JPH01177034A - Thermodevelopment photosensitive material and its image receiving material - Google Patents

Abstract

PURPOSE:To promote the development of the title material, and to improve the shelf-life of an image by incorporating a specified compd. in at least one layer of photographic constituting layers. CONSTITUTION:The compd. shown by formula I is incorporated in at least one layer of the photographic constituting layers. In formula I, Z is a nonmetal atomic group necessary for forming a 5 or 6 membered heterocyclic ring, and when the group Z is the 5-membered ring, (n) is an integer of 1-4, and when the group Z is the 6-membered ring, (n) is an integer of 1-5. R1 is a substituting group, and when (n) is >=2, R1 may be the same or the different with each other, but, at least one of the group R1 is -X-R2 group, X is -COO- or -NHCONH- group, etc., R2 is hydrogen atom or alkyl group, etc. Thus, the development of the photosensitive material is promoted, and the image having the good shelf-life can be obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a heat-developable photosensitive material, that is, a photosensitive material from which an image is obtained by developing by heat treatment. In particular, it relates to a heat-developable photosensitive material that accelerates development and improves storage stability.

[Background of the invention]

A photosensitive material (thermally developable photosensitive material) that can easily and quickly form an image by carrying out a dry process using heat in the development process is well known. Publication No. 43-4924, "Fundamentals of Photographic Engineering", Gensho Photography Edition (Published by Corona Publishing in 1879)
pages 553-555, and Research Disclosure magazine June 1978 issue, pages 9-15 (RD-170
29) etc.

There are two types of heat-developable photosensitive materials: those that produce black-and-white images and those that produce color images. In recent years, in particular, attempts have been made to develop heat-developable color photosensitive materials that produce color images using various dye-providing substances.

There are various methods for heat-developable color photosensitive materials, such as a method in which a color image is obtained by releasing or forming a diffusible dye through heat development and then transferring the dye (
Although this method (hereinafter referred to as a transfer method) requires an image receiving member for transfer, it is superior in terms of image stability and clarity, and processing simplicity and speed. This transfer method heat-developable color photosensitive material and image forming method are described in, for example, JP-A-5-9-12431 and JP-A-59-159159.
No. 59-181345, No. 59-229556, No. 60-2950, No. 61-52643, No. 61-6
No. 1158, No. 61-61157, No. 59-1805
No. 50, No. 61-132952, No. 61-13295
No. 2 publications, U.S. Patent Nos. 4,595,652 and 4
, No. 590.154 and the specifications of No. 4,584 and No. 267.

However, in the heat-developable photosensitive materials that have been developed or proposed, although development is completed by a simple means of heat treatment, it may not always be possible to obtain images with sufficient density.

One way to obtain sufficient image density is to increase the developing temperature.
Alternatively, there are techniques such as extending the development time or adding a compound that has a development accelerating effect during thermal development.

However, no matter which technique is used, there are often adverse effects such as an increase in fog.

On the other hand, conventional photothermographic materials have a problem in that the storage stability of the obtained image (in the case of a transfer method, the image transferred to an image receiving member) is not necessarily satisfactory.

[Purpose of the invention]

An object of the present invention is to solve the problems of the prior art. That is, the object of the present invention is to be able to accelerate development;
It is an object of the present invention to provide a heat-developable photosensitive material and an image-receiving member that can obtain a sufficient maximum density in a short time and have good storage stability of the obtained images.

[Structure of the invention]

As a result of intensive research in order to achieve the above object, the present inventors have discovered that a photothermographic material having a photographic constituent layer on a support which preferably contains at least a photosensitive silver halide, a reducing agent, and a binder. It has been found that the above-mentioned problems of developability and storage stability can be solved by a heat-developable photosensitive material characterized in that at least one layer thereof contains a compound represented by the following general formula [I]. This heat-developable photosensitive material can exhibit its effects both in the case of a transfer method and in the case of a non-transfer method.

Furthermore, an image receiving member having an image receiving layer that receives an image by transferring a dye from a photosensitive material, which is characterized in that the image receiving layer contains a compound represented by the following general formula [I], meets the above object. I discovered that. This image-receiving member can provide the effects of both acceleration of development and storage stability of images, regardless of whether the photosensitive material is a heat-developable photosensitive material having the above structure or not.

General formula (1) is as follows.

"\N==' Z represents a group of nonmetallic atoms necessary to form a 5- or 6-membered heterocycle, and when Z forms a 5-membered ring, n is 1 to 4.
and when Z forms a 6-membered ring, n is an integer of 1 to 5. Preferably, the two carbon atoms adjacent to the nitrogen atom of -maximum CI) are left unplaced! Mulberry is better.
Preferably, the heterocycle formed by Z (hereinafter sometimes referred to as "mother nucleus") is a pyridine nucleus. It is more preferable that the mother nucleus is a pyridine nucleus and that two carbon atoms adjacent to the nitrogen atom of the mother nucleus are unsubstituted.

RI represents a hydrogen atom or a substituent, and when n is 2 or more, R9 may be the same or different. However, at least one of R1 is as follows - Maximum C
I+).

- maximum (II) -X-R.

X is -COO-, -NHCON)I-1-CONH-1
-NHCO-1-CO-1-O-CO-1-SO3-,
-5O2-, -0-, -Ntl-1-S (hNH-), and R2 represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, or a heterocycle.

It is particularly preferable that X is either -COO- or -CONH-1-8O1-.

When R2 is a hydrogen atom, it also includes a salt form.

Next, typical specific examples of the compound represented by the general formula (I) (hereinafter appropriately abbreviated as "compound of the present invention", etc.) will be shown. However, as a matter of course, it is not limited to the following.

Exemplary compound (25) c2)1. (26) Among the above-mentioned exemplified compounds, there are many commercially available compounds listed under -i. Furthermore, the compounds of the present invention can be easily synthesized by those skilled in the art according to conventional synthesis methods.

An example of the method for synthesizing the compound of the present invention is as follows. The above-mentioned exemplary compound (39) is shown below.

