JPS61210349A - 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 a formula I and/or a dye providing substance represented by formula 2 on the support is used. In the formulae, Cp is a group capable of reacting with the oxidized product of the reducing agent; Z is a group of atoms required to form a heterocyclic ring contg. nitrogen; J is a bivalent combining group; D is a residue of a diffusible dye; each of R1 and R2 is H or (J)nD; R1 and R2 may be groups which bond to each other to form a carbocyclic ring having (J)nD on the ring as a substituent; 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 heat development. 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 1 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 demands.

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. 61.210 and No. 3,164,328 disclose heat-developable color photosensitive materials in which a color image is formed by a reaction between an oxidized product of an 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 a reaction between an oxidized product of a sulfonamide phenol or sulfonamide aniline derivative developing agent and a coupler. However, in these methods, a reduced silver image and a color image are simultaneously generated in the exposed area after thermal development, resulting in a problem that the color image becomes cloudy. To solve this problem, there is a method of removing the silver image by liquid processing or transferring only the dye to another layer, such as an image receiving sheet having an image receiving layer, but it is necessary to distinguish between unreacted materials and the dye. The problem is that it is not easy to transfer only the dye.

In addition, as described in Research Disclosure No. 16968, a heat development method is used in which an organic imino silver salt having a dye moiety is used, the imino group is liberated in the exposed area 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, with this method, it is difficult to suppress the release of dye in areas that are not exposed to light.
This has the problem that a clear color image cannot be obtained.

Also, JP-A-52-105821, JP-A No. 52-1058
No. 22, No. 56-50328, U.S. Patent No. 4,
No. 235,957, Research Disclosure No. 14448, Research Disclosure No. 15227, Research Disclosure No. 18137, etc. disclose heat-developable color photosensitive materials in which a positive color image is formed by a heat-sensitive silver dye bleaching method. However, this method requires extra steps and photographic construction materials, such as stacking and heating sheets containing activators to speed up the bleaching of the dyes, and the resulting color images do not survive long-term storage. Another problem is that it is 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 heat-developable 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-57-179840 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. In this way, techniques using bases or base precursors,
Heat-developable photosensitive materials using organic silver salt oxidizing agents have problems in that the presence of a base increases fog and results in a low maximum density.

In order to improve the drawbacks of the above-mentioned heat-developable photosensitive materials, Japanese Patent Application Laid-open Nos. 57-186744, 57-20725, 59-12431, 59-48765, and 59-
No. 116642, No. 59-116643, No. 59-1
Publications such as No. 74834 disclose heat-developable color photosensitive materials in which a transferred image is obtained using a dye-providing substance that reacts with an oxidized form of a reducing agent to release a diffusible dye.

However, the dye-providing substance described in this publication has a low reaction (coupling reaction) with the oxidized form of the reducing agent under the conditions of thermal development, so a transferred image with a sufficient maximum density (Omax) cannot be obtained. There is no or there is no cover ([)mi
It has the disadvantage of high n), and a dye-releasing dye-donating substance that can provide images with sufficient performance in both DIlla× and Dmin has not been obtained.

[Object of the Invention j The object of the present invention is to solve the problems of the above-mentioned dye-providing substances. That is, an object of the present invention is to provide a heat-developable color photosensitive material containing a novel dye-providing substance.

Another object of the present invention is to provide a heat-developable color photosensitive material capable of obtaining color images with high image density and low fog.

[Structure of the Invention] As a result of intensive research in order to achieve the above object, the present inventors have prepared at least a photosensitive silver halide, a binder, a reducing agent and the following general formula (1) and/or (2) on a support. It has been found that the above objects of the present invention can be achieved by a heat-developable color light-sensitive material having the dye-providing substance shown above.

General formula (1) General formula (2) In the formula, Cp represents a group capable of reacting with the oxidized form of the reducing agent,
2 represents an atomic group necessary to form a nitrogen-containing heterocycle,
J represents a bonding group of 21iffi, D represents a residue of a diffusible dye, R1 and Rλ are hydrogen atoms, −←J +
, -D or a group bonded to each other to form a carbocyclic ring having fJ+-D as a substituent on the ring, n is O or 1
represents.

Below is a blank space [Specific structure of the invention] In the general formulas (1) and (2), C2 represents a group (coupler residue) capable of reacting with the oxidized form of the reducing agent, and the coupler residue is present at the active site. Examples of the coupler residue represented by OCl bonded to a group containing a diffusible dye include a group represented by the following general formula.

