JPH0456848A - photosensitive material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a photosensitive material for forming images by a dry method.

[Prior Art] Energy used to form or record images includes light, sound, electricity, magnetism, heat, particle beams (electron beams, X-rays), and chemical energy.
Electrical, thermal energy, or a combination of these are often used.

For example, image forming methods using a combination of light energy and chemical energy include methods using silver salt photography, diazo copying paper, and the like. Further, as a method using a combination of light energy and electric energy, there is an electrophotographic system. Furthermore, methods that utilize thermal energy include methods that use thermal recording paper, transfer recording paper, etc., while methods that utilize electrical energy include methods that use electrostatic recording paper, current-carrying recording paper, discharge recording paper, etc. Are known.

Among the image forming methods described above, silver salt photography is one that allows high resolution images to be obtained. However, silver salt photography requires complex development and fixing processes using liquid agents, drying processes for images (prints), and the like.

On the other hand, dry silver salt photosensitive materials are known in which the developing process is performed using a dry process. In this method, exposed areas are developed by exposure and heating to form an image. Some compositions of such dry silver salt photosensitive materials include organic silver salts, silver halide, reducing agents, and toning agents.

A large number of compounds are known to be used as color toning agents, such as 2H-phthalazin-1-one, barbylic acid, saccharin and 2-mercaptobenzoxazole, phthalimides, and 2-acyl- Examples include 2H-phthalazin-1-ones. Also,
There are also heterocyclic compounds as described in Japanese Patent Publication No. 56-26011.

[Problems to be Solved by the Invention] However, with the light-sensitive materials using the above color toning agents, it is difficult to obtain good contrast in images, and the shelf life of the light-sensitive materials is not sufficient. In other words, the density in the image area may be too high, causing fog in the image, or
It had drawbacks such as sensitivity changing over time and being unstable.

The purpose of the present invention is to produce images with good contrast.
The present invention provides a photosensitive material that can be formed more quickly and stably.

[Means for Solving the Problem] The above object of the present invention is to provide at least an organic silver salt,
A photosensitive material containing silver halide, a reduction agent, and a color toning agent, wherein the color rRM is represented by the following general formula [wherein R is an alkoxyalkyl group having 2 to 18 carbon atoms] Alkoxyalkoxyl group, carbon number 1-18
This was achieved by a photosensitive material characterized by using at least one compound represented by the following formula: a halogenoalkyl group, a hydroxyalkyl group having 1 to 18 carbon atoms, or an aminoalkyl group having 1 to 18 carbon atoms.

That is, by using the compound represented by the general formula (I), it has become possible to stably obtain images with high density in exposed areas and good contrast with little fog in unexposed areas. Ta.

Further, according to the present invention, it is possible to provide a photosensitive material that has good storage durability and a long shelf life. Furthermore, compared to conventional color toning agents, it has the advantage of being effective even in a small amount, and having a high γ (gamma), which is convenient for conversion into a polymerized image. Here, γ refers to the slope of the straight line when the spectral characteristic curve of the photoreceptor is expressed with the exposure amount on the horizontal axis and the optical density on the vertical axis.

The present invention will be explained in detail below.

In general formula (1), the number of carbon atoms as a substituent represented by R is 2
-18 alkoxyalkyl groups include methoxyethyl, ethoxymethyl, ethoxyethyl, ethoxypropyl, ethoxybutyl, propoxymethyl, propoxybutyl, ■-propoxypentyl, t-butoxyethyl,
Examples include hexyloxybutyl.

As the alkoxyalkoxyl group having 2 to 18 carbon atoms,
Examples include methoxymethoxy, methoxyethoxy, ethoxyethoxy, ethoxypropoxy, i-propoxyethoxy, methoxybutoxy, ethoxybutoxy, and ethoxyhexyloxy.

Examples of the halogenoalkyl group having 1 to 18 carbon atoms include chloromethyl, chloroethyl, bromoethyl, chloropropyl, chlorobutyl, chlorohexyl, and chlorooctyl.

Examples of the hydroxyalkyl group having 1 to 18 carbon atoms include hydroxymethyl, hydroxyethyl, hydroxypropyl, hydroxybutyl, hydroxypentyl,
Examples include hydroxyhexyl and hydroxyheptyl.

Examples of the aminoalkyl group having 1 to 18 carbon atoms include:
Aminomethyl, acetylaminomethyl, dimethylaminomethyl, aminoethyl, acetylaminoethyl, dimethylaminoethyl, diethylaminoethyl, morpholinoethyl, piperidinoethyl, diethylaminopropyl, dipropylaminoethyl, acetylaminopropyl, aminobutyl, morpholinobutyl, etc. can be mentioned.

Specific examples of compounds represented by general formula (I) include:
7-Medoxyethyl-1,3-benzoxazinedione, 7-nitoxyethoxy-1,3-benzoxazinedione, 7-broboxymethyl-1,3-benzoxazinedione 57-chloropropyl-1,3-benzoxazinedione, etc. can be mentioned.

Examples of the silver halide contained in the light-sensitive material of the present invention include silver chloride, silver bromide, silver chlorobromide, silver iodobromide, and silver chloroiodobromide. The chemical sensitization or optical sensitization treatment that is performed on the As for the sensitivity, a method using a conventionally well-known sensitizing dye can be applied.

Sensitizing dyes include cyanine dyes, merocyanine dyes,
Trinuclear dyes etc. are preferably used 6 For example, 3,3'
-dicarboxyethyl-2,2'-thiacarbocyanine iodide, 3,3'-diethyl-2,2'-thiacarbocyanine iodide, 3,3'-disulfoethyl-2,2°-thiadicarbocyanine Iodide, 3,
3'-diethyl-2,2'-thiatricarbocyanine iodide and further, dyes having the following structural formula are preferably used.

Further, the halogen composition within the grains may be uniform or may have a multiple structure with different halogen compositions, and two or more types of silver halides having different halogen compositions, grain sizes, grain size distributions, etc. may be used in combination.

Regarding organic silver salts, "Fundamentals of Photographic Engineering" (1st edition,
(Published in 1982) Non-silver salt edition, p247, JP-A-1987-
Organic acid silver or triazole silver salts described in No. 55429 etc. can be used, and it is preferable to use silver salts with low photosensitivity6. For example, aliphatic carboxylic acids, aromatic carboxylic acids, mercapto groups or α - Silver salts such as thiocarbonyl group compounds having hydrogen and imino group-containing compounds.

Aliphatic carboxylic acids include acetic acid, butyric acid, succinic acid, sebacic acid, adipic acid, oleic acid, linoleic acid,
There are lyllonic acid, tartaric acid, balmitic acid, stearic acid, behenic acid, camphoric acid, etc., but in general, the smaller the number of carbon atoms, the more unstable it is as a silver salt. ) is preferred.

