JPH02300744A - Heat developable color photosensitive material - Google Patents

Abstract

PURPOSE:To form a cyan dyestuff which is novel and is stable under the conditions of heat development by incorporating a specific cyan dyestuff forming coupler into the above material. CONSTITUTION:At least a photosensitive silver halide, a reducing agent, a binder, and the cyan dyestuff forming coupler expressed by formula I are incor porated into the above material. In the formula I, R denotes a group of >=0.3 value of Hammette substituent constant sigma p; X denotes a hydrogen atom or the group which can be eliminated by coupling reaction with the oxidant of the reducing agent; Y denotes a nonmetal atom group necessary for forming a nitrogenous heterocyclic group. The photosensitive material which contains the novel cyan couple and has good stability under heat development is obtd. in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heat-developable color photosensitive material, and more particularly to a heat-developable color photosensitive material containing a novel cyan coupler.

[Background of the invention]

A photosensitive material (thermally developable photosensitive material) that can easily and quickly form an image by carrying out a dry process using heat in the development process is well known. No. 43-4924, Fundamentals of Photographic Engineering (Published by Corona Publishing, 1979), pages 553-555.
Page, and Research Disclosure Magazine 1978 6
It is described on pages 9 to 15 of the monthly issue (RD-17029).

Furthermore, in recent years, attempts have been made to develop heat-developable color photosensitive materials that produce color images using various dye-providing substances. Among these methods, the method of releasing or forming a diffusible dye through heat development and then transferring the dye to obtain a color image is preferred in terms of image stability and clarity and processing simplicity and speed. It is excellent. This transfer method heat-developable color photosensitive material and image forming method are disclosed in Japanese Patent Application Laid-Open No. 59-1.2431.
No. 59-1591.59, No. 59-181345
No. 59-229556, No. 60-2950, Old No. 52643, No. 61-61158, No. 61. −
No. 61157, No. 59-180550, No. 61-13
No. 2952, No. 61-139842, U.S. Patent No. 4,5
No. 95,652, No. 4,590,154 and No. 4,5
84,267 etc.

In particular, the method of forming J:ri dye in the campling reaction is
It has excellent features such as good separation of images and non-images (discrimination) and no sensitivity loss.

However, the example is JP-A No. 60-2950, the same issue,
The cyan couplers described in the same issue tend to have poor thermal stability and transferability of the dyes formed compared to yellow couplers and macenta couplers, and the conversion of the dyes formed by color reaction into images. Due to the low efficiency, there was a problem in that large amounts of silver, coupler, or reducing agent were used to obtain images of sufficient density.

In addition, known cyan couplers for heat development are either absorption or blow 1.
-, and there is secondary absorption on the shortwave side.

Therefore, there has been a strong desire to develop a cyan coupler that forms a dye with sharp absorption and no secondary absorption on the short wavelength side.

[Purpose of the invention]

An object of the present invention is to provide a photothermographic material containing a novel cyan coupler.

Another object of the present invention is to provide a photothermographic material containing a coupler that forms a stable cyan dye under thermal development conditions.

Another object of the present invention is to provide a heat-developable photosensitive material containing a coupler that forms a cyan dye having good color reproduction, favorable absorption characteristics, and a high molar extinction coefficient.

Still another object of the present invention is to provide a photothermographic material containing a coupler that forms a cyan image with good transferability.

Yet another object is to provide a heat-developable photosensitive material with a reduced amount of silver.

[Structure of the invention]

As a result of extensive research, the present inventors have discovered that a heat-developable color photosensitive material containing at least a photosensitive silver halide, a reducing agent, a binder, and a cyan dye-forming coupler represented by the following general formula (1) on a support. The inventors have discovered that the above object can be achieved and have accomplished the present invention.

General formula (1) In the formula, R represents a group having a substituent constant σp value of 0°3 or more, and X is a hydrogen atom or a group that can be separated by a coupling reaction with an oxidized form of a reducing agent. , and Y represents a nonmetallic atomic group necessary to form a nitrogen-containing heterocycle.

[Specific structure of the invention]

First, the coupler represented by general formula (1) will be explained.

In general formula (1), R is Hammett's substituent constant σp
However, the value of the substituent R is extremely important for the absorption of the dye produced by the camping reaction, and substituents with a dp value of less than +0.3, such as alkyl groups, , λmax of the dye produced for the alkoxy group
It usually does not exceed 600 nm and provides only magenta dye. σp value is 100.3
Examples of larger substituents include -〇〇OR+, -C
0NR, R3, -CN, -CF3, -3OR,, -3O
2R,, -302NR2R3 (here, R1 represents an alkyl group or an aryl group, R2 and R3 each represent a hydrogen atom, an alkyl group, or an aryl group, and the alkyl group and the aryl group may be further substituted.) X represents a hydrogen atom or a group that can be separated by a coupling reaction with an oxidized form of a reducing agent, and examples of groups that can be separated include a halogen atom, -OR, -SR,, -NH3O2
R-NHCOR, -N=NR5 or a nitrogen-containing heterocyclic group. (R4 represents an alkyl group, an aryl group, or a heterocyclic group, and R6 represents an aryl group or an aromatic heterocyclic group, and these groups may further have a substituent.) Y represents a nitrogen-containing heterocycle. It represents a group of nonmetallic atoms necessary to form a ring, or preferably it is a 5-membered ring, and may form a condensed ring with another ring.

Compounds represented by general formula (1) include general formulas (2) to
Compounds represented by (8) are preferred, particularly those represented by general formula (2)
Or the compound (3) is preferable.

General formula (2) General formula (3) General formula (4) General formula (5) General formula (6) General formula (7) General formula (8) In general formulas (2) to (8), R and X are General formula (1
) have the same meaning as R and X, respectively.

R6, Ry, R8 and R9 may be the same or different, and each represents a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an acyloxy group, an acylamino group, an anilino group, or a carbamoyl group. , carbamoylamino group, carbamoyloxy group,
Atoms or groups such as sulfamoyl group, sulfamoylamino group, sulfamoyloxy group, ureido group, imide group, alkoxycarbamoylamino group, alkoxycarbonyl group, aryloxycarbonyl group, alkylsulfonyl group, arylsulfonyl group, cyano group, etc. and these may be further substituted.

In particularly preferred general formula (2) or (3), R7 is particularly preferably an aryl group which may have a substituent.

A preferred embodiment of the heat-developable color light-sensitive material of the present invention is a dye transfer type heat-developable color light-sensitive material.
In order to achieve both dye transferability and coupler immobilization,
The leaving group represented by is -OR,, -3R,, -NH302
R-N HCOR-N=NR, or a nitrogen-containing heterocyclic group, and R,, R5 and the nitrogen-containing heterocyclic group are Halas 1-
Substituted with a group.

Examples of the ballast group include organic groups and polymer residues having 12 or more carbon atoms, which have a molecular size and type that can immobilize the coupler represented by general formula (1) during thermal development. , especially polymer residues.

