JP2007119686A - Photopolymerizable composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a photopolymerizable composition having high sensitivity, generating active radicals in high efficiency by the application of energy rays, especially light, improving the compatibility with solvents, monomers, etc., and quickly polymerizing a radically curable substance. <P>SOLUTION: The photopolymerization initiator is expressed by general formula (1) (R1 to R5 are each H or a univalent organic residue; and at least one of R1 to R5 is a (substituted)alkoxyl group or a (substituted)aryloxy group). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a photopolymerizable composition using a photopolymerization initiator and a sensitizer. In more detail, active radicals are efficiently generated by irradiation of energy rays, particularly light, and radical curable compounds are polymerized in a short time. For example, molding resins, casting resins, stereolithography resins, sealants, dental Polymerization resin, printing ink, paint, photosensitive resin for printing plate, color proof for printing, resist for color filter, resist for printed circuit board, photoresist for semiconductor, resist for microelectronics, hologram material, overcoat material, adhesive The present invention relates to a photopolymerization initiator for obtaining a cured product having good physical properties in the fields of adhesives, release agents, optical recording media, various devices and the like, and a photopolymerizable composition using the same.

Conventionally, it is known that certain O, O′-diacylglyoximes function as photoradical polymerization initiators (see Non-Patent Documents 1 to 3). Furthermore, it is also known that certain oxime esters having a structure similar to O, O′-diacylglyoxime function as photoradical polymerization initiators (see Patent Documents 1 and 2). Further, α-ketoxime esters have been disclosed as photo radical polymerization initiators for positive or negative photosensitive polyimide precursor compositions (see Patent Document 3). Some benzophenone oxime ester compounds have been disclosed (see Patent Documents 4 and 5). In addition, certain α, α-diketooxime ester compounds are disclosed (see Patent Documents 6 to 10).
In addition, certain O-acyloxime ester compounds have been disclosed (see Patent Documents 11 and 12). Also, certain O-sulfonyl oxime ester compounds and O-phosphoryl oxime ester compounds are disclosed (see Patent Document 13). Furthermore, a photopolymerizable composition comprising an O-acyloxime ester compound and a carbazole derivative is disclosed (Patent Document 14). Moreover, these polymerization initiators can improve the sensitivity by using a general-purpose sensitizer typified by 2,4-diethylthioxanthone, 4,4′-diethylaminobenzophenone, or the like. Any of these can function as a polymerization initiator, but in recent years, there has been a universal demand for higher sensitivity of the polymerization initiator in order to improve productivity and various newly proposed processes.
On the other hand, a photopolymerization composition using either a triazine derivative or an oxadiazole derivative as a photopolymerization initiator and a carbazole derivative as a light absorber is disclosed (see Patent Document 15). An example in which a trihalomethyl-S-triazine derivative and a carbazole derivative are used as a photopolymerization initiator is disclosed (see Patent Document 16). It is also disclosed that a carbazole derivative can be used as a photopolymerization initiator (see Patent Documents 17 and 18).

Journal of Polymer Science, Polymer Chemistry Edition, 1972, 10 (11), 3405-19 Journal of Polymer Science, Polymer Chemistry Edition, 1974, 12 (11), 2553-66 Sumyu Konghakhoe Chi, 1972, 9 (2), 97-110 US Pat. No. 3,558,309 U.S. Pat. No. 4,255,513 JP-A-7-140,658 U.S. Pat. No. 4,590,145 JP 61-24,558 A US Pat. No. 5,019,482 JP-A-62-184,056 JP-A-62-273,259 JP 62-286,961 A JP-A-62-201,859 JP 2001-233,842 A JP 2000-80,068 Special table 2002-538,241 gazette JP-A-2005-187,678 JP-A-62-212,643 JP-A-11-109,615 Japanese Patent Laid-Open No. 10-148,937 JP-A-11-109,623

  The object of the present invention is to generate an active radical efficiently by irradiation of energy rays, particularly light, improve compatibility with a solvent or a monomer, etc., and highly sensitive light capable of polymerizing a radical curable substance in a short time. It is to propose a polymerizable composition. For example, industrially provide practical oligomers and polymers in the fields of inks, paints, photosensitive printing plates, proof materials, photoresists, hologram materials, sealants, overcoat materials, stereolithography resins, adhesives, etc. The object of the present invention is to provide a photopolymerization initiator and a photopolymerizable composition using the photopolymerization initiator for obtaining a cured product having good characteristics.

As a result of intensive studies to solve the above problems, the present inventors have arrived at the present invention. That is, the present invention relates to a photopolymerizable composition comprising a compound represented by the following general formula (1) and a photopolymerizable compound.
General formula (1)

(In the formula, R1 to R5 each independently represents a hydrogen atom or a monovalent organic residue, and at least one of R1 to R5 is an alkoxy group which may have a substituent, or a substituent. In addition, R1 to R5 may be a cyclic structure bonded together, and R6 represents a monovalent organic residue, wherein R7. Represents an alkyl group which may have a substituent having 3 or more carbon atoms.

  The photopolymerization initiator comprising the compound represented by the general formula (1) of the present invention efficiently generates active radicals upon irradiation with energy rays, particularly light. Therefore, it was possible to provide a combination of compounds having a remarkably good effect as a photopolymerization initiator for the polymerizable substance.