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

As the thiocarbonyl group compound having a mercapto group or α-hydrogen, 3-mercapto-4-phenyl-1,2
, 4-triazole, 2-mercaptobenzimidazole, 2-mercapto-5-aminothiadiazole, 2-
Mercaptobenzothiazole, S-alkylthioglycolic acid (alkyl group having 12 to 23 carbon atoms), dithiocarboxylic acids such as dithioacetic acid, thioamides such as thiostearamide, 5-carboxy-1-methyl-2-phenyl-
Examples include mercapto compounds described in U.S. Pat. No. 4,123,274, such as 4-thiopyridine, mercaptotriazine, 2-mercaptobenzoxazole, mercaptooxadiazole or 3-amino-5-benzylthio-1,2,4-triazole. It will be done.

As a compound containing an imino group, Japanese Patent Publication No. 44-30
270 or 45-18416, or derivatives thereof, such as benzotriazole, alkyl-substituted benzotriazoles such as methylbenzotriazole, halogen-substituted benzotriazoles such as 5-chlorobenzotriazole, butylcarboimidopencitriazo- , etc., nitrobenzotriazoles described in JP-A-58-118639, sulfobenzotriazole, carboxybenzotriazole or a salt thereof, or hydroxybenzotriazole described in JP-A-58-115638, etc. 1.2 described in Patent No. 4,220,709.
4-) Representative examples include lyazole, IH-tetrazole, carbazole, saccharin, imidazole and derivatives thereof.

On the reducing side, monophenols, bisphenols, trisphenols, tetrakisphenols, mononaphthols, bisnaphthols, dihydroxynaphthalenes, trihydroxynaphthalenes, dihydroxybenzenes, trihydroxybenzenes, and tetrahydroxybenzenes , hydroxyalkyl monoethers, ascorbic acids, 3-pyrazolidones, pyrazolines, pyrazolones, reducing sugars, phenylenediamines, hydroxyamines, reductones, hydrooxamic acids, hydrazones, amidoximes,
Mention may be made of N-hydroxyureas.

Furthermore, in the photosensitive material of the present invention, in order to obtain a polymerization pattern, the following general formula (II), (
Preference is given to using reducing agents of m) and (IV).

In the general formula (n), R1 and R2 each independently represent a hydrogen atom, a hydroxyl group, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted cycloalkyl group or substituted or unsubstituted aralkyl group alkoxyl group represents a substituted or unsubstituted amino group, m represents an integer of 1 to 3, A is a monovalent to trivalent group,
Substituted or unsubstituted aralkyl group Substituted or unsubstituted alkyl group Substituted amino group Divalent alkylidene group Aralkylidene group Indicates a trivalent methine group.

In the general formula (II), the unsubstituted alkyl groups of RI and R2 are preferably linear or branched alkyl groups having 1 to 18 carbon atoms, such as methyl, ethyl,
Propyl, i-propyl, butyl, t-butyl,
Examples include i-butyl, amyl, i-amyl, 5ee-amyl, thexyl, hexyl, heptyl, octyl, nonyl, dodecyl, and stearyl.

The substituted alkyl group of RI and R2 is preferably an alkoxyalkyl group having 2 to 18 carbon atoms, or an alkoxyalkyl group having 1 to 18 carbon atoms.
A halogenoalkyl group, a hydroxyalkyl group having 1 to 18 carbon atoms, an aminoalkyl group having 1 to 18 carbon atoms, and the like.

For example, alkoxyalkyl groups include methoxyethyl, ethoxymethyl, ethoxyethyl, ethoxypropyl, ethoxybutyl, propoxymethyl, propoxybutyl, i-propoxypentyl, t-butoxyethyl,
Examples include hexyloxybutyl.

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

Examples of the hydroxyalkyl group include hydroxymethyl, hydroxyethyl, hydroxypropyl, hydroxybutyl, hydroxypentyl, hydroxyhexyl, hydroxyhebutyl, and the like.

Examples of the aminoalkyl group include aminomethyl, acetylaminomethyl, dimethylaminomethyl, aminoethyl, acetylaminoethyl, dimethylaminoethyl,
Examples include diethylaminoethyl, morpholinoethyl, piperidinoethyl, diethylaminopropyl, dipropylaminoethyl, acetylaminopropyl, aminobutyl, morpholinobutyl, and the like.

Examples of the alkenyl group for R1 and R2 include vinyl, allyl, prenyl, butenyl, pentenyl, hexenyl, heptenyl, octenyl, and the like.

Examples of the alkynyl group include acetyl, propargyl, butynyl, pentynyl, hexynyl, heptenyl, octenyl, and the like.

Examples of the cycloalkyl group include cyclopentyl,
Cyclohexyl and cycloheptyl.

Examples of the aralkyl group represented by R1 and R2 include benzyl, phenethyl, and tolylmethyl.

The amino groups represented by R1 and R2 include, for example, acetylamine, dimethylamine, diethylamine,
Amino etc.

As the alkoxyl group represented by R1 and R2,
For example, methoxy, ethoxy, propoxy, etc.

Among the above, preferred substituents for R2 are a chlorine atom,
Bromine atom, methyl, ethyl, 1-propyl, t-butyl, 5ee-amyl, thexyl, ethoxymethyl, ethoxyethyl, chloromethyl, hydroxymethyl, aminomethyl, dimethyl-aminomethyl, benzyl. R.I.
Preferred substituents are chlorine atom, methyl, ethyl, i-propyl, t-butyl, amyl, thexyl, hydroxyl, chloromethyl, hydroxymethyl, benzyl, and cyclohexyl.

Examples of monovalent substituted or unsubstituted aralkyl groups as A include benzyl, p-methoxybenzyl,
p-N, N-dimethylaminobenzyl, p-pyrrolidinobenzyl, p-methylbenzyl, p-hydroxybenzyl, p-chlorobenzyl, 3,5-dichloro-4-hydroxybenzyl, 3-methyl-5-t- Butyl-4-
hydroxybenzyl, o,p-dimethylpencil, 3.
Examples include 5-dimethyl-4-hydroxybenzyl, 2-hydroxy-3-t-butyl-5-methylbenzyl, naphthylmethyl, and the like.

Examples of monovalent substituted or unsubstituted alkyl groups as A include methyl, ethyl, i-propyl, N,N-dimethylaminomethyl, N-benzylaminomethyl, methoxymethyl, ethoxymethyl, hydroxymethyl, and methoxy. carbonylethyl, methoxycarbonylmethyl,
Examples include ethoxycarbonylethyl.