Synthesis example: Exemplary compound (39) 9.4 g of 4-aminopyridine was mixed with 20 m of triethylamine.
Dissolved in a mixed solution of Z and acetonitrile 170mZ,
α-(2,5-di-t-pentylphenoxy) at room temperature
Acetyl chloride 31.5g acetonitrile (10
0 m/) solution was added dropwise (heat generation was observed).

After the dropwise addition, the mixture was heated for 1 hour, and the reaction solution was poured into 200ml of water, neutralized with diluted hydrochloric acid, and then extracted with ethyl acetate. The extract was concentrated to dryness, and the resulting solid was recrystallized from acetonitrile.
24.2 g of the target product was obtained. The compound was identified by FD-Mass spectrum.

When the compound of the present invention is contained in a heat-developable photosensitive material,
It can be contained in both the photosensitive emulsion layer and the non-photosensitive layer. A preferable addition amount is 0.0000000000000000000000000 per 1M of the light-sensitive material.
The range is from 0.01 g to 5 g, particularly preferably from 0.05 g to 2 g.

Further, the addition method may be by dissolving it in an appropriate solvent such as water or methanol, or adding it by emulsifying and dispersing it with a high boiling point organic solvent together with other hydrophobic compounds as necessary. .

Further, when the compound of the present invention is contained in the image receiving member, it is added in an appropriately selected amount per image receiving member 1, preferably in the range of 0.02 g to Log, particularly preferably in the range of 0.1 g to 2 g.

When the image-receiving layer is made of a hydrophilic binder, the addition method may be the same as in the case of the photosensitive material described above, or when the image-receiving layer is hydrophobic, it is added by dissolving it in a suitable hydrophobic solvent. be able to.

(T) The heat-developable photosensitive material of the present invention can be embodied as a black-and-white photosensitive material or as a color photosensitive material. When it is made into a color photosensitive material, a dye-providing substance is used.

When the present invention is applied to a color photosensitive material, examples of the dye-providing substance include JP-A-62-44737 and JP-A-62-44737;
0-271117 and Japanese Patent Application No. 61-11563, such as the leuco dyes described in U.S. Pat. No. 475,441, or e.g. U.S. Pat. No. 4,235,957. Although an azo dye used in the heat-developable dye bleaching method described in et al. can be used as the dye-donating substance, it is more preferable to use a diffusible dye-donating substance that forms or releases a diffusible dye, and particularly It is preferable to use a compound that forms a diffusible dye through a coupling reaction.

Diffusible dye-providing substances that can be used in the present invention will be explained below. A diffusive dye-donor substance may be any substance that participates in the reduction reaction of the optically photosensitive silver halide and/or the optional organic silver salt and is capable of forming or releasing a diffusible dye as a function of that reaction. Good luck,
Depending on the reaction mode, negative-working dye-donors that act on a positive function (i.e., those that form a negative dye image when using negative-working silver halide) and positive dye-donors that act on a negative function. dye-donors (that is, those that form a positive dye image when negative-working silver halide is used).

As a negative dye-donating substance, 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. 59-159159, No. 59-2
Examples thereof include coupled dye-releasing compounds described in specifications such as No. 31540.

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

General formula (A) Cp-←Jmo-(B) In the formula, Cp represents a monolithic group that can react with the oxidized form of the reducing agent (campling reaction) to form a diffusible dye, and B represents Represents a ballast group. Here, the ballast group is a group that substantially prevents the dye-providing substance from diffusing during thermal development, and is a group that exhibits this effect depending on its molecular properties.
sulfo group, etc.), and groups that exhibit their effects depending on their size (groups with a large number of carbon atoms, etc.). The coupler residues represented by C and p preferably have a molecular weight of 700 or less, more preferably 500 or less, in order to improve the diffusibility of the dye formed.

The ballast group is preferably a group having 8 or more carbon atoms, more preferably 12 or more carbon atoms. Also,
When the image-receiving layer of the image-receiving member is made of a hydrophobic binder, the ballast group may be a sulfo group, and in this case, the above-mentioned alkyl group having 8 or more carbon atoms (preferably 12 or more) and a sulfo group may be used. A group containing a group is more preferable, and a group containing a polymer chain is most preferable.

The coupled dye-forming compound having a group that is a polymer chain is preferably one having a polymer chain having a repeating unit derived from a monomer represented by -maximum (0) as the above-mentioned group.

- maximum (0) % formula % () In the formula, cp and J have the same meaning as defined in general formula (a), Y represents an alkylene group, arylene group or aralkylene group, and l is O or 1 , Z 11 is 2
represents a valent organic group, and L represents an ethylenically unsaturated group or a group having an ethylenically unsaturated group.

Specific examples of coupling dye-forming compounds represented by general formulas (a) and (b) include JP-A-59-124339
No. 59-181345, No. 60-2950, JP-A-61-57943, JP-A No. 61-59336, U.S. Pat.
No. 4.656.124, and in particular, US Pat. No. 4.656.124,
U.S. Patent Nos. 4,631,251 and 4,650.74
The polymer type dye-providing substances described in each specification of No. 8 are preferred.

As a positive dye-donating substance, for example, JP-A-59-
Dye developer compounds described in publications such as No. 55430 and No. 59-165054, for example, JP-A-59-15444
Compounds that release diffusible dyes by intramolecular nucleophilic reaction described in publications such as No. 5 and No. 59-766954, cobalt complex compounds described in publications such as JP-A-59-116655, or e.g. There are compounds that lose their dye-releasing ability when oxidized, as described in publications such as No. 59-124327 and No. 59-152440.

The residue of the diffusible dye in the dye-providing substance used in the present invention preferably has a molecular weight of 800 or less, more preferably 600 or less, in order to improve the diffusibility of the dye. Examples include residues such as azomethine dyes, anthraquinone dyes, naphthoquinone dyes, styryl dyes, nitro dyes, quinoline dyes, carbonyl dyes, and phthalocyanine dyes. These dye residues may be in a temporarily shortened form that can restore color during thermal development or transfer. In addition, these dye residues are used for the purpose of improving the light resistance of images, for example, in JP-A-59-48765 and JP-A-59-48765.
A chelatable dye residue described in No. 124337 is also a preferred form.

These dye-donating materials may be used alone or in combination of two or more. 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 constituent layer of the light-sensitive material of the present invention is a single layer or a multilayer of two or more types. For example, the amount used is 0.005 to 50 g, preferably 0.00 g to 50 g per 1 i, although it may be determined accordingly.
1 g to 10 g can be used.

