JPH08179504A - Photopolymerizable composition - Google Patents

Abstract

PURPOSE: To attain a high sensitivity of a practicable use level with a visible light laser, etc., by incorporating a compd. having unsatd. double bonds and a specific initiator as a photopolymn. initiation system into the above compsn. CONSTITUTION: The photopolymerizable compsn. contains the addition polymerizable compd. having at least one piece of the ethylenic unsatd. double bonds and the photopolymn. initiation system contg. the initiator expressed by the formula. In the formula, Dye denotes a sensitizing dyestuff residue and A denotes -COO- or -SO3 group. The addition polymerizable compd. having at least one piece of the ethylenic unsatd. double bonds refers to a compd. having such ethylenic unsatd. double bonds to be addition polymerized and cured by the effect of the photopolymn. initiation system which is a second essential component when the photopolymerizable compsn. is subjected to irradiation with active rays. Such compd. is, for example, a monomer having double bonds or a polymer having the ethylenic unsatd. double bonds in the side chains or the main chain.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to photopolymerizable compositions. More specifically, it relates to a photopolymerizable composition having extremely high sensitivity to light rays in the visible region.

[0002]

2. Description of the Related Art Conventionally, many image forming methods utilizing a photopolymerization system are known. For example, a photopolymerizable composition comprising a compound containing an addition-polymerizable ethylenic double bond, a photopolymerization initiator, and an organic polymer binder optionally used is prepared, and the photopolymerizable composition is supported. A photosensitive material having a layer of a photopolymerizable composition applied on the body is prepared, and a desired image is imagewise exposed to polymerize and cure the exposed portion, and the unexposed portion is dissolved and removed to form a cured relief image. And a layer of the photopolymerizable composition is provided between two supports in which at least one of the above-mentioned photosensitive materials is transparent, and the transparent support side is imagewise exposed to cause a change in adhesive strength by light. After that, there is a method of forming an image by peeling the support, and an image forming method utilizing the change of toner adhesion of the photopolymerizable composition layer due to light. Conventionally, benzoyl, benzoin alkyl ether, benzyl ketal, benzophenone, anthraquinone, benzyl, or Michler's ketone has been used as the photopolymerization initiator of the photopolymerizable composition applied to these methods.
However, these photopolymerization initiators are compared with the photopolymerization initiation ability for light in the ultraviolet region of 400 nm or less,
It is significantly lower for light in the visible region above 400 nm and thus has limited the range of applications of photopolymerizable compositions containing them.

In recent years, with the development of image forming technology, there has been a strong demand for a photopolymer having a high adaptability to light rays in the visible region. For example, it is a light-sensitive material suitable for non-contact type projection exposure plate making, laser plate making by visible light laser, and the like. Among these techniques, the plate making method using an oscillation beam of visible light of an argon ion laser is considered to be one of the most promising techniques in the future.

Several proposals have hitherto been made for a photopolymerizable composition containing a photopolymerization initiation system which is sensitive to light rays in the visible light region. For example, a system of hexaarylbiimidazole, a radical generator and a dye (Japanese Patent Publication No.
5-37377), a system of hexaarylbiimidazole and (p-dialkylaminobenzylidene) ketone (JP-A-47-2528, JP-A-54-155292).
Each of the above publications), a system of a cyclic cis-α-dicarbonyl compound and a dye (JP-A-48-84183), a system of a substituted triazine and a merocyanine dye (JP-A-54-151024).
No.), a system of ketocoumarin and an activator (JP-A-52-1).
12681, JP 59-15503, JP 60
-88005), a system of substituted triazine and a sensitizer (JP-A-58-29803, JP-A-58-40302).
Each of the above publications), biimidazole, a styrene derivative, a thiol system (JP-A-59-56403), an organic peroxide-dye system (JP-A-59-140203, JP-A-59-140203).
No. 9-189340), titanocene systems (JP-A-59-152396, JP-A-61-151197, JP-A-61-151197,
JP-A-63-10602, JP-A-63-41484
JP-A-2-291, JP-A-3-12403, JP-A-3-20293, JP-A-3-27393, and JP-A-3
No. 52050, and a system in which a titanocene, a xanthene dye, and an addition-polymerizable ethylenic saturated double bond-containing compound having an amino group or a urethane group are combined (JP-A-4-221958 and JP-A-4-219756).
Each of the above publications), a system of titanocene and a 3-ketocoumarin dye (JP-A-63-221110), and the like.