Examples of the substituted amino group of the monovalent group include methylamino, dimethylamino, diethylamino, acetylamino, phenylamino, diphenylamino, triadylamino, and the like.

Examples of the divalent alkylidene group include methylene, ethylidene, propylidene, butylidene, and the like.

Examples of the divalent aralkylidene group include benzylidene, p-methylbenzylidene, and p-dimethylaminobenzylidene.

Among these, preferable groups as A include monovalent aralkyl group, divalent alkylidene group, and aralkylidene group.
A trivalent methine group, a monovalent aralkyl group and a divalent alkylidene group are particularly preferred groups.

Next, specific examples of preferable reducing agents among the reducing agents represented by general formula (II) will be listed, but the present invention is not limited thereto.

2.4-dimethyl-6-t-butylphenol, 2-methyl-4-1-propyl-6-t-butylphenol,
2,6-di-t-butyl-4-dimethylaminophenol, 2,6-di-t-butyl-4-hydroxymethylphenol, 2-t-butyl-6-benzyl-4-methylphenol, 2,6-di-t-butyl-4-methylphenol -butyl-4-o-tolylmethylphenol, 2,6-di-t-butyl-4-benzylphenol, 2-t-butyl-4-(p-methoxybenzyl)-5-methylphenol, 2,6-dimethylphenol 4
-(α-naphthylmethyl)phenol, 2.6-sheet
~butyl-4-(2-hydroxy-3-t-butyl-5
-methylbenzyl)phenol, 2-t-butyl-4(
p-chlorobenzyl)-6-cyclohexylphenol, 2-t-butyl-4-(2-hydroxy-3,5-dimethylbenzyl)-5-methylphenol, 2-t-butyl-4benzyl-6-propanol Gylphenol, 2,6
-di-butyl-4-(3,5-dichloro-4-hydroxybenzyl)phenol, 2,6-di-butyl-4-(3,5-dimethyl-4-hydroxybenzyl)
Phenol, 2,6-ditexyl-4-(4-hydroxybenzyl)phenol, 2-texyl-4-benzyl-5-methylphenol, 2-allyl-4-benzyl-
5-methylphenol, 2-texyl-4-(p-chlorobenzyl)-5-allylphenol, 2-chloro-4
-dimethylaminomethylphenol, 2,6-di-
Propyl-4-diethylaminophenol, 2-t-butyl-4-(2-hydroxy-3-t-butyl-5-methylbenzyl)phenol, 4,4'-methylenebis(
2,6-di-t-butylphenol), 4,4″-methylenebis(2-t-butyl-5-methylphenol),
4,4″-methylenebis(2-t-butyl-6-methylphenol), 4,4-methylenebis(2-texyl-6-methylphenol), 4,4′-methylenebis(
2-cyclohexyl-6-methylphenol), 4,4
゛-Methylenebis(2-dichlorohexyl-6-t-butylphenol), 4,4'ethylidenebis(2,6-
di-t-butylphenol), 4,4'-ethylidenebis(2-t-butyl-6-methylphenol), 4,4
'-Ethylidenebis (2-cyclohexyl-6-methylphenol), 4,4'-ethylidenebis (2-texyl-6-methylphenol), 4,4''-propylidenebis (2,6-di-t-butylphenol) ), 4.4'
Butylidene bis(2-tert-butyl-6-methylphenol), 4.4″-butylidene bis(2-t-butyl-6-methylphenol),
゛Methylphenol), 4,4'-butylidene bis(2
-dichlorohexyl-6-methylphenol), bis(
3,5-di-butyl-4-hydroxyphenyl) phenylmethane.

Bis(3,5-di-t-butyl-4-hydroxyphenyl)(4-methoxyphenyl)methane, bis(3,5-
di-t-butyl-4-hydroxyphenyl)(4-dimethylaminophenyl)methane, tris(3,5-di-
t-Butyl-4-hydroxyphenyl)methane, bis(
3-t-butyl-4hydroxy-5-methylphenyl)
phenylmethane, etc.

Among these, particularly preferable reducing agents include 2,6-di-butyl-4-0-)lylmethylphenol, 2,6-dibutyl-4-0-
Di-t-butyl-4-benzylphenol, 2,6-di-t-butyl-4-(2-hydroxy-3-t-butyl-5-methylbenzyl)phenol, 2,6-di-t-butyl-4-(2-hydroxy-3-t-butyl-5-methylbenzyl)phenol
Butyl-4-(3,5-dimethyl-4-hydroxybenzyl)phenol, 4,4'-methylenebis(2,6-
di-t-butylphenol), 4.4″-methylenebis(2-t-butyl-5-methylphenol), 4,4″-methylenebis(2-t-butyl-6-methylphenol), 4,4″-ethylidene bis(2,6-di-t-butylphenol), 4,4'-ethylidene bis(2-t
-butyl-6-methylphenol), 4,4'-propylidenebis(2,6-di-t-butylphenol), 4
, 4'-butylidene bis(2-cyclohexyl-6-methylphenol), bis(3,5-di-t-butyl-4
-hydroxyphenyl)phenylmethane, bis(3,
5-di-t-butyl-4-hydroxyphenyl) (4-
methoxyphenyl)methane, bis(3,5-di-t-butyl-4-hydroxyphenyl)(4-dimethylaminophenyl)methane, tris(3,5-di-t-butyl-
4-hydroxyphenyl)methane.

Examples of the reducing agent that becomes a light-absorbing organic compound through a redox reaction include a compound represented by the following general formula (m).

H In the general formula (m), R5 represents a hydrogen atom, an alkyl group, a cycloalkyl group, an aralkyl group, and f(2, R4
, and R6 each independently represent a hydrogen atom, a halogen atom, an alkyl group, an amino group, an aryl group, an aralkyl group, an alkoxyl group, a nitro group, an acyl cyano group, and R
7 represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, and al is a hydrogen atom, a hydroxyl group, a halogen atom, a substituted or unsubstituted alkyl group, a cycloalkyl group, an alkoxyl group, a substituted or unsubstituted amino represents a group.