General formula (3) General formula (4) General formula (5
) General formula (6) General formula (7)
General formula (8) S in R4 General formula (9) General formula αQ General 2 α In general formula (6), R3, R4, R5
and the mountains represent hydrogen atoms, halogen atoms, alkyl groups, cycloalkyl groups, aryl groups, acyl groups, alkyloxycarbonyl groups, aryloxycarbonyl groups, alkylsulfonyl groups, arylsulfonyl groups, carbamoyl groups, sulfamoyl groups, and acyloxy groups, respectively. group, amine group, alkoxy group, aryloxy group, cyano group, ureido group, alkylthio group, arylthio group, carboxy group, sulfo group, or a heterocyclic residue, which can further be a hydroxyl group, carboxy group, sulfo group, or alkoxy group. , a cyano group, a nitro group, an alkyl group, an aryl group, an aryloxy group, an acyloxy group, an acyl group, a sulfamoyl group, a carbamoyl group, an imide group, a halogen atom, or the like.

Among these coupler residues, particularly preferred in the general formula (1) are those represented by the general formula (5) or η, and in the general formula (2), the coupler residues represented by the general formula ( 5) is a coupler residue represented by
At least one of Rs and Bird is preferably a ballast group or a group substituted with a ballast group in order to make the dye-donating substance represented by the general formula (υ and/or (2) non-diffusible. Ballast As a group, the number of carbon atoms is 8 (&
1 or more (more preferably 12 or more) organic groups, or hydrophilic groups such as sulfo groups and carboxy groups, or 8 or more (more preferably 12 or more) carbon atoms and sulfo groups,
Examples include groups that contain both a carboxy group and a hydrophilic group. Another particularly preferred ballast group can include polymer chains.

For example, a group represented by the following general formula is preferable.

General formula (to) General formula α◆ General formula (2)
General formula α General formula Qη General formula a1 General formula (to) In the general formula, Rv is a hydrogen atom, a halogen atom, an alkyl group, a cycloalkyl group, an aryl group, an acyl group, an alkyloxycarbonyl group, and an aryloxycarbonyl group, respectively. group, alkylsulfonyl group, arylsulfonyl group, carbamoyl group, sulfamoyl group, acyloxy group, amino group, alkoxy group, aryoloxy group, cyano group, ureido group.

represents an alkylthio group, an arylthio group, a carboxy group, a sulfo group, or a heteroma group, which further includes a hydroxyl group,
Carboxy group, sulfo group, alkoxy group, cyano group, nitro group, alkyl group, aryl group, aryloxy group,
It may be substituted with an acyloxy7 group, an acyl group, a sulfamoyl group, a carbamoyl group, an imide group, a halogen atom, or the like.

The bonding group for 2(itu) represented by J is preferably a group represented by the following general formula.

General formula (c) General 24 General formula (to) R
・10+Rs+m-0(-CI(C&O+m-N)ICO
10Rs% General formula (c) General formula (c)
-CONH+Rs9 -NHCONH+Rs
+m General formula (Foundation) -NH8O
*÷L% NH8O! NH+R4+n
1 General formula (c) General formula kangarasu ■ -3(-RI+m-1cHcHsO+rrl general formula kangarasu
General formula 0 Lum SO Translation H + ν to N + Rs + rn General formula 0 → + In the above formula 9, Rs represents an optionally substituted alkylene group, arylene group or aralkylene group, a circle represents a hydrogen atom or an alkyl group, and m represents a hydrogen atom or an alkyl group. Represents 0.1 or 2.

The carbon ring formed by bonding R1 and R2 to each other is preferably an aromatic ring, more preferably a benzene ring.

Furthermore, the residue of the diffusible dye represented by D has a molecular weight of 800 or less, preferably 6
It is preferably 00 or less, and examples thereof include residues of azo dyes, azomethine dyes, 12, anthraquinone dyes, naphthoquinone dyes, styryl dyes, nitro dyes, quinoline dyes, carbonyl dyes, phthalocyanine dyes, and the like.

It also includes the case where a dye is formed together with an aromatic ring formed by combining these colors. These dye residues may be in the form of temporary short wavelengths that can be multicolored 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 JP-A-59-48765 and JP-A-59-1.
The chelatable dye residues described in No. 24337 are also a preferred form.

Next, typical examples of the dye-providing substance represented by the above general formula (1) or (2) will be shown, but the present invention is not limited thereto.

OHCH3 Hs *Copolymer with OCH OH (containing 30% by weight of dye-donor substance) cvoH 0x on OsH The dye-donor substance of the present invention is synthesized, for example, as follows.

