JPS62138852A - Transfer type heat developable color photosensitive material - Google Patents

Abstract

PURPOSE:To obtain the titled material having a less film breakage by incorporating a polymer having a sulfonic acid group in the side chain to a non- photosensitive protective layer lying in an opposite side surface against the 1st substrate of the heat developable photosensitive layer which is the most far from the 1st substrate body of the heat developable photosensitive element, and by incorporating a heat-meltable solvent to the image receiving element. CONSTITUTION:The non-photosensitive protective layer is provided with the opposite side surface against the 1st substrate of the heat developable photosensitive layer which is the most far from the 1st substrate body of the heat developable sensitive element. Said non-photosensitive protective layer contains the polymer having the sulfonic acid group in the side chain. The used polymer contg. the sulfonic acid group is not specified, if said polymer is an olefinic compd. having at least one of the sulfonic acid group. The concrete example of the used heat-meltable solvent is preferably C(Cl)3CONH2, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a transfer-type heat-developable color photosensitive material, and more particularly to a transfer-type heat-developable color photosensitive material with improved film breakage and less uneven dye transfer.

[Background of the Invention] In recent years, heat-developable photosensitive materials whose development process can be performed by heat treatment have attracted attention as photosensitive materials.

Regarding such heat-developable photosensitive materials, for example,
No. 4921 and No. 43-4924 disclose a photosensitive material comprising an organic silver salt, silver halide, a reducing agent, and a binder, which is commercialized as dry silver by 3M Company.

Attempts have been made to improve such heat-developable photosensitive materials and obtain color images by various methods.

For example, U.S. Patent Nos. 3.531,286 and 3.7.
No. 61.270 and No. 3,764,328, etc. describe a method of forming a dye image by the reaction of an oxidized product of an aromatic primary amine developing agent with a coupler, and Research D 1sc.
Losure ) 15108 and 15127, U.S. Pat. A method of forming a dye image by reaction, as disclosed in British Patent No. 1.590.956, uses an organic imino silver salt having a dye part, liberates the dye in a heat development part, and forms the image on a separately provided image-receiving layer. JP-A-52-105821, JP-A-52-105821, 5
2-105822, No. 56-50328, U.S. Pat. No. 4,235,957, etc., methods for obtaining positive dye images by silver dye bleaching methods, and U.S. Pat.
．． Utilizing the leuco dyes disclosed in No. 180.731, No. 3,985,565, No. 4,022,617, No. 4,452,883, and JP-A-59-206831, etc. Various methods have been proposed, including methods for obtaining dye images.

However, these proposals regarding the heat-developable color light-sensitive materials have the disadvantages that it is difficult to bleach-fix the black, white, and silver images that are formed at the same time, that it is difficult to obtain clear color images, and that it is difficult to obtain clear color images. Since these methods require post-processing, they are still unsatisfactory for practical use.

In recent years, as a new type of color image forming method using heat development, Japanese Patent Application Laid-open Nos. 57-179840 and 57-186 have been developed.
No. 744, No. 57-198458, No. 57-2072
No. 50, etc., disclosed a method of obtaining a color image by transferring a diffusible dye released by thermal development.

These methods were further improved to produce diffusible dyes by oxidizing non-diffusible reducing dye-donating substances, such as those disclosed in Japanese Patent Application Laid-open Nos. 58-58543 and 59-168439. A method for releasing , JP-A-58-
No. 79247, No. 59-174834, No. 59-12
No. 431, No. 59-159159, No. 60-2950
JP-A-58-149046, JP-A No. 58-149047, JP-A No. 59-124339, JP-A-Sho 58-149046, JP-A No. 58-149047, JP-A No. 59-124339; No. 59-181345, No. 60-2950, Japanese Patent Application No. 181604/1983,
59-182506, 59-012507, 59-272335, etc., which use a non-diffusible compound that reacts with an oxidized developing agent to form a diffusible dye; , Japanese Patent Publication No. 59-15
No. 2440, 59-124327%, 59-154
No. 445, No. 59-166954, etc., are non-diffusible reducing dye-donating substances that lose their ability to release diffusible dyes when oxidized, and conversely non-diffusible reducing dyes that release diffusible dyes when reduced. a method containing a color-providing substance;
etc. have been proposed.

However, conventionally, in photosensitive materials in which images are formed by this type of dry heat processing method, photosensitive elements contain photosensitive silver halide, dye-providing substances, reducing agents, and in some cases, organic silver salts, thermal solvents, and other substances. contains active compounds, and the physical properties of the membrane are not necessarily good.
Film destruction during heat treatment often causes problems such as crack-like defects in the photosensitive layer and a portion of the photosensitive layer transfers to the surface of the image receiving element, so there is a demand for heat-developable photosensitive materials with good film properties. was. As a result of extensive research, the present inventors have found that by incorporating a polymer having a sulfonic acid group in the side chain into at least one of the non-photosensitive protective layers of the photosensitive element, these defects occurring during heat treatment can be significantly reduced. However, this layer containing a polymer having a sulfonic acid group in its side chain has a new drawback in that it has poor adhesion to the image receiving element during heat treatment and tends to cause uneven transfer density. became clear.

In order to solve this problem, we conducted further studies and found that at least one of the non-photosensitive protective layers of the photosensitive element contains a polymer having a sulfonic acid group in its side chain and a mobile dye. By using a combination of two materials containing a hot solvent in the image-receiving element for fixation, film destruction of the photosensitive layer is improved, and the adhesion between the photosensitive element and the image-receiving element is improved, which improves transfer. The inventors have discovered that it is possible to obtain a heat-developable photosensitive material that is free from density unevenness and has a stable and high maximum density, leading to the present invention.

[Object of the Invention] Therefore, the first object of the present invention is to provide a transfer-type heat-developable color photosensitive material that is free from film destruction and has improved physical properties.

A second object of the present invention is to provide a transfer-type heat-developable color photosensitive material that has a uniform image with no dye transfer unevenness.

[Structure of the Invention] The above object of the present invention is to provide at least one
A heat-developable photosensitive element having a photographic constituent layer consisting of a heat-developable photosensitive layer and at least one non-photosensitive layer; and an image-receiving element having at least one image-receiving layer on a second support. In the transfer type heat-developable color photosensitive material, at least one non-photosensitive protective layer is provided on the side opposite to the first support of the heat-developable photosensitive layer furthest from the first support of the heat-developable photosensitive element. and at least one layer of the non-photosensitive protective layer contains a polymer having a sulfonic acid group in a side chain,
Moreover, the image receiving element is a transfer type heat-developable color photosensitive material containing a thermal solvent.

[Specific Structure of the Invention] The transfer type heat-developable color photosensitive material of the present invention consists of a heat-developable photosensitive element and an image-receiving element. The element is called an image receiving member.

The heat-developable color photosensitive material according to the present invention has at least one non-photosensitive protective layer on the side opposite to the heat-developable (g!) photosensitive residential support furthest from the support, and the non-photosensitive layer [ At least one layer of i contains a polymer having a sulfonic acid group in a side chain. For example, when the non-photosensitive protective layer has two or more layers, at least the outermost layer, that is, the non-photosensitive layer furthest from the support. In view of the effects of the present invention, it is particularly preferable for the protective layer to contain a polymer having a sulfonic acid group in its side chain.

The monomer having a sulfonic acid group constituting the polymer having a sulfonic acid group in the side chain used in the present invention includes:
Any olefinic compound having at least one sulfone M group can be used, but compounds represented by the following general formula [I] are preferred.

In the present invention, the sulfonic acid group is simply 180a H
as well as its salts (e.g. sodium salts, potassium salts,
Ammonium salts, etc.) are also included.

General formula [I] In the formula, R+, R2, R3 and R4 are each a hydrogen atom, a halogen atom (for example, a chlorine atom, a bromine atom, etc.),
Sulfonic acid groups, alkyl groups (e.g. methyl, ethyl, propyl, isobutyl, etc.) and aryl groups (
For example, phenyl group, naphthyl group, etc.). The alkyl group includes those having a substituent, such as a halogen atom, a sulfone atom, etc. Examples include lW, an alkoxy group, an aryl group, an acyl group, a cyano group, and an amino group. Further, the aryl group includes those having a substituent, and examples of the substituent include a halogen atom, a sulfone MElu, an alkyl group, and an alkoxy group.

However, at least one of R1, R2, R3 and R+
One is a sulfonic acid group, or an alkyl group or aryl group having sulfone M1 as a substituent. The alkyl group or aryl group having the sulfone R group may have two or more sulfonic acid groups, and may also have a substituent other than the sulfonic acid group.

The polymer having a side chain sulfonic acid group according to the present invention may be a so-called homopolymer of repeating units consisting only of the monomer having the sulfonic acid group, or a copolymer which is a combination of two or more of the monomers having the sulfonic acid group. 1fJ! of a comonomer having another copolymerizable ethylenically unsaturated group. A copolymer consisting of the above may also be used.

Examples of the comonomer having an ethylenically unsaturated group that can form a copolymer with the monomer having the sulfone [4] include acrylic esters, methacrylic esters, vinyl esters, olefins, styrenes, crotonic acids, Stelles, itaconic acid diesters,
1 selected from maleic acid diesters, fumaric acid diesters, acrylamides, allyl compounds, vinyl ethers, vinyl ketones, vinyl heterocyclic compounds, glycidyl esters, unsaturated nitriles, polyfunctional monomers, and various unsaturated acids Mention may be made of monomer compounds of one species or a combination of two or more species.

More specifically, these seven-mer compounds are as follows:
Examples of acrylic esters include methyl acrylate,
Ethyl acrylate, n-propyl acrylate, isopropyl acrylate, lobetyl acrylate, isobutyl acrylate, 5ec-butyl acrylate, t
ert-butyl acrylate, amyl acrylate, hexyl acrylate, 2-ethylhexyl acrylate, octyl acrylate, tert-octyl acrylate, 2-chloroethyl acrylate, 2-bromoethyl acrylate, 4-chlorobutyl acrylate, cyanethyl acrylate, 2- Acetoxyethyl acrylate, dimethylaminoethyl acrylate, benzyl acrylate, methoxybenzyl acrylate, 2-chlorocyclohexyl acrylate, cyclohexyl acrylate, furfuryl acrylate, tetrahydrofurfuryl acrylate, phenyl acrylate, 2-hydroxyethyl acrylate, 5-hydroxypentyl Acrylate, 2,2-dimethyl-3-hydroxypropyl acrylate, 2-methoxyethyl acrylate, 3-
Methoxybutyl acrylate, 2-ethoxyethyl acrylate, 2-iso-propoxy acrylate, 2-
Butoxyethyl acrylate, 2-(2-methoxyethoxy)ethyl acrylate, 2-(2-butoxyethoxy)ethyl acrylate, ω-methoxypolyethylene glycol acrylate (number of moles added n = 9), 1-bromo-2-methoxyethyl acrylate , 1.1-dichloro-2-ethoxyethyl acrylate and the like.

Examples of methacrylic acid esters include methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, inpropyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, 5ec-butyl methacrylate, tert-butyl methacrylate,
amyl methacrylate, hexyl methacrylate, cyclohexyl methacrylate, benzyl methacrylate,
Chlorobenzyl methacrylate, octyl methacrylate, sulfopropyl methacrylate, N-ethyl-N-
Phenylaminoethyl methacrylate, 2-(3-phenylpropyloxy)ethyl methacrylate, dimethylaminophenoxyethyl methacrylate, furfuryl methacrylate, tetrahydrofurfuryl methacrylate, phenyl methacrylate, talesyl methacrylate,
Naphthyl methacrylate, 2-hydroxyethyl methacrylate, 4-hydroxyethyl acrylate, triethylene glycol monomethacrylate, dipropylene glycol monomethacrylate, 2-methoxyethyl methacrylate, 3-methoxybutyl methacrylate, 2-
Acetoxyethyl methacrylate, 2-acetoacetoxyethyl methacrylate, 2-ethoxyethyl methacrylate, 2-iso-propoxyethyl methacrylate, 2-butoxyethyl methacrylate, 2-(2-methoxyethoxy)ethyl methacrylate, 2-(2-ethoxyethoxy) Ethyl methacrylate, 2-(2-butoxyethoxy)ethyl methacrylate, ω-methoxypolyethylene glycol methacrylate (number of added moles n =
6), allyl methacrylate, methacrylic acid dimethylaminoethyl methyl chloride salt, and the like.

Examples of vinyl esters include vinyl acetate, vinyl propionate, vinyl butyrate, vinyl isobutyrate, vinyl caproate, vinyl chloroacetate, vinyl methoxy acetate, vinyl phenylacetate, vinyl benzoate, vinyl salicylate, etc. It will be done.

Examples of olefins include dicyclopentadiene, ethylene, propylene, 1-butene, 1-pentene,
Examples include vinyl chloride, vinylidene chloride, isoprene, chlorobrene, butadiene, 2,3-dimethylbutadiene, and the like.

Examples of styrenes include styrene, methylstyrene, dimethylstyrene, trimethylstyrene, ethylstyrene, isopropylstyrene, chloromethylstyrene, methoxystyrene, acetoxystyrene, chlorstyrene, dichlorostyrene, bromstyrene, and trifluoromethylstyrene. , vinylbenzoic acid methyl ester, and the like.

Examples of crotonate esters include butyl crotonate, hexyl crotonate, and the like.

Examples of itaconic diesters include dimethyl itaconate, diethyl itaconate, and dibutyl itaconate.

Examples of maleic acid diesters include diethyl maleate, dimethyl maleate, dibutyl maleate, and the like.

