JPS60201340A - Thermodevelopable color photosensitive material - Google Patents

Abstract

PURPOSE:To enable an image high in density to be transferred with high image stability even on paper not specially treated, by forming a heat-meltable outer layer contg. a heat-meltable material on a photographic constituent layer. CONSTITUTION:A heat-meltable layer is formed as the outer layer on a photographic constituent layer having a photosensitive element on a suport, and this heat-meltable layer is made of a heat-meltable material alone or together with a binder, and it may contain various additives. Said heat-meltable material is substantially colorless or white, good in compatibility with a dye to be transferred, and in affinity to an image-receiving element. It is solid or semi-solid at room temp., and it is selected mainly in accordance with the nature of the dye to be transferred and that of the image receiving element, and used in an amt. of 5- 500%, preferably, 10-300% of the binder of the photosensitive layer. As the binder optionally used for the heat-meltable layer is selected from hydrophilic and hydrophobic binders in accordance with the heat-meltable material.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a novel heat-developable color light-sensitive material, and more particularly, the present invention relates to a novel heat-developable color light-sensitive material (element), and more particularly, to a heat-developable color light-sensitive material (element) in which an imagewise distribution of a diffusible dye released or formed is detected. It relates to a heat-developable color photosensitive material that obtains an image by thermally transferring it to an element, and more specifically, it relates to a heat-developable color photosensitive material that can obtain a transferred image on plain paper or the like without the need for a specially processed image-receiving element. This invention relates to developing color photosensitive materials.

[Prior art]

The conventionally known color photography method using photosensitive silver halide is superior to other color photography methods in terms of photosensitivity, gradation, image quality, etc., and is the most widely put into practical use. It has been. However, in this method, wet processing is used for steps such as development, bleaching, fixing, and washing, which is time-consuming and labor-intensive, and there are concerns that processing chemicals may pose a threat to the human body. In addition, there are many other problems, such as concerns about contamination of the processing chamber and workers by processing chemicals, and the labor and cost of waste liquid processing.

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 photosensitive material comprising an organic silver salt, silver halide, and a developer. Furthermore, many heat-developable color photosensitive materials are also known, which are based on this heat-developable black-and-white photosensitive material.

For example, U.S. Patent Nos. 3,531,286 and 3,761.
．． No. 270, No. 3,764,328, Research Disclosure (hereinafter abbreviated as RD) No. 115108, No. 15127, No. 11204. lj and N1116
479, etc., which contain a photographic coupler and a color developing agent in a heat-developable light-sensitive material, are listed in the US W "No. 3.
No. 180.731, RDm13443 and Fla.
14347 etc. use leuco dye,
U.S. Patent No. 4,235,957, RDNa14433
, 4th floor 14448, same N1115227, 4th floor 1577
6, N1118137 and 4th floor 19419, etc.
U.S. Patent No. 4, which applies the scissors dye bleaching method,
No. 124,398, No. 4.124゜387 and No. 4
, 123.273 each describes a thermal bleaching method for heat-developable photosensitive materials. However, these proposals regarding heat-developable color photosensitive materials make it difficult to bleach or fix black and white recorded images formed at the same time. In some cases, it is not possible at all, and even if it is possible, it requires wet processing. Therefore, these proposals have many drawbacks, such as difficulty in obtaining clear color images and the need for intensive labor.

As a method that improves the above-mentioned drawbacks, a heat-developable color photosensitive material is proposed in which a color image is obtained by transferring the diffusible dye released during heat development.
No. 186744, No. 57-198458, No. 57-2
No. 07250, No. 58-40551, No. 58-585
No. 43, and also published by the present inventors in Publication No. 59=12431 and Japanese Patent Application No. 57-22964.
9Jii! - It is also indicated in each specification etc. These proposals suggest that 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.
A color image is obtained by transferring the dye to an image-receiving layer, and is referred to herein as a "dye-releasing type."

On the other hand, Japanese Patent Application No. 57-229671 by the present inventors,
58-333634. The proposal shown in each specification of No. 58-33364 is that a colorless or light-colored dye-donating substance is
A color image is obtained by reacting with an oxidized color developing agent generated by a heat development reaction of an organic silver salt to form a heat-diffusible dye, and transferring the dye to an image-receiving layer to obtain a color image. calls this the "pigment-forming type."

Regardless of the dye-releasing type or dye-forming type, in the method in which the dye is diffused and transferred by heat and an image is formed by the transferred dye, there are various factors such as image density, image fixability, image heat,
A specially processed image-receiving sheet (image-receiving element) is used for stability against light, humidity, etc., or for adjusting the color tone of an image. This image-receiving sheet has an image-receiving layer on a support, and it is sufficient that the image-receiving layer has the function of receiving the dye released or formed by heat development, and is suitable for color diffusion transfer type photosensitive materials. Mordant used and JP-A-57-20725
The glass transition temperature described in No. 0 etc. is 40℃ or higher 250
It is preferable to use a material made of a heat-resistant organic polymer material having a temperature of 0.degree. The compounds described in are known.

Recently, without using the specially processed image receiving sheet as mentioned above,
Attempts have been made to form transferred images on so-called plain paper, etc., but with conventional heat-developable color photosensitive materials, this results in deterioration of image density and deterioration of image fixability and stability.
It has been difficult to obtain stable images with sufficient density on plain paper and the like.

Therefore, there has been a demand for the development of a diffusion transfer type heat-developable color photosensitive material that can form transferred images on plain paper or the like that has not been specially processed.

[Purpose of the invention]

An object of the present invention is to provide a diffusion transfer type heat-developable color photosensitive material that can form a transferred image while maintaining high transfer density and image stability even on paper that has not been specially processed. It is in.

