JPH09325462A - Heat-developed color photographic material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a yellow image excellent in discrimination by containing a specific compound as a coupler. SOLUTION: At least one kind of a compound expressed by the formula I or formula II as a coupler, where R1 represents hydrogen atom or alkyl group, and it has eight carbon atoms or below. Z1 represents the alicyclic hydrocarbon group having 3-6 carbon atoms. R2 represents cyano group, alkoxycarbonyl group, aryl oxycarbonyl group, alkyl carbamoyl group, aryl carbamoyl group, alkyl carbonyl group, aryl carbonyl group, alkyl sulfonyl group, aryl sulfonyl group, alkyl sulfamoyl group, aryl sulfamoyl group, or heterocyclic group. Z2 represents a group of atoms capable of forming nitrogen-containing heterocyclic group. Y represents hydrogen atom or the group releasable by the coupling reaction to a developing agent oxidant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-developable color light-sensitive material, and more particularly to a heat-development color light-sensitive material which gives a yellow dye image excellent in discrimination.

[0002]

2. Description of the Related Art A photographic method using silver halide has been used most widely since it has superior photographic characteristics such as sensitivity and gradation control as compared with other photographic methods such as electrophotography and diazo photography. I have been. In particular, since the best image quality is obtained for color hard copy, it has been studied more vigorously these days.

[0003] In recent years, image forming processing methods for photosensitive materials using silver halide have been simplified from conventional wet processing to instant photographic systems incorporating a developing solution, and dry thermal development processing by heating or the like. Systems have been developed that can rapidly obtain images. Photothermographic materials are described in “Basics of Photographic Engineering (Non-Silver Photography), Corona”, p.242-, but the content is black-and-white image formation such as dry silver. Stays in the law. Recently, as photothermographic color light-sensitive materials, products such as Pictrography and Pictrostat have been sold by Fuji Photo Film Co., Ltd.
In the above-described simple and rapid processing method, a color image is formed using a redox coloring material to which a preformed die is connected. The most common method for forming a color image of a photographic light-sensitive material is a method utilizing a coupling reaction between a coupler and an oxidized developing agent. A heat-developable color light-sensitive material employing this method is also disclosed in U.S. Pat. 761,270
No. 4,021,240, JP-A-59-2315.
Many ideas have been filed, such as No. 39 and No. 60-128438.

The inventors of the present invention also examined the above-mentioned coupling type photothermographic material of the type described in US Pat.
It was found that the sulfonamide phenol described in JP-A No. 021,240 and JP-A No. 60-128438 is a compound excellent in discrimination and raw storage stability when incorporated in a light-sensitive material. Also,
The coupling method is advantageous in terms of sensitivity, since the coupler has no absorption in the visible region before processing, as compared with a system using a coloring material in which preformed dies are connected. This means that it can be used not only as a printing material but also as a photographing material. From this viewpoint, the inventor has investigated the possibility of sulfonamidephenol as a developing agent by synthesizing various compounds. As a result, sulfonamidophenol is a compound that gives a color image excellent in raw preservation and excellent in discrimination, but in order to obtain a yellow dye image, benzoyl which is usually used in conventional color photographic light-sensitive materials. It has been found that when a yellow coupler such as an acetanilide derivative or a pivaloylacetanilide derivative is used, a yellow dye image having a sufficient density cannot be obtained.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a heat-developable color light-sensitive material capable of obtaining a yellow image excellent in discrimination.

Therefore, as a result of extensive studies on the molecular design of the yellow coupler when sulfonamidephenol is used as a developing agent, the general formula [1] of the present invention,
It was found that the compound of [2] was effective. In addition, as a result of investigating the molecular design of the main drug at the same time, it was found that a compound having an arylsulfonyl group as a leaving group of sulfonamidephenol and a substituent at the ortho position has extremely high activity. The inventors searched for a more preferable compound and found that the leaving group having an electron donating ballast group is an important factor in addition to the substituent at the ortho position.

[0007]

The objects of the present invention have been achieved by the following heat-developable color light-sensitive material.

1) A heat-developable color light-sensitive material having a developing agent capable of forming a dye by a coupling reaction of at least a light-sensitive silver halide, a binder, a coupler, and an oxidant with the coupler on a support. A heat-developable color light-sensitive material characterized by containing at least one compound represented by the following general formula [1] or [2] as a coupler. General formula [1]

[0009]

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General formula [2]

[0011]

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In the formula, R ₁ represents a hydrogen atom or an alkyl group, and its carbon number is 8 or less. Z ₁ has 3 to 3 carbon atoms
6 represents the alicyclic hydrocarbon group of 6. R ₂ is a cyano group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylcarbamoyl group, an arylcarbamoyl group, an alkylcarbonyl group, an arylcarbonyl group, an alkylsulfonyl group, an arylsulfonyl group, an alkylsulfamoyl group, an arylsulfamoyl group. Alternatively, it represents a heterocyclic group. Z ₂ represents an atomic group capable of forming a nitrogen-containing heterocyclic group.
Y represents a hydrogen atom or a group which can be eliminated by a coupling reaction with an oxidized developing agent.

2) The photothermographic material according to claim 1, wherein Y in the general formulas [1] and [2] is a hydrogen atom and R ₂ is an arylcarbamoyl group.

3) The heat-developable color light-sensitive material as described in 1 or 2, wherein the alicyclic hydrocarbon group formed by Z ₁ in the general formula [1] is a cyclopropyl group.

4) A heat-developable color light-sensitive material as described in any one of items 1 to 3, which contains a compound represented by the following general formula [3] as a developing agent. General formula [3]

[0016]

[Chemical 6]

In the formula, R _{3 to} R ₆ represent a substituent, and the sum of the Hammett substituent constants (σ value) thereof is 0 or more. R _{7 to} R ₁₁ represent a substituent, and a group having a total Hammett substituent constant (σ value) of 0 or less. R ₇ and / or R ₁₁ have a substituent other than a hydrogen atom. R ₇
And R ₈ or R ₁₀ and R ₁₁ may combine with each other to form a ring.

5) R_Three~ R₆In the inside,
Having a last group or R₇~ R ₁₁Carbon number of
The thermal development according to claim 4, characterized in that
Color photosensitive material.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.

The compound represented by the general formula [1] is a ketoanilide type yellow coupler having a cycloalkyl group in the keto portion and is a compound known in the art. As a specific example of this coupler, Japanese Patent Application Laid-Open No. 4-21804 is available.
The compounds described in No. 2 are mentioned.

