JPH0329947A - Heat developable color photosensitive material - Google Patents

Abstract

PURPOSE:To obtain color images having a high density without entailing an increase in fogging and to provide a high sensitivity and excellent preservable property by incorporating specific compd. into a photosensitive layer. CONSTITUTION:The heat developable color photosensitive material having the photosensitive layer contg. at least a photosensitive silver halide, binder, dye donative material, and reducing agent on a base contains the compd. expressed by formula I and the compd. expressed by formula II in the photosensitive layer. In the formula I, A denotes a residual coupler group; B denotes a bivalent bond group; one coupler is combined with the active point of the residual coupler expressed by A. C denotes a development accelerating photographic group; B denotes a ballast group. In the formula II, X<1> denotes the residual group of a development restrainer; L<1> denotes a mere coupler or bivalent group; D denotes a ballast group or a group having a hydrophilic group. The color images having the high density are obtd. with a low amt. of silver in this way without entailing an increase in the fogging. The heat developable color photosensitive material having the high sensitivity and the excellent preservable property is obtd. in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heat-developable color photosensitive material. In particular, the present invention relates to a heat-developable color photosensitive material that has high sensitivity, high density, and low power blur (minimum density).

[Background of the invention]

In recent years, attempts have been made to develop heat-developable color photosensitive materials that produce color images using various dye-providing substances. Among these, a method (hereinafter referred to as a transfer method) in which a color image is obtained by releasing or emitting a diffusible dye by heat development and then transferring the dye is a transfer method.
Although it requires an image receptor for image processing, it is superior in terms of image stability and clarity, and processing simplicity and speed. Note that the heat-developable photosensitive material referred to in the present invention includes a photosensitive material to be combined with an image receiving member when using a transfer method. The heat-developable color photosensitive material and image form of this transfer method are disclosed in, for example, JP-A-59-12431 and JP-A-59-1.
No. 59159, No. 59-181345, No. 59-22
No. 9556, No. 60-2950, No. 61-52643
No. 61-61158, No. 61-61157, No. 59-180550, No. 61-132952, No. 6
1-139842, U.S. Patent No. 4,595,
No. 652, No. 4,590, No. 154 and No. 4,584
, No. 267, each specification, etc.

However, the above-mentioned heat-developable photosensitive materials have insufficient silver developability and require the use of a large amount of silver to obtain the required density, or require long-term development or high-temperature development. However, such a method has the disadvantage that fog increases as the density increases.

As a means for promoting silver development, for example, JP-A-61
It is known that the development accelerator described in Japanese Patent No. 236548 and No. 61-72233 is incorporated into a photothermographic material, but even with such methods, fog increases as the maximum density increases. do.

In order to improve the conventional technology as mentioned above,
JP-A-61-159642 discloses a specific compound (
A method using a photothermographic abrasive material containing a compound that releases a development accelerator represented by the general formula (1) described later is described. However, although this technique accelerates development, it has low sensitivity and tends to increase fog during storage, so it does not completely solve the problem.

[Purpose of the invention]

The present invention has been made in view of the above points, and an object of the present invention is to obtain a color image with high density with a low amount of silver without increasing fog, and with high sensitivity and long shelf life. An object of the present invention is to provide an excellent heat-developable color photosensitive material.

[Structure of the invention]

The object of the present invention is to provide a heat-developable color photosensitive material having, on a support, a photosensitive layer containing at least a photosensitive silver halide, a binder, a dye-donating substance, and a reducing agent. A compound represented by formula (1),
This can be achieved by a heat-developable color photosensitive material characterized by containing a compound represented by the following general formula (2).

General formula (1) A-{B +VC In the formula, A represents a coupler residue, B is a divalent bonding group, and one bond is bonded to the active site of the coupler residue represented by A. . C represents a development accelerating group, and B represents a halastic group.

General formula (2) It represents a group having a hydrophilic group.

As described above, the present invention achieves the object of the present invention by containing the compound represented by the general formula (1) and the compound represented by the general formula (2) in the photosensitive layer. However, this was done based on the discovery that the above structure met the purpose of the present invention from among countless combinations in a huge group of compounds, and it was determined that such a combination is effective. This was unexpected even for the inventors.

The present invention will be explained in more detail below.

In the above general formula, A represents a coupler residue, and as a coupler residue represented by A, for example, the following general formula (
Examples include groups represented by 3) to (12).

The remainder (ff .+ General formula (3) General formula (4) General formula (9) General formula (10) General formula (5) General formula (6) General formula (11) General formula (12) General formula (7 ) General formula (8) In the formula, R', R2, R3 and R4 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, and an alkyl group. Sulfonyl group, arylsulfonyl group, carbamoyl group, sulfamoyl group, acyloxy group, amono group, alkoxy group, aryloxy group, cyano group, ureido group, alkylthio group, arylthio group, carpoxy group, sulfo group or heterocyclic residue represents a hydroxyl group, a carboxy group, a sulfo group, an alkoxy group, a cyano group, a nito group, an alkyl group, an aryl group, an aryloxy group, an acyloxy group,
It may be substituted with an acyl group, sulfamoyl group, carbamoyl group, imide group, halogen atom, or the like. Furthermore, one of these substituents (R', R'', R'' and R') is a compound of the development accelerator-releasing compound represented by the general formula (1) (hereinafter referred to as the compound of the present invention as appropriate). It is preferable that it is substituted with various halaste groups to improve immobility,
The ballast group may be a group having 8 or more carbon atoms (more preferably 12 or more) and a hydrophilic group such as a sulfo group or a carboxy group, depending on the form of the photosensitive material used; Mention may be made of polymer chains.

In the general formula (1), B represents a divalent bonding group, and the divalent bonding group represented by B includes S , 0
, NIICO , NIISO2-,
Examples include SO2NIINH-, -QC(1-, -SCO2, etc.).

In the general formula (1), C represents a development accelerator residue, and the development accelerator residue represented by C may be a compound that adsorbs or dissolves silver ions, or a compound that reacts with silver ions ( The residue of a compound that undergoes redox reaction) is preferred, and a group containing a nitrogen-containing heterocycle is particularly preferred. In addition, the solubility product (pKsp) of the silver salt of these development accelerator compounds C-H (C represents a development accelerator residue, I] represents hydrogen) in water at 25°C is It is a compound of 10 or more and does not contain a sulfo or carboxy group. The molecular weight of these development accelerator compounds is preferably 300 or less, more preferably 250 or less.
It is as follows. Examples include groups represented by the following general formula.