The dye-providing substance used in the present invention can be incorporated into the photographic constituent layer of the heat-developable light-sensitive material using any method. , tricresyl phosphate, etc.) and then subjected to ultrasonic dispersion, or dissolved in an alkaline aqueous solution (e.g., 10% sodium hydroxide aqueous solution, etc.) and then treated with an acid (e.g., citric acid or nitric acid, etc.). It can be used after being neutralized, or after being dispersed in an aqueous solution of a suitable polymer (eg, gelatin, polyvinyl butyral, polyvinylpyrrolidone, etc.).

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 field, such as a single jet method. According to a preferred embodiment, silver halide emulsions having shelled silver halide grains can be used.

Furthermore, 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, its shape is cubic, spherical, octahedral, dodecahedron,
It can be used whether it has a clear crystal habit such as a tetradecahedron or not. This type of silver halide is described in JP-A No. 60-21.5948.

Also, for example, JP-A-58-111933 No. 5, JP-A No. 58-111933;
No. 111934, No. 58-108526, Research
As described in Disclosure No. 22534, etc., the particle has two parallel crystal planes, and each of these crystal planes has a larger area than other single crystals of this particle, and its aspect ratio That is, it is also possible to use a silver halide emulsion containing tabular silver halide grains having a grain diameter to thickness ratio of 5:1 or more.

Further, in the present invention, a silver halide emulsion containing internal latent image type silver halide grains whose surfaces have not been fogged in advance can be used. For internal latent image type silver halide whose surface is not prefogged, for example, U.S. Pat.
, No. 592,250, No. 3,206.313, No. 3.
317.322, 3,511,622, 3, 4
No. 47.927, No. 3,761,266, No. 3,70
No. 3,584, No. 3,736.140, etc., and as stated in the above specifications, the sensitivity inside the grain is higher than the sensitivity on the surface of the silver halide grain. It is a silver halide grain with a high Also, U.S. Patent Nos. 3.27L157, 3.447.927, and 3.
, 531,291, or dopants as described in U.S. Pat. No. 3,761,276. A silver halide emulsion in which the grain surface of silver halide grains 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
These include silver halide emulsions described in No. 5-127549.

The silver halide in the above-mentioned photosensitive emulsion may have coarse or fine grains, but the preferred grain size is about 0.05 μm to about 2 μm, more preferably about 0.08 μm. ~0.5 μm.

In the present invention, as another method for preparing silver halide for light-sensitive materials, it is also possible to allow a photosensitive silver salt-forming component to coexist with an organic silver salt described below, and to form a photosensitive silver halide in a part of the organic silver salt. .

These photosensitive silver halides and photosensitive root salt-forming components can be used in combination in various manners, and the amounts used are -1.25 to 1.25 cm per layer per support. (In contrast, it is preferably 0.01 g to 50 g, more preferably 0.2 to 10 g.

The silver halide grains are preferably sensitized using a chemical sensitizer. Chemical sensitizers that can be preferably used include noble metal sensitizers such as potassium chloroaurate, potassium chloroplatinate, and iridium hexachloride; active gelatin; unstable sulfur compounds such as sodium thiosulfate; Examples include reducing compounds such as tin, thiourea dioxide, polyamines, and hydrazinium salts.

Each of the photosensitive silver halide emulsions of the heat-developable photosensitive material of the present invention can be spectral sensitized using known photographic spectral sensitizing dyes such as cyanines, merocyanines, oxonols and the like.

The amount of these sensitizing dyes to be added is from 1 x 10-4 mol per mol of photosensitive silver halide or silver halide forming component.
It is 1 mole. More preferably, ■×10−4 to lXl
0-' mole.

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 when silver halide grains are formed, when soluble salts are removed, before the start of chemical sensitization, during chemical sensitization, or after the end of chemical sensitization.

In the heat-developable photosensitive material of the present invention, various organic silver salts can be used, 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-53-4921 and JP-A-49-52.
No. 626, No. 52-141222, No. 53-3622
No. 4 and No. 53-37626, No. 52-14122
No. 2, No. 53-36224 and No. 53-37610
Publications such as No. 3 and U.S. Patent No. 3330.633,
Same No. 3.794,496, Same No. 4.105,451
Silver salts of long-chain aliphatic carboxylic acids and silver salts of carboxylic acids having a hetero-U ring, such as silver laurate, silver myristate, silver palmitate, and stearin, as described in the specifications of silver acid, silver arachidonic acid, silver behenate, α
silver aromatic carboxylates, such as silver -(1-phenyltetrazolethio)acetate, such as silver benzoate, silver phthalate, etc.
JP 44-26582, JP 45-12700, JP 45-18416, JP 45-22185, JP 5
2-137321, JP-A-58-118638, JP-A-58-118639, U.S. Patent No. 4,123,274
There are silver salts of imino groups described in various publications.

Other silver complex compounds with a stability constant of 4.5 to 10.0 as described in JP-A No. 52-31728, and imizolithion as described in U.S. Pat. No. 4,168,980. Silver salt etc. are used.

Among the above organic silver salts, imino group silver salts are preferred;
Particularly preferred are silver salts of benzotriazole derivatives, more preferably 5-methylbenzotriazole and its derivatives, sulfobenzotriazole and its i-form, and N-alkylsulfamoylhensotriazole and its derivatives.

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 means include, but are not limited to, ball mills, sand mills, colloid mills, vibration mills, and the like.

In addition, as a method for preparing organic silver salts, a method is used for boat fishing by dissolving and mixing silver nitrate and raw material organic compounds in water or an organic solvent, but if necessary, a binder may be added or hydroxylated. It is also effective to add an alkali such as sodium to promote dissolution of organic compounds, or to use an ammoniacal silver nitrate solution.

The amount of the organic silver salt used is generally preferably 0.01 to 500 moles, more preferably 0.1 to 100 moles, per mole of photosensitive silver halide. More preferably 0
．． It is 3 to 30 moles.