Next, the compound represented by the general formula [2] is
It is a yellow coupler containing a heterocyclic amide group having an N atom substituted with a carbonyl group in its partial structure in place of the keto group, and this compound is also a compound known in the art. Specific examples of this coupler include compounds described in JP-A-5-11416.

Hereinafter, these compounds will be described in detail.
In the formulas [1] and [2], R ₁ represents a hydrogen atom or a substituted or unsubstituted alkyl group (for example, a methyl group, an ethyl group, a propyl group, a butyl group, a benzyl group), and its carbon number is It is 8 or less. Of these, a methyl group, an ethyl group and a benzyl group are particularly preferable, and a methyl group and an ethyl group are particularly preferable.

R ₂ is a cyano group, an alkoxycarbonyl group which may have a substituent, an aryloxycarbonyl group, an alkylcarbamoyl group, an arylcarbamoyl group, an alkylcarbonyl group, an arylcarbonyl group,
It represents an alkylsulfonyl group, an arylsulfonyl group, an alkylsulfamoyl group, an arylsulfamoyl group, or a heterocyclic group. An arylcarbamoyl group or an alkylcarbamoyl group is preferable, and among these, an arylcarbamoyl group having a substituent is particularly preferable. Examples of the group substituting the aryl group in the arylcarbamoyl group include a substituted or unsubstituted alkyl group (eg, methyl group, ethyl group, t-butyl group, cyclohexyl group, etc.), alkenyl group (eg, vinyl group, alkyl group). Vinyl group), alkynyl group (eg phenylacetylene group), aryl group (eg phenyl group, tolyl group, naphthyl group, alkylphenyl group, alkoxyphenyl group,
Acylphenyl group), heterocyclic group (eg pyridyl group,
Furyl group, morpholyl group, piperidyl group), alkoxy group (eg methoxy group, ethoxy group, benzyloxy group, dodecyloxy group), aryloxy group (eg phenoxy group, naphthyloxy group), alkylthio group (eg methylthio group, ethylthio group) Group), an arylthio group (for example, a phenylthio group, a tolylthio group), a cyano group,
Halogen atom, alkylsulfonyl group (eg methanesulfonyl group, ethanesulfonyl group, octanesulfonyl group), arylsulfonyl group (eg phenylsulfonyl group, toluenesulfonyl group, 3,5-di-methoxycarbonylphenylsulfonyl group), alkylcarbonyl group (For example, acetyl group, propionyl group, pivaloyl group), arylcarbonyl group (for example, benzoyl group, naphthylcarbonyl group), alkylcarbonamide group (for example, acetylamino group, 2-ethylhexanoylamino group, pivaloylamino group, succinimide group), Aryl carbonamide group (for example, benzoylamino group, phthalimido group), alkylsulfonamide group (for example, methanesulfonamide group, ethanesulfonamide group), arylsulfonamide (Eg, benzenesulfonamide group, toluenesulfonamide group, naphthalenesulfonamide group), carbamoyl group, alkylcarbamoyl group (eg, methylcarbamoyl group, dimethylcarbamoyl group, diethylcarbamoyl group, ethylphenylcarbamoyl group, piperidylcarbamoyl group, morpholylcarbamoyl group) Group), arylcarbamoyl group (eg, phenylcarbamoyl group), sulfamoyl group, alkylsulfamoyl group (eg, dimethylsulfamoyl group, diethylsulfamoyl group, dibutylsulfamoyl group, pyrrolidylsulfamoyl group, morpholylsulfyl group) Famoyl group), alkoxycarbonyl group (eg methoxycarbonyl group, ethoxycarbonyl group, 2,6-di-t-butyl-4-methyl-1-cyclohexyloxy group) Carbonyl group), aryloxycarbonyl group (for example, phenoxycarbonyl group, alkylphenoxycarbonyl group), alkylamino group (for example, dimethylamino group, diethylamino group, morpholyl group, 2,2,6,6-tetramethylpiperidyl group), aryl Various substituents such as an amino group (for example, N-methylanilino group, N-ethyltoluidyl group), a hydroxyl group, a sulfo group, and the like can be given. Among them, preferable groups in the present invention include a halogen atom, an alkoxy group, an aryloxy group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylcarbonyl group, an arylcarbonyl group, an alkylcarbamoyl group,
Arylcarbamoyl group, alkylsulfamoyl group,
Examples thereof include an arylsulfamoyl group, an alkylsulfonyl group, an arylsulfonyl group, an acylamino group and a sulfonamide group. In particular, a compound in which a halogen atom or an alkoxy group is substituted at the ortho position of the anilide group is preferable, and a compound in which a chloro group or a methoxy group is substituted is particularly preferable. Further, it is preferable that a ballast group having 8 or more carbon atoms is substituted in the substituent. This is to prevent the coupler from moving from its coating layer to another layer during coating, storage of the photosensitive material, processing, and the like.

Z ₁ represents a cycloalkyl group having 6 or less carbon atoms (for example, cyclopropyl group, cyclobutyl group, cyclopentyl group, cyclohexyl group). Of these, a cyclopropyl group is preferable. Z ₂ represents an atomic group capable of forming a nitrogen-containing heterocyclic group. Examples of the nitrogen-containing heterocycle represented by Z ₂ include compounds having the following structures.

[0025]

[Chemical 7]

The rings of Z ₁ and Z ₂ may be substituted, and examples thereof include groups which can be substituted on the arylcarbamoyl group of R ₂ . Y represents a hydrogen atom or a group which can be eliminated by a coupling reaction with an oxidized developing agent. Examples of Y include a carboxyl group, a formyl group, a halogen atom,
(Eg, bromine, iodine), carbamoyl group, methylene group having a substituent (substituents include aryl group, sulfamoyl group, carbamoyl group, alkoxy group, amino group, hydroxyl group, etc.), acyl group, sulfo group and the like. .
Among them, Y is preferably a hydrogen atom. This is because, in the present invention, a sulfonamide phenol represented by the general formula [3] is used as a coupling developing agent as described later. When this compound is used, in the coupling reaction at the time of dye formation, in the elimination reaction after coupling, sulfinic acid is eliminated as an anion from the developing agent side, so the leaving group from the coupler side must be a cation. . Therefore, conventional 2-equivalent couplers are not suitable because the leaving group substituted is of an anion leaving type. For this reason, in the present invention, a 4-equivalent coupler in which Y is a hydrogen atom is most preferred.

The couplers represented by the general formulas [1] and [2] can be synthesized by a combination of known methods. Hereinafter, a typical synthesis example is described as a reaction scheme.

[0028]

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[0029]

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Specific examples of the couplers represented by the general formulas [1] and [2] are shown below, but the couplers of the present invention are not limited to them.