General formula (13) General formula (14) General formula (
15) General formula (16) General formula (23) General formula (24) p6 General formula (17) General formula (18) Oj General formula (25) General formula (26) R” General formula (19) General formula (20 ) General formula (27) General formula (28) General formula (21) General formula (22) General formula (29) General formula (30) 11 l2 In the above general formulas (13) to (30), D is an oxygen atom or R5, R6 and R7 each represent a hydrogen atom, a halogen atom, an alkyl group, an aralkyl group, an alkenyl group, an aryl group, an acyl group, an alkoxy group, an alkylthio group, an aryloxy group, a nitro group, a carboxy group, Represents a sulfo group, an alkoxycarbonyl group, a carbamoyl group, or a sulfamoyl group, and these groups can further include an alkyl group, an aryl group, an alkoxy group, a hydroxyl group,
It may be substituted with a carboxy group, sulfo group, cyano group, acyl group, carbamoyl group, or sulfamoyl group.

In addition, when R5 and R6 are adjacent, they are bonded to each other to form a ring (e.g. aromatic, carbocyclic, aliphatic carbocyclic, 'heterocyclic)
may be formed. Particularly preferred are compounds represented by general formulas (13) and (19).

Other examples of development accelerator residues include p-phenylenediamine, p-acunophenol, hydroquinone, 1-
It is a residue of a compound having reducing properties such as phenyl-3-virazolidinone, ascorbic acid, hydrazine, hydrazide, and hydrazine.

The amount of the compound represented by the general formula (+) to be added is 0.00 to 1 mole of the dye-providing substance. 005 mol to 1 mol (more preferably 0.05 to 0.5 mol).

The compound represented by the general formula (1) reacts with an oxidized form of a reducing agent that is necessary for image-wise when image-wise exposing a photothermographic material and performing heat development, thereby forming a development accelerator in an image-wise manner. emit.

Therefore, development is promoted image-wise, and sensitivity and image density are increased without increasing fog.

Typical specific examples of the compound of the present invention represented by general formula (1) are shown below. However, it is not limited to the following examples.

(A-1) 19 14 (A 2) (A 5) and copolymer of methyl methacrylate (A 3) composition ratio 5:5 (A 6) (A 4) and copolymer composition of butyl acrylate and copolymer of butyl acrylate Ratio 5: 5 set ratio (weight ratio, hereinafter, set ratio indicates weight ratio) 6: 4 I 5 1 6 (A 7) (A 10) C113 SO2N (Cztls) z (A 9) SO. I+ 0 I] (A 12) 1 7 1 8 (A 13) (A 15) Cobolimer of butyl acrylate and cobolimer of butyl acrylate Pairing ratio 7:3 Pairing ratio 6:4 (A16) ( Copolymer of copolymer of A14) and butyl methacrylate and butyl acrylate Pair ratio 5:5 Pair ratio 5:5 l9 20 (A17) (A19) Copolymer of butyl acrylate and butyl acrylate Cobolimer composition ratio 7:3 Copolymer composition ratio 5:5 (A 1B) (A 20) Copolymer composition of butyl acrylate and ethyl acrylate 6:4 Copolymer composition ratio 6:4 21 22 (A 21 ) (A 24) (A 25) and butyl acrylate cobolimer combination ratio 7: 3 (A 26) C113 (A 23) 23 24 (A 27) (A 30) (A 31) (A 29) Next The compound represented by the general formula (2) used in the present invention (hereinafter appropriately referred to as "F the inhibitor of the present invention") will be explained.

The residue of the development inhibitor represented by ``The Chemistry of Photography'' (written by Akira Sasai, published by Shashin Kogyo Publishing), pages 168-169, or ``The Theory of Photographic Process I'' (edited by T.I. + James, published by Mack Danran). It is a residue of an organic compound known as an inhibitor (or antifoggant) in conventional silver halide photographic photosensitive + J materials as described on pages 396 to 399, and is preferably heated at 25°C. is a residue of an organic compound whose solubility product (pKsp) of the silver salt of the compound in water is 10 or more.

Preferred examples when the x1 residue in the general formula (2) is a compound represented by X'H are represented by the following general formulas (32) to
(47).

General formula (32) represents a metal atom, ammonium group or organic amine residue. ] General formula (33) SM [♂C\NN ■ R8 [R8 represents a hydrogen atom, an alkyl group, or an aryl group, and M has the same meaning as M in general formula (32). ] [Rfi is a hydrogen atom, an alkyl group, an aryl group, or R 9- C =
N [R8 and R9 each represent a hydrogen atom, an alkyl group, or an aryl group, and M represents a hydrogen atom or an alkali group. ), R8 and R9 each represent a hydrogen atom, an alkyl group, an aryl group, or a 21-group, and Re and R9 may be combined to form a 5- or 6-membered ring. ] General formula (37) (R8 represents a hydrogen atom, an alkyl group, or an aryl group, R9 and RIG each represent a hydrogen atom, an alkyl group, or an aryl group, and R2 and R3 combine to form a 5- or 6-membered ring. ], RI represents -SM (M is the same as M in general 2 (32)), a thiol residue or -N
H-R'(R' is a hydrogen atom, an alkyl group, or an aryl group), R6 and R9 each represent a hydrogen atom, an alkyl group, an aryl group, or a ditro group, and RO and R9 combine to form a 5-membered or A six-membered ring may be used as a precept.

+<” represents a hydrogen atom, an alkyl group, or an aryl group, and M has the same meaning as M in general formula (32).] [R8 and R9 represent a hydrogen atom, an alkyl group, an aryl group, or a halogen atom, and R8 and R9 may stick together to form a 5- or 6-membered ring.]30 General formula (39) Re8!{ (Rll, R9 and R10 are each a hydrogen atom, an alkyl group, an atom group, alkoxy group, alkylthio group having 1 to 7 carbon atoms, or -SM (M is M of general formula (32)
is synonymous with )] (R8R9, R" and R" each have the same meaning as R8 to R1 in general formula (40).) General formula (42) 1l [R8 and R9 each represent a hydrogen atom or an alkyl group, M is synonymous with M in general formula (32).](Re, R
9, Rl0, Rl+ and RI2 are each a hydrogen atom, an alkyl group, an aryl group, NH RI3 (RI3 represents a hydrogen atom, an alkyl group or an aryl group), SM (M
has the same meaning as M in general formula (32). ), represents an alkylthio group or an alkoxy group. )]11 S (Re and R9 each represent a hydrogen atom, an alkyl group, or an aryl group, and R8 and R9 may combine to form a 5- or 6-membered ring.)]31 32 RIG (R8, R9 and RIO each represent a hydrogen atom, an alkyl group, or an aryl group, and R8 and R9 may be combined to form a 5- or 6-membered ring.Y has the same meaning.] General formula (46) R8 I (Rll and R9 each represent a hydrogen atom, an acyl group, an alkyl group, or an aryl group, and R' and R2 combine to form 5
or a six-membered ring.

