JPS61210350A - Heat developable color photosensitive material - Google Patents

Abstract

PURPOSE:To obtain a color image having high image density and little fog by using a heat developable color photosensitive material having essentially photosensitive silver halide, a binder, a reducing agent and a specified dye providing substance on the support. CONSTITUTION:A heat developable color photosensitive material having essen tially photosensitive silver halide, a binder, a reducing agent and a dye providing substance represented by formula 1 on the support is used, In the formula, X is O or S; Y is a group of atoms required to form a benzene or naphthalene ring; J is a bivalent combining group; D is a residue of a diffusible dye; and n=0 or 1.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a heat-developable color photosensitive material that forms a color image by transferring a diffusible dye formed by a heat source image, and particularly relates to a heat-developable color photosensitive material that forms a color image by transferring a diffusible dye formed by a heat source image. The present invention relates to a heat-developable color photosensitive material containing a novel dye-providing substance that reacts with an oxidant to release a diffusible dye.

[Prior art] The conventionally known photographic method using photosensitive silver halide is superior to other photographic methods in terms of photosensitivity, gradation, image preservation, etc., and has been the most widely put into practical use. It is a photographic method.

However, since this method uses wet processing for processing steps such as development, fixing, and water washing, processing is time-consuming and labor-intensive, and there are concerns that the processing chemicals may affect the human body, or the processing room and work area may be affected. There are many problems, such as concerns about contamination of people by the chemicals mentioned above, and consideration of pollution caused by waste liquid. Therefore, it has been desired to develop a photosensitive material that uses photosensitive silver halide and can be dry processed.

Many proposals have been made regarding the above-mentioned dry processing photographic method, and among them, heat-developable photosensitive materials in which the developing step can be carried out by heat treatment are attracting attention as photosensitive materials that meet the above-mentioned requirements.

Regarding such heat-developable photosensitive materials, for example,
This is described in Japanese Patent No. 4921 and No. 43-4924, and discloses a photosensitive material comprising an organic silver salt, silver halide, and a reducing agent.

Attempts have been made to improve such heat-developable photosensitive materials and obtain color images by various methods.

For example, U.S. Patent Nos. 3,531,286 and 3,7
No. 61,270 and No. 3,764,328 disclose heat-developable color photosensitive materials in which a color image is formed by a reaction between an oxidized aromatic primary amine developing agent and a coupler. ing.

Further, Research Disclosure No. 15108 and No. 15127 disclose a heat-developable color photosensitive material in which a color image is formed by the reaction of an oxidized form of a sulfonamide phenol or a sulfonamide aniline ffls embodying agent with a coupler. There is. However, these methods have the problem that a reduced silver image and a color image are simultaneously generated in the exposed area after thermal development, resulting in the color image becoming cloudy. In addition, as a way to solve this problem,
Either the silver image is removed by liquid processing, or only the pigment is added to other layers.
For example, there is a method of transferring to an image-receiving sheet having an image-receiving layer, but it has the problem that it is not easy to distinguish between unreacted substances and the dye and transfer only the dye.

In addition, Research Disclosure No. 16968 describes heat development in which an organic imino silver salt having a dye part is used, the imino group is liberated in the exposed part by heat development, and a color image is formed on the image-receiving layer as a transfer paper using a solvent. A color photosensitive material is disclosed. However, this method has the problem that it is difficult to suppress the release of dyes in areas not exposed to light, and it is not possible to obtain clear color images.

Also, JP-A-52-1058214, JP-A-5210582
No. 2, Publication No. 56-50328, U.S. Patent No. 4,2
Specification No. 35,957, Research Disclosure No. 14448, Research Disclosure No. 15227 and Research Disclosure No. 18137
A heat-developable color photosensitive material is disclosed in which a positive color image is formed by a heat-sensitive saw dye bleaching method. but,
This method requires extra steps and photographic construction materials, such as heating overlapping sheets containing activators to speed up bleaching of the dyes, and the resulting color images do not fade during long-term storage. It has the problem of being gradually reduced and bleached by coexisting free silver and the like.

Also, U.S. Patent Nos. 3,180,732 and 3,98
No. 5,565 and No. 4,022,617, as well as Research Disclosure No. 12533, disclose thermal color photosensitive materials that utilize leuco dyes to form color images. However, this method has the problem that it is difficult to stably incorporate the leuco dye into the photographic material, and the material gradually becomes colored during storage.

Furthermore, JP-A-L57-179840 discloses a heat-developable color photosensitive material in which a color image is formed using a dye-releasing aid and a reducing dye-providing substance that releases a diffusible dye. However, in this method, it is essential to use a dye release aid, and this dye release aid is a so-called base or a precursor of a base. As described above, the technique using a base or a base precursor has the problem that in a heat-developable photosensitive material using an organic silver salt oxidizing agent, the presence of the base increases fog and lowers the maximum density.

In order to improve the drawbacks of the above-mentioned heat-developable photosensitive materials, JP-A-57-186744, JP-A-57-20725, JP-A-59-12431, JP-A-59-48765, and JP-A-59 are disclosed.
-116642, 59-116643, 59-
Publications such as No. 174834 disclose heat-developable color photosensitive materials in which a transferred image is obtained using a dye-providing substance that reacts with an oxidized reducing agent to release a diffusible dye. However, the dye-donating substances described in these publications have a low reaction (coupling reaction) with the oxidized form of the reducing agent under the conditions of thermal development, and therefore have a sufficient maximum concentration (DWaX
), or a transfer image with fog (
DIIla has the disadvantage of high Qmin).
A dye-releasing dye-donor substance capable of providing images with sufficient performance in both x and [l min has not yet been obtained.

CObject of the invention The object of the present invention is to solve the problems of the above-mentioned conventional dye-providing substances. The purpose of the present invention is to provide a heat-developable color photosensitive material.

A second object of the present invention is to provide a heat-developable color photosensitive material that can provide color images with high image density and less fog.

[Constitution of the Invention] As a result of intensive research to achieve the above object, the present inventors have found that at least a photosensitive silver halide, a binder,
It has been found that the above objects of the present invention can be achieved by a heat-developable color photosensitive material having a reducing agent and a dye-providing substance represented by the following general formula (1).

General formula (1) In the formula, X represents an oxygen atom or a sulfur atom, Y represents a collection of atoms necessary to form a benzene ring or a naphthalene ring, J represents a divalent bonding group, and D represents a divalent bonding group. It represents the residue of a diffusible dye, and 0 represents 0 or 1.

