JPH04280247A - Silver halide color photosensitive material - Google Patents

Abstract

PURPOSE:To enhance the sharpness and improve the preservation stability by containing at least one compound which releases a development inhibitor by the reaction of an oxide body of the developing main ingredient in at least one layer of photograph constituting layers. CONSTITUTION:In at least one layer of photograph constituting layers, at least one compound expressed by formula I which releases a development inhibitor by the reaction with an oxide body of the developing main ingredient is contained. In this case, CP represents a coupler residual group reactable with the oxide body of the coloring developing main ingredient, TIME represents a timing group bonded in the coupling position with CP, and 1 represents 0 or 1. Z represents a non-metal group required for forming a tetrazole, triazole, or imidazole ring, and R represents an aliphatic group, aromatic group, or heterocyclic group.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silver halide color photographic material, and more particularly to a silver halide color photographic material having improved sharpness and storage stability.

0002

BACKGROUND OF THE INVENTION In recent years, there has been a strong desire to develop color photographic materials that are highly sensitive and have excellent sharpness and color reproducibility.

As a means for improving sharpness, it is known to use a compound (hereinafter referred to as a DIR coupler) which reacts with an oxidized form of a color developing agent and releases a development inhibitor.

By incorporating the compound into the silver halide emulsion layer, I. I. It is also well known that the E effect provides improved color reproduction. However, when these DIR couplers are used, the development inhibitor released during color development diffuses from the photosensitive material into the processing solution and accumulates, resulting in the processing solution exhibiting a development inhibiting effect, which cannot be achieved by running processing of the photosensitive material. There was a drawback in that it was difficult to always obtain a constant gradation.

[0005] JP-A-57-151944, JP-A No. 58-2
No. 05150, No. 60-218644, No. 60-22
No. 1750, No. 61-11743 and U.S. Patent No. 4,7
No. 82,012, etc., propose a method for solving such problems.

These are DIR couplers that have a group at the coupling position that has the property of decomposing into a compound that does not affect photographic properties after a compound with development-inhibiting properties separated from the coupling position flows out into the processing solution. It is.

It is certain that with these DIR couplers, even when a large amount of light-sensitive material is subjected to running processing, the decrease in sensitivity is reduced, and the contamination of the color developing solution due to the accumulation of development inhibitors is considerably reduced. be.

However, light-sensitive materials containing these DIR couplers have insufficient sharpness, and have drawbacks such as increased fog and decreased sensitivity, especially during storage at high temperatures over time. Further, the performance of the DIR coupler itself cannot be said to have reached a satisfactory level, as the interlayer effect is insufficient and the γ of the emulsion layer to which the coupler is added is reduced.

[0009]

[Problems to be solved by the invention] As mentioned above, by using the known DIR coupler, the sharpness is good, and even when stored at high temperatures over time, the sensitivity does not decrease and fog increases. At present, no silver halide color photographic light-sensitive material has been obtained that does not.

[0010] Therefore, the object of the present invention is to have good sharpness and
An object of the present invention is to provide a silver halide color photographic material with improved storage stability.

[0011]

[Means for Solving the Problems] As a result of intensive studies, the present inventors have found that the objects of the present invention can be achieved by the following method, and have completed the present invention.

That is, in a silver halide color photographic light-sensitive material having at least one silver halide emulsion layer on a support, at least one of the photographic constituent layers contains a compound represented by the following general formula [I]: This was achieved by a silver halide color photographic light-sensitive material characterized by containing at least one compound that releases a development inhibitor upon reaction with an oxidized form of a developing agent.

[0013]

[Case 2]

In the formula, Cp represents a coupler residue that can undergo a coupling reaction with the oxidized color developing agent, and TIME represents Cp.
represents a timing group bonded at the coupling position with p,
l represents 0 or 1. Z represents a nonmetallic atom group necessary to form a tetrazole, triazole, or imidazole ring. R represents an aliphatic group, an aromatic group, or a heterocyclic group.

The present invention will be explained in detail below.