  First, the photopolymerization initiator of the present invention will be described. The photopolymerization initiator of the present invention comprises an oxime derivative represented by the general formula (1). In the general formula (1), the substituents R1 to R5 each independently represent a hydrogen atom or a monovalent organic residue, and at least one of the substituents R1 to R5 may be an alkoxy having a substituent. Or an aryloxy group which may have a substituent. Further, the substituents R1 to R5 may have a cyclic structure in which they are bonded together. In the formula, the substituent R6 represents a monovalent organic residue. In the present invention, the monovalent organic residue includes an alkyl group which may have a substituent, an aryl group which may have a substituent, an alkenyl group which may have a substituent, and a substituent. An alkynyl group which may have a substituent, an alkoxy group which may have a substituent, an aryloxy group which may have a substituent, an acyloxy group which may have a substituent, an alkyl which may have a substituent Sulfanyl group, arylsulfanyl group which may have a substituent, alkylsulfinyl group which may have a substituent, arylsulfinyl group which may have a substituent, alkylsulfonyl group which may have a substituent An arylsulfonyl group which may have a substituent, an acyl group which may have a substituent, an alkoxycarbonyl group which may have a substituent, a carbamoyl group which may have a substituent, a substituent Have There sulfamoyl group, an amino group which may have a substituent, a substituent having optionally phosphinoyl group, substituent a heterocyclic group which may have, a halogen group. In the formula, the substituent R7 represents an alkyl group which may have a substituent having 3 or more carbon atoms.

  As the alkyl group which may have a substituent, an alkyl group having 1 to 30 carbon atoms is preferable, for example, methyl group, ethyl group, propyl group, butyl group, hexyl group, octyl group, decyl group, dodecyl group, Okudadecyl group, isopropyl group, isobutyl group, sec-butyl group, tert-butyl group, 1-ethylpentyl group, cyclopentyl group, cyclohexyl group, trifluoromethyl group, 2-ethylhexyl group, phenacyl group, 1-naphthoylmethyl group 2-naphthoylmethyl group, 4-methylsulfanylphenacyl group, 4-phenylsulfanylphenacyl group, 4-dimethylaminophenacyl group, 4-cyanophenacyl group 4-methylphenacyl group, 2-methylphenacyl group, 3-fluorophenacyl group, 3-trifluoromethylphenacyl group, 3-nitrophena Examples include a syl group.

  As the aryl group which may have a substituent, an aryl group having 6 to 30 carbon atoms is preferable, and a phenyl group, a biphenyl group, a 1-naphthyl group, a 2-naphthyl group, a 9-anthryl group, a 9-phenanthryl group, 1-pyrenyl group, 5-naphthacenyl group, 1-indenyl group, 2-azurenyl group, 9-fluorenyl group, terphenyl group, quarterphenyl group, o-, m-, and p-tolyl group, xylyl group, o- , M-, and p-cumenyl group, mesityl group, pentarenyl group, binaphthalenyl group, turnaphthalenyl group, quarternaphthalenyl group, heptaenyl group, biphenylenyl group, indacenyl group, fluoranthenyl group, acenaphthylenyl group, aceanthrylenyl group, Phenalenyl group, fluorenyl group, anthryl group, bianthracenyl group, teranthra Nyl group, quarter anthracenyl group, anthraquinolyl group, phenanthryl group, triphenylenyl group, pyrenyl group, chrysenyl group, naphthacenyl group, preadenyl group, picenyl group, perylenyl group, pentaphenyl group, pentacenyl group, tetraphenylenyl group, Examples include a hexaphenyl group, a hexacenyl group, a ruvicenyl group, a coronenyl group, a trinaphthylenyl group, a heptaphenyl group, a heptacenyl group, a pyranthrenyl group, and an oberenyl group.

  As an alkenyl group which may have a substituent, a C2-C10 alkenyl group is preferable, for example, a vinyl group, an allyl group, a styryl group etc. are mentioned.

  The alkynyl group which may have a substituent is preferably an alkynyl group having 2 to 10 carbon atoms, and examples thereof include an ethynyl group, a propynyl group, and a propargyl group.

  The alkoxy group which may have a substituent is preferably an alkoxy group having 1 to 30 carbon atoms, for example, methoxy group, ethoxy group, propyloxy group, isopropyloxy group, butoxy group, isobutoxy group, sec-butoxy group. Tert-butoxy group, pentyloxy group, isopentyloxy group, hexyloxy group, heptyloxy group, octyloxy group, 2-ethylhexyloxy group, decyloxy group, dodecyloxy group, octadecyloxy group, ethoxycarbonylmethyl group, 2 -Ethylhexyloxycarbonylmethyloxy group, aminocarbonylmethyloxy group, N, N-dibutylaminocarbonylmethyloxy group, N-methylaminocarbonylmethyloxy group, N-ethylaminocarbonylmethyloxy group, N-octylaminocarbonylmethyl A ruoxy group, an N-methyl-N-benzylaminocarbonylmethyloxy group, a benzyloxy group, a cyanomethyloxy group, and the like.

  The aryloxy group which may have a substituent is preferably an aryloxy group having 6 to 30 carbon atoms, such as a phenyloxy group, a 1-naphthyloxy group, a 2-naphthyloxy group, a 2-chlorophenyloxy group, 2-methylphenyloxy group, 2-methoxyphenyloxy group, 2-butoxyphenyloxy group, 3-chlorophenyloxy group, 3-trifluoromethylphenyloxy group, 3-cyanophenyloxy group, 3-nitrophenyloxy group, Examples include 4-fluorophenyloxy group, 4-cyanophenyloxy group, 4-methoxyphenyloxy group, 4-dimethylaminophenyloxy group, 4-methylsulfanylphenyloxy group, 4-phenylsulfanylphenyloxy group and the like.

  The acyloxy group which may have a substituent is preferably an acyloxy group having 2 to 20 carbon atoms, such as an acetyloxy group, a propanoyloxy group, a butanoyloxy group, a pentanoyloxy group, or trifluoromethylcarbonyloxy. Group, benzoyloxy group, 1-naphthylcarbonyloxy group, 2-naphthylcarbonyloxy group and the like.

  The alkylsulfanyl group which may have a substituent is preferably an alkylsulfanyl group having 1 to 20 carbon atoms. For example, a methylsulfanyl group, an ethylsulfanyl group, a propylsulfanyl group, an isopropylsulfanyl group, a butylsulfanyl group, or a hexylsulfanyl group. Group, cyclohexylsulfanyl group, octylsulfanyl group, 2-ethylhexylsulfanyl group, decanoylsulfanyl group, dodecanoylsulfanyl group, octadecanoylsulfanyl group, cyanomethylsulfanyl group, methoxymethylsulfanyl group and the like.

