JPS60133449A - Heat developable color photosensitive material - Google Patents

Abstract

PURPOSE:To prevent color turbidity and to improve the transferability of a diffusible dye released from the bottom recording layer by interposing practically nonphotosensitive intermediate layers each contg. a coupler capable of forming a passive compound by a reaction with the oxidized product of a developing agent between two photosensitive layers. CONSTITUTION:Yellow, magenta and cyan couplers for internal color development are used as couplers each capable of forming a passive compound by a reaction with the oxidized product of a developing agent. Each of the couplers has an aryl group having <=8C alkyl and/or >=4C alkyl and a hydrophilic group such as sulfo, carboxyl of sulfamoyl at positions except the active site so as to form said compound. The amount of the coupler used in each intermediate layer is 1X10<-9>-1X10<-4>mol, preferably 1X10<-7>-1X10<-5>mol per 100cm<2> photosensitive material. The thickness of the intermediate layer is 0.01-5mum, preferably 0.1- 5mum on the dry basis.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a heat-developable color light-sensitive material, and more specifically, a multilayer heat-developable color diffusion transfer material with improved color turbidity and improved dye transferability from the bottom layer. -W-Old House■口與十 21- [Prior art] The conventionally known color photography method using photosensitive silver halide has some disadvantages in terms of photosensitivity, gradation, image preservation, etc. Power 2 - Superior to photography and has been the most widely put into practical use. However, in this method, wet processing is used for steps such as development, bleaching, fixing, and washing, which takes time and effort, and there are still concerns about pollution to the human body due to processing chemicals, and There are many problems, such as concerns about contamination of workers by treatment chemicals, and the time and cost of waste liquid treatment.

Therefore, there has been a demand for the development of a method for forming color images that allows dry processing.

Heat-developable black-and-white photosensitive materials characterized in that the development process is carried out by heat treatment have been known for a long time.
No. 4921 and No. 43-4924 disclose a light-sensitive material consisting of an organic silver salt, silver halide, and a developer. Many heat-developable color photosensitive materials are also known.

For example, U.S. Patent Nos. 3,531,286 and 3,761.
, No. 270, No. 3.764, 328, Research Disclosure Nα15108, Nα15127, N
α12044 and Nch 16479, etc., contain photographic couplers and color developing agents in heat-developable photosensitive materials, and are disclosed in U.S. Patent No. 3,180,731, Research Disclosure N (113443 and
(For L14347 etc., for those using leuco dye, U.S. Patent No. 4,235.957, Research Disclosure Nα14433. Same No. 1444B, Same No.
, 15227, Nα15776, N111813
No. 7 and U.S. Pat. Each method of thermal bleaching is described.

However, these proposals regarding heat-developable color photosensitive materials have shown that it is difficult or even impossible to fix the black, white, and silver images formed at the same time without bleaching, or even if it is possible, it is difficult to fix the black, white, and silver images. It is what you need. Therefore, these proposals are not found to be desirable, as it is difficult to obtain clear color images, and complicated post-processing is required.

On the other hand, a heat-developable light-sensitive material was developed in which a diffusible dye released by heat development is transferred to form an image.
No. 179840, No. 57-186744, No. 57-1
No. 98458, No. 57-207250, No. 58-40
551 and No. 58-58543, and also in the specifications of Japanese Patent Application No. 57-122596 and No. 57-229649 filed by the present inventors.

In these proposals, a dye-donating substance containing a diffusible dye in the same molecule releases the diffusible dye through a heat development reaction of an organic silver salt, and transfers the diffusible dye to a receiving layer to obtain a color image. In this specification, this is referred to as a "dye-releasing type."

On the other hand, patent application No. 57-229671 by the present inventors
No. 58-3336: (No. 58-33364) The proposal shown in each specification is that a colorless or light-colored dye-providing substance is formed by oxidation of a color developing agent produced by a thermal reaction of an organic priming salt. body and anti-LE, forming a thermodiffusible pigment,
A color image is obtained by transferring to an image-receiving layer, and is referred to herein as a "dye-forming type".

Inquiry about the Bq formula of such dye-releasing type, pigment-forming type, etc.
When it is desired to create a multicolor image (j) on one receiving layer by spray transfer of dyes using heat without the need for wet processing, it is generally convenient to use a photosensitive material with a multilayer structure. be. It is well known that a multilayer structure is used even in the case of general color sensitive materials that require normal wet processing. For example, if the printed photosensitive material is taken as I'11, the color bean-
In this case, a blue sensitive layer containing a yellow coupler, a green 11& layer containing a magenta coupler, and a red sensitive layer containing a cyan coupler are usually formed in this order from the bottom IN#. In the case of Eftaflex, the bottom layer is a red-sensitive layer that provides cyan dye, then a layer that applies magenta dye, and a blue-sensitive layer that applies magenta dye. An intermediate layer is coated between each layer to prevent color turbidity, and in most cases, a layer of yellow filter is coated between the blue-sensitive layer and the green-sensitive layer.

On the other hand, in order to achieve full color in heat-developable color photosensitive materials, it is important to prevent color turbidity between each layer as described above, and an intermediate layer is usually provided between the blue-sensitive layer, green-sensitive layer, and red-sensitive layer. By doing so, it is possible to suppress color turbidity.

However, in order to suppress color turbidity, an intermediate layer is provided and the film thickness is particularly increased, and a binder (such as gelatin) that acts non-diffusively on the dye-providing substance and the oxidant (Dr') of the main developing system is used. If the amount of the dye is increased, there is a problem that the transferability of the released or formed diffusible dye to the image-receiving layer decreases. In particular, the transferability of the diffusible dye from the photosensitive layer closest to the support (lowermost photosensitive layer) is significantly reduced and shattered.

Unfortunately, in conventional photographic methods using photosensitive materials, there are known techniques that use hydroquinones, catechols, etc. to prevent color turbidity, but these techniques can be combined with heat development color photosensitive materials. When used as a material, there are the following problems. That is, for example, alkylhydroquinones, such as those used in conventional silver halide emulsions, are strong reducing agents and have diffusivity in heat-developable color photosensitive materials, so they do not act as developers. 1
Photo: jG q'8r There is a problem in that it is unfavorable due to its characteristics.

Therefore, in heat-developable color photosensitive materials, it is necessary to prevent color turbidity without using these compounds.
No effective method is known yet.

[Object of the Invention] An object of the present invention is to provide a heat-developable color photosensitive material that can prevent color turbidity and has improved transferability of diffusible dyes from the lowermost photosensitive layer.

