Silver halide color photographic material

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 improved in color-forming property, color reproduction, and preservability of the dye image.
BACKGROUND OF THE INVENTION
In silver halide color photographic materials, generally a yellow coupler, a magenta coupler, and a cyan coupler are used in combination as photographic couplers that will react with the oxidized product of an aromatic primary amine developing agent to form color-formed dyes.
For the color-formed dyes obtained from such couplers, the following properties are desired: for example, they are desired to be fine in spectral absorption characteristics and high in fastness, for example, to light, heat, and humidity. The "fine spectral absorption characteristics" desired for photographic materials means that each of the color-formed dyes respectively formed from couplers does not have undesired absorption in the wavelength region other than the desired main absorption. For example, in the case of yellow color formed dyes, since the main absorption section of the formed dyes are broad, there is undesired absorption on the long-wavelength side of the maximum absorption wavelength and color reproduction of yellow and green hues is unsatisfactory.
In color photographic materials used for recording and preserving images, conventionally, benzoylacetanilide yellow couplers or bivaloylacetaminlide yellow couplers have been used. However, the yellow dyes obtained from these couplers have a problem in view of color reproduction because the main absorption is broad, and therefore a technique for improving them has been desired. Further, since the color-formed dyes obtained from the above yellow couplers are poorer in fastness than the color-formed dyes obtained from magenta couplers and cyan couplers, the change in color balance during storage is conspicuous and therefore its improvement in color print materials that are particularly intended to be kept for a long period of time has been strongly desired.
Therefore, in order to improve light-fastness of such yellow color-formed dyes, sterically hindered phenol compounds described, for example, in JP-A ("JP-A" means unexamined published Japanese patent application) Nos. 48535/1979 and 222853/1985; polyalkylpiperidine compounds described, for example, in JP-B ("JP-B" means examined Japanese patent publication) No. 20671/1982 and JP-A Nos. 116747/1984 and 11935/1984; and compounds described, for example, in JP-A Nos. 239149/1987, 240965/1987, 254149/1987, 262047/1987, and 300748/1990, are known. Certainly, light-fastness was improved by the use of a combination of a yellow coupler and these compounds. However, it was found that its improved effect is not on a satisfactory level and that, for example, the emulsion stability is deteriorated.
This deterioration of the emulsion stability causes a photographically serious problem. That is, (1), with time, couplers deposit from the oil droplets in which the couplers are dissolved, resulting in a coating problem or a decrease in the maximum color density, or (2), with time, the diameter of the oil droplets increases, resulting in a reduction called haze, which lowers the apparent maximum color density.
Thus, a technique satisfying all of the performances desired has not yet been attained.
SUMMARY OF THE INVENTION
Therefore, the object of the present invention is to provide a silver halide color photographic material fine in spectral absorption characteristics of the yellow color-formed dye and improved in its light-fastness without deteriorating the performance, such as the colorforming property.
Other and further objects, features, and advantages of the invention will be appear more fully from the following description.
DETAILED DESCRIPTION OF THE INVENTION
The inventors have studied in various ways and have found that the above object can be attained by providing a silver halide color photographic material having on a base at least one photosensitive silver halide emulsion layer and at least one nonsensitive hydrophilic colloid layer, characterized in that at least one of said photosensitive layers contains at least one yellow coupler represented by the following formula (1) or (2), and at least one of said photosensitive layer and said nonsensitive layers contains at least one compound represented by the following formula (3) or (4): ##STR4## wherein X.sup.1 and X.sup.2 each represent an alkyl group, an aryl group, or a heterocyclic group, X.sup.3 represents an organic residue required to form a nitrogen-containing heterocyclic group together with the >N--, Y represents an aryl group or a heterocyclic group, and Z represents a group capable of being released upon a coupling reaction of the coupler represented by formula (1) or (2) with the oxidized product of a developing agent (hereinafter referred to as a coupling split-off group) ##STR5## wherein R.sub.a1, R.sub.a2, R.sub.a3, R.sub.a4, and R.sub.a5, which may be the same or different, each represent a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, a heterocyclic group, --A--R.sub.a6, --N(R.sub.a6)(R.sub.a6 '), --COR.sub.a6 ", --SO.sub.2 R.sub.a6 ", a cyano group, a halogen atom, or a nitro group, (wherein --A-- represents --O -- or --S--, R.sub.a6 represents a hydrogen atom or a monovalent organic group, R.sub.a6 ' and R.sub.a6 " each represent a hydroxyl group or a monovalent organic group), provided that R.sub.a1, R.sub.a2, R.sub.a3, R.sub.a4, and R.sub.a5 are not hydrogen atoms at the same time, and that among the substituents R.sub.a1, R.sub.a2, R.sub.a3, R.sub.a4, and R.sub.a5, those substituents which are in ortho positions to one another may bond together to form a 5- to 7-membered ring, which may be a spiro ring or a bicyclo ring, ##STR6## wherein R.sub.3 represents a hydrogen atom, --OR.sub.4 (wherein R.sub.4 represents a hydrogen atom or an alkyl group), an oxy radical, --SOR.sub.4 ', --SO.sub.2 R.sub.4 ' (wherein R.sub.4 ' represents an alkyl group or an aryl group), an alkyl group, an alkenyl group, an alkynyl group, or --COR4" (wherein R4" represents a hydrogen atom or a monovalent organic group), R.sub.5 ' and R.sub.5 ", which may be the same or different, each represent an alkyl group, B represents a group of non-metallic atoms required to form together with the nitrogen atom a 5- to 7-membered ring, and R.sub.5 ' and R.sub.5 " may bond together to form a 5- to 7-membered ring.