[0031]

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[0032]

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[0033]

[Chemical 12]

[0034]

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[0035]

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[0036]

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The addition amount of the coupler of the present invention depends on its molar extinction coefficient (ε), but in order to obtain an image density of 1.0 or more in transmission density, ε of the dye formed by coupling is 5000. In the case of a coupler of about ~ 500,000,
The coating amount is about 0.001 to 100 mmol / m ² , preferably 0.01 to 10 mmol / m ² , and more preferably about 0.05 to 5 mmol / m ² .

Next, the compound represented by the general formula [3] will be described in detail. Hammett substituent constants (σ values) in R _{3 to} R ₁₁ are shown in Chemical Review, 1991, Vol. 91, N.
o.2, P165-194 and Journal of Medical Chemist
ry, 1973, Vol.16, No.11, P1207-12
16 can be referred to.

The compound represented by the general formula [3] represents a developing agent generally called sulfonamidephenol. In the formula, R _{3 to} R ₆ are preferably hydrogen atom, halogen atom, alkyl group, aryl group, alkyl carbonamide group, aryl carbonamide group, alkyl sulfonamide group, aryl sulfonamide group, alkoxy group, aryloxy group. , Alkylthio group, arylthio group, alkylcarbamoyl group, arylcarbamoyl group, carbamoyl group, alkylsulfamoyl group, arylsulfamoyl group, sulfamoyl group, cyano group, alkylsulfonyl group, arylsulfonyl group, alkoxycarbonyl group, aryloxy It represents a carbonyl group, an alkylcarbonyl group, an arylcarbonyl group, or an acyloxy group. Particularly, R _{3 to} R ₆ are hydrogen atom, halogen atom (eg, chloro group, bromine group), alkyl group (eg, methyl group, ethyl group, isopropyl group, n-butyl group, t-butyl group), aryl group (eg, phenyl group). Group, tolyl group, xylyl group), alkylcarbonamide group (eg acetylamino group, propionylamino group, butyroylamino group), arylcarbonamide group (eg benzoylamino group), alkylsulfonamide group (eg methanesulfonylamino group) , Ethanesulfonylamino group), arylsulfonamide group (eg benzenesulfonylamino group, toluenesulfonylamino group), alkoxy group (eg methoxy group, ethoxy group), aryloxy group (eg phenoxy group), alkylthio group (eg methylthio group) , Ethylthio group Butylthio group), arylthio group (eg phenylthio group, tolylthio group), alkylcarbamoyl group (eg methylcarbamoyl group, dimethylcarbamoyl group, ethylcarbamoyl group, diethylcarbamoyl group, dibutylcarbamoyl group, piperidylcarbamoyl group, morpholylcarbamoyl group), Arylcarbamoyl group (eg, phenylcarbamoyl group, methylphenylcarbamoyl group, ethylphenylcarbamoyl group, benzylphenylcarbamoyl group), carbamoyl group, alkylsulfamoyl group (eg, methylsulfamoyl group, dimethylsulfamoyl group, ethylsulfamoyl group) Moyl group, diethylsulfamoyl group, dibutylsulfamoyl group, piperidylsulfamoyl group, morpholylsulfamoyl group), arylsulfa Moyl group (eg, phenylsulfamoyl group, methylphenylsulfamoyl group, ethylphenylsulfamoyl group, benzylphenylsulfamoyl group), sulfamoyl group, cyano group, alkylsulfonyl group (eg, methanesulfonyl group, ethanesulfonyl group) ), An arylsulfonyl group (for example, phenylsulfonyl group, 4-chlorophenylsulfonyl group, p-toluenesulfonyl group), an alkoxycarbonyl group (for example, methoxycarbonyl group, ethoxycarbonyl group, butoxycarbonyl group), an aryloxycarbonyl group (for example, phenoxycarbonyl group). Group), an alkylcarbonyl group (eg acetyl group, propionyl group, butyroyl group), an arylcarbonyl group (eg benzoyl group, alkylbenzoyl group), or an acyloxy group For example represents an acetyloxy group, propionyloxy group, a butyroyloxy group). The sum of the Hammett constant σ values of R _{3 to} R ₆ is 0 or more. Of R _{3 to} R ₆ , R ₄ and R ₆ are more preferably hydrogen atoms. Further, one of R ₃ and R ₅ is preferably a group having a Hammett substituent constant (σ value) of 0 or more, and particularly, a halogen atom, a cyano group, an alkylcarbamoyl group, an arylcarbamoyl group, an alkoxycarbonyl group, an aryloxycarbonyl group. A group, an arylsulfamoyl group and an alkylsulfamoyl group are preferred.

R₇~ R₁₁Is the Hammett substituent constant (σ value)
Represents a group having a total of 0 or less. R ₇And / or R
₁₁Has a substituent other than a hydrogen atom. R₇And R₈Also
Is R ₁₁And R₁₂May combine with each other to form a ring.

As the substituents of R _{7 to} R ₁₁ , a hydrogen atom,
Halogen atom, alkyl group, aryl group, alkylcarbonamide group, arylcarbonamide group, alkylsulfonamide group, arylsulfonamide group, alkoxy group, aryloxy group, alkylthio group, arylthio group, alkylcarbamoyl group, arylcarbamoyl group, Carbamoyl group, alkylsulfamoyl group, arylsulfamoyl group, sulfamoyl group, cyano group,
Examples include an alkylsulfonyl group, an arylsulfonyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylcarbonyl group, an arylcarbonyl group, an acyloxy group, and a heterocyclic group. Especially R ₇ and /
Alternatively, R ₁₁ has a substituent other than a hydrogen atom. R ₇ and R ₉ or R ₁₀ and R ₁₁ may combine with each other to form a ring.