In general formula (III), al, R3, R' and R6
Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.

at, R", R', R', R' and R7 are preferably substituted or unsubstituted chain or branched alkyl groups having 1 to 18 carbon atoms, such as methyl, ethyl, propyl, ]- Straight chain or branched hydrocarbon groups such as propyl, butyl, t-butyl, l-butyl, amyl, l-amyl, hexyl, thexyl, heptyl, octyl, nonyl, dodecyl, stearyl, methoxyethyl, ethoxyethyl, ethoxypropyl, Linear or branched alkoxyalkyl groups such as ethoxybutyl, propoxybutyl, 1-propoxypentyl, t-butoxyethyl, hexyloxybutyl, hydroxymethyl, hydroxyethyl, hydroxypropyl, hydroxybutyl, hydroxypentyl,
Hydroxyalkyl group such as hydroxyhexyl, hydroxyhebutyl, aminomethyl, dimethylaminomethyl,
Aminoalkyl or alkylaminoalkyl groups such as aminoethyl, dimethylaminoethyl, diethylaminoethyl, morpholinoethyl, piperidinoethyl, aminopropyl, diethylaminopropyl, dipropylaminoethyl, aminobutyl, and morpholinobutyl.

The cycloalkyl group for a and R5 is preferably a substituted or unsubstituted cycloalkyl group having 5 to 18 carbon atoms, such as cyclopentyl, cyclohexyl, cyclohebutyl, cyclooctyl, methylcyclohexyl, dimethylcyclohexyl, Ethylcyclohexyl group, etc.

The amino groups for a, , R'', R' and R6 are substituted or unsubstituted amino groups, such as amino groups.
These include acetylaminos, methylamis, dimethylaminos, diethylamis, viroridias, morpholites, benzenesulfonamide, toluenesulfonamide, dipropylaminos, and dibutylamino groups.

The aryl group for R2, R4, R6 and R7 is preferably a substituted or unsubstituted aryl group having 6 to 16 carbon atoms, such as phenyl, naphthyl, anthryl, phenanthryl, tolyl, xylyl, cumenyl, mesityl, chlorophenyl, methoxy. These include phenyl and fluorophenyl groups.

The a, , R', R' and R6 alkoxyl groups are preferably substituted or unsubstituted alkoxyl groups having 1 to 18 carbon atoms, such as methoxy, ethoxy,
These include propoxy, i-propoxy, butoxy, and the like.

As the aralkyl group of R3, R4, R6 and R6,
Substituted or unsubstituted aralkyl groups having 7 to 19 carbon atoms are preferred, such as benzyl, phenethyl, benzhydryl, trityl, phenylpropyl, naphthylmethyl, chlorobenzyl, dichlorobenzyl, methoxybenzyl, and methylbenzyl groups.

Examples of the acyl group for R'a, Ra and R6 include acetyl and propionyl.

Specific examples of compounds represented by the general formula (m) having the above substituents include 4.4'-methylenebis(2-methyl-1-naphthol), 4.4''-methylenebis(2-ethyl-1- naphthol), 4.4°-methylenebis(2-t-butyl-1
-naphthol), 4.4'-methylenebis(2-cyclohexyl-1-naphthol), 4,4'-methylenebis(2-t-butyl-6-methyl-■-naphthol), 4
．． 4'-methylenebis(2,6-ethyl-naphthol), 4,4'-methylenebis(2-benzyl-1-
naphthol), 4.4'-methylenebis(2-t-butyl-8-methyl-l-naphthol), 4.4''-methylenebis(2-methyl-5-chloro-1-naphthol),
4,4'-methylenebis(2-methyl-8-dimethylamino-1-naphthol), 4,4''-methylenebis(
2-methyl-5-benzylnaphthol), 4,4'-methylenebis(2-methyl-5-methoxy-1-naphthol), 4,4'-methylenebis(2-methyl-5-phenyl-1-naphthol), 4-(3'-cyclohexyl-4'-hydroxynaphthyl)methyl-2-methyl-1
-naphthol, 4-(3°-t-butyl-4'-hydroxynaphthyl)methyl-2-methyl-1-naphthol.

4-(3'-cyclohexyl-4''~hydroxynaphthyl)methyl-2-t-butyl-1-naphthol, 4,4
'-Benzylidene bis(2-methyl-1-naphthol)
4.4'-benzylidenebis(2-methyl-1-naphthol), 4,4'-benzylidenebis(2-t-butyl-1-naphthol), 4.4'-ethylidenebis(
2-methyl-1-naphthol), 4.4”-ethylidenebis(2-t-butyl-1-naphthol), bis(4-
Hydroxy-3-methylnaphthyl)tolylmethane and the like.

As yet another reduction compound that becomes a light-absorbing organic compound through a redox reaction, there may be mentioned a compound represented by the following general formula (rV).

In the general formula (IV), RI, RQ, RI1 and R1+ each independently represent a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, a cycloalkyl group, an alkoxyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aralkyl group, or a substituted or unsubstituted aralkyl group. An aryl group, a substituted or unsubstituted amino group, a nitro group, an acyl group, Z is a divalent L, ag and a3 are a hydrogen atom, a hydroxyl group, a halogen atom,
Substituted or unsubstituted alkyl group, alkoxyl group Represents a substituted or unsubstituted amino group, -at least one of a2 and a3 is a hydroxyl group.

In the general formula (IV), RI, R', l
The halogen atoms represented by i I @ , R11, a2 and a are fluorine, chlorine, bromine and iodine.

In the general formula (IV), R11J9JIQ, RI
, a.

The alkyl group represented by and a is preferably a straight chain or branched alkyl group having 1 to 18 carbon atoms, such as methyl, ethyl, propyl, i-propyl, butyl, t-butyl, i-butyl, amyl , i-amil,
5ec-amyl, thexyl, hexyl, heptyl, octyl, nonyl, dodecyl, stearyl, etc.
The substituted alkyl group is preferably an alkoxyalkyl group having 2 to 18 carbon atoms, a halogenoalkyl group having 1 to 18 carbon atoms, or a hydroxyalkyl group having 1 to 18 carbon atoms.
Aminoalkyl groups having 1 to 18 carbon atoms, such as methoxyethyl, ethoxymethyl, ethoxyethyl, ethoxypropyl, ethoxybutyl, propoxybutyl, l-propoxypentyl, t-butoxyethyl, hexyloxybutyl, chloromethyl, Chloroethyl, bromoethyl, chloropropyl, chlorobutyl, chlorohexyl, chlorooctyl, hydroxymethyl, hydroxyethyl, hydroxypropyl, hydroxybutyl, hydroxypentyl, hydroxyhexyl, hydroxyhebutyl, aminomethyl, acetylaminomethyl, dimethylaminomethyl, aminoethyl , acetylaminoethyl, dimethylaminoethyl, diethylaminoethyl, morpholinoethyl, piperidinoethyl, diethylaminopropyl, dipropylaminoethyl, aminopropyl, acetylaminopropyl, aminobutyl, morpholinobutyl, and the like.

The aryl group represented by RI, R11, R1@ and R11 is, for example, phenyl, naphthyl, anthryl, phenanthryl, and the substituted aryl group is,
For example, tolyl, xylyl, cumenyl, mesityl,
These include chlorophenyl, methoxyphenyl, fluorophenyl groups, etc.

