts by weight of the pigment (D).
Better resolution can be obtained by using 0.01 parts by weight or more of the polymerization inhibitor.

<Storage stabilizer>
The coloring composition of the present invention can contain a storage stabilizer. By containing a storage stabilizer, the viscosity with time of the composition can be stabilized.

  Examples of the storage stabilizer include 2,6-bis (1,1-dimethylethyl) -4-methylphenol, pentaerystyryl-tetrakis [3- (3,5-di-t-butyl-4-hydroxyphenyl). Propionate], hindered phenols such as 2,4-bis- (n-octylthio) -6- (4-hydroxy-3,5-di-t-butylanilino) 1,3,5-triazine, tetraethylphosphine, tri Organic phosphines such as phenylphosphine and tetraphenylphosphine, phosphites such as zinc dimethyldithiophosphate, zinc dipropyldithiophosphate and molybdenum dibutyldithiophosphate, sulfurs such as dodecyl sulfide and benzothiophene, benzyltrimethyl chloride, Quaternary ammonium chloride such as diethylhydroxyamine , Lactic acid, and organic acids and their methyl ethers such as oxalic acid.

  These storage stabilizers can be used singly or as a mixture of two or more at any ratio as required.

The content of the storage stabilizer can be 0.01 to 20 parts by weight, preferably 0.05 to 10 parts by weight with respect to 100 parts by weight of the pigment (D).
By using 0.01 part by weight or more of the storage stabilizer, the temporal stability of the coloring composition is improved.

<Other ingredients>
The photosensitive coloring composition of the present invention contains an adhesion improver such as a silane coupling agent or an amine compound that functions to reduce dissolved oxygen in order to enhance the adhesion to the transparent substrate. Can do.

  Examples of the adhesion improver include vinyl silanes such as vinyltris (β-methoxyethoxy) silane, vinylethoxysilane, and vinyltrimethoxysilane, (meth) acrylsilanes such as γ-methacryloxypropyltrimethoxysilane, β- (3 , 4-epoxycyclohexyl) ethyltrimethoxysilane, β- (3,4-epoxycyclohexyl) methyltrimethoxysilane, β- (3,4-epoxycyclohexyl) ethyltriethoxysilane, β- (3,4-epoxycyclohexyl) ) Epoxysilanes such as methyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, N-β (aminoethyl) γ-aminopropyltrimethoxysilane, N-β ( Aminoethyl) γ-aminopropyl Reethoxysilane, N-β (aminoethyl) γ-aminopropylmethyldiethoxysilane, γ-aminopropyltriethoxysilane, γ-aminopropyltrimethoxysilane, N-phenyl-γ-aminopropyltrimethoxysilane, N Examples include silane coupling agents such as aminosilanes such as -phenyl-γ-aminopropyltriethoxysilane, and thiosilanes such as γ-mercaptopropyltrimethoxysilane and γ-mercaptopropyltriethoxysilane.

  These adhesion improvers can be used alone or in admixture of two or more at any ratio as required.

  The adhesion improver can be used in an amount of 0.01 to 10 parts by weight, preferably 0.05 to 5 parts by weight with respect to 100 parts by weight of the pigment (D).

  Examples of amine compounds include triethanolamine, methyldiethanolamine, triisopropanolamine, methyl 4-dimethylaminobenzoate, ethyl 4-dimethylaminobenzoate, isoamyl 4-dimethylaminobenzoate, 2-dimethylaminoethyl benzoate, 4 -2-ethylhexyl dimethylaminobenzoate, N, N-dimethyl paratoluidine, etc. are mentioned.

  These amine compounds can be used singly or in combination of two or more at any ratio as required.

<Production method of photosensitive coloring composition>
The photosensitive coloring composition of the present invention comprises a three-roll mill, two-roll mill, sand mill, pigment (A) in a dye carrier such as a binder resin (B) and / or a solvent, preferably together with a pigment dispersant. A pigment dispersion is produced by finely dispersing using various dispersing means such as a kneader and an attritor, and a photopolymerization initiator (D), a binder resin (B), a photopolymerizable compound, depending on circumstances. A sensitizer (E), a polyfunctional thiol, an ultraviolet absorber, a polymerization inhibitor, a storage stabilizer, a solvent, and other components can be mixed and stirred. In addition, a coloring composition containing two or more pigments is prepared by mixing each pigment dispersion separately in a fine carrier and / or solvent, and further mixing a photopolymerization initiator (D) or photopolymerization property. It can be produced by mixing and stirring compounds and the like.

<Removal of coarse particles>
The photosensitive coloring composition is obtained by means of centrifugal separation, sintering filter, membrane filter or the like, coarse particles of 5 μm or more, preferably coarse particles of 1 μm or more, more preferably coarse particles of 0.5 μm or more and mixed dust. Is preferably removed.

<Color filter>
Next, the color filter of the present invention will be described.
The color filter of the present invention is provided with a filter segment formed from the colored composition of the present invention on a transparent substrate, and a general color filter includes at least one red filter segment and at least one green filter segment. And at least one blue filter segment, or at least one magenta filter segment, at least one cyan filter segment, and at least one yellow filter segment.

  As the transparent substrate, glass plates such as soda lime glass, low alkali borosilicate glass and non-alkali alumino borosilicate glass, and resin plates such as polycarbonate, polymethyl methacrylate, and polyethylene terephthalate are used. In addition, a transparent electrode made of indium oxide, tin oxide, or the like may be formed on the surface of the glass plate or the resin plate in order to drive the liquid crystal after forming the panel.