[Structure of the invention]

As a result of intensive research to achieve the above object, the inventors of the present invention have discovered that the present invention contains a photosensitive silver halide, an organic silver salt, a dye-donating substance capable of releasing or forming a diffusible dye upon thermal development, a reducing agent, and a binder. , at least two photosensitive layers in which the color sensitivity of the photosensitive silver halide and the hue of the dye are different from each other;
In a heat-developable color photosensitive material having j on a support,
Between the two photosensitive layers, there is provided a substantially non-photosensitive intermediate layer containing at least one compound selected from the group consisting of 2-2-2-2-2-2-2-1, which is capable of reacting with an oxidized form of a developing agent to form an immobile compound. It has been found that the above purpose can be achieved by
The invention has been completed.

The present invention will be explained in detail below.

In the present invention, a coupler (hereinafter referred to as the coupler of the present invention) capable of reacting with an oxidized form of a developing agent to form an immobile compound is used for internal color formation used in a conventional color silver salt method. Yellow, magenta and 7 uncouplers are used, for example, active methylene compounds such as open chain ketomethine compounds, pyrazolone compounds and pyrazolone triazole compounds, active methylene compounds such as phenol or naphthol derivatives, or leaving groups in the active sites of these compounds. The so-called 2-hit (
Co., Ltd.) coupler is used. The above couplers are aryl compounds having an alkyl group of 8 or more carbon atoms and/or an alkyl group of 4 or more carbon atoms at a site other than the active site substituent because they can react with the oxidized form of a developing agent to form an immobile compound. In addition to the group, it has a residual aqueous group such as a sulfo group, a carboxyl group, or a sulfamoyl group.

The above coupler can be represented by the following general formula.

General formula [1] H ! 几4 General formula l'　　　　　,,000tlOO㇠.

General formula ■ Formula formula 3.几2. It32 and Rin. is a hydrogen atom, a halogen atom (preferably a fluorine atom, a chlorine atom or a bromine atom), an alkyl group having 1 to 22 carbon atoms, an alkoxy group,
Aryl group, amine group, alkylamino group, arylamino group, alkylamido group, arylamide group, alkylsulfonamide group, arylsulfonamide group, alkylcarbamoyl, arylcarbamoyl group, alkylcarbamoylamide group, arylcarbamoylamide group, Represents a cyan group or a nitro group, or 2 and 2 may be combined to form a 5- to 6-membered carbocyclic or heterocyclic ring (preferably a nanthor ring formed by condensation with a phenol ring) .

几represents an aryl group, preferably a phenyl group, such as an alkyl group, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an aralkyl group, an acyl group,
Substitution selected from ananolamino group, alkoxy group, argyl group, aryloxyalkyl group, N-substituted carbamoyl group, alkylamino group, arylamino group, halogen atom, acylox7 group, acyloxyalkyl group, or kemacyan group represents an aryl group (preferably a phenyl group) substituted with a group.

Natsumo 5 is hydrogen atom, halogen atom, alkyl group, cycloalkyl group, aryl group, alkoxy group, aryloxy group, aralkyl group, acylamino group, terkoxyalkyl group, aryloxyalkyl group, N-substituted carbamoyl group, alkyl group Represents a substituent selected from an amino group, an arylamino group, an acyloxy group, an acyloxyalkyl group, or a cyan group, and these substituents further include a hydroxyl group, a carboxyl group, a sulfo group, a cyano group, a nitro group, a sulfamoyl group, It may be substituted with an N-substituted carbamoyl group, ananolamino group, an alkylsulfonylamino group, an arylsulfonylamino group, an alkyl group, an aryl group, an alkoxy group, an arylox group, an aralkyl group, or an acyl group.

Note that at least one of R, ~■t6 is a sulfo group or 1
1. It must be 11-substituted with a carboxyl group.

X is a hydrogen atom, a halogen atom, or a group that camps with and leaves the oxidized form of a developing agent, such as a sulfo group, an alkokene group, an aryloxy group, an anolamino group, an acyloxy group, an alkylsulfonyloxy group, an arylsulfonyloxy group, Alkylsulfonylamino group, 7!
I-Rusulfonylamino group, alkylthio group, arylthio group, these substituents can further be hydroxyl group, carboxyl group, sulfo group, cyano group, nitro group, sulfamoyl group, N-substituted sulfamoyl group, carbamoyl group, N-
IR substituted carbamoyl group, acylamino group, alkylsulfonylamino group, arylsulfonylamino group, alkyl group, aryl group, alkoxy group, aryloxy group,
It may be substituted with an aralkyl group, an acyl group, etc.

Specific examples of couplers used in the present invention are shown below,
Not limited to these.

[Exemplary compounds]

δ(J3Na (4) 0. ,H37 H1 (6) O>5H3y I11 (a) 011 " oo11 UOOOH 03H (I3 H 8O3N a oott UOOH2ON 5o3Na (B) OH2000H (c) (t)O4hi.

02NH2 013f437 O3H 03Na 00H 00H □ C18' 37 The amount of the coupler used in the present invention is determined by the amount of the photosensitive material lO in each intermediate layer.
Oa+1 per lXl0-9 mo# ~ lXl0-' mole,
Preferably, the amount is in the range of 1×1 F7 mol to 1×10 −5 mol.

As the addition method, methods similar to those for the dye-providing substance used in the present invention, such as 6 mil dispersion, protect dispersion, and Fischer dispersion, as described later, are used.

The heat-developable color photosensitive material of the present invention has a multilayer structure,
For example, the following (1), (2), (3), (4) and (5)
It is preferable that each layer is coated on a support.

(1) Red-sensitive layer consisting of red-sensitive silver halide, organic silver salt, reducing agent, binder and cyan dye-providing substance (2) Intermediate layer containing the coupler of the present invention (1) (3) Green-sensitive...logenization A green-sensitive layer (4) consisting of silver, an organic silver salt, a reducing agent, a binder, and a magenta dye-providing substance; (2) an intermediate layer containing the coupler of the present invention; The photosensitive layer in the present invention includes a blue-sensitive layer consisting of a blue-sensitive silver halide, an organic silver salt, a reducing agent, a binder, and a yellow dye-providing substance. consisting of at least two layers in which the color sensitivity of the photosensitive silver halide and the hue of the dye are different from each other,
The photosensitive material of the present invention can be obtained by providing the intermediate layer containing the turnip 2- of the present invention between the #2 layers, and the intermediate layer of the present invention having a three-layer structure as described above. is preferably provided.

By containing the coupler of the present invention in the intermediate layer as described above, when the oxidized form of the developing agent (DP') moves from the lowest red-sensitive layer to the intermediate layer (+), the oxidized form of the developing agent (Dr') to produce an immobile compound,
Since it is non-diffusible, the oxidized form of the developing agent (DP') does not affect the coupler in the green-sensitive layer on the upper layer of the intermediate layer (1), and the diffusible dye produced in the red-sensitive layer It does not affect the amplification of the image receiving layer. Therefore, the following Mei hi! As is clear from example i (there is no difference in color, and the intermediate layer is not the same as the conventional one), it is possible to prevent color blurring without having to reduce the color by 1, and the transfer of the dye from the bottom layer is improved. be.