[Specific Structure of the Invention] In the general formula (1), Y is a collection of atoms necessary to form a benzene ring or a naphthalene ring H, and naphthalene has a substituent on the ring. Also good. Preferred substituents include halogen atoms (e.g. chlorine atom, bromine atom), alkyl groups (e.g. methyl group, ethyl group, isopropyl group), cycloalkyl groups (e.g. cyclohexyl group), aryl groups (e.g. phenyl group), Acyl group (e.g. acetyl group), alkyloxycarbonyl group (e.g. methyloxycarbonyl group), aryloxycarbonyl group (e.g. phenyloxycarbonyl group), alkylsulfonyl group (e.g. methylsulfonyl group), arylsulfonyl group (e.g. phenylsulfonyl group) ), carbamoyl group, sulfamoyl group, acyloxy group (e.g. acetyloxy group), amino group, alkoxy group (e.g. methoxy group, ethoxy group), aryloxy group (e.g. methylcarbonyloxy group), cyano group,
ureido group, alkylthio group (e.g. methylthio group),
Arylthio J! (e.g., phenylthio group), carboxy group, sulfo group, or heterocyclic residue (e.g., pyridyl group), and these substituents may further include hydroxyl group, carboxy group, sulfo group, alkoxy group (e.g., methoxy group)
, cyan group, nitro group, alkyl group (e.g. methyl group,
Ethyl group, aryl group (e.g. phenyl group), aryloxy group (e.g. phenyloxy group), acyloxy group (e.g. acetyloxy group), acyl group (e.g. acetyl group, isopropylcarbonyl group), sulfamoyl group, carbamoyl group, imide It may be substituted with a group, a halogen atom (for example, a chlorine atom, a bromine atom), or the like. still,
Two or more substituents may have the same or different substituents.

Furthermore, at least one of the above substituents has the general formula (
In order to make the dye-providing substance represented by 1) non-diffusible, it is preferably a ballast group or a group substituted with a ballast group.

The ballast group of the present invention is an organic group having 8 or more carbon atoms (more preferably 12 or more), or a hydrophilic group such as a sulfo group or a carboxy group, or a hydrophilic group having 8 or more carbon atoms (more preferably 12 or more). Examples include groups having both a carbon atom and a hydrophilic group such as a sulfo group or a carboxy group. Another particularly preferred ballast group can include polymer chains.

In the general formula (1), the divalent bonding group represented by J is preferably a group represented by the following general formula.

General formula (2) General formula (3) R,L General formula (4) General formula (5) -Nl-ICO
SoR,+ -CONH+R,-+,-General formula (6)
General formula (7) -N+coN+-GR,→,
-N)-1802(R, cotton [general formula (8)
General formula (9) -NH802Nl-1 R→--S R, -+, -l General formula (10) General formula (11) General formula (12) General formula (13) R7 In the formula, R1 is It represents an alkylene group, an arylene group, or a divalent group formed by combining an alkylene group and an arylene group (for example, an aralkylene group), and R1 may have a substituent. R2 represents a hydrogen atom or an alkyl group, and represents an integer of m-0, 1 or 2.

In the general formula (1), the residue of the diffusible dye represented by D has a molecular weight of 80 due to the diffusivity of the dye.
It is preferably 0 or less, more preferably 600 or less, and azo dyes, azomethine dyes, anthraquinone dyes,
Examples include residues such as naphthoquinone dyes, styryl dyes, nitro dyes, quinoline dyes, carbonyl dyes, and phthalocyanine dyes.

These dye residues may be in a temporary short-waveform form that allows multiple colors during thermal development or transfer. In addition, these dye residues are used for the purpose of increasing the light resistance of images, for example, in
Chelatable dye residues described in No. 48785 and No. 59-124337 are also preferred.

Typical specific examples of the dye-providing substance represented by the general formula (1) of the present invention are shown below, but the present invention is not limited thereto.

(1) (: [C00H OCout OCHCOOH The dye-providing substance of the present invention is synthesized, for example, as follows.

Synthesis Example Synthesis of Exemplary Dye-Providing Substance (10) ■ Intermediate (A
) Synthesis of 2-amino-4,6-dichloro-5-methylphenol hydrochloride 140 (7 was dissolved in a mixed solution of 800 Ill,!! of acetonitrile and 200 mλ of pyridine, and n-
A solution of nitrobenzoic acid chloride (167a) in acetonitrile (200+ml) was added dropwise and refluxed for 2 hours.

This reaction solution was concentrated to 300 Q, and water containing 75 Q of sodium hydroxide <good> and ethanol <40
omJ> was added, stirred at room temperature for 1 hour, neutralized with hydrochloric acid, and the precipitated solid was filtered off to obtain 157 g of 2-(II-nitrobenzoylamino)-4,6-dichloro-5-methylphenol. .

Using this phenol derivative 136.4111, 2 -Methyl-3-chloro-
73 g of 4-benzyloxy-5-(m-nitrobenzoyl)aminephenol was obtained.

39.7 g of this phenol derivative and α-promo γ-(
Intermediate (A) 43a was obtained by reacting 35.1 (l) of ethyl 1)-sulfo)phenylbutyrate in the same manner as described on page 23 of Japanese Patent Application No. 59-35238.

Intermediate (A) ■Synthesis of monomer Intermediate (A) (2B, 7!If') is reacted with methacryl chloride by a conventional method, and then both the carboxy group and the sulfo group are changed to acid chloride with thionyl chloride, Hydrolyzed only carbonyl chloride in ice water and recrystallized with acetonitrile to form p-[γ
-carboxyγ-(2-methyl-3-chloro-4-hydroxy-3-(In-methacryloylamino)benzoylamino)phenyloxypropylbenzenesulfonylchloride 1-''24,813 was obtained.Subsequently, this 24.89 g of acid chloride and 11.7 g of 2-(m-amino)phenylazo-4-methoxy-1-naphthol were reacted to obtain 25 g of monomer.

■Synthesis of Exemplary Dye-Providing Substance (10) 12 g of the above monomer and 8 g of n-butyl acrylate were dissolved in 1 sod of dioxane, heated to 80-82°C while introducing nitrogen gas, and heated to 80-82°C while maintaining this temperature for 2 hours.
．． 2'-Azobisisobutyronitrile 60 (le, 3
was added and reacted for 4 hours. The reaction solution was diluted with 1 J of water, and the precipitate was filtered off. The precipitate was dissolved in 2001 J of ethyl acetate, dried over magnesium sulfate, and then filtered. The filtrate was concentrated and dried to obtain the target product 18a.

The dye-providing substances of the present invention may be used alone or in combination of two or more. The amount used is not limited and depends on the type of dye-providing substance, whether it is for military use or a combination of two or more types, and whether the photographic constituent layer of the light-sensitive material of the present invention is a single layer or a multilayer of two or more layers. For example, the usage amount can be determined based on 1. ) 0.005 g to 50 g, preferably 1 g to 10 g Oy, can be used.

