JP5298570B2 - Photopolymerization initiator, polymerizable composition, and method for producing polymer. - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new photopolymerization initiator curing by a small amount of addition and also by a small photo-irradiation energy, inhibiting the discoloration after the curing of the polymerizable composition, and the oozing out and volatilization of the photopolymerization initiator, and excellent in preservation stability over time, and a polymerizable composition by using the photopolymerization initiator. <P>SOLUTION: This photopolymerization initiator is expressed by general formula (1) or general formula (2) [wherein, R<SP>1</SP>to R<SP>8</SP>and R<SP>9</SP>to R<SP>15</SP>are each independently H or the like]. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a thioxanthone derivative that can be suitably used as a photopolymerization initiator, a polymerizable composition containing the derivative, and a method for producing the polymer. More specifically, the present invention relates to a material and a method capable of obtaining a polymer having good physical properties by polymerizing a polymerizable composition in a short time and reliably by using the photopolymerization initiator of the present invention. Molding resins, casting resins, stereolithography resins, sealants, dental polymerization resins, printing inks, inkjet inks, paints, printing plate photosensitive resins, printing color proofs, color filter resists, black matrix resists , LCD photo spacers, rear projection screen materials, optical fibers, plasma display ribs, dry film resists, printed circuit board resists, solder resists, semiconductor photoresists, microelectronics resists, micromachined parts manufacturing resists, etching Resist, microlens lens -Insulating materials, hologram materials, optical switches, waveguide materials, overcoat agents, powder coatings, adhesives, adhesives, release agents, optical recording media, adhesives, release coating agents, microcapsules Compositions for image recording materials, novel photopolymerization initiators for obtaining polymers having good physical properties in the fields of various devices, polymerizable compositions, and polymerization using the polymerizable compositions The present invention relates to a method for manufacturing a product.

  A photopolymerization initiator is used to cure a polymerizable composition containing acrylate or the like by irradiation with UV light, and a sensitizer is used to obtain a highly hard film in a shorter time. Yes. These photopolymerization initiators and sensitizers are used in a wide range of fields, and commercially available photopolymerization initiators and sensitizers are described in “Photopolymer List”, pages 55 to 72, 1996. Year (Bunshin Publishing), “Latest UV Curing Handbook”, 1-50 pages, 2005 (Technical Information Association), etc.

  Thioxanthone derivatives are widely known as conventional photopolymerization initiators. The thioxanthone derivative is sometimes referred to as a sensitizer because a synergistic effect is observed in curability when used in combination with other photopolymerization initiators. Among thioxanthone derivatives, particularly, 2-chlorothioxanthone, 2- (or 4-) isopropylthioxanthone, 2,4-diethylthioxanthone, and the like can be used to obtain a polymerizable composition having high curability. Derivatives are used in polymerizable compositions in various fields. In order to further improve the curability of these thioxanthone derivatives, novel thioxanthone derivatives have been proposed (Patent Documents 1 to 3).

  In addition, in a polymerizable composition using a photopolymerization initiator of the prior art, since the photopolymerization initiator and other compositions bleed out and volatilize from the polymerizable composition after curing, in recent years. It is a big problem. The problem of seepage and volatilization of the photopolymerization initiator that occurs from the polymerizable composition cured after light irradiation not only damages the coating material but also the environment of the coating site, and further degrades the performance of the coating material. Because of this, improvement is needed. Therefore, by introducing a radically polymerizable polymerizable group into the photopolymerization initiator or using a high molecular weight photopolymerization initiator, it is possible to improve the bleeding and volatilization of the photopolymerization initiator after curing the polymerizable composition. Proposed (Patent Documents 4 to 9).

  In the polymerizable composition using these photopolymerization initiators, the bleeding and volatilization of the photopolymerization initiator that occurs from the cured polymerizable composition can be suppressed as compared with conventionally known photopolymerization initiators. Various problems occur in addition to the bleeding and volatilization of the polymerization initiator. Among them, in particular, there are problems of insufficient curability and solvent resistance of the polymerizable composition and coloring problems such as yellowing due to the photopolymerization initiator after curing of the polymerizable composition. The problem of insufficient curability of the polymerizable composition is that it becomes difficult to obtain a film having a high hardness in a short time with the polymerizable composition, and to some extent by increasing the amount of addition of the photopolymerization initiator. However, since it is often difficult to obtain desired physical properties of the polymerizable composition, further improvements in curability and solvent resistance are desired. In addition, the problem of coloring due to the photopolymerization initiator after curing of the polymerizable composition is not preferable because the color tone of the polymerizable composition is impaired, and further, the use of the polymerizable composition may be limited. Therefore, suppression of coloring is desired as much as possible.

JP 58-32602 A JP 59-208541 A JP-A-61-34057 JP-A-4-26687 Japanese Patent Laid-Open No. 8-151404 WO 97/49664 Pamphlet JP 2004-224993 A JP-T-2005-512973 JP 2006-28514 A

  The polymerizable composition containing these conventionally known photopolymerization initiators can be used in various applications. However, from the viewpoint of cost reduction and productivity improvement, a material that can be cured with a small addition amount and a small light irradiation energy, that is, a highly sensitive material is required. On the other hand, in these polymerizable compositions, the photopolymerization initiator exudation or volatilization that occurs from the polymerizable composition after curing may damage the environment of the coated product or the coating site, or deteriorate the performance of the coated product. In this case, improvement is required. Further, since coloring such as yellowing after curing of the polymerizable composition becomes a problem, it is necessary to suppress coloring as much as possible. In the above-mentioned polymerizable composition, it is difficult to satisfy all requirements regarding curability / solvent resistance, oozing and volatilization of the photopolymerization initiator that occurs from the polymerizable composition, and coloring that occurs after the polymerizable composition is cured. is there. Further, depending on the type of photopolymerization initiator used, the storage stability of the polymerizable composition with time may be impaired. If the storage stability with time is low, not only will the curing of the polymerizable composition (curability / solvent resistance deficiency) be caused, but it may also cause a coating failure during coating of the polymerizable composition.

  Therefore, the object of the present invention is to cure with a small addition amount and a small amount of light irradiation energy, and it is possible to suppress coloration after the curing of the polymerizable composition and bleeding and volatilization of the photopolymerization initiator, and to improve storage stability over time. The present invention also provides a novel photopolymerization initiator that is also excellent and a polymerizable composition using the photopolymerization initiator.

As a result of intensive studies to solve the above problems in consideration of the above problems, the present inventors have reached the present invention. That is, the present invention is a photopolymerization initiator represented by the following following general formula (2).

General formula (2)

(In formula , R < ⁹ > -R < ¹⁵ > represents a hydrogen atom or following General formula (3) each independently . )

General formula (3)

(In the formula, R ¹⁶ represents a substituted or unsubstituted alkyl group having 2 or more carbon atoms.
A ¹ represents a divalent linking group. )

Furthermore, this invention relates to the said photoinitiator whose R < ⁹ > -R < ¹⁵ > is a hydrogen atom.

  Furthermore, this invention relates to the polymeric composition formed by containing the said photoinitiator (A) and a radically polymerizable compound (B).

  Furthermore, this invention relates to the manufacturing method of a polymer which polymerizes the said polymerizable composition by irradiating with light.

Photoinitiators of the present invention, by having a specific structure in which at least one introduced carbonyloxy group to thioxanthone, when compared to conventional thioxanthone derivatives, polymerized by radicals generated by the photopolymerization initiator It is possible to reliably cure the polymerizable composition in a shorter time, such as reaction and crosslinking reaction, and it occurs after bleeding and volatilization of the photopolymerization initiator that occurs from the cured polymerizable composition, and after the polymerizable composition is cured. Coloring can be suppressed, and as a result, it is possible to achieve a significant increase in sensitivity and improvement in characteristics of various applications using these reactions.

  Hereinafter, embodiments of the present invention will be described in detail.

First, the photopolymerization initiator (A) of the present invention will be described. Photoinitiators of the present invention has a structure represented by a general formula (2), by having this structure, compounds of the present invention functions as a highly sensitive material to light irradiation.

General formula (2)

(In formula , R < ⁹ > -R < ¹⁵ > represents a hydrogen atom or following General formula (3) each independently . )
General formula (3)

(In the formula, R ¹⁶ represents a substituted or unsubstituted alkyl group having 2 or more carbon atoms.
A ¹ represents a divalent linking group. )

Photoinitiator (A) of the present invention, within the range not inhibiting its properties, as shown to one general formula (2), it is possible to introduce a variety of substituents. By introducing a substituent, the photopolymerization initiator (A) of the present invention can be used by appropriately adjusting the absorption characteristics of energy rays such as the maximum absorption wavelength and transmittance, and the solubility in the resin or solvent used together.

R ⁹ to R ¹⁵ in one general formula (2) each independently represent a hydrogen atom or a general formula (3).

R ¹⁶ in the general formula (3) represents a substituted or unsubstituted alkyl group having 2 or more carbon atoms.