[Structure of the invention]

As a result of intensive research to achieve the above object, the present inventors have found that at least a photosensitive, logenated button, an organic silver salt, and a dye that can release or form a diffusible dye upon heat development have been developed. In a heat-developable color light-sensitive material having a photographic constituent layer containing a donor substance, a reducing agent, and an interlayer, the outer layer of the photographic constituent layer is a heat-fusible layer containing a heat-fusible compound. The inventors have discovered that the above object can be achieved and have completed the present invention. That is, in the present invention, the heat-fusible substance contained in the heat-fusible layer is transferred to the image-receiving element together with the transfer of the diffusible dye during thermal development, and the heat-fusible substance promotes the dyeing of the dye to the image-receiving element. , or the heat-melting substance receives the dye by adsorption, dissolution, etc., and transfers the dye to an image-receiving element (for example, plain paper, etc.) whose surface is not specially processed such as a dyed layer. be able to. Furthermore, providing a heat-fusible layer increases adhesion with the image-receiving element, increases transfer density, and has the effect of improving peelability.The present invention will be explained below in detail.In general, heat-developable color photosensitive materials are By using a combination of a light-sensitive element and an image-receiving element, it is possible to obtain a color dye image on the image-receiving element. Of the two elements, the present invention is characterized by the photosensitive element, and therefore, the photosensitive element of the present invention can be used in combination with known image receiving elements such as plain paper that has not been specially processed. Even if there is, it is clear that it falls within the technical scope of the present invention. The relationship between the photosensitive element of the present invention and the image-receiving element may be in any conventionally known form.For example, (1) the photosensitive element of the present invention may be in a stacked relationship with the image-receiving element during thermal development. (2) the photosensitive element of the present invention is of a type in which an image receiving element is placed in a stacked relationship during thermal transfer after thermal development, and (3) the photosensitive element of the present invention The receiving element may be integrally provided on the photographic constituent layer, and imagewise exposure and thermal development may be performed through the receiving element; (a) The image receiving element may be peeled off after thermal transfer, or (b) The image receiving element may not be peeled off after thermal transfer.

Oka, in the present invention, any of the above-mentioned forms can be preferably applied to the form of diffusion transfer using plain paper, etc. that has not been specially processed as an image receiving element. The photosensitive element is characterized by having a heat-fusible layer as an outer layer of photographic constituent layers formed on a support. Here, the outer layer has the following meaning. [1] When the photosensitive element of the present invention is constructed separately from the image-receiving element [format (1) or (2) above], the layer farthest from the support is referred to as the outer layer; [2] The present invention In the case of a type in which the photosensitive element is integrally formed with the image receiving element (format (3) above), the layer on the boundary side with the image receiving element is referred to as the outer layer. Note that when an opaque layer or the like is provided, this layer is considered to be a layer on the image receiving element side.

In the configuration [1] above, a layer (such as a film-retaining layer) that does not inhibit the effects of the heat-fusible layer may be provided on the heat-fusible layer of the present invention, and further The thermofusible layer may be composed of two or more layers. The same applies to the case [2] above.

The heat-fusible layer is composed of a heat-fusible substance alone or a heat-fusible substance and a binder, and may further contain various additives.

The heat-melting material of the present invention is substantially colorless or white;
It is a solid or semi-solid substance at room temperature that has good compatibility with the dye to be transferred and good affinity with the image-receiving element. Preferably above 30°C and below 250°C (more preferably 4°C
It is a substance that melts or softens when heated at temperatures between 0°C and 180°C, such as esters of higher fatty acids (such as ethyl stearate and ethyl behenate), wax e!
(e.g. carnauba wax, beeswax, etc.), amides (e.g. acetamide, acetamide, octadecanamide, propionamide, etc.), alcohols (e.g. 1-octadecanol, 1-eicozanol, 1,12-toticanediol, 1.6 -hexanediol, etc.), amines (
For example, 4-dodecylaniline, octadecylamine, etc.)
, ureas (e.g. dimethylurea, diethylurea,
diphenylurea, etc.), or polymers such as polyethylene glycol and poly-1,4-butylene adipate.

These thermofusible materials are selected primarily depending on the nature of the dye being transferred and the nature of the receiving element.

The content of the heat-melting substance in the present invention is 5% of the amount of binder in the photosensitive layer - 500K, preferably 1O - 300K.
It is 9N.

Two or more of the heat-melting substances of the present invention may be used in combination, and they may be dissolved in an appropriate external solvent and applied alone or together with an appropriate inder, or applied without using a solvent by a hot-melt method or the like. can do.

The heat-fusible layer formed by this method has a thickness of 0.0
1 pm to 500 ttm, preferably 0.5 μm to 1
00 μm.

The binder that may be used in the heat-fusible layer may be selected from hydrophilic binders and hydrophobic binders depending on the heat-fusible substance of the present invention, such as polyvinyl butyral, polyvinyl acetate, polyvinyl alcohol,
Polyvinylpyrrolidone, polystyrene, styrene-butadiene copolymer, cellulose esters (ethyl cellulose, etc.), acrylic resins (methyl methacrylate, etc.), gelatin, etc. can be used. Further, the heat-melting substance can also serve as a binder.

Various additives can be further added to the heat-fusible layer of the present invention. Examples of additives include antioxidants, ultraviolet absorbers, quenching substances, and when the diffusible dye released or formed from the dye donor is a chelatable dye, a metal that forms a chelate with the dye. Ions (e.g. copper (Il), nickel (II), aluminum (t))
, cadmium (Il), conorct (Il), chromium (
It), etc.) may be added, in which case a stable chelate dye image is obtained in the image-receiving element.

Further, the heat-fusible layer of the present invention may contain a substance that facilitates thermal peeling from the photographic constituent layers of the light-sensitive element.

Next, the photographic constituent layers of the present invention will be explained. The photographic constituent layer has at least one heat-developable photosensitive layer, and may have two or more photosensitive layers having different color sensitivities as necessary, an undercoat layer, a backing layer, etc. , an intermediate layer, or a filter layer.

The photosensitive layer basically contains each of the following components: photosensitive I, silver halide, organic silver salt, dye-providing substance, reducing agent, and binder; however, all the components may not necessarily be contained in one layer. It does not need to be configured as such. For example, the dye-providing substance may be contained in a layer adjacent to a photosensitive layer containing other components, or separately contained in two or more layers so that each component can react.

The photosensitive silver halide used in the present invention includes silver chloride, silver bromide, silver iodide, silver chlorobromide, silver chloroiodide, silver iodobromide, silver chloroiodobromide, or a mixture thereof. etc. can be mentioned. 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 silver halide gelatin emulsion preparation method is used. Light-sensitive silver halide emulsions prepared according to the method give 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 0.001 μm to about 1.5 μm; The thickness is approximately 1,01 μm to approximately 0.5 μm.

The photosensitive silver halide emulsion prepared as described above can most preferably be applied to a heat-developable photosensitive layer.

In the present invention, as a method for preparing silver halide, a photosensitive silver salt-forming component is allowed to coexist with an organic silver salt,
It is also possible to form photosensitive silver halide in a part of the silver salt. As a silver salt-forming component used in this manufacturing method, an inorganic halide, for example, a halide represented by MXn (where Mil: H atom, '
Represents an NHq group or a metal atom, X is C1, Br
Or in IXn, M is a H atom.

