JPH0511401A - Heat developable color photosensitive material - Google Patents

Abstract

PURPOSE:To provide the multilayer heat-developable color photodensity of a transferred sensitive material high in the maximum density of a transferred image and low in fog and excellent in color separability, and further superior in diffusion transfer performance of a dye from the lowest layer. CONSTITUTION:The multilayer heat-developable color photosensitive material is characterized by comprising a support, a layer containing at least blue- sensitive silver halide, a reducing agent, a yellow dye donor, and a binder, a layer containing at least green-sensitive silver halide, a magenta dye donor, and a binder, and a layer containing at least red-sensitive silver halide, a reducing agent, a cyan dye donor, and a binder, and the binder is characterized by comprising gelatin and at least one kind of hydrophilic binder, in an amount of 3-10g binder per 1m<2> of the support.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-developable color light-sensitive material, and more particularly to a heat-developable color light-sensitive material having a high maximum transferred image density and low fog and excellent color separation.

[0002]

2. Description of the Related Art Conventionally known color photographic methods using photosensitive silver halide are superior to other color photographic methods in terms of photosensitivity, gradation and image storability, and are the most widely used. It has been put to practical use. However, in this method, since the wet processing method is used in the steps of development, bleaching, fixing, washing with water, the processing takes time and labor,
In addition, there are many problems such as pollution of the human body due to the treatment chemicals, or concern about contamination of the treatment room and workers by the treatment chemicals, and the labor and cost of waste liquid treatment.

Therefore, there has been a demand for development of a color image forming method capable of dry processing.

A heat-developable black-and-white light-sensitive material characterized in that the developing step is carried out by heat treatment has been known for a long time, and it is described, for example, in Japanese Patent Publication Nos. 43-4921 and 43-4924. A light-sensitive material comprising a salt, a silver halide and a developer is disclosed. Further, many heat-developable color light-sensitive materials to which this heat-development black-and-white light-sensitive material is applied are known.

For example, US Patent Nos. 3531286 and 3761270
No. 3764328, Research Disclosure No. 1510
8, No. 15127, No. 12044, and No. 16479, etc., containing a photographic coupler and a color developing agent in a photothermographic material, U.S. Pat. Roger No. 13443 and No. 14347 and the like, those using a leuco dye, U.S. Pat.
No. 5,957, Research Day Closure No. 14433, No.
14448, No. 15227, No. 15776, No. 18137 and No.
For 19419 etc., about the one applying the silver dye bleaching method,
U.S. Pat. Nos. 4,124,398, 4,124,387 and 4,123,273 respectively describe methods for thermal bleaching of photothermographic materials.

However, these proposals relating to the heat-developable color light-sensitive material make it difficult or impossible to bleach or fix simultaneously formed black-and-white silver images, and if possible, wet processing. Etc. are required. Therefore, none of these proposals is preferable, because it is difficult to obtain a clear color image and complicated post-processing is required.

On the other hand, a heat-developable color light-sensitive material for transferring a diffusible dye released by heat development to obtain a color image,
JP-A-57-179841, 57-186744, 57-198458,
Nos. 57-1207250, 58-40551, and 58-58543, and disclosed by the present inventors.
No. 57-229649. These proposals are those in which a dye-providing substance having a diffusible dye in the same molecule releases a diffusible dye by a heat development reaction of an organic silver salt and is transferred to an image receiving layer to obtain a color image, This is referred to herein as "dye-releasing".

On the other hand, Japanese Patent Application No. 57-229 filed by the present inventors.
No. 671, No. 58-33363, No. 58-33364, the proposals shown in the respective specifications are colorless or light-colored dye-providing substances,
A color image is obtained by reacting with an oxidized product of a color developing agent generated by a heat development reaction of an organic silver salt to form a heat diffusible dye, and transferring it to an image receiving layer to obtain a color image. Is called a "dye-forming type".

Regardless of the type such as the dye-releasing type or the dye-forming type, when a dye is diffuse-transferred by heat without heat treatment to obtain a multicolor image on the image receiving layer. It is considered effective to adopt a multilayer structure as in the conventional color light-sensitive material.

As a conventional color light-sensitive material, when a print light-sensitive material is taken as an example, in the case of color paper, a blue-sensitive layer containing a yellow coupler, a green-sensitive layer containing a magenta coupler and a cyan coupler are usually contained in order from the bottom layer. A red sensitive layer is formed. In the case of diffusion transfer printing,
The bottom layer is a red-sensitive layer that supplies a cyan dye, and then a green-sensitive layer that supplies a magenta dye and a blue-sensitive layer that supplies a yellow dye are applied in this order. And an intermediate layer for preventing color turbidity is coated between each layer, and in many cases,
A yellow filter layer is provided between the blue-sensitive layer and the green-sensitive layer.

Even in the case of a heat-developable color light-sensitive material, the above-mentioned multi-layered structure is considered in order to completely reproduce color. However, in the case of a heat-developable color light-sensitive material, when the multi-layered multi-layer structure is used, there is a problem that the dye in the lowermost layer is not sufficiently transferred to the image-receiving layer, particularly because of poor transfer of the dye from the lowermost layer. ..

At the same time, due to the unfavorable layering effect, fog in the lower layer, that is, a layer farther from the image receiving layer, becomes larger than that in the case of a single layer, and the color separation property is insufficient. Therefore, there is a strong demand to improve such various drawbacks.

[0013]

SUMMARY OF THE INVENTION It is, therefore, an object of the present invention to provide a heat-developable color light-sensitive material having a multilayer structure which has a high maximum density of a transferred image and a low fog and is excellent in color separation. It is an object of the present invention to provide a heat-developable color light-sensitive material having a multi-layer structure, which is excellent in the diffusion transferability of dye from the lower layer.

[0014]

The above-mentioned object of the present invention is to provide a layer containing at least a photosensitive silver halide, a reducing agent, a yellow dye-donor and a binder on a support, at least a photosensitive silver halide, a reducing agent and a magenta. A multilayer photothermographic material having a layer containing a dye-donor and a binder, and a layer containing at least a photosensitive silver halide, a reducing agent, a cyan dye-donor and a binder, wherein the binder is gelatin and at least one kind. The above-mentioned hydrophilic binder, and the amount of the binder is the support 1
It can be achieved with a heat-developable color light-sensitive material of 3 to 10 g per m ² .

The present invention will be described in more detail below.

The heat-developable color light-sensitive material of the present invention has a multilayer structure as described above, and the binder of each constituent layer is gelatin and at least one hydrophilic binder, and the amount of the binder used is 1 m ^{2 of the} support. It is one of the features that it is 3 g to 10 g per unit.

That is, according to the present invention, when the amount of the binder is smaller than the above amount, the amount of constituents other than the binder, such as silver halide, organic silver salt, reducing agent, dye-donor substance, etc., retained by the binder is required. There is less, so that an image having a sufficient maximum density cannot be obtained, or the above-mentioned constituents are not sufficiently retained by the binder, which causes color turbidity due to undesired diffusion between layers (mainly diffusion of a dye-donor substance). I have something to do.
Also, if the amount of binder is larger than the above, the maximum concentration is small,
In addition, the minimum density increases, which is not preferable.