Aralkyl groups represented by R11, RQ, RI 8 and RI+ include, for example, benzyl, phenethyl, benzhydryl, trityl, phenylpropyl, naphthylmethyl, etc. Substituted aralkyl groups include, for example, chlorobenzyl, dichlorobenzyl, methoxybenzyl, and methyl. Such as benzyl.

RI, RI, RI 11, RI I,
The cycloalkyl group represented by a2 and a3 is, for example, a 5-, 6-, or 7-membered cycloalkyl group, which may be substituted with an alkyl group.

Examples of the alkoxyl groups represented by RI, IQ, R1m, R11, @, and a3 include methoxy, ethoxy, propoxy, butoxy, i-propoxy, benzyloxy, and 2-phenylethoxy.

Al! Examples of the substituted or unsubstituted amino group represented by a3 include acetylamino, methylamino, isopropylamino, dimethylamino, phenylamino, diethylamino, cyclopentylamino, cyclopentylmethylamino, cyclohexylamino, piperidino, pyrrolidino, etc. .

2 represents a divalent group, such as an alkylidene group or an aralkylidene group, specifically methylene, ethylidene, propylidene, benzylidene, cinnamylidene, p-
Hydroxybenzylidene, p-methylbenzylidene, p
-dimethylaminobenzylidene and the like are preferred.

Specific examples of particularly preferred compounds among the compounds represented by the above general formula (IV) are listed below, but the present invention is not limited thereto.

As a specific example of the compound represented by the general formula (IV), 2
-Methyl-4-(3,5-dimethyl-4-hydroxyphenyl)methyl-1-naphthol, 2-methyl-4-(
3,5-di-1-butyl-4-hydroxyphenyl)methyl-1-naphthol, 2-methyl-4-(4-hydroxyphenyl)methyl-1-naphthol, 2-methyl-
4-p-Tolylmethyl-1-naphthol, 2-methyl-
4-benzyl-1-naphthol, 2-t-butyl-4-
(4-hydroxyphenyl)methyl-1-naphthol,
2-Methyl-4-(3,5-dichloro-4-hydroxyphenyl)methyl-1-naphthol.

2-ethyl-4-(3,5-di-butyl-4-hydroxyphenyl)methyl-1-naphthol, 2-methyl-4-(3,5-dimethoxy-4-hydroxyphenyl)methyl-1-naphthol, 2-Methyl-4-(3-methyl-4-hydroxyphenyl)methyl-1-naphthol, 2-t-butyl-4-(3-t-butyl-4-hydroxyphenyl)methyl-1-naphthol, 2,6 -di-t-butyl-4-α-naphthylmethylphenol, 2,
6-di-t-butyl-4-methoxynaphthylmethylphenol, 2-methyl-4-(3-chloro-4-hydroxyphenyl)methyl-1-naphthol, 2-methyl-4
-(4-dimethylaminophenyl)methyl-1-naphthol, 2-ethyl-4-diphenylmethyl-1-naphthol, 2-methyl-4-(3-cyclohexyl-4-hydroxyphenyl)methyl-1-naphthol , 2-methyl-4(3-phenyl-4-hydroxyphenyl)methyl-1-naphthol, 2-methyl-4-(3-t-butyl-4-hydroxy-5-methylphenyl)methyl-1
-Naphthol, 2methyl-4-benzyl-6-methyl-
1-naphthol and the like.

In addition, the above-mentioned reducing agent (general formula (II), (I[[), (■
)), two or more of them may be used in combination.

Further, it may be used in combination with a conventional reducing agent other than the reducing agent mentioned above.

When obtaining a polymerized image using the photosensitive material of the present invention, a photopolymerization initiator and a polymerizable polymer precursor may be used.

Examples of the photopolymerization initiator include carbonyl compounds, sulfur compounds, halogen compounds, redox photopolymerization initiators, and peroxide initiators sensitized with dyes such as biryllium.

Specifically, carbonyl compounds include, for example, diketones such as benzyl, 4,4'-dimethoxybenzyl, diacetyl, and camphorquinone; for example, 4,4''-bis(diethylamino)benzophenone, and 4,4'-dimethoxybenzophenone. Benzophenones such as acetophenone and 4-methoxyacetophenone; Benzoin alkyl ethers such as 2-chlorothioxanthone, 2,4-cyclothioxanthone, 2,4-diethylthioxanthone, thioxanthone-3-carboxylic acid- Thioxanthone such as β-methoxyethyl ester; chalcone and styryl ketone having dialkylamino group; 3,3''-carbonylbis(7-medoxycoumarin), 3,3'-carbonylbis(7-dinitylamino Examples include coumarins such as coumarin).

Examples of the sulfur compound include dipenzothiazolyl sulfide, decylphenyl sulfide, and disulfides.

Examples of halogen compounds include carbon tetrabromide, quinolinesulfonyl chloride, and S having a trihalomethyl group.
- Triazines and the like.

Redox-based photopolymerization initiators include those used in combination with trivalent iron ion compounds (e.g. ferric ammonium citrate) and peroxide, and those used in combination with photoreducible dyes such as riboflavin and methylene blue and triethanolamine. Among the photopolymerization initiators (including sensitizers) mentioned above, there are photopolymerization initiators that are used in combination with reducing agents such as ascorbic acid. Polymerization can also be carried out.

Examples of such a combination of photopolymerization initiators include a combination of chalcones, styryl ketones, and coumarins having a dialkylamino group, and S-triazines and camphorquinone having a trihalomethyl group.

The photosensitive material of the present invention has a photosensitive wavelength range of 370 to 520 nm.
A photopolymerization initiator of m is preferably used.

In the present invention, it is necessary to appropriately select the photopolymerization initiator to be used depending on the light absorption characteristics of the light-absorbing organic compound produced by the redox reaction of the reducing agent.

An example of such a combination of a reducing agent and a photopolymerization initiator is listed below.

For example, as a reducing agent, 4,4'-propylidene bis(
2,6-di-t-butylphenol), 4,4'-butylidenebis(3-methyl-6-t-butylphenol)
, 4,4'-methylenebis(2,6-di-t-butylphenol), 4,4'-methylenebis(2-t-butyl-6-methylphenol), 2,6-di-butyl-4-(3, 5-dimethyl-4-hydroxyphenyl)methylphenol, 2-methyl-4(3,5-dimethyl-
When using 4-hydroxyphenyl)methyl-1 naphthol, a photopolymerization initiator sensitive to 380 nm to 420 nm, such as 2-chlorothioxanthone,
2-Methylthioxanthone, 2,4-dimethylthioxanthone, 2,4-diethylthioxanthone, 3,3'-
Carnilbis (7-medoxycoumarin), 2.4.6-
Preferred are dolimethylbenzoyldiphenylphosphine oxide, benzyl, and the like.