Or represents an alkyl group. ) represents. ] represents an alkyl group. ), M has the same meaning as M in general formula (32). ] (R B represents a hydrogen atom, an amino group, an alkyl group, or an aryl group, and Y is -O-, -S- or Y8 Rlo (R B , R 9 and R" are R of general formula (44)
It is synonymous with 8 to RIG, and ye represents a counter anion. ] In the general formulas (32) to (47), the preferable photographic inhibitor 33 residue is an -SM group (M is a hydrogen atom, an alkali metal atom,
Represents an ammonium group or an organic amine residue. ) is a residue of a nitrogen-containing heterocycle having the general formula (33) or (
Particularly preferred are photographic inhibitor residues represented by 37).

The divalent group represented by I and 1 in the general formula (2) is preferably an alkylene group having 1 to 7 carbon atoms (e.g., methylene group, ethylene group, propylene group, etc.), alkenylene group (e.g., vinylene group, etc.). group, propenylene group), arylene group (e.g., p-phenylene group, m-phenylene group, 0-phenylene group, igono group, carbonyl group, sulfonyl group, ether group, or a combination thereof (
For example, alkylene group, aralkylene amino group, sulfonylamino group, etc.) can be mentioned, and more specifically, the following can be mentioned.

CONII − −SO2Nl−1−, −NIIC
ONI+-, -COO〇1 -S- -NR- (
R is a hydrogen atom or an alkyl group) and -C○-.

As the Halas 1 group represented by B in the general formula (2) of the present invention, during heat development, a compound represented by the general formula (2) of the present invention and its silver salt (also a silver salt) It is an organic hallast group that has a molecular size and shape that reduces the diffusivity of −
1 long-chain alkyl groups bonded via the divalent bonding group represented by 1 and Hensen-based and naphthalene fused directly or indirectly to the carbocyclic nucleus or heterocyclic nucleus of the inhibitor residue, etc. This includes the aromatic groups of the system. Effective halastic groups generally have at least 8 carbon atoms, more preferably 8 to 40 carbon atoms (
When it has a substituent, it includes the carbon atom of the substituent. )
(including those having substituents).

In addition, groups having a group substituted with a hydrophilic group such as a sulfo group or a carboxyl group, and having an alkyl group having 8 to 30 carbon atoms (including those having substituents) are also effective halas. It is 14.

Preferred specific examples of the Halas 1 group used in the present invention are shown below.

CI71135. CISl+31,
-C+oH.

? Il■CIl-C, +19. ■ Czlls ? C11 ■) 30 (CI12) 7CII: l . 38 39 41 The following general formula (2) Representative of compounds represented by I will show you a specific example, but The present invention is limited to these It's not a thing.

(B 2) 40 (B 6) (B 8) 42 ■ (B 11) ]I 43 (B 16) (B 17) (B 19) 45 (B 12) (B 20) (B 21) 44 qH 01 { 46 (B 28) (B 29) 48 The amount of the compound represented by the general formula (2) according to the present invention is not limited, and depends on the type of the compound and whether it is used alone or in combination of two or more. It may be determined depending on the type, amount, mixing ratio, etc. of the photosensitive silver halide and organic silver salt used, but generally 10-5 to 10-' mol per 1 mol of photosensitive silver halide is used. Preferably, it is more preferably 10-4 to 10-2 mol.

The compound represented by the general formula (2) according to the present invention is contained in a photosensitive layer in a photosensitive material, but when the photosensitive layer has a multilayer structure, it can be contained in any layer. . Any method can be used for addition, such as low boiling point solvents (methanol, ethanol, ethyl acetate, etc.) or high boiling point solvents (dibutyl phthalate-1, dioctyl phthalate-1, etc.).
Tricresyl phosphate, etc.), then dispersed by ultrasonic waves, or dissolved in an alkaline aqueous solution (e.g., 10% sodium hydroxide solution, etc.), and then neutralized with mineral acid (e.g., hydrochloric acid or nitric acid, etc.). Alternatively, the ball can be used after being dispersed with an aqueous solution of a suitable polymer (eg, polyvinyl butyral, polyvinylpyrrolidone, etc.).

Examples of dye-providing substances that can be used in the heat-developable color photosensitive material of the present invention include non-diffusible dyes described in JP-A-62-44737, JP-A-62-129852, and JP-A-62-169158. For example, the leuco dye described in U.S. Pat. No. 475,441 or the ab dye used in the heat-developable dye bleaching method described in U.S. Pat. No. 4,235,957 can also be used as the dye-donor substance. but more preferably forms a diffusible dye or h9. It is preferable to use a diffusible dye-providing substance that produces a diffusible dye, and it is particularly preferable to use a compound that forms a diffusible dye by a cassopring reaction.

Diffusible dye-providing substances that can be used in the present invention will be explained below. The diffusible dye-donor is one that is capable of forming or releasing a diffusible dye as a function of the reduction reaction of the photosensitive silver halide and/or the organic silver salt used if necessary. Depending on their reaction form, they can be classified into negative-type dye-donating substances and positive-type dye-donating substances.

51 51-2 Negative dye-donating substances include, for example, U.S. Pat.
No. 63.079, No. 4,439.513, JP-A-59
-60434, 59-65839, 59-71
No. 046, No. 59-87450, No. 59-88730
Examples include reducible dye-releasing compounds described in the specifications of No. 59-123837, No. 59-124329, No. 59-165054, and No. 59-164055.

Other negative dye-providing substances include, for example, U.S. Pat.
, No. 474,867, JP-A-59-12431, No. 5
No. 9-48765, No. 59-174834, No. 59-
No. 776642, No. 59159159, No. 59-23
Examples include casopring dye-releasing compounds described in specifications such as No. 1040.

Another particularly preferred negative-tone dye-providing substance of the coupling dye-forming compound is one represented by the following general formula (a).