Further, according to the present invention, a hydrophilic binder is used as the binder. However, when a hydrophobic binder is used, the transfer efficiency of the dye is lowered, the maximum density is lowered, and the dye-donor substance is diffused between layers. Color turbidity occurs.

The "hydrophilicity" of the hydrophilic binder referred to in the present invention means that it is soluble in water or a mixed solution of water and an organic solvent (a solvent which can be arbitrarily mixed with water). Examples of the organic binder include gelatin, gelatin derivatives, cellulose derivatives, polysaccharides such as dextran, natural substances such as gum arabic, and polyvinyl acetal as an effective polymer (preferably having an acetalization degree of 20% or less, for example, polyvinyl butyral). ),
Examples thereof include polyacrylamide, polyvinylpyrrolidone, ethyl cellulose, polyvinyl alcohol (preferably having a saponification degree of 75% or more). If necessary, two or more kinds may be mixed and used.

A particularly preferable binder in the present invention is gelatin and a mixed binder with one or more kinds of hydrophilic binders other than gelatin, and the content of gelatin in such binder is preferably 20% by weight or more. And more preferably in the range of 20 to 80% by weight, and the total amount of gelatin is 0.6 to 5 g per 1 m ² of the support.
Is a preferable range.

As the hydrophilic binder other than gelatin, polyvinylpyrrolidone and polyvinyl alcohol are particularly preferable.

In the present invention, gelatin is effective in suppressing fog and retaining the dye-donor substance in the layer during development. When the content in the binder is 20% by weight or more, the above effect is particularly remarkable, and When the content is 80% by weight or less (more preferably 60% by weight or less), the transferability of the dye is remarkably improved and the maximum density is increased.

In the present invention, if the amount of the binder is increased beyond the limit range of the present invention, the transferability is hindered and the fog is increased. On the other hand, if the amount is less than this range, the color separability deteriorates.

A thermal solvent is preferably added to each of the above-mentioned constituent layers according to the present invention for the purpose of enhancing the developing rate, dye forming efficiency, transfer performance and the like.

The hot solvent used in the present invention is a substance which is a solid, a semi-solid or a liquid at room temperature and dissolves, touches or plasticizes the binder when heated.
Preferred examples thereof include urea derivatives, amide derivatives, polyethylene glycols and polyhydric alcohols, and these thermal solvents may be used alone or in combination of two or more. It is preferable that these thermal solvents not only improve the transferability of the dye, but also improve the developability and the release or formation of the dye. The melting point of the thermal solvent of the present invention need not be below the thermal development temperature, and may be a liquid at room temperature.

As the urea derivative, those represented by the following general formula (1) are preferable.

[0027]

[Chemical 1]

In the formula, X is an oxygen atom or a sulfur atom, R ₁ ,
R ₂ , R _{3 and} R ₄ may be the same or different and each is a hydrogen atom or a substituted or unsubstituted alkyl group having 12 or less carbon atoms (R ₁ and R ₂ and R ₃ and R ₄ are bonded to each other. A ring may be formed) or a substituted or unsubstituted aryl group having 12 or less carbon atoms.

As the amide derivative, those represented by the following general formula (2) are preferable.

[0030]

[Chemical 2]

In the formula, R ₅ represents a substituted or unsubstituted alkyl group having 12 or less carbon atoms or a substituted or unsubstituted aryl group having 12 or less carbon atoms, and R ₆ and R ₇ are the same or different. _May also represent a hydrogen atom, a substituted or unsubstituted alkyl group having 6 or less carbon atoms, a substituted or unsubstituted aryl group or acyl group having 12 or less carbon atoms (6 or less carbon atoms), and R ₅ and R ₆ may combine to form a ring. Polyethylene glycols having a molecular weight of 150 to 10,000 are preferable.

As the polyhydric alcohols, the total number of carbon atoms is
Cyclic or chain-like (which may be substituted with a halogen atom, an alkoxy group, an acyl group or the like) alcohols having 12 or less and having 2 to 6 hydroxy groups are preferable.

Specific examples of urea derivatives include urea, thiourea, 1,3-dimethylurea, 1,3-diethylurea, diethyleneurea, 1,3-diisopropylurea, 1,3-dibutylurea, 1,
1-Dimethylurea, 1,3-dimethoxyethylurea, 1,3-dimethylthiourea, 1,3-dibutylthiourea, tetramethylthiourea, phenylurea, tetramethylurea, tetraethylurea and the like.

Specific examples of the amide derivative include acetamide, propionamide, n-butylamide, i-butylamide, benzamide, diacetamide, dimethylformamide, acetanilide, ethylacetamide acetate, 2-chloropropionamide, 3-chloropropionamide, phthalimide. , Succinimide, N, N-dimethylacetamide and the like.

Specific examples of the polyhydric alcohol include 1,5-pentanediol, 1,6-hexanediol, dixylitol, pentaerythritol, 1,4-cyclohexanediol, 1,2-cyclohexanediol and 2,2-diethanol. Examples include hydroxybezophenone, 1,8-octanediol and petriol.

The content of the thermal solvent in the present invention is 10% to 300%, preferably 20% to 150% of the binder amount,
It is particularly preferable to contain 1 to 9 g per 1 m ^{2 of the} support.
The thermal solvent used in the present invention may be used alone or in combination of two or more.

The heat-developable color light-sensitive material of the present invention contains a yellow dye-donor substance, a magenta dye-donor substance and a cyan dye-donor substance in its constituent layers. These dye-donor substances according to the present invention are used as a developing agent. It is a dye-donating substance that releases a dye by a coupling reaction with an oxidant (coupling dye-releasing type) or forms a dye (coupling dye-forming type). Substances) or oxidants (oxidizing dye-donor substances), and there are dye-donor substances that release dyes in association with reduction or oxidation reactions.

As the above-mentioned coupling dye-releasing dye-providing substance, compounds represented by the following general formula (3) are preferable.

In the general formula (3) Cp ₁ -X-Dye, Cp ₁ represents a coupler residue excluding the hydrogen atom at the active position, X represents a divalent linking group or a simple bond, and Dye represents Represents a diffusible dye residue.

Examples of the coupler residue represented by Cp ₁ include those represented by the following general formulas (4) to (9).

[0041]

[Chemical 3]