Reducing agent used in the photothermographic material of the present invention (reducing agent precursor is also included in the reducing agent herein)
Those commonly used in the field of heat-developable photosensitive 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') N [112146,
Same floor 15108, same floor 15127 and JP-A-56-2
No. 7132, U.S. Pat. No. 3,342,599. issue,
No. 3.719.492 Specifications, JP-A-53-13
p-phenylenediamine-based and p-aminophenol-based developing agents, phosphoramidophenol-based, sulfonamide aniline-based developing agents, and hydrazone-based color developing agents described in publications such as No. 5628 and No. 57-79035, and the like. precursors, or phenols,
Sulfonamide phenols, or polyhydroxybenzenes, naphthols, hydroxybinaphthyls and methylene bisnaphthols, methylene bisphenols, ascorbic acid, 3-pyrazolidones, and pyrazolones can be used.

As a particularly preferable reducing agent, JP-A-56-146133
N-(p-N
.

Examples include N-dialkyl)aminophenylsulfamate.

Two or more types of the above-mentioned 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. However, it is usually preferably in the range of 0.1 to 100 mol, preferably 0.2 to 20 mol, per 1 mol of photosensitive silver halide.

Furthermore, binders that can be used in the heat-developable photosensitive material of the present invention include gelatin derivatives such as polyvinyl butyral, polyvinyl acetate, ethyl cellulose, polymethyl methacrylate, cellulose acetate butyrate, polyvinyl alcohol, polyvinyl pyrrolidone, gelatin, and phthalated gelatin. , cellulose derivatives, proteins,
There are synthetic or natural polymeric substances such as starch and gum arabic, and one or more of these can be used in combination. In particular, it is preferable to use gelatin or a derivative thereof together with a wood-loving polymer such as polyvinylpyrrolidone or polyvinyl alcohol, and more preferably to use a mixed binder of gelatin and polyvinylpyrrolidone described in JP-A-59-229556. It is to use.

The preferred amount of binder used is usually 0.05 g to 50 g per 1 support, more preferably 0.1 g.
~10g.

In addition, the binder is 0.1% per 1g of the dye-providing substance.
~Log is preferably used, more preferably 0.2
It is 5 to 4 g.

The heat-developable photosensitive material of the present invention can be obtained by forming a photographic constituent layer on a support, and examples of the support that can be used here include polyethylene film, cellulose acetate film, polyethylene terephthalate film, etc. Synthetic plastic films such as polyvinyl chloride, paper supports such as photographic base paper, printing paper, baryta paper, and resin coated paper, and electron beam curable resin compositions coated and cured on these supports. Examples include supports.

It is preferable that various heat solvents be added to the photothermographic material and/or the image receiving member of the present invention.

A thermal solvent is a compound that promotes thermal development and/or thermal transfer. These compounds include, for example, U.S. Pat. No. 3,347,675. No. 3,667.9.59, (RD Research Disclosure) Arashi 17643
(X11), JP-A-59-229556, JP-A No. 59-6
No. 8730, No. 59-84236, No. 60-1912
No. 51, No. 60-232547, No. 60-14241
No. 61-52643, patent application No. 60-218
No. 768, No. 60-181965, No. 60-1846
No. 37, etc., U.S. Patent No. 3,438,776, U.S. Patent No. 3.6
66477, 3,667.959 specifications, JP-A-51-19525, JP-A-53-24829, JP-A-53
-60223, 58-118640, 53-1
Examples of organic compounds having polarity such as those described in Japanese Patent No. 9825 include urea derivatives (for example, dimethylurea, diethylurea, phenylurea, etc.), which are particularly useful in carrying out the present invention. Amide derivatives (e.g., acetamide, benzamide, p-)ylamide, p-butoxybenzamide, etc.), sulfonamide derivatives (e.g., evabenzenesulfonamide, α-toluenesulfonamide, etc.), polyhydric alcohols (e.g., 1
．． 5-bentanediol, 1,6-hexanediol,
1. '2-cyclohexanediol, pentaerythritol, trimethylolethane, etc.), or polyethylene glycols.

As the above-mentioned thermal solvent, a water-insoluble solid thermal solvent is more preferably used. Here, the water-insoluble solid thermal solvent is a compound that is solid at room temperature but becomes liquid at high temperatures (preferably 60°C or higher), and the inorganic/organic ratio ("Organic Conceptual Diagram" by Yoshio Koda, Sankyo) Publishing (Kikki, 1984) is 0.5-3
．． 0, preferably in the range of 0.7 to 2.5.

Specific examples of the above-mentioned water-soluble heat solvent include, for example,
It is described in No.-278331 and No. 60-280824.

Examples of the layer to which a heat solvent is added include a photosensitive silver halide emulsion layer, an intermediate layer, a protective layer, an image receiving layer of an image receiving member, etc., and the heat solvent is added to each layer so as to obtain an effect depending on each layer.

The preferred amount of the heat solvent added is usually 10% to 500% by weight, more preferably 30% to 200% by weight of the binder amount.
Weight%.

The water-insoluble hot solvent preferably used in the present invention is
Like the organic silver salt described above, it is preferable to emulsify and disperse it in an aqueous colloid solution using a sand mill, ball mill, etc. In this case, the organic silver salt and the thermal solvent should be dispersed simultaneously in the same dispersion liquid. You can also do it.

The photothermographic material of the present invention may contain various additives in addition to the above-mentioned components, if necessary.

What is known as a toning agent in heat-developable light-sensitive materials may be added to the heat-developable light-sensitive material of the present invention as a development accelerator. As a color toning agent, for example, JP-A-46-4
No. 928, No. 46-6077, No. 49-5019, No. 49-5020, No. 49-95215, No. 49
-107727, 50-2524, 50-67
No. 132, No. 50-67641, No. 50-11421
No. 7, No. 52-33722, No. 52-99813,
No. 53-1020, No. 53-55115, No. 53-
No. 76020, No. 53-125014, No. 54-15
No. 6523, No. 54-1565324, No. 54-15
No. 6525, No. 54-156526, No. 55-406
Publications such as No. 0, No. 55-4061, No. 55-32015, and West German Patent No. 2,140,406, No. 2
, 141,063, 2,220,618, US Pat. No. 3,847,612, US Pat. No. 57-207244, No. 57-207245,
There are compounds described in various publications such as No. 58-1896328 and No. 58-193541.