In addition, as a reducing agent, 2,6-di-t-butyl-4-(
2-Hydroxy-3-1-butyl-5-methylbenzylphenol, 2,6-di-t-butyl-4-benzylphenol.

When using 2.6-di-t-butyl-4-0-tolylmethylphenol, a photopolymerization initiator sensitive to 300 to 380 nm, such as 1-phenyl-2-hydroxy-2-methylpropane- 1-one, l-hydroxycyclohexylphenyl ketone, benzyl dimethyl ketal, benzophenone, 4-benzoyl-4'-methyl-diphenyl sulfide and the like are preferred.

Further, as a reducing agent, for example, bis(3,5-di-t-
Butyl-4-hydroxyphenyl)(4-dimethylaminophenyl)methadane, 4.4°-methylenebis(2-
methyl-1-naphthol), 4,4'-methylenebis(
2-ethyl-1-naphthol), 4,4'-methylenebis(2-cyclohexyl-1-naphthol), 4,4°
- When using methylenebis(2-t-butyl-1-naphthol) or the like, a photopolymerization initiator having sensitivity at 400 to 520 nm, for example.

3.3'-Carbonylbis(7-dimethylaminocoumarin), boflavin tetrabutyrate, or a combination of a merocyanine dye and a trichloromethyl-5-triazine compound are preferred.

Further, as the polymerizable polymer precursor, a compound having at least one reactive vinyl group in the molecule can be used.

The reactive vinyl groups of these compounds include styrene vinyl groups, acrylic acid vinyl groups, methacrylic acid vinyl groups, allyl vinyl groups, vinyl ethers, and substituted or unsubstituted ester vinyl groups such as vinyl acetate. Examples include vinyl groups.

Specific examples of polymerizable polymer precursors that satisfy these conditions are as follows.

For example, styrene, methylstyrene, chlorthrene, 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, vinylpyridine, N-
Vinylpyrrolidone, N-vinylimidazole, 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-chlorphenyl Monovalent monomers such as vinyl ether; divinylbenzene, distyryl oxalate, distyryl malonate, distyryl succinate, distyryl glutarate,
distyryl adipate, distyryl maleate, distyryl fumarate, β, β'-dimethylglutarate distyryl, 2-bromoglutarate distyryl, α, α-dichloroglutarate distyryl, distyryl terephthalate,
Dioxalate (ethyl acrylate), dioxalate (methyl acrylate), dimalonate (ethyl acrylate)
, malonic acid di(methyl ethyl acrylate), succinic acid di(ethyl acrylate), glitaric acid di(ethyl acrylate), adipic acid di(ethyl acrylate), maleic acid di(ethyl acrylate), fumaric acid di(ethyl acrylate), β,β′-dimethylglutarate di(
ethyl acrylate), ethylene diacrylamide, propylene diacrylamide, 1.4-phenylene diacrylamide, 1.4-phenylene bis(oxyethyl acrylate), 1.4-phenylene bis(oxymethyl ethyl acrylate), 1. 4-bis(acryloyloxyethoxy)cyclohexane, 1,4-bis(acryloyloxymethylethoxy)cyclohexane, 1.4
-Bis(acryloyloxyethoxycarbamoyl)benzene, 1,4-bis(acryloyloxymethylethoxycarbamoyl)benzene, 1,4-bis(acryloyloxyethoxycarbamoyl)cyclohexane, bis(acryloyloxyethoxycarbamoylcyclohexyl)methane, dioxalate (ethyl methacrylate)
, dioxalate (methyl ethyl methacrylate), di malonate (ethyl methacrylate), di malonate (methyl ethyl methacrylate), di succinate (ethyl methacrylate), di succinate (methyl ethyl methacrylate)
, glutaric acid di(ethyl methacrylate), adipic acid di(ethyl methacrylate), maleic acid di(ethyl methacrylate), fumaric acid di(ethyl methacrylate)
, fumaric acid di(methyl ethyl methacrylate), β, β
'-Dimethylglutarate di(ethyl methacrylate),
1. Divalent monomers such as 4-phenylene bis(oxyethyl methacrylate), 1,4-bis(methacryloyloxyethoxy)cyclohexane acryloyloxyethoxyethyl vinyl ether; pentaerythritol triacrylate, pentaerythritol trimethacrylate, pentaerythritol triacrylate (hydroxystyrene), dipentaerythritol hexaacrylate, cyanuric acid triacrylate, cyanuric acid trimethacrylate, 1,1.1-trimethylolpropane triacrylate, 1. l, l-trimethylolpropane trimethacrylate, cyanuric acid tri(ethyl acrylate)
, 1,1.1-trimethylolpropane tri(ethyl acrylate), cyanuric acid tri(ethyl vinyl ether), condensate of 1,1.1-trimethylolpropane tri(toluene diisocyanate) and hydroxyethyl acrylate, 1.1 .Trivalent monomers such as condensates of 1-trimethylolpropane tri(hexane diisocyanate) and p-hydroxystyrene; Tetravalent monomers such as ethylenetetraacrylamide and propylenetetraacrylamide; Examples include those having a polymerizable functional group.

Note that, as described above, two or more of these polymerizable polymer precursors may be used.

When forming an image forming medium, it is preferable to contain an appropriate binder for the purpose of improving film properties and dispersibility of the medium.

Examples of binders include cellulose esters such as nitrocellulose, cellulose phosphate, cellulose sulfate, cellulose acetate, cellulose propionate, cellulose butyrate, cellulose myristate, cellulose palmitate, cellulose acetate/propionate, cellulose acetate/butyrate; methyl cellulose; Cellulose ethers such as ethyl cellulose, propyl cellulose, and butyl cellulose; Vinyl resins such as polystyrene, polyvinyl chloride, polyvinyl acetate, polyvinyl butyral, polyvinyl acetal, polyvinyl alcohol, and polyvinylpyrrolidone; Styrene-butadiene copolymer, styrene-acrylonitrile copolymer Copolymer resins such as , styrene-butadiene-acrylonitrile copolymer, vinyl chloride-vinyl acetate copolymer: polymethyl methacrylate, polymethyl acrylate, polybutyl acrylate, polyacrylic acid, polymethacrylic acid, polyacrylamide,
Acrylic resins such as polyacrylonitrile; Polyesters such as polyethylene terephthalate; For example, poly(4,4-isopropylidene, diphenylene-ni-1)
．． 4-cyclohexylene dimethylene carbonate), poly(ethylenedioxy-3,3°-phenylene thiocarbonate), poly(4,4'-isobropylidene diphenylene carbonate coated terephthalate), poly(4-cyclohexylene dimethylene carbonate), poly(4-cyclohexylene dimethylene carbonate),
, 4″-isopropylidene diphenylene carbonate)
, polyacrylate resins such as poly(4,4'-5ec-butylidene diphenylene carbonate), poly(4,4'' isopropylidene diphenylene carbonate-block-oxyethylene); polyamides; polyimides; epoxy resins ; Phenol resins; Polyolefins such as polyethylene, polypropylene, and chlorinated polyethylene; and natural polymers such as gelatin.