The dye-providing substance used in the present invention can be incorporated into the photographic constituent layer of the heat-developable color light-sensitive material using any method. After dissolving in tricresyl phosphate, etc.),
Ultrasonic dispersion or alkaline aqueous solution (e.g.
Dissolve in a 10% aqueous solution of sodium hydroxide, etc.) and then neutralize with a mineral acid (e.g., hydrochloric acid or nitric acid, etc.).
or an aqueous solution of a suitable polymer (e.g. gelatin,
It can be used after being dispersed together with polyvinyl butyral, polyvinyl and lolidone, etc.) using a ball mill.

The heat-developable color photosensitive material of the present invention contains photosensitive silver halide together with the dye-providing substance.

The photosensitive silver halide used in the present invention includes silver chloride, silver bromide, silver iodide, silver chlorobromide, silver chloroiodide, silver iodobromide,
Examples include silver chloroiodobromide. The photosensitive silver halide is
Although it can be prepared by any method in the photographic field such as a single jet method or a double jet method, in the present invention, a photosensitive silver halide gelatin emulsion prepared according to a conventional method for preparing a silver halide gelatin emulsion is used. A light-sensitive silver halide emulsion containing 0.05 to 1.5 g gives favorable results.

The light-sensitive silver halide emulsion may be chemically sensitized by any method known in the photographic art. Such sensitization methods include
Various methods include gold sensitization, sulfur sensitization, gold-sulfur sensitization, and reduction sensitization.

The silver halide in the above-mentioned photosensitive emulsion may be coarse or fine, but the preferred grain size is about 0.001 μm to about 1.5 μm, more preferably about 0.001 μm to about 1.5 μm, and more preferably about 0.001 μm to about 1.5 μm. .01 μm to about 0.5 μm.

The photosensitive silver halide emulsion prepared as described above can most preferably be applied to the heat-developable photosensitive layer which is a constituent layer of the photosensitive material of the present invention.

In the present invention, as another method for preparing photosensitive silver halide, a photosensitive silver salt-forming component may be allowed to coexist with the organic silver salt to be incorporated, and photosensitive silver halide may be formed in a part of the organic silver salt. can. The photosensitive silver salt-forming components used in this preparation method include inorganic halides, for example, halides represented by MXn (where M represents an H atom, an NH4 group, or a metal atom, and X is C), Br or I, and n is 1 when M is an H atom, NHt, or a group; when M is a metal atom, n is the atomic symbol. Metal atoms include lithium, sodium, potassium, rubidium, cesium, copper, gold, beryllium, magnesium, calcium, strontium, barium, zinc, cadmium, mercury, aluminum, indium, lanthanum, ruthenium, thallium, germanium, tin, and lead. , antimony, bismuth, chromium, molybdenum, tungsten, manganese, rhenium,
Examples include iron, cobalt, nickel, rhodium, palladium, osmium, iridium, platinum, and cerium.

), halogen-containing metal complexes (e.g., 2pt cffl
,,, K,, Pt Br6, HAu c44
゜(NH4)I Ir CJ, (,, (NH4>3
rr CJ,.

(NH4)Z Ru cJ, , (NH4>3 R
u CJl'4゜(NH) RhCl , (NH,
), 3 RhBr.

36 etc.), onium halides (e.g., quaternary ammonium halides such as tetramethylammonium bromide, trimethylphenylammonium bromide, cetylethyldimethylammonium bromide, 3-methylthiazolium bromide, trimethylbenzylammonium bromide, tetraethylphosphonium) 4F & phosphonium halides such as bromide, benzylethylmethylsulfonium bromide, tertiary sulfonium halides such as 1-ethylthiazolium bromide, etc.), halogenated hydrocarbons (e.g. iodoform, bromoform, carbon tetrabromide, 2 -bromo-2-methylpropane, etc.), N-silver halide emulsions (N-chlorosuccinimide, N-bromosuccinimide, N-bromophthalimide, N-bromoacetamide, N-iodosuccinimide, N-bromophthalimide) Radinone, N-chlorophthalazinone, N-bromoacetanilide, N,N-dibromobenzenesulfonamide, N-bromo-N-methylbenzenesulfonamide, 1,3-dibromo-4,4-dimethylhydantoin, etc.), and others Halogen-containing compounds such as triphenylmethyl chloride, triphenylmethyl bromide,
2-bromobutyric acid, 2-bromoethanol, etc.).

These photosensitive silver halides and photosensitive silver salt-forming components can be used in combination in various methods, and the amount used is preferably 0.0O1Q to 50g per layer, more preferably, o, 10-10
It is g.

The heat-developable color photosensitive material of the present invention has a multilayer structure including each layer sensitive to blue light, green light, and red light, that is, a heat-developable blue-sensitive layer, a heat-developable green-sensitive layer, and a heat-developable red-sensitive layer. You can also. Further, the same color photosensitive layer can be divided into 2H or more (for example, a high-sensitivity layer and a low-sensitivity layer).

In the above case, the blue-sensitive silver halide emulsion, green-sensitive silver halide emulsion, and red-sensitive silver halide emulsion used, respectively, can be obtained by adding various spectral sensitizing dyes to the silver halide emulsion. I can do it.

Typical spectral sensitizing dyes used in the present invention include, for example, cyanine, merocyanine, complex (trinuclear or tetranuclear) cyanine, holopolar cyanine, styryl, hemicyanine, oxonol, and the like. Among the cyanine dyes, those having a basic nucleus such as thiazoline, oxazoline, viroline, pyridine, oxazole, thiazole, selenazole, and imidazole are more preferred. Such nuclei include alkyl groups, alkylene groups,
It may contain a hydroxyalkyl group, a sulfoalkyl group, a carboxyalkyl group, an aminoalkyl group or an enamine group capable of forming a fused carbocyclic or heterocyclic ring. Further, it may be symmetrical or asymmetrical, and the methine chain or polymethine chain may have an alkyl group, a phenyl group, an enamine group, or a heterocyclic substituent.

In addition to the above basic nucleus, the merocyanine dye may have an acidic nucleus such as a thiohydantoin nucleus, logenine nucleus, oxazoturic acid solution, thiazolinthione nucleus, malonitrile nucleus, or pyrazolone nucleus. These acidic nuclei further include alkyl groups, alkylene groups, phenyl groups, carboxyalkyl groups, sulfoalkyl groups, hydroxyalkyl groups,
It may be substituted with an alkoxyalkyl group, an alkylamine group or a heterocyclic nucleus. If necessary, these dyes may be used in combination. Furthermore, ascorbic acid derivatives, azaindene cadmium salts, organic sulfonic acids, etc.
For example, U.S. Patent Nos. 2,933,390 and 2,93
A supersensitizing additive that does not absorb visible light, such as those described in the specification of No. 7,089, can be used in combination.

The amount of these dyes added is from 10' mole to 1 mole of I x per mole of silver halide or silver halide forming component. More preferably, it is 1×10” mole to 1×10′ mole.

In the heat-developable color photosensitive material of the present invention, various organic silver salts can be used, if necessary, for the purpose of increasing sensitivity and improving developability.