Examples of the fumaric acid diesters include diethyl fumarate, dimethyl fumarate, and dibutyl fumarate.

Acrylamides include acrylamide, methylacrylamide, ethylacrylamide, propylacrylamide, butylacrylamide, tert-butylacrylamide, cyclohexylacrylamide, benzylacrylamide, hydroxymethylacrylamide,
Methoxyethyl acrylamide, dimethylaminoethyl acrylamide, phenylacrylamide, dimethylacrylamide, diethylacrylamide, β-cyanoethyl acrylamide, N-(2-acetoacetoxyethyl)acrylamide, diacetone acrylamide, etc.; Methacrylamides, e.g. methacrylamide, methylmethacrylamide amide, ethyl methacrylamide, propyl methacrylamide, butyl methacrylamide, ter
t-butylmethacrylamide, cyclohexylmethacrylamide, benzylmethacrylamide, hydroxymethylmethacrylamide, methoxyethylmethacrylamide, dimethylaminoethylmethacrylamide, phenylmethacrylamide, dimethylmethacrylamide, diethylmethacrylamide, β-cyanoethylmethacrylamide, N-(2-acetoacetoxyethyl) methacrylamide, etc. Allyl compounds, such as allyl acetate, allyl cabroate, allyl laurate, allyl benzoate, etc. Vinyl ethers, such as methyl vinyl ether, butyl vinyl ether, hexyl vinyl ether, methoxyethyl Vinyl ether, dimethylamino alvinyl ether, etc.; Nyl ketones, such as methyl vinyl ketone, phenyl vinyl ketone, methoxyethyl vinyl ketone, etc.; Vinyl heterocyclic compounds, such as vinyl pyridine, N-vinylimidazole, N-vinyloxazolidone, N -Vinyltriazole, N-vinylpyrrolidone, N-propylmaleimide, N~ruvinylsuccinimide, etc.; Glycidyl esters, such as glycidyl acrylate, glycidyl methacrylate, etc.; Unsaturated nitriles, such as acrylonitrile, methacrylateril, etc.: Polyfunctional monomers such as divinylbenzene, methylene bisacrylamide, ethylene glycol dimethacrylate, etc.

Furthermore, acrylic acid, methacrylic acid, itaconic acid, maleic acid, monoalkyl itaconates such as monomethyl itaconate, monoethyl itaconate, mozupdel itaconate, etc.; monoalkyl maleates such as monomethyl maleate, monoethyl maleate, maleic acid, etc. Acids such as motupdel, ditraconic acid, styrene sulfonic acid, vinylbenzyl sulfonic acid, vinyl sulfonic acid, acryloyloxyalkyl sulfonic acid, such as acryloyl.

Oxymethylsulfonic acid, acryloyloxyethylsulfonic acid, acryloyloxypropylsulfonic acid, etc.: Methacryloyloxyalkylsulfonic acid, e.g.
Niacrylamidoalkylsulfonic acids such as methacryloyloxymethylsulfonic acid, methacryloyloxyethylsulfonic acid, methacryloyloxypropylsulfonic acid, such as 2-acrylamido-2-methylethanesulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid, 2-acrylamido-2-methylbutanesulfonic acid, etc.; methacrylamide alkyl sulfonic acids, such as 2-methacrylamido-2-methylethanesulfonic acid, 2-methacrylamido-2-methylpropanesulfonic acid, 2-methacrylamido-2 - niacryloxyalkyl phosphates such as methylbutanesulfonic acid, e.g. acryloyloxyethyl phosphate, 3
- Acryloyloxypropyl-2-phosphate, etc.: Methacryloyloxyalkyl phosphate, such as methacryloyloxyethyl phosphate, 3-methacryloyloxypropyl-2-phosphate, etc.; 3-aryloxy-2-hydroxypropanesulfonic acid having two hydrophilic groups Examples include sodium. These acids may be salts of alkali metals (eg, Na, etc.) or ammonium ions. Other monomer compounds include U.S. Patent No. 3,459,790
@, No. 3.438.708, No. 3,554,98
No. 7, No. 4,215,195, No. 4,247,6
It is possible to use the crosslinking materials described in No. 73, JP-A No. 57-205735, and the like. Examples of such crosslinking monomers include N-
(2-acetoacetoxyethyl)acrylamide, N
-(2-(2-acetoacetoxyethoxy)ethyl)acrylamide and the like can be mentioned.

Next, specific examples of polymers having sulfone li in the side chain used in the present invention will be given, but the invention is not limited thereto. (The numbers outside the parentheses indicate the reaction molar ratio of the monomers.) Below the margin (3) CH3
(6) CH3 (force
CH3803K CON
H25O3Na α: J C
H30yu CH3 α→ H3 Q CH3 薯(19) CH3 (a) CH3 5O3K 1-LJLJ and 4Mg (a) H3 (c) CH3 COOC4H95OaK COOC4H9.

In addition, when a copolymer is formed with the monomer having the sulfonic acid group and the copolymers, it is preferable that the repeating unit consisting of the sulfonic acid group-containing heptamer is present in a small proportion of 20 to 20% of the total polymer. This is the case where the content is 100% by weight, more preferably 30 to 100fflf
This is the case where fi% is included.

The polymer having a sulfonic acid group in a side chain according to the present invention can be polymerized by an emulsion polymerization method or a solution polymerization method. Emulsion polymerization methods are described in U.S. Pat. 451,820 can be used.

These methods can also be applied to the formation of homopolymers and copolymers; in the latter case the comonomer may be a liquid comonomer, which in the case of emulsion polymerization normally also acts as a solvent for the immobilized monomer. .

Examples of emulsifiers used in the emulsion polymerization method include surfactants, polymeric protective colloids, and copolymer emulsifiers. Surfactants include anionic surfactants, nonionic surfactants, cationic surfactants, and amphoteric surfactants known in the art.

Examples of anionic activators include soaps, sodium dodecylbenzenesulfonate, sodium lauryl sulfate,
Examples include sodium dioctyl sulfosuccinate and sulfates of nonionic surfactants.

Examples of nonionic surfactants include polyoxyethylene nonylphenyl ether, polyoxyethylene stearate, polyoxyethylene sorbitan monolaurate, polyoxyethylene-polyoxybrobylene block copolymer, and the like. Examples of cationic activators include alkylpyridium salts and tertiary amines.

Furthermore, examples of amphoteric surfactants include dimethylalkylbetaines, alkylglycines, and the like. Examples of the polymeric protective colloid include polyvinyl alcohol and hydroxyethyl cellulose. These protective colloids may be used alone as emulsifiers or in combination with other surfactants. For information on the types of these activators and their effects, please refer to the Bergische Chemie Industrie x (B e1gischll!
Chenlische Industry), 2
8.16-20 (1963).

In order to disperse a lipophilic polymer synthesized by a solution polymerization method in the form of a latex in an aqueous gelatin solution, the lipophilic polymer is first dissolved in an organic solvent, and then dissolved in an aqueous gelatin solution with the help of a dispersant. Then, it is dispersed into a latex form using ultrasonic waves, a colloid mill, etc. A method for dispersing lipophilic polymers in latex form in aqueous gelatin solutions is described in US Pat. No. 3,451,820.

Examples of organic solvents that dissolve lipophilic polymers include esters such as methyl acetate, ethyl acetate, propyl acetate, etc.
Alcohols, ketones, halogenated hydrocarbons, ethers, etc. can be used.

Further, these specific solvents can be used alone or in combination of two or more.

In producing the polymer having a sulfonic acid group in the side chain according to the present invention, the solvent used for polymerization is a good solvent for the monomer and the resulting polymer having a sulfonic acid group in the side chain, and is a good solvent for the polymer having a sulfonic acid group in the side chain. One with low reactivity is desirable. Specifically, water, toluene, alcohol (e.g. methanol, ethanol, 1so-propanol, tert
-butanol, etc.), acetone, methyl ethyl ketone, tetrahydrofuran, dioxane, ethyl acetate, dimethyl formamide, dimethyl sulfoxide, acetonitrile, methylene chloride, etc. These solvents may be used alone or in combination of two or more. good.

Although it is necessary to consider the type of polymerization initiator, the type of solvent used, etc., the polymerization temperature is usually in the range of 30°C to 120°C.

Examples of the polymerization initiator used in the emulsion polymerization method and solution m method for polymers having sulfonic acid groups in the side chains of the present invention include those shown below.

Examples of water-soluble polymerization initiators include persulfates such as potassium persulfate, ammonium persulfate, and sodium persulfate;
Sodium 4,4'-azobis-4-cyanovalerate, 2
, 2'-azobis(2-amidinopropane)jW salts and other water-soluble azo compounds, and hydrogen peroxide can be used.

In addition, examples of the lipophilic polymerization initiator used in the solution polymerization method include azobisisobutyronitrile, 2,2'-azobis-(2,4-dimethylvaleronitrile), 2.2'-azobis-(2,4-dimethylvaleronitrile),
'-azobis(4-methoxy-2,4-dimethylvaleronitrile>, i, 1'-azobis(cyclohexanone-1-carbonitrile), 2,2'-azobisisocyanoacetic acid, 2,2'- Dimethyl azobisisobutyrate, 1.
Azo compounds such as 1'-azobis(cyclohexanone-1-carbonitrile), 4,4'-azobis-4-cyanovaleric acid, benzoyl peroxide, lauryl peroxide, chlorobenzyl peroxide, diisobrobyl baroxydicarbonate , di[-butyl peroxide, and other peroxides. Among these, preferred are benzoyl peroxide,
Examples include chlorobenzyl peroxide and lauryl peroxide.

These polymerization initiators can be contained in an amount of 0.01 to 10% by weight, preferably 0.1 to 5% by weight, based on the total amount of monomers in emulsion polymerization and solution polymerization.

Furthermore, polymerization methods other than the combination method described above, such as suspension polymerization and bulk polymerization, can also be applied. That is,
In the present invention, a homopolymer of the monomer having a sulfonic acid group of the present invention, a copolymer obtained by combining two or more of the monomers, or a copolymer consisting of the monomer and at least one other polymerizable comonomer is used as a copolymerization component. It includes all copolymers and is not limited by their synthesis process.

The molecular color of the polymer of the present invention is preferably 1,500
~1,000,000, more preferably s, ooo
~500,000.

Next, an example of the synthesis of a polymer having a sulfonic acid group in a side chain according to the present invention will be given.

Synthesis example (exemplified compound-1) C)-12=C)-ISO3K 48.3g (0,3
3 moles), 2 g of 2.2-azobisisobutyronitrile, and 3 g of dimethylformamide were placed in a flask, and the mixture was refluxed for 10 hours. Thereafter, the reaction solution was poured into a large amount of water with vigorous stirring to precipitate the reaction product. Next, the precipitate was filtered and dried to obtain a copolymer according to the present invention, exemplified compound-(1). The yield was 91.31J (yield 91.3%). N.M.
By R1 elemental analysis and the like, W1 confirmed that this substance had the composition of Compound Example-(1).

Other compounds can also be synthesized in the same manner based on the above synthesis method.

The polymer used in the present invention may be used alone or two
More than one species may be used in combination.

The amount of polymer a used in the present invention is 0.01 g to 50, preferably 0, osg to 10 osg, based on the support 112.
Can be used. In addition, the dry weight ratio of the hydrophilic colloid used as a binder is 0.05.
-2.0, preferably 0.1-0.5.

Examples of the heat solvent used in the receiving element of the present invention, that is, the image receiving member, include U.S. Pat.
-No, 17643 (X I[), special nHa 5
Examples include polar organic compounds such as those described in Japanese Patent Application No. 9-229556 and Japanese Patent Application No. 59-47787.

Specific examples of hot solvents preferably used in the present invention include:
Urea derivatives (e.g., dimethylurea, diethylurea, phenylurea, etc.), amide derivatives (e.g., -, acetamide, benzamide, etc.), polyhydric alcohols (e.g., 1.5-bentanediol, 1.6-bentanediol, 1 .2-cyclohexanediol, pentaerythritol, trimethylolethane, etc.) or polyethylene glycols, and these can be used alone or in combination of two or more.

Methods for adding a hot solvent to an image-receiving member differ depending on whether the hot solvent and the image-receiving layer coating are hydrophilic or oleophilic. Methods used in the art include methods of adding by dissolving in a mixed solution of organic solvents, etc., methods of adding by dissolving or dispersing in a hydrophilic binder or hydrophobic binder, or a binder using two or more of these in combination as necessary. It can be incorporated into the coating liquid by various addition methods.

The amount used is 5% to 500% by weight, preferably 10% to 300% by weight of the binder amount.

Among the thermal solvents contained in the image receiving member of the present invention, water-insoluble solid thermal solvents described below are more preferable.

A water-insoluble solid thermal solvent is a compound that is solid at room temperature but becomes liquid at high temperatures (60°C or higher, preferably 100°C or higher, particularly preferably 125°C or higher and 250°C or lower), and is an inorganic/organic compound. ("Organic Conceptual Diagram" by Yoshio Koda, Sankyo Publishing, 1984) is in the range of 0.5 to 3.0, preferably 0.7 to 2.5, particularly preferably 1.0 to 2.0. A compound whose solubility in water at room temperature is less than 1.

Specific examples of the water-insoluble solid heat solvent used in the present invention are shown below, but the invention is not limited thereto.