In addition, color tone agents, antifogging agents, alkali generators, autooxidizing agents, and the like may be added to the light-sensitive material of the present invention, if necessary.

The preferred blending ratio of the above components in the photosensitive material of the present invention is as shown below.

On the color tone side, the amount is 0.01 mol to 5 mol relative to the organic silver salt.

Preferably 0.05 mol to 2 mol, more preferably 0
．． It is preferable to contain 08 mol to 1 mol.

The amount of organic silver salt contained is 0.3 to 30 g/m2,
In particular, 0.7 to 15 g/m2, more preferably 1.2 to 8 g/m2.

Furthermore, silver halide is preferably 0.001 to 2 mol, more preferably 0.05 to 2 mol, per 1 mol of organic silver salt.
It is desirable to contain 1 mole of the reducing side, and preferably 0.05 to 3 moles, more preferably 0.2 to 1.3 moles of the reducing side per mole of the organic silver salt.

Furthermore, the photopolymerization initiator contained in order to form a polymerized image is preferably 0.1 to 30 parts by weight, more preferably 0.1 to 30 parts by weight, based on 100 parts by weight of the polymerizable polymer precursor.
It is desirable to use 5 to 10 parts by weight.

In addition, the photopolymerization initiator is preferably 0.01 to 10 mol, more preferably 0.5 to 3 mol per mol of reduction.
It is preferable to use moles.

The amount of the binder contained if necessary is preferably 0 to 10 parts by weight, more preferably 0.5 to 5 parts by weight, per 1 part by weight of the organic silver salt.The amount of binder contained in the polymer layer is: The ratio is preferably 0 to 10 parts by weight per 1 part by weight of the polymerizable polymer precursor.

The photosensitive material of the present invention can be prepared by dissolving the above components in a solvent together with an appropriately used binder and coating and drying the solution on a support such as metal foil, plastic film, baryta grade synthetic paper, or by using the binder itself to maintain its strength. In the case of dripping, the image forming medium can be formed by incorporating the above-mentioned essential components into a film or sheet-like material formed from a binder without using a support.

[Example J Hereinafter, the present invention will be specifically explained with reference to Examples, but the present invention is not limited to these examples. In the following description, parts represent parts by weight.

Synthesis Example 7 - Synthesis of medoxyethyl-1,3-benzoxazinedione Synthesis was carried out according to the following reaction scheme.

50.0 g of 4-methoxyethylsalicylic acid and 300 ml of THF were added to 1 liter of Kolben and dissolved with stirring. 91.6 ml of triethylamine was added under water cooling, and the reaction system was cooled to 5° C. or lower. To this, 71.4 g of ethyl chlorocarbonate was added dropwise over about 1 hour while being careful not to let the temperature of the reaction system rise above 5°C. After further stirring at 5°C for 20 minutes, 28% aqueous ammonia 601 was gradually added at a temperature of 20°C or lower. After the addition was completed, the mixture was stirred for 20 minutes, and the reaction solution was poured into 4.51ml of water, and stirring was continued to allow crystallization. After stirring for about 2 hours, the apparatus was heated overnight. The crystals were filtered, washed repeatedly with water, and then dried. The obtained crystals were recrystallized from 1.5ρ ethanol. Yield 41.7
g (yield 74.0%).

Example 1 <Preparation of photosensitive material> A photosensitive material having the following composition was prepared using a homomixer under safe light.

・Silver bromide 0.7 parts, behenic acid 2.5 parts ・Silver behenate 4.5 parts ・Polyvinyl butyral 1000 parts ・2,2'-methylenebis(4-methyl-6t-butylphenol) 3.4 parts ・7 -Medoxyethyl-1.3-benzoxazinedione 0.7 parts・Toluene 60 parts・
70 parts of n-propertool The above photosensitive material was coated on a 6 μs polyethylene terephthalate film (PET film) to a dry film thickness of 5 cm.
A polyvinyl alcohol layer (PVA layer) was applied thereon to a dry film thickness of 2 Ijn to form photoreceptor A.

A mask film was placed on photoreceptor A, and imagewise exposed for 10 seconds to 1000 lux light (light source: tungsten lamp). The photoreceptor was then passed through a heat developing machine adjusted to 115° C. for 10 seconds. As a result, the exposed image area was thermally developed and an image was formed.

Maximum optical density (0, D, wax) = 1.75 and fog density (0, D, win) = 0.10 were obtained.

Comparative Example 1 Among the photosensitive materials prepared in Example 1, 7-
Medoxyethyl-1.3-benzoxazinedione 0.
Photoreceptor B was prepared using 1,3-benzoxazinedione part instead of 7 parts. When this was evaluated in the same manner as in Example 1, maximum optical density (0, D, wax) = 1.60 and fog density (0, 0, win) = 0.30 were obtained.

Compared to Example 1, the maximum optical density is lower and the fog density is higher, indicating that the toning agent used in the present invention is effective.

Example 2 An image forming medium 1 as shown in FIG. 1 was produced.

In Example 1, 2,6-di-t-butyl-4-(3,5-dimethyl -4-hydroxybenzyl)phenol (3.4 parts) was added, and 0.8 part of 7-nitoxyethyl-1,3-benzoxazinedione was added instead of 0.7 part of 7-medoxyethyl-1,3-benzoxazinedione as a color toner. A photosensitive material was prepared, and a photosensitive layer 411 was placed on a PET film 3 in the same manner as in Example 1, and a PVA layer 5 was formed thereon to produce a photoreceptor C (2 in the figure).

Separately, a dispersion liquid having the following composition was prepared in a dark room.

・Trimethylolpropane triacrylate) 10.0 parts (NKxXf A-TMPr, manufactured by Shin Nakamura Chemical)
・Ethyl 4-dimethylaminobenzoate 0.6 part (Ka
yacure EPA, manufactured by Nippon Kayaku)・2,4-diethylthioxanthone 0.4 part (Kayacure
DETX, manufactured by Nippon Kayaku)・Polymethyl methacrylate 10.0 parts・Methyl ethyl ketone 60
The above dispersion was applied to 6 pieces of PET film 7 to a dry film thickness of 5.
Jj11, a polymer layer 6 was provided, and the PVA layer 5 of the photoreceptor C was laminated so as to face the polymer layer 6, thereby producing an image forming medium 1.

