JP2849438B2 - Photoconductor - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photoreceptor that forms a polymerized image by light, and more particularly to a photosensitive material for producing the photoreceptor, which has a large contrast. The present invention relates to a photoreceptor capable of forming

[Conventional technology]

Various compounds polymerized by light are known, but they have sensitivity to a relatively short wavelength even in near ultraviolet light or visible light, and a relatively large amount of exposure energy (energy) is required. Was.

In order to solve these problems, a polymerization image forming method using silver halide has been proposed.

For example, JP-A-61-69062 discloses that a latent image is formed on a silver halide by exposure, followed by heating to cause an oxidation-reduction reaction using the latent image as a catalyst to generate radicals generated from a reducing agent. This is a method for causing a polymerization reaction.

On the other hand, JP-A-62-70836 discloses a method in which a thermal polymerization initiator is used in combination to increase the polymerization rate.

In this method, a latent image is formed by silver nuclei generated from silver halide by image exposure, and by utilizing the catalytic action of the silver nuclei, an oxidizing agent having a polymerization inhibiting ability different from that of the reducing agent is obtained by heating the reducing agent under heating. The conversion into the isomer causes a difference in the polymerization inhibiting ability between the reducing agent and the generated oxidized form, and also causes a thermal polymerization reaction using a thermal polymerization initiator, resulting in a difference in the polymerization inhibiting ability formed. This is a method of forming a polymerization latent image according to the above.

However, this method has the disadvantage that it is difficult to obtain a good contrast in the polymer image.Japanese Patent Application Laid-Open No. 61-75342 further discloses that a reducing agent having a polymerization inhibiting ability is used in an image forming process during the development of silver halide. Consumed in the (image-exposed area) to form an oxidized form, the remaining reducing agent inhibits the polymerization reaction in an image-like (image-unexposed area), and then uniformly injects light energy from the outside (overall exposure). A method of forming a polymer image by causing photopolymerization at a site (image exposed portion) where a reducing agent is consumed is disclosed.

In these methods, the contrast as a polymerized image (the difference in physical properties between the polymerized portion and the unpolymerized portion) is small, and the polymerized image is converted into a dye image using the polymerized image (for example, a dye is added in advance to form a polymerized image). After that, the dye is diffused and transferred to form a dye image on the image receiving paper), or when the polymerized image is used as a printing plate and printing is performed, there are problems such as color cast and poor printing durability. I was

[Problems to be solved by the invention]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a photoreceptor capable of overcoming the above-mentioned problems and obtaining a dye image with less color cast, and a photoreceptor capable of providing a material having excellent printing durability.

[Means for solving the problem]

The image forming method of the present invention that can solve the above-mentioned problems is a heat-developable photosensitive composition comprising at least photosensitive silver halide, an organic silver salt, and a reducing agent, and a photoreceptor containing a polymerizable polymer precursor. A photoreceptor, wherein the polymerizable polymer precursor contains a compound represented by the following general formula (I).

(Wherein, R ¹ , R ² , R ³ , R ⁴ , R ⁵ and R ⁶ are each independently a hydrogen atom or an alkyl group, and a ₁ , a ₂ , a ₃ , a ₄ , a ₅ And a ₆
Each independently represents a divalent group. ] In the above formula (I), the alkyl group represented by R ¹ to R ⁶ or a ₁ ~a _6,, preferably a methyl group, a ₁ ~
Examples of the divalent group represented by a _6, for example, represented by -r-X, X is -O- or -NH-, r is an alkylene group of methylene, ethylene, propylene and the like.

The present invention can provide a polymerized image having a high crosslinking density by containing the above compound alone as a polymerizable polymer precursor or in combination with a conventional polymerizable polymer precursor, and provides a good color image and printing plate. Can be obtained.

Hereinafter, specific compounds of the general formula (I) will be exemplified, but the present invention is not limited thereto.