Below F margin examples Water-insoluble solid heat solvent C(C2)3 C0NH2141° 1.44168
゜Many of the compounds used as the above-mentioned water-insoluble solid thermal solvents are commercially available, and those skilled in the art will be able to tell you how to add them after grinding and dispersing them using a ball mill, sand mill, etc., how to add them after dissolving them in an appropriate solvent, and how to add them after dissolving them in a suitable solvent. There are methods such as dissolving it in a solvent and adding it as an oil-in-water dispersion, but it is best to crush and disperse it with a ball mill, sand mill, etc. and add it in the same way as the hot solvent while maintaining the shape of solid particles. preferable.

The amount of water-insoluble solid heat solvent added is usually 5% of the amount of binder.
Weight%~400mstone%, preferably 10%~300m
Weight%.

Furthermore, even when the melting point of the water-insoluble solid thermal solvent of the present invention is higher than the thermal development temperature, it was found that the melting point is lowered by adding it to the binder, and it acts effectively as a thermal solvent.

The above-mentioned thermal solvent used in the present invention must be contained in the image-receiving member, but in the present invention, the above-mentioned thermal solvent may be further contained in any layer of the photothermographic material. .

In the present invention, the image receiving member containing the above-mentioned thermal solvent is
It is sufficient to have a single or multiple image-receiving layers on the support, and basically have the function of stopping and fixing the image-wise distribution of the thermally transferred dye. Examples of suitable materials include polymers containing tertiary amines or quaternary ammonium salts as described in US Pat. No. 3,709,690. For example, as a polymer containing an ammonium salt, the ratio of polystyrene-N,N,N-tri-n-hexyl-N-vinyl-benzylammonium chloride is 1=4 to 4:1, preferably 1:1. be. Examples of polymers containing tertiary amines include polyvinyl and lysine. A typical image-receiving layer for diffusion transfer is obtained by mixing a polymer containing ammonium salt, tertiary amine, etc. with gelatin, polyvinyl alcohol, etc., and coating the mixture on a support. Another useful dye-receiving material is preferably a heat-resistant organic polymer material having a glass transition temperature of 40 DEG C. or more and 250 DEG C. or less, which is described in JP-A-57-207250.

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

An example of the heat-resistant organic polymer substance is the molecule fi 2
,000-85,000 polystyrene, carbon number 4
Polystyrene derivatives 1 having the following substituents, polyvinylcyclohexane, polyvinylbenzene, polyvinylpyrrolidone, polyvinylcarbazole, polyallylbenzene, polyacetals such as polyvinyl alcohol, polyvinyl formal and polyvinyl butyral, polyvinyl chloride, chlorinated polyethylene, Polytrichloride fluorinated ethylene, polyacrylonitrile, poly N, N-dimethylallylamide, polyacrylate with p-cyanophenyl group, pentachlorophenyl group and 2,4-dichlorophenyl group, polyacrylic chloroacrylate, polymethyl methacrylate, poly ethyl methacrylate,
Polypropyl methacrylate, polyisopropyl methacrylate, polyisobutyl methacrylate, polyte
Polyesters such as rt-butyl methacrylate, polycyclohexyl methacrylate, polyethylene glycol dimethacrylate, poly-2-cyano-ethyl methacrylate, polyethylene terephthalate, polycarbonates such as polysulfone, sphenol A polycarbonate, polyanhydrides, polyamides, and cellulose. Examples include acetates. Also, polymer
Handbook - Second Edition (edited by G.I. Brandrup and E.H. Inmargatsu) Lysine
Willie and Sons (Polymer Hand
book 2nd ed.

(J, 13randrup, E, H, I m
mergut i>J ohn W 1ley & 3 o
Also useful are synthetic polymers with a glass transition temperature of 40° C. or lower, which are described in the ns) publication. These polymeric substances may be used alone or in a blend of two or more types, or may be used in combination of two or more types as a copolymer.

Useful polymers include cellulose acetates such as triacetate and diacetate, polyamides in combinations such as heptamethylene diamine and terephthalic acid, fluorene propylamine and adipic acid, hexamethylene diamine and diphenic acid, hexamethylene diamine and isophthalic acid, and diethylene glycol. and diphenylcarboxylic acid, bis-p-carboxyphenoxybutane and ethylene glycol, polyester, polyethylene terephthalate, and polycarbonate. These polymers may be modified. For example, polyethylene terephthalate using cyclohexane dimetatool, isophthalic acid, methoxypolyethylene glycol, 1,2-dicarbomethoxy4-benzenesulfonic acid, etc. as a modifier is also effective.

e A preferable image receiving layer is disclosed in Japanese Patent Application Laid-Open No. 59-223425.
Layer made of polyvinyl chloride as described in No.
A layer consisting of polycarbonate and a plasticizer as described in No. 19138 may be mentioned.

These polymers can be used to create lfATD that also serves as a support and receiver (
It can also be used as an image receiving member), in which case the support may be formed from a single layer or from multiple layers.

As the support for the image-receiving member, any material such as a transparent support or an opaque support may be used. Supports containing pigments such as titanium oxide, barium acid, calcium carbonate, and talc, baryta paper, RC paper laminated with thermoplastic resin containing pigments on paper, cloth, glass, aluminum, etc. Also, on these supports, an electron beam curable resin composition containing a pigment was coated and cured, and on these supports, a coating layer containing a pigment was provided. Examples include supports.

In particular, a support that is coated with an electron beam curable resin composition containing a pigment on paper and cured, or a support that has a pigment coating layer directly on the paper or an electron beam curable resin composition on the pigment coating layer. The support coated with the composition and cured can be used as an image-receiving member as it is because the resin layer itself can be used as an image-receiving layer.

When the image-receiving layer is applied to a heat-developable color light-sensitive material, the various polymers mentioned above can be used as a mordant for the dye image. Image reception.

The image-receiving layer may be a single layer that is part of a heat-developable color photographic material. If necessary, an opacifier 1m (reflection layer) can be included in the photographic material, such layer transmitting the desired degree of radiation, e.g. visible light, which can be used to observe the dye image in the image-receiving layer. It is used for reflection. The opacifying layer (reflective layer) can contain various reagents that provide the necessary reflection, such as titanium dioxide.

The image-receiving layer can also be formed in a form that can be peeled off from the photosensitive layer. For example, after imagewise exposure of a heat-developable color photosensitive material, an image-receiving layer can be superimposed on the photosensitive layer and uniformly heat-developed.

Further, after imagewise exposure and uniform heating development of a heat-developable color light-sensitive material, a receiving layer may be superimposed and heated at a temperature lower than 19 degrees Celsius to transfer a dye image released from or formed from a dye-providing substance.

Various additives used in the photographic field can be used in the protective layer of the present invention. These additives include various matting agents, colloidal silica, slip agents, organic fluoro compounds (especially fluorosurfactants), antistatic agents, ultraviolet absorbers, high-boiling organic solvents, antioxidants, hydroquinone derivatives, and polymers. Examples include latex, surfactants (including polymeric surfactants), hardeners (including polymeric hardeners), organic normal salt particles, and non-photosensitive silver halide particles.

The matting agent used in the protective layer of the present invention is fine particles of an inorganic substance or a paid substance, which is incorporated into a heat-developable photosensitive material to increase the roughness of the surface of the photosensitive material and make it matte. be.

Matting agents are used to prevent adhesion that occurs during the production, storage, and use of photosensitive materials, and to prevent contact between similar or dissimilar substances, a! Methods for preventing charging caused by rubbing and peeling are well known in the art. Specific examples of matting agents include silicon dioxide described in JP-A-50-46316, alkyl methacrylate/methacrylate described in JP-A-53-7231, JP-A-58-66937, and JP-A-60-8894.
Alkali-soluble matting agents such as methacrylic acid copolymers, alkali-soluble polymers having anionic groups described in JP-A-58-166341, and two or more types of matting agents with different Mohs hardnesses as described in JP-A-58-145935. Combination of fine particle powder, combination of oil droplets and fine particle powder described in JP-A-58-147734, combination of two or more spherical matting agents with different average particle diameters as described in JP-A-59-149356, JP-A-56 −
The combined use of a fluorinated surfactant and a matting agent as described in No. 44411, British Patent No. 1,055.713, U.S. Pat. No. 1,939,213, U.S. Pat. No. 2,221,873, U.S. Pat. No. 662, No. 2,322,037,
2.376, 005, 2.391.181, 2,701,245, 2.992.101, 3.079.257, 3,262.782
No. 3.443.946, No. 3.516.832, No. 3,539.344, No. 3,591,379,
3,754,924, 3,767, 448,
Organic matting agent described in JP-A No. 49-10 (I821, No. 57-14835, etc.), West German Patent No. 2,529
, 321, British Patent No. 760.775, 1,26
No. 0.772, U.S. Patent No. 1.201.905, U.S. Patent No. 2
, No. 192,241, No. 3.053,662, No. 3,
No. 062,649, No. 3,257,206, No. 3.3
No. 22.555, No. 3,353,958, No. 3.37
No. 01951, □ Same, No. 3,411,907, Same 3
．． No. 437.484, No. 3.523,022, No. 437.484, No. 3.523,022, No.
No. 3,615,554, No. 3,635,714, No. 3.769.020, No. 4,021,245, No. 4
．． Inorganic matting agents described in No. 029.504 etc.
Or JP-A-46-7781, JP-A No. 49-10682
No. 1, No. 51-6017, No. 53-116143, No. 53-100226, No. 57-14835,
No. 57-82832, No. 53-70426, No. 5
Matting agents having physical properties such as those described in Japanese Patent Publication No. 9-149357, Japanese Patent Publication No. 57-9053, and EP-107,378 are preferably used.

In the protective layer of the present invention, the amount of the matting agent added is 10 mg 72.0 (J is preferable, more preferably 2
0m (1~1.Og. The particle size of the matting agent is 065~
101. tIll is preferable, more preferably 1.0~
The volume is 6 μl.

The matting agents may be used in combination of two or more.

Examples of the slipping agent used in the protective film of the present invention include solid paraffin, oil, surfactant, natural wax, synthetic wax, etc. Specifically, French Patent No. 2
．． 180.465, British Patent No. 955,061, British Patent No. 1.143.118, British Patent No. 1.270.578Q, British Patent No. 1
, 320.564, 1,320.757, JP-A-49-5017, JP-A-51-141623, JP-A-54
-159221, 56-81841, Research
Disclosure (Research Disclosure)
ure) 13969@, U.S. Patent No. 1,263,
No. 722, No. 2,588.765, No. 2,739,8
No. 91, No. 3,018.178, No. 3,042.5
No. 22, No. 3,080,317, No. 3, 082.0
No. 87, No. 3.121,060, No. 3,222.
No. 178, No. 3,295,979, No. 3,489,5
No. 67, No. 3.516.832, No. 3,658,57
No. 3, No. 3,679,411, No. 3,870.521
Those described in No. 1, etc. can be preferably used.

The protective layer of the present invention contains a high boiling point organic solvent (for example, U.S. Pat. No. 2,322,027, U.S. Pat.
No. 533,514, No. 2,182,157, Special Publication No. 4
No. 6-23233, British Patent No. 958,441, No. 1
, 222,753, U.S. Patent Nos. 2.353.262, 3.676, 142, 3.700.454,
Esters (e.g. phthalates, phosphoric esters, fatty acid esters, etc.), amides (e.g. fatty acid amides, (sulfonic acid amide, etc.), ethers, alcohols, paraffins, etc. ) may contain oil droplets in which a water-insoluble oil compound is emulsified and dispersed. Furthermore, these oil droplets may contain photographic additives for various purposes.

Binders used in the protective layer of the present invention include polyvinyl butyral, polyvinyl acetate, ethyl cellulose, polymethyl methacrylate, cellulose acetate butyrate, polyvinyl alcohol, polyvinyl pyrrolidone, polyethyl oxazoline, polyacrylamide,
One or a combination of two or more synthetic or natural polymeric substances such as gelatin and phthalated gelatin can be used.

In particular, gelatin (including gelatin derivatives), polyvinylpyrrolidone (molecular ffi 1,000-400,000
is preferable), polyvinyl alcohol (molecular weight 1.00
0 to 100,000 are preferred) and polyoxazolines (molecules ff1i, ooo to 800,000 are preferred)
A single binder or a combination of two or more of these binders are preferable, and a binder using gelatin alone or a combination of gelatin and a hydrophilic polymer having good compatibility with gelatin such as the above-mentioned polyvinylpyrrolidone, polyvinyl alcohol, and polyoxazoline is particularly preferable. Gelatin may be lime-treated, acid-treated, or ion-exchange treated, including ossein gelatin, big skin gelatin,
Hydrogelatin or modified gelatin obtained by esterifying or phenylcarbamoylating these gelatins may also be used.

The thickness of the protective layer of the present invention is preferably 0.05 to 5 μm, more preferably 0.1 to 1.0 μm. The protective layer may be a single layer or may be composed of two or more layers.

Further, in order to increase film strength and prevent film destruction, it is also preferable that the hardness of the protective layer is greater than that of the photosensitive layer. One way to make the hardness of the protective layer higher than that of the photosensitive layer, that is, to control the hardness of each layer, is to use a diffusion-resistant hardener. By using it in the protective layer, only the degree of hardness of the protective layer can be made greater than that of the photosensitive layer. Polymer hardeners are known as diffusion-resistant hardeners, such as those described in US Patent No. 3. (No. 157,723, 3.398.
No. 029, No. 4.161.407, JP-A-58-50
Hardeners described in No. 528 and the like can be used.