A mask was placed on the image forming medium 1 produced as described above, and an ultra-high pressure mercury lamp with a power consumption of 500 W was used for 10 seconds at a distance of 60 cm from the medium through a cut filter that cuts light of 400 t+m or less. , image exposure was carried out from the PET film side of photoreceptor C. Thereafter, the mask was removed, and the entire surface was exposed from the photoconductor C side for 5 seconds from a distance of 60 cm from the medium using the ultra-high pressure mercury lamp described above with the cut filter removed. A polymer image was formed by this.

Next, the PVA layer and the photosensitive layer were peeled off, and the P that remained on the polymerized layer was removed.
When VA was removed by washing with water and the polymer layer was etched with ethanol, a polymer image remained on the PET film.

Example 3 In Example 2, 2,6-di-t-butyl-4-(3
, 5-dimethyl-4-hydroxybenzyl)phenol and 3.3 parts of 4,4'-methylenebis(2-methyl-1-naphthol) in place of 3.4 parts of 7-nitoxyethyl-1,3-benzoxazinedione. A photosensitive material was prepared using 0.7 part of 7-hydroxypropyl-1,3-benzoxazinedione instead of 0.8 parts, and a photoreceptor was fabricated. Furthermore, instead of 0.4 parts of 2,4-diethylthioxanthone in Example 2, 0.5 parts of bis(4-dimethylaminostyryl)ketone was added to the polymerization layer to form a layer facing the PVA layer of the photoreceptor. An image forming medium was prepared by laminating as described above. When processed in the same manner as in Example 2, a clear polymerized image could be obtained.

Example 4 In Example 2, 2,6-di-t-butyl-4-(3
, 5-dimethyl-4-hydroxybenzyl)phenol, 2,6-di-t-butyl-4-(
A photoreceptor E was prepared by adding 3.7 parts of 3-methyl-4-hydroxynaphthyl)methylphenol, and was laminated with a PET film provided with a polymer layer to obtain an image forming medium. When processed in the same manner as in Example 2, a clear polymerized image could be obtained.

Example 5 A photosensitive material was prepared using 0.8 parts of 7-nitoxyethoxy-1,3-benzoxazinedione in place of 0.8 parts of 7-nitoxyethyl-1,3-benzoxazinedione in Example 2. An image forming medium was obtained.

When processed in the same manner as in Example 2, a clear polymerized image could be obtained.

Comparative Example 2 In Example 2, a photosensitive material was prepared using 0.6 part of phthalazinedione instead of 0.8 part of 7-nitoxyethyl-1,3-benzoxazinedione, and photoreceptor F was obtained. This was subjected to image exposure and heating in the same manner as in Example 2.

The spectral characteristic curves of photoreceptor C and photoreceptor F in Example 2 are shown in FIG. 2, and the OD on the vertical axis shows the value at 400 nm+. From FIG. 2, it can be seen that γ of photoreceptor C is larger.

〔Effect of the invention〕

As explained above, general formula (I) used in the present invention
The color toning agent represented by can promote the redox reaction in a small amount and provide a stable photosensitive material. Therefore, by using the photosensitive material of the present invention, it is possible to obtain stable images with good contrast. It became.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view showing an example of an image forming medium using the photosensitive material of the present invention, and FIG. 2 is a graph showing spectral characteristic curves of photoreceptors C and F. 1... Image forming medium 2... Photoreceptor C 3, 7... PET film 4... Photosensitive layer 5... PVA layer 6... Polymer layer Patent applicant Oriental Photo Industry Co., Ltd. Canon Co., Ltd. company

Claims (1)

[Claims] 1. A photosensitive material containing at least an organic silver salt, a silver halide, a reducing agent, and a color toning agent, wherein the color toning agent includes the following general formula (I) ▲ mathematical formula, chemical formula, table, etc. ▼ (I) [However, in formula (I), R is an alkoxyalkyl group having 2 to 18 carbon atoms, an alkoxyalkyl group having 2 to 18 carbon atoms, a halogenoalkyl group having 1 to 18 carbon atoms, or a halogenoalkyl group having 1 to 18 carbon atoms.
~18 hydroxyalkyl group, or 1 to 18 carbon atoms
represents an aminoalkyl group. ] A photosensitive material characterized by using at least one compound represented by the following. 2. The reducing agent has the following general formulas (II), (III) and (IV)
2. The photosensitive material according to claim 1, wherein the photosensitive material is at least one compound represented by the following formula. ▲There are mathematical formulas, chemical formulas, tables, etc.▼ (II) [In general formula (II), R^1 and R^2 each independently represent a hydrogen atom, a hydroxyl group, a halogen atom, a substituted or unsubstituted alkyl group , a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aralkyl group, an alkoxyl group, a substituted or unsubstituted amino group, and m is Indicates an integer from 1 to 3, and A is a monovalent to trivalent group, including a substituted or unsubstituted aralkyl group, a substituted or unsubstituted alkyl group, a substituted amino group, a divalent alkylidene group, an aralkylidene group, a trivalent Indicates methine group. ] ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ (III) [In the general formula (III), R^5 represents a hydrogen atom, an alkyl group, a cycloalkyl group, an aralkyl group, and R^3
, R^4, and R^6 each independently represent a hydrogen atom, a halogen atom, an alkyl group, an amino group, an aryl group, an aralkyl group, an alkoxyl group, a nitro group, an acyl group, or a cyano group, and R^7 is hydrogen. Represents an atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, and a_
1 represents a hydrogen atom, a hydroxyl group, a halogen atom, a substituted or unsubstituted alkyl group, a cycloalkyl group, an alkoxyl group, or a substituted or unsubstituted amino group. [In the general formula (IV), R^8, R^9, R^1^0 and R^1^1 each independently represent a hydrogen atom, halogen atom,
Represents a substituted or unsubstituted alkyl group, cycloalkyl group, alkoxyl group, substituted or unsubstituted aralkyl group, substituted or unsubstituted aryl group, substituted or unsubstituted amino group, nitro group, or acyl group, and Z is 2 Valence group, a_2
and a_3 is a hydrogen atom, a hydroxyl group, a halogen atom, a substituted or unsubstituted alkyl group, an alkoxyl group,
represents a substituted or unsubstituted amino group, and at least a_
Either 2 or a_3 is a hydroxyl group. ]