In addition, for the transferability of the dye, it is preferable that the substituents other than X of the coupler represented by general formula (1) have 8 or less carbon atoms, and the number of carbon atoms of the substituents other than X The total sum is preferably 10 or less.

When the ballast group is substituted with X and the ballast group is a polymer, the coupler represented by the general formula (1) is preferably a horn slurry having a repeating unit represented by the following general formula (9).

General formula (9) % formula %) In the formula, R and Y each have the same meaning as defined in general formula (1).

X' is -0-1-s-1-NH3O2-1-NHCO-
1-N=N- or a nitrogen-containing heterocyclic group. Jl and J2
are each a divalent linking group (e.g. -0-1-S-1-CO-
1-3O7-1-COO-1-0CO-1-CONH-
1-NHCO-1-3O□NH-1-NH3O2-1-
NHCOCH2-1-CH2C0NH-), and Zl
and Z2 each represent a divalent hydrocarbon group (for example, an alkylene group such as methylene or ethylene, or an arylene group such as phenylene); n and R2 each represent 0 or 1. Moreover, Rlo represents a hydrogen atom or an alkyl group (methyl, ethyl, butyl, etc.).

Typical specific examples of the cyan coupler represented by the general formula (1) of the present invention are listed below.
p, (J
(J-+ll- 1x ♂ 11 o・rXI 7 01 to 1 l:!2 5 --'h
l l l
lROQ Q Q -;.

−. Bo 1 meditation ω ○ Ql
1 11
1 Y To 1 True 0 RO'' To 11 QIJ OC) To 1 Ta Ki Riya Q
○ Q=19-' = i-meditation Q Q
Ql 1 1-i
-Work〆 ○ O○ -a- 2 〇 〇 Ql
11 and coupler X
Re2O3 x:y=50:50 (wt%) m1L x:y=70:30 (wt%) 〆 = deception “ “ ′” 1 〆 01: ”〆
= − μ−− 〆 ○ ○]
j 〆 =
=--== Mr.!
! Seven IJ
tJ These cyan couplers of the present invention are J, Che
m, Soc, .

Perkin I, 2047. (1977), J.H.
eterocycle Chem, 11°423 (19
74), Ber, 32,797 (1899), Chem
, Ber, 95, 2861.2881 (1962),
U.S. Patent Nos. 3,705,896 and 3,725,067
No., Special Publication No. 46-43947, Japanese Patent Publication No. 60-2203
No. 46, No. 60-43659, No. 63-250649
No. 62-123158, No. 63-250650, No. 63-264753, etc., and can be easily synthesized.

Typical synthesis examples are shown below.

Synthesis Example 1 (Synthesis of Compound C-2) (Synthesis Route) -NH (c) -NH (d) ].Lifluoroacetate I-acetic acid ester (a) 184.
1 g was ice-cooled to 5°C and chlorine gas was blown into it for 2 hours.

After passing a nitrogen gas through this solution to remove chlorine and hydrochloric acid dissolved in the system, it was dissolved in ethanol 2D. To this solution, 95.0 g of (b)] was added, heated under reflux for 7 hours, cooled to room temperature, precipitated sulfur was filtered off, and purified by column chromatography.

Yield: 160.4 g The structure was confirmed by 'IINMR, IR and mass spectrometry.

-i'l- Intermediate (c) 160.4g, 1.5Q of ethanol and 220ml of 50% hydroxylamine aqueous solution. was added and heated under reflux for 7 hours. After distilling off the solvent under reduced pressure, 800 nlt of toluene was added and stirred, and the crystals were filtered out.
0m0. Intermediate (d) becomes white crystals after washing with water of 10
4.8g was obtained.

(Confirmed by 'HNMR, IR and mass spectrum) Synthesis of intermediate (f) Intermediate (d) 104.8g was mixed with 1.50. of sodium acetate in 200 mff of water.
An aqueous solution containing g was added. The mixture was stirred vigorously and 500ml of ethyl acetate was added. A solution in which 66.0 g of (e) was dissolved was added dropwise over about 1 hour, and the mixture was stirred at room temperature for 4 hours. The organic layer was separated, washed with water, dried, and then the solvent was distilled off under reduced pressure to obtain an oily product. This is acetyl
- Recrystallization was performed with a mixed solvent of lyluchloroform to obtain 1.30.5 g of intermediate (f) as white crystals.

(Confirmed by 'HNMR, IR and mass spectrometry)
Synthesis of Intermediate (g) 1-Lue 72-512 and 65.3 g of phosphorus oxychloride were added to 130.5 g of Intermediate (f) and heated under reflux for 2 hours. The solvent was distilled off under reduced pressure and the residue was dissolved in ethyl acetate and washed three times with 500 m4 of brine. The solvent was distilled off under reduced pressure, and the residue was recrystallized with ethanol to obtain 100.0 g of intermediate (g) as white crystals. (Confirmed by 'HNMR, IR, and mass spectrum) Synthesis of intermediate (h) 85 mff of water and 85 ml of concentrated sulfuric acid were added to 100.0 g of intermediate (g), and the mixture was heated and stirred at 120 to 135°C for 4 hours. Add 500 g of ice to the reaction solution, and then add 500 m of saturated brine. and ethyl acetate 2a were added to separate the layers, and the organic layer was washed three times with 500 mff of water and then dried over magnesium sulfate. The solvent was removed under reduced pressure, and the residue was further recrystallized with ace].nitrile to obtain 43.3 g of intermediate (i).

(Confirmed by 'HNMR, IR and mass spectrum) Synthesis of intermediate (1) Intermediate (h) 43, 3 g was mixed with 1.2 g of chloroform.
0. Dissolve N-talolosuccinimide 26 at room temperature.
．． 4 g was gradually added and stirred for 5 hours. After distilling off the solvent under reduced pressure, it was dissolved in ethyl acetate and washed three times with 200ml of water.

The organic layer was dried over magnesium sulfate, the solvent was distilled off, and then recrystallized from a chloroform-acetonitrile medium to obtain 32.0 g of intermediate (i).

(Confirmed by 'HNltlR, IR and mass spectrometry) Synthesis of intermediate (j) 7.7 g of p-nitrothiophenol and 1 to 2 g of hydroxide were added to 100 ml of dimethylformamide. Add to this and stir for a while. (i) 100 m4 of a solution of 14.3 g in dimethylformamide was added dropwise. Approximately 50°C after dropping
The mixture was allowed to react for 3 hours. This reaction solution was added to 300 mff of water, neutralized with dilute hydrochloric acid, and the precipitated solid was filtered off. This solid was purified by column chroma 1-graphie using silica gel to obtain 13.7 g of intermediate (j).

