JPH0248659A - Thermally developable color photosensitive material - Google Patents

Abstract

PURPOSE:To enhance the S/N, sharpness and tone reproducibility of a thermally developable color photosensitive material by incorporating a specified compd. CONSTITUTION:A compd. represented by formula I is incorporated into a photosensitive material contg. photosensitive silver halide, a binder, a nondiffusible dye providing compd. (A) which releases a diffusibile dye when reduced, and electron donor and an electron transferring agent. In the formula I, each of R1 and R2 is H, (substd.) alkyl, etc., and each of R3-R5 is, hydroxyl, etc. A compd. represented by formula II may be used as the compd. represented by formula I. A compd. represented by formula III may be used as the compd. A. In the formula III, X is O, S, etc., R<104> is a group of atoms forming a desired hetero ring, EAG is a group accepting an atom from a reducing substance, Time is a group releasing Dye (dye) through a subsequent reaction and t is 0 or 1.

Description

[Detailed Description of the Invention] <Industrial Use Minute Hand> The present invention relates to a heat-developable color photosensitive material.
In particular, the present invention relates to a heat-developable color photosensitive material capable of obtaining positive color images with high image density and low staining.

Background technology> Heat-developable photosensitive materials are well-known, and for information about heat-developable photosensitive materials and their processes, for example, see pages 1--2 of "Fundamentals of Photographic Engineering" Non-Silver Salt Photography H (IYT-published by Corona Publishing). ! ! Page, U.S. Patent No. 10062, etc.

Many methods have also been proposed for obtaining positive color images by heat development.

For example, U.S. Pat. No. 4tJ-12120 discloses that a so-called oxidized DRR compound with no dye-releasing ability is made to coexist with a reducing agent, and the reducing agent is oxidized according to the exposure amount of silver halide by heat development. A method has been proposed in which the dye is reduced using a reducing agent that remains unoxidized to release a diffusible dye. Also, in European Patent Publication No. 2207116, Published Branch Root t7-4/Tata (Published Branch Root Volume 1 λλ No.),
A process for thermally developable positive imaging using novel compounds that release diffusible dyes by a similar mechanism is described.

However, the heat-developable color photosensitive materials that produce positive color images do not reach the level of commercially available coupler print materials in terms of image stain, sharpness, and tone reproducibility.

<Problems to be Solved by the Invention> An object of the present invention is to improve the 8/N, sharpness, and tone reproducibility of a heat-developable color photosensitive material using a reducible dye-providing compound.

<Friendly Means for Solving the Problems> An object of the present invention is to provide a support with at least a photosensitive silver halide, a binder, and a non-diffusible dye-providing compound (hereinafter referred to as a covered material) that releases a diffusible dye when reduced. A heat-developable color photosensitive material comprising a reducing dye-donating compound (referred to as a reducing dye-donating compound), an electron donor, and an electron transfer agent, further comprising a compound represented by the following general formula (1). achieved by.

General formula [I] In the formula, R1 and R2 are hydrogen atoms, substituted or unsubstituted alkyl groups, aryl groups, acyl groups, alkoxycarbonyl groups, and R3-R5 are hydrogen atoms, hydroxyl groups,
Includes a halogen atom, a nitro group, a sulfo group, a cyano group, a substituted or unsubstituted alkyl group, an aryl group, an alkoxy group, an aryloxy group, an acyl group, an acyloxy group, a carbonate group, and an amino group.

Further, when R□ or R2 is a hydrogen atom, one or both of the hydroxyl groups may be dissociated to form a salt with a /-j valent metal ion.

Examples of compounds represented by the above general formula (1) include L-ascorbic acid derivatives known as vitamin C;
Examples include D-ine ascorbic acid derivatives.

In the field of photosensitive materials, ascorbic acid derivatives are known as K
It is a substance known as a developing agent that has a structure that satisfies the endall-Peltz rule. The compound of general formula (I) used in the present invention will be described in more detail.

In the general formula (I), R1 and 'RI2 are each a hydrogen atom, a substituted or unsubstituted alkyl group (having a carbon number of -θ or less, such as methyl, ethyl, droxyethyl, methyl,
cyclohexyl), IJ-A groups (with carbon numbers of -θ or less, e.g., phenyl, sulfophenyl), acyl groups (with carbon numbers of -θ or less, e.g., acetyl, benzoyl), alkoxycarbonyl groups (with carbon numbers of -θ or less, e.g., methoxycarbonyl), Nyl, phenoxycarbonyl) are different.

The compound represented by general formula (1) is preferably water-soluble during development processing. For this reason, R1 and R2 are preferably hydrogen atoms, metal salts that can be dissociated during treatment, or groups that can be easily hydrolyzed during treatment.

R3-R5 are a hydrogen atom, a hydroxyl group, a halogen atom (e.g. fluorine, chlorine, bromine), a nitro group, a sulfo group, a cyano group, each substituted or unsubstituted alkyl group (preferably carbon number -0 or less. For example, Methyl, ethyl, propyl, pentadecyl, cyclohexyl, and droxyethyl), oryl group (preferably carbon number -〇 or less. For example,
phenyl, tolyl), alkoxy group (preferably carbon number - 0 or less. For example, methoxy, ethoxy, methoxyethoxy), aryloxy group (carbon number - 0 or less is preferable. For example, phenoxy), acyl group (carbon number - 〇 or less is preferable. For example, acetyl, benzoyl), acyloxy group (carbon number - 〇 or less is preferable. For example, acetyloxy, propionyloxy, heptanoyloxy, palmitoyloxy, benzoyloxy), carbonate group (carbon number - θ or less) are preferred. For example, methoxycarbonyl, ethoxycarbonyl, phenoxycarminyl)
, amine group (preferably carbon number -〇 or less.

For example, -NH2, dimethylamino, N,N-di-hydroxyethylamino). Among these, from the point of view of water solubility, the number of carbon atoms is particularly preferably less than or equal to 1.

R-R, two or more may be bonded to each other to form a ring.

The amount of the compound of general formula (1) to be added is the electron transfer agent (
ETA) is preferably 7,720 to 1 times (mol), more preferably 7,770 to 2 times (mol) of ETA'.

The layer to which the compound of general formula [I] is added is not particularly limited, and may be any of the photosensitive layer, intermediate layer, protective layer, and undercoat layer, but it is particularly effective when added to the intermediate layer.

Specific examples of the compound represented by general formula (1) are listed below.

As-/ 5-j (Jll As-3 S-1 Suh As-7 As-r As-bu As-/.

As-/ As-/j As-/ ≠ As-/! As-/ 5-Jl H As-/ As-/7 As-/r S-2 As-, 24L As-Jj As- As-, 2j α As-j/ As-, 27 As-Jj As -uJ' Although it can be added to either the silver emulsion layer or the reducible dye-donating compound layer, at least the electron transfer As-J' An electron donor is combined with a binder and a silver halide emulsion to form a photosensitive layer/unit. The reducible dye-providing compound may be added to the same layer as the silver rognide emulsion, or may be added separately to adjacent layers. In the latter case, it is preferable from the viewpoint of sensitivity that the layer containing the reducible dye-providing compound is located below the silver halide emulsion layer.

In this case, the electron transfer agent and electron donor are preferably present in the silver halide emulsion layer.