Examples of organic silver salts used in the heat-developable color photosensitive material of the present invention include Japanese Patent Publication Nos. 43-4921 and 44-26582.
No. 45-18416, No. 45-12700, No. 45-22185, JP-A-49-52626, No. 5
No. 2-31728, No. 52-137321, No. 52-
No. 141222, No. 53-36224 and No. 53-
Publications such as No. 37610 and U.S. Patent No. 3,330
, No. 633, No. 3,794,496, No. 4,10
No. 5,451, No. 4.123,274, No. 4.1
Silver salts of aliphatic carboxylic acids such as silver laurate, silver myristate, silver valmitate, silver stearate, silver arachidonate, silver behenate, as described in the specifications of No. 68,980, etc. Silver aromatic carboxylates such as α-(1-phenyltetrazolethio)silver acetate, such as silver benzoate, silver phthalate, etc., Japanese Patent Publications No. 44-26582, No. 45-12700, No. 45-18416, Same 45-
No. 22185, JP-A-52-31728, JP-A No. 52-1
No. 37321, JP-A-58-118638, JP-A No. 58-118-
Silver salts of imino groups as described in publications such as No. 118639, such as silver benzotriazole, silver 5-nitrobenzotriazole, silver 5-chlorobenzotriazole, silver 5-methoxybenzotriazole, and silver 4-sulfobenzotriazole. Silver, 4-hydroxybenzotriazole silver, 5-aminobenzotriazole silver, 5-carboxybenzotriazole silver, imidazole silver, benzimidazole silver, 6-nidropenzimidazole silver, pyrazole silver, urazole silver, 1,2.4- triazole silver,
1 day - silver tetrazole, silver 3-amino-5-benzylthio-1,2,4-triazole, silver saccharin, silver phthalazinone, silver phthalimide, etc., silver 2-mercaptobenzoxazole, silver mercaptooxadiazole, 2-mercapto Silver benzothiazole, 2-mercaptobenzimidazole silver, 3-mercapto-4-phenyl-1,2,4-triazole silver, 4-hydroxy-6-
Examples include methyl-1,3,38,7-titrazaindene silver and 5-methyl-7-hydroxy-1,2,3,4,6-pentazaindene silver. Among the above organic silver salts, imino group silver salts are preferred, and silver salts of benzotriazole derivatives are particularly preferred, and silver salts of sulfobenzotriazole derivatives are particularly preferred.

The organic silver salts used in the present invention may be used alone or in combination of two or more, and isolated ones may be used by dispersing them in a binder by appropriate means, or they may be used in a suitable form. The silver salt may be prepared in a binder and used as is without isolation.

The amount of the silver salt used is preferably 0.01 to 500 mol, more preferably 0.1 to 100 mol, per 1 mol of photosensitive silver halide.

The reducing agent used in the heat-developable color photosensitive material of the present invention is
Those commonly used in the field of heat-developable color photosensitive materials can be used; for example, those disclosed in U.S. Pat. No. 3,531,286
No. 3,761,270, No. 3,764.32
No. 8 specifications, and R D No. 12146,
Same No.

15108, No. 15127 and JP-A-56-2
Examples include p-phenylenediamine-based and p-aminophenol-based developing agents, phosphoramidophenol-based and sulfonamidophenol-based developing agents, and hydrazone-based color developing agents described in Japanese Patent No. 7132 and the like.

Also, U.S. Patent Nos. 3,342,599 and 3,71
No. 9,492, JP-A-53-135628, JP-A No. 54-
Color developing agent precursors described in No. 79035 and the like can also be advantageously used.

As a particularly preferable reducing agent, JP-A-56-146133
Examples include reducing agents represented by the following general formula (14) described in No.

General formula (14) In the formula, R3 and R4 represent a hydrogen atom or an alkyl group having 1 to 30 carbon atoms (preferably 1 to 4) which may have a substituent, and R3 and R4 are ring-closed. may be used to form a heterocycle. R,! -, R, <Rrt and Rg each have a hydrogen atom, a halogen atom, a hydroxy group, an amino group, an alkoxy group, an acylamido group, a sulfonamide group, an alkylsulfonamide group, or a carbon atom number of 1 to 30 which may have a substituent. represents an alkyl group (preferably 1 to 4), and R5- and R3 and R/7 and R4 may each be closed to form a heterocycle. M is an alkali metal atom,
Represents a compound containing an ammonium group, a nitrogen-containing organic base, or a quaternary nitrogen atom.

The nitrogen-containing organic base in the general formula (14) is an organic compound containing a basic nitrogen atom capable of forming a salt with an inorganic acid, and particularly important organic bases include amine compounds. Examples of chain amine compounds include primary amines, secondary amines, and tertiary amines, and examples of cyclic amine compounds include pyridine, quinoline, and piperidine, which are well-known examples of typical heterocyclic organic bases. , imidazole and the like. In addition, hydroxylamine,
Compounds such as hydrazine and amidine are also useful as chain amines. As the salt of the nitrogen-containing organic base, the above-mentioned Il-free salts of organic bases (eg, salts, sulfates, nitrates, etc.) are preferably used.

On the other hand, examples of the compound containing quaternary nitrogen in the above general formula include salts or hydroxides of nitrogen compounds having a tetravalent covalent bond.

, below in the margin Next, preferred specific examples of the reducing agent represented by the general formula (1) are shown below.

(R-1) (R-2) (R-3) (R-4) (R-5) (R-7) (R-8) t (R-9) H3 (R-10) (R- 11) (R-12J (R-15) (R-16) (R-17) (R-18) (R-19) (R-20) (R-21) (R-22) (R-23 ) The reducing agent represented by the above general formula (14) can be prepared by a known method, for example, Houben-Weyl, Method
ender Qrganischen Chemie
, Band X I/2, pp. 645-703.

Other reducing agents as described below can also be used.