Particularly, examples of the substituent include, for example, a hydrogen atom, a halogen atom (eg, chloro group, bromine group), an alkyl group (eg, methyl group, ethyl group, isopropyl group, n-butyl group, t-butyl group). , Aryl group (eg phenyl group, tolyl group, xylyl group), alkylcarbonamide group (eg acetylamino group, propionylamino group, butyroylamino group), arylcarbonamide group (eg benzoylamino group), alkylsulfonamide group (Eg, methanesulfonylamino group, ethanesulfonylamino group), arylsulfonamide group (eg, benzenesulfonylamino group, toluenesulfonylamino group), alkoxy group (eg, methoxy group, ethoxy group), aryloxy group (eg, phenoxy group), Alkylthio group (eg In methylthio group, ethylthio group, butylthio group), an arylthio group (e.g., phenylthio group, tolylthio group), alkylcarbamoyl groups (e.g. methylcarbamoyl group, dimethylcarbamoyl group, ethylcarbamoyl group, diethylcarbamoyl group,
Dibutylcarbamoyl group, piperidylcarbamoyl group,
Morpholylcarbamoyl group), arylcarbamoyl group (eg, phenylcarbamoyl group, methylphenylcarbamoyl group, ethylphenylcarbamoyl group, benzylphenylcarbamoyl group), carbamoyl group, alkylsulfamoyl group (eg, methylsulfamoyl group, dimethylsulfa Moyl group, ethylsulfamoyl group, diethylsulfamoyl group, dibutylsulfamoyl group,
Piperidylsulfamoyl group, morpholylsulfamoyl group), arylsulfamoyl group (for example, phenylsulfamoyl group, methylphenylsulfamoyl group, ethylphenylsulfamoyl group, benzylphenylsulfamoyl group), sulfamoyl Group, cyano group, alkylsulfonyl group (eg, methanesulfonyl group, ethanesulfonyl group), arylsulfonyl group (eg, phenylsulfonyl group, 4-chlorophenylsulfonyl group, p-
Toluenesulfonyl group), alkoxycarbonyl group (eg methoxycarbonyl group, ethoxycarbonyl group, butoxycarbonyl group), aryloxycarbonyl group (eg phenoxycarbonyl group), alkylcarbonyl group (eg acetyl group, propionyl group, butyroyl group), aryl It represents a carbonyl group (eg, benzoyl group, alkylbenzoyl group), an acyloxy group (eg, acetyloxy group, propionyloxy group, butyroyloxy group), or a heterocyclic group (eg, pyridyl group, pyrimidyl group). In particular, R ₇ and / or R ₁₁ has a substituent other than a hydrogen atom. R ₇ and R ₈ or R ₁₀ and R ₁₁ may combine with each other to form a ring (eg, naphthalene ring, tetralin ring, coumarin ring). In addition, R _{7 to} R ₁₁
The sum of Hammett's substituent constants (σ value) is 0 or less. In the present invention, among the above-mentioned substituents, a group having a σ value of 0 or less is preferable, and an alkyl group, an aryl group, an alkoxy group, an acylamino group, a sulfonamide group and the like are particularly preferable. Especially R ₇ , R
₁₁ is preferably an alkyl group, and most preferably R ₇ , R ₉ , and R ₁₁ are alkyl groups.

The compound represented by the general formula [3] is preferably an oil-soluble compound for the purpose of the present invention. For this reason, it is necessary that at least one group having ballast property is contained. The term “ballast group” as used herein means an oil-solubilizing group and is a group containing an oil-soluble partial structure having 8 to 80 carbon atoms, preferably 10 to 40 carbon atoms. Therefore, it is preferable that R _{3 to} R ₆ have a ballast group having 8 or more carbon atoms, or that the total carbon number of R _{7 to} R ₁₁ is 8 or more. As this carbon number,
It is preferably from 8 to 80, and more preferably from 8 to 20.

The addition amount of the developing agent represented by the general formula [3] has a wide range, but it is preferably 0.
An appropriate amount is 01 to 100 times by mole, more preferably 0.1 to 10 times by mole.

The developing agent represented by the general formula [3] can be synthesized by a combination of known methods. Hereinafter, a typical synthesis example is described as a reaction scheme.

[0046]

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[0047]

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Specific examples of the compound represented by the general formula [3] are shown below, but the compound of the present invention is not limited thereto.

[0049]

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[0050]

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[0051]

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[0052]

[Chemical 21]

[0053]

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To add the couplers represented by the general formulas [1] and [2] and the developing agent represented by the general formula [3], first, the coupler, the developing agent and the high boiling point organic solvent (for example, phosphoric acid) are added. Alkyl ester, phthalic acid alkyl ester, etc.) may be mixed and dissolved in a low boiling point organic solvent (eg, ethyl acetate, methyl ethyl ketone, etc.) and dispersed in water using an emulsion dispersion method known in the art, and then added. it can. Further, addition by the solid dispersion method described in JP-A-63-271339 is also possible.

In the present invention, as the dye-donating compound other than yellow, a compound (coupler) which forms a dye by an oxidative coupling reaction is also used. This coupler is 4
It may be either an equivalent coupler or a 2 equivalent coupler, but a 4 equivalent coupler is preferred in the present invention. The reason is as described above. Specific examples of couplers are
Both the 4-equivalent and 2-equivalent theory of the photographic process (4th. Ed. THH Ja)
eds. Macmillan, 1977) pages 291 to 334 and 354 to 361, JP-A-58-
12353, 58-149046, 58-14
No. 9047, No. 59-11114, No. 59-1243.
No. 99, No. 59-174835, No. 59-23153
No. 9, No. 59-231540, No. 60-2951,
60-14242, 60-23474, 60
It is described in detail in, for example, No. 66249.

The color light-sensitive material of the present invention basically has a photosensitive silver halide, a coupler as a dye-donating compound, a reducing agent and a binder on a support, and further, if necessary, an organometallic hydrochloric acid. Agents and the like can be included. These components are often added to the same layer, but if they can react, they can be added separately to separate layers.

In order to obtain a wide range of colors on the chromaticity diagram by using the three primary colors of yellow, magenta and cyan, a combination of at least three silver halide emulsion layers sensitive to different spectral regions is used. . For example, there are three layers of a blue sensitive layer, a green sensitive layer, and a red sensitive layer, and a combination of a green sensitive layer, a red sensitive layer, and an infrared sensitive layer. Each of the light-sensitive layers can take various arrangement orders known in ordinary color light-sensitive materials. Further, each of these photosensitive layers may be divided into two or more layers if necessary.

The light-sensitive material may be provided with various auxiliary layers such as a protective layer, an undercoat layer, an intermediate layer, an antihalation layer and a back layer. Further, various filter dyes can be added to improve color separation.

Generally, a base is required for processing a photographic light-sensitive material, but various methods for supplying a base can be adopted in the light-sensitive material of the present invention. For example, when a base generating function is imparted to the light-sensitive material side, it can be introduced into the light-sensitive material as a base precursor. Examples of such a base precursor include salts of an organic acid and a base which are decarboxylated by heat, compounds which release amines by an intramolecular nucleophilic substitution reaction, Lossen rearrangement or Beckmann rearrangement. For this example, see US Pat. Nos. 4,514,493 and 46,463.
No. 57848 and the like.

Further, in the case of using a form in which a light-sensitive material and a processing sheet are superposed and processed, a method of introducing a base or a base precursor into the processing sheet can also be used. As the base in this case, an organic base such as an amine derivative can be used in addition to the inorganic base.