General formula (a) represents an organic group (coupler residue) that can form a diffusible dye through C p (J-to-1 → B) reaction, and J is an oxidized form of a reducing agent. B represents a divalent bonding group bonded to an active position that reacts with B, and B represents a ballast group. Here, the halaste group is a group that substantially prevents the dye-providing substance from diffusing during heat development processing, and includes groups (such as sulfo groups) that exhibit this effect depending on the nature of the molecule, and groups that exhibit this effect depending on their size. Groups (such as groups with a large number of carbon atoms), etc. The coupler residue represented by Cp preferably has a molecular weight of 700 or less, more preferably 500 or less, in order to improve the diffusibility of the dye.

The ballast group is preferably a group having 8 or more carbon atoms, more preferably 12 or more carbon atoms, and more preferably a group having a polymer chain.

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

In the formula, Cp reacts with the oxidized form of the reducing agent (Cupli general formula (
mouth) Cp →, J-) → Y+-7V (in the Betsuichi (L) formula, cp,
J has the same meaning as defined in general formula (a), Y represents an alkylene group, arylene group or aralkylene group, l represents O or 1, Z represents a divalent organic group,
L represents an ethylenically unsaturated group or a group having an ethylenically unsaturated group.

Specific examples of coupled dye forms or compounds represented by the general formulas (A) and (2) include JP-A No. 59-124339.
No. 59-181345, No. 60-2950, No. 6157943, No. 61-59336, etc.,
U.S. Patent Nos. 4,631,251 and 4,650,748
No. 4,656,124, particularly U.S. Pat. No. 4,656,124,
U.S. Patent No. 4,63L251, U.S. Patent No. 4,650,748
The polymeric dye-providing substances described in each specification are preferred.

As a positive type dye-donating substance, for example, JP-A-59-
No. 55430, No. 59-165054, No. 59-15
No. 4445, No. 59-766954, No. 59-116
No. 655, No. 59-124327, No. 59-1524
Examples include compounds described in publications such as No. 40.

These dye-providing substances may be used alone or in combination of two or more kinds. The amount used is not limited, and depends on the type of dye-providing substance, whether it is used alone or in combination, or whether the photographic structure or layer of the light-sensitive material of the present invention is a single layer or a multilayer of two or more. For example, the amount to be used is 0.005 to 50 g per portion, preferably 0.00 g per portion, although it may be determined accordingly.
It can be used in an amount of 1 g to 10 g.

The dye-providing substance used in the present invention can be incorporated into the photographic structure or layer of the heat-developable light-sensitive material using any method. phthalate, 1 to licresyl phosphate, etc.), and then emulsified and dispersed, or dissolved in an alkaline aqueous solution (e.g.,
After dissolving in an acid (10% aqueous solution of sodium hydroxide, etc.),
For example, use 5 after neutralizing with citric acid or nitric acid, etc.
4 55 or an aqueous solution of a suitable polymer (e.g. gelatin, polyvinyl butyral, polyvinylpyrrolidone, etc.)
It can be used after solid dispersion.

Next, the photosensitive silver halide used in the present invention will be described. Any silver halide can be used, and examples thereof include silver chloride, silver bromide, silver iodide, silver chlorobromide, silver chloroiodide, and silver iodobromide. The photosensitive silver halide can be prepared by any method commonly used in the photographic art.

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

In addition, the shape of photosensitive silver halide is cubic, spherical, 8
It is possible to use materials that have a clear crystal habit, such as a hedron, a dihedron, and a tetradecahedron, or those that do not. This type of silver halide is described in JP-A-60-215948.

Also, for example, JP-A-58-111933, JP-A No. 58-1
No. 11934, No. 58-108526, Research Disclosure No. 22534, etc., each of which has two parallel crystal planes, and each of these crystal planes is smaller than the other single crystal of this particle. It is also a tabular halogen, which is a particle with a large area and whose aspect ratio, that is, the ratio of the particle diameter to thickness, is 5=1 or more. Silver halide emulsions containing silver halide grains can also be used.

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. Regarding the internal latent image type halogenated resin whose surface is not fogged in advance, for example, U.S. Pat.
, No. 592,250, No. 3,206,313, No. 3,
No. 317,322, No. 3,511,622, No. 3, 4
No. 47,927, No. 3,761,266, No. 3,70
It is described in each specification such as No. 3,584 and No. 3,736,140.

Internal latent image type silver halide grains whose surfaces have not been fogged in advance are halogenated grains in which the sensitivity inside the grain is higher than the sensitivity on the surface of the silver halide grain, as described in the above specifications. They are silver particles. Also, U.S. Patent No. 3,
No. 271,157, No. 3,447,927, and No. 3,53L291, silver halide emulsions having silver halide grains containing polyvalent metal ions, or U.S. Pat. , 761,276, or a silver halide emulsion in which the grain surface of silver halide grains containing a dopant is weakly chemically sensitized, or JP-A-5
Silver halide emulsions comprising grains having a layered structure as described in publications such as No. 0-8524 and No. 50-38525, and other publications such as JP-A-52-156614 and JP-A-5
Silver halide emulsions described in No. 5-127549 can be used.

The silver halide in the above-mentioned photosensitive emulsion may have coarse or fine grains, but the preferred grain size is about 0.005 μm to about 1.5 μm, more preferably about 0.005 μm to about 1.5 μm. ．． OI μm to 0.5 μm.

In the present invention, as another method for preparing photosensitive silver halide, a photosensitive silver salt form rIi component is allowed to coexist with an organic silver salt described below, and a part of the organic silver salt is formed with photosensitive silver halide. You can also do that.

These photosensitive silver halides and photosensitive radical salts can be used in combination in various ways, and the amount used is preferably 0.001 g to 50 g per layer per 1 d of support. More preferably, it is 0.1 to 10 g.

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

Further, the photosensitive silver halide emulsion used can be spectral sensitized using a known spectral sensitizing dye to impart sensitivity to blue, green, red, and near-infrared light.

Typical spectral sensitizing dyes that can be used include, for example, cyanine, merocyanine, complex (that is, trinuclear or tetranuclear) cyanine, holoboracyanine,
Examples include styryl, hexyanine, oxonol, and the like.

The preferred amount of these sensitizing dyes to be added is from 6 to 1 mole of IXIO-58 per mole of photosensitive silver halide or silver halide form or fraction. More preferably, it is IXIO-' to IXIO-'mol.

The sensitizing dye may be added at any stage of the preparation of the silver halide emulsion. That is, it may be carried out at any time, such as during silver halide grain formation, removal of soluble salts, before chemical sensitization, during chemical sensitization, or after chemical sensitization.