In addition to the coupler of the present invention, filter dye (blue cut dye),
Various additives such as hardeners, spreading agents, and hot solvents can be added.

The intermediate layer of the present invention has a dry thickness of 0.01 μm.
It is preferably 0.1 μm to 5 μm, more preferably 0.1 μm to 5 μm.

The dye-providing substance used in the photosensitive layer of the present invention is a compound that releases or forms a diffusible dye upon thermal development.

The term "diffusivity" as used herein refers to the property that the dye released or formed from the dye-donating substance can migrate from the layer containing the dye-donating substance to an adjacent layer in the stacked layer; Depending on the mode of transfer, this diffusivity ('based on the above-mentioned transfer may occur), for example, the formed dye may be dissolved in the dye solvent, or This includes cases in which the dye is transferred by being heated and melted by a hot solvent lIc.Furthermore, there is also a mode in which the formed dye itself is sublimable, and the formed dye moves to an adjacent layer by sublimation 1. Includes 1.

Here, ``sublimation property'' refers not only to the commonly used property of changing from a solid to a gas without passing through the liquid state, but also the property of melting a solid to become a liquid, and then changing from this liquid to a gas. It also includes.

Examples of dye-providing substances that can be used in the thermal phenomenon color photosensitive material of the present invention include those disclosed in Japanese Patent Application Laid-Open No. 57-17984.
No. 0, No. 57-] No. 86744, No. 5B-116537
No. 58-123533, No. 57-149046, Japanese Patent Application No. 57-122596, No. 57-160698
No. 57-205447, No. 57-224883, No. 57-229647, No. 57-225929, No. (3) 58-33363, No. 58-33364
A dye-providing substance that can be used in the diffusion transfer type heat-developable photosensitive material described in No. 58-34083 and the like is disclosed.

The dye-providing substance preferably used in the present invention is a dye-forming substance, and includes, for example, the substances shown below.

[Exemplary dye-donor substance] (4) (1) 0H (2) OH 03Il N110C[1C161133 1 OH f~He (UIC, 61133 1 ” ct Nl (OoHO, 6H33 1) The above dye-donor substance used in the present invention is: Although it varies depending on the photothermographic composition, coating conditions, processing method, etc., it is generally used in a range of 0.01 mol to 10 mol, preferably 0.1 mol to 20 mol, per 1 mol of organic silver salt.

In order to incorporate the dye-providing substance used in the present invention into the heat-developable photosensitive layer of the heat-developable color light-sensitive material, it is possible to incorporate the dye-providing substance into the heat-developable light-sensitive layer of the heat-developable color light-sensitive material by using a high-boiling-point method, for example, as described in U.S. Pat. It can be dissolved and contained in a solvent. Further, in the dispersion method as described above, the dye-providing substance can be dissolved and contained in the heat-developable photosensitive layer by using a low boiling point solvent in combination with the high boiling point solvent as required.

Examples of the above-mentioned high boiling point solvent include di-n-butyl phthalate, tricresyl phosphate, di-octyl phthalate, n-nonylphenol, etc., and examples of the low boiling point solvent include methyl acetate, butyl propionate,
Known examples include cyclohexanol and diethylene glycol monoacetate. These solvents may be used alone or in combination, and the dye-donating substance dissolved in the solvent may be anionic surfactants such as alkylbenzenesulfonic acids and alkylnaphthalenesulfonic acids and/or sorbitan. It can be mixed with an aqueous solution containing a hydrophilic binder such as gelatin containing a nonionic surfactant such as a monolauric acid ester, emulsified and dispersed using a colloid mill or an ultrasonic dispersion device, and added to the heat-developable photosensitive layer.

The above-mentioned high boiling point solvent is used in an amount that completely dissolves the dye donor, but preferably in an amount of 0.05 to 100 parts based on 1 part y of the dye donor.

A preferable dispersion method other than the above is Fischer dispersion. Fischer dispersion refers to dissolving and dispersing a dye-providing substance having a hydrophilic component and a hydrophobic component in the same molecule in an aqueous alkaline solution. For this dissolution and dispersion, an organic solvent compatible with water may be added, heating and stirring (homogenizer, ultrasonic dispersion, etc.) may be used, or the aid of a surfactant may be used. As the alkali in the alkaline aqueous solution, an inorganic base or an organic base compatible with water can be used, and after dissolving and dispersing the dye-providing substance, the pH can be adjusted as necessary. An organic or inorganic acid that is compatible with water can be used as a pH adjuster in the case of keratin. The surfactant as a dispersion aid may be an anionic or nonionic surfactant, but anionic surfactants are preferred.

In addition, the above-mentioned 1 liter of Finonya is also called Agefer dispersion, and is disclosed in British Patent No. 45,555 and British Patent No. 4.
The technical content described in No. 65.823, No. 29.897, etc. can be referred to.

The heat-developable photosensitive layer of the present invention contains photosensitive silver halide in addition to the dye-providing substance described above.

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 and mixtures thereof. The photosensitive silver halide can be prepared by any method known in the photographic field, such as a single jet method or a double jet method, but in the present invention, a conventional method for preparing a silver halide gelatin emulsion is used. A light-sensitive silver halide emulsion prepared according to the method 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 such as gold sensitization, sulfur sensitization, gold-sulfur sensitization, and reduction sensitization.

The silver halide in the above-mentioned photosensitive emulsion may have coarse or fine grains, but the preferred grain size is about 1.5 μm to about 0.001 μm, more preferably about 0.01 μm to about 0.001 μm. .5 μm to about 0.01 μm.

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

In the present invention, as another method for preparing photosensitive silver halide, a photosensitive silver salt-forming component may be allowed to coexist with an organic silver salt to form photosensitive silver halide in a portion 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 11 atoms, NH4 group or metal atom, and X represents 01, Br). or engineering, n is M
When is an H atom or an NH4 group, it is l, and when M is a metal atom, it is the valence.