Synthesis Examples Synthesis of Illustrative Dye Donor Substance (1) ■Synthesis of Intermediate (A) N-[3-(N-hexadecylcarbamoyl)phenyl]-α-bromobenzoylacetamide, 5B, 5Q and 3-methyl- 4-(p-nitrobenzyl)-urazole 27,517 was suspended in chloroform ysotll, and triethylamine 2211 was added dropwise at 5° C. or below while stirring. After dropping, leave it for one night and add 100cc of 1N hydrochloric acid to
After washing twice, chloroform was concentrated to obtain a white solid. Dissolve this entire amount in 100ml of acetone, add tin powder, and then add concentrated hydrochloric acid 15a+ at a temperature below 40°C.
I dropped J. After the dropwise addition, the mixture was further stirred at room temperature for 2 hours, neutralized by adding sodium carbonate, and filtered. Concentrate the filtrate to about half to give 5ooaJ! of water was added, and the mixture was further extracted with ethyl acetate. The extract was concentrated, and the resulting solid was recrystallized from acetonitrile to obtain 52.1 g of intermediate (A).

Intermediate (A) ■Synthesis of dye-donating substance (1) Intermediate (A') 3G, 2(J was dissolved in 1001J of dimethylformamide, 111J(7)!1@water 1001III containing acid was added, and the mixture was heated at 0°C. 20*J of water containing 3.5 g of sodium nitrite was added dropwise to this solution, and after the dropwise addition, the solution was further stirred at 0° C. or lower for 30 minutes to obtain a diazo solution.

Dissolve 9.2 g of 1-phenyl-3-cyano-5-pyrazolone and 8.8 g of sodium hydroxide in a mixed solution of 1501 parts of water and 150 parts of dimethylformamide, and add to this solution at 15°C.
The above diazo solution was then added dropwise.

After stirring with vrIA for 1 hour after dropping, it was poured into 11 water.
The yellow solid precipitated by neutralization with N hydrochloric acid was filtered off to obtain the desired product (43.5 g).

As these dye-providing substances, those represented by the above general formula (1) or (2) may be used alone, or those represented by the above general formula (1) and the above general formula (2) may be used. It may also be used in combination with Furthermore, two or more of these dye-providing substances may be used. The amount used is not limited, and depends on the type of dye-providing substance, whether it is used alone or in combination, or 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. You can decide accordingly, but for example, the usage amount is 0,005Q per 1mλ.
~50σ, preferably 0.1 g – iog 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.).
Alternatively, an appropriate poly7-aqueous solution (e.g. gelatin,
Polyvinyl butyral, polyvinyl pyrrolidone, etc.) can be dispersed 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 be preferably 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, it is also possible to allow a photosensitive silver salt-forming component to coexist with an organic silver salt described below to form photosensitive silver halide in a part of the organic silver salt. . The photosensitive silver salt forming component used in this preparation method is an inorganic halide, for example, a halide represented by MXn (where M represents an H atom, an N84 group or a metal atom, and X represents ciQ, sr or I is represented by n, and when M is an H atom or an N84 group, it is 1. When M is a metal atom, it represents its valence.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, 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., K2pt cf26
．． K2pt Sr6. HALI c momme.

(NH4)2 1r (J!6, <NH4-)3
1r c, c6゜(NH4)2 RLI C soft b,
(NH4)3 Ru C, &4゜(NH4>3 R
h CJ2 (,,, (NH graduate) 3 Rh Sr6 etc.)
, onium halides (e.g., tetramethylammonium bromide, trimethylphenylammonium bromide, cetylethyldimethylammonium bromide,
Quaternary ammonium halides such as 3-methylthiazolium bromide, trimethylbenzylammonium bromide, quaternary phosphonium halides such as tetraethylphosphonium bromide, benzylethylmethylsulfonium bromide, and 1-ethylthiazolium bromide. tertiary sulfonium halides, etc.), halogenated hydrocarbons (e.g., iodoform, bromoform, carbon tetrabromide, 2-bromo-2-methylpropane, etc.)
, N-halogen compound (N-chlorosuccinimide, N
-bromosuccinimide, N-bromophthalic acid imide,
N-bromoacetamide, N-iodosuccinimide,
N-bromophthalazinone, N-chlorophthalazinone, N
-bromoacetanilide, N,N-dibromobenzenesulfonamide, N-bromo-N-methylbenzenesulfonamide, 1,3-dibromo-4,4-dimethylhydantoin, etc.), other halogen-containing compounds (such as triphenylmethyl chloride) , triphenylmethyl bromide, 2-bromoram, 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 0.0010 to 50 g per layer, more preferably , 0.1g to 10g.