For example, phenols (e.g. p-phenylphenol, p-methoxyphenol, 2,6-tert-
butyl-p-cresol, N-methyl-〇-aminophenol, etc.), sulfonamidophenols [e.g. 4-
Benzenesulfonamidophenol, 2-benzenesulfonamidophenol, 2,6-dichloro-4-benzenesulfonamidophenol, 2,6-dipromo-4-
(p-toluenesulfonamido)phenol, etc.], or polyhydroxybenzene WA (e.g., hydroquinone, tert-butylhydroquinone, 2,6-dimethylhydroquinone, chlorohydroquinone, carboxyhydroquinone, catechol, 3-carboxylic acidol, etc.), Naphthols (e.g. α-naphthol, β-naphthol, 4-aminonaphthol, 4-methoxynaphthol, etc.), hydroxybinaphthyls and methylene naphthols such as 1,1'-dihydroxy-2,2
'-binaphthyl, 6,6'-dibromo-2,2'-dihydroxy-1,1'-binaphthyl, 6,6-sinitro2,2'-dihydroxy-1,1'-binaphthyl, 4
．． 4'-dimethoxy-1,11-dihydroxy-2,2
'-binaphthyl, bis(2-hydroxy-1-naphthyl)methane, etc.], methylene bisphenols, etc.
1-bis(2-hydroxy-3,5-dimethylphenyl)-3°5.5-)-limethylhexane, 1,1-bis(2-hydroxy-3-tert-butyl-5-methylphenyl)methane , 1.1-bis(2-hydroxy-3
,5-di-tert-butylphenyl)methane, 2.6
-methylenebis(2-hydroxy-5-tert-butyl-5-methylphenyl)-4-methylphenol, α
-phenyl-α,α-bis(2-hydroxy-3,5-
di-tert-butylphenyl)methane, α-phenyl-α, α-bis(2-hydroxy-3-tert-butyl-5-methylphenyl)methane, 1,1-bis(2-
Hydroxy=3.5-dimethylphenyl)-2-methylpropane, 1.1.5.5-tetrakis(2-hydroxy-3,5-dimethylphenyl)-2,4-ethylpentane, 2.2-bis( 4-Hydroxy-3゜5-dimethylphenyl)propane, 2,2-bis(4-hydroxy-3-methyl-5-tert-butylphenyl)propane, 2,2-bis(4-humanOxy3.5 -Gee
rt-butylphenyl)propane, etc.], ascorbic acids, 3-pyrazolidones, pyrazolones, hydrazones, and paraphenylenediamines.

These reducing agents can be used alone or in combination of two or more. The amount of reducing agent used depends on the type of photosensitive silver halide used, the type of organic acid silver salt, and the type of other additives, but it is usually 0 per mol of photosensitive silver halide. in the range of .01 to 1500 mol,
Preferably it is 0.1 to 200 mol.

Binders used in the heat-developable color photosensitive material of the present invention include synthetic or natural binders such as polyvinyl butyral, polyvinyl acetate, ethyl cellulose, polymethyl methacrylate, cellulose acetate butyrate, polyvinyl alcohol, polyvinyl pyrrolidone, gelatin, and phthalated gelatin. One or a combination of two or more polymeric substances can be used. In particular, it is preferable to use gelatin or a derivative thereof in combination with a hydrophilic polymer such as polyvinylpyrrolidone or polyvinyl alcohol, and more preferably the following binder described in Japanese Patent Application No. 104249/1982.

This binder includes gelatin and vinyl and lolidone polymers. The vinyl pyrrolidone polymer may be polyvinyl pyrrolidone, which is a homopolymer of vinyl pyrrolidone, or a copolymer of vinyl pyrrolidone and one or more other monomers copolymerizable (including kraft copolymers). ). These polymers can be used regardless of their degree of polymerization. Polyvinylpyrrolidone may be substituted polyvinyl and lolidone, and preferred polyvinylpyrrolidone has a molecular weight of 1,000 to 4.
00,000. Other monomers copolymerizable with vinylpyrrolidone include (meth)acrylic acid esters such as acrylic acid, methacrylic acid and alkyl esters thereof, vinyl alcohols, vinyl imidazoles, (meth)acrylamides, and vinyl carbinols. , vinyl alkyl ethers, and the like, but it is preferable that polyvinylpyrrolidone accounts for at least 20% (weight %, same hereinafter) of the composition ratio. Preferred examples of such copolymers have molecular weights of s, oo
o ~ 400,000.

The gelatin may be lime-treated or acid-treated, and may be ossein gelatin, big skin gelatin, hydrogelatin, or modified gelatin obtained by esterifying or phenylcarbamoylating these gelatins.

In the above binder, gelatin preferably accounts for 10 to 90% of the total binder amount, more preferably 20 to 60%, and vinylpyrrolidone accounts for 5 to 90%.
It is preferably 10 to 80%, more preferably 10 to 80%.

The binder may contain other polymeric substances,
Gelatin and a mixture of polyvinylpyrrolidone with a molecular weight of 1,000 to 400,000 and one or more other polymeric substances, gelatin and a molecular weight of s, ooo to 400.00
A mixture of 0 vinylpyrrolidone copolymer and one or more other polymeric substances is preferred. Other polymeric substances used include polyvinyl alcohol, polyacrylamide, polymethacrylamide, polyvinyl butyral,
Examples include polyethylene glycol, polyethylene glycol ester, or proteins such as cellulose derivatives, and natural substances such as polysaccharides such as starch and gum arabic. These are 0-85%, preferably 0-70%
May be included.

Note that the vinyl pyrrolidone polymer may be a crosslinked polymer, but in this case, it is preferable to crosslink it after coating it on the support (including the case where the crosslinking reaction progresses by leaving it to stand).

The amount of binder used is usually 0,0517 to 50 g per 1 ml per layer, preferably 0.1 g to 1 ml.
It is 0g. Further, the binder is preferably used in an amount of 0.1 to 10 g, more preferably 0.25 to 4 g, per 1 g of one unit of the dye-providing substance monomer.

Supports used in the heat-developable color photosensitive material of the present invention include, for example, polyethylene film, cellulose acetate film, polyethylene terephthalate film, synthetic plastic films such as polyvinyl chloride, photographic base paper, printing paper, baryta paper, and resin coating. Examples include a paper support such as paper, a support formed by providing a reflective layer on the above-mentioned synthetic plastic film, and the like.

In particular, it is preferable that various heat solvents be added to the heat-developable color photosensitive material of the present invention. The thermal solvent of the present invention may be any substance that promotes thermal development and/or thermal transfer, and is preferably solid, semi-solid, or liquid at room temperature (preferably with a boiling point of 100°C or higher at normal pressure, more preferably 15°C).
0°C or higher) and dissolves or melts in the binder by heating, preferably urea derivatives (e.g., dimethylurea, diethylurea, phenylurea, etc.), amide derivatives (e.g., acetamide,
benzamide, etc.), polyhydric alcohols (e.g. 1.5
-bentanediol, 1,6-bentanediol, 1,
2-cyclohexanediol, pentaerythritol,
trimethylolethane, etc.), or polyethylene glycols. For a detailed example, see the patent application of 1983.
-104249. These thermal solvents may be used alone or in combination of two or more.