Metal atoms include lithium, sodium, potassium,
Rubidium, cesium, copper, gold, beryllium, magnesium, calcium, strontium, barium, zinc,
Cadmium, mercury, aluminum, indium, lanthanum, ruthenium, thallium, kermanium, tin, lead, antimony, bismuth, chromium, molybdenum, tungsten, manganese, rhenium, iron, cobalt, nickel, rhodium, palladium, osmium, iridium, platinum,
ψ such as cerium, halogen-containing metal complexes (for example, 2PtC46, 2PtBr6.) (AuCl3゜(NH4)21rOA6 + (NH4)3IrOt6
1 (NH4)2㇠uO26゜(NH4)a㇠uot6
, (NH4)a几hO16, (NF14)3RhBr
6), onium halides (e.g., tetramethylammonium bromide, trimethylphenylammonium bromide, cetylethyldimethylammonium bromide, 3-methylthiazolium bromide, trimethylbenzylammonium bromide, quaternary ammonium halides such as tetramethylammonium bromide, trimethylphenylammonium bromide, tetramethylammonium bromide, tetramethylbenzyl ammonium bromide, etc.), Osphonicum promide, quaternary phosphonium halides, benzylethyl methyl bromide, tertiary sulfonium halides such as l-ethylthiazolium bromide, etc.), halogenated hydrocarbons (e.g. iodoform, bromoform carbon tetrabromide, etc.) , 2-bromo-2-methylpropane, etc.), N-halogen compounds (N-chloroconophosphate, N-bromosuccinimide, N-bromphthalimide, N-bromoacetamide, N-iodosuccinimide, N- Bromphthalazinone, N-chlorophthalazinone, N-promoacetani+J)”, N l N-cyfromobenzenesulfonamide Y, N-furomo N-methylbenzenesulfonamide, 1,3-dibromo-4,4 -dimethylhydantoin, etc.), and other halogen-containing compounds (for example, triphenylmethyl chloride, triphenylmethyl bromide, 2-bromobutyric acid, 2-bromoethanol, etc.).

These photosensitive silver halides and photosensitive silver salt forming components can be used in combination in various methods, and the amount used is from 0.001 mol to 10 mol, preferably 0.01 mol, per 1 mol of organic silver salt. mole to 0.3 mole.

Further, the heat developing power of the present invention is 2-9 as described above.
Each J-- having sensitivity to colored light, green light, and red light has a multilayer structure as a heat-developable red light-sensitive layer, a heat-developable green light-sensitive layer, and a heat-developable red light-sensitive layer. Silver halide emulsions, green-sensitive silver halide emulsions, red-sensitive silver halide emulsions,
Silver halide emulsions can be obtained by adding various spectral sensitizing dyes to pre-+4e silver halide emulsions.

Typical spectral sensitizing dyes used in the present invention include 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, pyridineoxazole, thiazole, selenazole, and imidazole are particularly preferred. Such a nucleus may contain an alkyl group, an alkylene group, a hydroxyalkyl group, a sulfoalkyl group, a carboxyl alkyl group, an aminoalkyl group or an enamine group capable of forming a fused carbocyclic or heterocyclic ring. Good too. Further, it may be symmetrical or asymmetrical, and the methine chain or polymethine chain may have an alkyl group, phenyl group, enamine group, or petero ring substituent.

In addition to the above-mentioned basic nucleus, melonanine pigments include, for example, thiohydantoin nucleus, rhodanine nucleus, oxazoline dione nucleus,
It may have an acidic nucleus such as a thiazolidinedione nucleus, a barbylic acid nucleus, a thiazolinthione nucleus, a malonitrile nucleus, or a 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, ascorbic acid derivatives, azaindene cadmium salts, organic sulfonic acids, etc., such as U.S. Pat. Nos. 2,933,390 and 2.937.089
A sensitizing additive that does not absorb visible light, such as those described in the Meiji MI book, etc., may be used in combination.

The amount of these dyes added is 1xto' mol-1 mol per mol of silver halide or non-silver halide forming component. More preferably, the amount is from IXIF' mol to 1 x 10 mol.

Examples of organic silver salts used in the heat-developable color photosensitive material of the present invention include Japanese Patent Publication Nos. 43-4924 and 44-26582.
No. 45-18416, No. 45-12700, No. 45-22185, and JP-A-49-52626,
No. 52-31728, No. 52-137:31, No. 5
No. 2-141222, No. 53-36224, No. 53-
3622 publications, U.S. Patent No. 3,330,633,
Silver salts of aliphatic carboxylic acids described in specifications such as No. 4,168.980, such as silver laurate, silver myristate, silver valmitate, silver stearate, silver arachidonate, silver behenate, etc. , also aromatic silver carboxylates, such as silver benbrozoate, silver phthalate, etc., and silver salts having imino groups, such as silver benzotriazole, silver saccharin, silver heptadane, silver phthalimide, etc., mercapto groups or thiones. Silver salts of compounds having groups such as 2-mercaptobenzo-oxazole, silver mercaptooxadiazole, silver mercaptobenzothiazole, silver 2-mercaptobenzimidazole, 3-mercapto-phenyl-1,2
, 4-1 riazole silver, and also 4-hydroxy-6-methyl-1,3,3a, ? -Tetrazaindene, 5-methyl-7-hydroxy 7-1°2, 3,4.6
- Examples include silver pentazaindene.

Also) LD16966, LD16907, British Patent No. 1,
590.956 and 1,590.957 may also be used.

Among these, silver salts having an imino group such as benzotriazole silver salts are preferred, and examples of benzotriazole silver salts include alkyl-substituted benzotriazole silvers such as methylbenzotriazole silver, bromo-benzotriazole silver, chlorobenzotriazole silver salts, etc. Halogen-substituted benzotriazole silver such as benzotriazole silver, amide-substituted benzotriazole silver such as 5-acetamidobenzotriazole silver, and also British Patent No. 1,590,95
No. 6, No. 1,590.957 Compounds described in each specification, for example, N-[6-chloro-4 to N-(3,5-Sifoo-4-hydroxyphenyl)imino-1-oxy- 5-Methyl-2,5-ychlorohexadien-2-yl]-5-carbamoylbenztriazole silver salt, 2-
Benzo) IJ Azol-5-ylazo-4-methoxy-1-naphthol silver salt, l-benzotriazole-5-
Examples include ylazo-2-su7to# silver salt, N--<nsotriazol-5-yl-4-(4-dimethylaminophenylazo)benzamide silver salt, and the like.

Further, nitrobenzotriazoles represented by the general formula (VD) and benzotriazoles represented by the following general formula (Vl) can be advantageously used.

General formula (Si几ヮ(a9)n Ag) In the formula, 几7 represents a nitro group, 几8 and R, may be the same or different, and each represents a halogen atom (for example, chlorine, bromine, iodine), a hydroxy group , a sulfo group or a salt thereof (e.g. sodium salt, potassium salt, ammonium salt), a carboxy group or a salt thereof (e.g. sodium salt, potassium salt, ammonium salt), a nitro group, a 77 group, or each has a substituent. carbamoyl group, sulfamoyl group, alkyl group (e.g. methyl group,
ethyl group, propyl group), alkoxy group (e.g. methoxy group, ethoxy group), aryl group (e.g. phenyl group)
Alternatively, it represents an amino group, where m is θ~2 and n is O or lf. Further, examples of substituents for the carbamoyl group include a methyl group, ethyl group, acetyl group, etc., and examples of substituents for the sulfamoyl group include a methyl group, an ethyl group, an acetyl group, etc. Examples of substituents for alkyl groups include carboxy groups and ethoxycarbonyl groups; examples of substituents for aryl groups include sulfo groups and nitro groups; examples of substituents for alkoxy groups include carboxy groups and ethoxycarbonyl groups. and the substituent of the amino group and 17 include, for example, an acetyl group, a methanesulfonyl group, and a hydroxy group, respectively.