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 two or more layers (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-mentioned basic nucleus, the meocyanine dye may have an acidic nucleus such as a thiohydantoin nucleus, rhodanine nucleus, oxazotole nucleus, thiazolinthione nucleus, malononitrile nucleus, or pyrazolone nucleus. These acidic nuclei may be further substituted with an alkyl group, an alkylene group, a phenyl group, a carboxyalkyl group, a sulfoalkyl group, a hydroxyalkyl group, an alkoxyalkyl group, an alkylamine group or a heterocyclic nucleus. If necessary, these dyes may be used in combination. Furthermore, ascolpine WI derivatives, azaindene cadmium salts, organic sulfonic acids, etc., such as U.S. Pat. No. 2,933,390 and U.S. Pat.
A supersensitizing additive that does not absorb visible light, such as that described in the specification of , 937,089@, can be used in combination.

The amount of these dyes added is 1 x 1 o'4 mol to 1 mol per mol of silver halide or silver halide forming component. More preferably, 1 x 10''4 moles-1 x
It is 10-1 mol.

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. 31610 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. −
No. 22185, JP-A-52-31728, JP-A No. 52-1
No. 37321, JP-A-58-118638, JP-A No. 5B-
Silver salts of imino groups such as those described in publications such as No. 118639, such as silver benzotriazole, silver 5-nitrobenzotriazole, silver 5-chlorobenzotriazole, silver 5-methoxy, silver dibenzotriazole, and 4-sulfobenzo Triazole 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, 1H-tetrazole silver, 3-amino-5-benzylthio-1,2,4-triazole silver, saccharin silver, phthalazinone silver, phthalimide silver, etc., 2-mercaptobenzoxazole silver, mercaptooxadiazole silver, 2-mercaptobenzothiazole dimidazole silver, 3-mercapto-4-7enyl-1.2.4-triazole silver, 4-hydroxy-6-methyl-1.3.3a. 7-Chitrazaindene silver and 5
-Methyl-7-hydroxy-1, 2.3.4.6-pentazaindene silver, and the like. 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 organic 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. 3,784.32
No. 8 specifications, and R D No. 12146,
Same No.

15108, same No. 15127 and JP-A-1983-
Examples thereof include p-phenylenediamine-based and p-aminephenol-based developing agents, phosphoramidophenol-based and sulfonamidophenol-based developing agents, and hydrazone-based color developing agents described in Japanese Patent No. 27132 and the like. Also, U.S. Patent Nos. 3,342,599 and 3,7
No. 19,492, JP-A-53-135628, JP-A No. 54
-79035% and the like can also be used in published publications.

As a particularly preferable reducing agent, JP-A-56-146133
Examples include reducing agents represented by the following general formula (33) described in No.

General formula (33) In the formula, R10 and Rtt are hydrogen atoms, or have 1 to 30 carbon atoms (preferably 1 to 4) that may have a substituent.
represents an alkyl group, and Rlo and Rtt may be closed to form a heterocycle. R, 2, R/3Jt, and R
IS' has a hydrogen atom, a halogen atom, a doxy 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 (preferably 1 to 30) which may have a substituent. 4) represents an alkyl group, and R12 and Rlo and R14 and It may each be ring-closed to form a heterocycle. M is an alkali metal atom, an ammonium group, a nitrogen-containing organic base, or a quaternary
Represents a compound containing a class nitrogen atom.

The nitrogen-containing organic base in the above general formula (33) is
It is an organic compound containing a basic nitrogen atom that can form a salt with an acid, and an especially important organic base includes an amine compound. And as a chain amine compound, the first
Typical examples of cyclic amine compounds include lysine, quinoline, piperidine, and imidazole. In addition, compounds such as hydroxylamine, hydrazine, and amidine are also useful as quenching amines. Salts of nitrogen-containing organic bases include the above-mentioned inorganic acid salts of organic bases (e.g. hydrochloride, 1iIl
1B salt, nitrate, 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 is a margin.Next, preferred specific examples of the reducing agent represented by the above general formula (to) are shown below.