Another way to control the degree of dura for each layer is to
The protective layer can be formed by containing a diffusible hardener (for example, a vinyl sulfone hardener) only in the protective layer, or by making the protective layer contain more O than the photosensitive layer, and quickly drying it after simultaneous multilayer coating. The hardness of the photosensitive layer can be made greater than that of the photosensitive layer.

The heat-developable photosensitive material of the present invention basically contains (1) photosensitive silver halide, (2) reducing agent, (3) dye-providing substance, and (4) binder in one heat-developable photosensitive layer. It is preferable to contain (5) an organic silver salt as necessary. However, these do not necessarily have to be contained in a single photographic constituent layer; for example, the heat-developable photosensitive layer is divided into two parts, and the components (1), (2), (4), and (5) are If two or more constituent layers are in a state where they can react with each other, such as by containing a dye-providing substance (3) in a heat-developable photosensitive layer on one side and a dye-providing substance (3) in a layer on the other side adjacent to this photosensitive layer, It may be contained separately.

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

The heat-developable photosensitive material of the present invention has one or more heat-developable photosensitive layers on a support. In the case of color, it generally has three heat-developable photosensitive layers with different color sensitivities, and in each photosensitive layer, dyes with different hues are formed or released by heat development.

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

The structure of each layer can be arbitrarily selected depending on the purpose. For example, a structure in which a red-sensitive layer, a green-sensitive layer, and a blue-sensitive layer are sequentially formed on the support, or a structure in which a blue-sensitive layer is sequentially formed on the support 1. layer, a green-sensitive layer, a red-sensitive layer, or sequentially on a support,
There are configurations such as a green photosensitive layer, a red photosensitive layer, and a blue photosensitive layer.

In addition to the heat-developable photosensitive layer, the heat-developable photosensitive material of the present invention can be provided with non-photosensitive layers such as an undercoat layer, an intermediate layer, a protective layer, a filter layer, a backing layer, and a peeling layer. To coat the heat-developable photosensitive layer and these non-photosensitive layers on the support, a method similar to that used for coating and preparing general silver halide photosensitive materials can be applied.

That is, dip method, 0-coup method, reverse roll method, air knife method, doctor blade method, spray method,
There are methods and devices for the bead method, extrusion method, stretch flow method, curtain method, etc.

The photosensitive silver halide used in the present invention includes silver chloride, silver bromide, silver iodide, silver chlorobromide, silver chloroiodide, silver iodobromide,
Examples include silver chloroiodobromide. The photosensitive silver halide is
It can be prepared by any method in the photographic field, such as a single jet method or a double jet method. For example, by applying the method described in JP-A-54-48521, monodisperse silver halide grains can be obtained by the double jet method while keeping the DAQ constant. At that time, a highly monodisperse silver halide emulsion can be obtained by appropriately selecting the time function of the addition rate, I)H, I)A(], temperature, etc.A more preferred practical IN embodiment According to the above, it is possible to use a silver halide emulsion having silver halide grains having a shell.The silver halide grains having a shell can be prepared by preparing silver halide grains having good monodispersity using the method described above. A core can be obtained by sequentially growing shells on the core.

The monodisperse silver halide emulsion used in the present invention refers to an emulsion having a particle size distribution in which the variation in the silver halide grain size contained in the emulsion is less than a certain percentage of the average grain size as shown below. .

The grain size distribution of an emulsion (hereinafter referred to as a "monodisperse emulsion") consisting of a group of photosensitive silver halide grains with uniform grain morphology and small grain size variations is almost a normal distribution.
When the standard deviation is easily determined and the width of the distribution is defined by the relational expression, the width of the distribution of the silver halide grains used in the present invention is preferably 15% or less, more preferably 10% or less. It has a monodispersity of.

Also, for example, JP-A-58-111933, JP-A No. 58-1
No. 11934, No. 58-108526, Research Disclone No. t-22534, etc., it has two parallel crystal planes, and each of these crystal planes is different from other units of this particle. It is also possible to use a silver halide emulsion consisting of tabular silver halide grains having a larger area than the crystals and an aspect ratio, that is, a ratio of grain diameter to thickness of 5:1 or more.

Further, in the present invention, a silver halide emulsion containing internal latent image type silver halide grains whose surfaces have not been fogged in advance can be used. For internal latent image type silver halide whose surface is not prefogged, for example, U.S. Pat.
, No. 592,250, No. 3,20 (S, No. 313, No. 3,317,322, No. 3,511,662,
3.447,927, 3,761,266,
As described in Japanese Patent No. 3,703,58.1 and Japanese Patent No. 3,736.140, it is a silver halide grain in which the sensitivity inside the grain is higher than the sensitivity on the surface of the silver halide grain. The method for preparing silver halide emulsions containing these internal latent image type silver halides is as described in the above-mentioned patents, for example, by first preparing Ao C1 grains and then adding a small amount of bromide or iodide thereto. A method of adding a chemically sensitized silver halide to cause halide exchange, or a method of coating a central core of chemically sensitized silver halide with non-chemically sensitized silver halide, or a method of combining a chemically sensitized coarse grain emulsion with a chemically sensitized coarse grain emulsion. Many methods are known, such as a method in which a fine grain emulsion, either sensitized or not chemically sensitized, is mixed and the fine grain emulsion is deposited on a coarse grain emulsion. Also, U.S. Patent Nos. 3,271,157 and 3
, 447,927 and 3,531,291, or silver halide emulsions having silver halide grains containing polyvalent metal ions as described in U.S. Pat. A silver halide emulsion in which the grain surface of silver halide grains containing the described dopants is weakly chemically sensitized, or a laminated structure described in JP-A-50-8524 and JP-A-50-38525, etc. Silver halide emulsions consisting of grains with
These include silver halide emulsions described in Japanese Patent Application Laid-open No. 156614 and Japanese Patent Application Laid-open No. 127549/1983.

The light-sensitive silver halide emulsion may be chemically sensitized by any method known in the photographic art. Such sensitization methods include
Various methods include gold sensitization, sulfur sensitization, gold-sulfur sensitization, and reduction sensitization.

The silver halide in the above-mentioned photosensitive emulsion may be coarse grains or fine grains, but the preferred grain size is about 0.001 μm to about 1.5 μm, more preferably about 0.001 μm to about 1.5 μm. It is 0.01 μm to about 0.5 μm.

The light-sensitive silver halide emulsion prepared as described above can most preferably be applied to the heat-developable photographic image which is a constituent layer of the light-sensitive material of the present invention.

In the present invention, as another method for preparing photosensitive silver halide, it is also possible to allow a photosensitive silver salt-forming component to coexist with an organic silver salt described below to form photosensitive silver halide in a part of the organic silver salt. . The photosensitive silver salt forming component used in this preparation method is an inorganic halide, for example, a halide represented by MXn (where M is an H atom, NH+iJ
Alternatively, it represents a metal atom, X represents C2, 3r or I, n represents 1 when M is an H atom or an N84 group, and represents its valence when M is a metal atom. Metal atoms include lithium, sodium, potassium, rubidium, cesium, copper, gold, beryllium, magnesium, calcium, strontium, barium, zinc, cadmium, mercury, aluminum, indium, lanthanum, ruthenium, thallium, germanilum, tin, and lead. , antimony, bismuth, chromium, molybdenum, tungsten, manganese, rhenium,
Examples include iron, cobalt, nickel, rhodium, palladium, osmium, iridium, platinum, and cerium.

), halogen-containing metal complexes (e.g., K2 PtCff1
s, K2PtBrs, 1-(All C
ff1+.

(NH4)2 1r Cff1s , (NH4)3
[r C14゜(NH4)2”””RIJ Cff
1s, (NH4)3RLI C1y.

(NH4)2 Rh Cff1s, (NH side)S
Rh Br6, etc.), onium halides (e.g., tetramethylammonium bromide, trimethylphenylammonium bromide, cetylethyldimethylammonium bromide, 3-methylthiazolium bromide,
4 such as trimethylbenzylammonium bromide
grade ammonium halides, quaternary phosphonium halides such as tetraethylphosphonium bromide,
tertiary sulfonium halides such as benzylethylmethylsulfonium bromide, 1-ethylthiazolium bromide, etc.), halogenated hydrocarbons (e.g., iodoform, bromoform, carbon tetrabromide, 2-bromo-2-methylpropane, etc.), N-halogen compounds (N-chlorosuccinimide, N-bromosuccinimide, N-bromophthalimide, N-bromoacetamide, N-iodosuccinimide, N-bromophthalazinone, N-chlorophthalazinone, N-bromo Acetanilide, N,N-dibromobenzenesulfonamide, N-bromo-N-methylbenzenesulfonamide, 1,3-dibromo-4,4
-dimethylhydantoin, etc.), and other halogen-containing compounds (for example, triphenylmethyl chloride, triphenylmethyl bromide, 2-bromobutyric acid, 2-bromoethanol, etc.).

These photosensitive silver halides and photosensitive silver salt forming components can be used in combination in various methods, and the amounts used are -
It is preferably O,001g to 50o, more preferably 0.1g to 10g per m per 1f of support.
It is.

The heat-developable photosensitive material of the present invention has a multilayer structure including each layer sensitive to blue light, green light, and red light, that is, a heat-developable blue-sensitive layer, a heat-developable green-sensitive layer, and a heat-developable red-sensitive layer. You can also do that. Further, the same color photosensitive layer can be divided into two or more layers (for example, a high-sensitivity layer and a low-sensitivity layer).

In the above case, the blue-sensitive silver halide emulsion, green-sensitive silver halide emulsion, and red-sensitive silver halide emulsion used, respectively, can be obtained by adding various spectral sensitizing dyes to the silver halide emulsion. I can do it.

Typical spectral sensitizing dyes used in the present invention include, for example, cyanine, merocyanine, complex (trinuclear or tetranuclear) cyanine, holopolar cyanine, styryl, hemicyanine, oxonol, and the like. Among the cyanine dyes, those having a basic nucleus such as thiazoline, oxazoline, pyrroline, pyridine, oxazole, thiazole, selenazole, and imidazole are more preferred. Such nuclei include alkyl groups, alkylene groups,
It may contain a hydroxyalkyl group, a sulfoalkyl group, a carboxyalkyl group, an aminoalkyl group or an enamine group capable of forming a fused carbocyclic or heterocyclic ring. Further, it may be symmetrical or asymmetrical, and the methine chain or polymethine chain may have an alkyl group, a phenyl group, an enamine group, or a hetero rM substituent.

In addition to the above-mentioned basic nucleus, merocyanine dyes have acidic nuclei such as diohydantoin nucleus, rhodanine nucleus, oxazolidione nucleus, thiazolidinedione 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 carboxyalkyl group, a hydroxyalkyl group, an alkoxyalkyl group, an alkylamine group or a heterocyclic nucleus. If necessary, these dyes may be used in combination. Furthermore, ascorbic 'fli derivatives, azaindene cadmium salts, organic sulfonic acids, etc., such as U.S. Pat. Nos. 2,933,390 and 2,937,0
A highly sensitive 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 sensitizing dyes added is 1.times.10.times.1 mole to 1 mole per mole of photosensitive silver halide or silver halide forming component. More preferably 1X 10-'' mole to 1X
It is 10-1 mol.

In the heat-developable photosensitive material of the present invention, various kinds of salts can be used, if necessary, for the purpose of increasing sensitivity and improving developability.

Examples of organic silver salts used in the heat-developable photosensitive material of the present invention include those disclosed in Japanese Patent Publication Nos. 43-4921, 52626-1980, 141222-1982, 36224-1983, and 37610-1980, etc. Long-chain aliphatic carboxylic acids as described in each publication and specifications such as U.S. Patent Nos. 3,330,633, 3,794,496, and 4,105,451 Silver salts of carboxylic acids having two heterocycles, such as silver laurate, silver myristate, silver valmitate, silver stearate, silver arachidonate, silver behenate, α-(1-phenyltetrazolethio)acetic acid Silver, aromatic carboxylic acid silver, such as silver, silver phthalate, etc., Special Publication 1977-26! M! 2M, No. 45-12700, No. 45-18416, No. 45-
No. 22185, JP-A-52-137321, JP-A-5
There are silver salts of imino groups described in publications such as No. 8-118638, No. 58-118639, and U.S. Pat. No. 4.123.274.

Examples of silver salts of imino groups include silver benztriazole. The penztriazole silver may be substituted or unsubstituted. Representative examples of substituted benztriazole silver include, for example, alkyl-substituted benztriazole silver (preferably an alkyl group of 022 or less,
Silver alkylamidebenztriazole (preferably substituted with an alkyl group of 022 or less, such as silver methylbenztriazole, silver ethylbenztriazole, silver n-octylbenztriazole, etc.), preferably silver substituted with an alkyl group of C4 or less Substituted ones, such as silver acetamidobenztriazole, silver propionamidebenztriazole, silver 1so-butylamidebenztriazole, silver laurylamidebenztriazole, etc.), silver alkylsulf 7-moylbenztriazole (preferably alkylsulfamoyl of 022 or less) those substituted with groups, such as 4-(N,N-diethylsulfamoyl)penztriazole silver, 4-(N-propylsulfamoyl)penztriazole silver, 4-<N
-octylsulfamoyl)penztriazole silver, 4
silver salts of halogen-substituted benztriazoles (for example, silver 5-chlorobenztriazole, 5-bromobenz]) heliazole silver, etc.), alkoxybenztriazole silver (preferably substituted with an alkoxy group of 022 or less, more preferably a C4 or less alkoxy group, such as 5-methoxybenztriazole silver, 5-ethoxybenztriazole silver, etc.), 5-nitrobenztriazole silver, 5-aminobenztriazole silver, 4-hydroxybenztriazole silver, 5-carboxybenztriazole silver, 4-sulfobenztriazole silver, 5
-silver sulfobenztriazole, and the like.