In the above formula, R ₁ , R ₂ , R ₃ and R ₄ are each a hydrogen atom, a halogen atom (preferably a chlorine atom, a bromine atom or an iodine atom) or an alkyl group (preferably having a carbon number of 1 to 1).
The alkyl group of 24, for example, methyl, ethyl, butyl, t-octyl, n-dodecyl, n-pentadecyl, cyclohexyl and the like groups can be mentioned, but further an aryl group, for example an alkyl group substituted with a phenyl group. As a benzyl group, may be a phenethyl group), a substituted or unsubstituted aryl group (eg, phenyl group, naphthyl group, tolyl group, mesityl group), acyl group (eg, acetyl group, tetradecanoyl group, pivaloyl group, Substituted or unsubstituted benzoyl group), alkyloxycarbonyl group (eg methoxycarbonyl group, benzyloxycarbonyl group), aryloxycarbonyl group (eg phenoxycarbonyl group, p-tolyloxycarbonyl group, α
-Naphthoxycarbonyl group), alkylsulfonyl group (eg, methylsulfonyl group), arylsulfonyl group (eg, phenylsulfonyl group), carbamoyl group (eg, substituted or unsubstituted alkylcarbamoyl group, methylcarbamoyl group, butylcarbamoyl group, tetra) Decylcarbamoyl group, N-methyl-N-dodecylcarbamoyl group, optionally substituted phenoxyalkylcarbamoyl group, specifically 2,4-di-t-phenoxybutyl-carbamoyl group, substituted or unsubstituted phenyl Rucarbamoyl group, specifically 2-dodecyloxyphenylcarbamoyl group, etc.), a substituted or unsubstituted acylamino group (eg, acetamide, n-butylamide group, i-propylamide,
Laurylamide group, optionally substituted β-phenoxyethylamide group, phenoxyacetamide group, substituted or unsubstituted benzamide group, methanesulfonamideethylamide group, β-methoxyethylamide group), alkoxy group ( Preferably an alkoxy group having 1 to 18 carbon atoms, such as a methoxy group, an ethoxy group, an octadecyloxy group), a sulfamoyl group (eg, methylsulfamoyl group, n-dodecylsulfamoyl group, a substituted or unsubstituted phenylsulfamoyl group). Group, specifically, dodecylphenylsulfamoyl group), a sulfonylamino group (eg, methylsulfonylamino group, tolylsulfonylamino group), a hydroxyl group, or the like. R ₁ and R ₂ may combine with each other to form a saturated or unsaturated 5- or 6-membered ring.

R ₅ is an alkyl group (preferably an alkyl group having 1 to 24 carbon atoms, for example, a methyl group, a butyl group, a heptadecyl group) or an alkoxy group (preferably 1 to 18 carbon atoms).
An alkoxy group such as a methoxy group, an ethoxy group, an octadecyloxy group), an arylamino group (for example, an anilino group, and an anilino group substituted with a substituent such as a halogen atom, an alkyl group, an amide group or an imide group), Or an unsubstituted alkylamide group (eg, laurylamide, optionally substituted phenoxyacetamide, phenoxybutanamide group), a substituted or unsubstituted arylamide group (eg, benzamide group), a halogen atom, an alkyl group , A benzamide group substituted with an alkoxy group, an amide group or the like).

Further, R ₆ , R ₇ and R ₈ are hydrogen atoms,
Halogen atom (preferably chlorine atom, bromine atom, iodine atom), alkyl group (preferably alkyl group having 1 to 2 carbon atoms, for example, methyl group, ethyl group), substituted or unsubstituted alkylamide group (for example, laurylamide group) Represents an optionally substituted phenoxyalkylamide group, for example, an alkyl-substituted phenoxyacetamido group), a substituted or unsubstituted arylamide group (for example, a benzoylamide group), and the like.

Next, R ₉ is an alkyl group (preferably an alkyl group having 1 to 8 carbon atoms (eg, methyl group, butyl group, octyl group), a substituted or unsubstituted aryl group (eg, phenyl group, tolyl group, methoxy group). (Phenyl group) and the like.

Further, R ₁₀ represents an arylamino group (for example, an anilino group, and an anilino group substituted with a halogen atom, an alkyl group, an alkoxy group, an alkylamido group, an arylamido group, an imide group or the like).

R ₁₁ , R ₁₂ , R ₁₃ , R ₁₄ , R ₁₅ and R ₁₆ have the same meaning as the groups represented by R ₁ and R ₂ .

Further, at least _{one of} R _{1 to} R ₄ , R _{5 to} R ₈
At least one, at least one of R _{9 to} R ₁₀ , R _{11 to} R
_At least one of ₁₂ , at least one of R _{13 to} R ₁₄ , and at least one of R _{15 to} R ₁₆ are substituted with a hydrophilic group such as a sulfo group or a carboxy group or a hydrophilic group thereof. It is preferable that

Next, as a Z-valent linking group represented by X, -N = N-,

[0050]

[Chemical 4]

Further, the dye residue represented by Dye is a dye residue of azo type, azomethyl type, indoaniline type, anthraquinone type, etc., and particularly preferably has a molecular weight of 600 or less.

On the other hand, the coupling dye-forming dye-providing substance is preferably one represented by the following general formula (10).

Formula (10) Cp ₂ —Y In the formula, Cp ₂ represents a coupler residue excluding an active hydrogen atom, and Y represents a group capable of leaving from the coupler during the coupling reaction, and preferably a small amount. Both have a hydrophilic group such as a sulfo group or a carboxy group or a group containing these hydrophilic groups, and particularly preferably a linear or branched alkyl group having a total number of carbon atoms of 8 or more. It is a group having or is a residue of a polymer chain.

As the coupler residue represented by Cp ₂ ,
Examples thereof include those represented by the following general formulas (11) to (15). Particularly preferred coupler residues are those having a molecular weight of 400 or less and substituted with a hydrophilic group such as a sulfo group or a carboxy group. Is mentioned.

[0055]

[Chemical 5]

In the above formula, R ₁₇ , R ₁₈ , R ₁₉ and R
₂₀ is R ₁ , R ₂ or R in the general formula (4).
₃ and R ₄ are the same as the groups represented, R ₂₁ is the same as the group represented by R ₅ in the above formula (5), and R ₂₂ , R ₂₃ and R ₂₄ are each represented by the above formula. It represents the same group as the group represented by R ₆ , R ₇ and R ₈ in (5).

Next, R ₂₅ is R ₉ in the general formula (6).
Represents the same group as the group represented by, and R ₂₆ represents the same group as the group represented by R ₁₀ in the general formula (6).

R ₂₇ , R ₂₈ , R ₂₉ and R ₃₀ are the same as the groups represented by R ₁ and R ₂ in the general formula (4).

Next, as the reducing dye-providing substance,
Examples thereof include compounds represented by the following general formula (16).

General formula (16) Z-SO ₂ -Dye In the formula, Z represents a reducing substrate which can be oxidized by an organic silver salt, and Dye represents a dye residue. Specific examples of dye-donor substances belonging to this type are described in, for example, JP-A-57-179.
It is described in No. 840.

Particularly preferred among these dye-donor substances are coupling dye-forming dye-donor substances.

Typical specific examples of the yellow dye-donating substance are given below.

[0063]

[Chemical 6]

[0064]

[Chemical 7]

[0065]

[Chemical 8]

[0066]

[Chemical 9]

[0067]

[Chemical 10]

[0068]

[Chemical 11]

[0069]

[Chemical 12]

The above-mentioned dye-providing substance used in the present invention is
Although it varies depending on the heat-developable photosensitive composition, coating conditions, processing method, etc., it is generally used in the range of 0.01 to 10 mol, preferably 0.1 to 2.0 mol per mol of the organic silver salt.

The dye-providing material used in the present invention is used by being contained in a photothermographic layer or other photographic constitutional layer. For example, the dye-donating substance is contained in the photothermographic layer as described in US Pat. As described in No. 2322027, it can be dissolved in a high boiling point solvent and contained. Further, in the dispersion method as described above, a low-boiling point solvent may be used in combination with the high-boiling point solvent, if necessary, to dissolve the dye-donor substance and form a photothermographic layer.