(R-1) (R-2) (R-3,1 (R-4) F3 (R-5) (R-6) (R-7,) (R-8) (R-9) (R -10) (R-11) (R-12) (R-13) (R-15) (R-16,1 (R-17) (R-18) (R-19) Shini 3 (R- 20) (R-21) (R-22) 2HI (R-23) The reducing agent represented by the above general formula (33) 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-di tart-
butyl-p-cresol, N-methyl-p-aminophenol, etc.), sulfonamidophenols [e.g. 4-
Benzenesulfonamidophenol, 2-benzenesulfonamidophenol, 2,6-dichloro-4-benzenesulfonamidophenol, 2,6-dipromo 4-
(p-toluenesulfonamide)phenol, etc.], or polyhydroxybenzene WA (e.g., hydroquinone, tert-butylhydroquinone, 2,6-dimethylhydroquinone, chlorohydroquinone, carboxyhydroquinone, catechol, 3-carboxycatechol, etc.), naphthols (e.g. α-naphthol, β-naphthol, 4-aminonaphthol, 4-methoxynaphthol, etc.), hydroxy naphthyls and methylene naphthols, e.g. 1,1'-dihydroxy-2,2'
-naphthyl, 6,6'-dibromo-2,2'-dihydroxy-1,1'-binaphthyl, 6,6-sinitro2,2'-dihydroxy-1,1'-binaphthyl, 4
．． 4'-dimethoxy-1,1'-dihydroxy-2,2
'-binaphthyl, bis(2-hydroxy-1-naphthyl)methane, etc. 1, methylenebisphenols [e.g. 1,
1-bis(2-hydrooxy-3,5-dimethylphenyl)-3゜5゜5-trimethylhexane, 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-hydroxy-3,5-di-tert)
t-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, the type of ammonium salt, and the type of other additives used, but it is usually 0 per mole 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 positive 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 vinylpyrrolidone polymer. The vinyl pyrrolidone polymer may be polyvinyl pyrrolidone, which is a homopolymer of vinyl pyrrolidone, or a copolymer (including kraft copolymers) of vinyl pyrrolidone and one or more other molymers copolymerizable with vinyl pyrrolidone. ). These polymers can be used regardless of their degree of polymerization. The polyvinylpyrrolidone may be a substituted polyvinylpyrrolidone, with preferred polyvinyl and Olidones having a molecular weight of 1.000 to 40.
0,000. 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. ,
Examples include vinyl monomers such as vinyl alkyl ethers, but it is preferable that polyvinyl and lolidone account for at least 20% (1%, the same hereinafter) of the composition ratio.

A preferred example of such a copolymer has a molecular weight of 5.00
0 to 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 a polymeric substance,
A mixture of gelatin and polyvinylpyrrolidone with a molecular weight of i, ooo to 400,000 and one or more other polymeric substances, gelatin and a molecular weight of 5,000 to 400,0
A mixture of the vinylpyrrolidone copolymer No. 00 and one or more other polymeric substances is preferred. Other polymeric substances that can be used include polyvinyl alcohol, polyacrylamide, polymethacrylamide, polyvinyl butyral, polyethylene glycol, polyethylene glycol ester, or cellulose derivative proteins,
Natural substances such as starch, polysaccharides such as gum arabic and the like may be mentioned. These range from 0 to 85%, preferably from 0 to 70%
% may be contained.

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 0.05 to 50g per layer, preferably 0.1g to 10Q.
It is. Further, the binder is preferably used in an amount of 0.1 to 10 Q, more preferably 0.25 to 4 g, per 1 g of one unit of the dye-donating substance Morima.

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, dilurea, 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 1982.
-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 No. 15734, same No.
, 15776, JP-A-56-130745, JP-A No. 56-130745
Alkali release agents such as urea and guanidium trichloroacetate described in No. 132332, etc.,
12700, US Pat. No. 3.667.9
Non-aqueous polar solvent compound having -co-, -8o, +, -3O- groups described in No. 59, US Pat. No. 3,438,7
Meltformer-1 described in '76 U.S. Pat. No. 3,666
．． 477, and polyalkylene glycols described in JP-A-51-19525. Also, as a coloring agent,
For example, JP-A-46-4928, JP-A-46-6077,
No. 49-5019, No. 49-5020, No. 49-9
No. 1215, No. 49-107727, No. 50-25
No. 24, No. 50-67132, No. 50-67641, No. 1, No. 50-114217, No. 52-33722,
52-99813, 53-1020, 53
-55115, 53-76020, 53-12
No. 5014, No. 54-156523, No. 54-156
No. 524, No. 54-156525, No. 54-15
Publications such as No. 6526, No. 55-4060, No. 55-4061, No. 55-32015, and West German Patent No. 2
, No. 140,406, No. 2,147.063, No. 2
, 220,618, U.S. Patent No. 3,080,254, U.S. Patent No. 3,847,612, U.S. Patent No. 3,782,941
No. 3,994.732, No. 4,123,28
Phthalazinone, phthalimide, pyrazolone, quinazolinone, N-hydroxynaphthalimide, benzoxazine, naphthoxazinedione, 2゜3-dihydro, which are compounds described in the specifications of No. 2, No. 4,201.582, etc. -phthalazinedione, 2,3-dihydro-
1,3-oxazine-2,4-dione, oxypyridine, aminopyridine, hydroxyquinoline, aminoquinoline, isocarbostyryl sulfonamide, 2H-1.3-
These include benzothiazine-2,4-(3H) dione, benzotriazine, mercaptotriazole, dimerkabutotetrazabentalene, phthalic acid, naphthalic acid, phthalamic acid, etc., and the combination of one or more of these with an imidazole compound Examples include mixtures, mixtures of at least one acid or acid anhydride such as phthalic acid and naphthalic acid, 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-t-riazoles and 3-acylamino-5-mercapto-1,2,4-triazoles are also effective.