The compound represented by the general formula (■) is a silver salt of a benzotriazole derivative having at least one nitro group, and specific examples thereof include the following compounds.

For example, 4-nitrobenzo) l) Silver azole, silver 5-nitrohencitriazole, 5-=tho-5-chlorobenzo 1. Riazole silver, 5-nitro-6-methylbenzotriazole silver, 5-nitro-6-methylbenzotriazole silver, 5-nitro-7-phenylbenzotriazole silver, 4-hydroxy-5-nitrobenzotriazole silver, 4-hydroxy -7-nitrobenzotriazole silver, 4-hydroxy-5,7-sinitropenzotriazole silver, 4-hydroxy-5-nitro-6-chlorobenzotriazole silver, 4-hydroxy-5-nide"-6-j
f ruhensotriazole silver, 4-sulfo-6-nitrobenzotriazole silver, 4-carboxy-6-nitrobenzotriazole silver, 5-carboxy-6-nitrobenzotriazole silver, 4-carbamoyl-6-nitrobenzotriazole silver - Riazole silver, 4-sulfamoyl-6-nitrobenzotriazole silver, 5-carboxymethyl-6-nitrobenzotriazole silver, 5-hydroxycarbonylmethoxy-6-nitrohencitriazole silver, 5-nitro-7-diatubenzotriazole silver, 5-amino-6
- Nitrohencitriazole silver, 5-nitro-7-(p
-nitrophenyl)benzotriazole silver, 5. r-dinitro-6-methylbenzotriazole silver, 5,7-dinitro-6-chlorpenzotriazole silver, 5-7 7
Examples include silver nitro 6-methoxybenzotriazole.

General formula (in the Kamo formula, 几1゜ is a hydroxy group, a sulfo group, or a salt thereof (e.g., sodium salt, potassium salt, ammonium salt)
, represents a carboxy group or a salt thereof (e.g., sodium salt, potassium salt, ammonium salt), a carbamoyl group which may have a substituent, and a sulfamoyl group which may have a substituent, and 几1 is a halogen atom ( (e.g. chlorine, bromine, iodine), hydroxy group, sulfo group or its salt (e.g. sodium salt, potassium salt, ammonium salt), carboxy group or its salt (e.g. sodium salt, potassium salt, ammonium salt), nitro group, cyano group , or an alkyl group (e.g., methyl group, ethyl group, propyl group), arylnon (e.g., phenyl group), alkoxy group (e.g., methoxy group, ethoxy group), or an amino group, each of which may have a substituent, and pr/ ′
il or 2 and q represent an integer from θ to 2.

Examples of substituents for the carbamoyl group in rt and oK include methyl, ethyl, and acetyl substituents such as methyl, (, ethyl, acetyl, etc.).

Substituents for the alkyl group in (2) include, for example, carboxyl group, ethoxycarbonyl group, etc. Substituents for the aryl group include, for example, sulfo group, nitro group, etc. Substituents for the alkoxy group include, for example, carboxy group, Examples of the ethoxycarbonyl group and the substituent of the amine group include an acetyl group, a methanesulfonyl group, and a hydroxy group.

Specific examples of the organic silver salt represented by the general formula ((sub)) include the following compounds.

For example, silver 4-hydroxybenztriazole, silver 5-hydroxypenztriazole, silver 4-sulfobenzotriazole, silver 5-sulfobenzotriazole, silver benzotriazole-4-sodium sulfonate, silver benzotriazole-sodium 5-sulfonate, benzotriazole silver Silver triazole-4-potassium sulfonate, silver benzotriazole-5-potassium sulfonate, silver benzotriazole-4-ammonium sulfonate, silver penzotriazole-5-ammonium sulfonate, silver 4-carboxybenzotriazole, 5-carboxy Silver benzotriazole, sodium benzotriazole-4-carboxylate,
Sodium benzotriazole silver-5-carboxylate, Potassium benzotriazole silver-4-carboxylate, Potassium benzotriazole silver-5-carboxylate, Ammonium benzotriazole silver-4-carboxylate, Benzotriazole silver-5-carboxylic acid Ammonium, 5-carbamoylpenzotriazole silver, 4-sulfamoylbenzotriazole silver, 5-carboxy-6-hydroxybenzotriazole silver, 5-carboxy-7-sulfobenzotriazole silver, 4-hydroxy-5-sulfobenzotriazole silver , 4-hydroxy-7-sulfobenzotriazole silver, 5.6'-dicarboxybenzotriazole silver, 4.6-') hydroxybenzotriazole silver, 4-hydroxy-5-chlorpenztriazole silver,
4-Hydroxy-5-methylbenzotriazole silver, 4
-Hydroxy-5-methoxybenzotriazole silver, 4
-Hydroxy-5-nitropenzotriazole silver, 4-
Hydroxy-5-cyanobenzotriazole silver, 4-hydroxy-5-aminobenzotriazole silver, 4-hydroxy-5-acetamidobenzotriazole silver, 4-
Hydroxy-5-benzenesulfonamidopenztriazole silver, 4-hydroxy-5-hydroxycarbonylmethoxybenzotriazole M, 4-hydroxy-5-
Carbonylmethoxybenzotriazole silver, 4
-Hydroxy-5-carboxymethylbenzotriazole silver, 4-hydroxy-5-ethoxycarbonylmethylbenzotriazole silver, 4-hydroxy-5-phenylbenzotriazole silver, 4-hydroxy-5-(p-nitrophenyl)benzotriazole Silver, 4-hydroxy-5-(p-sulfophenyl)benzotriazole silver,
4-Sulfo-5-chlorobenzotriazole silver, 4-sulfo-5-methylbenzotriazole silver, 4-sulfo-
5-methoxybenzotriazole silver, 4-sulfol 5-
Cyanobenzotriazole silver, 4-sulfo-5-aminobenzotriazole silver, 4-sulfo-5-acetamidobenzotriazole silver, 4-sulfo-5-benzenesulfonamidobenzotriazole silver, 4-sulfo-5-hydroxycarbonylmethoxybenzotriazole silver, 4
-Sulfo-5-ethoxyluponylmethquinopenezotriazole silver, 4-hydrogine-5-carboxybenzotriazole silver, 4-sulfo-5-carboquinomethylbenzotriazole silver, 4-sulfo-5-ethoxycarbonylmethylbenzotriazole Silver, 4-sulfo-5-phenylpenztriazole silver, 4-sulfo-5-(p-nido-phenyl)penztriazole silver, 4-sulfo-5
-(p-sulfophenyl)benzotriazole silver, 4-
Sulfo-5-methoxy-6-chlorobenzotriazole silver, 4-sulfo-5-chloro-6-carboxybenzotriazole silver, 4-carboxy-5-chloropenztriazole silver, 4-carboxy-5-methylbenzotriazole silver, 4-carboxy-5-nitropenzotriazole silver, 4-carboxy-5-aminobenzotriazole silver, 4-carboxy-5-methoxybenzotriazole silver, 4-carboxy-5-acetamidobenzotriazole silver, 4 -Carboxy-5-ethquincarbonylmethoxybenzotriazole silver, 4-carboxy-5-carboxymethylbenzotriazole silver, 4-carboxy-5-phenylbenzotriazole silver, 4-carboxy-5-(p-nitrophenyl)benzotriazole Silver,
Examples include silver 4-carboxy-5-methyl-7-sulfobenzotriazole. These compounds may be used alone or in combination of two or more.