The photoreceptor of the present invention contains at least a photosensitive silver halide, an organic silver salt, and a reducing agent in addition to the polymerizable polymer precursor.

Examples of the photosensitive silver halide include silver chloride, silver bromide, silver chlorobromide, silver iodobromide, and silver chloroiodobromide.
These may have been subjected to chemical sensitization and optical sensitization as performed for ordinary photographic emulsions. That is, sulfur sensitization, noble metal sensitization, reduction sensitization and the like can be used as chemical sensitization, and a conventionally well-known method using a sensitizing dye can be used as optical sensitization. Moreover, the halogen composition in the grains may have a uniform or different multiplex structure. Halogen composition, particle size,
Two or more kinds of silver halides having different grain size distributions may be used in combination.

As an organic silver salt, "Basics of photographic optics" (1st edition, 19
Non-silver salt edition, p247, and organic acid silver and triazole silver salts described in JP-A-59-55429 and the like can be used, and it is preferable to use a silver salt with low photosensitivity. .
For example, silver salts such as aliphatic carboxylic acids, aromatic carboxylic acids, thiocarbonyl group compounds having a mercapto group or α-hydrogen, and imino group-containing compounds.

As the aliphatic carboxylic acids, acetic acid, butyric acid, succinic acid,
There are sebacic acid, adipic acid, oleic acid, linoleic acid, linolenic acid, tartaric acid, palmitic acid, stearic acid, behenic acid, camphoric acid, and the like. Those having an appropriate number of carbon atoms (for example, those having a carbon number in the range of 16 to 26) are preferable.

Examples of aromatic carboxylic acids include benzoic acid derivatives, quinolinic acid derivatives, naphthalene carboxylic acid derivatives, salicylic acid derivatives, gallic acid, tannic acid, phthalic acid, phenylacetic acid derivatives, and pyromellitic acid.

Examples of the thiocarbonyl group compound having a mercapto group or an α-hydrogen include 3-mercapto-4-phenyl-1,2,
4-triazole, 2-mercaptobenzimidazole, 2-mercapto-5-aminothiadiazole, 2-
Mercaptobenzothiazole, S-alkylthioglycolic acid (alkyl group having 12 to 22 carbon atoms), dithiocarboxylic acids such as dithioacetic acid, thioamides such as thiostearoamide, 5-carboxy-1-methyl-2-phenyl-4-
Mercapto compounds described in U.S. Pat. No. 4,123,274, such as thiopyridine, mercaptotriazine, 2-mercaptobenzoxazole, mercaptooxadiazole or 3-amino-5-benzylthio-1,2,4-triazole.

As a compound containing an imino group, Japanese Patent Publication No. 44-3027
No. 0 or No. 45-18416 benzotriazole or a derivative thereof, for example, benzotriazole, alkyl-substituted benzotriazoles such as methylbenzotriazole, 5-chlorobenzotriazole, halogen-substituted benzotriazoles, carboxyimide benzotriazole and the like. Imidobenzotriazoles, JP
Nitrobenzotriazoles described in 58-118639, sulfobenzotriazole, carboxybenzotriazole or salts thereof described in JP-A-58-115638, and hydroxybenzotriazole such as 1,2,4-triazole described in U.S. Pat. And 1H-tetrazole, carbazole, saccharin, imidazole and derivatives thereof.

As the polymerizable polymer precursor used in combination with the compound of the general formula (I), a compound having at least one reactive vinyl group in one molecule can be used.

Reactive vinyl groups of these compounds include styrene-based vinyl groups, acrylate-based vinyl groups, vinyl methacrylate-based groups, allyl-based vinyl groups, and vinyl ether-based ester vinyl groups such as vinyl acetate. A substituted or unsubstituted vinyl group is exemplified.

Specific examples of the polymerizable polymer precursor satisfying such conditions are as follows.