Furthermore, as an antifoggant, for example,
No. 7-11173, JP-A-49-90118, JP-A No. 49
-10724, 49-97613, 50-1
No. 01019, No. 49-130720, No. 50-
No. 123331, No. 51-47419, No. 51-51
No. 435, No. 51-78227, No. 51-1043
No. 38, No. 53-19825, No. 53-20923, No. 51-50725, No. 51-3223, No. 5
No. 1-42529, No. 51-81124, No. 54-5
Publications such as No. 1821 and No. 55-93149, as well as British Patent No. 1,455,271 and U.S. Patent No. 3,88
No. 5,968, No. 3, 700,457, No. 4,1
37,079, German Patent No. 4,138,265, and West German Patent No. 2,617,907, or oxidizing agents (for example, N-
Halogenoacetamide, N-halogenosuccinimide,
perchloric acid and its salts, inorganic peroxides, persulfates, etc.)
, or acids and in situ (e.g., sulfinic acids, lithium laurate, 0 zine, diterpene acids, thiosulfonic acids, etc.), or sulfur-containing compounds (e.g., mercapto compound-releasing compounds, thiouracils, disulfides,
Simple sulfur, mercapto-1.2.4-triazole,
thiazolinthione, polysulfide compounds, 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.
t-octylhydroquinone, dodecanylhydroquinone, etc.) and hydroquinone derivatives and benzotriazole derivatives described in Japanese Patent Application No. 59-F36380 (for example, 4
-sulfobenzotriazole, 5-carpoxybenzotriazole, etc.) can be preferably used in combination.

In addition, as a stabilizer, a printout preventive agent may also be used at the same time, especially after processing.
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 Japanese Patent No. 50-77034.

Furthermore, U.S. Patent No. 3,301,678;
No. 506.444, No. 3,824,103, No. 3
．． The isothiuronium-based stabilizer precursor described in each specification of No. 844,788, and U.S. Pat. No. 3,6
No. f39,670, No. 4,012,260, No. 4
,060,420 明llll! It may contain the activator stabilizer precursor described in et al.

Also, sucrose, N H4F e(S 04 )2 ・1
A water-releasing agent such as 2H20 may be used, or heat development may be carried out with water as disclosed in JP-A-56-132332@.

The heat-developable color photosensitive material H of the present invention further contains, in addition to the above-mentioned components, a spectral sensitizing dye, an antihalation dye, a fluorescent brightener, li! Various additives such as odorants, antistatic agents, plasticizers, and spreading agents, coating aids, and the like are added.

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

However, these do not necessarily need to be contained in a single photographic composition 1. For example, the photosensitive II 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.

Also, is the photosensitive layer divided into two or more layers, such as a high-sensitivity layer and a low-sensitivity layer? It may have one or more photosensitive layers with roughly different color sensitivities, or it may have various photosensitive layers such as an overcoat layer, an undercoat layer, a backing layer, and an intermediate layer. It may have constituent layers.

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. Photosensitive materials can be prepared by various coating methods such as the hopper coating method described in 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 drying resistance is preferably 1 to i or 00 μm, more preferably 3 to 20 μm.