Other development accelerators include compounds described in JP-A-59-177550 and JP-A-59-111636.

Further, development accelerator releasing compounds described in Japanese Patent Application No. 59-280881 can also be used.

Antifoggants include, for example, U.S. Pat. No. 3,645;
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
Mercapto compound releasing compound described in Publication No. 725,
49-125016, the carboxylic acid lithium salt described in 51-47419, the specification of British Patent No. L455,271, and JP-A-50-101,019. The oxidizing agent described in 53
Sulfinic acids or thiosulfonic acids described in Japanese Patent Publication No. 19825, 2-thiouracils described in Japanese Publication No. 51-3223, simple sulfur described in Japanese Publication No. 51-26019, No. 51-42529, No. 51-81124, 5
Disulfide and polysulfide compounds described in Publication No. 5-93149, rosins or diterpenes described in Publication No. 51-57435, polymer acids having free carboxyl groups or sulfonic acid groups described in Publication No. 51-104338, US Pat. Thiazolinthione described in Patent No. 4,138,265, JP-A-54-5182
1,2,4-) riazole or 5-mercapto-1,2,4-) riazole described in Publication No. 1, U.S. Pat.
Thiosulfinate esters described in No. 3, No. 55-1
2゜3.4-thiatriazoles described in Publication No. 42331, No. 59-46641, No. 59-57233
No., dihalogen compounds or trihalogen compounds described in Publication No. 59-57234, and furthermore, No. 59-111.
Thiol compound described in Publication No. 636, No. 60-198
Hydroquinone derivatives described in Publication No. 540, 60-
Examples include the combined use of a hydroquinone derivative and a benzotriazole derivative described in Japanese Patent No. 227255.

Further particularly preferred antifoggants include the inhibitors having hydrophilic groups described in Japanese Patent Application No. 60-218169, the polymer inhibitors described in Japanese Patent Application No. 60-262177, and the polymer inhibitors described in Japanese Patent Application No. 60-262177. Examples include the inhibitor compound having a ballast group described in No. 60-263564.

Additionally, inorganic or organic bases or base precursors can be added. Examples of base precursors include compounds that decarbonize upon heating and release basic substances (e.g., guanidinium trichloroacetate), compounds that decompose through reactions such as intramolecular nucleus displacement reactions and release amine molecules, and the like. For example, Japanese Patent Application Publication No. 56-130745, Japanese Patent Application Publication No. 56-132332, British Patent No. 2.079.
No. 480, US Pat.
Examples include base releasing agents described in Japanese Patent No. 59-195237 and the like.

In addition, various additives used in heat-developable photosensitive materials as necessary, such as antihalation dyes, fluorescent brighteners, hardeners, antistatic agents, plasticizers, spreading agents, matting agents, and surfactants. , anti-fading agents, etc., specifically RD (
Research Disclosure) Magazine Vol.1.170.1
June 978 No. N1117029, patent application 1986-276
It is described in No. 615, etc.

The heat-developable photosensitive material of the present invention contains (a) a photosensitive silver halide, (b) a reducing agent, a (Cl binder), and in the case of a color photosensitive material, an fd1 dye-providing substance.

Furthermore, if necessary, it is preferable to contain organic silver (1141).These may basically be contained in one heat-developable photosensitive layer, but it is not necessarily necessary to contain them in a single photographic constituent layer. For example, the heat-developable photosensitive layer is divided into two layers, the components (a), (bl, fc), and (e) are contained in one of the heat-developable photosensitive layers, and the other layer adjacent to this photosensitive layer is The dye-providing substance (d) may be contained in this layer, or may be contained in two or more constituent layers as long as they are in a state where they can react with each other.

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) seismic intensity layer, and a low-density layer.

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

A magenta dye is used in the layer, and a cyan dye is used in the red-sensitive layer, but the invention is not limited thereto. For example, when combining a cyan dye in a blue-sensitive layer, a magenta dye in a green-sensitive layer, and a yellow dye in a red-sensitive layer, or a cyan dye in a blue-sensitive layer, a yellow dye in a green-sensitive layer, and a red-sensitive layer, It is also possible to adopt a structure in which a magenta dye is combined in the layer. It is also possible to combine a near-infrared sensitive layer.

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

In addition to the heat-developable photosensitive layer, the heat-developable photosensitive material of the present invention can be provided with non-photosensitive layers such as an undercoat layer, an intermediate layer, a protective layer, a filter layer, a backing layer, and a ff1ll release layer. To coat the heat-developable photosensitive layer and these non-photosensitive layers on the support, a method similar to that used for coating and preparing general silver halide photosensitive materials can be applied.

The heat-developable photosensitive material of the present invention usually preferably has a
0°C to 200°C, more preferably 100°C to 170°C
Developing can be carried out simply by heating within a temperature range of, preferably 1 second to 180 seconds, more preferably 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.

Moreover, you may perform preheating in the temperature range of 70 degreeC - 180 degreeC before exposure. Also, JP-A-60-143338,
As described in Japanese Patent Application No. 60-3644, the photosensitive material and the image receiving member may be respectively preheated at a temperature of 80 DEG C. to 250 DEG C. immediately before thermal development transfer in order to improve their mutual adhesion.

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 professional ivy or plate, contacting with a heated roller or heated drum, or heating in a high-temperature atmosphere. The Joule heat generated by electricity can be absorbed by passing through the conductive material, or by using high-frequency heating, or by providing a conductive layer containing a conductive substance such as carbon black on the back surface of the photosensitive material of the present invention or the back surface of the image receiving member for thermal transfer. You can also use it. There are no particular restrictions on the heating pattern, including preheating (breheating) and then reheating; Repeated or even discontinuous heating is possible, but a simple pattern is preferred. Alternatively, a method in which exposure and heating proceed simultaneously may be used.