  The dry film thickness of the filter segment is preferably 0.2 to 10 μm, more preferably 0.2 to 5 μm. When drying the coating film, a vacuum dryer, a convection oven, an IR oven, a hot plate, or the like may be used.

  The formation of each color filter segment by photolithography is performed by the following method. That is, the photosensitive coloring composition prepared as a solvent developing type or alkali developing type colored resist material has a dry film thickness of 0. 0 on a transparent substrate by a coating method such as spray coating, spin coating, slit coating or roll coating. It apply | coats so that it may become 2-10 micrometers. If necessary, the dried film is exposed to ultraviolet light through a mask having a predetermined pattern provided in contact with or non-contact with the film.

  Thereafter, the filter segment can be formed by immersing in a solvent or an alkaline developer, or spraying the developer with a spray or the like to remove the uncured portion to form a desired pattern. Furthermore, in order to accelerate the polymerization of the filter segment formed by development, heating can be performed as necessary. According to the photolithography method, a filter segment with higher accuracy than the printing method can be formed.

  In development, an aqueous solution such as sodium carbonate or sodium hydroxide is used as an alkali developer, and an organic alkali such as dimethylbenzylamine or triethanolamine can also be used. Moreover, an antifoamer and surfactant can also be added to a developing solution.

  As a development processing method, a shower development method, a spray development method, a dip (immersion) development method, a paddle (liquid accumulation) development method, or the like can be applied.

  In order to increase the UV exposure sensitivity, the photosensitive coloring composition is applied and dried, and then a water-soluble or alkali-soluble resin such as polyvinyl alcohol or a water-soluble acrylic resin is applied and dried to prevent polymerization inhibition due to oxygen. After forming, UV exposure can also be performed.

  The color filter of the present invention can be produced by an electrodeposition method, a transfer method, etc. in addition to the above method, but the colored composition of the present invention can be used in any method. The electrodeposition method is a method for producing a color filter by using a transparent conductive film formed on a substrate and forming each color filter segment on the transparent conductive film by electrophoresis of colloidal particles. . The transfer method is a method in which a filter segment is formed in advance on the surface of a peelable transfer base sheet, and this filter segment is transferred to a desired substrate.

  The colored composition of the present invention can be used in any of the methods described above, but is most suitable for the photolithography method.

  A black matrix can be formed in advance before forming each color filter segment on a transparent substrate or a reflective substrate. As the black matrix, a chromium, chromium / chromium oxide multilayer film, an inorganic film such as titanium nitride, or a resin film in which a light-shielding agent is dispersed is used, but is not limited thereto. In addition, a thin film transistor (TFT) may be formed in advance on the transparent substrate or the reflective substrate, and then each color filter segment may be formed. On the color filter of the present invention, an overcoat film, a columnar spacer, a transparent conductive film, a liquid crystal alignment film, and the like are formed as necessary.

  The color filter is bonded to the counter substrate using a sealant, and after injecting liquid crystal from the injection port provided in the seal part, the injection port is sealed, and if necessary, a polarizing film or a retardation film is placed outside the substrate. A liquid crystal display panel is manufactured by bonding.

  Such liquid crystal display panels include twisted nematic (TN), super twisted nematic (STN), in-plane switching (IPS), vertical alignment (VA), and optically convented bend (OCB). It can be used in a liquid crystal display mode in which colorization is performed using a color filter such as the above.

  Hereinafter, the present invention will be described based on examples, but the present invention is not limited thereto. In the examples, “parts” and “%” represent “parts by weight” and “% by weight”, respectively.

  The specific surface area of the pigment, the primary particle diameter of the pigment, the weight average molecular weight (Mw) of the resin, the acid value of the resin, and the contrast ratio (CR) of the coating film are measured as follows.

(Specific surface area of pigment)
The specific surface area of the pigment particles was determined by the BET method using nitrogen adsorption. For the measurement, an automatic vapor adsorption amount measuring device (“BELSORP18” manufactured by Nippon Bell Co., Ltd.) was used.

(Average primary particle diameter of pigment)
The average primary particle diameter of the pigment was measured by a method of directly measuring the primary particle size from an electron micrograph. Specifically, the minor axis diameter and major axis diameter of the primary particles of each pigment were measured, and the average was taken as the particle diameter of the pigment particles. Next, for 100 or more pigment particles, the volume (weight) of each particle was obtained by approximating the obtained particle size cube, and the volume average particle size was defined as the average primary particle size. The electron microscope used was a transmission type (TEM).

(Weight average molecular weight of resin (Mw))
It is a weight average molecular weight (Mw) in terms of polystyrene measured using TSKgel column (manufactured by Tosoh Corporation) and using GPC (manufactured by Tosoh Corporation, HLC-8120GPC) equipped with an RI detector using THF as a developing solvent.

(Resin acid value)
80 ml of acetone and 10 ml of water are added to 0.5 to 1 g of the resin solution and stirred to dissolve uniformly, and an automatic titrator ("COM-555" manufactured by Hiranuma Sangyo Co., Ltd.) is used with a 0.1 mol / L KOH aqueous solution as a titrant. ) And the acid value of the resin solution was measured. Then, the acid value per solid content of the resin was calculated from the acid value of the resin solution and the solid content concentration of the resin solution.