It is also possible to use a reaction in which a base precursor is contained in each of the light-sensitive material side and the processed sheet side to generate a base by a reaction between the two. Examples of such a two-agent reaction type base generation method include a method based on a reaction between a poorly soluble basic metal salt and a chelating agent and a method based on a reaction between a nucleophilic agent and an epoxy compound. This example is described in JP-A-63-198050 and the like. In this case, heating may be performed with a small amount of solvent (such as water) contained between the photosensitive material and the processing sheet. The method for applying the solvent will be described later. As the solvent, a polar liquid, particularly water, is preferred.

As the support for the light-sensitive material of the present invention, those known in the art, particularly for heat-developable light-sensitive materials, can be used. Examples of such a support include a paper support laminated with polyethylene, a polyester support represented by polyethylene terephthalate and polyethylene naphthalate, and the like. An example of such a support is disclosed in JP-A-63-18986.
No. 0 has a detailed description.

As the support of the light-sensitive material of the present invention, in addition to those mentioned above, a support obtained by stretching a styrene polymer having a syndiotactic structure can be preferably used. This polymer support is similar to that described above,
It may be a homopolymer or a copolymer. Such a polymer support is described in detail in Japanese Patent Application No. 7-45079.

The silver halide emulsion used in the present invention may be either a surface latent image type emulsion or an internal latent image type emulsion. The internal latent image type emulsion is used as a direct reversal emulsion in combination with a nucleating agent or an optical fogging. Further, a so-called core-shell emulsion in which the inside of the grain and the surface layer of the grain have different phases may be used, and silver halides having different compositions may be joined by epitaxial joining. The silver halide emulsion may be monodisperse or polydisperse.
As described in JP-A Nos. 7,743 and 4-223,463, a method of mixing monodispersed emulsions and adjusting gradation is preferably used. The particle size is 0.1-2 μm, especially 0.2-
1.5 μm is preferable. The crystal habits of silver halide grains include those having regular crystals such as cubic, octahedral, and tetrahedral, those having irregular crystal systems such as spheroids and high aspect ratio tabular, and those having twin planes. It may be one having such a crystal defect, or a composite system thereof, or any other.
Specifically, US Pat. No. 4,500,626 No. 50
No. 4,628,021, Research Disclosure Magazine (hereinafter abbreviated as RD) No. 17,029 (1
No. 17,643 (December 1978)
Nos. 18,716 (November 11, 1979)
No. 307, 105 (November 1989)
Mon.) pp.863-865, JP-A-62-253,159.
No. 64-13,546, JP-A-2-236,54
No. 6, No. 3-110, 555 and "Physics and Chemistry of Photography" by Grafkid, published by Paul Montell (F. Glafk)
ides, Chemie et Phisique Photographique, Paul Mont
el, 1967), "Photographic Emulsion Chemistry" by Duffin, published by Focal Press (GF Duffin, Photographic Emulsio).
n Chemistry, Focal Press, 1966), "Manufacture and Coating of Photographic Emulsions", by Zerikman et al., Published by Focal Press (VL Zelikman et al., Making and Coating Photog).
Raphic Emulsion, Focal Press, 1964) and the like can be used.

In the process of preparing the light-sensitive silver halide emulsion of the present invention, it is preferable to carry out so-called desalting to remove excess salt. As a means for this, a Nudel washing method performed by gelling gelatin may be used, and inorganic salts composed of polyvalent anions (eg, sodium sulfate), anionic surfactants, anionic polymers (eg, polystyrenesulfonic acid) Sodium) or a precipitation method using a gelatin derivative (for example, aliphatic acylated gelatin, aromatic acylated gelatin, aromatic carbamoylated gelatin, etc.). The sedimentation method is preferably used.

The photosensitive silver halide emulsion used in the present invention may contain heavy metals such as iridium, rhodium, platinum, cadmium, zinc, thallium, lead, iron and osmium for various purposes. These compounds may be used alone or in combination of two or more. The addition amount depends on the purpose of use, but is generally about 10 ^-9 to 10 ^-3 mol per mol of silver halide. When it is contained, it may be uniformly added to the particles, or may be localized inside or on the surface of the particles. Specifically, the emulsions described in JP-A-2-236542, JP-A-1-116637, JP-A-5-181246 and the like are preferably used.

In the step of forming grains of the light-sensitive silver halide emulsion of the present invention, as a silver halide solvent, a rhodan salt, ammonia, a 4-substituted thioether compound or JP-B No. 47-1 is used.
An organic thioether derivative described in 1,386 or a sulfur-containing compound described in JP-A-53-144319 can be used.

Other conditions are described in the above-mentioned "Graphics and Physics of Photography" by Graphide, published by Paul Montel (F. G.
lafkides, Chemie et Phisique photographique, Paul
Montel, 1967), Duffin's "Emulsion Chemistry", Focal Press (GFDuffin, Photographic Emul)
sion Chemistry, Focal Press, 1966), "Manufacture and coating of photographic emulsions" by Zerikman et al., published by Focal Press (VL Zelikman et al., Making and Coating Phot).
For example, reference may be made to descriptions such as ographic Emulsion, Focal Press, 1964). That is, any of an acidic method, a neutral method, and an ammonia method may be used, and a method of reacting a soluble silver salt and a soluble halide may be any of a one-sided mixing method, a double-sided mixing method, and a combination thereof. In order to obtain a monodisperse emulsion, a simultaneous mixing method is preferably used. A back mixing method in which the grains are formed in the presence of excess silver ions can also be used. As one type of the double jet method, a so-called controlled double jet method in which pAg in a liquid phase in which silver halide is formed is kept constant can be used.

Further, in order to accelerate the grain growth, the addition concentration, the addition amount and the addition speed of the silver salt and the halogen salt to be added may be increased (JP-A-55-142,329 and JP-A-55-158). 124, U.S. Pat. No. 3,650,757). Further, the method of stirring the reaction solution may be any known stirring method. The temperature and pH of the reaction solution during the formation of silver halide grains may be set in any manner depending on the purpose. The preferred pH range is between 2.2 and 8.5, more preferably between 2.5 and 7.5.