Examples of the above high boiling point solvent include -n-butyl phthalate, tricresyl phosphate, di-octyl phthalate, n-nonyl phenol and the like, and examples of the low boiling point solvent include methyl acetate and propionic acid. Butyl, cyclohexanol, diethylene glycol monoacetate and the like are known. These solvents may be used alone or as a mixture, and the dye-providing substance thus dissolved in the solvent is an anionic surfactant such as alkylbenzenesulfonic acid and alkylnaphthalenesulfonic acid and / or sorbitan. It can be mixed with an aqueous solution containing a hydrophilic binder such as gelatin containing a nonionic surfactant such as monolauric acid ester, emulsified and dispersed by a colloid mill or an ultrasonic dispersion device, and added to the photothermographic layer.

The above-mentioned high boiling point solvent is used in an amount capable of completely dissolving the dye-providing substance, but preferably in the range of 0.05 to 100 parts per 1 part of the dye-providing substance.

As a preferable dispersion method other than the above, there is a fisher dispersion. The term “fisher dispersion” means that a dye-providing substance having a hydrophilic component and a hydrophobic component in the same molecule is dissolved and dispersed in an alkaline aqueous solution. An organic solvent which is in this dissolution and dispersion and is compatible with water is added, and heating and stirring (homogenizer, ultrasonic dispersion, etc.)
Or with the aid of a surfactant. As the alkali of the alkaline aqueous solution, an inorganic base,
An organic base compatible with water can be used, and after the dye-donor substance is dissolved and dispersed, the pH can be adjusted if necessary. In this case, the pH adjusting agent may be an organic or inorganic acid compatible with water. The surfactant as a dispersion aid may be an anionic or nonionic surfactant, but an anionic surfactant is preferred.

The above-mentioned fisher dispersion is sometimes referred to as Agfar dispersion, and is referred to as British Patent Nos. 45555 and 4555.
The technical contents described in No. 65823 and No. 29897 can be referred to.

The heat-developable light-sensitive layer of the present invention contains a light-sensitive silver halide similar to the above-mentioned dye-providing substance.

As the photosensitive silver halide used in the present invention, silver chloride, silver bromide, silver iodide, silver chlorobromide, silver chloroiodide, silver iodobromide, silver chloroiodobromide or a combination thereof is used. Examples include a mixture. The photosensitive silver halide can be prepared by any method known in the photographic art, such as the single jet method and the double jet method. In the present invention, a conventional method for preparing a silver halide gelatin emulsion is used. A light-sensitive silver halide emulsion prepared in accordance with.

The photosensitive silver halide emulsion may be chemically sensitized by any method known in the photographic art. Examples of the sensitizing method include various methods such as gold sensitization, sulfur sensitization, gold-sulfur sensitization, and reduction sensitization.

The merocyanine dye has, in addition to the basic nucleus, an acidic nucleus such as a thiohydantoin nucleus, a rhodanine nucleus, an oxazolidinedione nucleus, a thiazolidinedione nucleus, a barbituric acid nucleus, a thiazoline thione nucleus, a malononitrile nucleus and a pyrazolone nucleus. May be. 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. Further, ascorbic acid derivative, azaindene cadmium salt, organic sulfonic acid and the like can be used in combination with a supersensitizing additive that does not absorb visible light as described in the specifications of, for example, U.S. Patent Nos. 2,933,390 and 2937089. I can.

The addition amount of these dyes is 1 × 10 ^-4 to 1 mol per mol of silver halide or a silver halide-forming component. More preferably, it is 1 × 10 ⁻⁴ to 1 × 10 ⁻¹ mol.

Organic silver salts used in the heat-developable color light-sensitive material of the present invention include Japanese Patent Publication Nos. 43-4924 and 44-26582.
Nos. 45-18416, 45-12700, 45-22185 and JP-A-49-52626, 52-31728, 52-13731, 52.
No. -141222, No. 53-36224, No. 53-37610 each publication, U.S. Pat.No. 3330633, No. 4168980 silver salts of aliphatic carboxylic acids described in the specification, for example, silver laurate,
Silver myristate, silver palmitate, silver stearate, silver arachidonate, silver behenate, etc., and aromatic carboxylic acid silver, such as silver benzoate, silver phthalate, etc., and silver salts having imino groups, for example, benzotriazole silver. A silver salt of a compound having a mercapto group or a thione group, such as silver Sutcalin, silver phthalazinone silver, and phthalimide silver, for example, 2-mercaptobenzo-oxazole silver, mercaptooxadiazole silver, mercaptobenzothiazole silver, 2-mercaptobenzimidazole silver, 3-mercapto-phenyl-1,2,4-
Triazole silver, and other 4-hydroxy-6-methyl-1,3,3a, 7-tetrazaindene silver, 5-methyl-7-hydroxy-1,2,3,4,6-pentazaindene silver, etc. Can be given.

RD16966 and 16907, British Patent No. 1590
It is also possible to use silver compounds as described in the specifications of 956 and 1590957. Among them, for example, a silver salt having an imino group such as a silver salt of benzotriazole silver is preferable, and examples of the silver salt of benzotriazole include alkyl-substituted benzotriazole silver such as silver methylbenzotriazole, for example, brom-benzotriazole silver and chloro. Halogen-substituted benzotriazole silver such as benzotriazole silver, amide-substituted benzotriazole silver such as 5-acetamidobenzotriazole silver, and compounds described in British Patent Nos. 1590956 and 1590957,
For example N- [6-chloro-4-N (3,5-dichloro-4-hydroxyphenyl) imino-1-oxo-5-methyl-2,5-cyclohexadien-2-yl] -5-carbamoylbenzo Triazole silver salt, 2-benzotriazol-5-ylazo-4-methoxy-
1-naphthol silver salt, 1-benzotriazol-5-ylazo
-2-Naphthol silver salt, N-benzotriazol-5-yl-4-
Examples thereof include (4-dimethylaminophenylazo) benzoamide silver salt.

Further, benzotriazoles represented by the following general formula (16) and benzotriazoles represented by the following general formula (17) can be advantageously used.

[0084]

[Chemical 13]

In the formula, R ₃₂ represents a nitro group, and R ₃₃ and R ₃₄ may be the same or different and each is a halogen atom (eg chlorine, bromine, iodine), a hydroxy group, a sulfo group or a salt thereof (eg. Sodium salt, potassium salt,
Ammonium salt), carboxy group or a salt thereof (for example, sodium salt, potassium salt, ammonium salt), nitro group, cyano group, or optionally substituted carbamoyl group, sulfamoyl group, alkyl group (for example, methyl group, Represents an ethyl group, a propyl group, an alkoxy group (for example, a methoxy group, an ethoxy group), an aryl group (for example, a phenyl group) or an amino group, and m is 0 to
2, n represents 0 or 1. Further, examples of the substituent of the carbamoyl group may include a methyl group, ethyl group, acetyl group and the like, and examples of the substituent of the sulfamoyl group may include methyl group, ethyl group, an acetyl group and the like, Examples of the substituent of the alkyl group include a carboxy group and an ethoxycarbonyl group, and examples of the substituent of the aryl group include a sulfo group and a nitro group.
As the substituent of the alkoxy group, for example, a carboxy group,
Examples of the substituents on the ethoxycarbonyl group and the amino group include an acetyl group, a methanesulfonyl group and a hydroxy group.