For example, styrene, methyl styrene, chlorostyrene, bromostyrene, methoxystyrene, dimethylaminostyrene, cyanostyrene, nitrostyrene, hydroxystyrene, aminostyrene, carboxystyrene,
Acrylic acid, methyl acrylate, ethyl acrylate, cyclohexyl acrylate, acrylamide, methacrylic acid, methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, phenyl methacrylate, cyclohexyl methacrylate, vinyl pyridine, N-vinyl Pyrrolidone, N-vinylimidazole,
Monovalent monomers such as 2-vinylimidazole, N-methyl-2-vinylimidazole, propyl vinyl ether, butyl vinyl ether, isobutyl vinyl ether, β-chloroethyl vinyl ether, phenyl vinyl ether, p-methylphenyl vinyl ether, p-chlorophenyl vinyl ether For example, divinylbenzene, distyryl oxalate, distyryl malonate, distyryl succinate, distyryl glutarate, distyryl adipate, distyryl maleate, distyryl fumarate, distyryl β, β′-dimethylglutarate, 2-bromoglutaric acid Distyryl, α,
Distilyl α'-dichloroglutarate, distyryl terephthalate, di (ethyl acrylate) oxalate, di (methyl acrylate) oxalate, di (ethyl acrylate) malonate, di (methyl ethyl acrylate) malonate, di (ethyl succinate) Acrylate), di (ethyl acrylate) glitarate, di (ethyl acrylate) adipic acid, di (ethyl acrylate) maleate, di (ethyl acrylate) fumarate, di (ethyl acrylate) β, β'-dimethylglutarate, ethylene Diacrylamide, propylene diacrylamide, 1,4-phenylenediacrylamide, 1,4-phenylenebis (oxyethyl acrylate), 1,4-phenylenebis (oxymethylethyl acrylate), 1,4-bis (acryloyloxyethoxy) Cyclohexene Emissions, 1,4-bis (acryloyloxy methylethoxy) cyclohexane, 1,
4-bis (acryloyloxyethoxycarbamoyl)
Benzene, 1,4-bis (acryloyloxymethylethoxycarbamoyl) benzene, 1,4-bis (acryloyloxyethoxycarbamoyl) cyclohexane, bis (acryloyloxyethoxycarbamoylcyclohexyl) methane, di (ethyl methacrylate) oxalate,
Oxalic acid di (methylethyl methacrylate), malonic acid di (ethyl methacrylate), malonic acid di (methylethyl methacrylate), succinic acid di (ethyl methacrylate), succinic acid di (methylethyl methacrylate), glutaric acid di (ethyl methacrylate) , Di (ethyl methacrylate) adipate, di (ethyl methacrylate) maleate, di (ethyl methacrylate) fumarate,
Di (methylethyl methacrylate) fumarate, β, β '
-Dimethylglutaric acid di (ethyl methacrylate), 1,
4-phenylenebis (oxyethyl methacrylate),
Divalent monomers such as 1,4-bis (methacryloyloxyethoxy) cyclohexaneacryloyloxyethoxyethyl vinyl ether; for example, pentaerythritol triacrylate, pentaerythritol trimethacrylate, petaerythritol tri (hydroxystyrene), dipentaerythritol hexaacrylate , Cyanuric acid triacrylate, cyanuric acid trimethacrylate, 1,1,1-trimethylolpropane trimethacrylate, 1,1,1-trimethylolpropane trimethacrylate, cyanuric acid tri (ethyl acrylate), 1,1,1-triic acid Methylolpropane tri (ethyl acrylate), cyanuric acid tri (ethyl vinyl ether), 1,1,1-trimethylolpropane tri (toluene diisocyanate) and hydroxyethyl acrylate And trivalent monomers such as condensates of 1,1,1-trimethylolpropane tri (hexane diisocyanate) and p-hydroxystyrene; for example, tetravalent such as ethylene tetraacrylamide and propylene tetraacrylamide And the like having a polymerizable unsaturated double bond in the side chain of the above monomer polymer compound.

Note that two or more of these polymerizable polymer precursors may be used.