The photosensitive silver halide emulsion is usually a chemically sensitized silver halide emulsion. For the chemical sensitization of the photosensitive silver halide emulsion of the present invention, a sulfur sensitization method, a selenium sensitization method, a chalcogen sensitization method such as a tellurium sensitization method, gold, platinum, and the like, which are known for an emulsion for a normal type light-sensitive material, are used. A noble metal sensitization method and a reduction sensitization method using palladium or the like can be used alone or in combination (for example, see JP-A-3-11055).
No. 5, No. 5-241267, etc.). These chemical sensitizations can be carried out in the presence of a nitrogen-containing heterocyclic compound (Japanese Patent Application Laid-Open No. 62-253,159). Further, an antifoggant described later can be added after the completion of the chemical sensitization. Specifically, JP-A-5-45,833, JP-A-62-40,
The method described in No. 446 can also be used. The pH during chemical sensitization is preferably 5.3 to 10.5, more preferably 5.5 to 8.5, and pAg is preferably 6.0 to 1.
It is 0.5, and more preferably 6.8 to 9.0. The coating amount of the photosensitive silver halide emulsion used in the present invention is in the range of 1 mg to 10 g / m ² in terms of silver.

In order to impart the green-sensitive, red-sensitive and infrared-sensitive color sensitivity of the photosensitive silver halide used in the present invention, the photosensitive silver halide emulsion is spectrally sensitized with a methine dye or the like. . If necessary, the blue-sensitive emulsion may be subjected to spectral sensitization in the blue region. The dyes used include cyanine dyes, merocyanine dyes, complex cyanine dyes, complex merocyanine dyes, holopolar cyanine dyes, hemicyanine dyes, styryl dyes and hemioxonol dyes. Specifically, U.S. Pat.
617,257, JP-A-59-180,550, JP-A-64-13,546, JP-A-5-45,828 and JP-A-5-45,834. These sensitizing dyes may be used alone, or a combination thereof may be used. The combination of sensitizing dyes is often used particularly for the purpose of supersensitization or wavelength adjustment of spectral sensitivity. Along with the sensitizing dye, a dye having no spectral sensitizing effect itself or a compound that does not substantially absorb visible light and exhibits supersensitization may be contained in the emulsion (for example, US Pat. 615, 641 and those described in JP-A-63-23, 145). These sensitizing dyes may be added to the emulsion at the time of chemical ripening or before or after the chemical ripening, or according to U.S. Pat. Nos. 4,183,756 and 4,225,666 before and after the nucleation of silver halide grains. Good. These sensitizing dyes and supersensitizers may be added as a solution of an organic solvent such as methanol, a dispersion of gelatin or the like, or a solution of a surfactant. The addition amount is generally from 10 ^-8 to 10 per mol of silver halide.
^-2 moles.

The additives used in such steps and the known photographic additives which can be used in the light-sensitive material and the processing sheet of the present invention are described in RD No. 17,643 and No. 1 above.
8, 715 and No. 307, 105, and the corresponding parts are summarized in the table below.

Types of additives RD17643 RD18716 RD307105 1. 1. Chemical sensitizer page 23 page 648 right column page 866 2. Sensitivity increasing agent, page 648, right column 3. Spectral sensitizer, pages 23-24, page 648, right column 866-868, super sensitizer ~ page 649, right column 4. Optical brightener page 24 page 648 right column page 868 5. Antifoggant, pages 24 to 25, page 649, right column, pages 868 to 870, stabilizer. 6. Light absorbers, pages 25 to 26, page 649, right column, page 873, filter dyes, 頁 650, left column, ultraviolet absorbers. 7. Dye image stabilizer page 25 650 page left column page 872 Hardener, page 26, page 651, left column, pages 874-875 9. Binder page 26 page 651 left column pages 873-874 10. Plasticizer, lubricant page 27 page 650 right column page 876 11. Coating aid, page 26-27 page 650 right column pages 875-876 Surfactant 12. 12. Static prevention, page 27, page 650, right column, pages 876-877. Matting agent 878-879

As the binder for the constituent layers of the photosensitive material, hydrophilic binders are preferably used. Examples thereof include the above-mentioned Research Disclosure and JP-A-64-13 / 1988.
No. 546, pages (71) to (75). Specifically, a transparent or translucent hydrophilic binder is preferable, and examples thereof include proteins such as gelatin and gelatin derivatives or cellulose derivatives, starch, gum arabic,
Examples include natural compounds such as polysaccharides such as dextran and pullulan, and synthetic high molecular compounds such as polyvinyl alcohol, polyvinylpyrrolidone, and acrylamide polymer. Also, U.S. Pat. No. 4,960,681,
No. 2-245260, etc., ie, a homopolymer of a vinyl monomer having —COOM or —SO ₃ M (M is a hydrogen atom or an alkali metal), or a vinyl monomer or another vinyl Copolymers with monomers (for example, sodium methacrylate, ammonium methacrylate, Sumikagel L-5H manufactured by Sumitomo Chemical Co., Ltd.) are also used. These binders can be used in combination of two or more. Particularly, a combination of gelatin and the above binder is preferable. The gelatin may be selected from lime-processed gelatin, acid-processed gelatin, and so-called demineralized gelatin having a reduced content of calcium and the like according to various purposes, and it is also preferable to use them in combination.

In the present invention, an organic metal salt may be used as an oxidizing agent together with the light-sensitive silver halide emulsion. Among such organic metal salts, organic silver salts are particularly preferably used. Organic compounds that can be used to form the above organic silver salt oxidizing agents include those described in US Pat.
There are benzotriazoles, fatty acids and other compounds described in 00,626, columns 52 to 53 and the like. The acetylene silver described in U.S. Pat. No. 4,775,613 is also useful. Two or more organic silver salts may be used in combination. The above organic silver salt is 0.01 mol per mol of photosensitive silver halide.
10 to 10 mol, preferably 0.01 to 1 mol, can be used in combination. Total coating amount of light-sensitive silver halide emulsion and the organic silver salt is 0.05 to 10 g / m ² in terms of silver, and preferably from 0.1-4 g / m ^2. In the light-sensitive material of the present invention, a compound for stabilizing an image simultaneously with activation of development can be used. Specific compounds preferably used are described in US Pat. No. 4,500,626, Nos. 51 to 51.
It is described in column 52. In addition, Japanese Patent Application No. 6-20633.
Compounds capable of fixing silver halide as described in No. 1 can also be used.

As the hardener used in the constituent layers of the light-sensitive material, the above-mentioned Research Disclosure, US Pat. No. 4,678,739, column 41, 4,791,042 can be used.
JP-A-59-116,655 and JP-A-62-245,
No. 261, No. 61-18, 942, JP-A-4-21
Hardening agents described in JP-A-8,044 and the like can be mentioned. More specifically, aldehyde hardeners (such as formaldehyde), aziridine hardeners, epoxy hardeners, and vinyl sulfone hardeners (N, N'-ethylene-bis (vinylsulfonylacetamide)) Ethane), an N-methylol-based hardening agent (such as dimethylol urea), or a polymer hardening agent (compounds described in JP-A-62-234157). These hardeners are used in an amount of 0.001 to 1 g, preferably 0.001 g per g of gelatin applied.
5 to 0.5 g are used. The layer to be added may be any of the constituent layers of the light-sensitive material and the dye-fixing material.
It may be added in layers or more.