  The arylsulfanyl group which may have a substituent is preferably an arylsulfanyl group having 6 to 30 carbon atoms, such as a phenylsulfanyl group, 1-naphthylsulfanyl group, 2-naphthylsulfanyl group, 2-chlorophenylsulfanyl group, 2-methylphenylsulfanyl group, 2-methoxyphenylsulfanyl group, 2-butoxyphenylsulfanyl group, 3-chlorophenylsulfanyl group, 3-trifluoromethylphenylsulfanyl group, 3-cyanophenylsulfanyl group, 3-nitrophenylsulfanyl group, 4-fluorophenylsulfanyl group, 4-cyanophenylsulfanyl group, 4-methoxyphenylsulfanyl group, 4-methylsulfanylphenylsulfanyl group, 4-phenylsulfanylphenylsulfuric group Aniru group, 4-dimethylamino-phenylsulfanyl group and the like.

  The alkylsulfinyl group which may have a substituent is preferably an alkylsulfinyl group having 1 to 20 carbon atoms. For example, a methylsulfinyl group, an ethylsulfinyl group, a propylsulfinyl group, an isopropylsulfinyl group, a butylsulfinyl group, and a hexylsulfinyl group. Group, cyclohexylsulfinyl group, octylsulfinyl group, 2-ethylhexylsulfinyl group, decanoylsulfinyl group, dodecanoylsulfinyl group, octadecanoylsulfinyl group, cyanomethylsulfinyl group, methoxymethylsulfinyl group and the like.

  The arylsulfinyl group which may have a substituent is preferably an arylsulfinyl group having 6 to 30 carbon atoms, such as a phenylsulfinyl group, 1-naphthylsulfinyl group, 2-naphthylsulfinyl group, 2-chlorophenylsulfinyl group, 2-methylphenylsulfinyl group, 2-methoxyphenylsulfinyl group, 2-butoxyphenylsulfinyl group, 3-chlorophenylsulfinyl group, 3-trifluoromethylphenylsulfinyl group, 3-cyanophenylsulfinyl group, 3-nitrophenylsulfinyl group, 4-fluorophenylsulfinyl group, 4-cyanophenylsulfinyl group, 4-methoxyphenylsulfinyl group, 4-methylsulfanylphenylsulfinyl group, 4-phenylsulfanylphenylsulfuric group Iniru group, 4-dimethylaminophenyl sulfinyl group and the like.

  The alkylsulfonyl group which may have a substituent is preferably an alkylsulfonyl group having 1 to 20 carbon atoms. For example, a methylsulfonyl group, an ethylsulfonyl group, a propylsulfonyl group, an isopropylsulfonyl group, a butylsulfonyl group, a hexylsulfonyl group. Group, cyclohexylsulfonyl group, octylsulfonyl group, 2-ethylhexylsulfonyl group, decanoylsulfonyl group, dodecanoylsulfonyl group, octadecanoylsulfonyl group, cyanomethylsulfonyl group, methoxymethylsulfonyl group and the like.

  The arylsulfonyl group which may have a substituent is preferably an arylsulfonyl group having 6 to 30 carbon atoms, such as a phenylsulfonyl group, a 1-naphthylsulfonyl group, a 2-naphthylsulfonyl group, a 2-chlorophenylsulfonyl group, 2-methylphenylsulfonyl group, 2-methoxyphenylsulfonyl group, 2-butoxyphenylsulfonyl group, 3-chlorophenylsulfonyl group, 3-trifluoromethylphenylsulfonyl group, 3-cyanophenylsulfonyl group, 3-nitrophenylsulfonyl group, 4-fluorophenylsulfonyl group, 4-cyanophenylsulfonyl group, 4-methoxyphenylsulfonyl group, 4-methylsulfanylphenylsulfonyl group, 4-phenylsulfanylphenylsulfonyl group, 4-dimethylaminopheny Sulfonyl group, and the like.

  The acyl group which may have a substituent is preferably an acyl group having 2 to 20 carbon atoms, for example, acetyl group, propanoyl group, butanoyl group, trifluoromethylcarbonyl group, pentanoyl group, benzoyl group, 1-naphthoyl. Group, 2-naphthoyl group, 4-methylsulfanylbenzoyl group, 4-phenylsulfanylbenzoyl group, 4-dimethylaminobenzoyl group, 4-diethylaminobenzoyl group, 2-chlorobenzoyl group, 2-methylbenzoyl group, 2-methoxybenzoyl Group, 2-butoxybenzoyl group, 3-chlorobenzoyl group, 3-trifluoromethylbenzoyl group, 3-cyanobenzoyl group, 3-nitrobenzoyl group, 4-fluorobenzoyl group, 4-cyanobenzoyl group, 4-methoxybenzoyl Groups and the like.

  The alkoxycarbonyl group which may have a substituent is preferably an alkoxycarbonyl group having 2 to 20 carbon atoms, such as a methoxycarbonyl group, ethoxycarbonyl group, propoxycarbonyl group, butoxycarbonyl group, hexyloxycarbonyl group, octyl. Oxycarbonyl group, decyloxycarbonyl group, octadecyloxycarbonyl group, phenoxycarbonyl group, trifluoromethyloxycarbonyl group, 1-naphthyloxycarbonyl group, 2-naphthyloxycarbonyl group, 4-methylsulfanylphenyloxycarbonyl group, 4- Phenylsulfanylphenyloxycarbonyl group, 4-dimethylaminophenyloxycarbonyl group, 4-diethylaminophenyloxycarbonyl group, 2-chlorophenyloxycarbonyl group Group, 2-methylphenyloxycarbonyl group, 2-methoxyphenyloxycarbonyl group, 2-butoxyphenyloxycarbonyl group, 3-chlorophenyloxycarbonyl group, 3-trifluoromethylphenyloxycarbonyl group, 3-cyanophenyloxycarbonyl group , 3-nitrophenyloxycarbonyl group, 4-fluorophenyloxycarbonyl group, 4-cyanophenyloxycarbonyl group, 4-methoxyphenyloxycarbonyl group and the like.