The compound represented by the general formula (16) 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-nitrobenzotriazole silver, 5-
Nitrobenzotriazole silver, 5-Nitro-6-chlorobenzotriazole silver, 5-Nitro-6-methylbenzotriazole silver, 5-Nitro-6-methoxybenzotriazole silver, 5
-Nitro-7-phenylbenzotriazole silver, 4-hydroxy-5-nitrobenzotriazole silver, 4-hydroxy-7-nitrobenzotriazole silver, 4-hydroxy-5,7-dinitrobenzotriazole silver, 4-hydroxy- 5-Nitro-6-chlorobenzotriazole silver, 4-hydroxy-5-nitro-6-
Methylbenzotriazole silver, 4-sulfo-6-nitrobenzotriazole silver, 4-carboxy-6-nitrobenzotriazole silver, 5-carboxy-6-nitrobenzotriazole silver, 4-carbamoyl-6-nitrobenzotriazole silver, 4 -Sulfamoyl-6-nitrobenzotriazole silver, 5-carboxymethyl-6-nitrobenzotriazole silver, 5-hydroxycarbonylmethoxy-6-nitrobenzotriazole silver, 5-nitro-7-cyanobenzotriazole silver, 5-amino- 6-nitrobenzotriazole silver, 5-nitro-7- (p-nitrophenyl) benzotriazole silver, 5,
7-dinitro-6-methylbenzotriazole silver, 5,7-dinitro-6-chlorobenzotriazole silver, 5,7-dinitro-6-
Examples thereof include methoxybenzotriazole silver.

[0088]

[Chemical 14]

In the formula, R ₃₅ is a hydroxy group, a sulfo group or a salt thereof (eg sodium salt, potassium salt, ammonium salt), a carboxy group or a salt thereof (eg sodium salt, potassium salt, ammonium salt) or a substituent. Represents a carbamoyl group which may have or a sulfamoyl group which may have a substituent, and R ₃₆ represents a halogen atom (eg chlorine, bromine, iodine), a hydroxy group, a sulfo group or a salt thereof (eg sodium salt, potassium salt). , Ammonium salts), carboxy groups or salts thereof (eg sodium salts, potassium salts, ammonium salts), nitro groups,
Represents a cyano group, or an alkyl group (eg, methyl group, ethyl group, propyl group), an aryl group (eg, phenyl group), an alkoxy group (eg, methoxy group, ethoxy group) or an amino group, each of which may have a substituent. , P
Represents 1 or 2, and q represents an integer of 0 to 2.

Examples of the substituent of the carbamoyl group for R ₃₅ include a methyl group, an ethyl group and an acetyl group, and examples of the substituent of the sulfamoyl group include a methyl group, an ethyl group and an acetyl group. Etc. can be given. Further, examples of the substituent of the alkyl group in R ₃₆ include a carboxy group and an ethoxycarbonyl group, examples of the substituent of the aryl group include a sulfo group and nitro group, and examples of the substituent of the alkoxy group include carboxy. Groups, ethoxycarbonyl groups, etc.
And as the substituent of the amino group, for example, an acetyl group,
Examples thereof include a methanesulfonyl group and a hydroxy group.

Specific examples of the organic silver salt represented by the general formula (17) include the following compounds.

For example, silver 4-hydroxybenzotriazole, silver 5-hydroxybenzotriazole, silver 4-sulfobenzotriazole, silver 5-sulfobenzotriazole, sodium benzotriazole-4-sulfonate, silver benzotriazole-5-sulfosulfonic acid Sodium, potassium benzotriazole-4-sulfonate, potassium benzotriazole-5-sulfonate, ammonium benzotriazole-4-ammonium sulfonate, silver benzotriazole-
5-Sulfonate ammonium, 4-carboxybenzotriazole silver, 5-carboxybenzotriazole silver, benzotriazole silver-4-carboxylate sodium, benzotriazole silver-5-carboxylate sodium, benzotriazole silver-4-carboxylate potassium, Benzotriazole silver-
Potassium 5-carboxylate, benzotriazole silver-4-carboxylate ammonium, benzotriazole silver-5-carboxylate ammonium, 5-carbamoylbenzotriazole silver, 4-sulfamoylbenzotriazole silver, 5-carboxy-6-hydroxybenzo Triazole silver, 5-carboxy-7-sulfobenzotriazole silver, 4-hydroxy-5-sulfobenzotriazole silver, 4-hydroxy-7-sulfobenzotriazole silver, 5,6-dicarboxybenzotriazole silver, 4,6- Dihydroxybenzotriazole silver, 4-hydroxy-5-chlorobenzotriazole silver, 4-hydroxy-5-methylbenzotriazole silver, 4-hydroxy-5-methoxybenzotriazole silver, 4-hydroxy-5-nitrobenzotriazole silver, 4 -Hydroxy-5-cyanobenzotriazole silver, 4-hydroxy-5-aminobenzotri Azole silver, 4-hydroxy-5-acetamidobenzotriazole silver, 4-hydroxy-5-benzenesulfonamide benzotriazole silver, 4-hydroxy-5-hydroxycarbonylmethoxybenzotriazole silver, 4-hydroxy-5
-Ethoxycarbonylmethoxybenzotriazole 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 -
Sulfo-5-cyanobenzotriazole silver, 4-sulfo-5-aminobenzotriazole silver, 4-sulfo-5-acetamidobenzotriazole silver, 4-sulfo-5-benzenesulfonamide benzotriazole silver, 4-sulfo-5- Hydroxycarbonyl methoxybenzotriazole silver, 4-sulfo-5
-Ethoxycarbonylmethoxybenzotriazole silver, 4
-Hydroxy-5-carboxybenzotriazole silver, 4-sulfo-5-carboxymethylbenzotriazole silver, 4-sulfo-5-ethoxycarbonylmethylbenzotriazole silver, 4-sulfo-5-phenylbenzotriazole silver, 4-sulfo -5- (p-Nitrophenyl) benzotriazole 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-chlorobenzotriazole silver, 4-
Carboxy-5-methylbenzotriazole silver, 4-carboxy-5-nitrobenzotriazole silver, 4-carboxy-5-
Aminobenzotriazole silver, 4-carboxy-5-methoxybenzotriazole silver, 4-carboxy-5-acetamidobenzotriazole silver, 4-carboxy-5-ethoxycarbonylmethoxybenzotriazole silver, 4-carboxy
-5-Carboxymethylbenzotriazole silver, 4-carboxy-5-phenylbenzotriazole silver, 4-carboxy-
Examples include 5- (p-nitrophenyl) benzotriazole silver, 4-carboxy-5-methyl-7-sulfobenzotriazole silver, and the like. Even if these compounds are used alone,
You may use it in combination of 2 or more types.

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

The amount of the organic silver salt used is 1 m ² of the support.
It is 0.05-10.0 g, preferably 0.2-2.0 g.

The reducing agent used in the heat-developable color light-sensitive material of the present invention is, for example, US Pat. No. 3531286.
No. 3761270, No. 3764328, RD12
146, RD15108, RD15127 and p-phenylenediamine-based and p-aminophenol-based developing agents described in JP-A-56-27132, etc., phosphoroamidophenol-based and alphonamidephenol-based developing agents, and hydrazone type Known color-developing agents such as color-developing agents or their precursors are mentioned, and particularly preferred is JP-A-56-1.
It is a p- (N, N-dialkylaminophenyl) sulfamic acid developing agent described in JP-A-46133 and JP-A-57-225928.