Various antifoggants or photographic stabilizers and their precursors can be used in the constituent layers of the light-sensitive material. Specific examples thereof include the aforementioned Research Disclosure, US Pat. No. 5,089,378.
Nos. 4,500,627 and 4,614,702
No., JP-A-64-13546, pages (7) to (9),
(57)-(71) and (81)-(97), U.S. Pat. Nos. 4,775,610 and 4,626,500.
No. 4,983,494, JP-A-62-174,7
No. 47, 62-239, 148, 63-264,
747, JP-A-1-150,135, 2-11
0,557, 2-178,650, RD17,6
43 (1978), pages (24) to (25). These compounds are available in 5 moles per mole of silver.
X 10 ^-6 to 1 x 10 ^-1 mol is preferred, and 1 x 10
^-5 to 1 × 10 ^-2 mol is preferably used.

In the constituent layers of the light-sensitive material, various surfactants can be used for the purpose of coating aid, improvement of releasability, improvement of slipperiness, prevention of electrification, acceleration of development and the like. Specific examples of surfactants are described in Research Disclosure,
2-173,463 and 62-183,457. The constituent layers of the photothermographic material may contain an organic fluoro compound for the purpose of improving slipperiness, preventing static charge, improving releasability, and the like. Typical examples of the organic fluoro compound include fluorine-containing surfactants and fluorine oils described in JP-B-57-9053, columns 8 to 17, JP-A-61-29444, JP-A-62-135826 and the like. The hydrophobic fluorine compound such as the oily fluorine-based compound or the solid fluorine compound resin such as tetrafluoroethylene resin.

For the light-sensitive material, adhesion prevention, improvement of sliding property,
A matting agent can be used for the purpose of making a matte surface or the like. Examples of the matting agent include silicon dioxide, polyolefin and polymethacrylate.
No. 29, benzoguanamine resin beads, polycarbonate resin beads, and AS resin beads.
No. 952. In addition, the compounds described in the above Research Disclosure can be used. These matting agents can be added not only to the uppermost layer (protective layer) but also to the lower layer as needed. In addition, the constituent layers of the light-sensitive material may contain a heat solvent, an antifoaming agent, a germicide / antibacterial agent, colloidal silica, and the like. Specific examples of these additives are described in JP-A-61-88256, pages (26) to (32), JP-A-3-11,338, and JP-B-2-51,496.

In the present invention, an image formation accelerator can be used in the light-sensitive material. The image formation accelerator has a function of accelerating a redox reaction between a silver salt oxidizing agent and a reducing agent, accelerating a dye formation reaction, and the like. From a physicochemical function, a base or a base precursor, a nucleophilic compound, It is classified into a boiling organic solvent (oil), a thermal solvent, a surfactant, a compound having an interaction with silver or silver ions, and the like. However, these substance groups generally have a composite function, and usually have some of the above-mentioned accelerating effects together. Details thereof are described in US Pat. No. 4,678,739, columns 38 to 40.

In the present invention, in the photothermographic material, various development stoppers can be used for the purpose of always obtaining a constant image with respect to fluctuations in processing temperature and processing time during development. The term "development terminating agent" as used herein refers to a compound that immediately neutralizes or reacts with a base to reduce the concentration of the base in the film to stop the development after proper development, or inhibits development by interacting with silver and a silver salt. Compound. Specific examples include an acid precursor that releases an acid when heated, an electrophilic compound that causes a substitution reaction with a coexisting base when heated, or a nitrogen-containing heterocyclic compound, a mercapto compound, and a precursor thereof. For further details, see JP-A-62-253159 (3.
It is described on pages 1) to (32).

As a method for exposing and recording an image on a light-sensitive material, for example, a method of directly photographing a landscape or a person by using a camera, a method of exposing through a reversal film or a negative film by using a printer or an enlarger, A method of scanning and exposing an original image through a slit or the like using an exposure device of a copying machine, a light emitting diode for image information via an electric signal, various lasers (laser diode,
A method of performing scanning exposure by emitting light from a gas laser or the like (Japanese Unexamined Patent Application Publication No. 2-129625, 5-176144).
No. 5, No. 5-199372, No. 6-127021, etc.), image information is output to an image display device such as a CRT, a liquid crystal display, an electroluminescence display, a plasma display, or directly or through an optical system. Exposure method.

As a light source for recording an image on a photosensitive material,
As described above, natural light, tungsten lamps, light emitting diodes, laser light sources, CRT light sources, etc., US Pat. No. 4,500,626, column 56, JP-A-2-53,37.
The light sources and exposure methods described in No. 8 and No. 2-54,672 can be used. Also, image exposure can be performed using a wavelength conversion element in which a non-linear optical material and a coherent light source such as laser light are combined. Here, the non-linear optical material is a material capable of expressing nonlinearity between polarization and electric field that appears when a strong optical electric field such as laser light is applied, and is composed of lithium niobate, potassium dihydrogen phosphate (K
DP), lithium iodate, BaB ₂ O _{4 and} other inorganic compounds, urea derivatives, nitroaniline derivatives,
For example, nitropyridine-N-oxide derivatives such as 3-methyl-4-nitropyridine-N-oxide (POM), JP-A-61-53462 and JP-A-62-121032.
The compounds described in (1) are preferably used. As a form of the wavelength conversion element, a single crystal optical waveguide type, a fiber type and the like are known, and any of them is useful. In addition, the image information includes an image signal obtained from a video camera, an electronic still camera, and the like, and the Nippon Television Signal Standard (NTS).
A television signal represented by C), an image signal obtained by dividing an original image into a large number of pixels such as a scanner, and an image signal created by using a computer represented by CG and CAD can be used.

When the photosensitive material of the present invention is processed by heat development, it may have a form having a conductive heating element layer as a heating means for heat development. In this case, the heat generating element described in JP-A-61-145544 can be used. The heating temperature in the thermal development process is about 80 ° C to 18 ° C.
0 ° C. and the heating time is 0.1 seconds to 60 seconds.

As a heating method in the developing step, a heated block or plate is brought into contact, or a heating plate, a hot presser, a heating roller, a heating drum, a halogen lamp heater, an infrared or far infrared lamp heater or the like is brought into contact. Alternatively, there is a method of passing through a high temperature atmosphere. A method of superposing a photosensitive material and a processing sheet is described in JP-A-62-253,159 and JP-A-61-147,244.
(27) can be applied.

The effects of the present invention will be described in detail below with reference to examples.