Examples of other silver salts having an imino group include imidazole silver, benzimidazole silver, 6-nidropenzimidazole silver, pyrazole silver, urazole silver, 1,2
．． Silver salts of other mercapto compounds such as 4-triazole silver, 1H-tetrazole silver, 3-amino-5-benzylthio-1,2,4-triazole silver, saccharin silver, phthalazinone silver, phthalimide silver, etc., such as 2-mercaptobenzoxazole Silver, mercaptooxadiazole silver, 2-mercaptobenzothiazole silver, 2-mercaptobenzimidazole silver, 3-mercapto-4-phenyl-1,2,4-t-lyazole silver, 4-hydroxy-
6-methyl-1,3°3a, 7-tetrazaindene silver and 5-methyl-7-hydroxy-1,2,3,4,6
- Silver pentazaindene and the like can be mentioned.

In addition, silver complex compounds having a stability constant of 4.5-10.0 as described in JP-A No. 1r (52-31728), silver complex compounds as described in U.S. Pat. No. 4,168,980, etc. A silver salt of imidacillinthion or the like is used.

Among the above organic silver salts, imino group silver salts are preferred;
In particular, 5-methylbenzotriazole and its derivatives, sulfobenzotriazole and its derivatives, and N-alkylsulf 7-moylbenzotriazole and its derivatives are more preferable than the benzotriazole derivative silver jn1.

The organic silver salts used in the present invention may be used alone or in combination of two or more. Further, a silver salt may be prepared in a suitable binder and used as it is without isolation, or the isolated salt may be dispersed in a binder by an appropriate means and used. Dispersion methods include, but are not limited to, ball mills, sand mills, colloid mills, vibration mills, and the like.

In addition, the method for preparing organic silver salts is generally to dissolve silver nitrate and raw organic compounds in water or an organic solvent and mix them, but if necessary, a binder may be added or a solution such as sodium hydroxide may be added. It is also effective to add an alkali to promote dissolution of organic compounds, or to use an ammoniacal silver nitrate solution.

The amount of the organic silver salt used is generally preferably 0.01 to 500 mol, more preferably 0.1 to 100 mol, per 1 mol of photosensitive silver halide. Moreover, it is more preferably 0.3 to 30 mol.

As the reducing agent used in the photothermographic material of the present invention, those commonly used in the field of photothermographic materials can be used.

The dye-providing substance used in the heat-developable photosensitive material of the present invention is, for example, JP-A-57-186744;
-79247, 58-149046, 58
-149047, 59-124339, 5
In the case of a dye-donating substance that releases or forms a diffusible dye by coupling with an oxidized form of a reducing agent such as those disclosed in No. 9-181345 and No. 60-2950, the present invention Examples of reducing agents used in
61,270, 3.764.328 specifications,
Also, RD No. 12146, No. 0.151
08, same N 0.15127 and JP-A-56-271
p-phenylenediamine series and p-phenylene diamines described in Publication No. 32
- An amine phenol type developing agent, a phosphoramidophenol type developing agent, a sulfonamide phenol type developing agent, a sulfonamide aniline type developing agent, a hydrazone type color developing agent, etc. can be used. Also, U.S. Patent No. 3
, 342,599, 3,119.492, and JP-A-53-135628, JP-A-54-79035, and the like can also be advantageously used.

As a particularly preferable reducing agent, JP-A-56-146133
Examples include reducing agents represented by the following general formula (1) described in No.

General formula (1) In the formula, R1 and R2 represent a hydrogen atom or an alkyl group having 1 to 30 carbon atoms (preferably 1 to 4) that may have a substituent, and R1 and R2 are ring-closed. may be used to form a heterocycle. R3, R4゜R5 and R6 each have a hydrogen atom, a halogen atom, a hydroxy group, an amine group, an alkoxy group, an acylamide group, a sulfonamide group, an alkylsulfonamide group, or a carbon atom number 1 which may have a substituent.
~30 (preferably 1 to 4) alkyl groups, R
3 and R1 and R5 and R2 may each be ring-closed to form a heterocycle. M represents an alkali metal atom, an ammonium group, a nitrogen-containing e1 base, or a compound containing a quaternary nitrogen atom.

Nitrogen-containing Ij in the above general formula (1)! What is a base?
It is an organic compound containing a basic nitrogen atom that can form salts, and particularly important organic bases include amine compounds. And as a chain amine compound, the first
Typical examples of cyclic amine compounds include lysine, quinoline, piperidine, and imidazole. In addition, compounds such as hydroxylamine, hydrazine, and amidine are also useful as chain amines. As the salt of the nitrogen-containing base, inorganic M salts of organic bases such as those mentioned above (eg, salts!1!2 salts, sulfates, nitrates, etc.) are preferably used.

On the other hand, examples of the compound containing quaternary nitrogen in the above general formula include salts or hydroxides of nitrogen compounds having a tetravalent covalent bond.

Blank space below Next, preferred specific examples of the reducing agent represented by the general formula (1) are shown below f0 (R-5) = A# ~ CHs C, H4NHCOCH.

C.F.

(R-20) (R-21) (R-22) (R-23) The reducing agent represented by the above general formula (1) can be prepared by a known method,
For example, Huiben Peil, Mesosden der Organizien Hemi, Band XI/2 (1-1 oube
n-Weyl, Methoden der○rg
anischen Chemie, 3andX
I/2) can be synthesized according to the method described on pages 645-703.

Furthermore, it is also possible to use two or more of the above-mentioned reducing agents at the same time, or to use a black and white developing agent described below in combination for the purpose of increasing developability.

Further, the dye-donating substance used in the present invention releases the dye by oxidation as shown in JP-A-57-179840, JP-A-58-58543, JP-A-59-152440, JP-A-59-154445, etc. In the case of compounds that release dyes when oxidized, compounds that release dyes when reduced, etc. (or when simply producing a silver image), the developing agent described below can be used. You can also use stories.

For example, phenols (e.g. [I-phenylphenol, p-methoxynaphthol, 2,6-di-tert
-butyl-p-cresol, N-methyl-p-aminophenol, etc.), sulfonamidophenols [e.g.
-Benzenesulfonamidophenol, 2-benzenesulfonamidophenol, 2,6-dichloro-4-benzenesulfonamidophenol, 2,6-dibromo-4
-(1)-toluenesulfonamide) phenol, etc.],
or polyhydroxybenzenes (e.g. hydroquinone, tert-butylhydroquinone, 2,6-dimethylhydroquinone, chlorohydroquinone, levoxyhydroquinone, catechol, 3-carboxycatechol α-naphthol, β-naphthol, 4- 1.1
'-dihydroxy-2.2'-binaphthyl, 6.6'
-dibromo-2,2'-dihydroxy-1,1'-binaphthyl, 6,6-sinitro-2,2'-dihydroxy-
1.1'-binaphthyl, 4,4'-dimethoxy-1.1
'-dihydroxy-2,2'-binaphthyl, bis(2-
1-bis(2-hydroxy-3,5-dimethylphenyl)-3゜5.5-trimepurhexane, 1.1 -bis-2-hydroxy-3-te
rt-butyl-5-methylphenyl)methane, 1.1-
Bis(2-hydroxy-3,5-di-tert-butylphenyl)methane, 2,6-methylenebis(2-and-droxy-3-tert-butyl-5-methylphenyl)-
4-Methylphenol, α-phenyl-α, α-bis(
2-hydroxy-3-tert-butyl-5-methylphenyl)methane, 1,1-bis(2-hydroxy-3,
5-dimethylphenyl)-2-methylpro.

Pan, 1,1,5,5-tetrakis(2-hydroxy-
3,5-dimethylphenyl)-2,4-ethylpentane, 2,2-bis(4-hydroxy-3,5-dimethylphenyl)propane, 2,2-bis(4-hydroxy-3
-Mebru 5-tert-butylphenyl)propane, 2,2-bis(4-hydroxy-3,5-di-te)
rt-butylphenyl)propane, etc.], ascorbic acids, 3-pyrazolidones, pyrazolones, hydrazones, and paraphenylenediamines.

The above-mentioned phenol agents can also be used alone or in combinations of 21 or more.

The amount of the reducing agent used in the heat development (1) photosensitive material of the present invention depends on the type of photosensitive halogen used, the type of silver salt used, the type of other additives, etc. However, it is usually 0.00% per mole of photosensitive silver halide.
The range is from 0.01 to 1500 mol, preferably from 0.1 to 1500 mol.
It is 200 moles.

Examples of the binder used in the heat-developable photosensitive material of the present invention include synthetic binders such as polyvinyl butyral, polyvinyl acetate, ethyl cellulose, polymethyl methacrylate, cellulose acetate butyrate, polyvinyl alcohol, polyvinyl pyrrolidone, gelatin, and phthalated gelatin. One or a combination of two or more natural polymeric substances can be used. In particular, it is preferable to use gelatin or a derivative thereof in combination with a hydrophilic polymer such as polyvinylpyrrolidone or polyvinyl alcohol, and more preferably the following binder described in JP-A-59-229556.

This binder includes gelatin and vinylpyrrolidone polymer. The vinylpyrrolidone polymer may be polyvinylpyrrolidone, which is a homopolymer of vinylpyrrolidone, or a copolymer (including a graft copolymer) of vinylpyrrolidone and one or more monomers copolymerizable with vinylpyrrolidone. ). These polymers can be used regardless of their quality. The polyvinylpyrrolidone may be H1i polyvinylpyrrolidone,
Preferred polyvinylpyrrolidone has a molecular weight of +,000 to 4
00.000. Monomers copolymerizable with vinylpyrrolidone include (meth)acrylic esters such as acrylic acid, methacrylic acid and alkyl esters thereof, vinyl alcohols, vinyl acetates, vinyl imidazoles, (meth)acrylamides,
Examples include vinyl carbinols, vinyl alkyl ethers, and other vinyl fibers, but it is preferable that polyvinylpyrrolidone accounts for at least 20% of the composition. Preferred examples of such copolymers have a molecular weight of 5,000 to 400,000.

Piratin may be obtained by lime treatment or acid treatment, and may be ossein gelatin, big skin gelatin, hydrogelatin, or modified gelatin obtained by esterifying or phenylcarbamoylating these.

In the above binder, gelatin preferably accounts for 10 to 90%, more preferably 20 to 60%, and vinylpyrrolidone accounts for 5 to 90% of the total binder 1n.
%, more preferably 10 to 80%
It is.

The binder may contain other polymeric substances,
A combination of gelatin and polyvinylpyrrolidone with a molecular ω of 1,000 to 400,000 and one or more polymeric substances, pyratin and a molecular ω of ω 1,000 to 400,000.
A mixture of 0 vinylpyrrolidone copolymer and one or more other polymeric substances is preferred. Examples of polymeric substances used include polyvinyl alcohol, polyacrylamide, polymethacrylamide, polyvinyl butyral, polyethylene glycol, polyethylene glycol ester, or proteins such as cellulose 71,
Natural substances such as starch, polysaccharides such as gum arabic and the like can be mentioned. These range from 0 to 85%, preferably from 0 to 70%
% may be contained.

Note that the vinyl pyrrolidone polymer may be a crosslinked polymer, but in this case, it is preferable to crosslink it after coating it on the support (including the case where the crosslinking reaction progresses by leaving it to stand).

The usage of the binder is usually o.
It is 1 g to 10 g.

In addition, the binder is 0.1% per 1g of the dye-providing substance.
It is preferable to use ~1oQ, more preferably 0°2
It is 5-4Q.

The support used in the heat-developable photosensitive material of the present invention includes:
For example, polyethylene film, cellulose acetate film and polyethylene terephthalate film, synthetic plastic films such as polyvinyl chloride, paper supports such as photographic base paper, stamp 11 paper, baryta paper and resin coated paper, and furthermore, on these supports Examples include a support coated with an electron beam hardened VL resin composition and cured.

In addition to the above-mentioned components, the thermal photosensitive composition of the present invention may contain additives as required.

For example, melt formers such as ahitamide and succinimide described in U.S. Pat. No. 3,438,776; compounds such as polyalkylene glycols described in U.S. Pat. , 100-1-502- described in U.S. Patent No. 3,667.959.
There are non-aqueous elastic organic compounds having a melting point of 20° C. or higher, such as lactones having 1-80- groups.

Benzophenone derivatives described in Zarani JP-A-49-115540, JP-A No. 153-2482Q, JP-A No. 53
Phenol derivatives described in JP-A No. 60223, carboxylic acids described in JP-A-58-118640, polyhydric alcohols described in JP-A-58-198038, and phenol derivatives described in JP-A-59-84236. Also included are sulfamoylamide compounds and the like.