In the present invention, at least 2 & 11 such photosensitive layers are used. Usually, in order to reproduce full color, three sets of photosensitive layers having mutually different color sensitivities are provided. For example, a blue sensitive layer, a green sensitive layer,
Examples include a combination of three sets of red-sensitive layers, a combination of three sets of green-sensitive layers, red-sensitive layers, and infrared-sensitive layers. Each color-sensitive layer can be arranged in any order known in conventional color photosensitive materials.

Moreover, each of these color-sensitive layers may be divided into two or more layers as necessary.

Next, the reducible dye-providing compound used in the present invention will be explained.

The reducible dye-providing compound used in the present invention is preferably a compound represented by the following general formula (C-1).

PWR-(Time)L-Dye General formula (C-1) In the formula, PWR is reduced to -(Time)
Represents a group that releases t-Dye.

Time is from PWR -(Time)L -Dy
represents a group that releases Dye through a subsequent reaction after being released as e.

t represents an integer of 0 or 1.

Dye represents a dye or its precursor.

First, PWH will be explained in detail.

PWR is US Pat. No. 4,139,389, or US Pat. No. 4,139,379, US Pat. No. 4,564.577,
Electron-accepting center and intramolecular nucleophilic substitution reaction in a compound that releases a photographic reagent by an intramolecular nucleophilic substitution reaction after being reduced as disclosed in JP-A-59-185333 and JP-A-57-84453 It may correspond to a portion including the center, or may correspond to a portion including the center, or may be similar to US Pat. As disclosed in 2006, the compound corresponds to an electron-accepting quinonoid center in a compound that eliminates a photographic reagent through an electron transfer reaction in the molecule after being reduced, and a portion containing a carbon atom that connects it to the photographic reagent. It may also be JP-A-56-1425.
No. 30, U.S. Pat. No. 4,343,893, 4. 61
9. No. 884, the single bond is cleaved to release the photographic reagent after reduction, and the atom (sulfur atom or It may also correspond to a moiety containing a carbon atom or a nitrogen atom).
It may correspond to a moiety containing a nitro group in a nitro compound that releases a photographic reagent after electron acceptance and a carbon atom that connects the photographic reagent with the nitro group, as disclosed in No. 450,223. , U.S. Patent 4,609.61
It may correspond to the geminal dinitro moiety in the dinitro compound that beta-eliminates the photographic reagent after electron acceptance and the carbon atom-containing moiety that connects it to the photographic reagent described in No. 0.

In addition, compounds having so, -x (X represents oxygen, sulfur, or nitrogen) and an electron-withdrawing group in one molecule as described in Japanese Patent Application No. 106885/1982,
106895, a po-x bond (X
is the same meaning as above) and an electron-withdrawing group, a compound having a c-x' bond (X' is the same as X or represents 13ow-) in one molecule as described in Japanese Patent Application No. 106887/1987. Examples include compounds having an electron-withdrawing group.

In order to more fully achieve the object of the present invention, the general formula (C
Among the compounds of -1), those represented by general formula (CII) are preferred.

The general formula [CH3 ('rime to zDFe is l'; j161, R16 or EAG) is bonded to at least one of the following.

-1 formula [°ζ will be explained about the part corresponding to PWH of CH3.

X represents a group containing an oxygen atom (-0-), a sulfur atom (-3-), or an i-atom (-NCR"go)-).

R+e+, R16! and R1@3 represents a group other than a hydrogen atom or a simple bond.

Groups other than hydrogen atoms represented by H16I, R+@*, and R111 include alkyl groups, aralkyl groups,
alkenyl group, alkynyl group, aryl group, heterocyclic group,
Examples include sulfonyl group, carbamoyl group, and sulfamoyl group, which may have a substituent.

R11 and 818m are preferably substituted or unsubstituted alkyl groups, alkenyl groups, alkynyl groups, aryl groups, heterocyclic groups, acyl groups, sulfonyl groups, etc. R111
+ and R″3 preferably have 1 to 40 carbon atoms.

Preferred examples of R10 include substituted or unsubstituted acyl groups and sulfonyl groups, which are the same as the acyl groups and sulfonyl groups described for R1.l and R1163. The number of carbon atoms is preferably 1 to 40.

RltI, Rlt and RII3 may be bonded to each other to form a five- to eight-membered ring.

As X, enzymes are particularly preferred.

EAG will be described later.

Furthermore, in order to achieve the object of the present invention, general formula (Cl)
Among the compounds represented by the formula (I), those represented by the general formula ([I]) are preferred.

General formula (CI[l) EAG (Timr?rDye binds to at least one of RIoa and EAG.

X has the same meaning as above.

R11 represents an atomic group that is bonded to the X1 nitrogen atom to form a five- or six-membered monocyclic or condensed heterocycle including the nitrogen atom.

EAG represents a group that accepts or takes electrons from a reducing substance, and is bonded to a nitrogen atom. EAG is preferably a group represented by the following general formula (A).

General formula (A) In the general formula (A), (1) or ZISZ represents an atomic group forming a king or six-membered aromatic group, and n represents an integer from 3 to 3.

V3: -Zi--1V4; -Zi -Za
−1vS; −2, −2, −2, −1Vi; −Zx
-Zs -Zs Zi-1Vt; Zs
Za −Zs −Zi−Z, −1V*; −Zs
Za-Zs-Zh-21-2,-.

Each of Zx-Zs represents 10--N--0Sub-S-1 or 15Ot-, and each Sub represents a simple bond (pi bond), a hydrogen atom, or W tA & described below. Sub may be the same or different, or may be bonded to each other to form a king to six-membered saturated or unsaturated carbocycle or heterocycle.

In general formula (A), the sum of the substituent constants sigma para of substituents is +0.50 or more, more preferably +0.
Select Sub so that it is 70 or more, most preferably +0°85 or more.

EAG is preferably a ring group or a heterocyclic group bound by at least one electron-withdrawing group. Substituents bonded to the rear group or the complex r:1 group of EAG can be used to adjust the physical properties of the entire chemical compound. Examples of physical properties of the entire compound include ease of accepting electrons, water solubility, oil solubility, diffusibility, sublimation, melting point, dispersibility with binders such as gelatin, and reaction with nucleophilic groups. It can be used to adjust the properties, reactivity toward electrophilic groups, etc.

A specific example of an EAG is described in European Patent Publication No. 220746A2, pages 6-7.

Time may lead to the cleavage of nitrogen-oxygen, nitrogen-nitrogen or nitrogen-sulfur bonds, resulting in D
Represents a group that releases ye.

Various groups represented by Time are known, for example, JP-A-61-147244, pages (5)-(6), JP-A-61-147244.
No. 36549, pages (8) to (14), patent application 1986-88
625, pages (36) to (44).

1) The dyes represented by ye include azo dyes, azomethine dyes,
anthraquinone dye, naphthoquinone dye, styryl group,
These include nitro dyes, quinoline dyes, carbonyl dyes, and phthalocyanine dyes. Note that these dyes can also be used in the form of a temporarily shortened wavelength that can be multicolored during development.

Specifically, IEP No. 76.492A, JP-A-59-16
1)ye disclosed in No. 5054 can be used.

It is necessary that the compound itself is immobile in the photographic layer, so that B, a, G, R101, R11
It is desirable to have a ballast group having 8 or more carbon atoms at the +4R10'' or X position (particularly at the EAG position).