  The carbamoyl group which may have a substituent is preferably a carbamoyl group having 1 to 30 carbon atoms, for example, an N-methylcarbamoyl group, an N-ethylcarbamoyl group, an N-propylcarbamoyl group, or an N-butylcarbamoyl group. N-hexylcarbamoyl group, N-cyclohexylcarbamoyl group, N-octylcarbamoyl group, N-decylcarbamoyl group, N-octadecylcarbamoyl group, N-phenylcarbamoyl group, N-2-methylphenylcarbamoyl group, N-2- Chlorophenylcarbamoyl group, N-2-isopropoxyphenylcarbamoyl group, N-2- (2-ethylhexyl) phenylcarbamoyl group, N-3-chlorophenylcarbamoyl group, N-3-nitrophenylcarbamoyl group, N-3-cyanophenyl A carbamoyl group, -4-methoxyphenylcarbamoyl group, N-4-cyanophenylcarbamoyl group, N-4-methylsulfanylphenylcarbamoyl group, N-4-phenylsulfanylphenylcarbamoyl group, N-methyl-N-phenylcarbamoyl group, N, N -Dimethylcarbamoyl group, N, N-dibutylcarbamoyl group, N, N-diphenylcarbamoyl group and the like.

  The sulfamoyl group which may have a substituent is preferably a sulfamoyl group having 0 to 30 carbon atoms, for example, a sulfamoyl group, an N-alkylsulfamoyl group, an N-arylsulfamoyl group, N, N- Examples thereof include a dialkylsulfamoyl group, an N, N-diarylsulfamoyl group, and an N-alkyl-N-arylsulfamoyl group. More specifically, N-methylsulfamoyl group, N-ethylsulfamoyl group, N-propylsulfamoyl group, N-butylsulfamoyl group, N-hexylsulfamoyl group, N-cyclohexylsulfur group. Famoyl group, N-octylsulfamoyl group, N-2-ethylhexylsulfamoyl group, N-decylsulfamoyl group, N-octadecylsulfamoyl group, N-phenylsulfamoyl group, N-2- Methylphenylsulfamoyl group, N-2-chlorophenylsulfamoyl group, N-2-methoxyphenylsulfamoyl group, N-2-isopropoxyphenylsulfamoyl group, N-3-chlorophenylsulfamoyl group, N-3-nitrophenylsulfamoyl group, N-3-cyanophenylsulfamoyl group, N-4-methoxyphenyl Nylsulfamoyl group, N-4-cyanophenylsulfamoyl group, N-4-dimethylaminophenylsulfamoyl group, N-4-methylsulfanylphenylsulfamoyl group, N-4-phenylsulfanylphenylsulfamoyl Group, N-methyl-N-phenylsulfamoyl group, N, N-dimethylsulfamoyl group, N, N-dibutylsulfamoyl group, N, N-diphenylsulfamoyl group and the like.

The amino group which may have a substituent is preferably an amino group having 0 to 50 carbon atoms in total, for example, —NH ₂ , N-alkylamino group, N-arylamino group, N-acylamino group, N— Examples include sulfonylamino group, N, N-dialkylamino group, N, N-diarylamino group, N-alkyl-N-arylamino group, N, N-disulfonylamino group, and the like. More specifically, N-methylamino group, N-ethylamino group, N-propylamino group, N-isopropylamino group, N-butylamino group, N-tert-butylamino group, N-hexylamino group, N-cyclohexylamino group, N-octylamino group, N-2-ethylhexylamino group, N-decylamino group, N-octadecylamino group, N-benzylamino group, N-phenylamino group, N-2-methylphenylamino Group, N-2-chlorophenylamino group, N-2-methoxyphenylamino group, N-2-isopropoxyphenylamino group, N-2- (2-ethylhexyl) phenylamino group, N-3-chlorophenylamino group, N-3-nitrophenylamino group, N-3-cyanophenylamino group, N-3-trifluoromethylphenylamino group, -4-methoxyphenylamino group, N-4-cyanophenylamino group, N-4-trifluoromethylphenylamino group, N-4-methylsulfanylphenylamino group, N-4-phenylsulfanylphenylamino group, N- 4-dimethylaminophenylamino group, N-methyl-N-phenylamino group, N, N-dimethylamino group, N, N-diethylamino group, N, N-dibutylamino group, N, N-diphenylamino group, N N-diacetylamino group, N, N-dibenzoylamino group, N, N- (dibutylcarbonyl) amino group, N, N- (dimethylsulfonyl) amino group, N, N- (diethylsulfonyl) amino group, N N- (dibutylsulfonyl) amino group, N, N- (diphenylsulfonyl) amino group and the like.

  The phosphinoyl group which may have a substituent is preferably a phosphinoyl group having 2 to 50 carbon atoms, for example, dimethylphosphinoyl group, diethylphosphinoyl group, dipropylphosphinoyl group, diphenylphosphinoyl group. Group, dimethoxyphosphinoyl group, diethoxyphosphinoyl group, dibenzoylphosphinoyl group, bis (2,4,6-trimethylphenyl) phosphinoyl group and the like.