(Contrast ratio of coating film)
The light emitted from the backlight unit for liquid crystal display passes through the polarizing plate, is polarized, passes through the dried coating film of the colored composition applied on the glass substrate, and reaches the polarizing plate. If the polarizing planes of the polarizing plate and the polarizing plate are parallel, light is transmitted through the polarizing plate, but if the polarizing plane is perpendicular, the light is blocked by the polarizing plate. However, when the light polarized by the polarizing plate passes through the dried coating film of the colored composition, scattering by the pigment particles occurs, resulting in deviation in a part of the polarization plane. When the amount of light transmitted through the plate is reduced and the polarizing plate is perpendicular, a part of the light is transmitted through the polarizing plate. This transmitted light was measured as the luminance on the polarizing plate, and the ratio (contrast ratio) between the luminance when the polarizing plate was parallel and the luminance when it was orthogonal was calculated.

(Contrast ratio) = (Luminance when parallel) / (Luminance when direct)
A color luminance meter ("BM-5A" manufactured by Topcon Corporation) was used as the luminance meter, and a polarizing plate ("NPF-G1220DUN" manufactured by Nitto Denko Corporation) was used as the polarizing plate. In the measurement, a black mask with a 1 cm square hole was applied to the measurement portion in order to block unnecessary light.

  Prior to the examples, the binder resin (B) solutions used in the examples and comparative examples, the pigment (A1) represented by the formula (1), the refined pigment, and the method for producing the pigment dispersion will be described.

<Method for producing binder resin (B) solution>
[Alkali-soluble photosensitive resin (B1-1)]
A separable four-necked flask equipped with a thermometer, a cooling pipe, a nitrogen gas introduction pipe, a dropping pipe and a stirring device was charged with 370 parts of cyclohexanone, heated to 80 ° C., and the atmosphere in the flask was replaced with nitrogen. 18 parts of milphenol ethylene oxide modified acrylate (Aronix M110 manufactured by Toagosei Co., Ltd.), 10 parts of benzyl methacrylate, 18.2 parts of glycidyl methacrylate, 25 parts of methyl methacrylate, and 2,2′-azobisisobutyronitrile 2.0 Part of the mixture was added dropwise over 2 hours. After dropping, the reaction was further carried out at 100 ° C. for 3 hours, and then 1.0 part of azobisisobutyronitrile dissolved in 50 parts of cyclohexanone was added, and the reaction was further continued at 100 ° C. for 1 hour. Next, the inside of the container was replaced with air, 0.5 parts of trisdimethylaminophenol and 0.1 part of hydroquinone were added to 9.3 parts of acrylic acid (equivalent of glycidyl group), and 6 parts at 120 ° C. The reaction was continued for a period of time, and the reaction was terminated when the acid value of the solid content reached 0.5 to obtain an acrylic resin solution. Further, 19.5 parts of tetrahydrophthalic anhydride (equivalent of generated hydroxyl group) and 0.5 parts of triethylamine were added and reacted at 120 ° C. for 3.5 hours to obtain an acrylic resin solution.
After cooling to room temperature, about 2 g of the resin solution was sampled, heated and dried at 180 ° C. for 20 minutes to measure the nonvolatile content, and PGMEA was added to the previously synthesized resin solution so that the nonvolatile content was 20 wt%. Thus, an alkali-soluble photosensitive resin (B1-1) solution was obtained. The weight average molecular weight (Mw) was 19000.

[Acrylic resin solution 1]
370 parts of cyclohexanone was put in a reaction vessel, heated to 80 ° C. while injecting nitrogen gas into the vessel, 20.0 parts of methacrylic acid, 10.0 parts of methyl methacrylate, 55.0 parts of n-butyl methacrylate at the same temperature, A mixture of 15.0 parts of 2-hydroxyethyl methacrylate and 4.0 parts of 2,2′-azobisisobutyronitrile was added dropwise over 1 hour to carry out a polymerization reaction. After completion of the dropwise addition, the mixture was further reacted at 80 ° C. for 3 hours, and then 1.0 part of azobisisobutyronitrile dissolved in 50 parts of cyclohexanone was added, and the reaction was further continued at 80 ° C. for 1 hour. A resin solution was obtained.
After cooling to room temperature, about 2 g of acrylic resin solution was sampled and heated and dried at 180 ° C. for 20 minutes to measure the nonvolatile content. Cyclohexanone was added to the previously synthesized acrylic resin solution so that the nonvolatile content was 20% by weight. This was added to obtain an acrylic resin solution 1. The weight average molecular weight (Mw) was 40000.