As the reducing agent, the aforementioned JP-A-61-69062, 6
In addition to those described in JP-A Nos. 1-75342 and 62-70836, the following general formula (II) (II)
Compounds represented by I) are mentioned.

In the formulas (II) and (III), r ¹ and r ³ each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aralkyl group. And r ² , r ⁴ and r ⁵ are each independently a hydrogen atom,
Halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aralkyl group, an alkoxyl group, r ⁴ and r ⁵ is bonded to A ring compound may be formed. R represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group.

In general formulas (II) and (III), the unsubstituted alkyl group represented by r ¹ , r ² , r ³ , r ⁴ , r ⁵ , R is a straight-chain or branched alkyl group having 1 to 18 carbon atoms. Preferred are, for example, methyl, ethyl, propyl, i-propyl, butyl, t-butyl, i-butyl, amyl, i-amyl, hexyl, texyl, heptyl, octyl, nonyl, dodecyl, stearyl and the like.

Examples of the substituted alkyl group include an alkoxyalkyl group having 2 to 18 carbon atoms, a halogenoalkyl group having 1 to 18 carbon atoms, and a hydroxyalkyl group having 1 to 18 carbon atoms. Examples of the alkoxyalkyl group include methoxyethyl , Ethoxymethyl, ethoxyethyl, ethoxypropyl, ethoxybutyl, propoxymethyl, propoxybutyl, i-propoxypentyl, t-butoxyethyl, hexyloxybutyl and the like.

Examples of the halogenoalkyl group include chloromethyl, chloroethyl, bromoethyl, chloropropyl, chlorobutyl, chlorohexyl, and chlorooctyl.

As the hydroxyalkyl group, hydroxymethyl,
Hydroxyethyl, hydroxylpropyl, hydroxybutyl, hydroxypentyl, hydroxyhexyl, hydroxyheptyl and the like can be mentioned.

Aminoalkyl groups include aminomethyl, acetylaminomethyl, dimethylaminomethyl, aminoethyl,
Dimethylaminoethyl, diethylaminoethyl, morpholinoethyl, piperidinoethyl, aminopropyl, diethylaminopropyl, dipropylaminoethyl, aminobutyl, morpholinobutyl and the like.

Examples of the cycloalkyl group represented by r ¹ , r ² , r ³ , r ⁴ , and r ⁵ include a cyclopentyl, cyclohexyl, cycloheptyl group, and the like.

As the aralkyl group for r ¹ , r ² , r ³ , r ⁴ , r ⁵ and R, for example, benzyl, phenethyl, benzhydryl, trityl, phenylpropyl, naphthylmethyl, chlorobenzyl, dichlorobenzyl, methoxybenzyl, methylbenzyl And so on.

The aryl group has 6 to 16 carbon atoms and is preferably, for example, phenyl, naphthyl, anthryl, phenanthryl, tolyl, xylyl, cumenyl,
Methysyl, chlorophenyl, methoxyphenyl, fluorophenyl and the like.

The alkoxyl group represented by r ¹ , r ² , r ³ , r ⁴ and r ⁵ is preferably a substituted or unsubstituted alkoxyl group having 1 to 18 carbon atoms, for example, methoxy, ethoxy, propoxy, i-propoxy, Butoxy and the like.

The halogen atoms represented by r ² , r ⁴ and r ⁵ are a fluorine atom, a chlorine atom, a bromine atom and an iodine atom.

Among them, preferred substituents for r ² and r ⁴ are chlorine atom, bromine atom, methyl, ethyl, i-propyl, t-butyl, sec-amyl, texyl, ethoxymethyl, ethoxyethyl, chloromethyl, hydroxymethyl, Aminomethyl, dimethylaminomethyl and benzyl are particularly preferable substituents are a chlorine atom, methyl, t-butyl and texyl.