Typical specific examples of the reducible dye-providing compound used in the present invention are listed below, but the present invention is not limited to these (see, European Patent Publication No. 220746A2, Publication No. 87-6199, etc.). The dye-donating compounds described can also be used.

Represented by the above general formula (CIO) or (CI[l) (
lO) C+th]s3 CH3

The amount of the dye-donating compound used depends on the extinction coefficient of the dye, but is Oo 05-5 mmol/I, preferably 0.1-5 mmol/I.
1 Dye-donating substances with a range of 3 mmol/n (1) can be used alone or in combination of two or more. In addition, in order to obtain images of black or different hues, JP-A-60-16
As described in No. 2251, mobile dyes having different hues, for example, at least one of cyan, magenta, and yellow dye-providing substances are mixed and contained in a layer containing silver halide or in an adjacent layer. It is also possible to use a mixture of two or more types of dye-providing substances that emit .

In the present invention, an electron donor and an electron transfer agent (ETA) are used, and details of these compounds are described in European Patent Publication No. 22074682, Kokai Gibu No. 87-6199, and the like. Particularly preferred electron donors (or precursors thereof) are compounds represented by the following general formula [C] or (D).

General formula (C) General formula (D) In the formula, A, □ and A1°8 each represent a hydrogen atom or a protecting group for a phenolic hydroxyl group that can be deprotected with a nucleophilic reagent.

Here, as the nucleophile, 0HeSRoe (R; alkyl group, aryl convex, etc.), hydroxamic acid anion 1
Anionic reagents such as 13 o and te, primary or secondary amines, hydrazine, hydroxylamines,
Compounds having non-covalent f electron pairs such as alcohols and thiols can be mentioned.

Preferred examples of AH+ and A1** include a hydrogen atom, an acyl group, an alkylsulfonyl group, an arylsulfonyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, a dialkylphosphoryl group, a dialkylphosphoryl group, or JP-A-59-197037; 59-20
The iI group disclosed in No. 105 may be used, and A
lol, A+os is R101, Rg・if possible
Z, RZ*2 may be combined with R2O3 to form a ring, and A. 1.A. , may both be the same or different.

R"', R""% R""# and R"@' t:
1. tL each hydrogen atom, alkyl group, aryl group, alkylthio group, arylthio group, sulfonyl group, sulfo group, halogen atom, cyano group, carbamoyl group, sulfamoyl group, amide group, imide group, carboxyl group, sulfonamide These groups may have a substituent if possible.

However, the total carbon number of R101 to R1@4 is 8 or more. Also, at -maximum (C), R15I and Rxoz
R"3 and) J"' may be represented by the general formula % and/or R2O3 and Rn4 may combine with each other to form a saturated or unsaturated ring.

Among the electron donors represented by -maximum (C) or (D), those in which at least two of Rx@+ and Rzoa are substituents other than hydrogen atoms are preferred. Particularly preferred compounds are those in which at least two of R161 and R202 are substituents other than hydrogen atoms. on the other hand,
and at least one of R16M and Rn4 is a substituent other than a hydrogen atom.

A plurality of electron donors may be used in combination, or an electron donor and its precursor may be used in combination, and the electron donor may be the same compound as the reducing substance of the present invention. Although only examples are listed below, the invention is not limited to these compounds.

(fED-1) (ED-2) )■ (ED-3) (ED-7) (ED-4) (ED-r) (ED-5) (ED-1) CI+3 (BD-10) CI(.

H (ED-/ (ED-/μ) (ED-/J (ED-/J (Jl-1) The amount of the electron donor (or its precursor) to be used has a wide range, but preferably it o per mole of substance, o
A preferred range is from i mol to j0 mol, particularly from 0.1 mol to I mol. For 1 mole of silver halide o,
Ooi mole~! moles, preferably 0.01 moles to /, j
It is a mole.

As the ETA used in combination with these electron donors, any compound can be used as long as it is oxidized by silver halide and the oxidized form thereof has the ability to cross-oxidize the above electron donor. Preferably a sexual one.

A particularly preferable ETA is the following general formula (X-I) or (
This is a compound represented by X-1f).

(X-1) In the formula (X-1), 几 stands for an aryl group. Rin, RB303 B504 B
505 and B 306 are a hydrogen atom, a halogen atom, an acryl amino group, an alkoxy group, an alkylthio group, an alkyl group, or an aryl group, and may be substituted if possible. Further, these may be the same or different.

In the present invention, compounds represented by general formula (X-1t) are particularly preferred. In general formula (X-1f), 3
301 B 302 B 303 and 几 are a hydrogen atom, an alkyl group having 7 to io carbon atoms, and a carbon number/-10
Substituted alkyl groups and substituted or unsubstituted aryl groups are preferred, and more preferably substituted with hydrogen atoms, methyl groups, hydroxymethyl groups, phenyl groups, or hydrophilic groups such as hydroxyl groups, alkoxy groups, sulfo groups, and carboxyl groups. It is a phenyl group.

Specific examples of ETA are shown below.

(X-/>(X-co) (X-J) (X-4A) i-i3t, :u (X-, t) (X-4 (X-//) (X-/J) (X -/J) (X-/da) (X-7) (X-t) (X-2) (X-10) 3C E "r A used in the present invention Although it does not have a developing effect during storage, it is a compound that can release ETA only by the action of an appropriate activator (eg, base, nucleophile, etc.) or heating.

In particular, the ETA precursor used in the present invention has a reactive functional group blocked with a blocking group.
Although it does not function as an ETA before development, it can function as an ETA because the blocking group is cleaved under alkaline conditions or when heated.

Examples of the ETAff) precursor used in the present invention include 2- and 3-acyl derivatives of 1-phenyl-3-pyrazolidinone, 2-aminoalkyl or hydroxylalkyl derivatives, hydroquinone, metal salts such as catechol (lead,
cadmium, calcium, barium, etc.), acyl halide derivatives of hydroquinone, oxazine and bisoxazine m11 forms of hydroquinone, lactone type ETA precursor, hydroquinone precursor with quaternary ammonium group/cyclohex-2-ene-1,4- In addition to dione-type compounds, compounds that release ETA through electron transfer reactions,
Examples include compounds that release ETA by intramolecular nucleophilic ff1tA reaction, ETA precursors blocked with phthalide groups, PTA precursors blocked with indomethyl groups, and the like.

The ETA precursor used in the present invention is a known compound, for example, US Pat. No. 767.704, US Pat.
．． No. 967, same No. 3. 246. No. 988, same No. 3.
No. 295.978, No. 3.462.266, No. 3
, No. 586.506, No. 3.615,439, No. 3. 650. No. 749, No. 4,209.580, No. 4,330.617, No. 4,310.612
British Patent No. 1.023,701, British Patent No. 1.231
゜830, same No. 1,258.924, same No. 1゜34
6.920, JP-A-57-40245, JP-A-57-40245, JP-A No. 5B-1
No. 139, No. 58-1140, No. 59-178458
It is possible to use developer precursors described in Japanese Patent No. 59-182449, Japanese Patent No. 59-182450, and the like.

In particular, JP-A-59-178458, JP-A No. 59-18244
The precursors of 1-phenyl-3-pyrazolidinones described in No. 9 and No. 59-182450 are preferred.

ETA and an ET8 precursor can also be used together.