(Confirmed by 'HNMR, II? and mass spectrometry) 13.7 g of synthetic intermediate (j) of compound C-2 was added to a mixed solution of 100 mff of tetrahydrofuran and ethanol, and catalytic hydrogen reduction was performed using palladium/carbon as a catalyst. Filter the reaction solution,
After concentration, add 200 mff of acetonitrile and 5 m of pyridine.
12 was added and redissolved. In this solution (0.) 10, 9
g was added slowly and the mixture was refluxed for an additional 1.5 hours. The reaction solution was added to water, extracted with ethyl acetate, the extract was dried over magnesium sulfate, and then concentrated. The obtained candy-like solid is recrystallized with acetinitrile to obtain the desired C-2
20.0g was obtained.

(Confirmed by 'HNMR, IR and mass spectrum)
Synthesis Example 2 (Synthesis of Compound C-10) 15.0 g of intermediate (k) of Synthesis Example 1 was dissolved in a mixed solution of 200 mff of acetonitrile and 1Qm12 of pyridine, and a solution of 4.6 g of methacrylic acid chloride in 30 mO of acetonitrile was added dropwise. After the dropwise addition, the mixture was stirred at room temperature for 2 hours, the reaction solution was added to 300 mff of water, and the precipitated solid was filtered off. This solid was purified by chromatography to obtain 13.3 g of coupler monomer.

10 g of coupler monomer and 10 g of butyl acrylate were dissolved in 1.0 g of dimethylformamide. The mixture was dissolved in 0.0 m (l) and heated to 75°C without degassing with nitrogen gas. 600 mg of azobisisobutyronitrile was added to this solution while passing nitrogen gas through it, and the mixture was reacted at about 80°C for 4 hours. I let it happen.

The reaction solution was added to water, and the precipitated solid was filtered off and dried to obtain 18.8 g of the desired polymer coupler C-10.

31- Examples of the dye-providing substance used in the heat-developable color photosensitive material of the present invention include JP-A-62-44737 and JP-A-62-44737.
Couplers that form non-diffusible dyes as described in U.S. Pat. Although an azo dye used in the heat-developable dye bleaching method can be used as the dye-donating substance, it is more preferable to use a diffusible dye-donating substance that forms or releases a diffusible dye. It is preferable to use a compound that forms a more diffusible dye.

Diffusible dye-providing substances that can be used in the present invention will be explained below. Diffusible dye-donor substances include any substance that participates in the reduction reaction of the photosensitive silver halide and/or the organic salt used if necessary, and that can form or release a diffusible dye as a function of the reaction. Depending on the reaction mode, some dye-donors of the negative type act on a positive function (i.e., those that form poor dye images when using silver halide of the negative type) and others act on a negative function. They can be classified as working positive-working dye-donors (ie, those that form a positive dye image when using negative-working silver halide).

As a negative dye-donating substance, for example, U.S. Pat.
No. 63.079, No. 4,439,513, JP-A-59
-60434, 59-65839, 59-71
No. 046, No. 59-87450, No. 59-88730
Examples include reducing dye-releasing compounds described in Japanese Patent Application No. 59-123837, Japanese Patent No. 59-124329, Japanese Japanese Patent No. 59-165054, and Japanese Japanese Patent No. 59-164055.

Other negative dye-providing substances include, for example, U.S. Pat.
, No. 474,867, JP-A-59-12431, No. 5
No. 9-48765, No. 59-174834, No. 59-
No. 776642, No. 59-159159, No. 59-2
Examples include compounds that release coupling dyes as described in No. 31540 and the like.

Another particularly preferred negative dye-providing substance includes a coupling dye-forming compound represented by the following general formula (I).

General formula (I) Cp-6J 辷-6B) In the formula, Cp represents an organic group that can react with the oxidized form of the reducing agent (campling reaction) to form a diffusible dye, and J is The divalent bonding group B represents a ballast group. Here, the ballast group is a group that substantially prevents the dye-donating substance from diffusing during heat development, and may be a group that exhibits this effect depending on the nature of the molecule (such as a sulfo group), or a group that exhibits this effect depending on its size. (groups with a large number of carbon atoms, etc.)

The coupler residue represented by Cp preferably has a molecular weight of 700 or less, more preferably 500 or less, in order to improve the diffusibility of the dye formed.

The ballast group may preferably be a group having 8 or more carbon atoms, more preferably 12 or more carbon atoms, or a sulfo group, a group containing both is more preferred, and a group having a polymer chain is even more preferred.

The coupled dye-forming compound having a group as a polymer chain is preferably one having a polymer chain having a repeating unit derived from a monomer represented by general formula (n) as the group.

General formula (It) Cp - - ÷ J 辷廿Y汀 - 16L) In the formula, cp and J have the same meaning as defined in general formula (5), and Y is an alkylene group or an arylene group. or represents an aralkylene group, α represents 0 or l, Z represents a divalent organic group, and L represents an ethylenically unsaturated group or a group having an ethylenically unsaturated group.

Specific examples of coupling dye-forming compounds represented by general formulas (5) and (6) include JP-A-59-124339
No. 59-181345, No. 60-2950, No. 61-57943, No. 61-59336, U.S. Pat.
, 656.124, particularly U.S. Pat. Nos. 4,656,124 and 4,631°2.
Preferred are the polymeric dye-providing substances described in No. 51 and No. 4,650,748.

As a positive dye-donating substance, for example, JP-A-59-
55430, 5L165054, etc., for example, compounds that release diffusible dyes by intramolecular nucleophilic reaction as described in JP-A-59-154445, JP-A-59-766954, etc. is published in Japanese Patent Application Publication No. 59-11
Cobalt complex compounds described in JP-A-59-124327 and JP-A-59-152440, etc.
There are compounds that lose their ability to release dyes when they are oxidized, as described in the above.

In order to improve the diffusibility of the dye, the residue of the diffusible dye in the dye-donating substance used in the present invention preferably has a molecular weight of 800 or less, more preferably 600 or less; Examples include residues of azomethine dyes, anthraquinone dyes, naphthoquinone dyes, styryl dyes, 21-mouth dyes, quinoline dyes, carbonyl dyes, phthalocyanine dyes, and the like. These dye residues may be in a temporarily shortened form that can be copied during thermal development or transfer. In addition, these dye residues are used to improve the light resistance of images, for example, in Japanese Patent Application Laid-open Nos. 59-48765 and 50-
A preferable form is a dye residue capable of being Kill-I described in No. 1.24337.

The couplers 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 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 types. You can decide accordingly, but for example, the usage amount is 1
0.005 to 50 g per m2, preferably 0.1 g to
10g can be used.

The method of incorporating the coupler of the present invention into the photographic constituent layer of the heat-developable light-sensitive material is arbitrary. Cresyl phosphate, etc.) and then ultrasonically dispersed or dissolved in an alkaline aqueous solution (e.g., sthorium hydroxide).
0% aqueous solution, etc.) and then neutralized with an acid (e.g., citric acid or nitric acid, etc.), or used in a ball mill with an appropriate polymer aqueous solution (e.g., gelatin, polyvinyl butyral, polyvinyl pyrrolidone, etc.). It can be used after being dispersed.