Here, the substituted or unsubstituted alkyl group having 2 or more carbon atoms in R ¹⁶ is a linear, branched, monocyclic or condensed polycyclic alkyl group having 2 to 18 carbon atoms, or 2 to 18 carbon atoms. And a linear, branched, monocyclic or condensed polycyclic alkyl group interrupted by one or more —O—. Specific examples of the linear, branched, monocyclic or condensed polycyclic alkyl group having 2 to 18 carbon atoms include ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, and nonyl. Group, decyl group, dodecyl group, octadecyl group, isopropyl group, isobutyl group, isopentyl group, sec-butyl group, tert-butyl group, sec-pentyl group, tert-pentyl group, tert-octyl group, neopentyl group, cyclopropyl Group, cyclobutyl group, cyclopentyl group, cyclohexyl group, adamantyl group, norbornyl group, boronyl group, 4-decylcyclohexyl group, and the like, but are not limited thereto. Specific examples of the linear or branched alkyl group having 2 to 18 carbon atoms and interrupted by one or more —O— include —CH ₂ —O—CH ₃ and —CH ₂ —CH. _2— O—CH ₂ —CH ₃ , —CH ₂ —CH ₂ —CH ₂ —O—CH ₂ —CH ₃ , — (CH ₂ —CH ₂ —O) _n1 —CH ₃ (where n1 is 1 to 8) ), — (CH ₂ —CH ₂ —CH ₂ —O) _m1 —CH ₃ (where m1 is an integer of 1 to 5), —CH ₂ —CH (CH ₃ ) —O—CH. Examples include _2- CH ₃ —, —CH ₂ —CH— (OCH ₃ ) _2, but are not limited thereto.

  Specific examples of the monocyclic or condensed polycyclic alkyl group having 2 to 18 carbon atoms and interrupted by one or more —O— include the following, but are not limited thereto. It is not a thing.

A ¹ in the general formula (2) represents a divalent linking group.

The divalent linking group in A ¹ is a substituted or unsubstituted alkylene group, a substituted or unsubstituted arylene group, a substituted or unsubstituted divalent heterocyclic group, a substituted or unsubstituted alkenylene group, Or a substituted or unsubstituted alkylene group, a substituted or unsubstituted arylene group, a substituted or unsubstituted divalent heterocyclic group, or an unsubstituted alkenylene group, and -O-, -S-, -CO- Represents a divalent linking group.

The substituted or unsubstituted alkylene group for A ¹ is a divalent group formed by removing one hydrogen atom from the same substituent as the substituted or unsubstituted alkyl group described for R ¹⁶ in formula (3). However, it is not limited to these.

Examples of the substituted or unsubstituted arylene group for A ¹ include a divalent group formed by removing one hydrogen atom from a monocyclic or condensed polycyclic aryl group having 6 to 24 carbon atoms. Specific examples of the monocyclic or condensed polycyclic aryl group having 6 to 24 carbon atoms include phenyl group, 1-naphthyl group, 2-naphthyl group, 1-anthryl group, 9-anthryl group, 2-phenanthryl group, 3- Phenanthryl group, 9-phenanthryl group, 1-pyrenyl group, 5-naphthacenyl group, 1-indenyl group, 2-azurenyl group, 1-acenaphthyl group, 2-fluorenyl group, 9-fluorenyl group, 3-perenyl group, o- Tolyl group, m-tolyl group, p-tolyl group, 2,3-xylyl group, 2,5-xylyl group, mesityl group, p-cumenyl group, p-dodecylphenyl group, p-cyclohexylphenyl group, 4-biphenyl Group, o-fluorophenyl group, m-chlorophenyl group, p-bromophenyl group, p-hydroxyphenyl group, m-carboxyphenyl group, o-me Mercapto phenyl group, p- cyanophenyl group, m- nitrophenyl group, may be such as m- azido phenyl group include, but are not limited thereto.

The substituted or unsubstituted divalent heterocyclic group for A ¹ is ^{one from} an aromatic or aliphatic heterocyclic group having 4 to 24 carbon atoms, including a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom. And a divalent group formed by removing a hydrogen atom. Specific examples of the aromatic or aliphatic heterocyclic group having 4 to 24 carbon atoms including a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom include a 2-thienyl group, a 2-benzothienyl group, and a naphtho [2 , 3-b] thienyl group, 3-thianthrenyl group, 2-thianthrenyl group, 2-furyl group, 2-benzofuryl group, pyranyl group, isobenzofuranyl group, chromenyl group, xanthenyl group, phenoxathiinyl group, 2H -Pyrrolyl group, pyrrolyl group, imidazolyl group, pyrazolyl group, pyridyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, indolizinyl group, isoindolyl group, 3H-indolyl group, 2-indolyl group, 3-indolyl group, 1H-indazolyl group , Purinyl group, 4H-quinolidinyl group, isoquinolyl group, quinolyl group, phthalazinyl group, naphthyl Nyl group, quinoxanilyl group, quinazolinyl group, cinnolinyl group, pteridinyl group, 4aH-carbazolyl group, 2-carbazolyl group, 3-carbazolyl group, β-carbolinyl group, phenanthridinyl group, 2-acridinyl group, perimidinyl group, phenidinyl group Nantrolinyl group, phenazinyl group, phenalsadinyl group, isothiazolyl group, phenothiazinyl group, isoxazolyl group, furazanyl group, 3-phenixazinyl group, isochromanyl group, chromanyl group, pyrrolidinyl group, pyrrolinyl group, imidazolidinyl group, imidazolinyl group, pyrazolidinyl group, Pyrazolinyl group, piperidyl group, piperazinyl group, indolinyl group, isoindolinyl group, quinuclidinyl group, morpholinyl group, thioxanthryl group, 4-quinolinyl group, 4-isoquinolyl group, 3-phenyl group Examples thereof include, but are not limited to, an enothiazinyl group, a 2-phenoxathiinyl group, and a 3-coumarinyl group.

The substituted or unsubstituted alkenylene group in A ¹ is a divalent group formed by removing one hydrogen atom from a linear, branched, monocyclic or condensed polycyclic alkenyl group having 2 to 18 carbon atoms. Can be mentioned. The linear, branched, monocyclic or condensed polycyclic alkenyl group having 2 to 18 carbon atoms may have a plurality of carbon-carbon double bonds in the structure. Specific examples thereof include a vinyl group. 1-propenyl group, allyl group, 2-butenyl group, 3-butenyl group, isopropenyl group, isobutenyl group, 1-pentenyl group, 2-pentenyl group, 3-pentenyl group, 4-pentenyl group, 1-hexenyl group 2-hexenyl group, 3-hexenyl group, 4-hexenyl group, 5-hexenyl group, cyclopentenyl group, cyclohexenyl group, 1,3-butadienyl group, cyclohexadienyl group, cyclopentadienyl group, etc. However, it is not limited to these.

Specific examples of a combination of a plurality of groups among the divalent linking groups in A ¹ are shown below, but are not limited thereto.

R ¹⁶ described above may be further substituted with other substituents. Examples of such other substituents include a hydroxyl group, a carboxyl group, a sulfone group, a sulfonyl chloride group, an amide group, a cyano group, and a nitro group. Halogen atom, alkyl group, aryl group, heterocyclic group, acyl group, alkoxyl group, aryloxy group, heterocyclic oxy group, acyloxy group, alkylthio group, arylthio group, heterocyclic thio group, amino group, alkylamino group, Examples thereof include a dialkylamino group, an arylamino group, a diarylamino group, an alkylarylamino group, a benzylamino group, a dibenzylamino group, an alkylsilyl group, and an alkoxysilyl group.

  Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.

Examples of the alkyl group include a linear, branched, monocyclic or condensed polycyclic alkyl group having 1 to 18 carbon atoms, or a linear chain having 2 to 18 carbon atoms and interrupted by one or more —O—. , Branched, monocyclic or condensed polycyclic alkyl groups. Specific examples of the linear, branched, monocyclic or condensed polycyclic alkyl group having 1 to 18 carbon atoms include methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group. Group, nonyl group, decyl group, dodecyl group, octadecyl group, isopropyl group, isobutyl group, isopentyl group, sec-butyl group, tert-butyl group, sec-pentyl group, tert-pentyl group, tert-octyl group, neopentyl group , Cyclopropyl group, cyclobutyl group, cyclopentyl group, cyclohexyl group, adamantyl group, norbornyl group, boronyl group, 4-decylcyclohexyl group and the like. Specific examples of the linear or branched alkyl group having 2 to 18 carbon atoms and interrupted by one or more —O— include —CH ₂ —O—CH ₃ and —CH ₂ —CH. _2— O—CH ₂ —CH ₃ , —CH ₂ —CH ₂ —CH ₂ —O—CH ₂ —CH ₃ , — (CH ₂ —CH ₂ —O) _n1 —CH ₃ (where n1 is 1 to 8) ), — (CH ₂ —CH ₂ —CH ₂ —O) _m1 —CH ₃ (where m1 is an integer of 1 to 5), —CH ₂ —CH (CH ₃ ) —O—CH. _{2 -CH 3 -, - CH 2} -CH- (OCH 3) 2 , and the like.