The method for preparing the organic silver salt used in the present invention will be described later, but the organic silver salt may be isolated and used by dispersing it in a binder by an appropriate means, or it may be used by dispersing it in a binder by an appropriate means. A silver salt may be prepared and used as is without isolation.

The amount of the organic silver salt used is 0.05j9-/m of support.
1 (1.0 g, preferably 0.2.9 to 2.0 I
It is.

Further, examples of the reducing agent used in the heat-developable color photosensitive material of the present invention include, for example, U.S. Pat.
No. 3.761,270, No. 3.764゜328, and also 几D12146, RDI5108, 几D
p-phenylenediamine type and p-aminophenol type developing agents, phosphoroamide phenol type and sulfonamide phenol type developing agents, hydrazone type color developing agents, etc. described in No. I 5127 and JP-A No. 56-27132, etc. Known color developing agents or their precursors may be used, but particularly preferred are those disclosed in JP-A-56-146133 and Japanese Patent Application No. 5, filed by the present applicant.
p-(N.

N-dialkylaminophenyl) sulfamic acid developing agent.

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 organic acid silver salt used, the type of photosensitive silver salt, and the type of other additives, but it is usually 0.00 to 1 mole of organic silver salt.
The amount ranges from 5 mol to 10 mol, preferably from 0.1 mol to 3 mol.

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
No. 6, No. 4,207,392 specifications or RJ)
15733, 15734, 15776, etc., organic acids described in Japanese Patent Publication No. 12700/1983, -co- described in US Pat. No. 3,667,959, etc.
, non-aqueous polar solvent compound having -so□-1-80- group, melt former-1 described in U.S. Pat. No. 3.438.776 U.S. Pat. No. 3.666.477, JP-A-51
There are polyalkylene glycols described in No.-19525. In addition, as a color toning agent, for example, JP-A-46-49
No. 28, No. 46-6077, No. 49-5019, No. 49-5020, No. 49-91215, No. 49-1
No. 07727, No. 50-2524, No. 50-6713
No. 2, No. 50-67641, No. 50-114217, No. 52-33722, No. 52-99813, No. 5
No. 3-1020, No. 53-55115, No. 53-76
No. 020, No. 53-125014, No. 54-1565
No. 23, No. 54-156524, No. 54-15652
No. 5, No. 54-156526, No. 55-4060,
Publications such as No. 55-4061 and No. 55-32015, as well as West German Patent No. 2.140.406 and No. 2. l
47.063, 2,220,618, U.S. Patent 3,080,254, 3.847,612, 3,782,941, 3.994,732
No. 4,123.282, No. 4,201,58
7 Talazinone, phthalicide, pyrazolone, quinazolinone, N
-Hydroxynaphthalimide, benzoxazine, naphthoxazinedione, 2,3-dihydro-phthalazinedione, 2,3-dihydro-1,3-oxazine-2,4
-dione, oxypyridine, aminopyridine, hydroxyquinoline, aminoquinoline, isocarbostyryl, sulfonamide, 211-1,3-benzothiazine-2,
4-(3H) dione, pe/cytriazine, mercaptotriazole, dimercabutotetrazapentalene, phthalic acid, naphthalic acid, heptalaminic acid, etc.
A mixture of one or more and an imidazole compound or V
Examples include mixtures of at least one acid or acid anhydride such as phthalic acid and naphthalic acid and a phthalazine compound, and combinations of ntalazine and maleic acid, itaconic acid, quinolinic acid, gentisic acid, and the like. Also, Japanese Patent Application No. 57-73215 and No. 57-768 filed by the present applicant.
3-amino-5-mercap)-1,2,4-triazoles, 3-acylamino-
5-mercapto-1,2,4-triazoles are also effective.

Furthermore, as an anti-capri agent, for example,
No. 11113, JP-A-49-90118, JP-A No. 49-1
No. 0724, No. 49-97613, No. 50-1010
No. 19, No. 49-130720, No. 50-12333
No. 1, No. 51-47419, No. 51-57435,
No. 51-78227, No. 51-104338, No. 5
No. 3-19825, No. 53-20923, No. 51-5
No. 0725, No. 51-3223, No. 51-42529
No. 51-81124, No. 54-51821, No. 55-93149, and British Patent No. 1,
No. 455,271, U.S. Patent No. 3°885.968,
3.700.457, 4.137.079, 4.138.265, West German Patent No. 2,617,
907 and other specifications, or oxidizing agents (e.g., N-halogenoacetamide, N-halogenosuccinimide, perchloric acid and its salts, inorganic peroxides, sulfates, etc.), or acids and their salts (e.g., sulfinic acid, lithium diurate, sulfuric acid, diterpenic acid, thiosulfonic acid, etc.), or sulfur-containing compounds (e.g., mercapto compound-releasing compounds,
thiouracil, disulfide, simple sulfur, mercap)
1,2,4-triazole, thiapurinthione, polysulfide compounds, etc.), others, oxazoline, 1,2
．． 4-) 1J Compounds such as azole and phthalimide are mentioned.

In addition, as a stabilizer, a grid-out preventive agent may also be used at the same time, especially after treatment.
53-46 (halogenated hydrocarbons described in Publication No. 120, etc., specifically tetrabromobutane, tribromoethanol, 2-bromo-2-tolylacetamide, 2-bromo-2-tolylacetamide,
-bromo 2-tolylsulfonylacetamide, 2-1
J Bromomethylsulfolebenzof7zole, 2.4-
Examples include bis(tribromomethyl)-6-methyltriazine.