Next, the photosensitive silver halide used in the present invention will be described. Any silver halide can be used, and examples include silver chloride, silver bromide, silver iodide, silver chlorobromide, silver chloroiodide, and silver iodobromide. The photosensitive silver λ lokenide can be prepared by any method commonly used in the photographic field, such as a single jet method. According to a preferred embodiment, silver halide emulsions having shelled silver halide grains can be used.

In the present invention, an emulsion containing grains having a multilayer structure in which the halogen composition of the grains differs on the surface and inside can be used. For example, a silver halide emulsion having core/shell type silver halide grains in which the halogen composition changes stepwise or continuously can be used.

In addition, its shape is cubic, spherical, octahedral, dodecahedron, 1
It can be used whether it has a clear crystal habit such as a tetrahedron or not. This type of silver halide is described in JP-A-60-215948.

Also, examples include JP-A-58-111933 and JP-A-58-111933. -1
No. 11934, No. 58-108526, Research Disclosure No. 22534, etc., have two parallel crystal planes, and each of these crystal planes is larger than the other single crystal of this particle. It is also possible to use a silver halide emulsion containing tabular silver halide grains having a large area and an aspect ratio, that is, a ratio of grain diameter to thickness of 5:1 or more.

Further, in the present invention, a silver halide emulsion containing internal latent image type silver halide grains whose surfaces have not been fogged in advance can be used. For internal latent image type silver halide whose surface is not prefogged, for example, US Pat.
No. 92,250, No. 3,206,313, No. 3,31
No. 7,322, No. 3,511,622, No. 3,447
, No. 927, No. 3,761,266, No. 3,703,
584, No. 3,736,140, etc., and the internal latent image type silver halide grains whose surfaces are not fogged in advance are as described in each of the above specifications.
These are silver halide grains in which the sensitivity inside the grain is higher than the sensitivity on the surface of the silver halide grain. Also, US Patent 3,2
No. 71.157, No. 3,447,927 and No. 3
, 531,291, or halogen containing dopants as described in U.S. Pat. No. 3,761,276. Silver halide emulsion with weakly chemically sensitized silver grain surfaces, or JP-A-1989-8
Silver halide emulsions comprising grains having a layered structure as described in JP-A No. 524 and JP-A No. 50-38525, etc., and other JP-A-52-156614 and JP-A-55-127
It is a silver halide emulsion described in No. 549.

The light-sensitive silver halide emulsion may be chemically sensitized by any method known in the photographic art.

The silver halide in the above-mentioned light-sensitive emulsion may be coarse grained or fine grained, and the grain size is preferably about 0.0 μm to about 1.5 μm, more preferably about 1.5 μm in diameter. Approximately 0. The former μm to 0.5 μm.

In the present invention, as another method for preparing silver halide for light-sensitive materials, a photosensitive silver salt-forming component described below may be allowed to coexist with the organic silver salt to form a photosensitive silver halide in a part of the organic silver salt. can.

These photosensitive silver halide and photosensitive silver salt forming components are
They can be used in combination in various ways, and the amount used is preferably 0.001 g to 50 g, more preferably 0.1 to 10 g per m2 of support per layer.

Typical spectral sensitizing dyes used in the present invention include, for example, cyanine, merocyanine, complex (that is, trinuclear or tetranuclear) cyanine, holobola-cyanine, styryl, hemicyanine, oxonol, and the like. .

The preferred amount of these sensitizing dyes added is lXl0-6 per mole of photosensitive silver halide or silver halide forming component.
mol to 1 mol. More preferably, l×IQ
, s -1x 10-' morte.

In the heat-developable 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 that can be used in the heat-developable photosensitive material of the present invention include JP-A Nos. 53-4921 and 49-5262.
No. 6, No. 52-141222, No. 53-36224, No. 53-37610, No. 53-37626, etc., and U.S. Patent No. 3,330.633, No. 3,794,4
Silver salts of long-chain aliphatic carboxylic acids and silver salts of carboxylic acids having heterocycles, such as silver laurate, silver myristate, palmidic acid, as described in No. 96, No. 4,105,451, etc. Silver, silver stearate, silver arachidonate, silver hehenate, α-(1-phenyltetrasolthio)
Silver acetate, silver aromatic carboxylates, such as silver benzoate, silver phthalate, etc., Japanese Patent Publication No. 44-26582, No. 45
-1.2700, No. 45-18416, No. 45-2
No. 2185, JP-A-52-137321, JP-A-58
-118638, 58-1.18639,
There are silver salts of imino groups described in US Pat. No. 4,123,274.

Other silver complex compounds with a stability constant of 4.5 to 10.0 as described in JP-A No. 52-31728, silver salts of imizolithion as described in U.S. Pat. No. 4,168,980, etc. is used.

Among the above organic silver salts, imino group silver salts are preferred;
Particularly preferred are silver salts of benzotriazole derivatives, more preferably 5-methylbenzotriazole and its derivatives, sulfobenzotriazole and its derivatives, and N-alkylsulfamoylbenzotriazole and its derivatives.

The organic silver salts used in the present invention may be used alone or in combination of two or more. Further, the silver salt may be prepared in a suitable indder and used as it is without isolation, or the isolated product may be dispersed in a binder by an appropriate means and used.

Dispersion means include, but are not limited to, ball mills, sand mills, colloid mills, vibration mills, and the like.

In addition, as a method for preparing organic silver salts, a method is generally used in which silver nitrate and a thick organic compound are dissolved and mixed in water or an organic solvent, but if necessary, a binder may be added or hydroxylated. It is also effective to add an alkali such as sodium to promote dissolution of the organic compound, or to use an ammoniacal silver nitrate solution.

The amount of the organic silver salt used is preferably 0.01 mol to 500 mol, more preferably 0.1 to 100 mol per mol of photosensitive silver halide. More preferably 0
．． It is 3 to 30 moles.

Reducing agent used in the photothermographic material of the present invention (reducing agent precursor is also included in the reducing agent herein)
Those commonly used in the field of heat-developable photosensitive materials can be used.

Examples of the reducing agent that can be used in the present invention include those described in U.S. Patent No. 3,531,286, U.S. Pat. ]-2146, same N
o, 15108, same No. 15127 and JP-A-1983-
No. 27132, U.S. Pat. No. 3,342,599, U.S. Patent No. 3,
719.492 specifications, JP-A-53-], 3562
p-phenylenediamine-based and p-aminephenol-based developing agents, phosphoramidophenol-based, sulfonamide aniline-based developing agents, and hydrazone-based color developing agents and their breaker, as described in No. 8, No. 57-79035, etc. or phenols, sulfonamide phenols, or polyhydroxybenzenes, naphthols, hydroquinhin-7tyls, methylene bisnaphthols, methylene hisphenols, ascorbic acid,
3-pyrazolidones and pyrazolones can be used.