[0005]

However, although these prior arts are effective for visible light, the sensitivity is practically considered from the viewpoint of compatibility with visible light lasers.
Still not enough. Therefore, an object of the present invention is to provide a photopolymerizable composition having a practical level of high sensitivity with a visible light laser or the like. That is, it is to provide a photopolymerizable composition capable of performing a plate making operation at a high speed by using an air-cooled argon laser having a relatively low output or a YAG laser using a semiconductor laser.

[0006]

DISCLOSURE OF THE INVENTION The inventors of the present invention have made extensive studies for the above purpose, and as a result, as a result of the sensitizing dye's specific t-peroxide
The present inventors have found that the sensitivity is dramatically improved by introducing a substituent having a butyl ester skeleton, and have reached the present invention. The present invention provides a photopolymerizable composition containing a compound capable of addition polymerization having at least one ethylenically unsaturated double bond and a photopolymerization initiation system, wherein the photopolymerization initiation system is represented by the following general formula [I] The photopolymerizable composition is characterized by containing an initiator represented by

[0007]

Embedded image

(In the formula, Dye represents a sensitizing dye residue, and A
Represents a —COO— or —SO ₃ — group) Hereinafter, the present invention will be described in detail. The addition-polymerizable compound having at least one ethylenically unsaturated double bond contained as the first essential component in the photopolymerizable composition of the present invention (hereinafter abbreviated as “ethylenic compound”) is
When the photopolymerizable composition is irradiated with actinic rays, addition polymerization is performed by the action of the photopolymerization initiation system which is the second essential component,
A compound having an ethylenically unsaturated double bond that cures, for example, a monomer having the above double bond, or a polymer having an ethylenically unsaturated double bond in the side chain or main chain. is there. Incidentally, the meaning of the monomer in the present invention is a concept facing a so-called polymer substance, and therefore includes not only a narrowly defined monomer but also a dimer, a trimer and an oligomer. is there.

Examples of the monomer having an ethylenically unsaturated bond include unsaturated carboxylic acid, ester of aliphatic polyhydroxy compound and unsaturated carboxylic acid; ester of aromatic polyhydroxy compound and unsaturated carboxylic acid; Examples thereof include esters obtained by an esterification reaction of a saturated carboxylic acid with a polyvalent carboxylic acid and the above-mentioned aliphatic polyhydroxy compound, polyvalent hydroxy compound such as aromatic polyhydroxy compound, and the like.

The ester of the aliphatic polyhydroxy compound and the unsaturated carboxylic acid is not limited, but specific examples thereof include ethylene glycol diacrylate, triethylene glycol diacrylate, trimethylolpropane triacrylate and trimethylolethane triacrylate. Acrylic esters such as pentaerythritol diacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, glycerol acrylate, etc. Methacrylic acid ester replaced, Itaconic acid ester similarly replaced with itaconate Crotonate is maleic acid ester, and was replaced with crotonic acid ester or maleate was replaced.

Examples of the ester of an aromatic polyhydroxy compound and an unsaturated carboxylic acid include hydroquinone diacrylate, hydroquinone dimethacrylate, resorcin diacrylate, resorcin dimethacrylate and pyrogallol triacrylate. The ester obtained by the esterification reaction of an unsaturated carboxylic acid with a polyvalent carboxylic acid or a polyvalent hydroxy compound is not necessarily a single substance, but representative specific examples include acrylic acid, phthalic acid and ethylene glycol. Examples thereof include condensates, condensates of acrylic acid, maleic acid and diethylene glycol, condensates of methacrylic acid, terephthalic acid and pentaerythritol, condensates of acrylic acid, adipic acid, butanediol and glycerin.

Other examples of the ethylenic compound used in the present invention include acrylamides such as ethylenebisacrylamide; allyl esters such as diallyl phthalate;
Vinyl group-containing compounds such as divinyl phthalate are useful. The polymer having an ethylenically unsaturated bond in the main chain described above is, for example, a polyester obtained by a polycondensation reaction of an unsaturated divalent carboxylic acid and a dihydroxy compound,
There are polyamides and the like obtained by polycondensation reaction of unsaturated divalent carboxylic acid and diamine. The polymer having an ethylenically unsaturated bond in the side chain is a condensation polymer of a dicarboxylic acid having an unsaturated bond in the side chain, such as itaconic acid, propylidene succinic acid, ethylidene malonic acid, etc. and a dihydroxy or diamine compound. . Further, a polymer having a functional group having a reactive activity such as a hydroxy group or a methyl halide group in its side chain, for example, polyvinyl alcohol, poly (2-hydroxyethyl methacrylate), polyepichlorohydrin, etc. and acrylic acid, methacrylic acid, crotonic acid, etc. Polymers obtained by the macromolecular reaction with the unsaturated carboxylic acid can also be suitably used.