<Method for producing pigment (A1) represented by formula (1)>
First, in a stainless steel reaction vessel equipped with a reflux tube, 200 parts of tert-amyl alcohol dehydrated with molecular sieves and 140 parts of sodium tert-amyl alkoxide were added in a nitrogen atmosphere and heated to 100 ° C. with stirring to produce an alcoholate. A solution was prepared. On the other hand, 88 parts of diisopropyl succinate and 153.6 parts of 4-bromobenzonitrile were added to a glass flask and dissolved by heating to 90 ° C. with stirring to prepare a solution of these mixtures. The heated solution of the mixture was slowly dropped into the alcoholate solution heated to 100 ° C. at a constant rate over 2 hours with vigorous stirring. After completion of the dropwise addition, heating and stirring were continued for 2 hours at 90 ° C. to obtain an alkali metal salt of a diketopyrrolopyrrole compound. Furthermore, 600 parts of methanol, 600 parts of water and 304 parts of acetic acid were added to a reaction vessel with a glass jacket, and cooled to -10 ° C. While cooling this mixture with a high-speed stirring disperser and rotating a shear disk having a diameter of 8 cm at 4000 rpm, the alkali metal salt of the diketopyrrolopyrrole compound obtained above was cooled to 75 ° C. The solution was added in small portions. At this time, the rate of addition of the alkali metal salt of the diketopyrrolopyrrole compound at 75 ° C. while cooling so that the temperature of the mixture consisting of methanol, acetic acid and water is always kept at −5 ° C. or lower. Was added in small portions over approximately 120 minutes. After addition of the alkali metal salt, red crystals were precipitated to form a red suspension. Subsequently, the obtained red suspension was washed with an ultrafiltration device at 5 ° C. and then filtered to obtain a red paste. This paste was re-dispersed in 3500 parts of methanol cooled to 0 ° C. to make a suspension with a methanol concentration of about 90%, and stirred at 5 ° C. for 3 hours to perform particle sizing and washing with crystal transition. Subsequently, the water paste of the diketopyrrolopyrrole compound obtained by filtration with an ultrafiltration machine was dried at 80 ° C. for 24 hours, and pulverized with the pigment (A1) represented by the formula (1). 150.8 parts of a brominated diketopyrrolopyrrole pigment 1 were obtained.

[Brominated diketopyrrolopyrrole pigment (A1-1)]
Brominated diketopyrrolopyrrole pigment 1 was charged into 100.0 parts, 1000 parts of sodium chloride, and 120 parts of diethylene glycol, and a 1 gallon kneader (manufactured by Inoue Seisakusho), and kneaded at 60 ° C. for 2 hours. Next, the kneaded mixture is poured into warm water, stirred for 1 hour while heating to about 80 ° C. to form a slurry, filtered and washed with water to remove salt and diethylene glycol, and then dried at 80 ° C. for 24 hours, and then pulverized. As a result, 96.5 parts of a brominated diketopyrrolopyrrole pigment (A1-1) represented by the formula (1) was obtained. The average primary particle diameter was 65 nm, and the specific surface area was 30 m ² / g.

[Brominated diketopyrrolopyrrole pigment (A1-2)]
100.0 parts of brominated diketopyrrolopyrrole pigment 1, 1000 parts of sodium chloride and 120 parts of diethylene glycol were charged into a stainless steel 1 gallon kneader (manufactured by Inoue Seisakusho) and kneaded at 60 ° C. for 4 hours. Next, the kneaded mixture is poured into warm water, stirred for 1 hour while heating to about 80 ° C. to form a slurry, filtered and washed with water to remove salt and diethylene glycol, and then dried at 80 ° C. for 24 hours, and then pulverized. As a result, 96.6 parts of brominated diketopyrrolopyrrole pigment (A1-2) was obtained. The average primary particle diameter was 55 nm, and the specific surface area was 45 m ² / g.

[Brominated diketopyrrolopyrrole pigment (A1-3)]
100.0 parts of brominated diketopyrrolopyrrole pigment 1, 1000 parts of sodium chloride and 120 parts of diethylene glycol were charged into a stainless steel 1 gallon kneader (manufactured by Inoue Seisakusho) and kneaded at 60 ° C. for 8 hours. Next, the kneaded mixture is poured into warm water, stirred for 1 hour while heating to about 80 ° C. to form a slurry, filtered and washed with water to remove salt and diethylene glycol, and then dried at 80 ° C. for 24 hours, and then pulverized. As a result, 96.5 parts of brominated diketopyrrolopyrrole pigment (A1-3) was obtained. The average primary particle diameter was 38 nm, and the specific surface area was 80 m ² / g.

[Brominated diketopyrrolopyrrole pigment (A1-4)]
Brominated diketopyrrolopyrrole pigment 1 (100.0 parts), sodium chloride (1000 parts) and diethylene glycol (120 parts) were charged into a stainless steel 1 gallon kneader (Inoue Seisakusho) and kneaded at 60 ° C. for 12 hours. Next, the kneaded mixture is poured into warm water, stirred for 1 hour while heating to about 80 ° C. to form a slurry, filtered and washed with water to remove salt and diethylene glycol, and then dried at 80 ° C. for 24 hours, and then pulverized. As a result, 96.2 parts of a brominated diketopyrrolopyrrole pigment (A1-4) was obtained. The average primary particle size was 30 nm, and the specific surface area was 120 m ² / g.

[Brominated diketopyrrolopyrrole pigment (A1-5)]
Brominated diketopyrrolopyrrole pigment 1 (100.0 parts), sodium chloride (1000 parts) and diethylene glycol (120 parts) were charged into a stainless steel 1 gallon kneader (manufactured by Inoue Seisakusho) and kneaded at 60 ° C. for 24 hours. Next, the kneaded mixture is poured into warm water, stirred for 1 hour while heating to about 80 ° C. to form a slurry, filtered and washed with water to remove salt and diethylene glycol, and then dried at 80 ° C. for 24 hours, and then pulverized. As a result, 96.2 parts of a brominated diketopyrrolopyrrole pigment (A1-5) was obtained. The average primary particle diameter was 19 nm, and the specific surface area was 180 m ² / g.