In the heat-developable photosensitive material of the present invention, it is preferable to use various organic silver salts, if necessary, for the purpose of increasing sensitivity and improving developability.

Examples of organic silver salts that can be used in the heat-developable photosensitive material of the present invention include JP-A Nos. 53-4921 and 49-5262.
No. 6, No. 52-141222, No. 53-36224, No. 53-37626, and No. 53-37610, as well as U.S. Patent No. 3,330,633, No. 3,794,496, Silver salts of long-chain aliphatic carboxylic acids and silver salts of carboxylic acids having heterocycles, such as silver behenate, enyltetrazolthio〉silver acetate, etc., Japanese Patent Publication No. 44-26582, No. 45-12
No. 700, No. 45-18416, No. 45-22185
No., JP-A-52-137321, JP-A No. 58-1186
No. 38, No. 58-118639, U.S. Patent No. 4,12
There are silver salts of imino groups described in various publications such as No. 3,274.

Among the above organic silver salts, imino group salts are preferred;
In particular, silver salts of henzotriazole derivatives, more preferably 5-methylbenzo-1-lyazole and its B'lr'
2 bodies, sulfobenzo 1 lyazole and its Mm body, N
-Anolenitonoresnorefaminoolebenzoyl riazoles and derivatives thereof are preferred.

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

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

The heat-developable color photosensitive material of the present invention has a reducing agent (in this specification, reducing agent precursors are also included in the reducing agent). As the reducing agent, those commonly used in the field of photothermographic materials can be used.

Examples of reducing agents that can be used in the present invention include U.S. Pat. Nos. 3,531,286 and 3,761,27.
No. 0, the specifications of No. 3,764,328, and RD (
Research Disclosure) 11hl2146, 11kll5108, 15127 on the same floor, and JP-A-1986-
No. 27132, U.S. Pat. No. 3,342,599, U.S. Pat. No. 3,719,492, and JP-A-1988-1
35628 and 57-79035, p-phenylenedia ξ-based and p-aminophenol-based developing agents, phosphatamide phenol-based, sulfonamide aniline-based developing agents, and human'razone-based color developers. Main drugs and their precursors, or phenols, sulfonamidophenols, polyhydroxyhensens, naphthols, hydroxybinaphthyls, methylenebisnaphthols, methylenebisphenols, ascorbic acid, 3-virazolidones, and pyrazolones. Can be used.

Further, the dye-donating substance may also serve as a reducing agent.

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

Two or more types of reducing agents may be used simultaneously.

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

The compounds that can be used in the heat-developable photosensitive material of the present invention include polyvinyl petyral, polyvinyl acetate,
Ethylcellulose, polymethylmethacrylate, cellulose acetate butyrate, polyvinyl alcohol, polyvinylpyrrolidone, gelatin,
Examples include gelatin derivatives such as phthalated gelatin, cellulose derivatives, proteins, starch, synthetic or natural polymeric substances such as gum arabic, and these may be used alone or in combination of two or more. In particular, it is preferable to use gelatin or a derivative thereof together with a hydrophilic polymer such as polyvinylpyrrolidone or polyvinyl alcohol, and more preferably gelatin and polyvinylpyrrolidone as described in JP-A-59-229556. Using a mixed binder.

The preferred amount of binder used is usually 0.05 g to 50 g per 1 support, more preferably 0.2 g to 50 g.
It is 20g.

In addition, the binder is 0.1% per 1g of the dye-providing substance.
It is preferable to use ~10g, more preferably 0.2
~5g.

The heat-developable photosensitive material of the present invention can be obtained by forming a photographic layer on a support, and examples of the support that can be used here include polyethylene film, cellulose acetate film, and polyethylene terephthalate film. , a paper support such as a polyvinyl chloride film, a photographic base paper, a printing paper, a baryta paper, and a resin coated paper; Examples include hardened supports.

In the heat-developable photosensitive material of the present invention, and when the photosensitive material is of a transfer type and uses an image-receiving member, it is preferable that various thermal solvents are added to the heat-developable photosensitive material and/or the image-receiving member.

The thermal solvent is a compound that is liquid during thermal development and promotes thermal development and/or thermal transfer. These compounds include, for example, U.S. Pat.
, No. 667,959, (RD Research Disclosure) Sue. 17643 (X II), Japanese Patent Application Publication No. 1983-
No. 229556, No. 59-68730, No. 59-84
No. 236, No. 60-191251, No. 60-2325
No. 47, No. 60-14241, No. 61-52643, No. 62-78554, No. 62-42153, No. 6
No. 2-44737, etc., U.S. Patent No. 3,438.
No. 776, 3. No. 666477, 3,667,
Specifications of No. 959, JP-A-51-19525, JP-A No. 53
-24829, 53-60223, 58-11
Examples of organic compounds having polarity such as those described in Japanese Patent No. 8640 and No. 58-198038 include urea derivatives (e.g. dimethylurea, dico nitinoleurea, phenynoleurea, etc.), amide B conductors (e.g., acetate, henzene, p-toluamide, etc.), sulfonamide derivatives (e.g., henzenesulfonamide, α
-toluenesulfonamide, etc.), polyhydric alcohols (for example, 1,6 hexanediol, 1,2-cyclohexanediol, pentaerythritol, etc.), or polyethylene glycols.

Among the above thermal solvents, water-insoluble solid thermal solvents are particularly preferably used.

Specific examples of the above-mentioned water-soluble heat solvent include, for example, JP-A-62
-136645, 62-139549, 63-
Some of them are described in Japanese Patent Application No. 53548, Japanese Patent Application No. 63-205228, and Japanese Patent Application No. 63-54113.

Layers to which a thermal solvent is added include a photosensitive silver halide emulsion layer, an intermediate layer, a protective layer, an image receiving layer of the image receiving area H, etc., and it is added and used to obtain an effect depending on each layer. It will be done.

The preferred addition amount of the heat solvent is usually 10% to 500% by weight, more preferably 30% to 20% by weight of the amount of X inder.
It is 0% by weight.

The organic silver salt and the thermal solvent may be dispersed in the same dispersion. The same binder, dispersion medium, and dispersion device as used for producing each dispersion can be used.

The heat-developable photosensitive material of the present invention may contain various additives, such as development accelerators, antifoggants,
It can contain a base precursor and the like.

As the development accelerator, JP-A-59-177550 rock,
Compounds described in JP-A-59-111636 and JP-A-59-124333; development accelerator-releasing compounds described in JP-A-61-159642 and Japanese Patent Application No. 62-203908; Metal ions having an electronegativity of 4 or more as described in No. 104645 can also be used.