Of the above-mentioned ethylenic compounds, acrylic acid ester or methacrylic acid ester monomers can be particularly preferably used. Next, the photopolymerization initiation system will be described. The initiator of the present invention is a compound represented by the above general formula [I]. The method for producing the compound is not particularly limited, but it can be obtained, for example, by reacting an anionic sensitizing dye having a carboxylate group or a sulfonate group with p-halomethylperbenzoic acid t-butyl ester. More preferably, it can be obtained by reacting an anionic sensitizing dye having a sodium or potassium carboxylic acid or sulfonic acid base with p-bromomethylperbenzoic acid t-butyl ester. The production method is a particularly advantageous method because the reaction easily proceeds at room temperature.

The anionic sensitizing dye is a xanthene dye having a carboxylate group or a sulfonate group, a rhodamine dye, a pyrromethene dye, a cyanine dye, a coumarin dye, a dialkylstyryl dye, a squarylium dye,
Examples thereof include benzofuryl dye, porphyrin dye, triphenylmethane dye, indigo dye and the like. Of these, xanthene dyes and pyrromethene dyes are preferable. Incidentally, the sensitizing dye residue in the present invention, the aromatic ring or heterocyclic ring of the sensitizing dye as described above, optionally via an alkylene group, via a bonded carboxylic acid group or sulfonic acid group It represents a functional group capable of binding to another skeleton.

In the present invention, one or more initiators represented by the above general formula [I] are selected and used. Typical examples of the compound represented by the general formula [I] are shown below, but the compounds are not limited to these and should be understood as merely examples.

[0016]

Embedded image

[0017]

[Chemical 4]

(In the formulas [II] to [V], S ^{1 to} S ⁴ represent iodine atom or bromine atom, S ^{5 to} S ⁸ represent hydrogen atom,
Represents a chlorine atom or a bromine atom, and Q is

[0019]

Embedded image

N ^{1 to} N ⁴ represent an alkyl group or a cyclic structure, and X ¹ represents a halogen atom or an organic anion ion. )

[0021]

[Chemical 6]

(In the formulas [VI] and [VII], Q is as defined above, T ^{1 to} T ⁴ are hydrogen atoms, halogen atoms, alkyl groups, aryl groups, aralkyl groups, acyl groups, alkoxycarbonyl groups, substituted or Represents an unsubstituted hydrocarbon ring residue or a substituted or unsubstituted heterocyclic residue, T ⁵ represents an alkyl group, an aryl group, an allyl group, an aralkyl group, a substituted or unsubstituted hydrocarbon ring residue or a substituted or unsubstituted It represents a substituted heterocyclic residue, and X ² and X ³ represent a halogen atom, an alkyl group, an aryl group, an aralkyl group, a substituted or unsubstituted hydrocarbon ring residue or a substituted or unsubstituted heterocyclic residue. )

[0023]

[Chemical 7]

(In the formulas [VIII] and [IX], Q and X
¹ is the same as above, m and n represent 0 to 8, Z is an oxygen atom, a sulfur atom,

[0025]

Embedded image

R ^{10 to} R ^{12 each} represent a hydrogen atom, an alkyl group, an aralkyl group, a substituted or unsubstituted hydrocarbon ring residue or a substituted or unsubstituted heterocyclic residue, and the ring residue A is 1 ~ Represents a dinuclear substituted or unsubstituted hydrocarbon ring residue or a substituted or unsubstituted heterocyclic residue. )

[0027]

[Chemical 9]

(In the formulas [X] and [XI], N ¹ , N ² ,
Q is the same as above. )

[0029]

[Chemical 10]

(In the formulas [XII] and [XIII], N ¹ , N
² , A, m and Q are the same as above. )

[0031]

[Chemical 11]

(In the formulas [XIV] and [XV], A, m,
Q and Z are the same as above. )

[0033]

[Chemical 12]

(In the formula [XVI], N ¹ , N ² and Q are the same as above.)