In the present invention, the combination of electron donor and ETA is preferably incorporated into the heat-developable color photosensitive material. Electron donors, ETA, or their precursors can be used in combination of two or more, and emulsion J!
! (Blue sensitive layer, green sensitive layer, red sensitive layer, infrared sensitive layer, ultraviolet sensitive layer, etc.)
It can be added to each emulsion layer, only to some emulsion layers, to adjacent emulsion layers (antihalation layer, undercoat layer, intermediate layer, protective layer, etc.), or even to all emulsion layers. It can also be added to the layer. The electron donor and ETA can be added to the same layer or to separate layers.

Additionally, these reducing agents can be added in the same layer as the dye-donating substance or in a separate layer; however, it is preferable that the diffusion-resistant electron donor be present in the same layer as the dye-donating substance. Preferably, ETA can be incorporated into the image receiving material (dye fixing layer), or if a small amount of water is present during thermal development, it can be dissolved in this water.
or the preferable usage amount of those precursors is 'dye donating'.
The total amount is 0.01 to 50 mol per lk'JH mol.
Preferably 0.1 to 5 mol, total amount of 0.001 to 5 mol, preferably 0.01 to 1 mol per mol of silver halide.
．． It is 5 moles.

Moreover, ETA is 60 mol% or less, preferably 40 mol% or less of the total reducing agent. When ETA is dissolved in water and supplied, the concentration of ETA is 10-4 mol/l-1 mol/
1 is preferred.

In order to introduce the reducing substances, dye-donating substances, electron donors, electron transfer agents or their precursors and other hydrophobic additives of the present invention into the hydrophilic colloid layer, high-boiling organic solvents such as alkyl phthalates can be used. Esters (dibutyl phthalate, dioctyl phthalate, etc.), phosphoric acid esters (diphenyl phosphate, triphenyl phosphate, tricyclohexyl phosphate, tricresyl phosphate, dioctyl butyl phosphate), citric acid esters (e.g. acetyl tributyl citrate) )
, benzoic acid esters (e.g. octyl benzoate), alkyl 7mides (e.g. diethyl laurylamide), fatty acid esters (e.g. dibutoxyethyl succinate, dioctyl azelate), trimesic acid esters (e.g. tributyl trimesate) 61-231500
Carboxylic acids described in JP-A-59-83154, JP-A-59-178451, JP-A-59-178452, JP-A-5
No. 9-178453, No. 59-178454, No. 59
-178455, US Pat. No. 59-178457 using the method described in U.S. Pat.
If! a) Dissolved in a solvent such as lower alkyl acetate such as ethyl acetate or butyl acetate, ethyl propionate, secondary butyl alcohol, methyl isobutyl ketone, β-ethoxyethyl acetate, methyl cellosolve acetate, cyclohexanone, etc., and then dispersed in a hydrophilic colloid. be done.

The above-mentioned high boiling point a solvent and low boiling point organic solvent may be mixed and used, and after dispersion, the low boiling point organic solvent may be removed by ultrafiltration or the like as necessary. The amount of the high-boiling organic solvent is 10 g or less, preferably 5 g or less, per 1 g of the dye-providing substance used. Further, the amount is 5 g or less, preferably 2 g or less per 1 g of the diffusion-resistant reducing agent.

Furthermore, 1 g or less of high boiling point organic solvent per 1 g of binder,
The amount is preferably 0.5 g or less, more preferably 0.3 g or less. Further, the dispersion method using a polymer described in Japanese Patent Publication No. 51-39853 and Japanese Patent Application Laid-Open No. 51-59943 can also be used. In addition, it can be directly dispersed in an emulsion, or it can be dissolved in water or alcohol and then dispersed in gelatin or an emulsion.

In the case of a compound that is substantially insoluble in water, it can be dispersed and contained in the form of fine particles in the bangu, in addition to the above-mentioned method. (For example, JP-A-59-174830, JP-A No. 53-1
When dispersing a hydrophobic substance in a hydrophilic colloid, various surfactants can be used.
The surfactants listed on pages (37) to (38) of No. 157636 can be used.

The heat-developable photosensitive material of the present invention basically has a photosensitive silver halide, a binder, an electron donor, an electron transfer agent, and a reducible dye-donating compound on a support, and if necessary, It can contain organic metal salt oxidizing agents and the like. These components are often added to the same layer, but if they are in a reactable state, they can be added separately to separate layers.For example, a colored dye-providing compound may be added to the lower layer of the silver halide emulsion. If present in , a decrease in sensitivity can be prevented. It is preferable that the reducing agent be incorporated into the photothermographic material, but it may also be supplied from the outside, for example by diffusing it from a dye fixing material, which will be described later.

In order to obtain a wide range of colors in the chromaticity diagram using the three primary colors yellow, magenta, and cyan, at least three silver halide emulsion layers each sensitive to a different spectral region are used in combination.

For example, a 37W combination of a blue-sensitive layer, a green-sensitive layer, and a red-sensitive layer,
There are combinations of green-sensitive layers, red-sensitive layers, and infrared-sensitive layers.

Each photosensitive layer can be arranged in various arrangements known for conventional color photosensitive materials.

Further, each of these photosensitive layers may be divided into 2FJ or more, if necessary.

The heat-developable photosensitive material can be provided with various auxiliary layers such as a protective layer, an undercoat layer, an intermediate layer, a yellow filter layer, an antihalation layer, and a back layer.

Silver halides that can be used in the present invention include silver chloride, silver bromide,
Any of silver iodobromide, silver chlorobromide, silver chloroiodide, and silver chloroiodobromide may be used.

The silver halide emulsion used in the present invention is a surface latent image type emulsion.A zero surface latent image type emulsion is an emulsion in which a latent image is mainly formed on the grain surface, and is also called a negative type emulsion. The definition of emulsion is described in Japanese Patent Publication No. 5 B-9410.

The silver halide emulsion of the present invention may be a so-called core-shell emulsion in which the grain interior and the grain surface have different phases.The silver halide emulsion may be monodisperse or polydisperse, and may be a mixture of grass + lk emulsion. The zero particle size that may be used is 0.
The crystal habit of the silver halide grains, which is preferably 1 to 2 .mu.m, particularly preferably 0.2 to 1.5 .mu.m, may be cubic, octahedral, tetradecahedral, tabular with a high aspect ratio, or other.

Specifically, U.S. Patent No. 4,500.626, column 50, U.S. Pat.
Any of the silver halide emulsions described in JP-A-62-253159 and the like can be used.

Is it okay to use silver halide emulsions as they are unripe? They are usually chemically sensitized before use. 0 Conventional emulsions for light-sensitive materials include the well-known sulfur sensitization method, reduction sensitization method, and noble metal sensitization method. These can be used alone or in combination. These chemical sensitizations can also be carried out in the presence of a nitrogen-containing heterocyclic compound (JP-A-62-253159).

The coating amount of the photosensitive silver halide used in the present invention is in the range of 1 to 10 g/m in terms of silver.

In the present invention, an organic metal salt can also be used as an oxidizing agent together with photosensitive silver halide.

Among such organic metal salts, ia silver salts are particularly preferably used.