When it is an NTI++ group, it is 1, and when M is a metal atom, it shows its valence. Metal atoms include lithium, sodium,
Potassium, rubidium, cesium, copper, gold, iridium, magnesium, calcium, strontium, barium, zinc, cadmium, mercury, aluminum, indium, lanthanum, ruthenium, thallium, germanium,
tin, lead, antimony, bismuth, chromium, molybdenum,
Examples include tungsten, manganese, rhenium, iron, cobalt, nickel, rhodium, palladium, osmium, iridium, platinum, and cesium. ), halogen-containing metal complexes (for example, 2PtC1,6, K2PtBr6).

HAuC2++, (NH++)2IrCAg*
(NHq)5IrC16.

(NHu)2Rucz6, (NHu)qRuC16
, (fJHll)5RhC4+ (NHu)3R110
r6, etc.), onium halides (e.g., quaternary ammonium halides such as tetramethylammonium furomite, trimethylphenylammonium bromide, cetylethyldimethylammonium bromide, 3-methylthiazolium bromide, trimethylbenzylammonium bromide, detraethyl phosphorus), quaternary phosphonium halides such as nium bromide, tertiary sulfonium halides such as benzylethylmethyl bromide, 1-ethylthiazolium bromide, etc.), halokenized hydrocarbons (e.g. iodoform, bromoform tetrabromide, etc.) , 2-bromo-2-methylpropane, etc.), N-halogen compounds (N-chlorocobal #I14 mido, N-bromosuccinimide, N-bromphthalimide, N-
Bromoacetamide, N-iodosuccinimide, N-
fromophthalazinone, N-chlorophthalazinone, N-bromoacetanilide, N,N-dibromobenzenesulfonamide, N-promo N-methylbenzenesulfonamide, 1,3-dibromo-4,4-dimethylhytantoin, etc.) , other halogen-containing compounds (e.g. triphenylmethyl chloride, elevated), lJ phenylmethyl, 2-
bromobutyl alcohol, 2-bromoethanol, etc.).

These photosensitive silver halides and photosensitive silver salt-forming components can be used in combination in various methods, and are preferably used in amounts ranging from 0.001 mol to 2.0 mol per mol of the organic silver salt. The amount is 0.01 mol to 0.5 mol.

Further, the heat-developable photosensitive layer of the present invention has a multilayer structure including each layer sensitive to blue light, green light, and red light, that is, a heat-developable blue-sensitive layer, a heat-developable green-sensitive layer, and a heat-developable red-sensitive layer. The blue-sensitive silver halide emulsion, the green-sensitive silver halide emulsion, and the red-sensitivity silver halide emulsion are each used by adding various spectral sensitizing dyes to the halide emulsion. can be obtained by adding

A (typical spectral sensitizing dye) used in the present invention is, for example, cyanine, merocyanine, complex (3
Nuclear or tetranuclear) cyanine, holopolar cyanine, styryl, hemicyanine, oxonol, and the like. Among cyanine pigments, thiazoline, oxazoline,
Pyrroline, pyridineoxazole, thiazole, selenazole, imidazole, which have various basic nuclei,
yo) preferred. Such a nucleus may contain an argyl group, an alkylene group, a hydroxyalkyl group, a sulfoalkyl group, a carboxyalkyl group, an aminoalkyl group or an enamine group capable of forming a fused carbocyclic or heterocyclic ring. good. Further, it may be symmetrical or asymmetrical, and the methine chain or polymethine chain may have an alkyl group, phenyl group, enamine group, or hetetetracyclic substituent.

In addition to the above-mentioned basic nucleus, merocyanine dyes have acidic nuclei such as thiohydantoin nucleus, rotanidine nucleus, oxazoline dione nucleus, thiazolidine dione nucleus, barbylic acid nucleus, thiazolinthione nucleus, malonitrile nucleus, and pyrazolone nucleus. It's okay. These acidic nuclei may be further substituted with an alkyl group, an alkylene group, a phenyl group, a carboxydialkyl group, a sulfoalkyl group, a hydroxyalkyl group, an alkoxyalkyl group, an alkylamine group or a peterocyclic nucleus. If necessary, these dyes may be used in combination. Uta includes ascorbic acid derivatives, azaindene cadmium salts, organic sulfonic acids, etc., for example, U.S. Patent Nos. 2.933.390 and 2.937.0.
An instant sensitizing additive that does not absorb visible light, such as those described in the specification of No. 89, can be used in combination.

The amount of these dyes added is IX10-'' mole-1 mole per mole of silver halide or silver halide-forming component. More preferably, it is IX10-'' mole-1X10 mole.

As the organic silver salt used in the present invention, Japanese Patent Publication No. 43-4
924-P-1 No. 44-26582, No. 45-184
No. 16, No. 45-12700, No. 45-22185 and JP-A-49-52626, No. 52-31728
No. 52-13731, No. 152-141222, No. 53-36224, No. 53-37610, U.S. Patent No. 3.330.633, U.S. Patent No. 4,168.
Silver salts of aliphatic carboxylic acids such as silver laurate, silver myristate, silver valmitate, silver stearate, silver arachidonate, silver behenate, etc., and aromatic carboxylic acids described in specifications such as No. 980 Silver, such as silver benzoate, silver phthalate, etc., or a silver salt having an imino group, e.g. Silver 2-mercaptobenzo-oxazole, silver mercaptooxadiazole, silver mercaptobenzothiazole, silver 2-mercaptobenzimitazole, silver 3-mercapto-phenyl-1,2,4-)riazole, and as others 4-hydroxy -6-methyl-1,3,38,7-titrazaindene silver, 5-methyl-7-hydroxy-1,2,3°4.6-pentazaindene silver, and the like.

Also, RD1696.6, RD16907, British Patent No. 1.
Various silver compounds described in No. 590.955 and No. 1.590.957 may also be used - among which silver salts with imino groups are preferred, such as silver salts of benzotriazole; As silver salt,
Alkyl-substituted benzotriazole silver such as methylbenzotriazole silver, e.g. bromo-benzotriazole steel, halogen-substituted benzotriazole silver such as chlorobenzotriazole silver, amide-substituted such as e.g. 5-amide-substituted benzotriazole steel. benzo) I
J Azole Silver, also British Patent No. 1.590.956;
No. 1,590.957 Compounds described in each specification, such as N-[6-chloro-4-N(3,5-dichloro-4
-hydroxyphenyl)imino-1-oxo-5-methyl-2,5-cyclohexadien-2-yl]-5-carbamoylbenzotriazolegindan, 2-benzotriazol-5-ylazo-4-methoxy-1-naphthol Silver salt, 1-benzotriazol-5-ylua/-2-1
-phthol salt, N-benzotriazol-5-yl-
Examples include 4-(4-dimethylaminophenylazo)benzamide silver group.