In the image-receiving member of the present invention, the image-receiving layer of the image-receiving member that is effectively used may be either hydrophobic or hydrophilic. Any material may be used as long as it has the function of receiving a dye. For example, any device having the function of 3 may be used. For example, polymers containing tertiary amines or quaternary ammonium salts as described in US Pat. No. 3,709,690 are preferably used. For example, a polymer containing a quaternary amminilam salt is polystyrene-N,N,N-tri-n-hexyl-N=vinyl-
The ratio of hensyl ammonium chloride is 1:4 to 4:
1, preferably in a 1:1 ratio. Examples of polymers containing tertiary amines include polyvinylpyridine. Also,
The image-receiving layer according to the present invention can be obtained by mixing a polymer containing amminirum salt, tertiary amine, etc. with gelatin, polyvinyl alcohol, etc., and coating the mixture on a support. Another useful dye-receiving material is preferably a heat-resistant organic polymer material having a glass transition temperature of 40 DEG C. or more and 250 DEG C. or less, which is described in JP-A-57-207250. These polymers may be supported on a support as an image-receiving layer, or they may themselves be used as a support.

Examples of the heat-resistant polymer substances include polystyrene, polystyrene derivatives having a substituent having 4 or less carbon atoms, polyvinylcyclohexane, polydivinylbenzene, polyvinylpyrrolidone, polyvinylcarbazole, polyallylbenzene, polyvinyl alcohol, polyvinyl formal, and polyvinyl. Polyacetals such as butyral, polyvinyl chloride, chlorinated polyethylene, polytrichloride fluorinated ethylene, polyacrylonitrile, poly-N.

N-dimethyl esterylamide, polyacrylate with p-cyanophenyl group, pentachlorophenyl group and 2,4-dichlorophenyl group, polyacrylchloroacrylate, polymethyl methacrylate, polyethyl methacrylate, polypropyl methacrylate, polyisopropyl methacrylate, poly Polyesters such as isobutyl methacrylate, poly tert-butyl methacrylate-1-, polycyclohexyl methacrylate, polyethylene glycol dinotafrylate, poly-2-cyano-ethyl methacrylate, polyethylene terephthalate,
Examples include polysulfone, polycarbonates such as bisphenol A polycarbonate, polyanhydrides, polyamides, and cellulose acetate-HJT. Also, "Polymer Handbook, Second Edition"
(edited by Joy Brandrup and E.H. Inmargat), published by John Willian and Sands (Poly
merHandbook2nd ed, (J, Br
andrup, edited by E. H. Immergut) John
Also useful are synthetic polymers with a glass transition temperature of 540°C or higher, as described in Wiley &5ons'j. - For boat fishing, the molecular weight of the polymer substance is 20
00-200000 is useful. These polymeric substances may be used alone or in a blend of two or more types, or may be used in combination of two or more types as a copolymer.

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

A particularly preferable image-receiving layer is JP-A-59-22342
Examples include a layer made of polyvinyl chloride described in Japanese Patent Application No. 5, and a layer made of 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.

As the support for the image-receiving member, any material such as a transparent support or an opaque support may be used, and examples thereof include films of polyethylene terephthalate, polycarbonate, polystyrene, polyvinyl chloride, polyethylene, polypropylene, and supports thereof. Supports containing pigments such as titanium oxide, barium sulfate, calcium carbonate, talc, etc., paper,
Baryta paper, RC paper laminated with thermoplastic resin containing pigment on paper, cloth, glass, metals such as aluminum, etc., and electron beam curable resin structures containing pigment on these supports. Examples include a support coated with a biological material and cured, and a support coated with a pigment-containing coating layer on these supports. Furthermore, the cast coat described in Japanese Patent Application No. 61-126972 is also useful as a support.

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 paper and an electron beam curable resin composition on the pigment coating layer. The resin layer of the support coated and cured can be used as an image-receiving layer, so it can be used as an image-receiving member as it is.

The heat-developable photosensitive material of the present invention was published in RD (Research Disclosure Magazine) Vol. 170. Late June 1978.
No. 7029 and Japanese Patent Application No. 60-276615.

The following is a margin. [Examples] Hereinafter, specific examples of the present invention will be described. However, as a matter of course, the present invention is not limited to the examples described below.

Example 1 In this example, a silver iodobromide emulsion, an organic silver salt dispersion, a dye-providing substance dispersion, and a reducing agent dispersion were prepared as follows, and these were used to prepare a photosensitive material sample Nα1- No, '2Q was created. An image receiving member was also created.

Note that the amounts added are for photosensitive materials and image receiving members 1n unless otherwise specified (the same amounts are shown in each table, as they are expressed as per amounts).

■Preparation of silver iodobromide emulsion At 50°C, JP-A No. 57-92523, No. 57
Using the mixing agitator shown in the specification of -92524,
Add 11.6 g of potassium iodide to solution (A) in which 20 g of ossein gelatin, 100 g of distilled water, and ammonia are dissolved.
It is an aqueous solution containing 131 g of potassium bromide (
500 m7 of solution B) and 500 m7 of solution (C), which is an aqueous solution containing 1 mol of silver nitrate and ammonia, were simultaneously pumped.
Ag was added while keeping it constant.

The shape and size of the emulsion grains to be prepared are determined by pH, pAg and B.
Adjustment was made by controlling the addition rates of liquid and liquid C. In this way, a core emulsion with a silver iodide content of 7 mol %, regular octahedral grains, and an average grain size of 0.25 μm was prepared.

Next, a core/shell type silver halide emulsion with 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 % in the same manner as above. (monodispersity was 9%). The emulsion thus prepared was washed with water and desalted.

■Preparation of photosensitive silver halide dispersion The following components were added to the silver iodobromide emulsion 70-- prepared as described above, and chemical sensitization and spectral sensitization were carried out to achieve red sensitivity.
Green-sensitive and blue-sensitive photosensitive silver halide emulsion dispersions were prepared.

(a) Preparation of red-sensitive silver iodobromide emulsion The above silver iodobromide emulsion 700rd 4-hydroxy-6-methyl-1°3.3a,7-tetrazaindene 0.4 g Gelatin 32 g Sodium thiosulfate 10 mg Mysterious pigment (a
) 1% methanol solution 8〇 - Ion-exchanged water 1200 m Aggravating dye (a) (b) Preparation of green-sensitive silver iodobromide emulsion Said silver iodobromide emulsion 70〇-4-hydroxy-6-methyl-■.