  Specific examples of the monocyclic or condensed polycyclic alkyl group having 2 to 18 carbon atoms and interrupted by one or more —O— include the following.

  Examples of the aryl group include monocyclic or condensed polycyclic aryl groups having 6 to 18 carbon atoms. Specific examples include a phenyl group, a 1-naphthyl group, a 2-naphthyl group, a 9-anthryl group, a 9-phenanthryl group, Examples include 1-pyrenyl group, 5-naphthacenyl group, 1-indenyl group, 2-azurenyl group, 1-acenaphthyl group, 9-fluorenyl group and the like.

  Examples of the heterocyclic group include a monocyclic or condensed polycyclic heterocyclic group having 4 to 18 carbon atoms, including a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom. Specific examples include a 2-furanyl group, 2 -Thienyl group, 2-indolyl group, 3-indolyl group, 2-benzofuryl group, 2-benzothienyl group, 2-carbazolyl group, 3-carbazolyl group, 4-carbazolyl group, 9-acridinyl group and the like can be mentioned.

  The acyl group includes a hydrogen atom, a carbonyl group to which a linear, branched, monocyclic or condensed polycyclic aliphatic group having 1 to 18 carbon atoms is bonded, or a monocyclic or condensed polyvalent group having 6 to 18 carbon atoms. Examples include a carbonyl group to which a cyclic aryl group is bonded, a carbonyl group to which a monocyclic or condensed polycyclic heterocyclic group having 4 to 18 carbon atoms is bonded, including a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom. It may have an unsaturated bond, and specific examples thereof include formyl group, acetyl group, propionyl group, butyryl group, isobutyryl group, valeryl group, isovaleryl group, pivaloyl group, lauroyl group, myristoyl group, palmitoyl group , Stearoyl group, cyclopentylcarbonyl group, cyclohexylcarbonyl group, acryloyl group, methacryloyl group, croto Yl group, isocrotonoyl group, oleoyl group, benzoyl group, 2-methylbenzoyl group, 4-methoxybenzoyl group, 1-naphthoyl group, 2-naphthoyl group, cinnamoyl group, 3-furoyl group, 2-thenoyl group, nicotinoyl group , Isonicotinoyl group, 9-anthroyl group, 5-naphthacenoyl group and the like.

Examples of the alkoxyl group include a straight chain, branched chain, monocyclic or condensed polycyclic alkoxyl group having 1 to 18 carbon atoms, or a group having 2 to 18 carbon atoms and interrupted by one or more —O—. Examples thereof include a chain, branched chain, monocyclic or condensed polycyclic alkoxyl group. Specific examples of the linear, branched, monocyclic or condensed polycyclic alkoxyl group having 1 to 18 carbon atoms include methoxy group, ethoxy group, propoxy group, butoxy group, pentyloxy group, hexyloxy group, heptyl Oxy group, octyloxy group, nonyloxy group, decyloxy group, dodecyloxy group, octadecyloxy group, isopropoxy group, isobutoxy group, isopentyloxy group, sec-butoxy group, tert-butoxy group, sec-pentyloxy group, tert -Pentyloxy group, tert-octyloxy group, neopentyloxy group, cyclopropyloxy group, cyclobutyloxy group, cyclopentyloxy group, cyclohexyloxy group, adamantyloxy group, norbornyloxy group, boronyloxy group, 4-decyl Cyclohexyl It can be given group and the like, but not limited thereto. Specific examples of the linear or branched alkoxyl group having 2 to 18 carbon atoms and interrupted by one or more —O— include —O—CH ₂ —O—CH ₃ , —O—. _{CH 2 -CH 2 -O-CH 2} -CH 3, -O-CH 2 -CH 2 -CH 2 -O-CH 2 -CH 3, -O- (CH 2 -CH 2 -O) n2 -CH 3 (Where n2 is an integer from 1 to 8), —O— (CH ₂ —CH ₂ —CH ₂ —O) _m2 —CH ₃ (where m2 is an integer from 1 to 5), —O— _{CH 2 -CH (CH 3) -O} -CH 2 -CH 3 -, - OCH 2 -CH- (OCH 3) can be cited _2, etc., but is not limited thereto.

  Specific examples of the monocyclic or condensed polycyclic alkoxyl group having 2 to 18 carbon atoms and interrupted by one or more —O— include the following.

  Examples of the aryloxy group include monocyclic or condensed polycyclic aryloxy groups having 6 to 18 carbon atoms. Specific examples include a phenoxy group, a 1-naphthyloxy group, a 2-naphthyloxy group, a 9-anthryloxy group, 9-phenanthryloxy group, 1-pyrenyloxy group, 5-naphthacenyloxy group, 1-indenyloxy group, 2-azurenyloxy group, 1-acenaphthyloxy group, 9-fluorenyloxy group, etc. It is done.

  Examples of the heterocyclic oxy group include a monocyclic or condensed polycyclic heterocyclic oxy group having 4 to 18 carbon atoms, including a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom, and specific examples include a 2-furanyloxy group. 2-thienyloxy group, 2-indolyloxy group, 3-indolyloxy group, 2-benzofuryloxy group, 2-benzothienyloxy group, 2-carbazolyloxy group, 3-carbazolyloxy group , 4-carbazolyloxy group, 9-acridinyloxy group and the like.

  The acyloxy group includes a carbonyloxy group to which a hydrogen atom or a linear, branched, monocyclic or condensed polycyclic aliphatic group having 1 to 18 carbon atoms is bonded, or a monocyclic or condensed group having 6 to 18 carbon atoms. A carbonyloxy group to which a monocyclic or condensed polycyclic heterocyclic group having 4 to 18 carbon atoms is bonded, including a carbonyloxy group to which a polycyclic aryl group is bonded, a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom; Specific examples include acetoxy group, propionyloxy group, butyryloxy group, isobutyryloxy group, valeryloxy group, isovaleryloxy group, pivaloyloxy group, lauroyloxy group, myristoyloxy group, palmitoyloxy group, stearoyloxy group, cyclopentyl Carbonyloxy group, cyclohexylcarbonyloxy group, black Noyloxy, isocrotonoyloxy, oleoyloxy, benzoyloxy, 1-naphthoyloxy, 2-naphthoyloxy, cinnamoyloxy, 3-furoyloxy, 2-thenoyloxy, nicotinoyloxy Group, isonicotinoyloxy group, 9-anthroyloxy group, 5-naphthacenoyloxy group and the like.

  Examples of the alkylthio group include a linear, branched, monocyclic or condensed polycyclic alkylthio group having 1 to 18 carbon atoms, and specific examples include a methylthio group, an ethylthio group, a propylthio group, a butylthio group, and a pentylthio group. Hexylthio group, octylthio group, decylthio group, dodecylthio group, octadecylthio group and the like.

  Examples of the arylthio group include monocyclic or condensed polycyclic arylthio groups having 6 to 18 carbon atoms, and specific examples thereof include a phenylthio group, a 1-naphthylthio group, a 2-naphthylthio group, a 9-anthrylthio group, and a 9-phenanthri group. And a ruthio group.

  Examples of the heterocyclic thio group include a monocyclic or condensed polycyclic heterocyclic thio group having 4 to 18 carbon atoms including a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom, and specific examples include a 2-furylthio group. 2-thienylthio group, 2-pyrrolylthio group, 6-indolylthio group, 2-benzofurylthio group, 2-benzothienylthio group, 2-carbazolylthio group, 3-carbazolylthio group, 4-carbazolylthio group and the like.

  Examples of the alkylamino group include methylamino group, ethylamino group, propylamino group, butylamino group, pentylamino group, hexylamino group, heptylamino group, octylamino group, nonylamino group, decylamino group, dodecylamino group, octadecylamino group Group, isopropylamino group, isobutylamino group, isopentylamino group, sec-butylamino group, tert-butylamino group, sec-pentylamino group, tert-pentylamino group, tert-octylamino group, neopentylamino group, Cyclopropylamino group, cyclobutylamino group, cyclopentylamino group, cyclohexylamino group, cycloheptylamino group, cyclooctylamino group, cyclododecylamino group, 1-adamantamino group, 2-adamantamino group, etc. It is below.

  Dialkylamino group includes dimethylamino group, diethylamino group, dipropylamino group, dibutylamino group, dipentylamino group, dihexylamino group, diheptylamino group, dioctylamino group, dinonylamino group, didecylamino group, didodecylamino group, Dioctadecylamino group, diisopropylamino group, diisobutylamino group, diisopentylamino group, methylethylamino group, methylpropylamino group, methylbutylamino group, methylisobutylamino group, cyclopropylamino group, pyrrolidino group, piperidino group, And piperazino group.