Preferred substituents for r ¹ and r ³ are a chlorine atom, methyl,
Ethyl, i-propyl, t-butyl, amyl, texyl, hydroxyl, chloromethyl, hydroxymethyl,
Benzyl and cyclohexyl are particularly preferred substituents are chlorine atom, methyl, t-butyl and texyl.

Preferred reducing agents represented by the general formula (II) include:
For example, 2,6-di-tert-butyl-4- (2-hydroxy-3-tert-butylbenzyl) phenol, 2,6-di-tert-butyl
-Butyl-4- (3,5-dichloro-4-hydroxybenzyl) phenol, 2,6-di-t-butyl-4- (3,5-
Dimethyl-4-hydroxybenzyl) phenol, 2,6
-Di-tert-butyl-4- (3-tert-butyl-4-hydroxybenzyl) phenol, 2,6-di-tert-butyl-4
-(3-cyclohexyl-4-hydroxybenzyl) phenol, 2-t-butyl-4- (2-hydroxy-3,
5-dimethylbenzyl) -5-methylphenol, 4,4 '
-Methylenebis (2,6-di-t-butylphenol),
4,4'-methylenebis (2-t-butyl-5-methylphenol), 4,4'-methylenebis (2-t-butyl-
6-benzylphenol), 4,4'-methylenebis (2
-T-butyl-6-methylphenol), 4,4'-ethylidenebis (2,6-di-t-butylphenol), 4,4 '
-Ethylidenebis (2-t-butyl-6-methylphenol), 4,4'-propylidenebis (2,6-di-t-butylphenol), 4,4'-butylidenebis (2,6-di-t
-Butylphenol), bis (3,5-di-t-butyl-)
4-hydroxyphenyl) phenylmethane, bis (3,5
-Di-tert-butyl-4-hydroxyphenyl) (4-methoxyphenyl) methane, bis (3,5-di-tert-butyl-4-hydroxyphenyl) (4-dimethylaminophenyl) methane, tris (3, 5-di-t-butyl-4-hydroxyphenyl) methane, 2-methyl-4- (3,5-
Dimethyl-4-hydroxyphenyl) methyl-1-naphthol, 2-t-butyl-4- (3,5-dimethyl-4-
(Hydroxyphenyl) methyl-1-naphthol, 2-methyl-4- (3,5-di-tert-butyl-4-hydroxyphenyl) methyl-1-naphthol, 2-methyl-4-
(3,5-di-i-propyl-4-hydroxyphenyl)
And methyl-1-naphthol.

Preferred reducing agents represented by the general formula (III) include, for example, 4,4'-methylenebis (2-methyl-1-naphthol) and 4,4'-methylenebis (2-t-
Butyl-1-naphthol), 4,4'-methylenebis (2
-T-butyl-6-methyl-1-naphthol), 4,4 '
-Ethylidenebis (2-methyl-1-naphthol), bis (4-hydroxy-3-methylnaphthyl) phenylmethane and the like.

In addition, as a reaction accelerator for the oxidation-reduction reaction, uracil, N-hydroxynaphthalimide, cyclic imides such as phthalimide and succinimide, cyclic hydrazides such as phthalic hydrazide and maleic hydrazide,
It is preferable to add phthalazinediones, phthalazines, phthalazinones and the like. Further, it is preferable to add a photopolymerization initiator for promoting the initiation of the polymerization reaction.

The preferred compounding ratio of the above components in the photosensitive material of the present invention is as follows.

The photosensitive silver halide salt is preferably used in an amount of 0.001 mol to 2 mol, more preferably 0.05 to 1.0 mol, per 1 mol of the organic silver salt.
It is desirable to contain it in molar. Further, preferably 0.05 mol to 3 mol of reducing agent to the organic silver salt to 1 mole, more preferably 0. ₂ mol to 1.3 cause the molar content is desirable.

Further, based on 100 parts by weight of the polymerizable polymer precursor,
It is desirable to use 0.1 to 300 parts by weight, preferably 5 to 50 parts by weight of a reducing agent. Also, polymerizable polymer precursor
In 100 parts by weight, at least 10 parts by weight of the compound of the formula (I), preferably 20 parts by weight or more, more preferably
It is desirable to use 30 parts by weight or more.