[0035]

[Chemical 13]

(In the formula [XVII], V ^{1 to} V ¹² are hydrogen atoms,
Alkyl group, aralkyl group, acyl group, alkoxycarbonyl group, aryl group

[0037]

Embedded image

## STR3 ## where l is 0 to 10 and Q is as defined above, but at least one of V ^{1 to} V ¹² is

[0039]

[Chemical 15]

And the porphyrin ring has Z at its center.
Metal atoms such as n, Mg, Al, Ni and B may be introduced.

[0041]

Embedded image

(In the formulas [XVIII] and [XIX], Q, N
¹, N², X¹Is the same as above. Of the above representative examples, formulas [II] to [VII] are particularly preferred.
Yes. N in the above formula¹~ N^Four, T¹~ T^Five, X², X³,
V¹~ V¹², R^Ten~ R¹²Carbon when representing an alkyl group
It is preferable that the number is 1 to 10 and the number of carbons is 1 to 6.
It is particularly preferable that T¹~ T^Five, X², X³, V
¹~ V¹², R^Ten~ R¹²Represents an aralkyl group, charcoal
The prime number is preferably 6 to 20, and the carbon number is 6 to 1.
5 is particularly preferable. T¹~ T^Five, X¹,
X², V¹~ V¹²When, and represent an aryl group,
It is preferably 6 to 20 and has 6 to 15 carbon atoms.
Is particularly preferable. T¹~ T^Five, X¹, X², V¹
~ V¹²Represents an acyl group or an alkyloxycarbonyl group
In this case, the number of carbon chains is preferably 1-10,
It is particularly preferable that the number of carbon chains is 1 to 5. T¹~ T
^Five, X¹, X², V¹~ V¹², R ^Ten~ R¹²Is a hydrocarbon ring
When representing a residue, the hydrocarbon ring is mono- or di-nuclear
It is preferable that the substituent has an alkyl group having 1 to 3 carbon atoms.
It is particularly preferable that it is a phenyl group. Also included in the heterocyclic group
Examples of the hetero atom include nitrogen atom, oxygen atom,
Alternatively, it is preferably a sulfur atom. Also, T¹But
When it represents an allyl group, it preferably has 2 to 10 carbon atoms.
New

Specific examples of the peroxidized t-butyl ester having the sensitizing dye of the present invention represented by the general formula [I] will be given below, but the present invention is not limited to these specific examples. In the following specific examples, Q is

[0044]

[Chemical 17]

Represents

[0046]

Embedded image

[0047]

[Chemical 19]

[0048]

Embedded image

[0049]

[Chemical 21]

[0050]

[Chemical formula 22]

Among the above specific examples, [A-1] to [A-
8] is particularly preferable. The amount of the photopolymerization initiation system used is not particularly limited, but is 0.5 to 20 parts by weight, more preferably 0.5 to 100 parts by weight of the ethylenic compound.
10 to 10 parts by weight. In the photopolymerizable composition of the present invention, for the purpose of improving sensitivity or improving storage stability, if necessary, JP-A-4-221958, JP-A-59-56403,
The ethylenic compound 1 is used as the activator or amine compound capable of generating a radical described in JP-A No. 58-29803.
0.1 to 30 parts by weight, preferably 0.00
It can be added in a proportion of 5 to 20 parts by weight.

Particularly preferred additives include dialkylamine, Michler's ketone, p-diethylaminobenzoic acid ethyl ester and the like. Further, the photopolymerizable composition of the present invention may be used in combination with an initiator other than the formula [I],
Examples thereof include a titanocene compound, hexaarylbiimidazole, a halogenated hydrocarbon derivative, an organic thiol compound, a diaryliodonium salt, and an organic peroxide.