Further, nitrobenzotriazoles represented by the following general formula (1) and benzotriazoles represented by the following general formula can be advantageously used.

General formula (1) In the formula, R1 represents a nitro group, and R2 and R' may be the same or different, and each represents a halogen atom (including halogen, bromine, iodine), a hydroxy group, a sulfo group, or a salt thereof. (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 carbamoyl group, each of which may have a substituent, sulfamoyl groups, alkyl groups (e.g. methyl groups,
ethyl group, propyl group), alkoxy group (e.g. methoxy group, ethoxy group), aryl group (e.g. phenyl group)
or represents an amino group, m represents 0 to 2, and n represents 0 or 1. 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,
For example, as a substituent for an ethoxycarbonyl group, a sulfo group, a nitro group, etc., for an alkoxy group,
Examples of the Pj substituent include a levoxy group and an ethoxycarbonyl group, and examples of substituents for an amino group include an acetyl group, a methanesulfonyl group, and a hydroxy group. The compound represented by ) 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-nitropenzotriazole silver, 5-2) o-5-chloropenzotriazole silver, 5-2) b-5-methylbenzotriazole steel, 5-nitro-6-methylbenzotriazole Silver, 5-nitro-7-phenylbenzotriazole silver, 4
-Hydroxy-5-nitrobenzotriazole silver, 4-
Hydroxy-7-nitrobenzotriazole silver, 4-hydroxy-5,7-sinitrobenzotriazole silver, 4
-Hydroxy-5-nitro-6-10lupensotriazole silver, 4-hytosexy 5-nitro-6-methylbenzotriazole silver, 4-sulfo-6-nitrobenzotriazole silver, 4-carboxy-6-nitrobenzotriazole Silver, 5-carpoΦcy 6-nitrobenzotriazole silver, 4-carbamoyl-6-nitrobenzotriazole silver, 4-sulfamoyl-6-nitrobenzotriazole silver, 5-carboxymethyl-6-nitrobenzotriazole silver, 5- Hydroxycarbonylmethoxy-6
-Silver nitrobenzotriazole, 5-nitro-7-diatubenzotriazole, 5-amino-6-210 benzotriazole chain, 5-nitro-7-(p-nitrophenyl)hensitriazole silver, 5,7 -Dinito tff-
6~Methyl pen 7”) IJ azole silver, 5,7-dinitotff-6-chloroquinone triazole 6L
Examples include silver sl 7-dinitro-6-methylbenzotriazole.

General formula (...) In the formula, R1' is 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 carbamoyl group that may have a substituent or a sulfamoyl group that may have a substituent, and R5 is a --logon atom ( Example λ is 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. J, t? sodium salt, potassium salt, ammonium salt) , a nitro group, a cyano group, or an alkyl group (e.g., λ is a methyl group, an ethyl group, a propyl group), each of which may have a substituent, an alkyl group (e.g., a phenyl group), an alkoxy group (e.g., th methoxy group, ethoxy group) or amino group, p represents 1 or 2, and q represents an integer of 0 to 2.

Further, examples of substituents for the carbamoyl group in R' 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. be able to. Further, as a substituent for the alkyl group in R5, for example, a carboxy group, an ethoxycarbonyl group, etc., as a substituent for the aryl group, for example, a sulfo group, a nitro group, etc., and as a substituent for the alkoxy group, for example, a carboxy group. , an ethoxycarbonyl group, etc., and examples of substituents for the amino group include an acetyl group, a methanesulfonyl group, a hydroxy group, and the like.

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

Examples include silver 4-hydroxybenzotriazole, silver 5-hydroxybenzotriazole, silver 4-sulfobenzotriazole, silver 5-sulfobenzotriazole, silver sodium benzotriazole-4-sulfonate, silver sodium benzotriazole-5-sulfonate. , silver benzotriazole-4-potassium sulfonate, silver benzotriazole-5-potassium sulfonate, silver benzotriazole-4-ammonium sulfonate, silver benzotriazole-5-ammonium sulfonate, 4-carboxybenzotriazole silver, 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, ammonium benzotriazole silver-5-carboxylate, 5-carbamoylpenzotriazole silver, 4-sulfamoylbenzotriazole, 5-carboxy-6-hydroxybenzotriazole silver, 5-carboxy 7-sulfobenzotriazole silver, 4-hydroxy-5-sulfobenzotriazole silver, 4- Hydroxy, -7-sulfobenzotriazole L5. 6-dicarboxybenzotriazole M, 4.6-dihydroxybenzotriazole silver, 4
-Hydroxy-5-chloromanzotriazole, 4-
Hydroxy-5-methylbenzotriazole silver, 4-hydroxy-5-methoxybenzotriazole silver, 4-hydroxy-5-nitrobenzotriazole silver, 4-hydroxy-5-cyanobenzotriazole silver, 4-hydroxy-5-amino Silver benzotriazole, 4-hydroxy-5-acetamidobenzotriazole silver, 4-hydroxy-5-benzenesulfonamidobenzotriazole silver, 4-hydroxy-5-hydroxycarbonylmethoxybenzotriazole silver, 4-hydroxy-united ethoxycarbonylmethoxy Silver benzotriazole, 4-hydroxy-5-carboxymethylbenzotriazole silver, 4-hydroxy-5-ethoxycarbonylmethylbenzotriazole L 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-
Silver methoxybenzotriazole, Silver 4-sulfo-5-cyanobenzotriazole, Silver 4-sulfo-5-aminobenzotriazole, Silver 4-sulfo-5-acetamidobenzotriazole, Silver 4-sulfo-5-benzenesulfonamidobenzotriazole , 4-sulfo-5-hydroxycarbonylmethoxybenzotriazole silver, 4-sulfo-5-ethoxycarbonylmethoxybenzotriazole silver, 4-hydroxy-5-carboxybenzotriazole silver, 4-sulfo-5-carboxymethylbenzotriazole silver, 4-Sulfo-5-ethoxycarbonylmethylbenzotriazole silver, 4-sulfo-5-7x =
silver rubensotriazole, 4-sulfo-5-(p-nitrophenyl)ben:/ ) +777-yl silver, 4-sulfo-5-(p-sulfophenyl)benzotriazole silver, 4-sulfo-5-methoxy -6-chlorobene/ )
IJ Azole silver, 4-sulfo-5-chloro-6-carboxybenzotriazole silver, 4-carboxy-5-chlorobenzotriazole silver, 4-carboxy-5-methylbenzotriazole silver, 4-carboxy-5-nitropene silver zotriazole, silver 4-carboxy-5-7 minobenzotriazole, silver 4-carboxy-5-methoxybenzotriazole, silver 4-carboxy-5-amidebenzotriazole, silver 4-carboxy-5-ethoxybenzotriazole Carbonylmethoxybenzotriazole silver, 4-carboxy-5-carboxymethylbenzotriazole silver,
4-carboxy-5-phenylbenzotriazole silver,
Examples include silver 4-carboxy-5-(p-nitrophenyl)penzotriazole and silver 4-carboxy-5-methyl-7-flufopenzotriazole. 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 group may be isolated and used by dispersing it in shibainter by an appropriate means, or it may be used by dispersing it in an appropriate manner. The silver salt may be prepared in a suitable binder and used as is without isolation.