As a particularly preferable reducing agent, JP-A-56-146133
N-(p-
N,N-dialkyl) phenylsulfamate.

Two or more kinds of the above-mentioned reducing agents may be used in combination.

The amount of the reducing agent used in the heat-developable photosensitive material of the present invention depends on the type of photosensitive silver halide used, the type of organic acid silver salt, the type of other additives, etc., and is not necessarily constant. However, the amount is usually preferably from 0.01 to 1,500 mol, more preferably from 0.1 to 200 mol, per mol of photosensitive silver halide.

Examples of binders that can be used in the heat-developable photosensitive material of the present invention include polyhinyl butyral, polyvinyl acetate,
Ethyl cellulose, polymethyl methacrylate-1, cellulose acetate butyrate, borihinyl alcohol,
These include synthetic or natural polymeric substances such as polyhinylpyrrolidone, gelatin, gelatin derivatives such as heptadated gelatin, cellulose derivatives, proteins, starch, and gum arahia, and one or more of these may be used in combination. can. In particular, it is preferable to combine seratin or its derivative with a hydrophilic polymer such as polyhinylpyrrolitone or polyvinyl alcohol, and more preferably gelatin and polyhinylpyrrolidone as described in JP-A-59-229556. By using mixed binders.

The preferred amount of binder used is usually 0.05 g to 50 g per m2 of support, more preferably 0.1 g.
g to 10 g.

In addition, the binder should be used in an amount of 0.1-
It is preferable to use 10g, more preferably 0.25
~4g.

The heat-developable photosensitive material of the present invention can be obtained by forming a photographic constituent layer on a support. Examples of the support that can be used here include polyethylene film, cellulose acetate film, polyethylene terephthalate film, Paper supports such as synthetic plus deck films such as polyvinyl chloride, photographic Kawahara paper, printing paper, baryta paper and resin coated paper, and furthermore, an electron beam curable resin composition is applied onto these supports and cured. Examples include supports such as

The heat-developable photosensitive material of the present invention, and when the photosensitive material is of a transfer type and uses an image receiving member, the photosensitive member of the heat-developable photosensitive material and/or
Alternatively, it is preferable that various heat solvents be added to the image receiving member. A thermal solvent is a compound that promotes thermal development and/or thermal transfer. Examples of these compounds include, for example, U.S. Pat. No. 3,347,675, U.S. Pat.
RD (Research Disclosure) No. 1
7643 (X11), JP-A No. 59-229556,
No. 59-68730, No. 59-84236, No. 60
-191251, 60-232547, 60-
No. 14241, No. 61-52643, patent application No. 61
No. 0-218768, No. 60-181965, No. 60-184637, etc., U.S. Patent No. 3,438,776,
3,666.477, 3,667.959 specifications, JP-A-51-19525, JP-A-53-24829
No. 53-60223, No. 58-118640,
5g-198038, as well as organic compounds having polarity such as those described in each publication, and those which are particularly useful in carrying out the present invention include urea derivatives (e.g., diethyl urea, diethyl urea, etc.). , phenylurea, etc.), amide derivatives (e.g., acetamide, benzamide, p-toluamide, p-butoxybenzamide, etc.)
, sulfonamide derivatives (e.g., hexanesulfonamide, α-toluenesulfonamide, etc.), polyhydric alcohols (e.g., 1,5-bentanediol, (pentaerythritol, 1-rimethylolethane, etc.), or polyethylene glycols.

As the above-mentioned thermal solvent, a water-insoluble solid thermal solvent is more preferably used. Here, water-insoluble solid thermal solvents are solid at room temperature or at high temperatures (60°C or higher, preferably 100°C or higher).
It is a compound that becomes liquid at temperatures above 130°C and below 250°C, and the inorganic/organic ratio ("Organic Concept Diagram °" by Yoshio Koda, Sankyo Publishing Co., Ltd., 198
4) is (1,5-3,0, preferably 0.7-2.5,
Particularly preferred are compounds in the range of 1.0 to 2.0.

Specific examples of the above-mentioned water-soluble heat solvent include, for example, JP-A-62
-136645, 62-139547, 63-
No. 53548, Japanese Patent Application No. 63-205228, No. 63-
No. 54113.

Examples of the layer to which a heat solvent is added include a photosensitive silver halide emulsion layer, an intermediate layer, a protective layer, an image receiving layer of an image receiving member, etc., and the heat solvent is added to each layer so as to obtain an effect depending on each layer.

The preferred amount of the heat solvent added is usually 10% to 500% by weight, more preferably 30% to 200% by weight of the binder amount.
Weight%.

The photothermographic material of the present invention may contain various additives in addition to the above-mentioned components, if necessary.

A color toning agent known in heat-developable light-sensitive materials may be added to the heat-developable light-sensitive material of the present invention as a development accelerator. As a color toning agent, for example, JP-A-46-49
No. 28, No. 46-6077, No. 49-5019, No. 50-2524, No. 50-67132, No. 50-6
No. 7641, No. 50-114.217, No. 52-33
No. 722, No. 52-99813, No. 53-1020, No. 53-55115, No. 53-76020, No. 5
3-1.25014, 54-156523, 5
No. 4-1565324, No. 54-156525, No. 5
No. 4-156526, No. 55-4060, No. 55-4
No. 061, No. 55-3201.5, etc. and West German Patent 2
．． 140.406, 2,141.063, 2,
No. 220,618, U.S. Patent No. 3,847,612, U.S. Patent No. 3,782,941, U.S. Pat.
No. 5, No. 58-1896328, No. 58-19354
There are compounds described in No. 1 etc.

Other development accelerators include compounds described in JP-A-59-177550 and JP-A-59-111636.

Furthermore, development accelerator-releasing compounds described in JP-A-61-159642 can also be used.

As an antifoggant, for example, U.S. Patent No. 3,645°7
Higher fatty acids described in No. 39, Special Publication No. 47-1]
Mercury salt described in No. 113, JP-A-51-47419
N-halogen compounds described in U.S. Pat. No. 3,700,
457, mercapto compound-releasing compounds described in JP-A No. 51-50725, arylsulfonic acids described in JP-A No. 49-125016, and lithium carboxylate salts described in JP-A No. 51-4741.9. The oxidizing agent described in British Patent No. L455,271 and JP-A-50-101019;
-19825, sulfinic acids or thiowaucyls described in No. 51. -81124, No. 55-93149
Disulfide and polysulfide compounds described in US Pat. No. 51-57435, rosins or diterpenes described in US Pat. No. 51-104338, polymer acids having free carboxyl groups or sulfonic acid groups as described in US Pat. , 1.2.4-triazole or 5-mercapl-1,2,4-)riazole described in JP-A-54-51821 and U.S. Pat. No. 4,137,079, Japanese Unexamined Patent Publication No. 55-14
1,2,3,4-thiatriazoles described in No. 2331, dihalogen compounds or trihalogen compounds described in No. 59-46641, No. 59-57233, and No. 59-57234, as well as No. 59-111636. Examples include thiol compounds described in Japanese Patent No. 60-198540, hydroquinone derivatives described in Japanese Patent No. 60-227255, and combinations of hydroquinone derivatives and benzotriazole derivatives.