After the heat-developable color photosensitive material of the present invention is exposed to light using a model, it is usually 80°C to 200°C, preferably 120°C to
Color development is carried out by simply heating in a temperature range of 170° C. for 1 second to iao seconds, preferably 1.5 seconds to 120 seconds. Further, if necessary, the film may be developed with a water-impermeable material in close contact with the film, or it may be preheated at a temperature in the 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 O-ler or heated drum, or heating in the atmosphere of an AI waterfall. It is also possible to use Joule heat generated by electricity or a strong magnetic field by providing a conductive layer in the photosensitive material of the present invention or in the image receiving layer (element) for thermal transfer. can. There are no particular restrictions on the heating pattern, including methods of preheating and then reheating, heating at a high temperature for a short period of time, or at a low temperature for a long period of time, continuously raising, lowering, or repeating the heating. 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 polymer material having a glass transition concentration 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. 3,75
6,814, vinylpyridinium cationic polymers, diflukylamino group-containing polymers as disclosed in U.S. Pat. No. 2,675,316, U.S. Pat. No. 2,882,156
Aminoguanidine derivatives disclosed in JP-A No. 1983
4-137333, U.S. Pat. Nos. 3,625,694, 3,859,
No. 096, British Patent No. 1,277.453, British Patent No. 2,0
No. 11,012, a mordant capable of crosslinking with gelatin, etc.; U.S. Pat. No. 3,958,995;
721,852 and 2,798.063; water-insoluble mordants disclosed in JP-A-50-61228; and U.S. Patent No. 3,788.
, No. 855, West German Patent Application (○LS) No. 2,843,3
No. 20, JP-A-53-30328, JP-A No. 52-1555
No. 28, No. 5I3-125, No. 53-1024,
No. 54-74430, No. 54-124726, No. 5
No. 5-22766, U.S. Patent No. 3,642.482,
3,488,706, 3,557,066, 3,271,147, 3,271,148,
Special Publication No. 55-29418, No. 56-3 [1414,
Various mordants disclosed in No. 57-i2139, 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, molecular 12.0
00 to 85,000 polystyrene, polystyrene derivatives with substituents having 4 or less carbon atoms, polyacetals such as polygonylcyclohexane, polyvinylbenzene, polyvinylpyrrolidone, polyvinylcarbazolebenzene, polyvinyl alcohol, polyvinyl formal, and polyvinyl butyral, Vinyl chloride, chlorinated polyethylene, polybutylene trichloride, polyacrylonitrile, polyN. N
-dimethylacrylamide, polyacrylate with p-cyanophenyl group, pentachlorophenyl group and 2,4-dichlorophenyl group, polyacrylchloroacrylate, polymethyl methacrylate, polyethyl methacrylate, polypropyl methacrylate, polyisopropyl metal acrylate, polyisobutyl Polyesters such as methacrylate, poly tert-butyl methacrylate, polycyclohexyl methacrylate, polyethylene glycol dimethacrylate, poly-2-cyano-ethyl methacrylate, polyethylene terephthalate, polycarbonates such as polysulfone and sphenol A polycarbonate, polyanhydride, polyamide and cellulose acetates. Also, Polymer Handbook 2nd
ed.

(+J. Brandrup. E. H. Im
mergut [) John Wiley & S.
Also useful are synthetic polymers with a glass transition temperature of 40° C. or higher, as described in Ons Publishing. 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 dipropylamine and adipic acid; hexamethylene diamine and diphenic acid; hexamethylene diamine and isophthalic acid; Examples include polyesters made by combining 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 layer made of polyvinyl chloride described in Japanese Patent Application No. 8-91907 and a layer made of polycarbonate and a plasticizer described in Japanese Patent Application No. 128600/1983.

The above polymer is dissolved in a suitable solvent and coated on a support to form an image receiving layer, or a film-like image receiving layer made of the above polymer is laminated on a support or used by coating on a support. It is also possible to constitute the image-receiving layer by a member (for example, a film) made of the above-mentioned polymer alone (also used as an image-receiving layer support).

Furthermore, 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. This opaque layer provides a reflective color image when the transferred color image is viewed from the transparent support side of the image-receiving layer.

Margins below [Specific Effects of the Invention] The heat-developable color photosensitive material of the present invention contains a novel dye-providing substance and can provide color images with a high image 11 degree and less fogging.

[Example] Examples of the present invention are shown below, but the embodiments of the present invention are not limited thereto.

Example 1 Exemplary dye-providing substance (1) 480 mg was mixed with ethyl acetate 2
, dissolved in ice. 2. This solution contains a surfactant.
Mix with 3 cc of 5% gelatin aqueous solution and add water to make 6.5
After the mixture was made into cc, it was dispersed with a homogenizer to obtain a dispersion of the dye-providing substance.

6.50C of the above dispersion was mixed with 450I of polyvinylpyrrolidone (average molecule j 30,000) and 3.5CC of water containing 1,5-bentanediol sooig;
0% guanidine trichloroacetic acid in ethanol 0.1
After adding 1 and 200 ng of the reducing agent (R-3),
The pH was brought to 5.5 with 3% citric acid. A silver iodobromide emulsion with an average grain size of 0.1 μm was added to this dispersion in terms of silver.
After adding 0' mole (containing 85 mg of gelatin) and finishing the volume to 15 cc by adding water, the photosensitive layer was coated onto a polyethylene terephthalate support using a wire bar so as to have a dry film thickness of 8 μm.