Organic compounds that can be used to form silver salt oxidizing agents include U.S. Pat.
There are benzotriazoles, fatty acids and other compounds described in columns 53 and the like. Also useful are silver salts of carboxylic acids containing an alkynyl group, such as silver phenylpropiolate described in JP-A-60-113235, and acetylene silver as described in JP-A-61-249044. Two or more types of organic silver salts may be used in combination.

The above organic silver salts can be used in combination in an amount of 0.01 to 10 mol, preferably O6Ol to 1 mol, per 151 mol of photosensitive halogen. The total coating amount of photosensitive silver halide and organic silver salt is 50 to 10 g in terms of silver.
LCD is suitable.

In the present invention, conventional antifoggants or photographic stabilizers can be used. An example is RD176
43 (1978) 24-25, the nitrogen-containing carboxylic acids and phosphoric acids described in JP-A-59-168442, or the mercapto compounds and mercapto compounds described in JP-A-59-111636. Metal salts, acetylene compounds described in JP-A No. 62-87957, and the like are used.

The silver halide used in the present invention may be spectrally sensitized with methine dyes and others. Dyes used include cyanine dyes, merocyanine dyes, complex cyanine dyes, complex merocyanine dyes, holopolar cyanine dyes,
Included are hemicyanine dyes, styryl dyes and hemioxonol dyes.

Specifically, U.S. Pat.
D17029 (1978) pages 12-13 and the like can be mentioned.

These sensitizing dyes may be used alone or in combination, and the combination of sensitizing dyes is particularly useful for superchromic enhancement! Often used for the purpose of ε.

Along with the enhancing dye, the emulsion may contain a dye that does not itself have a spectral sensitizing effect or a compound that does not substantially absorb visible light and exhibits supersensitization (for example, as described in U.S. Pat. .615゜641, patent application 1986-22
6294 etc.).

These sensitizing dyes may be added to the emulsion at or before chemical ripening, or as described in US Pat. No. 4.183.
It may be added before or after nucleation of silver halide grains according to No. 756 and No. 4,225.666, and the amount added is generally about 10-1 to 10-w mol per mol of silver halide.

A hydrophilic binder is preferably used for the constituent layers of the photosensitive material or dye fixing material. Examples include those described on pages (26) to (28) of JP-A-62-253159.

Specifically, transparent or translucent hydrophilic binders are preferred, such as proteins such as gelatin and gelatin derivatives, cellulose 49.1, starch, gum arabic,
Examples include natural compounds such as polysaccharides such as dextran and pullulan, polyvinyl alcohol, polyvinylpyrrolidone, acrylamide polymers, and other synthetic polymer compounds. In addition, super absorbent polymers described in JP-A-62-245260 etc., namely -〇〇〇M or -5Ox
A homopolymer of a vinyl monomer having M (M is a hydrogen atom or an alkali metal) or a copolymer of this vinyl monomer with itself or with other vinyl monomers, such as sodium meccrylate, ammonium methacrylate, and those manufactured by Sumitomo Chemical Co., Ltd. Sumikagel L-5fr) is also used. These binders can also be used in combination of 2fffi or more.

When employing a system that performs thermal development by supplying a small amount of water, the use of the above-mentioned super absorbent polymer allows rapid absorption of water. Furthermore, when a highly water-absorbing polymer is used in the dye-fixing layer or its retention IIN, it is possible to prevent the dye from being re-transferred from the dye-fixing material to other materials after transfer.

In the present invention, the amount of binder applied is 20 per 1M.
The amount is preferably 10 g or less, more preferably 7 g or less.

Structure II of the photosensitive material or dye fixing material (including the back layer) contains various polymers for the purpose of improving film properties such as dimensional stabilization, prevention of curling, prevention of adhesion, prevention of film cracking, and prevention of pressure sensitivity. It can contain latex. Specifically, Japanese Patent Publication Nos. 62-245258 and 62-13
Any of the polymer latexes described in No. 6648, No. 62-110066, etc. can be used. In particular, if a polymer latex with a low glass transition point (40 or less) is used for the mordant layer, cracking of the mordant layer can be prevented, and if a polymer latex with a high glass transition point is used for the back layer, curling can be prevented. Effects can be obtained.

In the present invention, a compound that activates development and stabilizes images can be used in the light-sensitive material. For specific compounds preferably used, see U.S. Patent Box 4,50.
No. 0,626, columns 51-52.

In systems that form images by diffusion transfer of dyes, a dye-fixing material is used together with a light-sensitive material. Even if the dye-fixing material is coated separately on a support separate from the light-sensitive material, The relationship between the light-sensitive material and the dye-fixing material, the relationship with the support, and the relationship with the white reflective layer may be coated on the same support as in US 11J.
The relationship described in column 57 of IL Patent No. 4.500.626 is also applicable to the present application.

The dye fixing material preferably used in the present invention has at least IN a layer containing a mordant and a binder. As the mordant, those known in the photographic field can be used, and specific examples thereof include U.S. Pat. The mordant described in JP-A No. 62-244043, No. 62-
Examples include those described in No. 244036 and the like.

Also, dye-receiving polymeric compounds such as those described in US Pat. No. 4,4G3.079 may be used.

The dye fixing material may be provided with auxiliary layers such as a protective layer, a release layer, and an anti-curl layer, if necessary.

In particular, it is useful to provide a protective layer.

A high boiling point organic solvent can be used in the constituent layers of the light-sensitive material and the dye-fixing material as a plasticizer, a slippery agent, or a peelability improver between the light-sensitive material and the dye-fixing material. Specifically, pages (25) and 62 of JP-A-62-253159.
-245253, etc.

Furthermore, for the above purpose, various silicone oils (all silicone oils from dimethyl silicone oil to modified silicone oil in which various organic groups are introduced into dimethylsiloxane) can be used. Examples include various modified silicone oils described in "Modified Silicone Oil" technical data P6-18B published by Shin-Etsu Silicone Co., Ltd., especially carboxy-modified silicone (product name
-3710) etc. are effective.

Also, Japanese Patent Application Laid-Open No. 62-215953, Japanese Patent Application No. 62-236
The silicone oil described in No. 87 is also effective.

Antifading agents may be used in the photosensitive materials and dye fixing materials. Examples of the antifading agents include antioxidants, ultraviolet absorbers, and certain metal complexes.

Examples of antioxidants include chroman compounds, coumaran compounds, phenol compounds (for example, hindered phenols), hydroquinone derivatives, hindered amine derivatives, and spiroindane compounds. Compounds described in JP-A-61-159644 are also effective.

Benzotriazole compounds (
U.S. Patent Box 3,533,794, etc.), 4-thiazolidone compounds (U.S. Patent Box 3,352,681, etc.)
, benzophenone compounds (JP-A-46-2784, etc.), and other JP-A-54-48535, JP-A-62-13
There are compounds described in No. 6641, No. 61-88256, and the like.

Further, the ultraviolet absorbing polymer described in JP-A No. 62-260152 is also effective.

As metal complexes, U.S. Patent Box 4.241.155,
No. 4,245,018, columns 3 to 36, No. 4,25
No. 4,195, columns 3 to 8, JP-A-62-174741, JP-A-61-88256, pages (27)-(29), Japanese Patent Application No. 1983-234103, JP-A No. 62-31096, Japanese Patent Application No. 1983 There are compounds described in No.-230596 and the like.

Examples of useful anti-fading agents are disclosed in JP-A No. 62-215272 (
125) to (137).