Still another particularly preferred antifoggant is disclosed in JP-A No. 6
Inhibitor compounds having a hydrophilic group as described in JP-A No. 2-78554, polymer inhibitors as described in JP-A-62-121452, and inhibitor compounds having a ballast group as described in JP-A-62-123456. can be opened.

Furthermore, inorganic or organic bases or chlorine group precursors can be added. Examples of base precursors include compounds that decarbonize by heating and release basic substances (e.g., guanidinium/lichloroacetate), and compounds that decompose and release amines by reactions such as intramolecular nucleophilic substitution reactions. , for example, JP-A-56-1.3074
No. 5, No. 56-132332, British Patent No. 2,079,
No. 480, U.S. Patent No. 4,060,420, JP-A-59
-157637, 59-166943, 59-
No. 180537, No. 59-174830, No. 59-1
Examples include base release agents described in No. 95237 and the like.

In addition, various additives used in heat-developable photosensitive materials as necessary, such as antihalation dyes, optical brighteners, hardeners, antistatic agents, plasticizers, spreading agents, matting agents, and surfactants. , anti-fading agents, etc., specifically RD
(Research Disclosure) Magazine Vol.1.170.
June 1978 No. 17029, Patent Application 1986-27
It is described in No. 6615, etc.

52- The heat-developable photosensitive material of the present invention contains (a) a photosensitive silver halide, (1) a reducing agent, and (c) a pinter, and when used as a color photosensitive material, (d) a dye-providing substance. contains.

Furthermore, it is preferable to contain (e) organic silver as necessary. Basically, these may be contained in one heat-developable photosensitive layer, but they do not necessarily need to be contained in a single photographic constituent layer. For example, if the heat-developable photosensitive layer is divided into two layers, a), (b), (c).

The component (e) may be contained in one heat-developable photosensitive layer, and the dye-providing substance (d) may be contained in the other layer adjacent to this photosensitive layer, in a state where they can react with each other. If necessary, it may be contained in two or more constituent layers.

Further, the heat-developable photosensitive layer may be divided into two or more layers: a low-sensitivity layer and a high-sensitivity layer, a high-density layer and a low-density layer, or more.

The heat-developable photosensitive material of the present invention has two or more heat-developable photosensitive layers. In the case of full-color photosensitive materials,
Generally, it has three heat-developable photosensitive layers with different color sensitivities, and in each photosensitive layer, dyes with different hues are formed or released by heat development.

Usually, a yellow dye is used in the blue-sensitive layer, a magenta dye is used in the green-sensitive layer, and a cyan dye is used in the red-sensitive layer, but the invention is not limited to this. It is also possible to combine a near-infrared sensitive layer.

The structure of each layer can be arbitrarily selected depending on the purpose; for example, a structure in which a red-sensitive layer, a green-sensitive layer, and a blue-sensitive layer are sequentially formed on the support, or a structure in which a blue-sensitive layer is sequentially formed on the support. The composition may include a green-sensitive layer, a red-sensitive layer, or a green-sensitive layer, a red-sensitive layer, and a blue-sensitive layer on a support.

In addition to the heat-developable photosensitive layer, the heat-developable photosensitive material of the present invention can be provided with non-photosensitive layers such as an undercoat layer, an intermediate layer, a protective layer, a filter layer, a backing layer, and a release layer.

To coat the heat-developable photosensitive layer and these non-photosensitive layers on the support, a method similar to that used for coating and preparing general silver halide photosensitive material formats can be applied.

The heat-developable photosensitive material of the present invention usually preferably has a
0°C to 200°C1, more preferably 100°C-17
at a temperature range of 0°C, preferably for 1 second to 180 seconds,
More preferably, the image can be developed by simply heating for 1.5 seconds to 120 seconds. Transfer of the diffusible dye to the image-receiving layer may be carried out simultaneously with heat development by bringing the image-receiving member into close contact with the photosensitive surface of the photosensitive material and the image-receiving layer during heat development, or by bringing the image-receiving member into close contact with the image-receiving member after heat development. Alternatively, the transfer may be carried out by supplying water and then applying heat if necessary. Further, preheating may be performed in a temperature range of 70° C. to 180° C. before exposure. In addition, as described in Japanese Patent Application Laid-Open No. 60-143338 and Japanese Patent Application No. 60-3644, in order to improve mutual adhesion, the photosensitive material and image receiving member are heated at 80°C to 250° just before thermal development transfer. Each may be preheated at a temperature of C.

Various heating means can be used for the heat-developable photosensitive material of the present invention.

As the heating means, any method that can be applied 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, or passing through a high-temperature atmosphere. Alternatively, high-frequency heating may be used, or furthermore, a conductive layer containing a conductive substance such as a carbon blank may be provided on the back surface of the photosensitive material of the present invention or the back surface of the image receiving member for thermal transfer, and the Joule heat generated by energization may be utilized. You can also do that. There are no particular restrictions on the heating pattern, including methods of preheating and then reheating, or heating at high temperatures for a short period of time.
Alternatively, continuous rising, continuous falling, or repeating these at low temperatures for a long period of time, or even discontinuous heating, is possible, or a simple pattern is preferable. Alternatively, a method in which exposure and heating proceed simultaneously may be used.

Exposure light sources include various types such as tungsten lamps, halogen lamps, xenon lamps, mercury lamps, cathode ray flying spots, light emitting diodes, lasers (e.g. gas lasers, YAG lasers, dye lasers, semiconductor lasers, etc.), CRT light sources, and FOT. Items can be used singly or in combination. A semiconductor laser and a second harmonic generating element (SHG element) can also be used. In addition, exposure may be performed using light emitted from a phosphor excited by electron beams, X-rays, γ-rays, α-rays, or the like.

The exposure time is not only the 1/1000 second to 1 second exposure time normally used in cameras, but also the exposure time shorter than 1/1000 second,
For example, 1/10'~ using a xenon flashlight or cathode ray tube.
Exposures of 1/108 seconds can also be used. If necessary, the spectral composition of the light used for exposure can be adjusted using a color filter. The photosensitive material of the present invention can be used for scanner exposure using a laser or the like.