In the coupler represented by general formula [I], the coupler residue represented by Cp includes a residue that produces a yellow, magenta or cyan dye, and a residue that produces a substantially colorless product. be.

Among the coupler residues represented by Cp, typical yellow coupler residues are disclosed in US Pat.
No. 298,443, No. 2,407,210, No. 2,8
No. 75,057, No. 3,048,194, No. 3,26
No. 5,506, No. 3,447,928 and
Agfa Mittelung (Band II)” (Fa
rbkuppler eineLiteraturuv
ersiecht Agfa Mitteilung (
Band II)) pages 112-126 (1961). Among these, acylacetanilides, such as benzoylacetanilide and bivaloylacetanilide, are preferred.

Typical magenta coupler residues are those disclosed in US Pat. Nos. 2,369,489 and 2,343,7.
No. 03, No. 2,311,182, No. 2,600,78
No. 8, No. 2,908,573, No. 3,062,653
No. 3,152,896, No. 3,519,429, No. 3,725,067, No. 4,540,654,
JP-A-59-162548 and the above-mentioned Agfa Mi
tteilung (Band II) pp. 126-156 (1961). Of these,
Pyrazolones or pyrazoloazoles (eg, pyrazoloimidazole, pyrazolotriazole, etc.) are preferred.

Typical cyan coupler residues are those disclosed in US Pat. Nos. 2,367,531 and 2,423,73.
No. 0, No. 2,474,293, No. 2,772,162
No. 2,395,826, No. 3,002,836, No. 3,034,892, No. 3,041,236,
No. 4,666,999 and the above-mentioned Agfa Mitt.
eilung (Band II) pages 156-175 (
1961). Among these, phenols or naphthols are preferred.

Typical coupler residues forming substantially colorless products are described, for example, in British Patent 861,1.
No. 38, U.S. Patent No. 3,632,345, U.S. Patent No. 3,928
, No. 041, No. 3,958,993 and No. 3,961
, No. 959, etc. Among these, cyclic carbonyl compounds are preferred.

Typical timing groups represented by TIME have photographic utility, for example, by an intramolecular nucleophilic substitution reaction disclosed in US Pat. Examples include those that release a group, and those that release a photographically useful group through an electron transfer reaction along a conjugated chain as disclosed in JP-A-56-114946 and JP-A-57-154234. others,
JP 57-188035, JP 58-98728,
No. 59-206834, No. 60-7429, No. 60
-214358, 50-225844, 60-
No. 229030, No. 60-233649, No. 60-2
Also included are the timing groups disclosed in No. 37446 and No. 60-237447.

The yellow coupler residue represented by Cp in the general formula [I] is represented by the following general formulas [II] and [
III] is preferred.

[0023]

[Chemical formula 3]

In the above general formulas [II] and [III], R3 and R4 represent, for example, alkyl, cycloalkyl, aryl, heterocycle, or halogen atom, and these represent oxygen atom, nitrogen atom, sulfur atom, or the bond listed below. They may also be bonded via a group.

Examples of the bonding group include acylamino, carbamoyl, sulfonamide, sulfamoyl, sulfamoylcarbonyl, carbonyloxy, oxycarbonyl,
Examples include groups such as ureido, thioureido, thioamide, sulfone, and sulfonyloxy. Further, the alkyl, cycloalkyl, aryl, and heterocycle may further have a substituent as described below.

That is, halogen atom, nitro, cyano, alkyl, alkenyl, cycloalkyl, aryl, alkoxy, aryloxy, alkoxycarbonyl, aryloxycarbonyl, carboxyl, sulfo, sulfamoyl, carbamoyl, acylamino, ureido, alkoxycarbonylamino, sulfone. Examples include amide, heterocycle, arylsulfonyl, alkylsulfonyl, arylthio, alkylthio, alkylamino, anilino, hydroxyl, imide, and acyl groups.

[0027] When there are two or more R3 and R4, they may be the same or different.

[0028] In the above general formula, * represents (TIME)
Indicates the site where it binds.

As the magenta coupler residue represented by Cp in the general formula [I], the following general formulas [IV] and [V
], [VI] and [VII] are preferred.