The amount of the organic silver salt used is 0.05 g to 1 per 12 supports.
The amount is 0.0 g, preferably 0.2 g to 2.0 g.

The dye-providing substance used in the present invention is a compound capable of releasing or forming a diffusible dye upon thermal development. Here, 1 Diffusivity 1 means the property that the dye released or formed from the donor substance described below in ^1■ can migrate from the layer containing the dye donor substance to an adjacent layer in a stacked relationship, Regarding the mode of movement with the dye, for example, if the produced dye itself is a diffusive compound, the above-mentioned transfer is performed based on this diffusivity, and as another example, the formed dye is This includes cases in which the dye is transferred by being dissolved in a solvent that can dissolve the dye or by being heated and dissolved in a hot solvent. Furthermore, a mode in which the formed dye itself is sublimable and the formed dye sublimes and moves to an adjacent layer is also included.

Here, 1. Sublimation property is not only the commonly used property of changing from solid to gas without passing through the liquid state, but also the property of melting a solid to become a liquid, and 4. changing from this liquid to a gas. It also includes properties.

Examples of dye-providing substances that can be used in the present invention include JP-A-57-179840 and JP-A-57-18674.
No. 4, No. 58-116537, No. 58-123533
No. 57-149046, No. 59-12431,
Patent Application No. 57-160698, No. 57-205447, No. 57-224883, No. 57-224884,
No. 57-229671, No. 57-229647, No. 57-225929, No. 58-33363, No. 58
Examples include the dye-donating substances described in Volume 33364, No. 58-34083, and the like.

The dye-providing substance preferably used in the present invention is of a dye-forming type, and those represented by the following general formula (2) are particularly preferred.

General 2) Cp-X In the formula, cp represents a coupler residue excluding the hydrogen atom at the active position, and Cp contains a hydrophilic group such as a sulfo group or a carboxy group and such a hydrophilic group other than the active position. It is a coupler residue that does not have a group.

X represents a group that can be separated from the coupler during the coupling reaction; Preferably, it has a straight chain or branched alkyl group having 8 or more carbon atoms.

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

General formula (IV) General formula (V) General formula (■1) General formula (■) General formula 1) In the above formula, R', R', Rg and R9 are each a hydrogen atom, a -logon atom ( Preferably a chlorine atom, a bromine atom,
iodine atom), an alkyl group (preferably an alkyl group having 1 to 24 carbon atoms, such as methyl, ethyl, butyl, t
Examples include groups such as -octyl, n-dodecyl, n-pentadecyl, and cyclohexyl, but further examples include benzyl and phenethyl groups as alkyl groups substituted with aryl groups, for example, phenyl groups), substituted or unsubstituted aryl group (e.g. phenyl group, naphthyl group, tolyl group, mesityl group), acyl group (e.g. acetyl group, tetradecanoyl group, piparoyl group, substituted or unsubstituted benzoyl group), alkyloxycarbonyl group (e.g. methoxycarbonyl group, benzyloxycarbonyl group), carbonyl group (e.g. phenoxycarbonyl group, p-)lyloxycarbonyl group, α-naphthoxycarbonyl group), alkylsulfonyl group (e.g. methylsulfonyl group) group), arylsulfonyl group (e.g. phenylsulfonyl group), carbamoyl group (
For example, a substituted or unsubstituted alkylcarbamoyl group,
Methylcarbamoyl group, methylcarbamoyl group, tetradecylcarbamoyl group, N-,7'thyl-N-dodecylcarbamoyl group, optionally substituted phenoxyalkylcarbamoyl group, specifically 2,4-di-t-phenoxybutyl -Carbamoyl group, substituted or unsubstituted phenylcarbamoyl group, specifically 2-doacyloxyphenylcarbamoyl group, fat-substituted or unsubstituted acylamino group (e.g. n-glylamido group, laurylamide group, substituted or C-carbamoyl group) Good β-phenoxyethylamide group, phenoxyacetamide group, substituted or unsubstituted benzamide group, methanesulfonamidoethylamide group, β-methoxyethylamide group), alkoxy group (preferably an alkoxy group having 1 to 18 carbon atoms, e.g. λ is a methoxy group, an oxy group, an octadecyloxy group), a sulfamoyl group (e.g., a methylsulfamoyl group, a 11-dodecylsulfamoyl group, a substituted or unsubstituted phenylsulfamoyl group, specifically dodecylphenylsulfamoyl group), a sulfonylamino group (eg, methylsulfonylamino group, tolylsulfonylamino group), or a hydroxyl group. Furthermore, R6 and R7 may combine with each other to form a saturated or unsaturated 5- to 6-membered ring. heptadecyl group), alkoxy group (preferably an alkoxy group having 1 to 18 carbon atoms, e.g. methoxy group, ethoxy group, octadecyloxy group), arylamino group (e.g. anilino group, furthermore, -logon atom, alkyl group, amide group) or anilino group substituted with a substituent such as an imide group), a substituted or unsubstituted alkylamide group (e.g. laurylamide, a phenoxyacetamide or phenoxybutanamide group which may be further substituted), a substituted or unsubstituted alkylamide group (e.g. It represents an arylamide group (for example, a benzamide group, a benzamide group substituted with a -.p gun atom, an alkyl group, an alkoxy group, an amide group, etc.).