The anti-fading agent for preventing fading of the dye transferred to the dye-fixing material may be included in the dye-fixing material in advance, or may be supplied to the dye-fixing material from outside the photosensitive material. .

The above antioxidants, ultraviolet absorbers, and metal complexes may be used in combination.

A fluorescent brightener may be used in the light-sensitive material or dye-fixing material. In particular, it is preferable to incorporate the fluorescent brightener into the dye-fixing material or to supply it from outside the light-sensitive material.

Veenkataragean &! r dinghe
Chemistry or 5ynthetic
Dyes J No. V! Chapter 8, Japanese Unexamined Patent Publication Sho G1-143752
Examples include compounds described in No.

More specifically, examples include stilbene compounds, coumarin compounds, biphenyl compounds, benzoxacylyl compounds, naphthalimide compounds, pyrazoline compounds, and carbostyryl compounds.

Optical brighteners can be used in combination with antifade agents.

Hardeners used in constituent layers of photosensitive materials and dye-fixing materials include U.S. Pat. No. 4.678.739, column 41, especially 7.
n No. 59-116655, No. 62-2452G1,
Examples include hardeners described in Japanese Patent No. 61-18942.

More specifically, aldehyde hardeners (such as formaldehyde), aziridine hardeners, epoxy hardeners, vinyl sulfone Mm film agents (N,N'-ethylene-bis(
(vinylsulfonylacetamido)ethane, etc.), N-medylol hardeners (dimethylol urea, etc.), and polymer hardeners (compounds described in JP-A-62-234157, etc.).

Various surfactants can be used in the constituent layers of photosensitive materials and dye-fixing materials for the purposes of coating aids, improving peelability, improving slipperiness, preventing static electricity, promoting development, and the like. Specific examples of surfactants are JP-A-62-173463 and JP-A No. 62-1.
It is described in No. 83457, etc.

The constituent layers of photosensitive materials and dye-fixing materials include improved slipperiness,
Typical examples of organic fluoro compounds that may be included for the purpose of preventing static electricity, improving peelability, etc. are Japanese Patent Publication No. 57-9053, columns 8 to 17, and Japanese Patent Application Laid-Open No. 1983-1989.
Fluorine surfactants described in No. 20944, No. 62-135826, etc., or oily fluorine compounds such as fluorine oil, or tetrafluoroethylene HAJ1i
Examples include hydrophobic fluorine compounds such as solid fluorine compound resins such as.

A matting agent can be used in the photosensitive material and the dye fixing material. As a matting agent, silicon dioxide, polyolefin or polymethacrylate may be used.
In addition to the compounds described in No. 6 (page 29), benzoguanamine resin beads, polycarbonate resin beads, As resin beads, etc.
There is a compound described in No. 0065.

In addition, the constituent layers of the light-sensitive material and the dye-fixing material may contain a heat solvent, an antifoaming agent, an antibacterial agent, an antibacterial agent, a coro-hydrogen, etc. 61
-88256, pages (26) to (32).

In the present invention, an image formation accelerator can be used in the light-sensitive material and/or the dye fixing material. The image formation accelerator includes the promotion of the redox reaction between the silver salt oxidizing agent and the reducing agent, and the promotion of the redox reaction between the silver salt oxidizing agent and the reducing agent. It has functions such as promoting reactions such as the production of dyes or the release of dyes or diffusible dyes, and promoting the movement of dyes from the light-sensitive material layer to the dye fixing layer. They are classified into base precursors, nucleophilic compounds, high-boiling organic solvents (oils), thermal solvents, surfactants, and compounds that interact with silver or silver ions. However, these substance groups generally have complex i-potency and usually have a combination of the above-mentioned promoting effects.For details, see U.S. Pat. No. 4,678.
, No. 739, columns 38-40.

Examples of base precursors include salts of organic acids and bases that are decarboxylated by heat, compounds that release amines by intramolecular nucleophilic substitution reaction, Rossen rearrangement, or Beckmann rearrangement. Specific examples thereof are described in U.S. Pat.

In a system in which thermal development and dye transfer are performed simultaneously in the presence of a small amount of water, it is preferable to include a base and/or a base precursor in the dye fixing material in order to improve the storage stability of the photosensitive material.

In addition to the above, combinations of poorly soluble metal compounds and compounds that can undergo complex formation reactions with metal ions constituting the poorly soluble metal compounds (referred to as complex-forming compounds), as described in European Patent Publication 210.660, and special Kaisho Gl 23245
Compounds that generate bases by electrolysis as described in No. 1 can also be used as base precursors. The former method is particularly effective. It is advantageous to add the poorly soluble metal compound and the complex-forming compound to the light-sensitive material and the dye-fixing material separately.

Various development stoppers can be used in the light-sensitive material and/or dye-fixing material of the present invention in order to always obtain a constant image despite fluctuations in processing temperature and processing time during development.

The development stopper referred to here is a compound that neutralizes the base immediately after proper development or reacts with the base to lower the base concentration in the film and stop development, or a compound that inhibits development by interacting with silver and silver salts. It is a compound that

Specifically, an acid precursor that releases acid upon heating;
Examples include a-electron compounds that undergo a substitution reaction with coexisting bases when heated, nitrogen-containing heterocyclic compounds, mercapto compounds, and precursors thereof.

For more details, see JP-A No. 62-253159 (31) - (
It is described on page 32).

As a support for the light-sensitive material or dye-fixing material of the present invention, one that can withstand processing temperatures is used. -For boat fishing, paper and synthetic polymers (films) can be used. Specifically, polyethylene terephthalate, polycarbonate, polyvinyl chloride, polystyrene, polypropylene,
Polyimide, cellulose (e.g. triacetylcellulose) or films containing pigments such as titanium oxide, film-based synthetic paper made from polypropylene, etc., and synthetic paper made from synthetic resin pulp such as polyethylene and natural parob. Mixed paper, Yankee paper, Baryta paper, Coachite paper (especially cast coated paper), metal, cloth, glass, etc. are used.

These can be used alone, or can be used as a support laminated on one or both sides with a synthetic polymer such as polyethylene.

In addition, JP-A No. 62-253159 (29) (31
) can be used.

The surface of these supports may be coated with a wood-philic binder, alumina sol, a semiconductive metal oxide such as tin oxide, carbon black, or other antistatic agent.

Methods of exposing and recording images on photosensitive materials include, for example, using a camera to directly expose landscapes or people, exposing through reversal film or negative film using a printer or enlarger, and copying. A method of scanning and exposing an original image through a slit etc. using an exposure device of a machine, a method of exposing image information by emitting light from a light emitting diode, various lasers, etc. via an electric signal, a method of exposing image information by emitting light from a light emitting diode, various lasers, etc., image information 'k CRT, liquid crystal display, etc. There is a method of outputting the image to an image display device such as an electroluminescence display or a plasma display and exposing it directly or through an optical system.

As mentioned above, light sources for recording images on photosensitive materials include natural light, tungsten lamps, light emitting diodes, laser light sources, CRT light sources, etc., such as U.S. Pat.
The light source described in No. 26, No. 56 (Main) can be used.