  The heterocyclic group that may have a substituent is preferably an aromatic or aliphatic heterocyclic ring containing a nitrogen atom, an oxygen atom, a sulfur atom, or a phosphorus atom. For example, thienyl group, benzo [b] thienyl group, naphtho [2,3-b] thienyl group, thiantenyl group, furyl group, pyranyl group, isobenzofuranyl group, chromenyl group, xanthenyl group, phenoxathinyl 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, indolyl group, 1H-indazolyl group, purinyl group, 4H- Quinolidinyl group, isoquinolyl group, quinolyl group, phthalazinyl group, naphthyridinyl group, quinoxanilyl group, quinazolinyl group, cinnolinyl group, pteridinyl group, 4aH-carbazolyl group, carbazolyl group, β-carbolinyl group, phenanthridinyl group, acridinyl group Group, phenanthrolinyl group, phenazinyl group, phenalsadinyl group, isothiazolyl group, phenothiazinyl group, isoxazolyl group, furazanyl group, phenoxazinyl group, isochromanyl group, chromanyl group, pyrrolidinyl group, pyrrolinyl group, imidazolidinyl group, imidazolinyl group, pyrazolidinyl group Group, pyrazolinyl group, piperidyl group, piperazinyl group, indolinyl group, isoindolinyl group, quinuclidinyl group, morpholinyl group, thioxanthryl group and the like.

Examples of the halogen group that may have a substituent include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.

  Furthermore, the alkyl group which may have a substituent mentioned above, the aryl group which may have a substituent, the alkenyl group which may have a substituent, the alkynyl group which may have a substituent, a substituent An alkoxy group which may have a substituent, an aryloxy group which may have a substituent, an acyloxy group which may have a substituent, an alkylsulfanyl group which may have a substituent, and a substituent An arylsulfanyl group which may have a substituent, an alkylsulfinyl group which may have a substituent, an arylsulfinyl group which may have a substituent, an alkylsulfonyl group which may have a substituent, and a substituent. An arylsulfonyl group, an optionally substituted acyl group, an optionally substituted alkoxycarbonyl group, an optionally substituted carbamoyl group, an optionally substituted sulfamoyl group, Amino group which may have a group, hydrogen atom of the heterocyclic group which may have a substituent may be further substituted with other substituents.

  Examples of such substituents include halogen groups such as fluorine atom, chlorine atom, bromine atom and iodine atom, alkoxy groups such as methoxy group, ethoxy group and tert-butoxy group, aryl groups such as phenoxy group and p-tolyloxy group. Oxy group, methoxycarbonyl group, butoxycarbonyl group, alkoxycarbonyl group such as phenoxycarbonyl group, acetoxy group, propionyloxy group, acyloxy group such as benzoyloxy group, acetyl group, benzoyl group, isobutyryl group, acryloyl group, methacryloyl group, An acyl group such as a methoxalyl group, an alkylsulfanyl group such as a methylsulfanyl group or a tert-butylsulfanyl group, an arylsulfanyl group such as a phenylsulfanyl group or a p-tolylsulfanyl group, an alkylsulfuryl group such as a methylamino group or a cyclohexylamino group; Killamino, dimethylamino, diethylamino, morpholino, piperidino and other dialkylamino groups, phenylamino, p-tolylamino and other arylamino groups, methyl, ethyl, tert-butyl, dodecyl, etc. In addition to aryl groups such as alkyl groups, phenyl groups, p-tolyl groups, xylyl groups, cumenyl groups, naphthyl groups, anthryl groups, phenanthryl groups, etc., hydroxy groups, carboxy groups, formyl groups, mercapto groups, sulfo groups, mesyl groups , P-toluenesulfonyl group, amino group, nitro group, cyano group, trifluoromethyl group, trichloromethyl group, trimethylsilyl group, phosphinico group, phosphono group, trimethylammoniumumyl group, dimethylsulfoniumumyl group, triphenylphenacylphospho And niumyl group.

  Furthermore, some of the substituents R1 to R5 may be linked by a covalent bond.

  In these substituents R1 to R6, preferably an alkyl group which may have a substituent, an aryl group which may have a substituent, an alkoxy group which may have a substituent, and a substituent. Examples include a good aryloxy group, an acyl group which may have a substituent, a heterocyclic group which may have a substituent, and the like, but the present invention is not limited to these examples.

  At least one of the substituents R1 to R5 is an alkoxy group which may have a substituent or an aryloxy group which may have a substituent. Preferably, R2, R3 and R4 are substituents. Or an aryloxy group that may have a substituent, and more preferably, R2 and R3 have an alkoxy group that may have a substituent or a substituent. It may be an aryloxy group.

  In the substituent R7, the alkyl group which may preferably have a substituent having 3 or more carbon atoms is preferably an alkyl group having 3 to 30 carbon atoms, such as a propyl group, a butyl group, a hexyl group, an octyl group, Decyl group, dodecyl group, okdadecyl group, isopropyl group, isobutyl group, sec-butyl group, tert-butyl group, 1-ethylpentyl group, cyclopentyl group, cyclohexyl group, trifluoromethyl group, 2-ethylhexyl group, phenacyl group, 1-naphthoylmethyl group, 2-naphthoylmethyl group, 4-methylsulfanylphenacyl group, 4-phenylsulfanylphenacyl group, 4-dimethylaminophenacyl group, 4-cyanophenacyl group 4-methylphenacyl group, 2 -Methylphenacyl group, 3-fluorophenacyl group, 3-trifluoromethylphena Examples thereof include a syl group and a 3-nitrophenacyl group.

  An alkyl group which may have a substituent having 4 to 26 carbon atoms is preferable, and an alkyl group which may have a substituent having 6 to 20 carbon atoms is more preferable. It is not limited to these examples.

  Specific examples of the photopolymerization initiator of the present invention described above include the following compounds (where Me is a methyl group, Et is an ethyl group, Bu is a butyl group, Hex is a hexyl group, Tol represents a paratolyl group, Ac represents an acetyl group, and Bz represents a benzoyl group).

Specific examples of compounds that can be represented by the general formula (1) are shown in Table 1.