Further, Bit, R12 and u15 are a hydrogen atom, a chlorine atom (preferably a chlorine atom, a bromine atom, an iodine atom), an alkyl group (preferably an alkyl group having 1 to 2 primes, e.g., a methyl group, an ethyl group). ), substituted or unsubstituted alkylamido groups (e.g. laurylamide group, optionally substituted phenoxyalkylamide group, e.g. alkyl-substituted phenoxyacetamide group), substituted or unsubstituted arylamide group (e.g. benzoylamide group) represents a group such as

Next, Rlu is an alkyl group, preferably an alkyl group with an envy number of 1 to 8 (for example, λ is a methyl group, a butyl group, an octyl group)
, substituted or unsubstituted aryl group (eg, phenyl group, tolyl group, methoxyphenyl group), etc.

Furthermore, R represents an arylamino group (for example, an anilino group, and an anilino group further substituted with a halogen atom, an alkyl group, an alkoxy group, an alkylamido group, an arylamido group, an imido group, etc.).

Also R16, Rt7, R18, B19, R
20 and R represent the same groups as the groups represented by R and R above.

Typical specific examples of the dye-providing substance represented by general formula (1) include the following compounds.

The following margins [Exemplary dye-donating substances] 1uHz9 NHCCi (Ct2H25 Cf12COO)t The dye-providing substances used in the above invention vary depending on the heat-developable photosensitive composition, coating conditions, processing method, etc., but are generally organic silver salts 1 It is used in a range of 0.01 mol to 10 mol, preferably 0.01 mol to 2.0 mol.

The dye-providing substance used in the present invention is used by being contained in the heat-developable photosensitive layer or other layers. For example, in order to incorporate it into the heat-developable photosensitive layer, U.S. Pat. It can be dissolved and contained in a high boiling point solvent as described in the above issue. Furthermore, in the above-described dispersion method, the dye-providing substance can be dissolved and contained in the heat-developable photosensitive layer by using a low-boiling solvent in combination with the high-boiling solvent, if necessary.

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

The above-mentioned high boiling point solvent is used in the valve to completely dissolve the dye-providing substance, but it is preferably used in the range of 0.05 to 100 parts (parts by weight) per part (parts by weight) of the dye-donating substance. can.

A preferable dispersion method for the above-mentioned dispersion 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. During this dissolution and dispersion, Arimatsu's solvent, which is compatible with water, was added, heated, stirred (homogenizer, ultrasonic dispersion, etc.),
Alternatively, 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.
After partial decomposition and dispersion, the pH can be adjusted as necessary. In this case, an organic or inorganic acid compatible with water can be used as the pH adjuster. The surfactant as a dispersion aid may be an anionic or nonionic surfactant, but anionic surfactants are preferred.

The above Fischer dispersion is also called Agefer dispersion, and is described in British Patent No. 45555 and British Patent No. 4658.
The technical contents described in No. 23, No. 29897, etc. can be referred to.

In addition, examples of the reducing agent used in the present invention include, for example, U.S. Pat.
No. 3,764,328, each specification, and RD12
146, RD15108, RD15127 and JP-A-56-27132, p-phenylenediamine type and p-aminophenol type developing agents, phosphoroamide phenol type and sulfonamide phenol type developing agents, and hydrazone type color development agents. Known color developing agents such as base agents, etc.Known color developing agents such as Chiba or their fricasors are mentioned, but particularly preferred are JP-A No. 5
Publication No. 6-146133 and patent application filed by the applicant in 1973
The p-(N,N-dialkylaminophenyl)sulfamic acid developing agent described in No. 7-225928.

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 silver salt, photosensitive silver salt, and other additives used, but it is usually 0.0 per 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 photosensitive element of the present invention as required. For example, as a development accelerator, U.S. Pat.
No. 31.285, No. 4,012,260, No. 4,
No. 060,420, No. 4,088,496, No. 4
, 207, 392 specifications or RD15733, I
fill 5734, the alkali release agent described in 15776, the organic acid described in Japanese Patent Publication No. 12700/1983, the co-described in U.S. Patent No. 3.667.959,
Non-aqueous polar solvent compound having -802-, -5o- groups, melt former described in U.S. Pat. No. 3,438,776-1 U.S. Pat.
There are polyalkylene dalicols described in No. 19525. In addition, as a color toning agent, for example, JP-A-46-492
No. 8, No. 46-6077, No. 49-5019, No. 4
No. 9-5020, No. 49-91215, No. 49-10
7727 issue, issue 50-2524, giant 150-6713
2 tatami, No. 50-67641, No. 50-114217, No. 52-33722, No. 52-99813, No. 53-1020, No. 53-55115, No. 53-7
No. 6020, No. 53-125014, li+54-1
No. 56523, No. 54-156524, No. 54-15
No. 6525, No. 54-156526, No. 55-406
No. 0, 55-406 x@, IWi 55-3201
No. 5 Wisdom Publication and West German Patent No. 2.140.406-
j! , No. 2.147.063-, No. 2.220.
No. 618, U.S. Patent No. 3.080.254, U.S. Patent No. 3.
No. 847,612, No. 3.782.941, No. 3
．． 994,732, 4,123.282, 4.201.582, etc., such as phthalazinone, phthalicide, pyrazolone,
Quinazolinone, N-hydroxynaphthalimide, benzothiazine, oligophthoxazinedione, 2,3-dihydro-phthalazinedione, 2,3-dihydro-1,3-oxazine-2,4-cymene, oxypyridine, aminopyridine, hydroxy Quinoline, aminoquinoline, isocarbostyryl, sulfonamide, 2H-1,3-benzothiazine-2,4-(3II) dione, benzotriazine, mercaptotriazole, dimercaptotetrazabentalene, phthalic acid, naphthalic acid, phthalamic acid A mixture of one of these with a bite size of 2 or more and an imitazole ratio, a mixture of at least one acid or acid anhydride such as phthalic acid or naphthalic acid, and a phthalazine compound, furthermore, a mixture of phthalazine and maleic acid, Combinations of Ikuko 4λ quinolinic acid, gentisic acid, etc. can be mentioned. Also, Japanese Patent Application No. 57-73215 filed by the present applicant, No. 5
3-amino-5 described in No. 7-76838
-Mercapto-1,2,4-triazoles, 3-acylamino-5-mercap) -1,2,4-) lyazoles are also effective.
For example, Japanese Patent Publication No. 47-11113, Japanese Patent Publication No. 49-901
No. 18, No. 49-10724, No. 49-97613, No. 50-101019, No. F149-130720, No. β150-123331, No. 51-47419,
No. 51-57435, No. 51-78227, No. 51
-104338 meeting, giant 153-19825 ox, times 53-
No. 20923, 1-cho 51-50725, times 5l-32
239f, No. 51-42529, No. 51-81124
No. 54-51821, No. 55-93149, British Patent No. 1.455.271, U.S. Patent No. 3.885.968, U.S. Patent No. 3.70 (1,4
No. 57, No. 4゜137.079, No. 4,138.
No. 265, West German Patent No. 2.617.907, etc.
A mercuric salt, which is a compound described in B@, or an oxidizing agent (e.g., N-halogenoacetamide, N-halogenosuccinimide, perchloric acid and its salts, inorganic peroxide, persulfate, etc.), or acids and their salts (e.g. sulfinic acid, lithium laurate, rosin, diterpene acid, thiosulfonic acid, etc.), or sulfur-containing compounds (e.g. mercapto compound-releasing compounds, thiouracil, disulfide, simple sulfur, mercapto-1,2,4) −)
lyazole, thiazolinthione, polysulfide compounds, etc.), and other compounds such as oxazoline, 1,2,4-triazole, and phthalimide.