Further, image exposure can also be performed using a wavelength conversion element that combines a nonlinear optical material and a coherent light source such as a laser beam. Here, nonlinear optical materials are materials that can exhibit nonlinearity between the polarization and electric field that appear when a strong optical electric field such as a laser beam is applied, and include lithium niobate, potassium dihydrogen phosphate (KDP) ), lithium iodate, inorganic compounds such as 13aBtOa,
Urine T: derivatives, nitroaniline derivatives, e.g. nitropyridine-N-oxide derivatives such as 3-methyl-4-nitropyridine-N-oxide (POM), JP-A-61
Compounds described in No.-53462 and No. 62-210432 are preferably used.

As the form of the wavelength conversion element, single crystal optical waveguide type, fiber type, etc. are known, and both are useful.

In addition, the above-mentioned image information includes image signals obtained from a video camera, electronic still camera, etc., a television signal represented by the Nippon Television Signal Standard (NTSC), and an image obtained by dividing an original image into a large number of pixels using a scanner. signal, CG,
Image signals created using a computer system such as CAD can be used.

The photosensitive material and/or the dye-fixing material may have an IT heating layer as a heating means for heat development or diffusion transfer of the dye.

In this case, the transparent or opaque heating element is
1-145544 Specification θ etc. can be used. Note that these conductive layers also function as antistatic layers.

The heating temperature in the heat development process can be developed at about 0°C to about 25°C, but it is particularly useful to use a heating temperature of about 0°C to about 180°C.The dye diffusion transfer process is performed at the same time as the heat development. In the latter case, the heating temperature in the transfer step can be in the range from the temperature in the heat development step to room temperature; More preferably, the temperature is up to about 10°C lower than the temperature at .

Dye migration can also be caused by heat alone, but a solvent may be used to promote dye migration.

Also, JP-A-59-218443, JP-A No. 61-2380
56, etc., a method in which development and transfer are performed simultaneously or continuously by heating in the presence of a small amount of solvent (particularly water) is also useful. In this method, the heating temperature is 5
The temperature is preferably 0°C or higher and the boiling point of the solvent or lower. For example, when the solvent is water, the temperature is preferably 50°C or higher and 100°C or lower.

Examples of solvents used to accelerate development and/or transfer the diffusible dye to the dye fixing layer include water or basic aqueous solutions containing inorganic alkali metal salts or organic bases (these bases may Those described in the section on formation promoters can be used. Furthermore, a low boiling point solvent or a mixed solution of a low boiling point solvent and water or a basic aqueous solution can also be used. Further, a surfactant, an antifoggant, a complex-forming compound with a sparingly soluble metal salt, etc. may be included in the solvent.

These solvents can be used in a method of applying them to dye fixing materials, photosensitive materials, or both.

The amount used is as small as the amount of Xi of the solvent that corresponds to the maximum swelling volume of the entire coated film (particularly under the setting plate, which is the amount of the solvent TILffi that corresponds to the maximum swelling volume of the entire coated film minus 31ffi of the total coated film). good.

As a method for applying a solvent to the photosensitive layer or the dye fixing layer, there is, for example, the method described in JP-A-61-147244, page (26). Further, the solvent can be incorporated in advance into the photosensitive material, the dye fixing material, or both, such as by encapsulating the solvent in microcapsules.

Furthermore, in order to promote dye transfer, a method may be adopted in which a hydrophilic thermal solvent that is solid at room temperature and dissolves at high temperature is incorporated into the light-sensitive material or dye fixing material. a The aqueous thermal solvent may be incorporated into either the photosensitive material or the dye-fixing material, or may be incorporated into both.The layer in which it is incorporated may also be an emulsion layer, an intermediate layer, a protective layer, or a dye-fixing layer. , it is preferable to incorporate it into the dye fixing layer and/or its adjacent layer.

Examples of hydrophilic heat solvents include ureas, pyridines, amides, sulfonamides, imides, alnyls, oximes, and other heterocycles.

Further, in order to promote dye transfer, a high boiling point organic solvent may be included in the light-sensitive material and/or the dye fixing material.

Heating methods in the development and/or transfer process include contact with a heated block or plate, contact with a hot plate, hot presser, heat roller-halogen lamp heater, infrared and far-infrared lamp heater, etc. , passing through a high-temperature atmosphere, etc.

The pressure conditions and method of applying pressure when overlapping the photosensitive material and the dye-fixing material and bringing them into close contact are described in Japanese Patent Application Laid-Open No. 2003-120001/-/Hiroshi 7-.
The method described in No. 4L≠ (, 27) can be applied.

Any of a variety of Fi thermal development equipment can be used to process the photographic elements of this invention. For example, Tokukai Akira! Tar7ha■No.7,
same! Tar777! Da 7, same! Tar/I/JjJ issue, same to-iryri issue, Jitsukaiaki≦Koko! The apparatus described in Tada μ issue etc. is preferably used.

〔Example〕

Hereinafter, the present invention will be specifically explained with reference to Examples.

<Example 1> The method of preparing emulsion [I] for the first NI will be described.

A well-stirred gelatin aqueous solution (gelatin-〇?, potassium bromide/?, and (J)1 in water r00rttl)
(CH2) 28 ((J Kashi 2) 20HO, add JP!
The following solutions (I), (II) and (■) were simultaneously added at equal flow rates over 30 minutes to a 0'CK heat-retaining solution. A monodisperse silver bromide emulsion having an average grain size of 01 μm and adsorbed with a dye was thus prepared.

After washing with water and desalting, lime-treated ossein gelatin-θ2 was added to adjust the pH to R and J.
Incubate at °C, sodium thiosulfate, chloroauric acid 0.
．． 0/% aqueous solution 7d% μm hydroxy-4-methyl-
/, J, ja, 7-chitrazaindene/add Oki,
≠! Chemical sensitization was performed for minutes. The yield of emulsion was ≦3j2.

Dye (a) After adding the dye (-), a methanol solution (IF) of the following sensitizing dye was added. In this way, a dye with an average particle size of O-Sμ was adsorbed. A monodisperse cubic emulsion was prepared.

After washing with water and desalting, add gelatin or alcohol and adjust the pH to t-a.
7. sp A g. After adjusting to lr, to.

Remember to perform chemical sensitization with o'C. The chemicals used at this time were 1 ooq of triethylthiourine Z/, a and g-hydroxy-t-methyl-/, J, Ja, 7-chitrazaindene, and the ripening time was 11 minutes. Also, the yield of this emulsion is t
It was 36f.

(Drug A) Next, the emulsion i) for the third layer will be described.

Add gelatin-〇mqs potassium bromide 0.3Of, sodium chloride +r and the following chemicals AQ, 0/!f into a well-stirred aqueous solution (water 7JOxt to 60.0
Add gelatin JOY, potassium bromide Jt, and H (J
(CH2)28(CH2)28(CH2)20Ho,
The following (I
) and (■) were added simultaneously over 20 minutes.

After that, the following solution (III) and (tV)i were added at the same time for 3
Added over 0 minutes. Water washing, desalination and ash treatment Ossein gelatin-O? Garoe pH J, J, pAg t, j
After adjusting the temperature, sodium thiosulfate and chloroauric acid and monohydro-7-1r-methyl-1.3°3a,7-titrazaindene were added for optimal chemical sensitization. In this way, a monodisperse ♂hedral silver iodobromide emulsion (it)t with average grain sizes o and rO μm was produced.

Next, how to prepare emulsion (III) for the first layer will be described.