  All oxime groups exist in two configurations, (Z) or (E). The isomers can be separated by conventional methods, but mixtures of isomers can also be used as photoinitiating species. Therefore, the compound of the general formula (1) of the present invention includes a component of a mixture of configurational isomers.

In addition, the photopolymerizable compound in the photopolymerizable composition of the present invention is a compound having a photopolymerizable ethylenically unsaturated bond, and the compound having a photopolymerizable ethylenically unsaturated bond is in the molecule. Any compound having at least one ethylenically unsaturated bond capable of radical polymerization can be used, and has a chemical form such as a monomer, an oligomer or a polymer. These may be used alone or may be a system in which two or more kinds are mixed at an arbitrary ratio in order to improve the intended characteristics.

  Examples of such compounds having a photopolymerizable ethylenically unsaturated bond include unsaturated carboxylic acids such as acrylic acid, methacrylic acid, itaconic acid, crotonic acid, isocrotonic acid, maleic acid, and their salts, esters, Examples of the polymerizable compound include urethane, amide and anhydride, acrylonitrile, styrene, various unsaturated polyesters, unsaturated polyethers, unsaturated polyamides, and unsaturated polyurethanes, but the present invention is limited thereto. It is not a thing.

  Specifically, 2-ethylhexyl acrylate, 2-hydroxyethyl acrylate, butoxyethyl acrylate, carbitol acrylate, cyclohexyl acrylate, tetrahydrofurfuryl acrylate, benzyl acrylate, bis (4-acryloxypolyethoxyphenyl) butane, neo Pentyl glycol diacrylate, 1,6-hexanediol diacrylate, ethylene glycol diacrylate, diethylene glycol diacrylate, triethylene glycol diacrylate, tetraethylene glycol diacrylate, polyethylene glycol diacrylate, polypropylene glycol diacrylate, pentaerythritol diacrylate , Pentaerythritol triacrylate, pentaerythritol Acrylic acid derivatives such as tetraacrylate, dipentaerythritol tetraacrylate, trimethylolpropane triacrylate, tetramethylolmethane tetraacrylate, oligoester acrylate, N-methylolacrylamide, diacetoneacrylamide, epoxy acrylate, methyl methacrylate, N-butyl methacrylate, 2-hexyl methacrylate, benzyl methacrylate, dimethylaminomethyl methacrylate, 1,6-hexanediol dimethacrylate, ethylene glycol dimethacrylate, triethylene glycol dimethacrylate, polyethylene glycol dimethacrylate, polypropylene glycol dimethacrylate, trimethylolethane trimethacrylate , Trimethylol group Methacrylic acid derivatives such as pantrimethacrylate, 2,2-bis (4-methacryloxypolyethoxyphenyl) propane, and other derivatives of allyl compounds such as allyl glycidyl ether, diallyl phthalate, triallyl trimellitate, etc. More specifically, edited by Shinzo Yamashita et al., “Cross-linking agent handbook” (1981, Taiseisha), Kiyoto Kato, “UV / EB curing handbook (raw material)”, (1985, Polymer publication society) ), Radtech Study Group, “Application and Market of UV / EB Curing Technology”, 79, (1989, CMC), Akamatsu Kiyoshi, “New Technology for Photosensitive Resins”, (1987, C MC), Shinichiro Takiyama, “Polyester Resin Handbook” (1988, Nikkan Kogyo Shimbun) or commercial products known in the industry Examples include radically polymerizable or crosslinkable monomers, oligomers, and polymers.

  The photopolymerization initiator represented by the general formula (1) of the present invention is preferably 0.01 to 30 parts by weight, more preferably 100 parts by weight of the compound having a photopolymerizable ethylenically unsaturated bond. 0.1 to 10 parts by weight.

  The photopolymerizable composition of the present invention can be used by mixing with a binder such as an organic polymer and applying it to a polymer film such as a glass plate, an aluminum plate, other metal plates, or polyethylene terephthalate.

  Examples of binders that can be used by mixing with the photopolymerizable composition of the present invention include polyacrylates, poly-α-alkyl acrylates, polyamides, polyvinyl acetals, polyformaldehydes, polyurethanes, polycarbonates, and polystyrenes. And polymers such as polyvinyl esters and copolymers, and more specifically, polymethacrylate, polymethyl methacrylate, polyethyl methacrylate, polyvinyl carbazole, polyvinyl pyrrolidone, polyvinyl butyral, polyvinyl acetate, novolac resin, phenol resin. , Epoxy resin, Alkyd resin, etc., supervised by Kiyoshi Akamatsu, “New photosensitive resin actual technology” (1987, CMC) and “10188 chemical products”, 657-767 (1988, Chemical Industries) Hosha) industry known organic polymer according the like.

  Furthermore, the photopolymerizable composition of the present invention may be used by adding the following carboxyl group-containing polymer for the purpose of using it as a photoresist material for image formation. Since the carboxyl group-containing polymer has solubility in an alkaline aqueous solution, if the film prepared using the photopolymerizable composition of the present invention is partially cured, a so-called negative resist pattern is formed due to the difference in solubility in the alkaline aqueous solution. Can be formed. Here, the carboxyl group-containing polymer includes 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. . These copolymers may be used alone or in combination of two or more.

  Here, as the methacrylic acid ester, methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, isobornyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, 2-ethylhexyl methacrylate, isobornyl methacrylate, etc. Is mentioned.

  Methacrylic acid ester, methacrylic acid and vinyl monomers copolymerizable therewith include tetrahydrofurfuryl acrylate, dimethylaminoethyl acrylate, glycidyl acrylate, 2,2,2-trifluoroethyl acrylate, 2,2,3, Examples include 3-tetrafluoropropyl acrylate, tetrahydrfurfuryl methacrylate, dimethylaminoethyl methacrylate, glycidyl methacrylate, 2,2,2-trifluoroethyl methacrylate, acrylamide, and styrene.

  The photopolymerizable composition of the present invention can be used in combination with other polymerization initiators for the purpose of further improving sensitivity.