Further, when the composition is formed into a desired layer shape and a photoreceptor is molded, the above components are dissolved in a solvent together with a binder used as appropriate, and a metal foil, a plastic film, paper, baryta paper, synthetic paper, or the like is used. When the coating is dried on a support, or when the strength of the binder itself is maintained, the above-mentioned essential components may be contained in a film or a sheet-like material formed of the binder without using the support to be shaped. it can.

The shape of the photoreceptor of the present invention when formed into a desired shape is not particularly limited, such as a flat plate, a cylinder, or a roll. When formed in a layered form, the layer thickness is preferably 0.1 μm to 2 mm, and more preferably about 1 μm to 0.1 mm. Further, the photosensitive layer may be a single layer, or may be a multilayer, if necessary.

The binder that can be used in the present invention can be selected from a wide range of resins, and specifically, for example, nitrocellulose, cellulose phosphate, cellulose sulfate, cellulose acetate, cellulose propionate, cellulose butyrate, cellulose myristate , Cellulose esters such as cellulose palmitate, cellulose acetate / propionate, cellulose acetate / butyrate; cellulose ethers such as methyl cellulose, ethyl cellulose, propyl cellulose, butyl cellulose; and polystyrene, polyvinyl chloride, polyvinyl acetate, polyvinyl butyral , Polyvinyl acetal, polyvinyl alcohol, polyvinyl pyrrolidone and other vinyl resins; for example, styrene-butadiene copolymer, styrene-acrylonitrile copolymer Copolymer resins such as styrene-butadiene-acrylonitrile copolymer and vinyl chloride-vinyl acetate copolymer; for example, acrylic resins such as polymethyl methacrylate, polymethyl acrylate, polybutyl acrylate, polyacrylic acid, polymethacrylic acid, polyacrylamide, and polyacrylonitrile Kind;
Polyesters such as polyethylene terephthalate; poly (4,4-isopropylidene, diphenylene-co-1,4-cyclohexylene dimethylene carbonate), poly (ethylenedioxy-3,3'-phenylenethiocarbonate), Poly (4,4'-isopropylidene diphenylene carbonate-co-terephthalate), poly (4,4'-isopropylidene diphenylene carbonate), poly (4,4'-sec-butylidene diphenylene carbonate), poly (4 Polyacrylate resins such as 4,4'-isopropylidene diphenylene carbonate-block-oxyethylene); polyamides; polyimides;
Epoxy resins; phenolic resins; for example, polyolefins such as polyethylene, polypropylene and chlorinated polyethylene; and natural polymers such as gelatin.

In addition, a dye, a thermal antifoggant, an antistatic agent, a surfactant, and the like may be added as necessary.

〔Example〕

 Hereinafter, the present invention will be described with reference to examples.

Example 1 A solution having the following composition was applied to an aluminum plate having a thickness of 0.5 mm to a dry film thickness of 7 μm to form a polymerized layer.

-3 parts of polymethyl methacrylate-6 parts of chlorinated polyethylene-10 parts of No. 1 polymerizable polymer precursor-5 parts of dipentaerythritol hexaacrylate-2 parts of 2,4-diethylthioxanthone-4 parts of ethyl 4-dimethylaminobenzoate Parts ・ Toluene 80 parts ・ Methyl ethyl ketone 80 parts Next, 25 μm thick polyethylene terephthalate (PE
T) A film having a dry film thickness of 4
It was coated at a thickness of μm to provide a photosensitive layer. On this photosensitive layer, a polyvinyl alcohol layer was applied to a dry film thickness of 2 μm.

The polymer layer prepared above was laminated on the PET film to obtain a photoreceptor.