66 67 Antifoggants include, for example, U.S. Pat.
Higher fatty acids described in specification No. 739, Japanese Patent Publication No. 4
Second mercury salt described in Publication No. 7-11113, JP-A-51
-N-halogen compound described in Publication No. 47419, U.S. Patent No. 3,700,457, JP-A-51-50
No. 725 Publication 6 The mercapto compound releasing compound described herein, the arylsulfonic acid described in Publication No. 49-125016, the lithium carboxylic acid salt described in Publication No. 51-47419, the specification of British Patent No. L455,271, Oxidizing agent described in JP-A-50-101,019, No. 53
-Sulfinic acids or thiosulfonic acids described in Publication No. 19825, 2-thiouracils described in Publication No. 51-3223, simple sulfur described in Publication No. 5126019,
No. 51-42529, No. 51-81124, No. 55
Disulfide and polysulfide compounds described in Japanese Patent No. 93149, rosin or diterpenes described in Japanese Patent No. 51-57435, polymeric acids having free carboxyl groups or sulfonic acid groups described in Japanese Patent No. 51-10.1338, Thiazoline thousand ions described in U.S. Pat. No. 4,138,265, JP-A-54-5182
1, 2, 4-triazole or 5-mercapto-1. 2. 4-triazole, 'tf [thiosulfinate esters described in Fl No. 55-140883, 1,23, described in Fl No. 55-142331,
4-Diatriazole, No. 59-46641, No. 5
9-57233, the cyhalogen compounds or trihalogen compounds described in No. 59-57234, the thiol compounds described in No. 59-11.1636, the hyde-1-coquinone derivatives described in No. 60198540, Examples include a combination of the hydronitonone conductor described in JP 60-227255 and penzotriazole B%4.

Still another particularly preferred antifoggant is disclosed in JP-A No. 6
2-78554, a polymeric inhibitor described in JP-A No. 62-121452, and an inhibitor having a ballast group described in JP-A No. 62-123456. Can be mentioned.

Furthermore, colorless couplers described in Japanese Patent Application No. 62-320599 are also preferably used.

Examples of base breaker include compounds that release 68 69 basic substances by decarboxylation by heating (e.g., guanidinium trichloracetate), and compounds that decompose by reactions such as intramolecular nucleation substitution reactions to release amanes. etc. are mentioned,
For example, JP-A-56-130745, JP-A No. 56-1323
Publication No. 32, British Patent No. 2,079,480, U.S. Patent No. 4,060,420, JP-A-59-1576
No. 37, No. 59-166943, No. 59-18053
No. 7, No. 59-174830, No. 59-195237
Examples include base release agents described in Japanese Patent No. 62-108249, Japanese Patent No. 62174745, and the like.

In addition, various additives used in heat-developable photosensitive materials may be added as necessary, such as antihalation dyes, fluorescent whitening agents, hardeners, anti-electrostatic agents, plasticizers, spreading agents, capping agents,
It may contain surfactants, anti-fading agents, etc., and these are specifically described in RD (Research Disclosure) magazine Vow. 170, June 1978 Floor 17
No. 029, JP-A-62-135825, etc.

These various additives may be added not only to the photosensitive layer, but also to non-photosensitive layers such as an intermediate layer, a protective layer, or a soaking layer.

The heat-developable photosensitive material of the present invention contains (al photosensitive silver halide, (bl reducing agent, fcl binder, (d1 dye-providing substance), and optionally (e) organic silver. Basically, these may be contained in one heat-developable photosensitive layer, but they do not necessarily have to be contained in a single photographic structure, for example, if the heat-developable photosensitive layer is made into two layers. The components of (a), (bl, (e)) are contained in one heat-developable photosensitive layer, and the dye-providing substance (d) is contained in the other layer adjacent to this photosensitive layer. It may be a structure such as 2, as long as it is in a state where they can react with each other.
It may be contained separately in the above constituent layers.

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

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

Usually, a yellow dye is used in the blue-sensitive layer, a magenta dye is used in the green-sensitive layer, and a cyan dye is used in the red-sensitive layer, but the combination is not limited thereto. 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 red-sensitive layer, a green-sensitive layer, and a blue-sensitive layer may be sequentially formed on the support, or conversely, a blue-sensitive layer may be sequentially formed on the support. There is a structure in which a photosensitive layer, a green photosensitive layer, and a red photosensitive layer are formed, or a structure in which a green photosensitive layer, a red photosensitive layer, and a blue photosensitive layer are sequentially formed on the support.

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

The heat-developable photosensitive material of the present invention can be exposed to light using an appropriate light source, and examples of the exposure light source include a tungsten lamp,
Various types such as halogen lamps, xenon lamps, mercury lamps, cathode ray tube flying spots, light emitting diodes, lasers (e.g. gas lasers, YAG lasers, dye lasers, semiconductor lasers, etc.), CRT light sources, and FOT can be used singly or in combination. Can be used. A semiconductor laser, a second harmonic generation element (SIIG element), etc. can also be used. In addition, exposure may be performed using light emitted from a phosphor excited by electron beams, X-rays, γ-rays, α-rays, or the like. The exposure time is not only the 1/1000 second to 1 second exposure time normally used in cameras, but also exposures shorter than 1/1000 second, such as exposure times of 1710 to 1/108 seconds using xenon flash lamps or cathode ray tubes. can. If necessary, use JIL> and expose with a color filter. The spectral composition of the light used can be adjusted. The photosensitive material of the present invention can be used for scanner frost light using a laser or the like.

After imagewise exposure, the heat-developable photosensitive material of the present invention is usually preferably 7973 or 80°C to 200°C, more preferably 100°C to
Development can be carried out simply by heating in a temperature range of 170° C., preferably for 1 second to 180 seconds, more preferably for 1.5 seconds to 120 seconds. Transfer of the diffusible dye to the image-receiving layer may be carried out simultaneously with heat development by bringing the image-receiving member into close contact with the photosensitive surface of the photosensitive material and the image-receiving layer during heat development, or by bringing the image-receiving member into close contact with the image-receiving member after heat development. Alternatively, the transfer may be carried out by supplying water and then applying heat if necessary. Also, before exposure, 70℃~180℃
Preheating may be performed within the temperature range of . Also, JP-A-6
As described in o-+43s No. 38 and No. 61-162041, the photosensitive material and the 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 heating means can be used for the heat-developable photosensitive material of the present invention.