Other polymerization initiators that can be used in combination with the photopolymerizable composition of the present invention include triazines described in JP-B-59-1281, JP-B-61-9621, and JP-A-60-60104. Derivatives, organic peroxides described in JP-A-59-1504 and JP-A-61-243807, JP-B-43-23684, JP-B-44-6413, JP-B-47-1604 and US Pat. No. 3,567,453, diazonium compound publications, USP 2,848,328, USP 2,852,379 and USP 2,940,853, organic azide compounds, Japanese Patent Publication No. 36-22062, Japanese Patent Publication No. 37- No. 13109, Japanese Patent Publication No. 38-18015 and Japanese Patent Publication No. 45-9610 Ortho-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. 1099851, European Patent No. 126712, “Journal of Imaging Science” (J.IMAG.SCI.), Vol. 30, page 174 (1986), titanocenes described in JP-A No. 61-151197, “COORDINATION CHEMISTRY REVIEW 84], 85-277 (1988) and JP-A-2 Transition metal complexes containing a transition metal such as ruthenium described in Japanese Patent No. 182701, an aluminate complex described in Japanese Patent Application Laid-Open No. 3-209477, a borate compound described in Japanese Patent Application Laid-Open No. 2-157760, and Japanese Patent Application Laid-Open No. 55-127550 And 2,4,5-triarylimidazole dimer described in JP-A-60-202437, carbon tetrabromide and organic halogen compounds described in JP-A-59-107344, JP-A-5-255347. Sulfonium complex or oxosulfonium complex described in JP-A No. 2001-264530, JP-A No. 2001-261661, JP-A No. 2000-80068, JP-A No. 2001-233842, US Pat. No. 3,558,309 (1971). ), USP4202697 (1980) and Examples thereof include oxime ester compounds described in JP-A No. 61-24558, and these polymerization initiators are 0.01 to 10 parts by weight with respect to 100 parts by weight of a compound having an ethylenically unsaturated bond capable of radical polymerization. It is preferable to contain in the range.

  In addition, by combining with a sensitizer that absorbs ultraviolet to near-infrared light to increase the activity for light from the ultraviolet to the near-infrared region, it is an extremely sensitive photopolymerizable composition. Is possible.

  Specific examples of such sensitizers include unsaturated ketones typified by chalcone derivatives and dibenzalacetone, 1,2-diketone derivatives typified by benzyl and camphorquinone, benzoin derivatives, and 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, tetrabenzopo Filin derivatives, tetrapyrazinoporphyrazine derivatives, phthalocyanine derivatives, tetraazaporphyrazine derivatives, tetraquinoxalyloporphyrazine derivatives, naphthalocyanine derivatives, subphthalocyanine derivatives, pyrylium derivatives, thiopyrylium derivatives, tetraphyrin derivatives, annulene derivatives, spiropyran derivatives , Spirooxazine derivatives, thiospiropyran derivatives, metal arene complexes, organoruthenium complexes, etc. Other specific examples include Okawara Nobu et al., “Dye Handbook” (1986, Kodansha), Okawara Nobu et al. The dyes and sensitizers described in “Chemistry of Sexual Dyes” (1981, CMC), edited by Tadasaburo Ikemori, “Special Functional Materials” (1986, CMC), are not limited thereto. Without Other dyes and a sensitizer exhibiting absorbs light of over the near infrared region can be mentioned the ultraviolet, may be used two or more in an arbitrary ratio, if these are required. Among the sensitizers described above, a thioxanthone derivative may be mentioned as a sensitizer that can particularly preferably sensitize the photopolymerization initiator of the present invention. More specific examples include 2,4-diethylthioxanthone, 2-chlorothioxanthone, 2,4-dichlorothioxanthone, 2-isopropylthioxanthone, 4-isopropylthioxanthone, 1-chloro-4-propoxythioxanthone, and the like. However, it is not limited to these.

  The photopolymerizable composition of the present invention can be added with a thermal polymerization inhibitor for the purpose of preventing polymerization during storage.

  Specific examples of the thermal polymerization inhibitor that can be added to the photopolymerizable composition of the present invention include p-methoxyphenol, hydroquinone, alkyl-substituted hydroquinone, catechol, tert-butylcatechol, phenothiazine, and the like. The thermal polymerization inhibitor is preferably added in the range of 0.001 to 5 parts by weight with respect to 100 parts by weight of the compound having a polymerizable ethylenically unsaturated bond.

In addition, the photopolymerizable composition of the present invention can be further added with a polymerization accelerator represented by amine, thiol, disulfide, or the like for the purpose of further promoting polymerization.

Specific examples of the polymerization accelerator and chain transfer catalyst that can be added to the photopolymerizable composition of the present invention include, for example, amines such as N-phenylglycine, triethanolamine, N, N-diethylaniline, USP No. 4414312. And thiols described in JP-A-64-13144, disulfides described in JP-A-2-291561, thiones described in USP 3558322 and JP-A-64-17048, Examples thereof include O-acylthiohydroxamate and N-alkoxypyridinethiones described in Kaihei 2-291560.

  The photopolymerizable composition of the present invention further comprises dyes, organic and inorganic pigments, phosphine, phosphonate, phosphite and other oxygen scavengers and reducing agents, antifoggants, antifading agents, antihalation agents, fluorescent materials. Brighteners, surfactants, colorants, extenders, plasticizers, flame retardants, antioxidants, UV absorbers, foaming agents, antifungal agents, antistatic agents, magnetic substances and other additives that add various properties You may mix and use an agent, a dilution solvent, etc.

  In the polymerization reaction, the photopolymerizable composition of the present invention can be polymerized by application of energy such as ultraviolet rays, visible rays, near infrared rays, electron beams, etc. to obtain a desired polymer. The definitions of ultraviolet rays, near-ultraviolet rays, visible light, near-infrared rays, infrared rays, and the like referred to in this specification are based on “Iwanami Rikagaku Dictionary 4th Edition” (1987, Iwanami) edited by Ryogo Kubo et al.