In formula (4), R.sub.5 ' and R.sub.5 " each are two number and the two groups R.sub.5 ' may be the same or different and the two groups R.sub.5 " may be the same or different.
The specific constitution of the present invention will now be described in detail.
In formula (1) or (2), when X.sup.1 and X.sup.2 represent an alkyl group, the alkyl group is a straight-chain, branched chain, or cyclic, saturated or unsaturated, substituted or unsubstituted alkyl, group having a carbon number (hereinafter abbreviated to a C-number) of 1 to 30, preferably 1 to 20. Examples of the alkyl group are methyl, ethyl, propyl, butyl, cyclopropyl, allyl, t-octyl, i-butyl, dodecyl, and 2-hexyldecyl.
When X.sup.1 and X.sup.2 represent a heterocyclic group, the heterocyclic group is a 3- to 12-membered, preferably a 5- to 6-membered, saturated or unsaturated, substituted or unsubstituted, monocyclic or condensed ring heterocyclic group having a C-number of 1 to 20, preferably 1 to 10, and at least one heteroatom, such as a nitrogen atom, an oxygen atom, or a sulfur atom. As an example of the heterocyclic group, 3-pyrrolidinyl, 1,2,4-triazole-3-yl, 2-pyridyl, 4-prymidinyl, 3-pyrazolyl, 2-pyrrolyl, 2,4-dioxo-1,3-imidazolidine-5-yl, or pyranyl can be mentioned.
When X.sup.1 and X.sup.2 represent an aryl group, the aryl group is a substituted or unsubstituted aryl group having a C-number of 6 to 20, preferably 6 to 10. As a typical example of the aryl group, a phenyl group and a naphthyl group can be mentioned.
When X.sup.3 represents a nitrogen-containing heterocyclic group together with the >N--, the heterocyclic group is a 3- to 12-membered, preferably 5- to 6-membered, substituted or unsubstituted, saturated or unsaturated, monocyclic or condensed ring heterocyclic group that have a C-number of 1 to 20, preferably 1 to 15 and may contain in addition to the nitrogen atom, for example, an oxygen atom or a sulfur atom as heteroatom. As an example of the heterocyclic group, pyrrolidino, piperidino, morpholino, 1-piperazinyl, 1-indolinyl, 1,2,3,4-tetrahydroquinoline-1-yl, 1-imidazolidinyl, 1-pyrazolyl, 1-pyrrolinyl, 1-pyrazolidinyl, 2,3-dihydro-1-indazolyl, 2-isoindolinyl, 1-indolyl, 1-pyrrolyl, 4-thiazine-S,S-dioxo-4-yl or benzoxadine-4-yl can be mentioned.
When X.sup.1 and X.sup.2 represent a substituted alkyl, aryl or heterocyclic group and X.sup.3 represents a substituted nitrogen-containing heterocyclic group together with the >N--, examples of the substituent include: a halogen atom (e.g., fluorine and chlorine), an alkoxycarbonyl group (preferably having a C-number of 2 to 30, and more preferably 2 to 20, e.g., methoxycarbonyl, dodecyloxycarbonyl, and hexadecyloxycarbonyl), an acylamino group (preferably having a C-number of 2 to 30, and more preferably 2 to 20, e.g., acetamido, tetradecaneamido, 2-(2,4-di-t-amylphenoxy)butaneamido, and benzamido), a sulfonamido group (preferably having a C-number of 1 to 30, and more preferably 1 to 20, e.g., methanesulfonamido, dodecanesulfonamido, hexadecylsulfonamido, and benzenesulfonamido), a carbamoyl group (preferably having a C-number of 1 to 30, and more preferably 1 to 20, e.g., N-butylcarbamoyl and N,N-diethylcarbamoyl), an N-sulfonylcarbamoyl group (preferably having a C-number of 1 to 30, and more preferably 1 to 20, e.g., N-mesylcarbamoyl and N-dodecylsulfonylcarbamoyl), a sulfamoyl group (preferably having a C-number of 1 to 30, and more preferably 1 to 20, e.g., N-butylsulfamoyl, N-dodecylsulfamoyl, N-hexadecylsulfamoyl, N-3-(2,4-di-t-amylphenoxy)butylsulfamoyl, and N,N-diethylsulfamoyl), an alkoxy group (preferably having a C-number of 1 to 30, and more preferably 1 to 20, e.g., methoxy, hexadecyloxy, and isopropoxy), an aryloxy group (preferably having a C-number of 6 to 20, and more preferably 6 to 10, e.g., phenoxy, 4-methoxyphenoxy, 3-t-butyl-hydroxyphenoxy, and naphthoxy), an aryloxy-carbonyl group (preferably having a C-number of 7 to 21, and more preferably 7 to 11, e.g., phenoxycarbonyl), an N-acylsulfamoyl group (preferably having a C-number of 2 to 30, and more preferably 2 to 20, e.g., N-propanoylsulfamoyl and N-tetradecanoylsulfamoyl), a sulfonyl