[Brominated diketopyrrolopyrrole pigment (A1-6)]
Brominated diketopyrrolopyrrole pigment 1 (100.0 parts), sodium chloride (1000 parts), and diethylene glycol (120 parts) were charged in a stainless gallon kneader (manufactured by Inoue Seisakusho) and kneaded at 60 ° C. for 48 hours. Next, the kneaded mixture is poured into warm water, stirred for 1 hour while heating to about 80 ° C. to form a slurry, filtered and washed with water to remove salt and diethylene glycol, and then dried at 80 ° C. for 24 hours, and then pulverized. As a result, 96.2 parts of a brominated diketopyrrolopyrrole pigment (A1-6) was obtained. The average primary particle diameter was 9 nm, and the specific surface area was 270 m ² / g.

Table 1 shows the contents of the produced brominated diketopyrrolopyrrole pigment (A1-1 to 6).

アクリル樹脂溶液１ ５．８３部
シクロヘキサノン ８１．６０部 <Method for producing pigment dispersion>
[Pigment dispersion (P-1)]
After the mixture having the following composition is stirred and mixed uniformly, the mixture is dispersed for 5 hours with an Eiger mill (“Mini Model M-250 MKII” manufactured by Eiger Japan) using zirconia beads having a diameter of 1 mm, and then filtered through a 5 μm filter. A red pigment dispersion (P-1) was obtained.

Brominated diketopyrrolopyrrole pigment (A1-1) 8.78 parts acidic resin type pigment dispersant 1.74 parts (BYK-111 manufactured by BYK Japan KK)
Diketopyrrolopyrrole pigment derivative 2.05 parts Derivative 1

Acrylic resin solution 1 5.83 parts Cyclohexanone 81.60 parts

[Pigment dispersion (P-2)]
The red pigment dispersion (P-) is the same as the red pigment dispersion (P-1) except that the brominated diketopyrrolopyrrole pigment (A1-1) is changed to the brominated diketopyrrolopyrrole pigment (A1-2). 2) was obtained.

[Pigment dispersion (P-3)]
A red pigment dispersion (P-) was prepared in the same manner as the red pigment dispersion (P-1) except that the brominated diketopyrrolopyrrole pigment (A1-1) was changed to a brominated diketopyrrolopyrrole pigment (A1-3). 3) was obtained.

[Pigment dispersion (P-4)]
A red pigment dispersion (P-) was prepared in the same manner as the red pigment dispersion (P-1) except that the brominated diketopyrrolopyrrole pigment (A1-1) was changed to a brominated diketopyrrolopyrrole pigment (A1-4). R4) was obtained.

[Pigment dispersion (P-5)]
A pigment dispersion (P-5) was prepared in the same manner as the red pigment dispersion (P-1) except that the brominated diketopyrrolopyrrole pigment (A1-1) was changed to a brominated diketopyrrolopyrrole pigment (A1-5). )

[Pigment dispersion (P-6)]
The red pigment dispersion (P-) was changed in the same manner as the red pigment dispersion (P-1) except that the brominated diketopyrrolopyrrole pigment (A1-1) was changed to the brominated diketopyrrolopyrrole pigment (A1-6). 6) was obtained.

[Pigment dispersion (P-7)]
A red pigment except that the brominated diketopyrrolopyrrole pigment (A1-1) is changed to a chlorinated diketopyrrolopyrrole pigment (CI Pigment Red 254; “Irga Four Red B-CF” manufactured by Ciba Japan). Red pigment dispersion (P-7) was obtained in the same manner as dispersion (P-1).

アクリル樹脂溶液１ ５．８３部
シクロヘキサノン ８１．６０部 [Pigment dispersion (P-8)]
After the mixture having the following composition is stirred and mixed uniformly, the mixture is dispersed for 5 hours with an Eiger mill (“Mini Model M-250 MKII” manufactured by Eiger Japan) using zirconia beads having a diameter of 1 mm, and then filtered through a 5 μm filter. A pigment dispersion (P-8) was obtained.

Brominated diketopyrrolopyrrole pigment (A1-3) 6.82 parts Anthraquinone pigment (CI Pigment Red 177) 1.08 parts (Chromotar Red A2B manufactured by Ciba Japan)
Nickel azo complex pigment (CI Pigment Yellow 150) 0.88 parts ("E4GN" manufactured by LANXESS)
Acidic resin type pigment dispersant 1.74 parts (“Solsperse 21000” manufactured by Nippon Lubrizol)
Pigment derivative 1 2.05 parts Derivative 1

Acrylic resin solution 1 5.83 parts Cyclohexanone 81.60 parts

[Pigment dispersion (P-9 to 20)]
The pigment dispersion (P-9 to 20) is the same as the pigment dispersion (P-8) except that the types and blending amounts of pigments, pigment derivatives, and resin-type pigment dispersants shown in Table 2 are changed. Got.

Abbreviations in Table 2 are described below.
<Pigment>
PR254; diketopyrrolopyrrole pigment C.I. I. Pigment Red 254
“Irga Four Red B-CF” manufactured by Ciba Japan
PO71; diketopyrrolopyrrole pigment C.I. I. Pigment Orange 71
“Irgazine DPP Orange 398” manufactured by Ciba Japan
PR242; azo pigment C.I. I. Pigment Red 242
"Novo Palm" manufactured by Clariant
PR179; perylene pigment C.I. I. Pigment Red 179
"First Gen Spa Maroon PSK" manufactured by Dainippon Ink & Chemicals, Inc.
PR122; quinacridone pigment C.I. I. Pigment Red 122
Clariant's “Hosta Palm”
PY180; benzimidazolone pigment C.I. I. Pigment Yellow 180
"PV First Yellow HG" manufactured by Clariant
PY138; quinoline pigment C.I. I. Pigment Yellow 180
BASF "Paliotor Yellow K0960-HD"

<Pigment derivative>
Derivative 2

誘導体３

Derivative 3

誘導体４

Derivative 4

[Example 1]
(Red coloring composition (DR-1))
A mixture having the following composition was stirred and mixed uniformly, and then filtered through a 5 μm filter to obtain a red colored composition (DR-1).