[0030]

[C4]

In the above general formulas [IV] to [VII], R3 and R4 are R3 and R4 of the general formulas [II] and [III].
It is synonymous with 4.

As the cyan coupler residue represented by Cp in the general formula [I], the following general formula [VIII], [
IX] and [X] are preferred.

[0033]

[C5]

[0034] In the above [VIII] to [X], R3,
R4 has the same meaning as R3 and R4 in general formulas [II] and [III].

As the coupler residue forming the substantially colorless product represented by Cp in the general formula [I], those represented by the general formulas [XI] to [XIV] are preferred.

[0036]

[C6]

In the general formula [XI], R5 represents, for example, a hydrogen atom, an alkyl group, an aryl group, a halogen atom, an alkoxy group, an acyloxy group, or a heterocyclic group, and X represents an oxygen atom or =NR6. R6 represents an alkyl group, an aryl group, a hydroxyl group, an alkoxyl group or a sulfonyl group. Z represents a group of nonmetallic atoms necessary to form a 5- to 7-membered carbon ring (eg, indanone, cyclopentanone, cyclohexanone, etc.) or a heterocycle (eg, piperidone, pyrrolidone, hydrocarbostyryl, etc.).

In the general formula [XII], R5 and X have the same meaning as R5 and X in the general formula [XI], and R7 represents an alkyl group, an aryl group, a heterocyclic group, a cyano group, a hydroxyl group, an alkoxy group, an aryl Represents an oxy group, a heterocyclic oxy group, an alkylamino group, a dialkylamino group, or an anilino group.

In the general formula [XIII], R8 and R
9 may be the same or different, and represents, for example, an alkoxycarbonyl group, a carbamoyl group, an acyl group, a cyano group, a formyl group, a sulfonyl group, a sulfinyl group, a sulfamoyl group, an ammonium group, or an -N heterocycle. A represents a group of nonmetallic atoms necessary to form a 5- to 7-membered heterocycle (eg, phthalimide, triazole, tetrazole, etc.) together with the nitrogen atom.

In the general formula [XIV], R10 represents, for example, an alkyl group, an aryl group, anilino group, an alkylamino group, or an alkoxy group, and B represents an oxygen atom, a sulfur atom, or a nitrogen atom.

TIMEs useful in the present invention include, but are not limited to, those represented by the following general formulas [XV], [XVI] and [XVII].

[0042]

[C7]

In the general formula [XV], X represents an atomic group necessary to complete a benzene ring or naphthalene ring which may have a substituent.

Y is bonded to the coupling position of the coupler residue represented by Cp in general formula [I], and R11
, R12 and R13 each represent a hydrogen atom, an alkyl group or an aryl group.

In the general formula [XVI], Y, R11,
Each R12 has the same meaning as in general formula [XV]. R14 is, for example, a hydrogen atom, an alkyl group, an aryl group, an acyl group,
A sulfonyl group, an alkoxycarbonyl group, a heterocyclic group, and R15 is, for example, a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, an alkoxy group, an amino group, an acid amide group, a sulfonamide group, a carboxyl group, an alkoxycarbonyl group, Indicates a carbamoyl group and a cyano group.

[0046] Moreover, this timing group has the general formula [XV]
Similarly, Y is bonded to the coupling position of the coupler residue represented by Cp in the general formula [I].

Next, an example of a timing group that releases a development inhibitor group by an intramolecular nucleophilic substitution reaction is shown by the general formula [XVII].

General formula [XVII] -Nu-X-E- In the formula, Nu is a nucleophilic group having an electron-rich oxygen, sulfur or nitrogen atom, and is represented by Cp in the general formula [I]. is attached to the coupling position of the coupler residue. E is an electrophilic group having an electron-poor carbonyl, thiocarbonyl, phosphinyl or thiophosphinyl group and is bonded to the sulfur atom to the development inhibitor group. X has a steric relationship with Nu and E, and in the general formula [I], from the coupler residue represented by Cp, Nu
is a bonding group that, after being released, undergoes an intramolecular nucleophilic reaction involving the formation of a 3- to 7-membered ring, thereby releasing the development inhibitor.