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

Furthermore, U.S. Patent No. 3.3OL678, U.S. Patent No. 3.5
No. 06,444, No. 3.824,103, No. 3.
No. 844,788, the isothiuronium-based stabilizer foam V Cursor-1 described in each specification and U.S. time: 1FuS
:1.669,670! , No. 4,012, 2 fi
0, 4,060.420 Meiji A, etc. may be contained.

In addition to the above-mentioned components, the heat-developable color light-sensitive material of the present invention further contains a spectral sensitizing dye, a Halley 7:I inhibitory dye, a fluorescent brightener, a hardening agent, an antistatic agent, and a plasticizer. , various additives such as spreading agents, coating aids, etc. can be added.

A hydrophilic binder is used as the binder for the photosensitive layer of the heat-developable color photosensitive material of non-expandable 11llJ, the intermediate layer of non-expandable q1, and other layers, but a water-splashable binder may also be used in part. The hydrophilic binder used in the present invention refers to a binder that is soluble in water or a mixture of water and an organic solvent (a solvent that is optionally miscible with water). For example, proteins such as gelatin, gelatin conductors, cellulose derivatives, vorizanolyte such as dextran, natural substances such as gum arabic, etc. and useful polymers such as polyvinyl acecool (preferably with a degree of acetalization of less than 20%, e.g. polyvinyl butyral) ), polyacrylamide, polyvinylpyrrolidone, ethyl cellulose, polyvinyl alcohol (saponified Is 5% or more is preferred), and particularly preferred are gelatin, gelatin derivatives, etc. natural substances such as polyvinyl acecool (preferably water-soluble with a degree of acetalization of 15% or less), polyvinylpyrrolidone low molecular weight (viscosity average molecular weight 50() or less), polyvinyl alcohol, etc. If still necessary, A mixture of two or more kinds of binders may be used.The binder's weight ratio is 1/lo to 10, preferably 1/4 to 4 parts, based on 1 part of each photosensitive centering or organic silver salt.

The layers containing the above components and other layers of the invention can be coated on a wide variety of supports. Supports used in the present invention include cellulose nitrate film, cellulose ester film, polyvinyl acetal film,
Examples include plastic films such as polyethylene film, polyethylene terephthalate film, and polycarbonate film, and metals such as glass, paper, and aluminum. Baryta paper, resin coated paper, and water-resistant paper may also be used.

In addition to the photosensitive layer and intermediate layer described above, the heat-developable color photosensitive material of the present invention may be provided with layers such as an overcoat polymer layer, an undercoat layer, a backing layer, or a filter layer, depending on the purpose. .

The heat-developable color light-sensitive material can form a dye image by imagewise exposure and heat treatment, but the dye image is melted into an image-receiving layer using a solvent such as methanol or a solvent such as methyl anthede by heat. It can be thermally transferred using a hot solvent. Still the first UK patent,
It is also possible to use thermal transfer methods such as those described in US Pat. No. 5,900,957.

The photosensitive material of the present invention (hereinafter referred to as the photosensitive element of the present invention, ψ) is imagewise exposed and then thermally developed to form an imagewise distribution of a heat transferable dye from the dye-providing substance. When applied to a color thermal diffusion transfer method in which at least a portion of the image is thermally transferred to an image-receiving layer in a stacked relationship with the photosensitive feed of the present invention, a high-density image with improved image density formed on the image-receiving layer is provided. .

The image-receiving layer only needs to have the function of receiving the dye released or formed by thermal development, and has a mordant used in a dye diffusion transfer type photosensitive material or a glass transition temperature described in JP-A No. 57-207250. is preferably made of a heat-reducing organic polymer material having a temperature of 40°C or more and 250°C or less.

Specific examples of the mordant include nitrogen-containing secondary and tertiary amines, nitrogen-containing ascites ring compounds, quaternary cationic compounds thereof, U.S. Pat. Nos. 2,548,564 and 2,48
No. 4,430, No. 3.148,061, No. 3.756
．． 814, vinylpyridinium cationic polymers as disclosed in U.S. Pat. No. 2,675.316, dialkylamino group-containing polymers as disclosed in U.S. Pat. No. 2,882.156 cross-linked with gelatin, etc., disclosed in U.S. Patent No. 3,625,694, U.S. Pat. Possible mordant, U.S. Pat. No. 3,958,995, 2,721,852
2.798°063, a water-insoluble mordant disclosed in JP-A-50-61228, U.S. Patent No. 3.788,855, West German Patent Application ( OLD) No. 2,843.320, JP-A No. 53-30328, JP-A No. 52-155528, JP-A No. 53
-125, 53-1024, 54-74430
No. 54-124726, No. 55-22766,
US IP! f Permit No. 3.642,482, 3.488
．． No. 706, No. 3.557,066, No. 3.271.
No. 147, No. 3.271, 148, Special Publication No. 55-29
No. 418, No. 56-36414, No. 57-12139
No. R1) 12045 (1974).

Particularly useful mordants are polymers containing ammonium salts,
American tube a'r No. 3.709. (Described in No. 190. For example, polymers containing ammonium salts include polystyrene-N, N, Nl-\xyl-N-
In vinylbenzyl ammonium chloride, the ratio of styrene and vinylbenzyl ammonium fluoride is l
:4 to 4:1, preferably l:1.

A typical image-receiving layer for dye diffusion transfer is obtained by mixing a polymer containing an ammonium salt with gelatin and coating it on a support. A transfer solvent can be used to transfer the dye from the heat-developable photosensitive layer to the image-receiving layer. As the transfer solvent, a low boiling point solvent such as methanol/ethyl acetate, diisobutyl ketone, etc. and a high boiling point solvent such as tri-n-cresyl phosphate, 1-tri-n-nonyl phosphate-1-, di-n-butyl phthalate, etc. are used as the transfer solvent. In the case of a high-boiling solvent, it can be emulsified in gelatin using a suitable emulsifier and added to the image-receiving layer.

As an example of the heat-resistant organic polymer substance, molecule 1200
0 to 85,000 polystyrene, polystyrene derivatives with substituents having 4 or less carbon atoms, polyacetals such as polyvinylcyclohexane, polydivinylbenzene, polyvinylpyrrolidone, polyvinylcarbazole, polyallylbenzene, polyvinyl alcohol, polyvinyl formal, and polyvinyl butyral; Vinyl chloride, chlorinated polyethylene, polybutylene trichloride, polyacrylonitrile, poly N, N-dimethylallylamide,
Polyacrylate having p-cyanophenyl group, pentachlorophenyl group and 2,4-dichlorophenyl group,
Polyacrylic chloroacrylate, polymethyl methacrylate, polyethyl methacrylate, polyethyl methacrylate, polyisobutyl methacrylate, polyisobutyl methacrylate, poly tert-butyl methacrylate, polycyclohexyl methacrylate, polyethylene glycol dimethacrylate, poly-2-cyano-
Polyesters such as ethyl methacrylate and polyethylene terephthalate, polysulfone, bisphenol A
Examples include polycarbonates such as polycarbonate, polyanhydrides, polyamides, and cellulose acetates. Also, Polymer Handbo
ok 2nd cd, (JBrandrup + E,
Edited by HImmcrgut) John Wiley &amp;
The glass transition temperature listed in 5ons Publishing, 40
Synthetic polymers below 0 C are also useful. These polymeric substances may be used alone or may be used as a copolymer by combining more than the number of polymers.