In addition, as a stabilizer, a printout preventive agent may be used at the same time, especially after treatment, for example, 4v 48-45228
No. 50-119624, No. 50-1203284
! #, halogenated hydrogen hydrides described in Publication No. 53-46020, specifically tetrabromobutane, tribromoethanol, 2-bromo-2-tolylacetamide,
2-Bromo-2-tolylsulfonylacetamide, 2-
Tribromomethylsulfonylbenzothiazole, 2,4
-bis(tribromomethyl)-6-methyltriazine, etc. □ Maku Tokuko No. 1984-5393, JP-A-50-54329
No., I'i: +50-77034. Post-treatment may be carried out using a trap-containing sulfur compound as described in each publication.Furthermore, U.S. Pat.
No. 6,444, No. 3.824,103, No. 3.8
No. 44,788, and the isothiuronium-based stabilizer precursor described in U.S. Patent No. 3,669.
, No. 670, No. 4,012.260, β1 No. 4,0
60,420 and the like may be contained.

In addition to the above ingredients, various additives such as spectral sensitizers, antihalation dyes, fluorescent whitening agents, hardeners, antistatic agents, plasticizers, spreading agents, coating aids, etc. are added as necessary. be done.

The binder used in the present invention may be either a hydrophilic binder or a hydrophobic binder, but a hydrophilic binder is particularly preferable, and some hydrophobic binders may also be used in combination. .

A hydrophilic binder is one 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 and gelatin derivatives,
Natural substances such as cellulose derivatives, polysaccharides such as dextran, gum arabic, etc. and useful polymers include polyvinyl acetals (preferably with a degree of acetalization below 209, e.g. polyvinyl butyral).
, polyacrylamide, polyvinylpyrrolidone, ethylcellulose, polyvinyl alcohol (saponification rate is 75%)
The above are preferred), but are not limited to these. If necessary, two or more types may be used in combination. The amount of the inder is 1/10 part to 10 parts, preferably 1/4 part to 4 parts by weight per 1 part of the organic silver salt in each photosensitive layer.

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, vinyl acetal film, polyethylene film,
Examples include plastic films such as polyethylene terephthalate film and polycarbonate film, and metals such as glass, paper, and aluminum. Baryta paper, resin coated paper, and water-resistant paper can also be used.

In the heat-developable color photosensitive element of the present invention, dyes are formed or released in an imagewise manner by thermal development, and these dyes are transferred to the image-receiving element by thermal diffusion transfer to form an image. It is not necessary to use a particularly processed image receiving element, and paper, cloth, wood, glass, plastic, metal, etc. can be used. Particularly preferred is an image receiving element made of cellulose such as paper or cloth. Note that this does not preclude the use of the above-mentioned specially processed image-receiving sheet.

Various exposure means can be used in the photosensitive elements of the present invention. The latent image is obtained by imagewise exposure to radiation, including visible light. Generally, a light source used for normal color printing, such as a tungsten lamp, mercury lamp, xenon lamp, laser beam, CRT+LED beam, etc., can be used as the light source.

The original drawing may be a line image such as a technical drawing or a photographic image with gradation. Furthermore, the printing from the original drawing may be done by contact printing.

The image projected by a fc video camera or the like or the image information sent from a television station is sent directly to a CRT or OFT, and this image is formed on a heat-developable photosensitive element using a contact lens or a lens and is printed. I can feel it.

Furthermore, LEDs (light emitting diodes), which have recently seen great progress, are being used as exposure means and display means in various devices. It is difficult to make an LED that effectively emits blue light. In this case, to reproduce a color image, the LEDs should be designed to emit green, red, and infrared light, and the layers sensitive to these lights should provide yellow, magenta, and cyan pigments, respectively. Bye. That is, the green light-sensitive layer may contain a yellow dye-providing compound, the red light-sensitive layer may contain a magenta dye-providing compound, and the infrared light-sensitive layer may contain a cyan dye-providing compound.

In addition to the above method of directly closely projecting or projecting the original image, the original image illuminated by a light source can be read by a light receiving element such as a phototube or CCD, or stored in the memory of a computer, etc.
After performing so-called image processing to process this information as necessary, this image information is reproduced on a CRT and used as an image-like light source.Based on the processed information, three types of LID can be directly generated. There is also a method of emitting light for exposure.

Thermal transfer from the photosensitive element of the present invention to the image receiving element is performed when the photosensitive element of the present invention is thermally developed or reheated after thermal development. For heating for thermal transfer, all methods applicable to ordinary heat-developable photosensitive materials can be used. For example, by contacting a heated block or plate, by contacting a heated roller with a medium-heated drum, by passing through a high-temperature atmosphere, or by using high-frequency heating, and by using the photosensitive material of the present invention. It is also possible to provide a conductive layer in the element and take advantage of the Joule heat generated by passing current or a strong magnetic field. There are no particular restrictions on the heating pattern, including preheating and then reheating, heating at a high temperature for a short time, or at a low temperature for a long time.
Although continuous rising, falling, repeated heating, or even discontinuous heating is possible, a simple pattern is preferred. Alternatively, a method in which exposure and heating proceed simultaneously may be used.

Usually, the heating temperature during transfer is 80°C to 200°C, preferably 80°C to 180°C, and the heating time is usually 1 second to .
5 minutes, preferably in the range of 5 seconds to 3 minutes.