In the general formula [I], examples of the aliphatic group represented by R include an alkyl group, an alkenyl group, and a cycloalkyl group. Examples of the alkyl group include methyl, ethyl, i-propyl, n-propyl, butyl, pentyl, and octyl groups. Examples of alkenyl groups include vinyl group, allyl group, isopropenyl group,
-butenyl group. Examples of the cycloalkyl group include cyclopentyl, cyclohexyl, and cycloheptyl groups.

In the general formula [I], the aromatic group represented by R is, for example, phenyl or naphthyl, and the heterocyclic group is quinolyl or isoquinolyl, any of which may have a substituent. . Examples of substituents include halogen atoms, nitro, cyano, alkyl,
alkenyl, aryl, alkoxy, aryloxy,
Examples include alkoxycarbonyl, carboxyl, sulfamoyl, carbamoyl, acylamino, ureido, sulfonamide, heterocycle, hydroxyl, alkylthio, arylthio, alkylsulfonyl, and arylsulfonyl groups. Among R, preferred is unsubstituted alkyl.

Typical examples of the couplers represented by the general formula [I] are shown below, but the invention is not limited thereto.

[0052]

[Chemical formula 8]

[0053]

[Chemical formula 9]

[0054]

[Chemical formula 10]

[0055]

[Chemical formula 11]

[0056]

[Chemical formula 12]

[0057]

[Chemical formula 13]

Next, the synthetic route and method of the compound represented by the general formula [I] will be illustrated.

Synthesis Example 1 (Synthesis of Exemplified Compound No. 5)

[
0060

[Chemical formula 14]

[0061] 8.1 g of compound [A] was added to 5 g of acetonitrile.
1.1 g of propiolic acid ethyl ester was added at 40° C. over 1 hour, and the mixture was further stirred for 5 hours. The reaction solution was poured into 200 ml of ice water, and the precipitated solid was filtered off and dried. The dried product was purified by column chromatography (silica gel system) to obtain 4.1 g of the desired product (pale yellow solid).

Synthesis Example 2 (Synthesis of Exemplified Compound No. 12)

[0063]

[Chemical formula 15]

[0064] 7.1 g of compound [B] was added to 5 g of acetonitrile.
0 ml, 1.1 g of propiolic acid ethyl ester was added at room temperature over 1 hour, and the mixture was further stirred for 20 hours. The reaction solution was poured into 200 ml of ice water, and the precipitated solid was filtered and dried. The dried product was purified by column chromatography (silica gel system) to obtain 5.1 g of the desired product (light brown solid).

In the above synthesis example, the final product was confirmed to be the desired product by mass spectra and NMR spectra.

The DIR coupler according to the present invention can be contained in any layer in the photographic material, such as the silver halide emulsion layer and/or the non-photosensitive hydrophilic colloid layer, but is preferably contained in the silver halide emulsion layer. Good to use. More preferably, it is used in a red-sensitive silver halide emulsion layer and/or a blue-sensitive silver halide emulsion layer.

In order to incorporate the DIR coupler of the present invention into the hydrophilic colloid layer of a color photosensitive material, for example, known dibutyl phthalate, tricresyl phosphate,
High boiling point solvents such as dinonylphenol and butyl acetate,
The DIR coupler according to the present invention is dissolved in a mixture with a low-boiling point solvent such as propionic acid, either alone or in combination, and then mixed with an aqueous gelatin solution containing a surfactant, and then mixed with a high-speed rotating mixer. Alternatively, after emulsifying and dispersing using a colloid mill or ultrasonic dispersion machine, it can be added directly to the emulsion, or after setting the emulsified dispersion, it can be shredded and washed with water, and then added to the emulsion. good.

The amount of DIR coupler used according to the present invention is:
The content is preferably from 0.005 to 10 mol%, more preferably from 0.01 to 5 mol%, per mol of silver halide.

The DIR couplers according to the present invention may be used alone or in combination of two or more.