In addition to the above-mentioned components, various additives may be added to the heat-developable color photosensitive material of the present invention, if necessary. For example, as a development accelerator, U.S. Pat.
No. 4,060,420, No. 4,088,49
6, 4,207,392 specifications, RD N
o, 15733, same N0115734, same N 0.15
776, JP-A-56-130745, JP-A No. 5B-132
Alkali release agents such as urea and guanidium trichloroacetate described in No. 332, etc., Japanese Patent Publication No. 1270-1970
Organic acids described in No. 0, non-aqueous polar solvent compounds having -co-, -so, --, -5o- groups described in U.S. Pat. No. 3,667.959, and non-aqueous polar solvent compounds described in U.S. Pat. No. 3,438,776. Melt Former-1 U.S. Patent No. 3,686,47
No. 7, and polyalkylene glycols described in JP-A-51-19525. In addition, as a color toning agent, for example, JP-A-46-4928, JP-A-46-6077, JP-A-49
-5019, 49-5020, 49-9121
No. 5, No. 49-107727, No. 50-2524, No. 50-67132, No. 50-67641, No. 5
No. 0-114217, No. 52-33722, No. 52-
No. 99813, No. 53-1020, No. 53-551
No. 15, No. 53-76020, No. 53-12501
No. 4, No. 54-156523, No. 54-15652
No. 4, No. 54-156525, No. 54-1565
Publications such as No. 26, No. 55-4060, No. 55-4061, No. 55-32.015, and West German Patent No. 2,
No. 140,406, No. 2,147.063, No. 2,
No. 220,618, U.S. Patent No. 3,080,254;
No. 3,847,612, No. 3,782,941, No. 3,994,732, No. 4,123,282
Phthalazinone, phthalimide, pyrazolone, quinazolinone, N-hydroxynaphthalimide, benzoxazine, naphthoxazinedione, 2゜3
-dihydro-phthalazinedione, 2,3-dihydro-1
, 3-oxazine-2,4-dione, oxypyridine,
Aminopyridine, hydroxyquinoline, aminoquinoline, isocarbostyryl, sulfonamide, 2H-1,3
-benzothiazine-2,4-(3H) dione, benzotriazine, mercaptotriazolene, phthalic acid, naphthalic acid, phthalamic acid, etc., mixtures of one or more of these with imidazole compounds, and phthalic acid , a mixture of at least one acid or acid anhydride such as naphthalic acid or an acid anhydride and a phthalazine compound, and combinations of phthalazine and maleic acid, itaconic acid, quinolinic acid, gentisic acid, etc.

Also, JP-A-58-189628, JP-A No. 58-1934
3-amino-5-mercapto-1 described in JP60.

2,4-triazoles and 3-acylamino-5-mercapto-1.2.4-triazoles are also effective.

Furthermore, as an antifoggant, for example,
No. 7-11113, JP-A-49-90118, JP-A No. 49
-10724, 49-97613, 50-1
No. 01019, No. 49-130720, No. 50-1
No. 23331, No. 51-47419, No. 51-574
No. 35, No. 51-78227, No. 51-10433
No. 8, No. 53-19825, No. 53-20923,
No. 51-50725, No. 51-3223, No. 51
-42529, 51-81124, 54-51
Publications such as No. 821 and No. 55-93149, as well as British Patent No. 1,455,271 and U.S. Patent No. 3,885.
, No. 968, No. 3, 700,457, No. 4, 13
7,079 Hakama, German Patent No. 4.138,265, West German Patent No. 2,617,907, etc., or oxidizing agents (for example, N-halogen acetamide, N-halogenosuccinimide, perchloric acid and its salts, inorganic peroxides, persulfates, etc.),
Alternatively, acids and salts thereof (for example, sulfinic acid, lithium laurate, rosin, diterpene acid, thiosulfonic acid, etc.), or sulfur-containing compounds (for example, mercapto compound-releasing compounds, thiouracil, disulfide, simple sulfur, mercapto-1. 2.4-triazole, thiazolinthione, polysulfide compound, etc.), others,
Oxazoline, 1.2.

Examples include compounds such as 4-triazole and phthalimide. Furthermore, as another antifoggant, JP-A-59-111
Thiol (preferably thiophenol compounds) compounds described in No. 636 are also effective.

In addition, as other antifoggants, Japanese Patent Application No. 59-565
Hydroquinone derivatives described in No. 06 (e.g., di-t
-octylhydroquinone, dodecanylhydroquinone, etc.) or hydroquinone derivatives described in Japanese Patent Application No. 59-66380, and benzotriazole derivatives (e.g., 4-sulfobenzotriazole, 5-carboxybenzotriazole, etc.) are preferably used in combination. can.

In addition, as a stabilizer, a printout preventive agent may be used at the same time, especially after processing, for example, JP-A-48-45228, JP-A No. 50-119624, JP-A No. 50-120328! ,
Halogenated hydrocarbons described in Publication No. 53-46020, specifically tetrabromobutane, tribromoethanol, 2-bromo-2-tolylacetamide, 2-bromo-2-tolylsulfonylacetamide, 2-tribromobutane, tribromoethanol, 2-bromo-2-tolylacetamide, 2-bromo-2-tolylsulfonylacetamide, Examples include bromomethylsulfonylbenzothiazole and 2,4-bis(tribromomethyl)-6-methyltriazine.

Also, Japanese Patent Publication No. 46-5393, Japanese Patent Publication No. 50-54329
A post-treatment may be carried out using a sulfur-containing compound as described in No. 50-77034.

Furthermore, U.S. Patent No. 3,301,678;
No. 506, 444, No. 3,824,103, No. 3
, 844,788, as well as the isothiuronium-based stabilizer precursor described in U.S. Patent No. 3,6
No. 69,670, No. 4,012,260, No. 4,
It may contain activator stabilizer breaker etc. described in 060,420 and the like.

Also, sucrose, 19 84 Fe (SO,, )
A water release agent such as 12H20 may be used, and furthermore, water may be supplied and heat development may be carried out as in JP-A-56-132332.

In addition to the above-mentioned components, the heat-developable color photosensitive material of the present invention may further include various components such as a spectral sensitizer, an antihalation dye, a fluorescent brightener, a hardener, an antistatic agent, a plasticizer, and a spreading agent. Additives, coating aids, etc. are added.

The heat-developable color photosensitive material of the present invention basically contains (1) photosensitive silver halide, (2) reducing agent, (3) dye-providing substance, and (4) binder in the same layer, and further contains, if necessary, According to (5), it is preferable to contain an organic silver salt.

However, these do not necessarily need to be contained in a single photographic constituent layer; for example, the photosensitive layer may be divided into two layers, and the components (1), (2), (4), and (5) may be added to one layer. If the dye-providing substance (3) is contained in one side photosensitive layer and the other layer adjacent to this photosensitive layer contains the dye-providing substance (3), it is divided into two or more photographic constituent layers as long as they can react with each other. It may also be included.

Further, the photosensitive layer may be divided into two or more layers, such as a high-sensitivity layer and a low-sensitivity layer, and may further include one or more other photosensitive layers having different color sensitivities. It may also have various photographic constituent layers such as an overcoat layer, an undercoat layer, a backing layer, and an intermediate layer.

Similar to the heat-developable photosensitive layer of the present invention, coating solutions are prepared for the protective layer, intermediate layer, undercoat layer, back layer, and other photographic constituent layers, using the dipping method, air knife method, curtain coating method, or U.S. The photosensitive material can be prepared by various coating methods such as the hopper coating method described in Japanese Patent No. 3,681.294.