Red pigment dispersion (P- 1 ) 40.5 parts Alkali-soluble photosensitive resin (B1-1) 8.6 parts Cyclohexanone 50.9 parts

[Examples 2 to 6 and Comparative Example 1]
(Red coloring composition (DR-2 to 7))
The red colored composition (DR-2 to 7) is the same as the red colored composition (DR-1) except that the red pigment dispersion (P- 1 ) is changed to the red pigment dispersion shown in Table 3. Got.

[Comparative Example 2]
(Red coloring composition (DR-8))
A red colored composition (DR-8) was obtained in the same manner as the red colored composition (DR-1) except that the alkali-soluble photosensitive resin (B1-1) was changed to the acrylic resin solution 1.

[Evaluation of red coloring composition]
The color characteristics, contrast ratio (CR), and crystal precipitation on the coating film surface of the obtained red coloring composition were evaluated by the following methods. The results are shown in Table 3.

(Color characteristics, contrast ratio (CR) evaluation)
The obtained red coloring composition is formed on a 100 mm × 100 mm, 0.7 mm thick glass substrate so that x = 0.644 and y = 0.340 (within plus or minus 0.001) in a C light source. And dried in a hot air oven at 70 ° C. for 20 minutes, and further heated at 230 ° C. for 60 minutes to obtain a red coating film. Thereafter, the brightness (Y) and contrast ratio (CR) of the obtained coated substrate were measured.
The chromaticity was measured with a microspectrophotometer ("OSP-SP200" manufactured by Olympus Optical Co., Ltd.).

(Evaluation of crystal precipitation on the coating film surface)
The substrate obtained by color characteristic and contrast ratio (CR) evaluation was further subjected to heat treatment at 240 ° C. for 60 minutes twice. The coating film surface of the coated substrate after the heat treatment was observed with an optical microscope, and the presence or absence of crystal precipitation was determined according to the following criteria. In the evaluation results, ◎ and ○ are good without crystal precipitation, Δ is a level where there is crystal precipitation but no problem in use, and × corresponds to a state where it cannot be used due to crystal precipitation.

◎ ... After heat treatment at 230 ° C for 60 minutes, after further heat treatment at 240 ° C for 60 minutes,
No crystal precipitation even after further heat treatment at 240 ° C. for 60 minutes ○ No crystal precipitation after heat treatment at 230 ° C. for 60 minutes and further heat treatment at 240 ° C. for 60 minutes (there is crystal precipitation at the second heat treatment at 240 ° C. for 60 minutes) )
Δ: Crystal precipitation does not occur after heat treatment at 230 ° C. for 60 minutes, but there is crystal precipitation after further heat treatment at 240 ° C. for 60 minutes.

  The coloring composition for a color filter of the present invention containing the pigment (A1) represented by the formula (1) and the alkali-soluble photosensitive resin (B1) has a high brightness and a high contrast ratio. Good results were obtained that no crystal precipitation of ketopyrrolopyrrole pigments occurred.

[Examples 7 to 41, Comparative Examples 3 to 5]
(Photosensitive coloring composition)
Each material was mixed and stirred with the compositions and blending amounts shown in Tables 4 to 9, and filtered through a 1 μm filter to obtain a photosensitive colored composition.

Abbreviations in Tables 4 to 9 are shown below.
<Photopolymerization initiator (D)>
Photoinitiator D1: 2-methyl-1- [4- (methylthio) phenyl] -2-morpholino
Propan-1-one
("Irgacure 907" manufactured by Ciba Japan)
Photopolymerization initiator D2: 2- (dimethylamino) -2-[(4-methylphenyl) methyl] -1
-[4- (4-morpholinyl) phenyl] -1-butanone
("Irgacure 379" manufactured by Ciba Japan)
Photopolymerization initiator D3: ethane-1-one, 1- [9-ethyl-6- (2-methylbenzoy)
) -9H-carbazol-3-yl], 1- (O-acetyloxime)
("Irgacure OXE02" manufactured by Ciba Japan)
Photopolymerization initiator D4: 2,2′-bis (o-chlorophenyl) -4,5,4 ′, 5′-tetra
Phenyl-1,2'-biimidazole
(Kurokin Kasei Co., Ltd. “Biimidazole”)
Photopolymerization initiator D5: 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxy
side
("Lucirin TPO" manufactured by BASF)
<Sensitizer>
Sensitizer E1: 2,4-Diethylthioxanthone
(“Kayacure DETX-S” manufactured by Nippon Kayaku Co., Ltd.)
Sensitizer E2: 4,4'-bis (diethylamino) benzophenone
("EAB-F" manufactured by Hodogaya Chemical Co., Ltd.)