As the heating means, any method that can be applied to ordinary heat-developable photosensitive materials can be used, such as contacting with a heated block or plate, contacting with a heated roller or drum, or passing through a high-temperature atmosphere. Alternatively, high-frequency heating may be used, or furthermore, a conductive layer containing a conductive substance such as a carbon blank may be provided on the back surface of the photosensitive material of the present invention or the back surface of the image receiving member for thermal transfer, and the Joule heat generated by energization may be utilized. You can also do that. There are no particular restrictions on the heating process, and the method of preheating and then reheating is recommended, and the temperature can be increased continuously, even if it is heated at a high temperature for a short time or at a low temperature for 11 or Y times. It may be raised, lowered continuously, or repeated, and discontinuous heating is also possible, but a simple pattern is preferred. Alternatively, a method in which exposure and heating proceed simultaneously may be used.

When the present invention is applied to a transfer type photothermographic material, an image receiving member is used as described above. In this case, the image-receiving layer that can be effectively used in the image-receiving area system may be any layer that has the function of receiving the dye in the heat-developable photosensitive layer released or formed by heat development, such as tertiary amine or A poly 74 75 mer containing a quaternary ammonium salt as described in US Pat. No. 3,709,690 is preferably used. Typical image-receiving layers for diffusion transfer include those obtained by mixing a polymer containing ammonium salt, tertiary amine, etc. with gelatin, polyvinyl alcohol, etc., and coating the mixture on a support. As another useful dye-receiving material, JP-A-57-2
The glass transition temperature described in 07250 etc. is 40
Examples include those made of heat-resistant organic polymeric substances with a temperature of not less than 0.degree. C. and not more than 250.degree.

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

Polymer Islandbook 2 n.
d ed. (J. Brandrup, E.I.I.
mmergutli) John Wiley & So
Also useful are synthetic polymers having a glass transition temperature of 40° C. or higher, as described in .ns }. Generally, it is useful for the molecular weight of the polymer substance to be 2,000 to 200,000. 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.

A particularly preferable image-receiving layer is described in Japanese Patent Application Laid-Open No. 59-2234.
Examples include a layer that is more effective than polyvinyl chloride described in Japanese Patent Publication No. 25 and a layer that is more effective than polycarbonate and a plasticizer described in JP-A-60-19138.

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

As the support for the image receiving member, any material such as a transparent support or an opaque support may be used, but for example, films of polyethylene terephthalate, polycarbonate-1, polystyrene, polyvinyl chloride, polyethylene, polypropylene, etc.
and supports containing pigments such as oxygen titanium, barium sulfate, calcium carbonate, and talc, Haraita paper, and thermoplastic resin containing pigments on paper. Resin-coated paper, fabrics, glasses, metals such as aluminum, etc., and supports made by coating and curing electron beam-curable resin compositions containing pigments on these supports; Examples include a support in which a coating layer containing a pigment is provided on the support. Furthermore, various coated papers such as the cast coated paper described in JP-A-62-283333 are also useful as supports.

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

Appropriate additives, such as various known additives, can be added to the image receiving member. Examples of such additives include, for example, ultraviolet absorbers, image stabilizers, development accelerators, antifoggants, pH adjusters (various acids and acid precursors,
Alternatively, examples may include bases, base precursors, etc.) and hot solvents.

Typical examples of ultraviolet absorbers include benzo-1-lyazole compounds and penzophenone compounds. Examples of the image stabilizer include hindered amine-based, hindered phenol-based, dialkoxyhensen-based, chroman-based, indane-based, thioether-based, hydroquinone-based, chloro-substituted s-}riazine-based compounds, and the like. The development accelerator and antifoggant can be appropriately selected from compounds added to heat-developable photosensitive materials.

The heat-developable photosensitive material of the present invention is disclosed in RD (Research Disclosure Magazine) No. 15108, JP-A-57-19134.
No. 58, No. 57-207250, No. 61-80148
The photothermographic material may be a so-called monosheet type photothermographic material in which a photosensitive layer and an image-receiving layer are formed on the same support, as described in the above publication.

It is preferable that the heat-developable photosensitive material of the present invention is provided with a protective layer.

Various additives used in the photographic field can be used in the protective layer. The additives include 78 and 79 types of mantle agents, colloidal silicate agents, slipping agents, organic fluoro compounds (especially fluorine surfactants), antistatic agents,
Ultraviolet absorbers, high-boiling organic solvents, antioxidants, hydroquinone derivatives, polymer latex, surfactants (including polymeric surfactants), hardeners (including polymeric hardeners)
, organic silver salt particles, non-photosensitive silver halide particles, antifoggants, development accelerators and the like.

Regarding these additives, please refer to RD (Research Disclosure Magazine) Vol. 1.170. June 1978 Nl
117 [Example] The present invention will be described in more detail below with reference to Examples.
The present invention is not limited in any way by the following examples.

Example-1 <Preparation of silver iodobromide emulsion> At 50°C, JP-A No. 57-92523, No. 57
Using the mixer described in No. 92524, 20 g of ossein gelatin, 1000 ml of distilled water and ammonia were dissolved in solution (A), and 11.6 g of potassium iodide was added.
an aqueous solution containing 50 g and 131 g of potassium bromide.
0 mR of solution (B) and 500 ml of solution (C), an aqueous solution containing 1 mol of silver nitrate and ammonia, were simultaneously mixed at pA. g
was added while keeping it constant. The shape and size of the emulsion grains to be prepared are determined by the PH. The silver iodide content was adjusted by controlling the addition rate of p, Ag and the B and C solutions, and in this way, the silver iodide content was 7.
A core emulsion with a mol% regular octahedral grain size and an average grain size of 0.25 μm was prepared.

Next, in the same manner as above, a core/shell type silver halide emulsion having a regular octahedron and an average grain size of 0.3 μm was prepared by coating a silver halide shell with a silver iodide content of 1 mol %. (The coefficient of variation of silver halide grains representing monodispersity was 9%). The following components were added to 100 ml of the silver iodobromide emulsion thus prepared to prepare a green-sensitive silver halide emulsion.

<Preparation of green-sensitive silver iodobromide emulsion> 4-hydroxy-6-methyl-1,3.3a,7-tetrazaindene 0.4 g gelatin 32 g sodium thiosulfate 10 ■ The following sensitizing dye (C
) 1% methanol solution 50ml The following sensitizing dye (d) 1% methanol solution 30ml distilled water
1200 mfl Sensitizing dye (C) 82 12.4 mfl, phenyl hamoylated gelatin (Rouslot, Type 1 7 8 1 9 PC) 3.05
After mixing 72 gelatin aqueous solutions containing
The dye-donating substance dispersion (
1) to (13) were obtained.