Furthermore, if desired, two or more layers can be applied simultaneously by the methods described in US Pat. No. 2,761,791 and British Patent No. 837,095.

The above-mentioned components used in the photographic constituent layers of the heat-developable color light-sensitive material of the present invention are coated on a support, and the coating thickness is as follows:
The thickness after drying is preferably 1 to 1,000 μm, more preferably 3 to 20 μm.

After the heat-developable color photosensitive material of the present invention is imagewise exposed as it is, it is usually 80°C to 200°C, preferably 120°C to 1°C.
Color development can be carried out simply by heating in a temperature range of 70° C. for 1 second to 180 seconds, preferably 1.5 seconds to 1208). Further, if necessary, the water-impermeable material may be recessed and developed, or preheating may be performed in a temperature range of 70° C. to 180° C. before exposure.

Various exposure means can be used for the heat-developable color photosensitive material according to the present invention. The latent image is obtained by imagewise exposure to radiation, including visible light. Light sources commonly used for regular color printing, such as tungsten lamps,
Mercury lamps, xenon lamps, laser beams, CRT beams, etc. can be used as light sources.

As the heating means, all methods applicable to ordinary heat-developable photosensitive materials can be used, such as contacting with a heated block or plate, contacting with a heated roller or drum, passing through a high-temperature atmosphere, etc. Alternatively, high frequency heating may be used, or furthermore, a conductive layer may be provided in the photosensitive material of the present invention or in the image receiving layer (element) for thermal transfer, and Joule heat generated by electricity or a strong magnetic field may be utilized. There are no particular restrictions on the heating pattern, including methods of preheating (breheating) and then reheating, continuously raising, lowering, or repeating heating at a high temperature for a short time, or at a low temperature for a long time, and Although discontinuous heating is possible, a simple pattern is preferred. Alternatively, a method in which exposure and heating proceed simultaneously may be used.

The image receiving member used in the present invention only needs to have the function of receiving the dye released or formed by thermal development, and may be a mordant used in dye diffusion transfer type light-sensitive materials or JP-A-57-2
It is preferable to use a heat-resistant organic molecular material having a glass transition temperature of 40° C. or higher and 250° C. or lower, as described in Japanese Patent No. 07250 or the like.

Specific examples of the mordants include nitrogen-containing secondary and tertiary amines, nitrogen-containing heterocyclic compounds, quaternary cationic compounds thereof, U.S. Pat. Nos. 2,548,564 and 2,48
No. 4,430, No. 3,148,061, No. 3,756
, 814, vinylpyridinium cationic polymers, polymers containing dialkylamino groups as disclosed in U.S. Pat. No. 2,675,316, U.S. Pat. No. 2,882,156@
Aminoguanidine derivatives disclosed in JP-A-1989-1999
Covalently reactive polymers described in U.S. Pat. No. 3,625,694 and U.S. Pat.
96, British Patent No. 1,277.453, British Patent No. 2,01
1,012M, a mordant capable of crosslinking with gelatin, etc., and U.S. Pat.
21,852 and 2,198.063, water-insoluble mordants disclosed in JP-A-50-61228@, U.S. Patent No. 3,788,
No. 855, West German Patent Application (OLS) No. 2,843,32
0%, JP-A-53-30328, JP-A No. 52-15552
No. 8, No. 53-125, No. 53-1024, No. 5
No. 4-74430, No. 54-124726, No. 55-
No. 22766, U.S. Patent No. 3,642.482, No. 3
, 488,706@, No. 3,557,066, No. 3.
No. 271,147, No. 3,271.148, Special Publication No. 5
No. 5-29418, No. 56-36F14, No. 57-1
Various mordants disclosed in No. 2139, RD 12045 (1974) can be mentioned.

Particularly useful mordants are polymers containing ammonium salts,
A polymer containing quaternary amino groups as described in US Pat. No. 3,709,690. Examples of polymers containing ammonium salts include polystyrene-N,N,N-tri-0-hexyl-N-vinylbenzylammonium chloride, where the ratio of styrene and vinylbenzylammonium chloride is 1:4 to 4:1; Preferably the ratio is 1:1.

A typical image-receiving layer for dye diffusion transfer is obtained by coating a polymer containing an ammonium salt mixed with gelatin on a support.

As an example of the heat-resistant organic polymer substance, a molecular weight of 2.0
00 to 85,000 polystyrene, polystyrene derivatives having substituents having 4 or less carbon atoms, polyacetals such as polyvinylcyclohexane, polyvinylbenzene, polyvinylpyrrolidone, polyvinylcarbazole, polyallylbenzene, polyvinyl alcohol, polyvinyl formal, and polyvinyl butyral; Polyvinyl chloride, chlorinated polyethylene, polytrifluorinated ethylene, polyacrylonitrile, poly N, N-dimethylacrylamide, polyacrylate with p-cyanophenyl group, pentachlorophenyl group and 2,4-dichlorophenyl group, polyacrylic Chloro 7 acrylate, polymethyl methacrylate-1-, polyethyl methacrylate, polypropyl methacrylate, polyisopropyl metal acrylate, polyisobutyl methacrylate, poly tert-butyl methacrylate, polycyclohexyl methacrylate, polyethylene glycol dimethacrylate, poly-
Examples include polyesters such as 2-cyano-ethyl methacrylate-1. and polyethylene terephthalate, polycarbonates such as polysulfone and bisphenol A polycarbonate, polyanhydrides, polyamides, and cellulose acetates. Also, Polymer
)-1andbook 2r+d ad.

(J, BrandruD, E, H, 1m1le
r(lIJt 4m) J ohn W 1ley & S
The glass transition temperature listed in Ons Publishing, 40
Synthetic polymers of 'C and above are also useful. These polymeric substances may be used alone or in combination of two or more as a copolymer.

Particularly useful polymers include cellulose acetates such as triacetate and diacetate, polyamides in combinations such as heptamethylene diamine and terephthalic acid, fluorene diamine and adipic acid, hexamethylene diamine and diphenic acid, and hexamethylene diamine and isophthalic acid. , polyesters made of combinations of diethylene glycol and diphenylcarboxylic acid, bis-p-carboxyphenoxybutane and ethylene glycol, polyethylene terephthalate, polycarbonate, and vinyl chloride. These polymers may be modified. For example, polyethylene terephthalate using cyclohexane dimetatool, isophthalic acid, methoxypolyethylene glycol, 1,2-dicarbomethoxy4-benzenesulfonic acid, etc. as a modifier is also effective. Among these, particularly preferred are the
Examples include a material made of polyvinyl chloride described in Japanese Patent Application No. 8-97907, and a material made of polycarbonate and a plasticizer described in Japanese Patent Application No. 128600/1982.

The above polymer is used by dissolving it in a suitable solvent and coating it on a support to form an image receiving layer, or by laminating a film-like image receiving layer made of the above polymer on a support, or by coating it on a support. It is also possible to constitute the receiving Ia layer solely from a member (for example, a film) made of the above polymer (combined as an image receiving layer support type).