A well-stirred gelatin aqueous solution (water AOOy1) Next, we will explain how to make a gelatin dispersion of a dye-donating substance. ?, tricyclohexylphosphine) i10f was weighed, ethyl acetate j7d was added,
Dissolve it by heating to about 0°C to make a homogeneous solution. This solution and 70% solution of lime-treated gelatin/Or, water A
! me and dodecylbenzenesulfone powder sodium 7
．． 72 and then dispersed with a homogenizer at 110,000 rpm for io minutes. This dispersion is called a yellow dye-providing substance dispersion.

Dispersions of magenta and cyan dye-providing substances are similar to dispersions of yellow dye-providing substances, such as magenta dye-providing substance (-) or cyan dye-providing substance (/).
I made it using 1).

With these, color photosensitive material 1 with a multilayer structure shown in Shishi/
I made 0/.

Water-soluble polymer (1) 8 (to J3 Surfactant (1)” Aerosol OT Surfactant (K)” Surfactant ( 3)” Surfactant (4I)” Reducing agent (1) Next, we will discuss how to make the dye-stabilized material.

A dye fixing material R-i was prepared by coating on a paper support laminated with polyethylene according to the composition shown in the following table.

Hardener (1) Corbis (vinylsul7-onylacetamide) ethane High-boiling organic solvent (i) 4 and tricycloheyasil phosphate polymer (1) Antifoggant (i)* COC, Hll Antifoggant (co)” Surfactant +4 Surfactant 0 Silicone oil “1 Surfactant”2 Aerosol OT 〃 Bone 3 Polymer “5 Vinyl alcohol sodium acrylate copolymer (7!
721 molar ratio) Lotus 7 Dechustran (molecular t 70,000) Mordant 6 C3) 1° High boiling point organic solvent 18 Leo 7 Male FjC Ajinomoto Co., Ltd.) Hardener 9 [Table Co] Matting agent 10 Benzoguanamine resin ( Average particle size/jμ) Next, as shown in [Table], the compound As-
/, l-1≠, /7 or the above electron transfer agent (X
-J) was increased, and heat-developable photosensitive materials 102 to 101 were prepared, each having the same composition as photosensitive material 10/, except for the following.

B and G, in which a tungsten bulb is used in the above-mentioned multilayered color photosensitive material, and the density changes continuously.

Exposure was made for 1710 seconds at j000 lux through a dark and gray color separation filter.

While feeding this exposed photosensitive material at a linear speed of -omm7sec, the emulsion surface is coated with /! d/m2 of water was supplied using a wire parer, and then the injured material and the membrane surface were immediately placed on top of each other so that they were in contact with each other.

/- was heated for seconds using a heat roller whose temperature was adjusted so that the temperature of the water-absorbed film was rt'c. Next, when it was peeled off from the image-receiving material, clear images of blue, green, red, and gray were uniformly obtained on the image-receiving material, corresponding to the B, G%, and gray color separation filters.

The maximum fik degree (Dmax) and minimum density (Dm) of the gray part
Measurements were made for each color: in)l, cyan, magenta, and yellow. The results are shown in [Table J].

(Ken J) As shown in the photosensitive materials Nos. 10J to 107 containing the compounds of the present invention, staining of color images was reduced.

Further, the photosensitive material io to which a reducing agent other than the general formula (1) of the present invention is added (that is, the amount of the electron transfer agent (X-s) is increased) is
r has a small effect of reducing color image stain, and 7jDmax
will also be greatly reduced.

<Example 2> Using the same emulsion, dye-donating substance, electron donor, and electron transfer agent as in color photosensitive material 10/ of Example 1, a multilayer color photosensitive material-O7 having the structure shown in the table was prepared. . [Table D] Unless otherwise specified, the same additives as in Photosensitive Material 10/ were used.

The W machine silver salt emulsion was prepared as follows.

Gelatinko Of and ginseng-acetylaminophenylpropiolic acid! , 001% sodium hydroxide aqueous solution 10
00yttl and ethanol JOOd. This solution was kept at 4 to'''C and stirred.
,j? A solution of 00 yd of water was added over 1 minute.

Excess salt was then removed by sedimentation. Thereafter, the pH was adjusted to d and J to obtain an organic silver salt dispersion with a yield of JOOf.

In addition, antifoggant precursor (1) + 1 having the following structure was added to the dye-donating substance in an amount of O6 times in mole, and the mixture was dispersed in oil together with the dye-donating substance and the electron donor by the method described in Example.

Anti-cazori agent precursor (1) flammable solvent (1) ” Benzene sulfonamide base precursor (1) “ ≠-Chlorphenylsulfonylacetic acid rinidine reducing agent (2)” Next, dye fixing material (R-, 2) I will explain how to make it.

Dissolve 10f of poly(methyl acrylate-N,N,N-)dimethyl-N-vinylbenzylammonium chloride (the ratio of methyl acrylate and vinylbenzylammonium chloride is /:/) in JOOd water,
% lime-treated gelatin and 100% lime-treated gelatin. A hardening agent was added to this mixture, and the mixture was laminated with polyethylene in which titanium dioxide was dispersed, and the mixture was uniformly coated on a paper support to a wet film thickness of 0 μm. After drying, this sample is used as a dye fixing material (R-co) having a mordant layer.

Photosensitive material-O/, [Table! Photosensitive material -207 having exactly the same composition as photosensitive material 20/ was prepared, except that the compound of the present invention was added as shown in ].

h [Table! ] Ko02 As −/ / , J , j
O, OJko0JAS-/ko, 4t
o, ozJO4tAS-/ko/, J,
j O,O4jko0jAS-/JJ,≠
0110-Obu As-μ /, J, I
O, OJ! Ko07 As-/7/, J,
I O, 0! A good positive image of J was obtained.

Gray, some cyan, magenta, and yellow Dmax
, Dmjn are measured and the results are shown as (fij)K.

ia after exposing the photosensitive material in the same manner as in Example 1.

'CK was heated uniformly on a heat block for 30 seconds.

10y per im on the membrane side of the dye fixing material (Ko-ko)
After supplying water (d), the heat-treated photosensitive materials were stacked on the fixing material so that the film surfaces were in contact with each other.

After that, the linear velocity/λm was applied to a laminator heated to tro@c.
After passing through the material at a speed of m/sec and then peeling off both materials, the S/N of each photosensitive material was on the dye fixing material.
In both cases, it can be seen that the stain is decreasing.

Claims (1)

[Scope of Claims] A heat-developable color having on a support at least a photosensitive silver halide, a binder, a non-diffusible dye-donating compound that releases a diffusible dye when reduced, an electron donor, and an electron transfer agent. A heat-developable color photosensitive material further comprising a compound represented by the following general formula [I]. General formula [I] ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ In the formula, R_1 and R_2 represent hydrogen atoms, each represents a substituted or unsubstituted alkyl group, aryl group, acyl group, or alkoxycarbonyl group, and R_3 to R_5 is hydrogen atom, hydroxyl group, halogen atom, nitro group, sulfo group, cyano group,
Substituted or unsubstituted alkyl groups, aryl groups,
Represents an alkoxy group, an aryloxy group, an acyl group, an acyloxy group, a carbonate group, and an amino group. Further, when R_1 or R_2 is a hydrogen atom, one or both of the hydroxyl groups may be dissociated to form a salt with a monovalent to trivalent metal ion.