Polymeric dye-providing substance (1) Hydroquinone compound 84 Sensitizing dye (d) <Preparation of organic silver salt dispersion> 5-methylbenzotriazole and silver nitrate obtained by reacting in a water-alcohol mixed solvent Triazole tB! 28.8 g, poly(N-vinylpyrrolidone) 16.0 g and 4-sulfohenzotriazol sodium 1.33 g were mixed and dispersed in an Altan Napol mill, and the pH was adjusted to 5.5 and 200 mR.

Preparation of dye-donating substance dispersions (1) to (24)> 3.55 g of the following polymeric dye-donating substance (1), 0.5 g of the following hydroquinone compound, and 1.1 g of tricresyl phosphate are shown in Table 1. show.

The compound of the present invention was dissolved in 20 ml of ethyl acetate, and a 5% by weight aqueous solution of Alkanol XC (manufactured by DuPont) was added. ) 14.6g, 0 fluorine surfactants listed below
．． Dissolve 5g in water and adjust to pI-15.5 to 250me
A reducing agent solution was obtained.

Reducing agent (1) Surfactant Nafl+S cll COOCIIz (CPz
CPz)mll■ CI12 COOCllz(CFzcFz)nH(m
, n = 2 or 3) <Preparation of photosensitive materials (1) to (13)> Using the organic silver salt dispersion, green-sensitive silver iodobromide emulsion, dye-providing substance dispersion and reducing agent solution prepared above, Color photosensitive elements (1) to (13) having a single layer structure were prepared as shown below.

(Note 1) Each amount added represents the amount added per bottle.

(However, silver halide is a value converted to silver.

(contains a small amount of hardening agent in addition to these) <Formation of image receiving member> Polyhinyl chloride (n-1.10
An image receiving member (1) was prepared by applying a tetrahydrofuran solution (manufactured by Wako Pure Chemical Industries, Ltd.) so that the amount of polyvinyl chloride was 12 g/ITr.

86 87 The heat-developable photosensitive materials (1) to (13) were exposed to 1,600 CMS through a step wedge, and together with the image-receiving member were heated at 150° in a heat developing machine (Deheropper Module 277.3M). After thermal development of C1'30'', the photosensitive member and the image receiving member were quickly peeled off, and a magenta negative image of the stamp wedge was obtained on the polyvinyl chloride surface of the image receiving member. Materials (1) to (13) were left for 2 days at a humidity of 80% pH and a temperature of 50°C, and were exposed and developed in the same manner to obtain a magenta step wedge negative image.

Table 2 shows the maximum density Dmax, minimum density Dmin, sensitivity, and maximum density Dmax and minimum density Dmin after storage of the magenta transfer image obtained by the above thermal development. Sensitivity is determined using the fog +0.2 point and sample No. It is expressed as a relative value with the sensitivity of 2 being 100.

Table 2 88 As is clear from the above, when the development accelerator-releasing compound of the present invention is used alone, the immediate D min is high and the fog after storage is significantly increased. On the other hand, although the inhibitor of the present invention tends to slightly reduce fog, it is not preferable because it significantly reduces the maximum density.

However, when both are used in combination, the minimum density can be reduced while maintaining the effect of increasing the maximum density due to the development accelerating effect of the development accelerator-releasing compound, and it has been found that the sensitivity is high. Even after storage, fogging can be suppressed by using the compound of the present invention.

Example-2 Photosensitive materials Nos. 14 to 27 were the same as in Example-1 except that the polymeric dye-providing substance was changed to (2) and the amount of the compound of the present invention added was changed as shown in Table 3. to create
Exposure and heat development were performed in the same manner as in Example-1 to obtain a transferred image on an image-receiving sheet.

Polymer dye-providing substance (2) CI+3 ■ 90 91 Table 3 Table 3 shows the maximum density Dmax, minimum density Dmin . ．． Sensitivity and after storage (
The maximum density Dmax and the minimum density Dmin were shown (humidity: 80%, 50'C, left for 2 days). Sensitivity was determined using sample No. 1 as a point of fog +0.2. The sensitivity of 15 is expressed as a relative value of 100.

As is clear from Table 3, by using the compound of the present invention, it is possible to have a high maximum concentration and high sensitivity, and to keep the minimum concentration after storage low.

Example 3 The same photosensitive material as in Example 1 (No. 2 7-40)
A transfer image was obtained on image receiving sheet 1.

j'・ Margin below 93 Polymer dye-providing substance (3) C113 ■ Table 4 shows the maximum density D of the cyan transfer image obtained by the above thermal development.
max, minimum density Dmin, sensitivity and maximum density after storage (humidity 80%, 50°C, left for 2 days) D max
, 94 Table 4 shows the maximum density of the cyan transfer image obtained by the above thermal development,
Minimum concentration, sensitivity and after storage (humidity 80% 50°C,
2 days. The maximum and minimum concentrations of the product (unused) are shown. The sensitivity was determined as a relative value with the sensitivity of sample No. 28 as 100 as a point of fog -+-0.2.

As is clear from Table 4, the effect of the present invention was similarly seen in cyan images.

〔Effect of the invention〕

As described above in detail, the present invention provides a heat-developable color photosensitive material that can provide a color image with high density without increasing fog, has high sensitivity, and has excellent storage stability. I can do it.

Claims (1)

[Scope of Claims] 1. A heat-developable color photosensitive material having, on a support, a photosensitive layer containing at least photosensitive silver halide, a binder, a dye-providing substance, and a reducing agent, wherein the photosensitive layer contains the following: A heat-developable color photosensitive material containing a compound represented by the general formula (1) and a compound represented by the following general formula (2). General formula (1) ▲There are mathematical formulas, chemical formulas, tables, etc.▼ [In the formula, A represents a coupler residue, B is a divalent bonding group, and one bond is the activity of the coupler residue represented by A. connected to points. C represents a development accelerator residue. n represents 0 or 1. ] General formula (2) ▲ Contains mathematical formulas, chemical formulas, tables, etc. ▼ [In the formula, X^1 represents a residue of a development inhibitor, L^1 represents a bond or a divalent group, and D represents a ballast. represents a group or
Or it represents a group having a hydrophilic group. ]