As the silver halide emulsion used in the light-sensitive material of the present invention, any conventional silver halide emulsion can be used. The emulsion can be chemically sensitized by conventional methods, and can be optically sensitized to a desired wavelength range using a sensitizing dye.

Antifoggants, stabilizers, etc. can be added to the silver halide emulsion. Gelatin is advantageously used as binder for the emulsion.

The emulsion layer and other hydrophilic colloid layers can be hardened, and can also contain a plasticizer and a dispersion (latex) of a water-insoluble or sparingly soluble synthetic polymer.

A coupler is used in the emulsion layer of a color photographic light-sensitive material.

Furthermore, by coupling with a colored coupler having a color correction effect, a competitive coupler, and an oxidized form of a developing agent, a development accelerator, a bleach accelerator, a developer, a silver halide solvent, a toning agent, a hardener, etc. Compounds that release photographically useful fragments such as film agents, fogging agents, antifogging agents, chemical sensitizers, spectral sensitizers and desensitizers can be used.

The photosensitive material can be provided with auxiliary layers such as a filter layer, an antihalation layer, and an antiirradiation layer. These layers and/or the emulsion layer may contain dyes that are washed out of the light-sensitive material or bleached during the development process.

A matting agent, a lubricant, an image stabilizer, a surfactant, a color antifoggant, a development accelerator, a development retardant and a bleach accelerator can be added to the photosensitive material.

As the support, paper laminated with polyethylene or the like, polyethylene terephthalate film, baryta paper, cellulose triacetate, etc. can be used.

To obtain a dye image using the light-sensitive material of the present invention, commonly known color photographic processing can be performed after exposure.

[0079]

[Examples] Next, the present invention will be specifically explained with reference to Examples, but the embodiments of the present invention are not limited thereto.

Example 1 The amounts of various additives added in silver halide color photographic materials are expressed in moles per mole of silver unless otherwise specified.

Sample 1 of a multilayer color photographic material was prepared by sequentially coating each layer having the composition shown below on a triacetylcellulose film support from the support side.

First layer: Antihalation layer (HC) Gelatin layer containing black colloidal silver.

Second Layer: Intermediate Layer (IL) Gelatin layer containing an emulsified dispersion of 2,5-di-t-octylhydroquinone.

Third layer: low-sensitivity red-sensitive silver halide emulsion layer (RL) Ag containing 6.0 mol% of AgI with an average grain size of 0.30 μm
Monodisperse emulsion consisting of BrI (emulsion 1)
…Silver coating amount
1.8g/m2 Sensitizing dye I

6×10-5
Sensitizing dye II

1.0×10-5 Cyan coupler (C-1)
0.06 Colored cyan coupler (CC-1)
0.003 DIR compound (D-1)
0.0035
DIR compound (D-2)
0.002 4th layer: High sensitivity red-sensitive silver halide emulsion layer (RH) Average grain size 0.5 μm, AgBrI containing 7.0 mol% AgI
A monodisperse emulsion consisting of (Emulsion II)
...Silver coating amount 1.3g/m2 Sensitizing dye I

3×10-5
Sensitizing dye II

1.0×10-5 Cyan coupler (C-1)
0.02 Colored cyan coupler (CC-1)
0.0015 DIR
Compound (D-1)
0.001 Fifth layer: Intermediate layer (IL) A gelatin layer with the same composition as the second layer.

6th layer: low-sensitivity green-sensitive silver halide emulsion layer (GL) (emulsion I)
…Silver coating amount
1.5g/m2 Sensitizing dye III

2.5×10-5
Sensitizing dye IV

1.2×10-5 Magenta coupler (M-1)
0.050 Colored magenta coupler (CM-1)
0.009 D.I.
R compound (D-1)
0.0010
DIR compound (D-3)
0.00
30 7th layer: High-sensitivity green-sensitive silver halide emulsion layer (GH)
(Emulsion II)
…Silver coating amount
1.4g/m2 Sensitizing dye III