<Photopolymerizable compound>
Photopolymerizable compound: Dipentaerythritol hexaacrylate
("Aronix M-402" manufactured by Toagosei Co., Ltd.)
<Multifunctional thiol>
Multifunctional thiol F1: trimethylolethane tris (3-mercaptobutyrate)
("TEMB" manufactured by Showa Denko KK)
Multifunctional thiol F2: trimethylolpropane tri (3-mercaptobutyrate)
("TPMB" manufactured by Showa Denko KK)
Multifunctional thiol F3: pentaerythritol tetrakis (3-mercaptopropionate)
(“PEMP” manufactured by Sakai Chemical Industry Co., Ltd.)

<Ultraviolet absorber>
UV absorber G1: 2- [4-[(2-hydroxy-3- (dodecyl and tridecyl))
Oxypropyl) oxy] -2-hydroxyphenyl] -4,6-bis
(2,4-Dimethylphenyl) -1,3,5-triazine
("TINUVIN400" manufactured by Ciba Japan)
UV absorber G2: 2- (2H-benzotriazol-2-yl) -4,6-bis (1-
Methyl-1-phenylethyl) phenol
("TINUVIN900" manufactured by Ciba Japan)

<Polymerization inhibitor>
Polymerization inhibitor H1: N-nitrosophenylhydroxylamine aluminum salt
("Q-1301" manufactured by Wako Pure Chemical Industries, Ltd.)
Polymerization inhibitor H2: Methylhydroquinone
(“MH” manufactured by Seiko Chemical Co., Ltd.)

<Storage stabilizer>
Storage stabilizer J1: 2,6-bis (1,1-dimethylethyl) -4-methylphenol
("BHT" manufactured by Honshu Chemical Industry Co., Ltd.)
Storage stabilizer J2: Triphenylphosphine
("TPP" manufactured by Hokuko Chemical Co., Ltd.)
<Solvent>
Organic solvent: cyclohexanone

[Evaluation of photosensitive coloring composition]
About the obtained photosensitive coloring composition, color characteristics, contrast ratio (CR), crystal precipitation on the coating film surface, sensitivity, linearity, pattern shape, resolution, development resistance, chemical resistance, and stability over time are as follows. evaluated. The results are shown in Table 10. In the evaluation results, ◎ is a very good level, ◯ is a good level, Δ is a level that does not interfere with use, and x is a level that is not preferable for use.

(Color characteristics, contrast ratio (CR) evaluation)
The obtained photosensitive coloring composition was applied on a glass substrate having a thickness of 100 mm × 100 mm and a thickness of 0.7 mm so that x = 0.640 and y = 0.328 after post-processing with a C light source. After drying in a hot air oven at 70 ° C. for 20 minutes, using an ultra-high pressure mercury lamp, UV exposure was performed with an integrated light quantity of 150 mJ, followed by heating at 230 ° C. for 1 hour and cooling to obtain a red coating film. Thereafter, the brightness (Y) and contrast ratio (CR) of the obtained coated substrate were measured.
The chromaticity was measured with a microspectrophotometer ("OSP-SP200" manufactured by Olympus Optical Co., Ltd.).

(Evaluation of crystal precipitation on the coating film surface)
The substrate obtained by color characteristics and contrast ratio (CR) evaluation was further heated at 260 ° C. for 1 hour and allowed to cool. The coating film surface of the coated substrate after the heat treatment was observed with an optical microscope, and the presence or absence of crystal precipitation was determined according to the following criteria. In the evaluation results, ◎ is very good without crystal precipitation, ○ is a good level with some crystal precipitation, △ is a level with no crystal precipitation, but × is used due to crystal precipitation. This is equivalent to a state in which it is impossible.
The number of crystals is 0: ◎, 1-10: ◯, 10-100: Δ, 100 or more: x.

◎ ・ ・ ・ Number of crystals ◯ ・ ・ ・ Number of crystals 1 or more and less than 10 △ ・ ・ ・ Number of crystals 10 or more and less than 100 × ・ ・ ・ Number of crystals 100 or more

(Sensitivity, linearity, pattern shape, resolution, development resistance, chemical resistance evaluation)
After coating the obtained photosensitive coloring composition on a 100 mm × 100 mm, 0.7 mm thick glass substrate, the solvent was removed by heating at 70 ° C. for 20 minutes in a clean oven to form a coating film of about 2 μm. Obtained. Next, the substrate was cooled to room temperature, and then exposed to ultraviolet rays through a photomask having a stripe pattern of 100 μm width (pitch 200 μm) and 25 μm width (pitch 50 μm) using an ultrahigh pressure mercury lamp. Thereafter, this substrate was spray-developed using a sodium carbonate aqueous solution at 23 ° C., washed with ion-exchanged water, air-dried, and heated at 230 ° C. for 330 minutes in a clean oven. The spray development was performed in the shortest time during which a pattern can be formed without any development remaining on the coating film of each photosensitive coloring composition, and this was set as an appropriate development time.
The film thickness of the coating film was determined using Dektak 3030 (manufactured by Nippon Vacuum Technology Co., Ltd.).