Of these, a titanocene compound is particularly preferable. The titanocene compound is not particularly limited, but is disclosed in, for example, JP-A-59-152396 and JP-A-6-162.
It can be appropriately selected and used from various titanocene compounds described in JP-A No. 1-151197. More specifically, di-cyclopentadienyl-Ti-di-
Chloride, di-cyclopentadienyl-Ti-bis-
Phenyl, di-cyclopentadienyl-Ti-bis-
2,3,4,5,6-Pentafluorophen-1--1-
Il, di-cyclopentadienyl-Ti-bis-2,
3,5,6-Tetrafluorophenyl-1-yl, di-cyclopentadienyl-Ti-2,4,6-trifluorophen-1-yl, di-cyclopentadienyl-Ti-
Bis-2,6-di-fluorophen-1-yl, di-cyclopentadienyl-Ti-bis-2,4-di-fluorophen-1-yl, di-methylcyclopentadienyl-Ti-bis -2,3,4,5,6-pentafluorophen-1-yl, di-methylcyclopentadienyl-T
i-bis-2,3,5,6-tetrafluorophenyl-1
-Yl, di-methylcyclopentadienyl-Ti-bis-2,6-difluorophen-1-yl, di-cyclopentadienyl-Ti-bis-2,6-difluoro-3-
(Pyr-1-yl) -phen-1-yl and the like can be mentioned.

In the photopolymerizable composition of the present invention, in addition to the above-mentioned core constituents, it is preferable to further add an organic polymer substance as a binder in order to modify the composition and improve the physical properties after photocuring. . The binder may be appropriately selected depending on the improvement purpose such as compatibility, film forming property, developability, and adhesiveness. Specifically, for example, to improve the water-based developability, acrylic acid copolymer, methacrylic acid copolymer, itaconic acid copolymer, partially esterified maleic acid copolymer, acidic cellulose modified product having a carboxyl group in the side chain, Examples include polyethylene oxide and polyvinylpyrrolidone.

To improve the film strength and adhesion, a polyether of epichlorohydrin and bisphenol A; soluble nylon; polyalkyl methacrylate or polyalkyl acrylate such as polymethyl methacrylate; alkyl methacrylate and acrylonitrile, acrylic acid , Copolymers with methacrylic acid, vinyl chloride, vinylidene chloride, styrene, etc .; copolymers of acrylonitrile with vinyl chloride, vinylidene chloride; vinylidene chloride, chlorinated polyolefins, copolymers of vinyl chloride with vinyl acetate; poly Vinyl acetate; Acrylonitrile-styrene copolymer; Acrylonitrile-butadiene-styrene copolymer; Polyvinyl alkyl ether; Polyvinyl alkyl ketone; Polystyrene; Polyamide; Polyurethane; Polyethylene terephthalate Phthalate; acetyl cellulose and polyvinyl butyral, and the like. The weight ratio of these binders to the ethylenic compound is preferably 500% or less, more preferably 200% or less.
It can be added and mixed in the range of not more than%.

The photopolymerizable composition of the present invention may further contain a thermal polymerization inhibitor, a coloring agent, a plasticizer, a surface protective agent, a smoothing agent, if necessary.
Coating aids and other additives can be added. Examples of the thermal polymerization inhibitor include hydroquinone, p-methoxyphenol, pyrogallol, catechol, 2,6-di-
There are t-butyl-p-cresol and β-naphthol, and examples of the colorant include phthalocyanine pigments, azo pigments, carbon black, pigments such as titanium oxide, ethyl violet, crystal violet, azo dyes, and anthraquinone pigments. There are dyes and cyanine dyes. When the binder is used, the thermal polymerization inhibitor and the colorant are added in an amount of 0.01 to 3% of the thermal polymerization inhibitor and 0.1 of the colorant with respect to the total weight of the ethylenic compound and the binder. ~ 2
0% is preferable.

Examples of the plasticizer include dioctyl phthalate, didodecyl phthalate, triethylene glycol dicaprylate, dimethyl glycol phthalate, tricresyl phosphate, dioctyl adipate, dibutyl sebacate, and triacetyl glycerin. When used, 10% or less of the total weight of the ethylenic compound and the binder can be added.

When using the photopolymerizable composition of the present invention,
The light-sensitive material can be prepared by forming the light-sensitive material without a solvent or dissolving it in a suitable solvent to form a solution, which is applied on a support and dried. Examples of the solvent include methyl ethyl ketone, cyclohexanone, butyl acetate, amyl acetate, ethyl propionate, toluene, xylene, monochlorobenzene, carbon tetrachloride, trichloroethylene,
There are trichloroethane, dimethylformamide, methyl cellosolve, ethyl cellosolve, tetrahydrofuran, bentoxone, propylene glycol monomethyl ether and the like, and one kind or a combination of two or more kinds can be used.