  As an arylamino group, an anilino group, 1-naphthylamino group, 2-naphthylamino group, o-toluidino group, m-toluidino group, p-toluidino group, 2-biphenylamino group, 3-biphenylamino group, 4- Biphenylamino group, 1-fluoreneamino group, 2-fluoreneamino group, 2-thiazoleamino group, p-terphenylamino group and the like can be mentioned.

  Examples of the diarylamino group include a diphenylamino group, a ditolylamino group, an N-phenyl-1-naphthylamino group, and an N-phenyl-2-naphthylamino group.

  Examples of the alkylarylamino group include N-methylanilino group, N-methyl-2-pyridino group, N-ethylanilino group, N-propylanilino group, N-butylanilino group, N-isopropyl, N-pentylanilino group, N -Ethylanilino group, N-methyl-1-naphthylamino group and the like.

  Examples of the alkylsilyl group include a trimethylsilyl group, a triethylsilyl group, an ethyldimethylsilyl group, a triisopropylsilyl group, a tributylsilyl group, a t-butyldimethylsilyl group, and a trioctylsilyl group.

  Examples of the alkoxysilyl group include a trimethoxysilyl group, a triethoxysilyl group, a triisopropoxysilyl group, a triphenoxysilyl group, a dimethoxymethylsilyl group, a diethoxymethylsilyl group, a methoxydimethylsilyl group, and an ethoxydimethylsilyl group. Can be mentioned.

  Specific examples of particularly preferred photopolymerization initiators described above are shown below, but the structure of the photopolymerization initiator of the present invention is not limited thereto.

  The synthesis method for obtaining the photopolymerization initiator of the present invention is not particularly limited, and the structure can be easily synthesized and confirmed by appropriately combining conventionally known chemical reactions, post-treatment methods, purification methods and analysis methods. Is possible. Methods for synthesizing thioxanthone derivatives are disclosed in JP-A-56-125383, JP-A-58-79991, JP-A-7-10829, European Patent No. 81280, or West German Patent No. 2504642. The photopolymerization initiator of the present invention can be synthesized by appropriately replacing the raw materials used in the synthesis described in the above.

Photoinitiators of the present invention, by having a specific structure in which at least one introduced carbonyloxy group to thioxanthone, when compared to conventional thioxanthone derivatives, polymerized by radicals generated by the photopolymerization initiator It is possible to reliably cure the polymerizable composition in a shorter time, such as reaction and crosslinking reaction, and it occurs after the photopolymerization initiator oozes and volatilizes from the polymerizable composition after curing, and after the polymerizable composition is cured. Coloring can be suppressed, and as a result, it is possible to achieve a significant increase in sensitivity and improvement in characteristics of various applications using these reactions. Below, the utilization method of the photoinitiator of this invention is described.

  The composition containing the photopolymerization initiator (A) and the radical polymerizable compound (B) of the present invention is cured quickly and reliably by irradiation with energy rays, particularly light in the wavelength region of 250 nm to 450 nm, and has good characteristics. It can be used as a polymerizable composition capable of obtaining a cured product having the above.

  The radical polymerizable compound (B) used in the polymerizable composition of the present invention will be described. The radically polymerizable compound (B) in the present invention means a compound having at least one skeleton capable of radical polymerization in the molecule. In addition, these have chemical forms of liquid or solid monomers, oligomers or polymers at normal temperature and normal pressure.

  Examples of such radically polymerizable compounds (B) include unsaturated carboxylic acids such as acrylic acid, methacrylic acid, itaconic acid, crotonic acid, isocrotonic acid, maleic acid and their salts, esters, acid amides and acid anhydrides. Further examples include urethane acrylates, acrylonitrile, styrene derivatives, various unsaturated polyesters, unsaturated polyethers, unsaturated polyamides, unsaturated polyurethanes, etc., but the present invention is not limited to these. Absent. Specific examples of the radically polymerizable compound (B) in the present invention are given below.

Examples of acrylates:
Examples of monofunctional alkyl acrylates:
Methyl acrylate, ethyl acrylate, propyl acrylate, isopropyl acrylate, butyl acrylate, isoamyl acrylate, hexyl acrylate, 2-ethylhexyl acrylate, octyl acrylate, decyl acrylate, lauryl acrylate, stearyl acrylate, isobornyl acrylate, cyclohexyl acrylate, dicyclopentenyl acrylate , Dicyclopentenyloxyethyl acrylate, benzyl acrylate.

Examples of monofunctional hydroxy acrylates:
2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 2-hydroxy-3-chloropropyl acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 2-hydroxy-3-allyloxypropyl acrylate, 2-acryloyloxyethyl-2 -Hydroxypropyl phthalate.

Examples of monofunctional halogenated acrylates:
2,2,2-trifluoroethyl acrylate, 2,2,3,3-tetrafluoropropyl acrylate, 1H-hexafluoroisopropyl acrylate, 1H, 1H, 5H-octafluoropentyl acrylate, 1H, 1H, 2H, 2H- Heptadecafluorodecyl acrylate, 2,6-dibromo-4-butylphenyl acrylate, 2,4,6-tribromophenoxyethyl acrylate, 2,4,6-tribromophenol 3EO addition acrylate.

Examples of monofunctional ether-containing acrylates:
2-methoxyethyl acrylate, 1,3-butylene glycol methyl ether acrylate, butoxyethyl acrylate, methoxytriethylene glycol acrylate, methoxypolyethylene glycol # 400 acrylate, methoxydipropylene glycol acrylate, methoxytripropylene glycol acrylate, methoxypolypropylene glycol acrylate, Ethoxydiethylene glycol acrylate, ethyl carbitol acrylate, 2-ethylhexyl carbitol acrylate, tetrahydrofurfuryl acrylate, phenoxyethyl acrylate, phenoxydiethylene glycol acrylate, phenoxy polyethylene glycol acrylate, cresyl polyethylene glycol acrylate, p Nonyl phenoxyethyl acrylate, p- nonylphenoxy polyethylene glycol acrylate, glycidyl acrylate.

Examples of monofunctional carboxyl acrylates:
β-carboxyethyl acrylate, succinic acid monoacryloyloxyethyl ester, ω-carboxypolycaprolactone monoacrylate, 2-acryloyloxyethyl hydrogen phthalate, 2-acryloyloxypropyl hydrogen phthalate, 2-acryloyloxypropyl hexahydrohydrogen phthalate, 2- Acryloyloxypropyltetrahydrophthalate.

Examples of other monofunctional acrylates:
N, N-dimethylaminoethyl acrylate, N, N-dimethylaminopropyl acrylate, morpholinoethyl acrylate, trimethylsiloxyethyl acrylate, diphenyl-2-acryloyloxyethyl phosphate, 2-acryloyloxyethyl acid phosphate, caprolactone-modified-2-acryloyl Oxyethyl acid phosphate.

Examples of bifunctional acrylates:
1,4-butanediol diacrylate, 1,6-hexanediol diacrylate, ethylene glycol diacrylate, diethylene glycol diacrylate, triethylene glycol diacrylate, tetraethylene glycol diacrylate, polyethylene glycol # 200 diacrylate, polyethylene glycol # 300 Diacrylate, polyethylene glycol # 400 diacrylate, polyethylene glycol # 600 diacrylate, dipropylene glycol diacrylate, tripropylene glycol diacrylate, tetrapropylene glycol diacrylate, polypropylene glycol # 400 diacrylate, polypropylene glycol # 700 diacrylate, neo Pentyl glycol diacrylate, ne Pentyl glycol PO modified diacrylate, hydroxypivalic acid neopentyl glycol ester diacrylate, caprolactone adduct diacrylate of hydroxypivalic acid neopentyl glycol ester, 1,6-hexanediol bis (2-hydroxy-3-acryloyloxypropyl) ether Bis (4-acryloxypolyethoxyphenyl) propane, 1,9-nonanediol diacrylate, pentaerythritol diacrylate, pentaerythritol diacrylate monostearate, pentaerythritol diacrylate monobenzoate, bisphenol A diacrylate, EO-modified bisphenol A diacrylate, PO-modified bisphenol A diacrylate, hydrogenated bisphenol A diacrylate EO modified hydrogenated bisphenol A diacrylate, PO modified hydrogenated bisphenol A diacrylate, bisphenol F diacrylate, EO modified bisphenol F diacrylate, PO modified bisphenol F diacrylate, EO modified tetrabromobisphenol A diacrylate, tricyclodecandi Methylol diacrylate, isocyanuric acid EO-modified diacrylate.

Examples of trifunctional acrylates:
Glycerin PO-modified triacrylate, trimethylolpropane triacrylate, trimethylolpropane EO-modified triacrylate, trimethylolpropane PO-modified triacrylate, isocyanuric acid EO-modified triacrylate, isocyanuric acid EO-modified ε-caprolactone-modified triacrylate, 1,3 5-triacryloylhexahydro-s-triazine, pentaerythritol triacrylate, dipentaerythritol triacrylate tripropionate.