These reducing agents may be used alone or in combination of two or more. The amount of the reducing agent used depends on the type of the organic silver salt used, the type of the photosensitive silver salt, the type of other additives, etc., but usually ranges from 0.05 to 10 mol per mol of the organic silver salt. And preferably 0.1 to 3 mol.

Various additives can be added to the heat-developable color light-sensitive material of the present invention, if necessary, in addition to the above components. For example, as a development accelerator, US Pat.
No., No. 3531285, No. 401260, No. 4060420, No. 4088496, No. 4207392 each specification or RD15733,
The 15734, the alkaline release agents described in the 15776 No., etc., organic acids described in JP-B-45-12700, -CO described in U.S. Pat. No. _{3667959 -, - SO 2 -,} - SO- nonaqueous having a group There are polar solvent compounds, melt formers described in U.S. Pat. No. 3,348,776, polyalkylene glycols described in U.S. Pat. No. 3,666,477, and JP-A-51-19525. Further, as a color tone agent, for example, JP-A-46-4928, JP-A-46-6077, and JP-A-49-501.
No. 9, No. 49-5020, No. 49-91215, No. 49-107727, No. 5
0-2524, 50-67132, 50-67641, 50-114217
No. 52-33722, No. 52-99813, No. 53-1020, No. 53-
55115, 53-76020, 53-125014, 54-156523
No. 54, No. 54-156524, No. 54-156525, No. 54-156526,
55-4060, 55-4061, 55-32015, etc. and West German Patents 2140406, 2147063, 222061
No. 8, U.S. Pat.No. 3,080,254, No. 3847612, No. 37829
No. 41, No. 3994732, No. 4123282, No. 4201582 and the like, which are compounds described in the respective specifications, such as phthalazinone, phthalimide, pyrazolone, quinazolinone, N-hydroxynaphthalimide, benzoxazine, naphthoxazinedione. , 2,3-dihydro-phthalazinedione, 2,3-
Dihydro-1,3-oxazine-2,4-dione, oxypyridine, aminopyridine, hydroxyquinoline, aminoquinoline, isocarbostyril, sulfonamide, 2H-1,3-
Benzothiazine-2,4- (3H) dione, benzotriazine,
There are mercaptotriazole, dimercaptotetrapentalene, phthalic acid, naphthalic acid, phthalamic acid, etc.,
Mixtures of one or more of these with an imidazole compound, at least one of an acid or acid anhydride such as phthalic acid, naphthalic acid and a phthalazine compound, and further with phthalazine and maleic acid, itaconic acid, quinolinic acid. ,
Examples thereof include a combination of gentisic acid and the like. Further, 3-amino-5-mercapto-1,2,4-triazoles and 3-acylamino-5-mercapto-described in Japanese Patent Application Laid-Open Nos. 57-73215 and 57-76838 by the present applicant. 1,2,4-triazoles are also effective.

Further, examples of the antifoggant include, for example, Japanese Patent Publication No. 47-11113, JP-A-49-90118, and JP-A-49-10724.
49-97613, 50-101019, 49-130720, 50-1
No. 23331, No. 51-47419, No. 51-57435, No. 51-78227
No. 51, No. 51-104338, No. 53-19825, No. 53-20923, No. 5
1-50725, 51-3223, 51-42529, 51-81124
No. 54-51821, No. 55-93149, etc., as well as British Patent No. 1455721, US Patent No. 3885968, No. 370045.
7, 4137079, 4138265, West German patent 26179
The second mercuric salt, which is a compound described in each specification such as No. 07, or an oxidizing agent (for example, N-halogenoacetamide,
N-halogenosuccinimide, perchloric acid and salts thereof,
Inorganic peroxides, persulfates, etc.) or acids and salts thereof (eg, sulphonic acid, lithium laurate, rosin, ditepenic acid, thiosulfonic acid, etc.), or sulfur-containing compounds (eg, mercapto compound-releasing compounds, thiouracil, disulfide) , Sulfur alone, mercapto-1,2,4-triazole, thiazoline thione, polysulfide compounds, etc.), and other compounds such as oxazoline, 1,2,4-triazole, phthalimide, etc.

Further, as an antifoggant, JP-A-59-663 is used.
Hydrophilic benzotriazole derivatives described in No. 80 and No. 59-56506, for example, 4-sulfobenzotriazole, 5-carboxybenzotriazole, etc. or an oxidant having a phenolic hydroxyl group such as hydroquinone derivative is effective. The effect of preventing fog is further enhanced by using a hydrophilic benzotriazole derivative and a hydroquinone derivative together.

Further, a print outer inhibitor may be used as a stabilizer at the same time, for example, as described in JP-A-48-452.
No. 28, No. 50-119624, No. 50-120328, No. 53-46020, etc., halogenated hydrocarbons, specifically tetrabromobutane, tribromoethanol, 2-bromo-2-tolyl Examples thereof include acetamide, 2-bromo-2-tolylsulfonylacetamide, 2-tribromomethylsulfonylbenzothiazole, and 2,4-bis (tribromomethyl) -6-methyltriazine.

Japanese Patent Publication No. 46-5393 and Japanese Patent Laid-Open No. 50-54329.
Post-treatment may be carried out using a sulfur-containing compound as described in JP-A No. 50-77034.

Furthermore, US Pat. Nos. 3,301,678 and 350,
No. 6444, No. 3824103, No. 3844788 isothiuronium-based stabilizer precursor described in each specification, or U.S. Patent Nos. 3669670, 4012260, 406042
The activator stabilizer precursor described in the specification No. 0 and the like may be contained.

The heat-developable color light-sensitive material of the present invention further comprises, in addition to the above components, if necessary, a spectral sensitizing dye, an antihalation dye, a fluorescent whitening agent, a hardener, an antistatic agent, a plasticizer, and a spreading agent. Various additives such as agents and coating aids are added.

The photosensitive silver halide, the organic silver salt, the reducing agent, the dye-providing substance, the thermal solvent and the like which are the constituents of the present invention may be contained in the same layer, or the two layers which are in contact with each other. It may be contained separately.

In the heat-developable color light-sensitive material of the present invention, in addition to the above layers, it is preferable to provide an intermediate layer between the respective light-sensitive layers for the purpose of preventing color turbidity.

The above-mentioned intermediate layer may be a layer consisting of only a binder, but may also contain a thermal solvent, an organic silver salt or a reducing agent contained in the photosensitive layer, and a compound which scavenges an oxidant of the reducing agent. , (Abbreviated as Dp ′ scavenger) is preferable.

A particularly preferable compound as the Dp 'scavenger is a coupler having an immobile group in a substituent other than the active site. Preferred examples of the immobile group include groups having a total number of carbon atoms of 8 or more and / or polymer residues.

A specific example of the above-mentioned DP 'scavenger is described in, for example, Japanese Patent Application No. 58-237965.

As the binder used in the above intermediate layer, a hydrophilic or hydrophobic binder is used.
A binder used in the photosensitive layer is particularly preferable.