For thermal transfer using the photosensitive element of the present invention, a commercially available thermal developing machine can be easily used. For example, "Image Forming Model 4634" (Sony Tektronix), "Tibero Tuber Module 277" (3M), "Video Hard Copy Unit WZ-301" (Japan Radio), etc. can be easily applied.

〔Example〕

Examples of the present invention are shown below, but the embodiments of the present invention are not limited to these.

<Preparation of 4-sulfobenzotriazole silver salt> 20 g
(7) Add 3-sulfobenzotriazole and 4 g of sodium hydroxide to a 300-mL mixture of ethanol and water (1:1).
It was added to and dissolved. 5N silver nitrate solution 20-
was dripped. At this time, a 5N sodium hydroxide solution was also added dropwise at the same time to maintain the pH at 7-8. This solution was stirred at room temperature for 1 hour, and then made up to 400% with water to prepare a 4-sulfobenzotriazole silver solution.

Example 1 Exemplary dye-providing substance (1) 520"f was dissolved in a mixed solution of 520wg of dioctyl phthalate and 1.6" of ethyl acetate. This solution was mixed with 5.5" containing a surfactant and an aqueous gelatin solution (6"). After mixing and adding water to make a total volume of 12 m, the mixture was dispersed with a homogenizer to obtain a dispersion of the dye-providing substance.

The above 4-sulfobenzotriazole silver solution 4-1 was mixed with 6.5 cm of the dye-donor dispersion, and further 730 cm of polyvinylpyrrolidone (molecular weight 30,000), 520 cm of pentaerythritol, 310 cm of polyethylene glycol (molecular weight 400), Water 3- and the following developer 200
After adding ①, the pH was adjusted to 5.5 with citric acid from Step 3.

To this dispersion, 3×4 10 moles of silver iodobromide with an average particle size of 0.05 μm in terms of silver was added, and the mixture was coated on a polyethylene terephthalate base with a wire bar to a wet thickness of 65 μm, and then exposed to light. A layer was applied.

Developer: Next, 3 g of carnauba wax was dissolved in 30% of ethyl acetate.
A heat-fusible layer was formed by coating the above photosensitive layer with a wire bar to a wet film thickness of 70 μm.

32. After drying the resulting photosensitive element. OOOCMS (cantera meter φ seconds) white exposure was applied through a step wedge.

Next, baryta paper, white paper for a dry copying machine (U-Blx, manufactured by Konishiroku Photo Industry Co., Ltd.), or image receiving paper with vinyl chloride coated on baryta paper was placed on the coated surface of the exposed sample, and the surface temperature was 140°C. 6 with metal heat block
Pressure heating was performed for 0 seconds, and then the image-receiving paper was peeled off, and the density of the dye image transferred to each image-receiving paper was measured. Furthermore, multiple images were obtained by the same operation using image receiving paper in which vinyl chloride was coated on baryta paper. The results are shown in Table-1.

Example 2 On the photosensitive layer of Example 1, 3 g of dimethyl urea and 3 g of polyvinyl butyral were dissolved in 30 g of methanol and coated with a wire bar to a wet film thickness of 70 μm to form a heat-fusible layer. .

After drying the obtained photosensitive element, it was exposed in the same manner as in Example-1, and thermally developed using the same image-receiving paper as in Example-1 to obtain a transferred image. The results are shown in Table-1.

Example-3 The same sample as in Example-1 was prepared, except that 850 ■ was used as the dye-donor substance (4) in place of the dye-donor substance (1) in Example-1, and the same sample as in Example-1 was prepared. The same exposure and heat development were performed. The results are shown in Table-1.

Comparative Examples 1 and 2 Samples obtained by removing the thermofusible layer from the photosensitive elements of Examples 1 and 3 were subjected to the same exposure and exposure as in Example 1, respectively.
Heat development was performed. The results are shown in Table-1.

Example-4 6 ml of the dye dispersion of Example-1 and the sulfobenzotriazole silver solution 4- were mixed, and further 450 μ of polyvinylpyrrolidone (molecular weight 30.000), 3751 ng of pentaerythritol, and polyethylene glycol (molecular weight 40) were mixed.
After adding 225 ml of water and 200 ml of the above developer, the pH was adjusted to 5.5 with citric acid. Silver iodobromide having an average particle diameter of 0.125 μm and red sensitivity was added to this dispersion in an amount of 3×10 mol in terms of silver, and the mixture was coated onto a polyethylene terephthalate base using a wire bar to a wet film thickness of 65 μm. A first photosensitive layer was applied.

Then add 4 ml of sulfobenzotriazole silver solution and 25%
3m7 of gelatin solution! and then polyvinylpyrrolidone 450Ilv1 pentaerythritol 375T
ng of polyethylene glycol and 225 μm of polyethylene glycol were added thereto, and water was added to make a total volume of 13 ml. This solution is applied to the first photosensitive layer.
was applied on top to form an intermediate layer.

Next, the dye-donating substance of the first photosensitive layer is changed to dye-donating substance (4).
In addition, silver halide has an average grain size of 0.12 with green sensitivity.
A second photosensitive layer having the same composition as the first photosensitive layer was coated, except that 5 μm of silver iodobromide was used instead.

Furthermore, a heat-fusible layer having the same components as in Example 1 was applied to obtain a multilayered photosensitive element. This sample was exposed to white light, red light, and green light at 1600 cMS through a step wedge, and then superimposed on baryta paper and image receiving paper coated with vinyl chloride on baryta paper at 140°C.
After developing for 1 minute, the image receiving paper was peeled off to obtain a transferred image on each image receiving paper. Table 2 shows the density of the obtained image.

Table-1 Table-2 Person: Baryta paper B: As shown in the practical history of coating vinyl chloride on baryta paper, when a heat-fusible layer is provided on the photographic constituent layer, the transfer of dye to plain paper is difficult. Improved sex,
Even if plain paper is used as the image receiving paper, a transfer image with sufficient degree of illumination can be obtained. Furthermore, since the adhesion to the image-receiving paper and the releasability after development are improved, there is also the effect of increasing the transfer density and reducing transfer unevenness on the surface-treated image-receiving paper.

Claims (1)

[Claims] A heat-developable color photosensitive material having, on a support, a photographic constituent layer containing at least a photosensitive silver halide, an organic silver salt, a reducing agent, a dye-providing substance capable of releasing or forming a heat-developable diffusible dye, and a binder. 1. A heat-developable color photosensitive material characterized in that the outer layer of the photographic constituent layer is a heat-fusible layer containing a heat-fusible substance.