Examples of tetra- or higher functional acrylates:
Pentaerythritol tetraacrylate, dipentaerythritol tetraacrylate, dipentaerythritol pentaacrylate monopropionate, dipentaerythritol hexaacrylate, tetramethylolmethane tetraacrylate, oligoester tetraacrylate, tris (acryloyloxy) phosphate.

Examples of methacrylates:
Examples of monofunctional alkyl methacrylates:
Methyl methacrylate, ethyl methacrylate, propyl methacrylate, isopropyl methacrylate, butyl methacrylate, isoamyl methacrylate, hexyl methacrylate, 2-hexyl methacrylate, 2-ethylhexyl methacrylate, octyl methacrylate, decyl methacrylate, lauryl methacrylate, stearyl methacrylate, isobornyl methacrylate, cyclohexyl methacrylate , Dicyclopentenyl methacrylate, dicyclopentenyloxyethyl methacrylate, benzyl methacrylate.

Examples of monofunctional hydroxymethacrylates:
2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 2-hydroxy-3-chloropropyl methacrylate, 2-hydroxy-3-phenoxypropyl methacrylate, 2-hydroxy-3-allyloxypropyl methacrylate, 2-methacryloyloxyethyl-2 -Hydroxypropyl phthalate.

Examples of monofunctional halogenated methacrylates:
2,2,2-trifluoroethyl methacrylate, 2,2,3,3-tetrafluoropropyl methacrylate, 1H-hexafluoroisopropyl methacrylate, 1H, 1H, 5H-octafluoropentyl methacrylate, 1H, 1H, 2H, 2H- Heptadecafluorodecyl methacrylate, 2,6-dibromo-4-butylphenyl methacrylate, 2,4,6-tribromophenoxyethyl methacrylate, 2,4,6-tribromophenol 3EO addition methacrylate.

Examples of monofunctional ether-containing methacrylates:
2-methoxyethyl methacrylate, 1,3-butylene glycol methyl ether methacrylate, butoxyethyl methacrylate, methoxytriethylene glycol methacrylate, methoxypolyethylene glycol # 400 methacrylate, methoxydipropylene glycol methacrylate, methoxytripropylene glycol methacrylate, methoxypolypropylene glycol methacrylate, Ethoxydiethylene glycol methacrylate, 2-ethylhexyl carbitol methacrylate, tetrahydrofurfuryl methacrylate, phenoxyethyl methacrylate, phenoxydiethylene glycol methacrylate, phenoxy polyethylene glycol methacrylate, cresyl polyethylene glycol methacrylate, p- Cycloalkenyl phenoxyethyl methacrylate, p- nonylphenoxy polyethylene glycol methacrylate, glycidyl methacrylate.

Examples of monofunctional carboxyl-containing methacrylates:
β-carboxyethyl methacrylate, succinic acid monomethacryloyloxyethyl ester, ω-carboxypolycaprolactone monomethacrylate, 2-methacryloyloxyethyl hydrogen phthalate, 2-methacryloyloxypropyl hydrogen phthalate, 2-methacryloyloxypropyl hexahydrohydrogen phthalate, 2- Methacryloyloxypropyl tetrahydrophthalate.

Examples of other monofunctional methacrylates:
Dimethylaminomethyl methacrylate, N, N-dimethylaminoethyl methacrylate, N, N-dimethylaminopropyl methacrylate, morpholinoethyl methacrylate, trimethylsiloxyethyl methacrylate, diphenyl-2-methacryloyloxyethyl phosphate, 2-methacryloyloxyethyl acid phosphate, caprolactone Modified-2-methacryloyloxyethyl acid phosphate and the like.

Examples of bifunctional methacrylates:
1,4-butanediol dimethacrylate, 1,6-hexanediol dimethacrylate, ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, tetraethylene glycol dimethacrylate, polyethylene glycol # 200 dimethacrylate, polyethylene glycol # 300 Dimethacrylate, polyethylene glycol # 400 dimethacrylate, polyethylene glycol # 600 dimethacrylate, dipropylene glycol dimethacrylate, tripropylene glycol dimethacrylate, tetrapropylene glycol dimethacrylate, polypropylene glycol # 400 dimethacrylate, polypropylene glycol # 700 dimethacrylate, neopenty Glycol dimethacrylate, neopentyl glycol PO modified dimethacrylate, hydroxypivalic acid neopentyl glycol ester dimethacrylate, caprolactone adduct dimethacrylate of hydroxypivalic acid neopentyl glycol ester, 1,6-hexanediol bis (2-hydroxy-3- (Methacryloyloxypropyl) ether, 1,9-nonanediol dimethacrylate, pentaerythritol dimethacrylate, pentaerythritol dimethacrylate monostearate, pentaerythritol dimethacrylate monobenzoate, 2,2-bis (4-methacryloxypolyethoxyphenyl) propane Bisphenol A dimethacrylate, EO modified bisphenol A dimethacrylate, PO modified bisphenol A-dimethacrylate, hydrogenated bisphenol A dimethacrylate, EO-modified hydrogenated bisphenol A dimethacrylate, PO-modified hydrogenated bisphenol A dimethacrylate, bisphenol F dimethacrylate, EO-modified bisphenol F dimethacrylate, PO-modified bisphenol F dimethacrylate, EO-modified tetrabromobisphenol A dimethacrylate, tricyclodecane dimethylol dimethacrylate, isocyanuric acid EO-modified dimethacrylate.

Examples of trifunctional methacrylates:
Glycerin PO modified trimethacrylate, trimethylolethane trimethacrylate, trimethylolpropane trimethacrylate, trimethylolpropane EO modified trimethacrylate, trimethylolpropane PO modified trimethacrylate, isocyanuric acid EO modified trimethacrylate, isocyanuric acid EO modified ε-caprolactone modified tri Methacrylate, 1,3,5-trimethacryloyl hexahydro-s-triazine, pentaerythritol trimethacrylate, dipentaerythritol trimethacrylate tripropionate.

Examples of tetrafunctional or higher methacrylates:
Pentaerythritol tetramethacrylate, dipentaerythritol pentamethacrylate monopropionate, dipentaerythritol hexamethacrylate, tetramethylolmethane tetramethacrylate, oligoester tetramethacrylate, tris (methacryloyloxy) phosphate.

Examples of arylates:
Allyl glycidyl ether, diallyl phthalate, triallyl trimellitate, isocyanuric acid triarylate.

Examples of acid amides:
Acrylamide, N-methylolacrylamide, diacetoneacrylamide, N, N-dimethylacrylamide, N, N-diethylacrylamide, N-isopropylacrylamide, acryloylmorpholine, methacrylamide, N-methylolmethacrylamide, diacetone methacrylamide, N, N -Dimethylmethacrylamide, N, N-diethylmethacrylamide, N-isopropylmethacrylamide, methacryloylmorpholine.

Examples of styrenes:
Styrene, p-hydroxystyrene, p-chlorostyrene, p-bromostyrene, p-methylstyrene, p-methoxystyrene, pt-butoxystyrene, pt-butoxycarbonylstyrene, pt-butoxycarbonyloxystyrene 2,4-diphenyl-4-methyl-1-pentene.

Examples of other vinyl compounds:
Vinyl acetate, vinyl monochloroacetate, vinyl benzoate, vinyl pivalate, vinyl butyrate, vinyl laurate, divinyl adipate, vinyl methacrylate, vinyl crotonate, vinyl 2-ethylhexanoate, N-vinylcarbazole, N-vinylpyrrolidone etc.

  Said radically polymerizable compound (B) can be easily obtained as a commercial item of the manufacturer shown below. For example, “Light acrylate”, “Light ester”, “Epoxy ester”, “Urethane acrylate” and “Highly functional oligomer” series manufactured by Kyoeisha Yushi Chemical Co., Ltd., Shin Nakamura Chemical Co., Ltd. "NK Ester" and "NK Oligo" series, "Funkril" series manufactured by Hitachi Chemical Co., Ltd., "Aronix M" series manufactured by Toagosei Co., Ltd., manufactured by Daihachi Chemical Industry Co., Ltd. "Functional monomer" series, "Special acrylic monomer" series manufactured by Osaka Organic Chemical Industry Co., Ltd., "Acryester" and "Diabeam oligomer" series manufactured by Mitsubishi Rayon Co., Ltd., Nippon Kayaku Co., Ltd. "Kayarad" and "Kayamar" series manufactured by KK, "Acrylic acid / methacrylic acid ester monomer" series manufactured by Nippon Shokubai Co., Ltd. "NICHIGO-UV purple light urethane acrylate oligomer" series manufactured by Nippon Synthetic Chemical Industry Co., Ltd. "Carboxylic acid vinyl ester monomer" series manufactured by Shin-Etsu Vinyl Acetate Co., Ltd. "Function" manufactured by Kojin Co., Ltd. Monomer "series and the like.

  Moreover, the cyclic compound shown below is also mentioned as a radically polymerizable compound (B).