When the present invention is used as a transfer-type heat-developable photosensitive material, an image member is provided as described above. In this case, the image-receiving layer of the image-receiving member effectively used may have the function of receiving the dye in the heat-developable photosensitive layer released or formed by heat development, such as a tertiary amine or quaternary ammonium salt. Among the polymers described in U.S. Pat. No. 3,709,690, preferred are those described in US Pat. A typical image-receiving layer for diffusion transfer is obtained by mixing a polymer containing ammonium salt, tertiary amine, etc. with gelatin, polyhinyl alcohol, etc., and coating the mixture on a support.

Another useful dye-receiving material is JP-A-57-207
Examples include those made of a heat-resistant organic polymer substance with a glass transition temperature of 40°C or more and 250°C or less, as described in No. 250 and the like.

These polymers may be supported on a support as an image-receiving layer, or may themselves be used as a support.

Examples of the heat-resistant polymer substances include polystyrene, polystyrene derivatives having a substituent having 4 or less carbon atoms, polyhinylcyclohexane, polydivinylbenzene, polyvinylpyrrolidone, polyhinylcarbazole, polyallylbenzene, and Polyacetals such as vinyl alcohol, polyhinyl formal, and polyvinyl butyral, polyvinyl chloride, chlorinated polyethylene, polytrichloride fluoroethylene, polyacrylonitrile, polyN, N-
Dimethylallylamide, polyacrylate with p-cyanophenyl group, pentachlorophenyl group and 2,4-dichlorophenyl group], polyacryl chloroacrylate, polymethyl methacrylate, polyprol methacrylate, polypropyl methacrylate-1, polyisopropyl methacrylate-1-, polyisobutyl methacrylate,
Polyesters such as polytert-butyl methacrylate-1, polycyclohexyl methacrylate-1, polyethylene glycol dimethacrylate], poly-2-cyano-ethyl methacrylate-1, polyethylene terephthalate, polysulfone, Polycarbonates such as bisphenol A polycarbonate, polyanhydride,
Examples include polyamides and cellulose acetates. Also, ``Polymer Handbook, Second Edition'' (edited by Joy Brandrup and E.H. Inmercut), published by John Williant Zance Publishing (
Polymer t(andbook 2nd ed
, (J.

Brandrup, E. H. Immergut (eds.)
Also useful are synthetic polymers having a glass transition temperature of 540°C or higher, as described in Jobn Wiley & 5onsl. Generally, the molecular weight of the polymer substance is usefully between 2,000 and 200,000. These polymeric substances may be used alone or in a blend of two or more thereof, or may be used in combination of two or more as a copolymer.

A particularly preferable image-receiving layer is JP-A-59-22342
Layer made of polyvinyl chloride described in No. 5 and JP-A-60
Examples include a layer made of polycarbonate and a plasticizer described in Japanese Patent No. 19138.

These polymers can also be used as a support and an image-receiving layer (image-receiving member), in which case the support may be formed from a single layer or from multiple layers. Good too.

Any support such as a transparent support or an opaque support may be used as the support for the image receiving member, but examples include polyethylene terephthalate-1, polycarbonate-1, polystyrene, polyvinyl chloride, polyethylene , films such as polypropylene, and these supports contain titanium oxygen, barium sulfate,
A support containing pigments such as carbonate, talc, etc.
RC paper, cloth, glass, metals such as aluminum, etc. laminated with thermoplastic resin containing pigment on baryta low paper, and electron beam curing containing pigment on these supports. Examples include a support coated with a synthetic resinous tissue and cured, and a support coated with a pigment-containing coating layer on the support. Furthermore, cast coated paper described in Japanese Patent Application No. 126972/1984 is also useful as a support.

In addition, a support having an electron beam curable resin composition containing a pigment coated and cured on paper, or a support having a pigment coating layer on paper and an electron beam curable resin composition biological material on the pigment coating layer. The resin layer of the support coated with and cured can be used as an image-receiving layer, so it can be used as is as an image-receiving member.

The heat-developable photosensitive material of the present invention is disclosed in RD (Research Disclosure) No. 15108, JP-A-5'7-198.
No. 458, No. 57-207250, No. 61-8014
The photothermographic material may be a so-called mono-one type photothermographic material in which a photosensitive layer and an image-receiving layer are formed on the same support, as described in No. 8.

Various known additives can be added to the image-receiving material of the present invention. Examples of such additives include, for example, ultraviolet absorbers, image stabilizers, development accelerators, antifoggants, p.
Mention may be made of H regulators (various acids and acid precursors or bases and base precursors, etc.) and thermal solvents.

Typical examples of the ultraviolet absorber include benzotriazole compounds and benzophenone compounds. Examples of image stabilizers include hindered amine-based, hindered phenol-based, dialkoxybenzene-based, chroman-based, indane-based, thioether-based, hydroquinone-based, chloro-substituted s-triazine-based compounds, etc. can.

The development accelerator and antifoggant may be appropriately selected from compounds added to photothermographic materials.

The heat-developable photosensitive material of the present invention is preferably provided with a protective layer.

Various additives used in the photographic field can be used in the protective layer. These additives include various matting agents, colloidal silica, slipping agents, organic fluoro compounds (especially fluorine surfactants), antistatic agents, ultraviolet absorbers,
High-boiling organic solvents, antioxidants, hydroquinone derivatives,
Examples include polymer latinx, surfactants (including polymeric surfactants), hardeners (including polymeric hardeners), organic silver salt particles, and non-photosensitive silver halide particles.

Regarding these additives, please refer to RD (Research Disclosure Magazine) Vol. 170. June 1978 No.
, No. 17029, Japanese Patent Application No. 60-2766], No. 5.

〔Example〕

Hereinafter, specific examples of the present invention will be described. However, as a matter of course, the present invention is not limited to the examples described below.

Example 1 In this example, a silver iodobromide emulsion, a dispersion of an organic silver salt and a heat solvent, a dye-providing substance dispersion, and a reducing agent dispersion were prepared as follows, and these were used to heat the A developable color photosensitive material was prepared. In addition, an image-receiving material was prepared as described below.

■Preparation of silver iodobromide emulsion At 50°C, JP-A No. 57-92523, No. 57
Using the mixing agitator shown in the specification of -92524,
Add 11.6 g of potassium iodide to solution (A) in which 20 g of ossein gelatin, 100,100 O of distilled water, and ammonia are dissolved.
500 mQ of solution (B), which is an aqueous solution containing g and 131 g of potassium bromide, and 500 mQ of solution (C), which is an aqueous solution containing 1 mole of silver nitrate and ammonia. Added while maintaining.

The shape and size of the emulsion grains to be prepared were adjusted by controlling pHlrlAg and the addition rates of solutions (B) and (C). In this way, a core emulsion with a silver iodide content of 7 mol %, regular octahedral grains, and an average grain size of 0.25 μm was prepared.

Next, a core/shell type silver halide emulsion with a regular octahedral shape and an average grain size of 0.3 μm was prepared by coating a silver halide shell with a silver iodide content of 1 mol % in the same manner as above. (monodispersity was 9%). The emulsion thus prepared was washed with water and desalted.