Further, the image-receiving layer may be constructed by providing an opaque layer (reflective layer) containing titanium dioxide or the like dispersed in gelatin on the image-receiving layer on a transparent support. In this opacification 1, a reflective color image is obtained by viewing the transferred color image from the transparent support side of the image-receiving layer.

In the following margin [Examples] Examples of the present invention are shown below, but the embodiments of the present invention are not limited to these.

Example 1 Exemplary dye-providing substance (10) 730 μl was dissolved in 2 ml of ethyl acetate, ice. This solution was mixed with 3 cc of a 2.5% gelatin aqueous solution containing a surfactant, water was added to make the mixture 6.5 cc, and the mixture was dispersed with a homogenizer to obtain a dispersion of the dye-providing substance.

6.5 cc of the above dispersion was mixed with 3.5 cc of water containing 450 mg of polyvinylpyrrolidone (average molecular weight 30,000) and 50 (leg) of 1,5-bentanediol, and 10% guanidine trichloroacetic acid in ethanol solution 0.
611'' and 2 CC mg of the above-mentioned exemplary reducing agent (R-3), I)H was adjusted to 5.5 with 3% citric acid. A silver iodobromide emulsion with an average particle size of 0.1 μm was added to this dispersion in an amount of 1×10 −3 mol in terms of silver (containing 85° of gelatin), water was added to make up to 15 cc, and the emulsion was placed on a polyethylene terephthalate support. A photosensitive layer was applied using a wire bar so that the dry film thickness was 8 μm.

After drying the resulting light-sensitive material, a white exposure of 1B, 0OOCM S was applied through a step wedge.

Next, the image-receiving layer surface of an image-receiving sheet on which polyvinyl chloride as an image-receiving layer material was separately coated on baryta paper and the coated surface of the exposed photosensitive material were superimposed, and thermal development was performed at 150° C. for 1 minute to form an image-receiving sheet. was peeled off to obtain a magenta transferred image on the image-receiving sheet. Table 1 shows the maximum reflection density (DIaX) and fog ([)Bin) of the obtained transferred image.

Comparative Example 1 A photosensitive material similar to Example 1 was prepared except that the dye-providing substance in the photosensitive material of Example 1 was replaced with Comparative Dye-providing Substance (A) below, and heat development was performed in the same manner as in Example 1. Ta.

The results are shown in Table-1.

Comparative dye-providing substance (2) Print-1 As is clear from the results in Table-1, in the heat-developable color photosensitive material that does not use a loaded silver salt, in the sample using the dye-providing substance of the present invention, the comparison sample It can be seen that DIlla× is large and [) min is small compared to .

Example 2 Preparation of 4-sulfobenzotriazole silver
-Sulfobenzotriazole and 4 g of sodium hydroxide were added to and dissolved in ethanol-water (1:1) mixture 3oo+J'. Add 2O of 5N 1111M silver solution to this solution.
ral was added dropwise. This wA5 normal sodium hydroxide solution was also added dropwise at the same time to maintain 1) H at 7-8. The solution was stirred for 1 hour at room temperature and then worked up to 4ooJ with water to give a 40% excess of 4-sulfobenzotriazole.
- A sulfobenzotriazole silver solution was prepared.

[Preparation of photosensitive material J 730 mg of the same exemplary dye-providing substance (10) as in Example 1
and 30 aΩ of 1,4-dioctylhydroquinone were dissolved in 2.1 cc of ethyl acetate. This solution was mixed with 3 cc of a 2.5% gelatin aqueous solution containing a surfactant, water was added to make 6.5 cc, and the mixture was dispersed with a homogenizer to obtain a dispersion of the dye-providing substance. The above 4-sulfobenzotriazole silver solution 4- and the above dispersion of the dye-providing substance 6
After mixing cc and further adding 450 mg of polyvinylpyrrolidone (average molecular weight 30,000), 420 mg of pentaerythritol 120111+I+, 1,5-bentanediol and 200 mg of the same reducing agent (R-3) used in Example 1. , pH was adjusted to 5.5 with 3% citric acid. This dispersion has an average particle size of 0.05μ.
m silver iodobromide emulsion was added to 3 x 10-4 mol in terms of silver (containing 751 g of gelatin), water was added to make 14 m, 9
After finishing, a photosensitive layer was coated onto a polyethylene terephthalate support using a wire bar so as to have a dry film thickness of 8 .mu.m.

After drying the obtained light-sensitive material, a white exposure of 32,000 CM S was applied through a step wedge.
A similar image-receiving sheet was subjected to heat development under the same conditions to obtain a magenta transferred image on the image-receiving sheet. The maximum reflection density (Dmax) and fog (Dmi) of the obtained transferred image
n) are shown in Table-2.

Example 3 A photosensitive material similar to that of Example 2 was prepared except that the dye-providing substance in the photosensitive material of Example 2 was replaced with the dye-providing substance shown in Table 2, and the same photosensitive material as that of Example 2 was subjected to heat development. A transferred image was obtained on the image-receiving sheet.

The results of the obtained transferred image density are also shown in Table 2.

Example 4 A photosensitive material similar to that of Example 2 was prepared except that the reducing agent in the photosensitive material of Example 2 was replaced with one shown in Table 2, and the same exposure and heat development as in Example 2 were carried out. As a result, a magenta transfer image was obtained. The results of the obtained transferred image density are also shown in Table 2.

Comparative Example-2 In the light-sensitive material of Example-2, dye-providing substance (10)
The same photosensitive material as in Example 2 was prepared, except that the above comparative dye-providing substance (A) and the following comparative dye-providing substance (8) were replaced, and the same photosensitive material as in Example 2 was carried out and the material was printed on an image-receiving sheet. A transferred image was obtained. The results are shown in Table-2.

Comparative dye-donor substance (B) Shi,i.

Table 2 As is clear from the results in Table 2, in the heat-developable color photosensitive materials using organic silver salts, the samples using the dye-providing substance of the present invention have a larger DIIla× than the comparative samples. [) It can be seen that ff1ir+ is small.

Patent applicant: Konishiroku Photo Industry Co., Ltd. Agent: Miyao Ichinose, patent attorney 2. If'l! Omi Ri 1! (Officer

Claims (1)

[Scope of Claims] A heat-developable color photosensitive material comprising at least a photosensitive silver halide, a binder, a reducing agent, and a dye-providing substance represented by the following general formula (1) on a support. General formula (1) ▲There are mathematical formulas, chemical formulas, tables, etc.▼ In the formula, X represents an oxygen atom or a sulfur atom, Y represents a collection of atoms necessary to form a benzene ring or a naphthalene ring, and J represents It represents a divalent bonding group, D represents a residue of a diffusible dye, and n represents 0 or 1.