3.3a,7-tetrazaindene 0.4g Gelatin 32g Sodium thiosulfate 10 ■The following sensitizing dye (b)
1% methanol solution 80 rnl Ion exchange water 1200 +nl
Aggravating dye (b) (C) Preparation of blue-sensitive silver iodobromide emulsion Said silver iodobromide emulsion 700 m74-
Hydroxy-6-methyl-1゜3,'3a,7-3a,7-tetrazaindene 4g Gelatin 32g Sodium thiosulfate 10mg The following mulching dye (
C) 1% methanol solution 80 m ion-exchanged water 1200 m 7 Sensitizing dye (C) ■ Preparation of organic silver salt dispersion 5 obtained by reacting 5-methylbenzocitriazole and silver nitrate in a water-alcohol mixed solvent -Methylbenzotriazole 28.8 g of silver, 16.0 g of poly(N-vinylpyrrolidone), and 1.33 g of 5-methylbenzotriazole sodium salt were dispersed in an alumina ball mill, and the pH was adjusted to 5.5 and 200-.

■-(1) Preparation of dye-donating substance dispersion-1 35.5 g of the following polymeric dye-donating substance (1) and 5.0 g of the following hydroquinone compound were dissolved in 200 g of ethyl acetate, and Alkanol XC (manufactured by DuPont) 5 wt% aqueous solution 124mZ,
It was mixed with 720 mL of an aqueous gelatin solution containing 30.5 g of phenylcarbamoylated gelatin (Rouslow Company, Type 17819 P C), dispersed with an ultrasonic homogenizer, and after distilling off ethyl acetate, the pH was adjusted to 5.5 to 795-
This was completed to obtain a dye-providing substance dispersion-1.

Polymer dye-donor substance (1) Hydroquinone compound n+1 H ■-(2) Dye-donor dispersion liquid-2 Same as dye-donor substance-1 except that the dye-donor substance was changed to the polymer dye-donor substance (2) below. Dye-donor dispersion liquid.

Polymeric dye-providing substance (2) y = 40% by weight ■-(3) Dye-providing substance dispersion-3 This is a method in which the dye-providing substance is replaced with the following polymeric dye-providing substance (3) in the dye-providing substance dispersion-1. ) was obtained in the same manner as above, except that

Polymer dye-donor substance (3) ■ Preparation of reducing agent solution 20.0 g of reducing agent (A), 13.3 g of reducing agent (B), 14.6 g of poly(N-vinylpyrrolidone), the following fluorine-
0.50 g of a surfactant was dissolved in water, and the pH was adjusted to 5.5 to obtain a 250-reducing agent solution.

Surfactant ■ Preparation of photosensitive material (sample) Using the organic silver salt dispersion, silver halide emulsion, dye-providing substance dispersion and reducing agent solution prepared above, color photosensitive material with a multilayer structure as shown in Table 1 is prepared. Material Nα1 was created.

Further, the compounds of the present invention (or comparative compounds) shown in Table 2 were added to the layers shown in Table 2 in the amounts shown in Table 2 to prepare photosensitive materials Nα2-20. The compounds of the present invention are indicated by the numbers of the above-mentioned exemplary compounds (the same applies to Table 3).

*1 (F-1) "Q *2 (F-2) *3 (F-3) *4 (ST-1) II ■Preparation of image receiving member-1 Polymer was coated on 150 g/rrf photographic baryta paper. Image receiving member-1 was prepared by coating a tetrahydrofuran solution of vinyl chloride (n-1,100, manufactured by Wako Pure Chemical Industries, Ltd.) so that the amount of polyvinyl chloride was 12 g/rrf.

The heat-developable photosensitive samples 1 to 20 were exposed to 1600 CMS through a step wedge, and together with the image receiving member-1, they were heated at 140°C for 70 seconds and 90°C, respectively.
After thermal development was performed for a second, the photosensitive material and image receiving member were quickly peeled off, and a step wedge negative image was obtained on the polyvinyl chloride surface of the image receiving member.

The reflection density of the obtained transferred negative image was measured using a densitometer (PDA-65
(manufactured by Konica ■), blue light, green light, and red light were measured. Table 2 shows the obtained sensitivity (reciprocal of the exposure amount giving De=+++0.3), maximum density (D,...), and minimum density (D, in).

In Table 2, the sensitivity is expressed as a relative sensitivity when the sensitivity of Comparative Sample 1 at a development time of 90 seconds is set as 100. Also, B, G, and R represent reflection density measurements performed using monochromatic light of blue, green, and red, respectively, and 70. and 90 are
This indicates that heat development was performed for 70 seconds and 90 seconds, respectively.

Table 2 shows that when the compound of the present invention is used, the sensitivity and maximum density (D,...) increase due to its development accelerating effect, while the sample of the present invention increases the minimum density by 1.7. It can be seen that there are almost no

Example-2 In the image-receiving member-1 used in Example-1, the development accelerator, image stabilizer, and compound of the present invention shown in Table 3 were added to the image-receiving layer. As a result, the image receiving member N1 shown in Table 3
12A-2N were obtained. Using these image receiving members, - Using sample Nα1 used in Example-1 as a force-sensitive material,
Thermal developability was examined in the same manner as in Example-1. The results are shown in Table 3.

From the results shown in Table 3, it can be seen that the image receiving member to which the compound according to the present invention has been added has high sensitivity and high maximum density without almost increasing the minimum density and 17 even when added to the image receiving layer. It can be seen that this can be obtained by short-time heat development.

Example 3 In this example, a dye-providing substance dispersion 4, a photothermographic material 2, and an image receiving member 3 shown below were used.

Preparation of dye-donating substance dispersion-4> 30.3 g of the following dye-donating substance (4) was dissolved in 30.3 g of tricresyl phosphate and 90.9 af of ethyl acetate, and a surfactant was added in the same manner as in Example-1. After mixing with an aqueous gelatin solution containing 460 mZ and dispersing with an ultrasonic homogenizer, ethyl acetate was distilled off, and water was added to make a total volume of 500 m7.