Examples of three-membered ring compounds:
Vinylcyclopropanes described in Journal of Polymer Science Polymer Chemistry Edition (J. Polym. Sci. Polym. Chem. Ed.), Vol. 17, p. 3169 (1979), Macromolecular Chemie. Rapid Communication (Makromol. Chem. Rapid Commun.), Vol. 5, p. 63 (1984), 1-phenyl-2-vinylcyclopropanes, Journal of Polymer Science Polymer Chemistry Edition ( J. Polym. Sci. Polym. Chem. Ed., Vol. 23, 1931 (1985) and Journal of Polymer Science Polymer Letter Edition (J. Polym. Sci. Polym. Lett. Ed. ), Vol. 21, page 4331 (1983), 2-phenyl-3-vinyloxiranes, Proceedings of the 50th Annual Meeting of the Chemical Society of Japan, 564 (1985) 2,3-di-vinyl oxiranes described.

Examples of cyclic ketene acetals:
Journal of Polymer Science Polymer Chemistry Edition (J.Polym.Sci.Polym.Chem.Ed.), Volume 20, p. 3021 (1982) and Journal of Polymer Science Polymer Letter Edition (J. Polym. Sci. Polym. Lett. Ed.), Volume 21, page 373 (1983), 2-methylene-1,3-dioxepane, polymer pre-prints (Polym. Preprints), No. 34, 152 (1985), dioxolanes, Journal of Polymer Science, Polymer Letter Edition (J. Polym. Sci. Polym. Lett. Ed.), 20, 361 (1982) ), Macromolecular Chemie, Volume 183, 1913 (1982) and Macromolecular Chemie, Volume 186, 1-Methylene-4-phenyl-1,3-dioxepane described in page 1543 (1985), Macromolecules, Vol. 15, page 1711 (1982) 4,7-dimethyl-2- Methylene-1,3-dioxepane, 5,6-benzo-2-methylene-1,3-diosepan described in Polymer Prepreprints, Vol. 34, 154 (1985).

  Furthermore, the radically polymerizable compound (B) can also include those described in the following literature. For example, edited by Shinzo Yamashita et al., “Cross-linking agent handbook” (1981, Taiseisha), Kiyomi Kato edition, “UV / EB curing handbook (raw material edition)”, (1985, Polymer publication society), Radtech Research Meeting, Kiyoshi Akamatsu, “New Technology for Photosensitive Resins” (1987, CMC), Takeshi Endo, “Refinement of Thermosetting Polymers” (1986, CMC), Takiyama Soichiro, “Polyester Resin Handbook” (1988, Nikkan Kogyo Shimbun), edited by Radtech Study Group, “Application and Market of UV / EB Curing Technology” (2002, CMC).

  The radically polymerizable compound (B) of the present invention may be used alone or in a mixture of two or more at any ratio in order to improve desired properties.

  Further, the polymerizable composition of the present invention may be used by adding a carboxyl group-containing polymer (C) shown below for the purpose of using it for image formation as a so-called alkali development type photoresist material. Since the carboxyl group-containing polymer (C) has solubility in an alkaline aqueous solution, if the film prepared using the photopolymerizable composition of the present invention is partially cured, the so-called negative type is obtained due to the difference in solubility in the alkaline aqueous solution. It is possible to form a resist pattern. Here, the carboxyl group-containing polymer (C) is a copolymer of acrylic acid ester or methacrylic acid ester and acrylic acid, or a copolymer of methacrylic acid ester, methacrylic acid and a vinyl monomer copolymerizable therewith. Is mentioned. These copolymers may be used alone or in combination of two or more.

  Here, as the acrylic ester, methyl acrylate, ethyl acrylate, acrylic acid-n-propyl, isopropyl acrylate, acrylic acid-n-butyl, acrylic acid-t-butyl, acrylic acid-2-ethylhexyl, etc. C1-C18 alkyl esters of acrylic acid, hydroxyl-containing acrylic esters such as hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxybutyl acrylate, etc., nitrogen containing dimethylaminoethyl acrylate, diethylaminoethyl acrylate, etc. Acrylic esters, glycidyl acrylate, tetrahydrofurfuryl acrylate, morpholyl acrylate, isobornyl acrylate, cyclohexyl acrylate, and the like can be mentioned, but are not limited thereto. Not to.

  As the methacrylic acid ester, methyl methacrylate, ethyl methacrylate, methacrylic acid-n-propyl, isopropyl methacrylate, methacrylic acid-n-butyl, methacrylic acid-t-butyl, methacrylic acid- C1-C18 alkyl esters of methacrylic acid such as 2-ethylhexyl, hydroxyl-containing methacrylic esters such as hydroxyethyl methacrylate, hydroxypropyl methacrylate, and hydroxybutyl methacrylate, dimethyl methacrylate Nitrogen-containing methacrylates such as aminoethyl and diethylaminoethyl methacrylate, glycidyl methacrylate, tetrahydrofurfuryl methacrylate, morpholyl methacrylate, isobornyl methacrylate, cyclohexyl methacrylate It can be mentioned other methacrylic acid esters such as Le, but is not limited thereto.

  (Meth) acrylic acid ester, (meth) acrylic acid and vinyl monomers copolymerizable therewith include tetrahydrofurfuryl acrylate, dimethylaminoethyl acrylate, glycidyl acrylate, 2,2,2-trifluoroethyl acrylate, 2, Examples include 2,3,3-tetrafluoropropyl acrylate, tetrahydrfurfuryl methacrylate, dimethylaminoethyl methacrylate, glycidyl methacrylate, 2,2,2-trifluoroethyl methacrylate, acrylamide, and styrene.

  The photopolymerization initiator (A) of the present invention is preferably used in the range of 0.005 to 50 parts by weight and more preferably in the range of 0.01 to 20 parts by weight with respect to 100 parts by weight of the radical polymerizable compound (B). Is preferably used. The carboxyl group-containing polymer (C) is preferably used in the range of 20 to 500 parts by weight, more preferably in the range of 50 to 150 parts by weight, with respect to 100 parts by weight of the radical polymerizable compound (B). .

  The polymerizable composition of the present invention is mixed with a binder such as an organic polymer in order to improve the film formability, and is applied to a polymer film such as glass plate, aluminum plate, other metal plate, polyethylene terephthalate or polyethylene. It is possible to use.

  Examples of binders that can be used by mixing with the polymerizable composition of the present invention include polyacrylates, poly-α-alkyl acrylates, polyamides, polyvinyl acetals, polyformaldehydes, polyurethanes, polycarbonates, polystyrenes, Examples thereof include polymers and copolymers such as polyvinyl esters, and more specifically, polymethacrylate, polymethyl methacrylate, polyethyl methacrylate, polyvinyl carbazole, polyvinyl pyrrolidone, polyvinyl butyral, polyvinyl acetate, novolac resin, phenol resin, Epoxy resins, alkyd resins, etc., supervised by Kiyoshi Akamatsu, "New Technology of Photosensitive Resins" (CMC, 1987) and "10188 Chemical Products", pages 657-767 (Chemical Industry Daily, 198) Year) industry known organic polymer according the like.

  The polymerizable composition of the present invention can be used by adding a solvent as necessary for the purpose of improving the coating suitability including viscosity adjustment. The solvent that can be used by adding to the polymerizable composition of the present invention is not particularly limited, and any solvent can be used as long as it can be uniformly mixed with the polymerizable composition of the present invention. For example, known solvents such as alcohols, ketones, esters, aromatics, hydrocarbons, and halogenated hydrocarbons may be used, but the invention is not limited thereto.

  In addition, the polymerizable composition of the present invention has sufficient sensitivity without using other sensitizers, but for the purpose of further improving the sensitivity and improving the film properties after curing, other sensitizers and other sensitizers may be used. It can be used in combination with a photopolymerization initiator.

  Sensitizers that can be used in combination with the polymerizable composition of the present invention include benzophenones, unsaturated ketones typified by chalcone derivatives and dibenzalacetone, benzyl and camphorquinone 1 , 2-diketone derivatives, 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, etc. Pigment, acridine derivative, azine derivative, thiazine derivative, oxazine derivative, indoline derivative, azulene derivative, azurenium derivative, squarylium derivative, porphyrin derivative, tetraphenylporphyrin derivative Triarylmethane derivatives, tetrabenzoporphyrin derivatives, tetrapyrazinoporphyrazine 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 and the like. Other specific examples include Okawara Shin et al., “Dye Handbook” (1986, Kodansha), Colors and sensitizers described in Okawara Nobu et al., “Functional dye chemistry” (1981, CMC), Ikemori Tadasaburo et al., “Special functional materials” (1986, CMC) Although not limited to these, other dyes and sensitizers that absorb light from the ultraviolet to the near-infrared region are included, and these may be two or more in any ratio as necessary. You can use it. Among the sensitizers, thioxanthone derivatives include 2,4-diethylthioxanthone, 2-chlorothioxanthone, 2,4-dichlorothioxanthone, 2-isopropylthioxanthone, 4-isopropylthioxanthone, 1-chloro-4-propoxythioxanthone. Examples of benzophenones include benzophenone, 4-methylbenzophenone, 2,4,6-trimethylbenzophenone, 4,4′-dimethylbenzophenone, 4,4′-dimethoxybenzophenone, 4,4′-bis. (Diethylamino) benzophenone and the like can be mentioned. Examples of coumarins include coumarin 1, coumarin 338 and coumarin 102. Examples of ketocoumarins include 3,3′-carbonylbis (7-diethylaminocoumarin). ) And the like, but is not limited thereto.