1.5×10-5
Sensitizing dye IV

1.0×10-5 Magenta coupler (M-1)
0.020 Colored magenta coupler (CM-1)
0.002 DIR compound (D-3)
0.0010 8th layer: yellow filter layer (YC) gelatin layer containing yellow colloidal silver and an emulsified dispersion of 2,5-di-t-octylhydroquinone 9th layer: low-sensitivity blue-sensitive silver halide emulsion layer ( BL) Monodisperse emulsion consisting of AgBrI with an average grain size of 0.48 μm and containing 6 mol% of AgI (Emulsion III)
...Silver coating amount 0.9g/m2 Sensitizing dye V

1.3×10-5
Yellow coupler (Y-1)
0.29 10th layer: High sensitivity blue-sensitive emulsion layer (BH) average grain size 0.8
μm, monodispersed emulsion consisting of AgBrI containing 15 mol% of AgI (emulsion IV)
...Silver coating amount 0.5g/m2 Sensitizing dye V

1.0×10-5
Yellow coupler (Y-1)
0.08
DIR compound (D-2)

0.0015 11th layer: 1st protective layer (Pro-1) Silver iodobromide (AgI 1 mol%, average particle size 0.7 μm) ... Silver coating amount 0.5 g/m2 Ultraviolet absorber UV-1, UV- 2(1
: Gelatin layer containing 1).

Twelfth layer: Second protective layer (Pro-2) Gelatin layer containing polymethyl methacrylate particles (average particle size 1.5 μm) and formalin scavenger (hydantoin).

In addition to the above-mentioned components, a gelatin hardening agent (2,4-dichloro-6-hydroxy-s-triazine sodium salt) and a surfactant were added to each layer.

Furthermore, Samples 2 to 7 were prepared in the same manner as Sample 1, except that the DIR compound (D-1) contained in the third and fourth layers of Sample 1 was changed to the DIR compound shown in Table 1. Created.

The compounds contained in each layer of each of the above samples are as follows.

Sensitizing dye I: anhydro-5,5'-dichloro-9-ethyl-3,3'-di-(3-sulfopropyl)thiacarbocyanine hydroxide Sensitizing dye II: anhydro-9-ethyl- 3,3'-di-(3-sulfopropyl)-4,5,4',5'-dibenzothiacarbocyanine hydroxide sensitizing dye III: anhydro-5,5'-diphenyl-
9-ethyl-3,3'-di-(3-sulfopropyl)-
Oxacarbocyanine hydroxide sensitizing dye IV: anhydro-9-ethyl-3,3'-di-(3-sulfopropyl)-5,6,5',6'-dibenzoxacarbocyanine hydroxide sensitizing dye V :Anhydro-3,3'-di-(3-sulfopropyl)-4,5-benzo-5'-methoxythiacyanine hydroxide

[0091]

[Chemical formula 16]

[0092]

[Chemical formula 17]

[0093]

[Chemical formula 18]

[0094]

[Chemical formula 19]

Some of Samples 1 to 7 thus obtained were stored for 7 days under conditions of 55°C and 20% RH (referred to as 55°C treatment), and some were stored under normal indoor conditions for 7 days. After that, wedge exposure was performed using white light, and then the following development treatment was performed.

Treatment process (38°C)
Processing time Color development
Bleach for 3 minutes and 15 seconds
Wash with water for 6 minutes and 30 seconds
Fixed for 3 minutes and 15 seconds
6 minutes 30 seconds water
Washing 3 minutes 15 seconds Stabilization 1 minute 3
0 second drying The composition of the treatment liquid used in each treatment step is as follows.

[Color developer] 4-amino-3-methyl-N-ethyl-N-(β-hydroxyethyl) aniline sulfate

4.75g anhydrous sodium sulfite

4.25g Hydroxylamine 1/2 sulfate
2.0g anhydrous calcium carbonate

37.5g Sodium Bromide

1.3g Nitrilotriacetic acid trisodium salt (monohydrate)
2.5g potassium hydroxide

Add 1.0 g of water to make 1 liter, and adjust to pH 10. using potassium hydroxide or 20% sulfuric acid.
Adjust to 20.