Further, a color toning agent known in the heat-developable photosensitive material may be added as a development accelerator to the heat-developable photosensitive material of the present invention. As a color toning agent, for example, JP-A-46-4
No. 928, No. 40-0077, No. 49-5019@,
No. 49-5020, No. 49-91215, No. 49-
No. 107127, No. 50-2524, No. 50-67
No. 132, No. 5O-67G41, No. 50-1142
No. 17, No. 52-33722, No. 52-99813, No. 53-1020, No. 53-55115, No. 5
3-7f3020, 53-125014, 54
-156523, 54-156524, 54-
No. 156525, No. 54-15652 (No. 3, No. 55-
No. 4060, No. 55-40.61, No. 55-3201
Publications such as No. 5 and West German Patent No. 2,140,406, West German Patent No. 2,141゜0 [13, West German Patent No. 2,220,618]
No. 3,847,612, U.S. Patent No. 3,782
, No. 941, No. 4,201,582, and No. 11, No. 57-207244, No. 57-207245, No. 5
Phthalazinone, phthalimide, pyrazolone, quinazolinone, N-hydroxynaphthalimide, benzoxine, naphtho, oxazinedione, 2,3, which are compounds described in Mei 1111, such as No. 8-189628 and No. 58-193541. -dihydro-phthalazinedione, 2,3-dihydro-1,3-oginadine-2,4-dione, oxypyridine, aminopyridine, hydroxyquinoline, aminoquinoline, isocarbostyryl, sulfonamide, 2H-1,3-benzothiazine -2,4-(
3H) dione, benzotriazine, mercapto-1-heriazole, dimerkabutotetrazabentalene, aminomercap]-triazole, acylaminomercaptophthalate, nuclic acid, phthalimine rf, etc., and one or more of these and imidazole compounds, as well as phthalate, nuclide acid, etc.) or acid anhydrides (1 phthalazine and 1 phthalazine), 1'yJ
Examples include mixtures of phthalazine and maleic acid, combinations of phthalazine, maleic acid, itacone, quinolinic acid, and gentisin.

As antifoggants, for example, U.S. Pat.
, higher fatty acids (e.g. behenic acid, stearic acid, etc.) described in JP-A-47-11113, N mercury salts described in JP-A-47-47419,
- halogen compounds (e.g. N-halogenoacetamide,
N-halogenosuccinimide, etc.), Yoneda-machi JT No. 3.7
00.457, mercapto compound-releasing compounds described in JP-A No. 51-50725, arylsulfonic acids (e.g. benzenesulfonic acid, etc.) described in JP-A No. 49-12501G, carboxylic acids described in JP-A No. 51-47419. Sodium salts (e.g. lithium laurate), British Patent No. 1,
455,271, oxidizing agents (e.g. perchlorates, peroxides, persulfates, etc.) described in JP-A-50-101019, sulfinic acids or thiosulfonic acids described in JP-A-53-19825, 2-thiouracils described in No. 51-3223, simple sulfur described in No. 51-2GO19, No. 51-42529, No. 51-81124
Disulfide and polysulfide compounds described in No. 55-93149, rosins or diterpenes (e.g. abietic acid, pimaric acid, etc.) described in No. 51-57435, free carboxyl groups described in No. 51-104338, or polymeric acids with sulfonic acid groups,
Thiazolinthione described in U.S. Pat. No. 4,138,265, JP-A-54-51821, U.S. Pat.
1.2.4-triazole or 5-mercapto-1,2,4-triazole described in 37.079
Thiosulfinic acid esters described in No. 5-140833, 1.2,3.4- described in No. 55-142331
Thia-1-lyazoles, No. 59-4G641, No. 59
-57233, the dihalogen compound or dihalogen compound described in No. 559-5r23a, and also the dihalogen compound described in No. 559-5r23a,
Examples include diol compounds described in No. 9-111636.

In addition, as an anti-fogging agent for ponds, Japanese Patent Application No. 59-565
Hyde 0 quinone derivatives described in No. 06 (for example, G[
-octylhydroquinone, dodecanylhydroquinone, etc.) or the hydroquinone derivatives described in Japanese Patent Application No. 1983-6 SAAO in combination with benzotriazole x 39 ct (e.g., 4-sulfobenzotriazole, 5-carboxybenzotriazole, etc.) are preferably used. be able to.

As a silver image stabilizer, U.S. Patent No. 3.707.37
5-methoxycarbonylthio-1-phenyltetrazole, as described in Belgian Patent No. 7138.071; Monohalo compounds described in JP-A-50-119624 (e.g., 2-bromo-2-tolylsulfonylacetamide, etc.); bromine compounds described in JP-A-50-120328 (e.g., 2-bromomethylsulfonylbenzothiazole); , 2,4-bis(1-libromomethyl)-6-methyl-1-riazine, etc.), and tribromoethanol described in JP-A-53-46020. Also, various monohalogenated organic antifoggants for silver halide emulsions as described in JP-A-50-119624 can be used.

Other image stabilizers include U.S. Pat. No. 3,220;
No. 84G, No. 4,082,555, No. 4,088
, No. 496, JP-A-50-22625, Research Disclosure (RD) No. 12021, 15
No. 168, No. 15567, No. 15732, No. 1
No. 5733, No. 15734, No. 15776, etc. (
ζ Compounds that release basic substances by heat called Activate Precar, such as guanidinium trichloroaretate, which releases lil by decarboxylation with heat, and aldanamide-based compounds such as galactonamide. Compounds such as compounds, amine imides, 2-carboxycarboxamides, and JP-A-5G-130745
No. 56-132332, a sodium phosphate base generator, a compound that generates an amine by an intramolecular cough reaction described in British Patent No. 2.079.480,
Aldoxime carbamates described in JP-A-59-157637, JP-A No. 59-IG (hydroxamic acid carbamate described in JP-A No.
No. 37, No. 59-174830, No. 59195237
Examples include base release agents described in No. 1, etc.

Furthermore, U.S. Patent Nos. 3.301.678 and 3.506
．． 444, 3,824.103, 3.844
．． 788@, RD12035, RD1801G, etc., iridium-based compounds, S-rubamoyl derivatives of mercapto-containing compounds, and nitrogen-containing polycyclic compounds may be used for the purpose of stabilizing images. U.S. Patent No. 3.669.670, U.S. Patent No. 4,012,260,
No. 4,060,420, No. 4,207,392,
Nitrogen-containing paid bases called activator stabilizers and activator stabilizer breakers described in RD 15109 Tan, RD 17711, etc., such as α-sulfonyl of 2-aminothiazoline [
Salts, trichloroacetic acid salts, acylhydrazine compounds, etc. can be used for the purpose of accelerating development, or for stabilizing images.

Also, for example, JP-A-56-130745 and JP-A-59-2
Development may be carried out in the presence of a small amount of water as described in U.S. Pat. .3
12.550, etc., development may be carried out using hot steam, hot air containing moisture, or the like. In addition, thermal development photosensitive U
Compounds that release water in II, for example, Japanese Patent Publication No. 44-26
Compounds containing water of crystallization such as those described in No. 582, such as sodium phosphate dodecahydrate and ammonium alum diquadrate, may be incorporated into the photothermographic material.

Various additives such as antihalation dyes, optical brighteners, hardeners, antistatic agents, plasticizers, and spreading agents, coating aids, etc. may also be used in the pond.

The heat-developable photosensitive material of the present invention includes a thermal phenomenon photosensitive layer and/or a non-photosensitive layer (for example,
Colloidal silica can be used for the undercoat layer, intermediate layer, protective layer, etc.).

The colloidal silica used in the present invention is a colloidal solution of anhydrous silica with an average particle size of 3 to 120 Il+μ mainly using water as a dispersion medium, and the main component is SiO2 (silicon dioxide). Colloidal silica is described, for example, in JP-A-56-1093313, JP-A-53-123916, JP-A-53-112732, and JP-A-53-100226. The amount of colloidal silica used is preferably in the range of 0.05 to 2.0 in dry ffufa ratio to the binder of the layer to be mixed and coated.

The heat-developable photosensitive material of the present invention includes a heat-developable photosensitive layer and/or a non-photosensitive layer (for example,
An organic fluoro compound can be used for the undercoat layer, intermediate layer, protective layer, etc.).

Regarding the organic fluoro compounds used in the present invention, US Pat.
No. 3,754,924, No. 3,775.126, No. 3,850,640, West German Patent Publication No. 1,942
, No. 665, No. 1,961,638, No. 2,124,
No. 262, British Patent No. 1,330,356, Belgian Patent No. 742,680, and JP-A-46-7781, No. 48-9715, No. 49-46733, No. 49
-No. 133023, 50-'19529, 50-
No. 11322, No. 5O-IGO034, No. 51-43
No. 131, No. 51-129229, No. 5l-10G4
No. 19, No. 53-84712, No. 54-11133
No. 0, No. 5G-109336, No. 59-30536
No. 59-45441 and Special Publication No. 47-9303
No. 48-43130, No. 59-5887, etc., and these compounds can be preferably used.

The thermal phenomenon photosensitive layer of the present invention includes a thermal phenomenon photosensitive layer and/or
Alternatively, an antistatic agent can be used in a non-photosensitive layer (for example, an undercoat layer, an intermediate layer, a protective layer, etc.).

As the antistatic agent used in the present invention, British Patent No. 1
, No. 466.600, Research Disclosure
(Research D 1 closure) 1
No. 5840, No. 16253, No. 16630@, U.S. Patent No. 2.327.82aq, U.S. Patent No. 2,861,056,
3.206.312, 3,245,833, 3,428,451, 3.775.126, 3
．． No. 9635498, No. 4.025.342, No. 4,
No. 025,4133, No. 4.025,691, No. 4,
025,70.1 and the like, and these can be preferably used.

The heat-developable photosensitive material of the present invention includes a thermal phenomenon photosensitive layer and/or
Alternatively, an ultraviolet absorber can be used in a non-photosensitive layer (for example, an undercoat layer, an intermediate layer, (!a layer, etc.)).

The ultraviolet absorbers used in the present invention include benzophenone compounds (e.g., JP-A-46-2784, U.S. Pat. No. 3,215,530, U.S. Pat. No. 3.6'), those described in 3.907. ), acudiene compounds (e.g., those described in U.S. Pat. No. t, 645,229), 4-deazolidone compounds (e.g., U.S. Pat. No. 3,314,794)
Benzotriazole compounds substituted with an aryl group (e.g. Japanese Patent Publication No. 3G-10466, Japanese Patent Publication No. 41-1687, Japanese Patent Publication No. 41-1687)
2-26187@, No. 44-29G20, No. 48-4
No. 15'72, JP-A-54-95233, JP-A No. 57-1
No. 42975, U.S. Patent No. 3.253.921, U.S. Pat.
, 533, No. 7'111, No. 3,754,919, No. 3,794,493, No. 4.009,038, No.
4.220.711, 4.323.633, Research Disclosure (Research[)i
sclosure ) as described in No. 22519)
, benzoxidole compounds (e.g., those described in U.S. All Patent No. 3,700.455), nisder cinnamate compounds (e.g., those described in U.S. Pat. No. 3,705,805,
3.707.375 and JP-A-52-49029). In general, those described in U.S. Pat. No. 3,499.7G2 and JP-A-54-48535 can also be used. Ultraviolet-absorbing couplers (e.g., cyan dye-forming couplers of α-naph 1--ol) and ultraviolet-absorbing polymers (e.g., JP-A-58-111942, JP-A-178351, JP-A-1810)
No. 41, No. 59-19945, No. 23344, and those described in the official gazette).

The thermal phenomenon photosensitive material of the present invention includes a heat-developable photosensitive layer and/or
Alternatively, a hardening agent can be used in a non-photosensitive layer (for example, an undercoat layer, an intermediate layer, a protective layer, etc.).

Hardeners used in the present invention include aldehyde-based and aziridine-based hardeners (for example, PB Report 19,921, U.S. Patent No. 2,950,197, U.S. Patent No. 2.964.404).
@, No. 2,983,611, No. 3.271.17
Specifications of No. 5, Japanese Patent Publication No. 4B-40898, Japanese Patent Publication No. 5
No. 0-91315), isoxazole systems (e.g., those described in U.S. Pat. No. 331,609), epoxy systems (e.g., U.S. Pat. No. 3,0-91315),
No. 47,394, West German Patent No. 1,085,663, British Patent No. 1,033,518, each town aS, Special Publication No. 1973
-35495), vinyl sulfone type (e.g. PB Report 19,920, West German Patent No. 1)
, No. 100.942, No. 2,337.5112, No. 2
, No. 545.722, No. 2,635,518, No. 2,
No. 742.30111, No. 2.749.2 (No. iO, British Patent No. 1,251,001, Patent Application No. 1974-5423)
No. 6, No. 48-11099G, U.S. Patent No. 3.539
, No. 644 and No. 3,490,911), acryloyl type (for example, patent application Df348)
-27949 and U.S. Pat. No. 3,640.720), carbodiimide systems (e.g., U.S. Pat. No. 2,938,892 and U.S. Pat. No. 4,043,818)
No. 4,061.499, each specification, Special Publication No. 4 (3)
-38715@Publication, Patent Application No. 15095/1983 Mingfa
triazine type (for example, West German Patent No. 2,410,973, West German Patent No. 2.553.915, US Pat.
12722), maleimide-based, acebrene-based, methanesulfonic acid ester-based, and N-methylol-based hardeners can be used alone or in combination. As a useful combination technique, for example, West German patent 7jS
No. 2,447,587, No. 2,505.746, No. 2
, 514,245@, specifications of U.S. Pat.
No. t32, No. 52-127329, Special Publication No. 1977-32
Examples include combinations described in each publication of No. 364@.

The photosensitive material of the present invention includes a heat-developable photosensitive layer and/or
or non-photosensitive layers (e.g. subbing layer, interlayer, protective & F5
etc.), a polymeric hardener can be used.