Particularly useful polymers include cellulose acetate, such as triacetate, niacetate, terephthalic acid with hebutamethylene diamine, adipic acid with fluorene dipropylamine, diphenic acid with hexamethylene diamine,
Examples include polyamides made by combining hexamethylene diamine and isophthalic acid, polyesters made by combining diethylene glycol and diphenylcarboxylic acid, bis-p carboxyphenoxybutane and ethylene glycol, polyethylene terephthalate, and polycarbonates. These polymers may be modified. For example, /chlorhexane dimetatool, isophthalic acid, methoxy/polyethylene-glycol, 1,
Polyethylene terephthalate using 2-dicarbomethoxy-4-benzenesulfonic acid or the like as a modifier is also effective.

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

The image-receiving layer may also 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.

〔Example〕

Examples of the present invention are shown below, and embodiments of the present invention include:
It is not limited to this.

Examples and Comparative Examples 227 g of silver benzotriazole and 40 g of methyl alcohol
0mg, 8% polyvinyl alcohol (Gohsenol A
L-02: Nippon Gohsei) aqueous solution 500mM was added,
Dispersion was performed using a ball mill for 24 hours. Next, while stirring this dispersion, a red sensitized silver iodobromide emulsion (silver iodide 5
Cubic grains with an average grain size of 01 μm containing 6 I), 9 gelatin and 0.353 mol of silver in 1 kg of emulsion (mol%)
Added 28+d.

Additionally, 8.3 g of p-amino-N,N-diethylaniline
and exemplified dye-donating substances as cyan dye-forming couplers (
1) 309k di(ethylhexyl)-sulfosuccinate 5% aqueous solution g5rnQ and gelatin 5% aqueous solution xoomQ were mixed, and the resulting mixture was pulverized and dispersed in a ball mill. Furthermore, 2% methanol solution of 3-amino-4-allyl-5-mercaptotriazole c + mQ15
0 g of acetamide was added and stirred thoroughly. The coating solution prepared in this way was coated with gelatin (dry film thickness: 3 II
It was coated and dried on polyethylene terephthalate paste (silver content 5, 2 mg/d n”).

Next, an intermediate layer was applied thereon with a 4% polyvinyl alcohol aqueous solution to a wet film thickness of 55 μm and dried.

Then, green-sensitive silver halide of the same composition was added in place of the red-sensitive silver halide according to the recipe of the first layer, and the composition was the same except that the exemplified dye-providing substance (6) was used as the coupler. Comparative sample 1 was prepared by coating and drying to a wet film thickness of 55 μm.

Next, instead of the intermediate layer of Comparative Sample 1, 1.03 g of 2-(N-ethylcarbamoyl)-1-f phthol was added to 4% polyvinyl alcohol lfi and 5% alkanol XO (
Product name of sodium diinoprobyl naphthalene sulfonate manufactured by DuPont Company) Water IIT.

After ball milling for 24 hours with a barb, the wet film thickness is 55μ.
Comparative Sample 2 is a sample that is exactly the same as Comparative Sample 1, except that the intermediate layer is coated so that m is applied.

Next, in the same manner, 1-phenyl-3-methyl-5-pyrazolone o,84& was used instead of 2-(N-ethylcarbamoyl)-1-naphthol used in the intermediate layer of Comparative Sample 2, and Comparative Sample 3 was prepared. do.

Next, 2-(
Comparative sample 4 used 224 g of 4-(2,4-di-t-amylphenoxy)butylcarbamoyl)-1--1)-phthol, and similarly 1-(2,4,6-)lichlor phenyl)-3-(2'-chloro-5'-palmitoylamidoanilino)-5-pyrazolone3. l,9
Comparative sample 5 is the one using the following.

Next, Comparative Sample 2 was prepared in the same manner, except that 2-(N-ethylcarbamoyl)-1-naphthol used in the intermediate layer of Comparative Sample 2 was replaced with Turnip 2-Exemplified Compound (2) 3.46.9 of the present invention. A sample exactly the same as Sample 2 is designated as Sample 6 of the present invention, and a sample using 3.129 of Exemplified Compound (1) is designated as Sample 7 of the present invention.

Separately, a 5% solution of polyvinyl chloride in tetrahydrofuran (containing dibutyl phthalate in an amount of 1% by weight based on the polymer) was placed on photographic paper at a rate of 1.20% polyvinyl chloride per 1 rrIt. ! 9, and an image receiving paper was prepared.

The comparative sample 1, 2.3.4.5 and the present invention sample 6.7
were each exposed to red light through a step wedge. Next, the image receiving paper and the coated surface were brought into close contact with each other and developed at 160° C. for 1 minute. The density at the maximum density (Dm) part and the green density were measured.

As a result, Comparative Samples 1 and 2.3 had a cloudy color tone, while Comparative Samples 4 and 5 had little color turbidity up to the middle tone area, but considerable color turbidity was observed in the Dm area. However, sample 6 of the present invention.
In No. 7, the color turbidity was reduced even in the Dm section. D
Table 1 shows the results of measuring the red density and green density at part m.

Table 1 below shows the results of similar development using reverse eC green light through a step wedge.

As is clear from Table 2, it can be seen that by having an intermediate layer containing the coupler of the present invention, color turbidity is improved and the transferability of the dye from the bottom layer is improved.
In particular, when a coupler having both an alkyl group as a hydrophobic pallast group and a water-soluble group such as a sulfo group is used, it is found to be very effective against color turbidity in a thermal development system.

Patent applicant: Rokusha Konishi Kogyo Co., Ltd. Agent: Patent Attorney Nobuaki Sakaguchi (1 other person)

Claims (1)

[Claims] Contains a photosensitive silver halide, an organic silver salt, a dye-providing substance capable of releasing or forming a diffusible dye by heat development, a reducing agent, and a binder, and the color sensitivity of the photosensitive silver halide and the hue of the dye Thermal development power 2 - In a photosensitive material having at least two photosensitive layers on a support having different photosensitive layers, an immobile compound is formed between the two photosensitive layers by reacting with an oxidized form of a developing agent. 1. A heat-developable color photosensitive material, characterized in that it has a substantially non-photosensitive intermediate layer containing at least one kind selected from the group consisting of color couplers.