(Sensitivity evaluation)
The pattern film thickness in the 100 μm photomask portion of the filter segment formed by the above method was measured, and the minimum exposure amount that was 90% or more with respect to the film thickness after coating was evaluated. The smaller the minimum exposure, the higher the sensitivity and the better the photosensitive coloring composition.
The rank of evaluation is as follows.
○: Less than 50 mJ / cm ² Δ: 50 mJ / cm ² or more and less than 100 mJ / cm ² ×: 100 mJ / cm ² or more

(Linearity evaluation)
The pattern at the 100 μm photomask portion of the filter segment formed by the above method was evaluated by observation using an optical microscope. The rank of evaluation is as follows.
○: Good linearity △: Partially poor linearity ×: Poor linearity

(Pattern shape evaluation)
The cross section of the pattern at the 100 μm photomask portion of the filter segment formed by the above method was evaluated by observation using an electron microscope. The pattern cross section has good forward taper. The rank of evaluation is as follows.
○: Cross section is forward tapered shape ×: Cross section is reverse tapered shape

(Resolution evaluation)
The pattern in the 25 μm photomask portion of the filter segment formed by the above method was evaluated by observing with an optical microscope. The rank of evaluation is as follows. The poor resolution means that adjacent stripe patterns are connected or chipped. The rank of evaluation is as follows.
◎: Good resolution and linearity ○: Slightly inferior in linearity but good resolution △: Partially poor resolution ×: Poor resolution

(Development resistance evaluation)
During spray development, the pattern film thickness in the 100 μm photomask portion of the filter segment formed by developing twice the appropriate time was measured and compared with the pattern film thickness formed by developing in the appropriate development time. . The rank of evaluation is as follows.
◎: Within 20% difference in film thickness ○: Over 20% difference in film thickness, within 40% △: Over 40% difference in film thickness ×: Chipping or peeling occurs during double development

(Chemical resistance evaluation)
The filter segment formed by the above method was immersed in an N-methylpyrrolidone solution for 30 minutes, then washed with ion-exchanged water, air-dried, and the pattern on the 100 μm photomask portion was observed and evaluated using an optical microscope. The rank of evaluation is as follows.
◎: Good with no change in appearance and color ○: Some wrinkles are generated, but good with no change in color △: Slight color loss occurs ×: Peeling or color loss occurs

(Evaluation of aging stability of colored composition)
About the obtained photosensitive coloring composition, the viscosity of the initial stage and 1 month after room temperature was measured, and the viscosity increase degree with respect to an initial stage viscosity was calculated and evaluated. The rank of evaluation is as follows.
(Change in viscosity with time) = | [(initial viscosity) − (viscosity with time)] / (initial viscosity) | × 100 (%)
◎: Viscosity increase rate is 5% or less, good ○: Viscosity increase rate is greater than 5% and less than 10% ×: Viscosity increase rate is greater than 10%

As shown in Table 10, the colored composition for color filter of the present invention containing the pigment (A1) and the photosensitive resin (B1) represented by the formula (1) obtained high-level evaluation results in all evaluations. .

(Manufacture of color filters)
A total of 4.54 parts of the pigment and the pigment derivative in the photosensitive coloring composition (RR-1) was compared with C.I. I. Pigment Green 58 / C.I. I. Pigment Yellow 150 = 2.72 parts / 1.82 parts, and the blue photosensitive coloring composition contains C.I. I. Pigment Blue 15: 6 / C.I. I. Pigment Violet 23 = 3.63 parts / 0.91 parts except that the pigment dispersion was prepared in the same manner as the pigment dispersion (P-3) except that the pigment dispersion (P-3) was used. Further, the photosensitive coloring composition (RR-1) The pigment dispersion was replaced with each color pigment dispersion to obtain a green photosensitive coloring composition for a color filter and a blue photosensitive coloring composition for a color filter.

The photosensitive coloring composition (RR-1) was applied on a 100 mm × 100 mm glass substrate with a die coater to a thickness of about 2 μm, and the solvent was removed and dried in an oven at 70 ° C. for 20 minutes. Subsequently, stripe pattern exposure was performed with ultraviolet rays using an exposure apparatus. The exposure amount was 100 mJ / cm ² . Furthermore, after spray development with a developer composed of an aqueous sodium carbonate solution to remove unexposed portions, the substrate is washed with ion-exchanged water, and this substrate is heated at 230 ° C. for 30 minutes to form a red filter segment having a line width of about 50 μm. did. Next, in the same manner, a green filter segment is formed using the green photosensitive coloring composition next to the red filter segment, and then a blue filter segment is formed using the blue photosensitive coloring composition. A color filter comprising a color filter segment was obtained.

  When the coloring composition for a color filter in the present invention is used, a high-definition color filter having a red filter segment having excellent color characteristics in a wide chromaticity range and good heat resistance can be produced.

Claims (4)

A coloring composition for a color filter comprising a pigment (A), a binder resin (B), and a solvent, wherein the pigment (A) comprises the pigment (A1) represented by the formula (1), and the binder resin (B )But,
It contains at least methyl (meth) acrylate or alkali-soluble photosensitive resin (B1) having ethyl (meth) acrylate as a precursor , and the solid content concentration in the color filter coloring composition is 9.8 to 19.7 wt. %, The coloring composition for color filters characterized by the above-mentioned.
Formula (1):

  The pigment (A) further comprises a diketopyrrolopyrrole pigment other than the pigment (A1), an azo pigment, an anthraquinone pigment, a perylene pigment, a quinacridone pigment, a benzimidazolone pigment, and a quinoline pigment. The coloring composition for a color filter according to claim 1, comprising at least one selected from the above.   Furthermore, at least 1 or more types of photoinitiators (D1) chosen from the group which consists of an acetophenone type compound, a phosphine type compound, an imidazole type compound, and an oxime ester type compound are included, The 1 or 2 characterized by the above-mentioned. Coloring compositions for color filters.   A color filter comprising a filter segment formed from the colored composition for a color filter according to any one of claims 1 to 3 on a substrate.