Examples of the polymer hardening agent used in the present invention include polymers having aldehyde groups (e.g., acrolein copolymers) described in U.S. Pat. No. 3.39G, 029, and U.S. Pat. Polymers containing dichlorotriazine groups described in Research Ice Clothes P-17333 (1978) and others, U.S. Patent No. 3,62
Polymer having epoxy groups as described in No. 3,878, Research Disclosure 1 (No. i725 (197
8), U.S. Patent No. 4.161.407, Japanese Patent Application Publication No. 1983
Polymers having an active vinyl group or a 1q group which is a precursor thereof, as described in JP-A-65033 and JP-A-56-142524, and polymers having an active ester group as described in JP-A-56-66841, etc. Can be mentioned.

The unfortunate situation of the present invention [The photosensitive material'Fil] contains a thermal phenomenon photosensitive layer and/or a non-photosensitive layer (for example, an undercoat layer, an intermediate layer, a protective layer, etc.) for the purpose of improving the physical properties of the film. Polymer latex can be used.

Preferred specific examples of the polymer latex used in the present invention include polyethyl acrylate, polyethyl acrylate, polylobyl acrylate, a copolymer of nibble acrylate and acrylic acid, a copolymer of nylidene chloride and butyl acrylate, and butyl acrylate-1-
and acrylic acid, a copolymer of vinyl acetate and butyl acrylate, a copolymer of vinyl acetate and edyl acrylate, a copolymer of edyl acrylate and 2-acrylamide, and the like.

The preferred average particle size of the polymer latex is 0.02 μm
-0.2 μm. The amount of polymer latex used is 0.0% by dry weight relative to the binder of the layer to which it is added.
03 to 0.5 is preferred.

The heat-developable photosensitive material of the present invention has various interfaces in the heat-developable photosensitive layer and/or non-photosensitive layer (e.g., undercoat layer, intermediate layer, protective layer, etc.) for the purpose of improving coating properties. Activators can be used.

The surfactant used in the present invention may be any of anionic, cationic, amphoteric and nonionic surfactants.

Examples of anionic surfactants include alkyl carbonylbenzene sulfonates, alkylnafculene sulfonates, alkyl rlXla esters, alkyl phosphates, N-acyl-N-alkyl taurines, and sulfosuccinates. , sulfoalkyl polyoxyethylene alkylphenyl ethers, polyoxyethylene argyrin esters, etc., carboxy groups, sulfo groups, phospho groups, sulfate ester groups, ′
Those containing an acidic group such as rA acid ester group are preferred.

Examples of cationic surfactants include alkylamine salts, aliphatic or aromatic quaternary ammonium salts,
Preferred are bicyclic quaternary ammonium salts such as pyridinium and imidazolium, and phosphonium or sulfonium salts containing aliphatic or heterocycles.

Preferred examples of the amphoteric surfactant include amino acids, aminoalkyl sulfonic acids, aminoalkyl sulfates or phosphoric esters, alkyl betaines, and amine oxides.

Examples of nonionic surfactants include saponin (steroid type), 11 alkylene oxides (for example, polyethylene glycol, polyethylene glycol/polypropylene glycol condensates, polyethylene glycol alkyl ethers or polyethylene glycol alkylaryl ethers, polyethylene glycol esters, Polynibrene gelicol sorbitan esters,
polyalkylene glycol alkylamines or amides, polyethylene oxide adducts of silicone),
Preferred are glycidol derivatives (eg, alkenylsuccinic acid polyglycerides, alkylphenol polyglycerides), fatty acid esters of polyhydric alcohols, alkyl esters of sugars, and the like.

The heat-developable photosensitive material of the present invention contains a hot mass @ photosensitive layer and/or a non-photosensitive layer (for example, an undercoat layer, an intermediate layer, layer,
(protective layer, etc.) may contain non-photosensitive silver halide grains.

The non-photosensitive halogen 1arsenic grains used in the present invention include silver chloride, silver bromide, 1R iodide, silver iodobromide, Jn silver bromide,
Any silver halide containing silver halide, such as silver chloroiodobromide, can be used. The preferred particle size of the non-photosensitive silver halide grains is about 0.3 μm or less.

Also, the amount added is 0.00% in terms of silver amount for the layer to be added.
The range of 02 to 3 (1/n' is preferable).

The heat-developable photosensitive material of the present invention includes a heat-developable photosensitive layer and/or a non-photosensitive layer (undercoat layer,
(intermediate layer, protective layer, etc.), for example, JP-A-51-10433.
It can contain a vinyl polymer having a carboxyl group or a sulfo group as described in 8@.

The amount of the vinyl polymer used is preferably in the range of 0.05 to 2.0 in terms of dry weight ratio to the binder of the layer to which it is added.

When the heat-developable photosensitive material of the present invention is a color type, a dye-providing substance is used.

Dye-providing substances that can be used in the present invention will be explained below. The dye-donating substance is one that participates in the j9-element reaction of photosensitive silver halide and/or Oboro silver salt used as necessary, and can form or release a diffusible dye as a function of the reaction. Depending on the reaction mode, a negative dye-donor that acts on a positive function (i.e., forms a negative dye image when negative-working silver halide is used) and a negative dye donor that acts on a negative function. It can be classified as a positive-acting dye-donor (i.e., it forms a positive dye image when a negative-working silver halide is used). Negative dye-donating substances are further classified as follows.

Release type compound Formation type compound proboscis The respective dye-donating substances will be further explained.

Examples of the reducible dye-releasing compounds include compounds represented by general formula (2).

General formula (2) % Formula % In the formula, Car is a 12-element compound that undergoes reduction of photosensitive silver halide and/' or a silver salt used as necessary, and is intermediated and releases a dye. (so-called chirelia), and Dye is a diffusible pigment residue.

Specific examples of the above-mentioned reducing dye-releasing compounds include JP-A-57-179840, JP-A-58-116537, and JP-A No. 58-116537.
'l-60434, 59-G5f1139,
No. 59-7104G, No. 59-87450, No. 5'
No. l-88730, No. 59-123837, No. 59i
2 in G5054, 59-165055 specification etc.
For example, the following 1"!A is given.

Margin book below e Q ~
=OC+aHss ■ 〇′′ θ [Phase] 1N (J.

■ @ ■ ■ Another reducing dye-releasing compound is, for example, general formula (3).
Examples include compounds represented by: .

General formula (3) represents a group or an amino group, and Dye has the same meaning as Dye shown in general formula (2). Specific examples of the above compounds are given in JP-A No. 5
No. 9-124329.

As a coupled dye-releasing compound, general formula (4) is used.
Examples include compounds represented by:

General formula (4) % formula % In the formula, C1] + is an organic group (so-called coupler residue) that can react with the oxidized form of the reducing agent to release a diffusible dye, and J is a divalent It is a bonding group, and the bond between C1+ and J is cleaved by reaction with the oxidized form of the reducing agent. n
l represents 0 or 1, and Dye has the same meaning as defined in general formula (2). In addition, CD+ is preferably substituted with various ballast groups in order to make the coupled dye-releasing compound non-diffusible, and the ballast group has 8 or more carbon atoms ( (more preferably 12 or more) right t1 groups, or hydrophilic groups such as sulfo groups and carboxy groups, or 8 or more (more preferably 12 or more) carbon atoms and hydrophilic groups such as sulfo groups and carboxy groups. It is a group having both. Another particularly preferred ballast group can include polymer chains.

Specific examples of the compound represented by the above general formula (4) include JP-A-57-186744 and JP-A-57-122596.
No. 57-160698, No. 59-174834, No. 57-224883, No. 59-159159,
No. 59-231540 Specification II Part 1, examples of which include the following compounds.

As a coupling dye-forming compound, -g2 formula (5
) are listed.

General formula (5) % formula %) In the formula, CF+2 is an organic group (so-called coupler residue) that can react with the oxidized form of the reducing agent (coupling reaction) to form a diffusible dye, and F represents a divalent bonding group, and B represents balas+-m.

The coupler residue represented by Cp2 preferably has a molecular weight of 700 or less for the sake of diffusibility of the dye formed.
More preferably it is 500 or less.

In addition, the ballast group is preferably the same as the ballast group defined in general formula (4), particularly 8 or more (preferably 12 or more) carbon atoms and a hydrophilic group such as a sulfo group or a carboxy group. A group in which both are the same is preferred, and a polymer chain is more preferred.

The coupled dye-forming compound having the polymer base is preferably a polymer having a repeating unit derived from the shell represented by the general formula (6).

General formula (6) % formula %) In the formula, Cp2 and F have the same meanings as defined in general formula (5), Y represents an alkylene group, an arylene group, or an aralkylene group, and ri represents O or 1. Representation, Z is 21
i [[i represents an organic group, and L represents an ethylenically unsaturated group or a group having an ethylenically unsaturated group.

- [The Wu regime of the coupled dye-forming compound represented by formulas (5) and (6) is disclosed in JP-A-59-1243.
No. 39, No. 59-181345, Go-2950, Patent Application No. 179657-1980, No. 59-181604
No. 59-1i112506, No. 59-18250
There are two precepts in each town, thin circle, etc. of No. 7, and examples include the following compounds.

The following margins illustrate dye-providing substances [phase] C, 8H3゜Polymer CH2COOH PM-3C
H3M-4 OH3 M-5 OH3 OH x: 60 heavy plate% y: 40 heavy plate% In the above general formulas (4), (5) and (6), Cp
More specifically, the coupler residue defined by 1 or CI)2 is preferably a group represented by the following general formula.

General formula (7) General formula (8) General formula (9) General formula (10) General formula (
11) General formula (12) General formula (1
3) General formula (14) General formula (15
) General formula (16) R'
0 In the formula, R7, R8, R9 and R1o are each a hydrogen atom, a halogen atom, an alkyl group, a cycloalkyl group, an aryl group, an acyl group, an alkyloxycarbonyl group, an aryloxycarbonyl group, an alkylsulfonylrubamoyl group, a sulfamoyl group , acyloxy group, amine group, alkoxy group, aryloxy group, cyano group,
It represents an alkylsulfonyl group, an arylsulfonyl group, a ureido group, an alkylthio group, an arylthio group, a carboxy group, a sulfo group, or a heterocyclic residue, and these can further include water, a carboxy group, a sulfo group, an alkoxy group, a cyano group, a nitro It may be substituted with a base, an alkyl group, an aryl group, an aryloxy group, an acyloxy group, an acyl group, a sulfamoyl group, a carbamoyl group, an imide group, a halogen atom, or the like.

These substituents are selected depending on the purpose of Cpl and CI)2, and as mentioned above, one of the substituents is preferably a ballast group in <Cl)1, and in CI)2, it is preferable that one of the substituents is a ballast group. In order to increase the diffusivity of
Hereinafter, the number of substituents is preferably selected to be 500 or less.

As a positive dye-donating substance, for example, the following general formula (
There is an oxidizable dye-releasing compound represented by 17).

General formula (17) In the formula, Wl represents a collection of atoms necessary to form a quinone ring (which may have a substituent on this ring),
R1 represents an alkyl group or a hydrogen atom, and R represents an oxygen atom or I2--N-. ) or -SO2-, r is 0
or 1, and Dye has the same meaning as defined in general formula (2). A specific example of this compound is JP-A-59-1
It is described in specifications such as No. 6G954 and No. 59-154445, and includes, for example, the following compounds.

The following general formula (18) is used as a positive dye-providing substance according to the margin below.
There are compounds that lose their dye-releasing ability when oxidized, such as the compound represented by:

General formula (18) In the formula, W2 represents a collection of atoms necessary to form a benzene ring (which may have a substituent on the ring), R,
r%E%Dye has the same meaning as defined in general formula (17). A specific example of this compound is JP-A-59-1243.
No. 27, No. 59-152440, etc., and include, for example, the following compounds.

Margin below Exemplary dye-donor substances ■ OCR.

Still another positive dye-providing substance is expressed by the following general formula (
Examples include compounds represented by 19).

General formula (19) In the above formula, W2, R'', Dyel;! - have the same meaning as defined in general formula 18).

Specific examples of this compound are described in JP-A-59-154445, etc., and include the following compounds.

In the margin below, exemplified dye-providing substances having general formulas (2), (3), (4), (17) (18)
) and (19), the residues of the diffusible dye represented by Dye will be briefly described in detail. As the residue of the diffusible dye, it is preferable that the number of molecules is 800 or less, more preferably 600 or less, for the sake of the diffusibility of the dye, and azo dye,
Examples include residues such as azomethine dyes, anthraquinone dyes, naphthoquinone dyes, styryl dyes, nitro dyes, quinoline dyes, carbonyl dyes, and phthalocyanine dyes.

These dye residues may be in a temporary short-waveform form that allows multiple colors during thermal development or transfer. In addition, these dye residues are used for the purpose of increasing the light resistance of both cases, for example, in
48765@ and No. 59-124337 is also a preferable form.

These dye-providing substances may be used alone or in combination of two or more. The amount used is not limited, and whether the dye donor H is used alone or in combination, or whether the photographic constituent layer of the light-sensitive material of the present invention is a single layer or a multilayer of two or more types. For example, it can be used in an amount of 0.005 to 50 g, preferably 0.10 to 10 g per use (y is 11).

The dye-providing substance used in the present invention is added to the photographic constituent layer of the heat-developable photosensitive material at 21'TI! How to tighten is 1. For example, after dissolving in a low-boiling temperature medium (methanol, ethanol, ethyl acetate, etc.) or a high-boiling point solvent (dibutyl chloride, tricresyl phosphate, etc.), the molecules are subjected to ultrasonic waves, or an alkaline aqueous solution is used. (for example, a 10% aqueous solution of sodium hydroxide) and then neutralized with (for example, warm W or 11 acid), or use an aqueous solution of the same polymer (for example, It can be used after being dispersed using a ball mill together with pyratine, polyvinyl butyral, polyvinylpyrrolidone, etc.).