[0087]

【Example】

<Method of preparing a photosensitive silver halide emulsion> A well-stirred aqueous gelatin solution (inert gelatin 3 in 1000 ml of water)
0 g, potassium bromide 2 g) and ammonia
Add ammonium nitrate as a solvent and keep the temperature at 75 ° C.
To this, 1,000 ml of an aqueous solution containing 1 mol of silver nitrate and 1000 ml of an aqueous solution containing 1 mol of potassium bromide and 0.03 mol of potassium iodide were simultaneously added over 78 minutes. After washing with water and desalting, the mixture was redispersed by adding inert gelatin to obtain a sphere equivalent diameter of 0.1.
A silver iodobromide emulsion having an iodine content of 3 .mu.% Of 76 .mu.m was prepared. Equivalent sphere diameter is model TA of Coulter Counter
Measured at -II. Potassium thiocyanate, chloroauric acid and sodium thiosulfate were added to the above emulsion at 56 ° C. for optimum chemical sensitization. Sensitizing dyes corresponding to the respective spectral sensitivities were added to the emulsion at the time of preparing the coating solution to give color sensitivity.

<Preparation Method of Zinc Hydroxide Dispersion> 31 g of zinc hydroxide powder having a primary particle size of 0.2 μm,
1.6 g of carboxymethylcellulose, 0.4 g of sodium polyacrylate, 8.5 g of lime-treated ossein gelatin, and 158.5 ml of water were mixed as a dispersant, and the mixture was dispersed in a mill using glass beads for 1 hour. After the dispersion, the glass beads were filtered off, and a dispersion 188 of zinc hydroxide was obtained.
g was obtained.

<Preparation Method of Emulsified Dispersion of Coupler> Table 1
The oil phase component and the water phase component having the compositions shown in
Make a uniform solution at 0 ° C. The oil phase component and the aqueous phase component were combined, and placed in a 1-liter stainless steel container at 10,000 rpm with a dissolver equipped with a 5 cm diameter disperser.
Dispersed for 0 minutes. To this, warm water in the amount shown in Table 1 was added as post-water and mixed at 2000 rpm for 10 minutes. Thus, an emulsified dispersion of couplers of three colors of cyan, magenta and yellow was prepared.

[0090]

[Table 1]

[0091]

Embedded image

[0092]

Embedded image

Using the materials thus obtained, a heat developable color photosensitive material 101 having a multilayer structure shown in Tables 2 and 3 was produced.

[0094]

[Table 2]

[0095]

[Table 3]

[0096]

Embedded image

[0097]

[Chemical formula 26]

[0098]

Embedded image

Further, a processing material R-1 having the contents shown in Tables 4, 5 and 6 was prepared.

[0100]

[Table 4]

[0101]

[Table 5]

[0102]

[Table 6]

[0103]

Embedded image

[0104]

[Chemical 29]

Next, as shown in Table 7, except that the yellow coupler of the fifth layer and the developing agent were changed, 10
The photosensitive materials 102 to 120 having exactly the same composition as in Example No. 1 were produced. Photosensitive materials 101 to 12 thus produced
It was exposed for 0.01 second at 2500 lux through B, G, and R filters whose densities were continuously changed to 0. 15 ml / m ² of 40 ° C. hot water was applied to the exposed light-sensitive material surface, and the treated sheet and each other were superposed on each other, and then heat-developed at 83 ° C. for 30 seconds using a heat drum. When the image receiving material is peeled off after processing, it corresponds to the filter exposed on the photosensitive material side,
Cyan, magenta and yellow color images were clearly obtained. Immediately after processing, the highest density portion (Dmax) and the lowest density portion (Dmin) of the yellow dye image in the B-exposed area of this sample
Table 8 shows the results of the measurement by the X-rite densitometer.

[0106]

[Table 7]

[0107]

Embedded image

[0108]

[Chemical 31]

[0109]

[Table 8]

The results of Table 8 can be summarized as follows. First, a sample using the yellow coupler of the comparative example and the developing agent (101
.About.108), almost no dye image can be obtained. On the other hand, in the samples (109 to 114) using the yellow coupler of the present invention, the yellow dye density is increased.
Furthermore, in the samples (115 to 120) using the yellow coupler of the present invention in combination with the developing agent of the present invention,
Further, it can be seen that an image excellent in discrimination is obtained. From the above, the effect of the present invention is clear.

[0111]

The discrimination can be improved without adversely affecting the photographic properties.

Claims (5)

[Claims] 1. A heat-developable color light-sensitive material having a developing agent capable of forming a dye by a coupling reaction of at least a light-sensitive silver halide, a binder, a coupler, and an oxidant with the coupler on a support. A heat-developable color light-sensitive material characterized by containing at least one compound represented by the following general formula [1] or [2] as a coupler. General formula [1] General formula [2] In the formula, R ₁ represents a hydrogen atom or an alkyl group, and the carbon number thereof is 8 or less. Z ₁ represents an alicyclic hydrocarbon group having 3 to 6 carbon atoms. R ₂ is a cyano group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylcarbamoyl group, an arylcarbamoyl group, an alkylcarbonyl group, an arylcarbonyl group, an alkylsulfonyl group, an arylsulfonyl group, an alkylsulfamoyl group, an arylsulfamoyl group. Alternatively, it represents a heterocyclic group. Z ₂ represents an atomic group capable of forming a nitrogen-containing heterocyclic group. Y represents a hydrogen atom or a group which can be eliminated by a coupling reaction with an oxidized developing agent. 2. The photothermographic material according to claim 1, wherein Y in the general formulas [1] and [2] is a hydrogen atom and R ₂ is an arylcarbamoyl group. 3. The heat-developable color photosensitive material according to claim 1, wherein the alicyclic hydrocarbon group formed by Z ₁ in the general formula [1] is a cyclopropyl group. 4. The developing agent is a compound represented by the following general formula [3], wherein the developing agent is 1, 2, or 3.
The heat-developable color light-sensitive material as described above. General formula [3] In the formula, R _{3 to} R ₆ represent a substituent, and a group having a total Hammett substituent constant (σ value) of 0 or more. R ₇ ~ R
₁₁ represents a substituent, and represents a group in which the sum of Hammett's substituent constants (σ value) is 0 or less. R ₇ and / or R ₁₁
Has a substituent other than a hydrogen atom. R ₇ and R ₈ or R ₁₀ and R ₁₁ may combine with each other to form a ring. 5. The R _{3 to} R ₆ has a ballast group having 8 or more carbon atoms, or the total number of carbon atoms of R _{7 to} R ₁₁ is 8 or more. The heat-developable color light-sensitive material as described above.