  Other polymerization initiators that can be used in combination with the polymerizable composition of the present invention include Irgacure 651, Irgacure 127, Irgacure 184, Darocur 1173, Irgacure 500, Irgacure 1000, Irgacure 2959, Irgacure 2959, Cure 907, IRGACURE 369, IRGACURE 379, IRGACURE 1700, IRGACURE 149, IRGACURE 1800, IRGACURE 1850, IRGACURE 819, IRGACURE 754, IRGACURE 784, IRGACURE 261, IRGACURE OXE-01 (CGI124 ), CGI242 (Ciba Specialty Chemicals), Adekaoptomer N1414, Adekaoptomer N1717 (Asahi Denka), EsacureKIP series, sacureONE, Esacure1001M (Lamberti), triazine derivatives described in JP-B-59-1281, JP-B-61-9621 and JP-A-60-60104, JP-A-59-1504 and JP-A-61. No. 243807, Japanese Patent Publication No. 43-23684, Japanese Patent Publication No. 44-6413, Japanese Patent Publication No. 47-1604 and US Pat. No. 3,567,453, Japanese Patent Publication No. 2,848,328. Organic azide compounds described in US Pat. No. 2,852,379 and US Pat. No. 2,940,853, Japanese Patent Publication No. 36-22062, Japanese Patent Publication No. 37-13109, Japanese Patent Publication No. 38-18015 and Japanese Patent Publication No. 45. Ortho described in Japanese Patent No.-9610 -Quinonediazides, including iodonium compounds described in JP-B-55-39162, JP-A-59-140203, and "Macromolecules", Vol. 10, page 1307 (1977) Various onium compounds, azo compounds described in JP-A-59-142205, JP-A-1-54440, European Patent No. 109851, European Patent No. 126712, “Journal of Imaging Science ( J.IMAG.SCI.), Volume 30, page 174 (1986), titanocenes described in JP-A No. 61-151197, “COORDINATION CHEMISTRY REVIEW” 84, 85-277 (1988) and JP-A-2-182. Transition metal complexes containing a transition metal such as ruthenium described in JP-A-01, aluminate complexes described in JP-A-3-209477, borate compounds described in JP-A-2-157760, JP-A-55-127550 2,4,5-triarylimidazole dimer, 2,2′-bis (o-chlorophenyl) -4,4 ′, 5,5′-tetraphenyl described in JP-A-60-202437 -1,1'-biimidazole, carbon tetrabromide, organic halogen compounds described in JP-A-59-107344, JP-A-5-213861, JP-A-5-255347, JP-A-5-255421 JP, JP-A-6-157623, JP-A-2000-344812, JP-A-2002-265512, and Japanese Patent Application No. 2004-053009. And sulfonium complexes or oxosulfonium complexes described in Japanese Patent Application No. 2004-263413, JP-A-2001-264530, JP-A-2001-261761, JP-A-2000-80068, JP-A-2001-233842. Oxime ester compounds described in U.S. Pat. No. 3,558,309 (1971), U.S. Pat. No. 4,202,697 (1980), JP-A No. 61-24558, JP-T 2004-534797, and JP-A No. 2004-359639, Examples include bifunctional polymerization initiators described in JP-T-2002-530372, and these polymerization initiators are 0.01 to 40 weights per 100 weight parts of a compound having an ethylenically unsaturated bond capable of radical polymerization. It is preferable to be contained in the range of parts Yes.

  In addition, a polymerization inhibitor can be added to the polymerizable composition of the present invention for the purpose of preventing polymerization during storage.

  Specific examples of the polymerization inhibitor that can be added to the polymerizable composition of the present invention include p-methoxyphenol, hydroquinone, alkyl-substituted hydroquinone, catechol, tert-butylcatechol, phenothiazine, and the like. The agent is preferably added in the range of 0.001 to 5 parts by weight with respect to 100 parts by weight of the radical polymerizable compound (B).

  Moreover, the polymerization composition of this invention can add the polymerization accelerator represented by amine, thiol, disulfide, etc. and a chain transfer catalyst for the purpose of further promoting superposition | polymerization.

  Specific examples of the polymerization accelerator and chain transfer catalyst that can be added to the polymerizable composition of the present invention include, for example, ethyl 4-dimethylaminobenzoate, 4-dimethylaminoacetophenone, N-phenylglycine, N, N-diethyl. Aniline, butylamine, dibutylamine, tributylamine, trimethylamine, triethylamine, triisopropylamine, octyldimethylamine, triethanolamine, cyclohexylamine, dicyclohexylamine, benzyldimethylamine, piperidine, piperazine, morpholine, pyridine, phenyldiethanolamine, acrylic acid Amines such as 2- (dimethylamino) ethyl, thiols described in USP No. 4414312 and JP-A 64-13144, and disulfur described in JP-A-2-291561. Fidos, thiones described in US Pat. No. 3,558,322 and JP-A 64-17048, O-acylthiohydroxamates and N-alkoxypyridine thiones described in JP-A-2-291560.

  Further, the polymerizable composition of the present invention can be used depending on the purpose, such as dyes, organic and inorganic pigments, phosphine, phosphonate, phosphite and other oxygen scavengers and reducing agents, antifoggants, antifading agents, antihalation agents, fluorescent enhancers. Whitening agents, surfactants, colorants, extenders, plasticizers, flame retardants, antioxidants, dye precursors, UV absorbers, foaming agents, antifungal agents, antistatic agents, magnetic substances and other various properties You may mix and use the additive to add, a dilution solvent, etc.

  In the polymerization reaction, the polymerizable composition of the present invention can be polymerized by application of energy such as ultraviolet rays, visible light, near infrared rays, electron beams, etc. to obtain a desired polymer, As the light source, a light source having a dominant wavelength of light emission in a wavelength region of 250 nm to 450 nm is preferable. Examples of light sources having a main wavelength of light emission in the wavelength region of 250 nm to 450 nm include ultrahigh pressure mercury lamps, high pressure mercury lamps, medium pressure mercury lamps, mercury xenon lamps, metal halide lamps, high power metal halide lamps, xenon lamps, and pulsed light emission. Various light sources such as a xenon lamp, a deuterium lamp, a fluorescent lamp, an Nd-YAG triple wave laser, a He-Cd laser, a nitrogen laser, an Xe-Cl excimer laser, an Xe-F excimer laser, and a semiconductor-excited solid laser can be used. In addition, the definition of ultraviolet rays, visible light, near infrared rays, and the like referred to in this specification is based on “Iwanami Riken Dictionary 4th Edition” (1987, Iwanami) edited by Ryogo Kubo et al.

  Therefore, various inks, ink-jet inks, overcoat varnishes, various printing plate materials, photoresists, electrophotography, direct printing plate materials, optical fibers, hologram materials, and other photosensitive materials, microcapsules, etc. It can be applied to various recording media, as well as adhesives, pressure-sensitive adhesives, adhesives, release coating agents, sealants, and various paints.

EXAMPLES Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to only the following Example at all. In addition, unless otherwise indicated, a part shows a weight part in an example. First, the compounds (photopolymerization initiator (A)) used in Examples and Comparative Examples are shown in Table 1, and synthesis examples are shown for the compounds ( 10 ) to (12) which are photopolymerization initiators of the present invention.

Table 1

Reference synthesis example (1)
Photopolymerization initiator Synthesis of the following compound (1)

24.0 g of 2-hydroxythioxanthone, 11.9 g of propionic acid, and 800 ml of dichloromethane were added and stirred at room temperature. Thereafter, 34.2 g of dicyclohexylcarbodiimide and 4.3 g of 4-dimethylaminopyridine were added and stirring was continued for 4 hours. Then, it washed with hydrochloric acid water and extracted with dichloromethane. The organic layer was dried over magnesium sulfate, the desiccant was filtered off, and the residue was purified by silica gel column chromatography using ethyl acetate / hexane = 2/1 as a developing solvent to obtain 34.8 g of compound (1). Obtained.

Synthesis example (10)
Photopolymerization initiator: synthesis of compound (10)
Compound in the same manner as in Reference Synthesis Example (1) except that 2-hydroxythioxanthone in Reference Synthesis Example (1) is replaced with 1-hydroxythioxanthone and propionic acid is replaced with 1,3-bis (3-carboxylpropoxy) propane. (10) was obtained.