The heat-developable photosensitive Ct material of the present invention is usually 80°C to 80°C after clear exposure.
At a humidity range of 200°C, preferably 100°C to 170'C, from 1 second to 180 seconds, preferably from 1.5 seconds to 12
The phenomenon occurs just by heating for 0 seconds. The transfer of the diffusible dye to the image-receiving layer may be carried out simultaneously with heat development by bringing the image-receiving member into close contact with the photosensitive surface of the photosensitive material and the image-receiving layer during heat development, or by bringing the image-receiving member into close contact with the image-receiving member and heating it after hot mass a. Alternatively, the transfer may be carried out by supplying water and then applying heat if necessary. Also, before exposure, 70℃~1
Preheating may be performed in a temperature range of 80°C. In addition, as described in Japanese Patent Application Laid-Open No. 60-143338 and Japanese Patent Application No. 60-3+344, the photosensitive material and image receiving member are heated at 80°C to 250°C immediately before thermal development transfer in order to improve their mutual adhesion.
Each may be preheated at a temperature of

Various exposure means can be used for the photothermographic material according to the present invention. The obscurity is obtained by imagewise exposure to radiation, including visible light. In general, light sources used for ordinary color printing, such as tungsten lamps, mercury lamps, xenon lamps, laser beams, and CRT light PiI@, can be used as the light source.

As the heating means, all methods applicable to ordinary thermal mass@photosensitive materials can be used, such as contacting with a heated block or plate, contacting with a heated roller or drum, or heating in a high temperature atmosphere. or by using high-frequency heating, or by providing a conductive material containing a conductive substance such as carbon black on the back surface of the photosensitive material of the present invention or on the image receiving member for thermal transfer, to reduce the joules generated by energization. Heat can also be used. There are no particular restrictions on the heating pattern, including methods of preheating (preheating) and then reheating, heating at a high temperature for a short time, or at a low temperature for a long time, continuously increasing, decreasing, or repeating, and even discontinuously. Although heating is possible,
A simple pattern is preferred. Alternatively, a method in which exposure and heating proceed simultaneously may be used.

[Effects of the Invention] In the present invention, a photosensitive material comprising a first support, a photosensitive layer and a non-photosensitive layer containing a polymer having sulfone iI% in the side chain, and a heat molten agent on another support. By thermally developing 1lIX using an image receiving member containing 1lIX, there is no film destruction due to heating, and the transfer form color photosensitive transfer (1 to 1 m (i!; Ta.

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

Example-1 [Preparation of silver iodobromide emulsion] At 50°C, JP-A No. 57-92523, No. 57-
Using the mixing agitation 11- shown in 92524 bow specification m,
Ossein Gelabun 20! ll, 1000y of distilled water (! and 11.G of potassium iodide in solution A in which ammonia was dissolved.
Water♂H500 containing O and 130g of potassium bromide
P, '11 of vff and 500 g of solution C containing 1 mol of silver nitrate and ammonia at the same time l) A! +
and I) H was added while keeping it constant. By roughly controlling the appropriateness of addition of liquid B and liquid C, a core with a silver iodide content of 7 L%, a regular hexahedron, and an average grain size of 0.25 μl can be obtained. A formulation L was prepared. Next, in the same manner as above, the silver iodide content was reduced to 1
By enclosing a shell of mol% silver halide, positive 6
Hedron, average grain size 0.3μ+n (IFF of shell,
A core/shell type silver halide emulsion with a diameter of 30.05 μm was prepared as II. (The monodispersity was 8%.) The emulsion was washed with water and desalted to obtain a yield of 700 d. Further, the silver halide obtained in [4] above was mixed with the following composition to prepare three red-sensitive silver halide emulsions (Kl 1).

a) Preparation of red-sensitive silver iodobromide emulsion The above silver iodobromide emulsion 700 v124
-Hydroxy-6-methyl-1゜3.3a,7-tetrazaindene 0.4kugelatin
32 g Sodium thiosulfate 10 mg The following sensitizing dye methanol 1% solution 801 g Distilled water
120 (h, e sensitizing dye (
a) b) Preparation of green-sensitive silver iodobromide emulsion Said silver iodobromide emulsion 700 d4-hydroxy-6-methyl-1°3.3a,7-tetrazaindene 0.4g gelatin
32 i) Sodium diosulfate 10mg 1% methanol solution of the following sensitizing dye 80. p distilled water
1200 Sensitizing dye (b) C) Preparation of blue-sensitive silver iodobromide emulsion Said silver iodobromide emulsion 700 Bo 4-Hydroxy-6-methyl-1°3.3a,7-tetrazaindene 0o49 Gelatin
320 Sodium Thiosulfate
10 mg of the following sensitizing dye methanol 1%'Fiao, g Distilled water 1200. Q-sensitizing dye (c) Dye-donor dispersion-1:! 4> Exemplary polymeric dye-donor substance (PM-7) 35.5 g, and the following hydroquinone compound 5.00 (l) were added to 200 mj of ethyl acetate.
2, alkanol rC (DuPont 1) 51i
t% aqueous solution 124d phenylcarbamoylated gelatin (
Mix with gelatin aqueous solution 7201.Q containing Rouslow Co., Type 17819P C) 30.5 (l) and disperse with an ultrasonic homogenizer, and after distilling off ethyl acetate, adjust to pH 5.
, 5 to 795 vfl.

Preparation of hydroquinone compound reducing agent dispersion> Exemplary reducing agent (R-11) 23.3G, the following development accelerator 1.10fJ, poly(N-vinylpyrrolidone) 14
．． 6 (1, dissolve 0.50 (l) of the following surfactant in water,
The pH was adjusted to 5.5 and the temperature was adjusted to 250 d.

Development accelerator CH2CH=CH2 Surfactant CH2COOCH2 (CFzCF2) nH (m, n=2
or 3) <Preparation of organic silver salt dispersion> 5-methylbenzotriazole silver obtained by reaction in a 5-methylbenzotriazole alcohol mixed solvent 28. 8! I+ and poly(N-
Vinylpyrrolidone) 16.0 ( ) was dispersed in an alumina ball mill and adjusted to pH 5.5 to give 200 d.

[Preparation of Exemplary Compound Polymer Dispersion] Exemplary Compound 2
120 ml of 01d% acetic acid ethyl solution and 64 mff of 5 mffi% aqueous solution of Alkanol XC (manufactured by DuPont)
i and phenylcarbamoylated gelatin 14. 4LJ
Immediately after mixing with 340 m fl of an aqueous gelatin solution containing gelatin, it is dispersed using an ultrasonic homogenizer, and ethyl acetate is distilled off to obtain a polymer dispersion having a total Q of 400 m tl.

Heat-developable photosensitive material-1, 1 layer> Organic silver salt dispersion 12.5%, blue-sensitive silver iodobromide emulsion 6.0
0, the dye-providing substance dispersion 39. a. Mix 12.5d of the above reducing agent dispersion, and add a hardener solution (tetra(vinylsulfonylmethyl)methane and taurine in a ratio of 1:1).
(Im ratio) and dissolved in a 1% aqueous solution of phenylcarbamoylated gelatin so that tetra(vinylsulfonylmethyl)methane becomes 3% M%. ) to 2
．． 5O-H6, polyethylene glycol 3 as a thermal solvent
After adding 3.42 g of 00 (manufactured by Kanto Kagaku (3)), 1.760/g of silver was added onto a photographic polyethylene terephthalate film with a thickness of 180 μm that was undercoated.
v', and then add thereon a polymer dispersion in which the carbamoylated gelatin 0.8(]/12 and the exemplified compounds shown in Table 1 are dispersed by the above method! A dry film made of the mixture A protective layer with a thickness of 1.2 μm was provided.

<Preparation of image receiving member-1> Polyvinyl chloride (n-i, io
After adding the hot solvent shown in Table 1 to a tetrahydrofuran solution of Wako Tsumugi (Wako Tsumugi), 12g of polyvinyl chloride was added.
/i'.

The heat-developable photosensitive material-1 was exposed to 1,600C, M, and S through a step wedge, and together with the image-receiving member-1, the photothermographic material-1 was heated at 150°C in a heat developing machine (Iberotsuba Module 277.3M). After 1 minute of thermal development, the photosensitive material and the image receiving member were quickly peeled off, and a magenta step wedge negative image was obtained on the image receiving member.

The degree of anti-rJJ depth of the obtained negative image was measured using a densitometer (PDA-65
, manufactured by Konishiroku Photo Industry +11) to measure the anti)I concentration,
The maximum and minimum density (fog) were measured.

The following method was adopted to express the improvement level of transfer density unevenness.

[) of the step wedge image obtained by the thermal phenomenon
The wax section (3 cm x 4 cm) is divided into 1 cm matrices (12 sections), and the concentration at the center point of each section is measured. -1).

These results are shown in Table-2.

Below is a margin table - 2 Explanation of the table〉 Evaluation criteria for film damage〇 - None at all △ - Slight cracks, bottle balls present
It can be seen that there is no film destruction during heating, and there is little unevenness in the transfer of the image-receiving layer.

Example-2 <Dye-donor dispersion liquid-2> Exemplary dye donor purchase (17) 30. og to tricresyl phosphate 30.0 (l and ethyl acetate 90.0-me
It was mixed with gelatin aqueous solution 4GOn (2) containing a surfactant, the same as in Example 2, and dispersed with an ultrasonic homogenizer, then ethyl acetate was distilled off, and water was added to give a solution of 50
It was set to 0mp.

<Preparation of heat-developable photosensitive material-2> Blue-sensitive silver iodobromide emulsion 40.0d, organic silver salt dispersion 2
5. (h12, 50.0. of dye-providing substance dispersion-2,
ρ Add various water-based radex (20% solution) shown in Table 3 and mix, and use as a hot solvent 3.50 g of polyethylene glycol 300 (manufactured by Kanto Kagaku Bond), 1-phenyl-4,4'-dimethyl -3-pyrazolidone 10
1.511 g of 5% methanol solution 3.00 d of the same hardener as in Example-1 and 10 d of guanidine trichloro@acid
Weight Q% water-alcohol solution 20.0. g on a 180 μm thick photographic polyethylene terephthalate film that has been subbed. ? Q is 2.50(1,',
2. Apply as desired.

Furthermore, on top of that, 0.8 ml of M carbamoylated gelatin/
nt and a mixture of the exemplified compounds shown in Table 3, prepared in the same manner as Practical Example 3, with a dry film thickness of 1.2 μm.
A protective layer of m was provided.

Preparation of protective member-2> The following layers were sequentially coated on a transparent polyethylene terephthalate film having a thickness of 100 μm.

(1) Ho! F7i (7
,00 (1/v') (2) A layer consisting of cellulose acetate (4,00 (J/m')) (3) Styrene and N-benzyl-N,N-dimethyl-N-(3-maleimidopropyl) ammonium A layer consisting of a 1:1 copolymer of chloride, gelatin, and the heat solvent shown in Table 3 (Copolymer 3
．． 00(1/v', latin3.OOO/de)(4
) Layer consisting of urea and polyvinyl alcohol (saponification degree 98%) (urea 4.00/m', polyvinyl alcohol 3.0 g/v2) Give exposure of M and S, and combine with the passive member-2 in a tragic situation & machine.
After thermal development at 150"C for 1 minute, the receiver member 2 was immediately peeled off. The transmission density of the yellow transparent image obtained on the surface of the image receiver member was measured using a densitometer (PDA-65, Konishiroku Photo Industry). (manufactured by No. 4), and the maximum density, minimum density (fog), and transfer unevenness were measured in the same manner as in Example 1. The results are shown in Table 4.

Explanation of Table 4 below: Evaluation criteria for film damage〇 - None at all Δ - Slight cracks, pinholes containing the polymer of the present invention in the protective layer of
For samples containing thermal solvent in the image-receiving member, film destruction during heating is improved and image reception is possible! It can be seen that the unevenness of the transfer C degree of Δ is also small.

Example 3 A photosensitive layer t, f)1 having m layers was prepared with the configuration shown in Table 5, and the protective layer contained exemplified compounds not shown in Table 6, which were prepared in the same manner as in Example 1. was added.

These transfer-type heat-developable photosensitive materials were exposed and thermally developed in the same manner as in Example 1, and the reflection densities of both stages obtained were measured, and the unevenness of the transfer density was also measured and the results are presented. -7.

The following margin color turbidity prevention agent 5C-1 CH3 ■ X/y=3/2 (weight ratio) Y-filter dye F-1 H3 Border fX! It can be seen that in the sample in which the polymer of the present invention is contained in the photosensitive 0-portion protective layer and the thermal solvent is contained in the image receiving member, film destruction during heating is improved and transfer density unevenness of the received image is also improved.

Patent applicant: Konishi Rokushahei Industries Co., Ltd. Procedural amendment written instructions March 20, 1986

Claims (1)

[Claims] A heat-developable photosensitive element having a photographic constituent layer consisting of at least one heat-developable photosensitive layer and at least one non-photosensitive layer on a first support;
In a transfer type heat-developable color photosensitive material comprising an image-receiving element having an image-receiving layer, the side opposite to the first support of the heat-developable photosensitive layer furthest from the first support of the heat-developable photosensitive element. at least one non-photosensitive protective layer, at least one of the non-photosensitive protective layers contains a polymer having a sulfonic acid group in a side chain, and the image receiving element contains a thermal solvent. A transfer-type heat-developable color photosensitive material.