Therefore, the photopolymerizable composition of the present invention includes a low pressure mercury lamp, a medium pressure mercury lamp, a high pressure mercury lamp, an ultrahigh pressure mercury lamp, a xenon lamp, a carbon arc lamp, a metal halide lamp, a fluorescent lamp, a tungsten lamp, an argon ion laser, a helium cadmium laser, By applying energy from various light sources such as helium neon laser, krypton ion laser, various semiconductor lasers, YAG laser, light emitting diode, CRT light source, plasma light source, electron beam, gamma ray, ArF excimer laser, KrF excimer laser, F2 laser A polymer or cured product can be obtained.

Therefore, various inks, various printing plate materials, photoresists, electrophotography, direct printing plate materials, photosensitive materials such as hologram materials and various recording media such as microcapsules, and adhesives, which are coated on a substrate together with a binder and the like, It can be applied to pressure-sensitive adhesives, adhesives, sealants and various paints.
(Function)
The photopolymerizable composition comprising the compound represented by the general formula (1) and the photopolymerizable compound of the present invention generates free radicals efficiently by being excited and decomposed by irradiation with energy rays, particularly light. It is thought to do. At the same time, crystallinity and solubility in organic solvents can be improved, thereby obtaining good stability.

EXAMPLES Hereinafter, although a synthesis example, an Example, and a comparative example are shown and this invention is demonstrated in detail, this invention is not limited only to the following.
Synthesis example 1
Synthesis of Compound (1) 1- (4-Methoxyphenyl) -1,2-hexanedione 2-oxime (13.2 mmol) and sodium acetate (44.1 mmol) were stirred in 80 ml of tetrahydrofuran, and acetic anhydride (80.5 mmol) was added and heated to reflux for 10 hours. Thereafter, the reaction solution was poured into 500 g of ice water, and the crude product was extracted with ethyl acetate, dried over anhydrous magnesium sulfate, and concentrated to obtain Compound (1) as a colorless oil (yield 88%).

Synthesis Examples 2-24
Compounds (2) to (24) shown in Table 1 were produced from the corresponding oxime according to the method described in Synthesis Example 1 using the corresponding acid anhydride or acid chloride.

Examples 1-2
6 parts by weight of the compound (1), 100 parts by weight of pentaerythritol triacrylate which is a compound having an ethylenically unsaturated bond capable of radical polymerization, 100 parts by weight of polymethyl methacrylate as a binder, and 1600 parts by weight of cyclohexanone as a solvent Parts, a photopolymerizable composition comprising 3 parts by weight of the compound (25) and the compound (26) shown in Table 2 were blended to prepare a coating solution. This coating solution was applied onto a stainless steel plate using a spin coater and dried in an oven at 40 ° C. for 10 minutes. The film thickness after removing the solvent by drying was about 1.5 μm. A polyvinyl alcohol aqueous solution was applied on the photopolymerizable composition layer and dried in an oven at 40 ° C. for 10 minutes. The film thickness of the polyvinyl alcohol layer after drying was about 5 μm. Irradiation of light (5.0 mW / cm ² ) of a high pressure mercury lamp through a band pass filter that selectively transmits light of 350 to 380 nm to this coated material, IR of the photopolymerizable composition layer The spectrum (reflection) was measured, and the intensity at 810 cm ⁻¹ , which is the characteristic absorption of the acrylic group, was monitored.
Table 4 shows the results of calculation based on the IR measurement results with respect to the ratio of acrylic groups consumed by polymerization at the time 60 seconds after the start of light irradiation, based on the pre-light irradiation.

Comparative Examples 1-2
Table 4 shows the results of calculating the acrylic group consumption rate in the same manner as in Examples 1 and 2, except that the compound (27) shown in Table 3 was used instead of the compound represented by the general formula (2). It was shown to.

Example 3
Table 6 shows the results of calculating the consumption rate of the acrylic group in the same manner as in Example 1 except that the compound (12) was used instead of the compound (1) and the compound (25) was not used. .

Comparative Example 3
Table 6 shows the results of calculating the acrylic group consumption rate in the same manner as in Example 3 except that the compound (28) shown in Table 5 was used instead of the compound (12).

Example 4 and Comparative Example 4
Table 8 shows the solubility (wt%) of compound (1) and compound (29) shown in Table 7 in cyclohexanone, propylene glycol monomethyl acetate (PGMEA), isoamyl acetate (IAAc), and pentaerythritol triacrylate.

From the result of the solubility test, the compound (1) shows higher solubility than the compound (29). In general formula (1), it is considered that R7 is an alkyl group which may have a substituent having 3 or more carbon atoms.
Since compound (1) is an oily substance at room temperature, a uniform photopolymerizable composition can be obtained easily and in a short time when mixed with a solvent, a monomer or the like. Compound (29) is also oily, but has very low solubility in a solvent or monomer.

  From the above Examples and Comparative Examples, it was found that the oxime compound represented by the general formula (1) acts as a highly sensitive photopolymerization initiator. It can also be seen that the storage stability over time is very good.

Claims (3)

A photopolymerization initiator represented by the following general formula (1).
General formula (1)

(However, in the formula, R1 to R5 each independently represent a hydrogen atom or a monovalent organic residue, and at least one of R1 to R5 is an alkoxy group which may have a substituent or a substituted group. In addition, R1 to R5 may be a cyclic structure bonded together, and R6 represents a monovalent organic residue. R7 represents an alkyl group which may have a substituent having 3 or more carbon atoms.) 2. A photopolymerizable composition comprising the photopolymerization initiator according to claim 1 and a photopolymerizable compound. 2. A photopolymerizable composition comprising the photopolymerization initiator according to claim 1, a photopolymerizable compound, and a sensitizer.