Dye-providing substance (4) Preparation of heat-developable photosensitive material sample> Here, a sample of the heat-developable photosensitive material was prepared as follows. That is, the blue-sensitive silver halide emulsion was 40.4af
, 25.0 m7 of organic silver salt dispersion, 50.0 m7 of dye-providing substance dispersion-4, and further 4.20 g of polyethylene glycol 300 (Kanto Kagaku) as a heat solvent, t-
10 of phenyl-4,4-dimethyl-3-pyrazolidone
By adding 1.5af of the wt% methanol solution, 3.0Oaf of the same hardening agent as in Example-1, and 20.0af of the 10wt% water-alcohol solution of guazine trichloroacetic acid, a 180 μm thick undercoat layer was prepared. A photographic polyethylene terephthalate film was coated with a silver content of 2.50 g/rtr to prepare a photosensitive material of sample Nα101.

Separately, 0.1 g of the above-mentioned compound (1) of the present invention was added to the coating solution of the photosensitive material of the sample Nα101, and a sample Nα102 was prepared which was the same as the sample Nα101 except for the above. In addition, the comparative compound RE was added to the coating solution of the photosensitive material of sample Nα101.
Sample No. 103, which was the same as Sample K No. 101 except for the addition of 0.1 g of -2, was prepared.

Preparation of Image Receiving Member-3> The following layers were sequentially coated on a 100 μm thick transparent polyethylene terephthalate film.

(1) Layer made of polyacrylic acid. (7,OOg/rf
f) (2) A layer consisting of cellulose acetate. (4,00g
/rd) (3) Styrene and N-benzyl-N,N-
A layer consisting of a l:l copolymer of dimethyl-N-(3-maleimidopropyl)ammonium chloride and gelatin.

Copolymer 3.00g/nf Gelatin 3.00g/bo(4) urea and polyvinyl alcohol (Saponification degree 98%
).

4.0 g of urea/3.0 g of polyvinyl alcohol/3.0 g of photothermographic material sample Nα101.102 was exposed to 1,600 CMS through a step wedge, and together with image receiving member-3 was exposed to 150 CMS of light in a heat developing machine. ``1 in C
After thermal development for a minute, the image receiving member was immediately peeled off. The transmission density of the yellow transparent image obtained on the surface of the image receiving member was measured using a densitometer (PAD-65, manufactured by Konica ■), and the maximum density, minimum density (fog), and sensitivity were measured. The results are shown in Table 4 below.

Table 4 From Table 4, it can be seen that when the compound of the present invention is used, sensitivity and maximum concentration can be increased with almost no increase in minimum concentration compared to samples Nα101 and 102, which are comparative samples, and good rapid processability can be achieved. It can be seen that it has

Example-4 Each of the heat-developable photosensitive materials 1 to 20 used in Example-1 was
Wedge exposure with monochromatic blue, green, and red light was performed. Further, as an image receiving member, the image receiving member 2 described in Example-2
Same structure as H, except that the following image stabilizers 5A-1 (0.4 g), 5A-2 (0.3 g), 5A-
3 (0.2 g), and otherwise formed the same image receiving member as image receiving member 2H.

The exposed photosensitive materials 1 to 20 were superimposed on this image receiving member and thermally developed at 140° C. for 70 seconds in the same manner as in Example 1 to obtain cyan, magenta, and yellow dye images on the image receiving member.

A-2 The fastness of the dye image of each of the obtained image receiving members was examined according to the following method.

(Storability in light) Using a xenon fade meter (manufactured by Suga Test Instruments),
Light irradiation was performed for 120 hours, and the fading rate (Δ
D′・0) and the increase in stain in the Dmin portion (ΔDm
in) was calculated.

(Dark Storage) The sample was stored in the dark for 3 days at a temperature of 60° C. and a relative humidity of 60%, and the fading rate (ΔD1·0) and stain increase (ΔDmin) were determined in the same manner as in the case of storage in the light.

The fading rate ΔD1·0 is based on the following formula.

ΔD1°'=(1,0−reflection density after storage at a location with initial density 1.0)xlOO The results obtained are shown in Table 5.

From the results shown in Table 5, it is possible to improve the performance by adding the compound of the present invention.

(Effects of the Invention) As described above, according to the present invention, it is possible to provide a heat-developable photosensitive material and an image-receiving member that can be developed quickly and provide images with good storage stability.

Claims (1)

[Scope of Claims] 1. In a heat-developable photosensitive material having a photographic constituent layer containing at least a photosensitive silver halide, a reducing agent, and a binder on a support, at least one of the photographic constituent layers
A photothermographic material characterized in that a layer thereof contains a compound represented by the following general formula [I]. General formula [I] ▲There are mathematical formulas, chemical formulas, tables, etc.▼ Z represents a group of nonmetallic atoms necessary to form a 5- or 6-membered heterocycle, and when Z forms a 5-membered ring, n is 1-4
and when Z forms a 6-membered ring, n is an integer of 1 to 5. R_1 represents a hydrogen atom or a substituent, and when n is 2 or more, R_1 may be the same or different. However, at least one of R_1 is represented by the following general formula [II]. General formula [II] -X-R_2 X is -COO-, -NHCONH-, -CONH-, -
NHCO-, -CO-, -O-CO-, -SO_3, -
It represents any one of SO_2-, -O-, -NH-, and -SO_2NH-, and R_2 represents any one of a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, and a heterocycle. When R_2 is a hydrogen atom, it also includes a salt form. 2. An image-receiving member having an image-receiving layer that receives an image by transferring a dye from a photosensitive material, characterized in that the image-receiving layer contains a compound represented by the following general formula [I]. General formula [I] ▲There are mathematical formulas, chemical formulas, tables, etc.▼ Z represents a group of nonmetallic atoms necessary to form a 5- or 6-membered heterocycle, and when Z forms a 5-membered ring, n is 1-4
and when Z forms a 6-membered ring, n is an integer of 1 to 5. R_1 represents a hydrogen atom or a substituent, and when n is 2 or more, R_1 may be the same or different. However, at least one of R_1 is represented by the following general formula [II]. General formula [II] -X-R_2 X is -COO-, -NHCONH-, -CONH-, -
NHCO-, -CO-, -O-CO-, -SO_3-,
-SO_2-, -O-, -NH-, -SO_2NH-, and R_2 represents any one of a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, and a heterocycle. When R_2 is a hydrogen atom, it also includes a salt form.