[Bleach solution] Ethylenediaminetetraacetic acid iron ammonium salt
100.0g Ethylenediaminetetraacetic acid diammonium salt
10.0g ammonium bromide

150.0g glacial acetic acid

10
．． Add 0ml water to make 1l and use ammonia water to pH = 6
．． Adjust to 0.

[Fixer] Ammonium thiosulfate
175
．． 0g anhydrous sodium sulfite

8.5g Sodium metasulfite

Add 2.3 g of water to make 1 liter, and use acetic acid to make p
Adjust to H=6.0.

[Stabilizer] Formalin (37% aqueous solution)
1.
5ml Konidax (manufactured by Konica)
7
．． Add 5 ml water to make 1 liter.

For each developed sample, the sensitivity and fog of the red light-sensitive layer were measured using an optical densitometer PDA-65 (manufactured by Konica Corporation). At the same time, image sharpness was also measured. Sharpness was determined by the MTF of the dye image and expressed as a relative value of MTF at 30 lines/mm (Sample 1 is 100). Specific sensitivity, fog, and sharpness are shown in Table 1.

[0102]

[Table 1]

The specific sensitivity in Table 1 is the relative value of the reciprocal of the exposure amount that gives fog density + 0.10 density, and sample 1 is 100
The value is shown as .

From Table 1, Samples 3 to 7 containing the couplers of the present invention have significantly improved sharpness compared to Comparative Samples 1 and 2, less fogging due to heat during storage, and higher sensitivity. It is clear that the decrease in

[0105] Further, even when the sample according to the present invention was subjected to running development treatment, almost no decrease in sensitivity was observed.

Example 2 A basic sample was prepared by multilayer coating on triacetylcellulose in the following order.

(1) C-20 as a cyan coupler
．． 5 g of red-sensitive silver iodobromide emulsion layer containing 2.4 g of gelatin and 1.6 g of silver halide.

(2) 0.5 g of gelatin and 2,5-di-
Gelatin interlayer containing 0.1 g of t-octylhydroquinone.

(3) Y-1 1 as a yellow coupler
．． A blue-sensitive silver iodobromide emulsion layer containing 70 g of gelatin, 2.4 g of gelatin, and 1.6 g of silver halide.

(4) Protective layer consisting of 0.8 g of gelatin.

Among the constituent layers of the multilayer coating photosensitive material, known DIR couplers (D-5, D-6) and the coupler according to the present invention were added to the third layer containing the yellow coupler as shown in Table 2. Add according to the amount, 6 kinds of samples 8 to 13
was created.

Each sample was divided into two parts, one sample was subjected to wedge exposure with white light, and the other sample was subjected to wedge exposure with red light.

[0113] Then, it was treated in the same manner as in Example 1.

For each sample, determine the gamma value from the characteristic curve of the cyan dye image obtained by color development, and calculate the gamma (γR) due to red exposure to the gamma (γR) due to white exposure.
Table 2 shows the values divided by γW).

[0115]

[Table 2]

As is clear from Table 2, Samples 10 to 13 containing the couplers of the present invention have larger γR/γW values than Comparative Samples 8 and 9, indicating an excellent interlayer effect. .

[0117]

Effects of the Invention By using the novel DIR coupler of the present invention, it is possible to provide a silver halide color photographic light-sensitive material with good sharpness and excellent storage stability.

Claims (1)

[Claims] Claim 1: A silver halide color photographic light-sensitive material having at least one silver halide emulsion layer on a support, in which at least one of the photographic constituent layers contains a compound of the following general formula [I
] A silver halide color photographic light-sensitive material characterized by containing at least one compound which releases a development inhibitor by reaction with an oxidized form of a developing agent. [Formula, Cp represents a coupler residue capable of a coupling reaction with the oxidized color developing agent, TIME represents a timing group bonded at the coupling position with Cp, and l represents 0 or 1. represent. Z represents a nonmetallic atom group necessary to form a tetrazole, triazole, or imidazole ring. R represents an aliphatic group, an aromatic group, or a heterocyclic group. ]