The obtained photoreceptor was image-exposed using a printer having a He-Ne laser, and then heated at 130 ° C for 15 seconds. Next, a fluorescent lamp with a fluorescent peak at 390nm (power consumption 15W) 3
Using a book, uniform exposure was performed for 10 seconds from a distance of 15 mm. When the PET film was peeled off from the photoreceptor after the overall exposure, a polymerized image remained on the aluminum plate.

When this was attached to a simple printing machine and printed at a speed of 120 sheets per minute, the printed matter after 20 minutes showed no deterioration in image quality compared to the initial one, and was good.

Comparative Example 1 In Example 1, of the compositions in which the polymerized layer was formed, N
A photoconductor was prepared in the same manner as in Example 1, except that the polymerizable polymer precursor in o.1 was changed to dipentaerythritol hexaacrylate, and a polymerized image was formed on an aluminum plate.

When this was attached to a printing press and printing was performed in the same manner as in Example 1, the printed matter after 20 minutes had a halftone portion crushed or chipped as compared with the initial one.

Example 2 A solution having the following composition was applied to a PET film having a thickness of 50 μm to a dry film thickness of 2 to 3 μm to form a color material layer.

-7.0 parts of polybutyl methacrylate-0.7 parts of MS-magenta-VP (manufactured by Mitsui Toatsu Chemicals)-60 parts of methyl ethyl ketone PET which is a support of the photosensitive layer prepared in Example 1
The following composition was applied on the film side at a dry film thickness of 4 μm to form a polymerized layer.

-Polyvinyl butyral 4.0 parts-No. 5 polymerizable polymer precursor 2.5 parts-Trimethylolpropane triacrylate 3.0 parts-Dipentaerythritol hexaacrylate 1.0 part-2,4-diethylthioxanthone 1.2 parts-4-Dimethylaminobenzoate ethyl 1.2 parts ・ Toluene 60 parts ・ Methyl ethyl ketone 40 parts The above PET film was laminated so that the polymer layer side and the colorant layer overlapped to obtain a photoreceptor.

The obtained photoreceptor was subjected to image exposure, heating and uniform exposure in the same manner as in Example 1, and the PET film coated with the photosensitive layer was peeled off. Next, the polymer layer was superimposed on the receiving paper coated with polyester and passed through a heat roller with a nip width of 4 mm adjusted to 115 ° C at a speed of 2 mm / sec.The magenta image corresponding to the image exposure unit was received. Formed on paper. The maximum optical density of the formed magenta image was 1.5 or more, and the fog density was 0.03 or less.

Comparative Example 2 A photoconductor was prepared by the same way as that of Example 2 except that the polymerizable polymer precursor No. 5 used for preparing the polymer layer in Example 2 was changed to trimethylolpropane triacrylate.

The image obtained by performing the image exposure, heating, uniform exposure and transfer process in the same manner as in Example 2 has a maximum optical density of 1.5
As described above, the fog density was 0.3 or more, which was not preferable.

〔The invention's effect〕

As described above, according to the present invention, a printing plate material having good printing durability and a photoreceptor capable of obtaining a high quality dye transfer image can be obtained.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tetsuro Fukui 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (72) Inventor Yuji Kondo 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon (56) References JP-A-61-260241 (JP, A) JP-A-2-51157 (JP, A) JP-A-48-26279 (JP, A) (58) Fields investigated (Int. Cl. ^6, DB name) G03F 7/06 501 G03F 7/027

Claims (1)

(57) [Claims] 1. A heat-developable photosensitive composition comprising at least a photosensitive silver halide, an organic silver salt and a reducing agent, and a photoreceptor containing a polymerizable polymer precursor, wherein the polymerizable polymer precursor is as follows: A photoconductor comprising a compound represented by formula (I). (Wherein, R ¹ , R ² , R ³ , R ⁴ , R ⁵ and R ⁶ are each independently a hydrogen atom or an alkyl group, and a ₁ , a ₂ , a ₃ , a ₄ , a ₅ And a ₆
Each independently represents a divalent group. ]