The support applied when preparing a light-sensitive material using the photopolymerizable composition of the present invention may be any of those usually used. For example, a sheet of metal such as aluminum, magnesium, copper, zinc, chromium, nickel, iron or an alloy containing them as a main component; high-quality paper, art paper,
Papers such as release paper; inorganic sheets such as glass and ceramics; polyethylene terephthalate, polyethylene, polymethylmethacrylate, polyvinyl chloride, vinyl chloride-
Polymer sheets such as vinylidene chloride copolymer, polystyrene, 6-nylon, cellulose triacetate, and cellulose acetate butyrate are available.

Further, the photopolymerizable composition of the present invention is further provided with a known technique for preventing adverse effects such as sensitivity decrease and storage stability deterioration due to oxygen, for example, providing a peelable transparent cover sheet on the photosensitive layer. Wax-like substance with low oxygen permeability,
It is also possible to provide a coating layer made of a water-soluble polymer or the like.
The exposure light source that can be applied to the composition of the present invention is not particularly limited, but includes carbon arc, high pressure mercury lamp, xenon lamp, metal halide lamp, fluorescent lamp, tungsten lamp, helium cadmium laser, argon ion laser, etc. visible light of 400 nm or more. A general-purpose light source can be used more suitably.

[0061]

The present invention will be described in more detail below with reference to examples and comparative examples, but the present invention is not limited to these examples unless it exceeds the gist. Synthesis Example 1 (Synthesis Example of A-1) 10 mmol of erythrosine, 10 mmol of p-bromomethylperbenzoic acid t-butyl ester, and 20 g of dimethyl sulfoxide were placed in a 100 ml flask, and the mixture was allowed to stand at room temperature for 2 hours.
After stirring for 4 hours, 20 g of water was added to the reaction solution, and the precipitated solid content was filtered and extracted.

Examples 1 to 11 and Comparative Examples 1 to 5 On a grained and anodized aluminum sheet, a photosensitive composition coating solution having the following composition was applied to a dry film thickness of 2 μm using a whirler. Then, a polyvinyl alcohol aqueous solution was applied on the surface so that the dry film thickness was 3 μm to prepare a photosensitive material sample.

Then, a xenon lamp: UI-501C manufactured by Ushio Inc. was used for this photosensitive material sample, and a spectral sensitivity measuring device manufactured by Narumi Co., Ltd. was used to decrease the light intensity logarithmically on the horizontal axis and logarithmically on the vertical axis. 10 rays of the wavelengths shown in Table-1
Irradiated for seconds. The exposed photosensitive material sample was developed with an aqueous solution containing 2% by weight of butyl cellosolve and 1% by weight of sodium silicate, and the minimum exposure amount required for forming a photocured image was calculated from the height of the obtained cured image. The sensitivity of the photosensitive composition was used. The results are shown in Table-1.

[0064]

[Table 1] Photosensitive composition coating liquid Methyl methacrylate / methacrylic acid copolymer 50 parts by weight (weight average molecular weight 45,000, copolymerization ratio 85/15) trimethylolpropane triacrylate 50 parts by weight methyl cellosolve 800 parts by weight Tetrahydrofuran 50 parts by weight Polymerization initiator (listed in Table-1) 2 parts by weight Additive (listed in Table-1) Listed in Table-1

[0065]

[Table 2]

[0066]

[Table 3] [Additives] are the same as described above. B-1: N-vinylpyrrolidone B-2: N-methylpyrrolidone

[Sensitizing dye] means the following.

[0068]

[Chemical formula 23]

[0069]

[Chemical formula 24]

From the results shown in Table 1, it is apparent that the sensitivity is remarkably increased by using an initiator having a substituent having a specific peroxidized t-butyl ester skeleton introduced into the sensitizing dye.

[0071]

The photopolymerizable composition of the present invention is
In particular, it is extremely sensitive to long-wavelength light. Therefore,
The composition is useful in a wide range of application fields, for example, printing plates such as planographic printing, intaglio printing, letterpress printing, photoresists for printed wiring and IC fabrication, dry film, image formation such as relief image and image duplication, It is industrially very useful because it can be used for photocurable inks, paints, adhesives and the like.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location H01L 21/027

Claims (1)

[Claims] 1. A photopolymerization composition containing an addition-polymerizable compound having at least one ethylenically unsaturated double bond and a photopolymerization initiation system, wherein the photopolymerization initiation system is represented by the following general formula [I]. A photopolymerizable composition comprising the indicated initiator. Embedded image (In the formula, Dye represents a sensitizing dye residue, and A represents -COO-.
Or represents a —SO ₃ — group)