■Preparation of photosensitive silver halide dispersion The following components were added to 700 m4 of the silver iodobromide emulsion prepared as described above, and chemical sensitization and spectral sensitization were carried out. Each photosensitive silver halide emulsion dispersion was prepared.

(a) Preparation of red-sensitive silver iodobromide emulsion The above silver iodobromide emulsion 700mff4
-Hydroxy-6-methyl-1゜3.3a,7-chitrazaindene 0.4 g Gelatin 32 g Sodium thiosulfate 10 mg The following sensitizing dye (a) 1% methanol solution 80 mQ steamed water
1200 m (2 sensitizing dyes (a
) (b) Preparation of green-sensitive silver iodobromide emulsion The above silver iodobromide emulsion 700m44-
Hydroxy-6-methyl-1゜3.3a,7-te1herazyden 0.4g
Gelatin 32 g Sodium thiosulfate 10 mg Sensitizing dye below (b) 1% methanol solution 80 mρ Steamed water
1200 mQ sensitizing dye (b
) (c) Preparation of blue-sensitive silver iodobromide emulsion The above silver iodobromide emulsion 700m124
-Hydroxy-6-methyl-1゜3.3a,7-titrazyden 0.4 g Seratin 32 g Sourium thiosulfate 10 mg Sensitizing dye below (c) 1% methanol solution 80 mffff Water 1200 mQ sensitizing dye (c
) Dispersion of organic silver and thermal solvent A dispersion of organic silver salt and thermal solvent was prepared based on the following treatment.

Prescription benzotriazole silver 60.5g Heat solvent-A (below) 346
g Polyhinylpyrrolidone (10%) 44
2000g in 6mQ water
shall be.

After dispersing in an alumina ball mill, the po was adjusted to 5.5 with a 10% citric acid aqueous solution, and an organic silver salt and a hot melting solvent were mixed.
A ■Preparation of dispersion of compound C-2 of the present invention Compound C-22
9.8 g of the following inhibitor -BO, 0.24 g and the following scavenger (C) 3.6 g were mixed with 15 g of tricresyl phosphate and 100 m of ethyl acetate. 160ml of 5% by weight aqueous alkanol XC solution. A gelatin aqueous solution of 360 mα containing 36 g of photographic gelatin was mixed, dispersed with an ultrasonic homogenizer, and ethyl acetate was distilled off. A dispersion of a binding dye-providing substance was obtained.

Inhibitor - (B) Scavenger = (C) ■
Preparation of Photosensitive Material-1 Using the above dispersion, each composition was coated on a 180 μm thick transparent polyethylene terephthalate film coated with a latex undercoat in the following amount per 1 m2 of support, and dried. Photosensitive material-1 was produced.

Compound (C) 0.646g Silver benzotriazole 1.0g Red-sensitive silver halide (Ag equivalent) 0.4g Gelatin
2.8g polyvinylpyrrolidone 0.2
gHeat solvent-A 4.5g inhibitor-
B 0.7mg tricresyl phosphate 0.65g Reducing agent precursor (D) (below) 0.6g Suno J
Venger (C) 0.08g Reducing agent precursor (D) is a mixture of each dispersion and reducing agent precursor (D) ■Preparation of image-receiving material On photographic baryta paper, a polyvinyl chloride layer (image-receiving layer) containing the following compound is added. An image-receiving material was prepared by coating the film. In addition,
The amount of polyvinyl chloride applied was 12 g per m2 of support.

Cθ The obtained photosensitive material-1 was exposed to 800 CMS through a stamp wedge, the image receiving materials were superimposed, and heat development was performed at 150° C. for 10 seconds.

After thermal development, the image-receiving material was peeled off to obtain a cyan transferred image.

The maximum density and minimum density (fog) of the obtained image-1 are shown in Table-1.

Photosensitive materials-2 to 14 were prepared in the same manner as photosensitive material 1, except that the couplers of the present invention and comparative couplers (1°2) shown in Table 1 were used as the couplers of photosensitive material-1 prepared above. In photosensitive materials 13 and 14 using comparative couplers, the amount of silver and reducing agent added is twice that of other photosensitive materials, and the amount of gelatin is 3.8glI- Comparative coupler (1) OOH Comparison Coupler (2) C■.

Photosensitive materials-2 to 14 were also subjected to wedge exposure and thermal development in exactly the same manner as photosensitive material-1. The results are shown in Table 1. As shown in Table 1, photosensitive material 1-10 using the coupler of the present invention provides a cyan image with high maximum density and low fog, while comparative couplers (1) and (2) Since the molar absorption coefficient of the dye formed is lower than that of the coupler of the present invention, images of sufficient density can be obtained with the same amounts of coupler, silver, and reducing agent, as shown in Photosensitive Materials 11 and 12. I can't.

Furthermore, since the image obtained using the light-sensitive material of the present invention has excellent dye absorption characteristics, it was possible to obtain a cyan image that was clearer than the cyan image obtained using the comparative light-sensitive material.

Example 2 A multilayer photosensitive material 15 having the structure shown in Table 2 was produced. In addition, as a comparative photosensitive material, the coupler of the present invention in the 6th layer of Photosensitive Material-15 was used as Comparative Coupler (2) (applied amount: 0.8
3g/m2) Photosensitive 4 dye-15 yellow filter dye (F-1) SO3H Polymer dye-donor substance (1) H3 □ Polymer dye-donor substance (2) 〒H3 To the obtained photosensitive material Exposure to blue light, green light, and red light was applied through a step wedge.

Example-1 for exposed photosensitive materials-15 and 16
Thermal development was carried out in the same manner as described above, and cyan, magenta and yellow transferred images were obtained for each exposure light. Table 3 shows the maximum density and minimum density of the obtained transferred image.

As shown in Table 3, photosensitive material-15 using the coupler of the present invention gives good images (high Dmax and low Dmin) in cyan, magenta, and yellow, but comparative photosensitive material-16 gives high density cyan images. Can't get image.

In addition, to evaluate color reproducibility, exposure to blue light and green light,
After exposing photosensitive materials-15 and 16 to blue light and red light, the same heat development as above was carried out to obtain blue and green transferred images, respectively. The image obtained with photosensitive material-15 is
It was found that it had excellent color reproducibility, especially in cyan, green, and blue, compared to the image obtained with Comparative Photosensitive Material-16.

Claims (1)

[Scope of Claims] A heat-developable color photosensitive material comprising at least a photosensitive silver halide, a reducing agent, a binder, and a cyan dye-forming coupler represented by the following general formula (1) on a support. General formula (1) ▲There are mathematical formulas, chemical formulas, tables, etc.▼ [In the formula, R represents a group with a value of Hammett's substituent constant σp of 0.3 or more, and represents a group that can be separated by a coupling reaction, and Y represents a group of nonmetallic atoms necessary to form a nitrogen-containing heterocycle. ]