Synthesis example (11)
Photopolymerization initiator: synthesis of compound (11)
Compound (11) was obtained in the same manner as in Reference Synthesis Example (1) except that propionic acid in Reference Synthesis Example (1) was replaced with di (2-carboxyl-2,2-dimethylethyl) succinic acid.

Synthesis example (12)
Synthesis of the following compound (a)

  14.5 g of 1,3-dihydroxythioxanthone, 11.9 g of sebacolic acid, and 800 ml of dichloromethane were added and stirred at room temperature. Thereafter, 13.6 g of triethylamine was added and stirring was continued for 24 hours. Then, it washed with hydrochloric acid water and extracted with dichloromethane. The organic layer was dried over magnesium sulfate, and the desiccant was filtered off. The residue was purified by silica gel column chromatography using ethyl acetate / hexane = 2/1 as a developing solvent to obtain 21.7 g of compound (a). Obtained.

Synthesis example (13)
Photopolymerization initiator: synthesis of compound (12)
Compound (12) was obtained in the same manner as in Reference Synthesis Example (1) except that 2-hydroxythioxanthone in Reference Synthesis Example (1) was replaced with Compound (a) and propionic acid was replaced with 3-ethoxypropionic acid.

Table 2 shows the results of elemental analysis (Perkin Elmer 2400II elemental analyzer) of compounds ( 10 ) to (12) which are the photopolymerization initiators of the present invention synthesized in the above synthesis example.

(1) Curability / solvent resistance Examples 10 to 12 and Comparative Examples 1 to 5
3 parts by weight of the compound shown in Table 3 as the photopolymerization initiator (A), 1 part by weight of the combined photopolymerization initiator Irgacure 369 (manufactured by Ciba Specialty Chemicals), and 4- (dimethylamino) benzoic acid as the sensitizer 1 part by weight of 2-ethylhexyl acid, 10 parts by weight of Daptot DT170 (diallyl phthalate resin manufactured by Tohto Kasei Co., Ltd.) and 85 parts by weight of ditrimethylolpropane tetraacrylate as a radical polymerizable compound (B) are coated by heating and melting. A liquid was prepared. This coating solution was applied onto a pet film using a bar coater (# 3). After UV irradiation (high pressure mercury lamp 160W / cm1 light) to this coated material, the curability is judged by a conveyor speed which is rubbed with a cotton cloth and the film is not damaged, and the solvent resistance is measured with a cotton swab containing methyl ethyl ketone. Judgment was made at the conveyor speed at which the film was rubbed without scratching. The results are shown in Table 3. In addition, the larger the number at the conveyor speed (m / min) of the ultraviolet irradiation device, the better the curability.

Table 3

  The polymerizable composition using the photopolymerization initiator of the present invention has higher curability and solvent resistance than a polymerizable composition using a photopolymerization initiator that is generally used. It became clear. In particular, it was revealed that the solvent resistance is very excellent.

(2) Yellowing Examples 22 to 24 and Comparative Examples 6 to 10
3 parts by weight of the compound shown in Table 4 as the photopolymerization initiator (A), 1 part by weight of the combined photopolymerization initiator Irgacure 369 (manufactured by Ciba Specialty Chemicals), and 4- (dimethylamino) benzoic acid as the sensitizer 1 part by weight of 2-ethylhexyl, 10 parts by weight of Daptot DT170 (diallyl phthalate resin manufactured by Toto Kasei Co., Ltd.) and 85 parts by weight of ditrimethylolpropane tetraacrylate as a radical polymerizable compound (B) are blended, heated and melted to be applied. A working solution was prepared. This coating solution was applied onto a pet film using a bar coater (# 3). This coated product is irradiated with ultraviolet rays (high pressure mercury lamp 160 W / cm1 light) at a conveyor speed (10 m / min) at which the coated product is completely cured using a belt conveyor type ultraviolet irradiation device. After complete curing, 10 panelists judged yellowing before and after curing in the coated product. Judgment evaluated in five steps, 1 (bad) to 5 (good). The results are shown in Table 4.

Table 4

  It became clear that the polymerizable composition using the photopolymerization initiator of the present invention is excellent in yellowing as compared with a polymerizable composition using a photopolymerization initiator that is generally used.

(3) Exudation amount Examples 25-36, Comparative Examples 11-15
3 parts by weight of a compound shown in Table 5 as a photopolymerization initiator (A), 1 part by weight of a combined photopolymerization initiator Irgacure 369 (manufactured by Ciba Specialty Chemicals), and 4- (dimethylamino) benzoic acid as a sensitizer 1 part by weight of 2-ethylhexyl, 10 parts by weight of Daptot DT170 (diallyl phthalate resin manufactured by Toto Kasei Co., Ltd.) and 85 parts by weight of ditrimethylolpropane tetraacrylate as a radical polymerizable compound (B) are blended, heated and melted to be applied. A working solution was prepared. This coating solution was applied onto a pet film using a bar coater (# 3). This coated product is irradiated with ultraviolet rays (high pressure mercury lamp 160 W / cm1 light) at a conveyor speed (10 m / min) at which the coated product is completely cured using a belt conveyor type ultraviolet irradiation device. Completely cured, put an uncoated pet film on the coated material, leave it at 60 ° C and 15 g / cm ² for 1 day, and ooze out (transfer) to the uncoated pet film. The amount of photopolymerization initiator was quantified. The results are shown in Table 5.

Table 5

  It has been clarified that the polymerizable composition using the photopolymerization initiator of the present invention has a smaller amount of oozing than a polymerizable composition using a photopolymerization initiator that is generally used.

  Further, from Comparative Examples 11 to 15 of the oozing amount, the photopolymerization initiator having a polymerizable substituent capable of reacting with the monomer or the like in the polymerizable composition in the photopolymerization initiator has a smaller oozing amount. Although it can be seen that there is a tendency, the photopolymerization initiator of the present invention has the most excellent oozing amount even though it does not have a polymerizable substituent capable of reacting with a monomer or the like in the polymerizable composition. Although it is not clear about this reason, since the photopolymerization initiator of the present invention has the highest curability according to the curable examples, the crosslinking density of the polymerizable composition using the photopolymerization initiator of the present invention is high, and curing is performed. It is speculated that the photopolymerization initiator is less likely to ooze out from the later coating film. However, comparing the results of Comparative Example 1 and Comparative Example 2 with Comparative Example 11 and Comparative Example 12, it can be seen that the better the curability, the better the amount of seepage. Therefore, it is also considered that the structure of the photopolymerization initiator of the present invention is difficult to ooze out from the polymerizable composition due to some reason.

  It is clear that the polymerizable composition using the photopolymerization initiator of the present invention is excellent in curability and solvent resistance even when compared with a polymerizable composition using a photopolymerization initiator that is generally used. It became. In addition, the polymerizable composition using the photopolymerization initiator of the present invention can suppress coloring after curing of the polymerizable composition and bleeding of the photopolymerization initiator as compared with a general polymerizable composition. In other words, it has been clarified that all of these requirements that were difficult with a polymerizable composition using a conventional photopolymerization initiator are satisfied.

  The present invention provides a photopolymerization initiator that functions as a radical generator with extremely high sensitivity to irradiation with energy rays, particularly irradiation with light of 250 to 450 nm. Therefore, the photopolymerization initiator of the present invention can rapidly and surely proceed polymerization, crosslinking reaction, etc. using radicals generated by irradiation of energy rays, which have been conventionally used, as a result. It can be expected to increase the sensitivity to energy rays or to improve the characteristics of various applications by sufficiently proceeding the reaction. Examples of applications that can be expected to increase sensitivity and improve properties according to the present invention include molding resins, casting resins, photo-molding resins, sealants, dental polymerization resins, printing inks that utilize polymerization or crosslinking reactions, Ink-jet ink, paint, photosensitive resin for printing plates, color proof for printing, resist for color filters, resist for black matrix, photo spacer for liquid crystal, screen material for rear projection, optical fiber, rib material for plasma display, dry film resist, Resist for printed circuit boards, solder resist, photoresist for semiconductor, resist for microelectronics, resist for micromachine parts manufacturing, etching resist, microlens array, insulating material, hologram material, optical switch, waveguide material, overcoat Agent, powder coatings, adhesives, pressure-sensitive adhesives, release agents, optical recording media, adhesive, release coat agent composition for image recording materials using microcapsules, various devices and the like.

Claims (4)

Photopolymerization initiator represented by the following general formula (2).
General formula (2)

(In formula , R < ⁹ > -R < ¹⁵ > represents a hydrogen atom or following General formula (3) each independently .
A ¹ represents a divalent linking group. )
General formula (3)

(In the formula, R ¹⁶ represents a substituted or unsubstituted alkyl group having 2 or more carbon atoms.) R ⁹ to R ¹⁵ are, the photopolymerization initiator according to claim 1 is a hydrogen atom. A polymerizable composition comprising the photopolymerization initiator (A) according to claim 1 or 2 and a radical polymerizable compound (B). A method for producing a polymer, wherein the polymerizable composition according to claim 3 is polymerized by light irradiation.