After drying the resulting light-sensitive material, a white exposure of 16,0 OOCM S was applied through a step wedge.

Next, the image-receiving layer surface of the image-receiving sheet, in which polyvinyl chloride as an image-receiving layer material is separately coated on baryta paper, and the coated surface of the exposure flow photosensitive material are superimposed, and thermal development is performed at 150° C. for 1 minute to form an image-receiving layer. The sheet was peeled off to obtain a yellow transferred image on the image-receiving sheet. The resulting transcription ii! ii image maximum reflection density (QIlax) and fog (Dmin
) are shown in Table-1.

Comparative Example 1 A light-sensitive material similar to that of Example 1 was prepared except that the dye-providing substance (1) in the light-sensitive material of Example 1 was replaced with the following comparative dye-providing substance (A), and exposed in the same manner as in Example 1. , thermal development was performed to obtain a transferred image.

The results of the obtained transferred image density are also shown in Table 1.

Comparative Dye-Providing Substance (A) Table 1 As is clear from Table 1, in the heat-developable color photosensitive material that does not use an organic silver salt, the sample using the dye-providing substance of the present invention has a lower [ ) tsax is large,
It can also be seen that Dmlo is small.

Example 2 [Preparation of silver 4-sulfobenzotriazole] 24a-4
-Sulfobenzotriazole and 4 g of sodium hydroxide were added and dissolved in 3001 L of an ethanol-water (1:1) mixture. To this solution, 20 mp of 5N silver nitrate solution was added dropwise. At this time, a diluted sodium hydroxide solution was also added dropwise at the same time to maintain the pH at 7-8. After stirring this solution for 1 hour at room temperature, it was made up to 400111J2 with water and 4-
A 4-sulfobenzotriazole silver solution containing 20% excess of sulfobenzotriazole was prepared.

[Preparation of photosensitive material] 460a+g of the same dye-providing substance (1) as in Example 1 and 3011 g of 1,4-dioctylhydroquinone were mixed with 2.5 g of ethyl acetate. Dissolved in IOC. 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. 41 J of the above 4-sulfobenzotriazole silver solution and a dispersion of dye-providing substance 5
cc, and further added polyvinylpyrrolidone (average molecular weight 30,000) 450++g, pentaerythritol 120mc+, 1,5-bentanediol 4
20 mg and the same reducing agent (R-
3) After adding 200eo, the pH was adjusted to 5.5 with 3% citric acid. To this dispersion, 3 X 1 Q-+ moles of silver iodobromide emulsion with an average particle size of 0.05 μm in terms of silver (containing 7510 gelatin) were added, and water was added to give 14 g+, [
After finishing, a photosensitive layer was coated on a polyethylene terephthalate support by coating with a wire bar so that the dry film thickness was 8 μm.

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 yellow transferred image on the image-receiving sheet. The maximum reflection density ([)max) and fog (Dm
in) are shown in Table-2.

Example 3 A photosensitive material similar to Example 2 was prepared, except that the dye-providing substance (1) in the photosensitive material of Example 2 was replaced with the dye-providing substance shown in Table 2. Heat development was performed to obtain a transferred image on an 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. A yellow transferred image was obtained. Table 2 also shows the results of the controlled transferred image density.

Comparative Example 2 In the light-sensitive material of Example 2, the dye-providing substance (1) was replaced with the comparative dye-providing substance (A) and the following comparative dye-providing substance (
For the areas other than B), heat development was performed in the same manner as in Example 2 to obtain a transferred image on an image receiving sheet. The results of the obtained transferred image density are also shown in Table 2.

Comparative Dye-Providing Substance (B) OC Yamamote-2 As is clear from Table-2, in the heat-developable color photosensitive material using an organic silver salt, the sample using the dye-providing substance of the present invention has a higher level of improvement than the comparative sample. It can be seen that [) WaX is large and [) win is small.

ψ

Claims (1)

[Scope of Claims] A heat-developable color characterized by having at least a photosensitive silver halide, a binder, a reducing agent, and a dye-providing substance represented by the following general formula (1) and/or (2) on a support. photosensitive material. General formula (1) ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ General formula (2) ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ In the formula, Cp represents a group that can react with the oxidized form of the reducing agent,
Z represents an atomic group necessary to form a nitrogen-containing heterocycle,
J represents a divalent bonding group, D represents a residue of a diffusible dye, R_1 and R_2 are hydrogen atoms, -(J)_n
-D or a group that is bonded to each other to form a carbocyclic ring having -(J)_n-D as a substituent on the ring, and n represents 0 or 1.