The layers containing the components of the present invention and other layers are coated on a wide variety of supports. Examples of the support used in the present invention include cellulose nitrate film, cellulose ester film, polyvinyl acetal film, polyethylene film, polyethylene terephthalate film, plastic film such as polycarbonate film and glass, paper, metal such as aluminum and the like. .. Also, baryta paper, resin coated paper, and water resistant paper can be used.

In addition to the above, a photographic constituent layer such as an overcoat layer, an undercoat layer, a backing layer or a filter layer may be provided.

The heat-developable color light-sensitive material of the present invention is subjected to imagewise exposure and then heat development to form an imagewise distribution of a heat transferable dye from the above-mentioned dye-donor substance, and at least a part of the imagewise distribution. Is transferred to an image receiving member having a stacking relationship with the light-sensitive material to form a color image.

Transfer of the dye to the above-mentioned image receiving member is carried out, for example, by using an organic solvent such as methanol, acetonitrile, dimethylformamide or the like, or water, or by thermal transfer using a thermal solvent, thermal transfer by sublimation of the dye itself, or the like. Although various transfer methods can be used, when the photosensitive material contains a thermal solvent, the dye can be transferred only by being brought into close contact with the image receiving member and heating.

The image receiving member may have a function of receiving the dye released or formed by thermal development, and it may be a mordant used in a dye diffusion transfer type light-sensitive material or a glass described in JP-A-57-207250. It is preferably formed of a heat-resistant organic polymer substance having a transition temperature of 40 ° C. or higher and 250 ° C. or lower.

Specific examples of the mordant include nitrogen-containing secondary and tertiary amines, nitrogen-containing heterocyclic compounds, quaternary cationic compounds thereof, US Pat. Nos. 2,548,564 and 2,484,430.
Nos. 3148061 and 3756814, vinyl pyridine polymers and vinyl pyridinium cation polymers, polymers containing dialkylamino groups disclosed in U.S. Pat.No. 2,675,316, and U.S. Pat. No. 2,882,156. Aminoguanidine derivatives, US Pat. No. 36
25694, 3859096, British Patent No. 1277453, 20110
Mordants capable of crosslinking with gelatin and the like disclosed in No. 12, aqueous sol type mordants disclosed in U.S. Pat.Nos. 3958995, 2721852, and 2798063, and disclosed in JP-A-50-61228. Water insoluble mordant, U.S. Pat.No. 3,788,855
Issue, West German patent application (OLS) No. 2843320, JP-A-53-30
328, 52-155528, 53-125, 53-1024, 5
4-74430, 54-12426, 55-22766, U.S. Patent No. 3
642485, 3488706, 3557066, 3271147,
3271148, 55-29418, 56-36414, 57-57
Various mordants disclosed in No. 12139 and RD12045 (1974) can be mentioned.

Particularly useful mordants are polymers containing ammonium salts and are described in US Pat. No. 3,709,690.
For example, the polymer containing ammonium salt is polystyrene-co-N, N, N-tri-n-hexyl-N-vinylbenzylammonium chloride, and the ratio of styrene to vinylbenzylammonium chloride is 1: 4 to 4: 1. , Preferably 1: 1.

A typical image receiving layer for dye diffusion transfer is obtained by mixing a polymer containing an ammonium salt with gelatin and coating the mixture on a support. A transfer solvent can be used for transferring the dye from the photothermographic layer to the image receiving layer. For this transfer solvent, low boiling point solvents such as methanol, ethyl acetate and diisobutyl ketone and high boiling point solvents such as tri-n-cresyl phosphate and di-n-butyl phthalate are used. It can be added to the image-receiving layer intermediately in gelatin using various emulsifiers.

Examples of the heat-resistant organic polymer substance include:
Polystyrene having a molecular weight of 2000 to 85000, polystyrene derivative having a substituent having 4 or less carbon atoms, polyvinylcyclohexane, polydivinylbenzene, polyvinylpyrrolidone,
Polyacetals such as polyvinyl carbazole, polyallylbenzene, polyvinyl alcohol, polyvinyl formal and polyvinyl butyral, polyvinyl chloride,
Chlorinated polyethylene, Polytrichlorofluorinated ethylene, Polyacrylonitrile, Poly-N, N-dimethylallylamide, p
-Cyanophenyl group, pentachlorophenyl group and 2,4
-Polyacrylate having dichlorophenyl group, polyacrylchloroacrylate, polymethylmethacrylate, polyethylmethacrylate, polypropylmethacrylate, polyisopropylmethacrylate, polyisobutylmethacrylate, poly-tert-butylmethacrylate, polycyclohexylmethacrylate, polyethyleneglycoldimethacrylate , Poly-2-cyano-ethyl methacrylate, polyesters such as polyethylene terephthalate, polysulfones, polycarbonates such as bisphenol A polycarbonate, polyanhydrides, polyamides and cellulose acetates. Also, Polymer Handbook 2nd cd. (J. Brandru
Synthetic polymers having a glass transition temperature of 40 ° C. or higher described in John Wiley & sons, p., EHImmergut, p. These polymer substances may be used alone or in combination of two or more and used as a copolymer.

Particularly useful polymers include cellulose acetates such as triacetate and diacetate, terephthalic acid with heptamethylenediamine, fluorangepropylamine and adipic acid, hexamethylenediamine and diphenic acid, hexamethylenediamine and isophthalic acid, and the like. Examples thereof include polyamides in combination, polyesters in combination with diethylene glycol and diphenylcarboxylic acid, polyesters in combination with bis-p-carboxyphenoxybutane and ethylene glycol, polyethylene terephthalate, and polycarbonate vinyl chloride. These polymers may be modified. For example, cyclohexanedimethanol, isophthalic acid, methoxypolyethylene
-Polyethylene terephthalate using glycol, 1,2-dicarbomethoxy-4-benzenesulfonic acid or the like as a modifier is also effective.

The above-mentioned polymer is dissolved in a suitable solvent and coated on a support to form an image-receiving layer, or a film-like image-receiving layer comprising the above-mentioned polymer is laminated on the support, or is used on the support. It is also possible to form the image-receiving layer by itself using a member (for example, a film) made of the above-mentioned polymer without coating the same on the image-receiving layer / support.

Further, the image receiving layer may be formed by providing an opaque layer (reflective layer) containing titanium dioxide dispersed in gelatin on the image receiving layer on a transparent support. With this opaque layer, a reflective color image can be obtained by viewing the transferred color image from the transparent support side of the image receiving layer.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the embodiments of the present invention are not limited thereto.

Example 1 (Preparation of 4-sulfobenzotriazole silver salt) 40 g of 4-sulfobenzotriazole and 8.0 g of sodium hydroxide were added to 500 ml of an ethanol-water (1: 1) mixture solution containing 40 g of polyvinylpyrrolidone. Added and dissolved. 5 in this solution
33 ml of regular silver nitrate was added dropwise. At this time, 5N sodium hydroxide solution was simultaneously added dropwise to maintain the pH at 7-8. The solution was stirred for 1 hour at room temperature and then adjusted to 600 ml with water to obtain a 4-sulfobenzotriazole silver solution.

(Preparation of Cyan Dye Donor-Containing Layer) Exemplified Dye Donor (C-3) 0.25 g and 2,5-di- (t-octyl) hydroquinone 0.02 g, and ethyl acetate 0.75 containing dioctyl phthalate 0.2 g. After being dissolved in g, added to 2.5 ml of 3.2% gelatin aqueous solution and dispersed by a homogenizer, water was added to 5 ml to obtain a dispersion liquid of a cyan dye-donor substance.

5 ml of the above dispersion and 6 ml of a silver 4-sulfobenzotriazole solution were mixed, and 0.32 of petriol was added.
g, polyethylene glycol (molecular weight 300) 0.16 g, and a developer of the following structure 0.28 g were added, and after finishing to 13.4 ml with water, silver halide having red sensitivity (average grain size 0.1
μm) was converted to silver and mixed with 1.6 ml of a silver halide emulsion containing 4.8 × 10 ⁻⁴ mol (containing 0.12 g of gelatin) to prepare a coating solution.

[0126]

[Chemical 15]

The coating solution prepared as described above was applied onto a polyethylene terephthalate base support so that the wet film thickness was 30 μm, and a cyan dye-donor-containing layer was applied as the first photosensitive layer.

(Preparation of First Intermediate Layer) 0.3 g of Dp 'scavenger having the following structure and 1% of di- (2-ethylhexyl) -2-
Sulfosuccinic acid aqueous solution 0.16 ml, water 0.5 ml, methanol 0.2
After mixing 0.5 ml, 1 ml of 1N sodium oxide solution was added, and then 2.5 ml of 8% gelatin aqueous solution was added.

The dispersion thus obtained was neutralized with 5% citric acid and then made up to 7 ml with water. 6 ml of a 4-sulfobenzotriazole silver solution was mixed with this dispersion, 0.32 g of petriol and 0.16 g of polyethylene glycol (molecular weight 300) were further added, and water was added to make 15 ml.

[0130]

[Chemical 16]

The coating solution for the first intermediate layer thus obtained was used as the above-mentioned first photosensitive layer (cyan dye-donor-containing layer).
The first intermediate layer was applied by coating so that the wet film thickness was 15 μm.

(Preparation of layer containing magenta dye-donor substance) Except that 0.36 g of the dye-donor substance (M-6) was used as the dye-donor substance and the light-sensitive silver halide was changed to the green-light-sensitive light-sensitive silver halide. Is a coating solution having the same composition as the coating solution for the cyan dye-donating substance-containing layer, and is coated on the first intermediate layer to a wet film thickness of 30 μm to provide a magenta dye as the second photosensitive layer. A substance-containing layer was applied.

(Preparation of Second Intermediate Layer) A coating solution prepared by further dispersing 0.1 g of a yellow dye having the following structure in the coating solution for the first intermediate layer was used to wet the magenta dye-donor-containing layer. The second intermediate layer was formed by coating so as to have a film thickness of 15 μm.

(Yellow dye)

[0135]

[Chemical 17]

(Preparation of Layer Containing Yellow Dye Donor) Except that 0.32 g of the dye-donor substance (Y-3) was used as the dye-donor substance and the blue-sensitive photosensitive silver halide was used instead of the light-sensitive silver halide. A yellow dye as a third photosensitive layer is prepared by applying a coating solution having the same composition as the coating solution for the cyan dye-donor-containing layer on the second intermediate layer so as to have a wet film thickness of 30 μm. A donor substance-containing layer was applied.

(Preparation of Protective Layer) A coating solution having the same composition except that 4-sulfobenzotriazole silver was removed from the coating solution for the first intermediate layer was used to wet the yellow dye-donor-containing layer. A protective layer was formed by coating so that the film thickness was 10 μm.

The heat-developable color light-sensitive material obtained as described above was dried and then subjected to 1600 C.MS white exposure, blue exposure, green exposure and red exposure through a step wedge.

Then, on the coated surface of the above-exposed sample, an image receiving paper in which vinyl chloride was applied on baryta paper was superposed, and the surface was heated under pressure with a metal heat block having a surface temperature of 150 ° C. for 60 seconds. Density Dmax and Dmin (maximum density and fog density) of the dye image peeled off and transferred to the image receiving paper
Was measured with blue light, green light and red light, and the obtained results are shown in Table 1 below.

[0140]

[Table 1]

The total amount of binder in the heat-developable color light-sensitive material of the sample measured was about 5.2 g per 1 m ² of the support, the total amount of gelatin was about 1.7 g, or the total amount of the thermal solvent was about 4.2 g. It is a photosensitive material according to the invention.

As is clear from the above table, the heat-developable color light-sensitive material of the present invention not only has a high maximum density of a transferred image and a low minimum density (fog density), but also has excellent color separation properties. I understand that

Example 2 Except that the total amount, kind, gelatin amount and hot solvent amount (between the hot solvent amount and the total binder amount was 80% by weight were constant) of the binders were changed as described in Table 2 below. Prepared a sample exactly as in Example 1, and
Exposure and heat development were performed in the same manner as in. The density of the dye image transferred on the image receiving paper was measured in the same manner as in Example 1, and the obtained results are shown in Table 2 below.

[0144]

[Table 2]

In the above table, PVP represents polyvinylpyrrolidone and PVA represents polyvinyl alcohol. Also Dmax
Represents the maximum density and Dmin represents the minimum density (fog density).

From the results of the above table, the sample according to the present invention (sample
In Nos. 1 to 4), it is possible to obtain a transferred image with high density and low fog and excellent color separation, but a comparative sample (Sample No. 5) having a smaller amount of binder than the sample of the present invention.
Shows that the color separation property is poor, and the comparative sample (Sample No. 6) in which the amount of the binder is too large has increased fog and the dye transferability from the lower layer is poor.

Example 3 As described in Table 3 below, a sample was prepared in the same manner as in Example 1 except that the type and amount of the thermal solvent was changed, and the exposure and heat development were performed in the same manner as in Example 1. The results obtained are shown in Table 3.

[0148]

[Table 3]

As is clear from the above table, in Samples 9 and 10 in which the sample according to the present invention contained the same amount of the thermal solvent as in Example 1, the thermal transfer properties were excellent, the maximum density was high, and fog A transfer image having a low color separation is also obtained, and in the case of the sample (sample No. 8) having a relatively small amount of thermal solvent, an image having a transfer density inferior to those of the above-mentioned samples No. 9 and 10 is obtained. I understood it. It was also understood that when the amount of the hot solvent was increased, an image having an excellent transfer density was obtained, but fog was slightly increased.

[0150]

The amount of hydrophilic binder used is 1 m ^{2 of the} support.
The heat-developable color light-sensitive material having a multi-layer structure characterized in that it has a high density and a low fog as well as a transfer image excellent in color separation,
Further, by containing an appropriate amount of a hot solvent, an image having excellent transferability can be obtained.

Claims (1)

Claims: What is claimed is: 1. A layer comprising at least a blue-sensitive silver halide, a reducing agent, a yellow dye-donor and a binder on a support, at least a green-sensitive silver halide, a reducing agent, In a multi-layer heat-developable color light-sensitive material having a layer containing a magenta dye-donor and a binder, and at least a layer containing a red light-sensitive silver halide, a reducing agent, a cyan dye-donor and a binder, the binder is gelatin and at least One or more hydrophilic binders, and the amount of the binder is 3 g to 1 per 1 m ^{2 of the} support.
A heat-developable color light-sensitive material, which is 0 g.