group (preferably having a C-number of 1 to 30, and more preferably 1 to 20, e.g., methanesulfonyl, octanesulfonyl, 4-hydroxyphenylsulfonyl, and dodecanesulfonyl), an alkoxycarbonylamino group (preferably having a C-number of 1 to 30, and more preferably 1 to 20, e.g., ethoxycarbonylamino), a cyano group, a nitro group, a carboxyl group, a hydroxyl group, a sulfo group, an alkylthio group (preferably having a C-number of 1 to 30, and more preferably 1 to 20, e.g., methylthio, dodecylthio, and dodecylcarbamoylmethylthio), a ureido group (having a C-number of 1 to 30, more preferably to 20, e.g., N-phenylureido and N-hexadecylureido), an aryl group (preferably having a C-number of 6 to 20, and more preferably 6 to 10, e.g., phenyl, naphthyl, and 4-methoxyphenyl), a heterocyclic group (which is a 3- to 12-membered, preferably 5- to 6-membered, monocyclic or condensed ring having preferably a C-number of 1 to 20, and more preferably 1 to 10 and containing at least one heteroatom, such as a nitrogen atom, an oxygen atom, and a sulfur atom, e.g., 2-pyridyl, 3-pyrazolyl, 1-pyrrolyl, 2,4-dioxo-1,3-imidazolidine-1-Yl, 2-benzoxazolyl, morpholino, and indolyl), an alkyl group (which may be straight-chain, branched chain, or cyclic and saturated or unsaturated and preferably has a C-number of 1 to 30, and more preferably 1 to 20, e.g., methyl, ethyl, isopropyl, cyclopropyl, t-pentyl, t-octyl, cyclopentyl, t-butyl, s-butyl, dodecyl, and 2-hexyldecyl), an acyl group (preferably having a C-number of 1 to 30, and more preferably 2 to 20, e.g., acetyl and benzoyl), an acyloxy group (preferably having a C-number of 2 to 30, and more preferably 2 to 20, e.g., propanoyloxy and tetradecanoyloxy), an arylthio group (preferably having a C-number of 6 to 20, and more preferably 6 to 10, e.g., phenylthio and naphthylthio), a sulfamoylamino group (preferably having a C-number of 0 to 30, and more preferably 0 to 20, e.g., N-butyl-sulfamoylamino, N-dodecylsulfamoylamino, and N-phenyl-sulfamoylamino), or an N-sulfonylsulfamoyl group (preferably having a C-number of 1 to 30, and more preferably 1 to 20, e.g., N-mesylsulfamoyl, N-ethanesulfonylsulfamoyl, N-dodecanesulfonylsulfamoyl, and N-hexadecanesulfonylsulfamoyl). These substituents may be further substituted. Examples of the substituent include those mentioned above.
Among the above substituents, preferable one includes, for example, an alkoxy group, a halogen atom, an alkoxycarbonyl group, an acyloxy group, an acylamino group, a sulfonyl group, a carbamoyl group, a sulfamoyl group, a sulfonamido group, a nitro group, an alkyl group, or an aryl group.
When Y in formulas (1) and (2) represents an aryl group, the aryl group is a substituted or unsubstituted aryl group preferably having a C-number of 6 to 20, and more preferably 6 to 10. Typical examples thereof are a phenyl group and a naphthyl group.
When Y in formulas (1) and (2) represents a heterocyclic group, the heterocyclic group has the same meaning as that of the heterocyclic group represented by X.sup.1 and X.sup.2.
When Y represents a substituted aryl group or a substituted heterocyclic group, examples of the substituent include those mentioned as examples of the substituent possessed by X.sup.1. Preferable examples of the substituted ary group and heterocyclic group represented by Y are those wherein the substituted group has a halogen atom, an alkoxycarbonyl group, a sulfamoyl group, a carbamoyl group, a sulfonyl group, an N-sulfonylsulfamoyl group, an N-acylsulfamoyl group, an alkoxy group, an acylamino group, an N-sulfonylcarbamoyl group, a sulfonamido group, or an alkyl group.
A particularly preferable example of Y is a phenyl group having at least one substituent in the ortho position.
The group represented by Z in formulas (1) and (2) may be any one of conventionally known groups capable of being released upon a coupling reaction (which is referred to coupling split-off groups). Preferably Z includes, for example, a nitrogen-containing heterocyclic group bonded to the coupling site through the nitrogen atom, an aryloxy group, an arylthio group, a heterocyclic oxy group, a heterocyclic thio group, an acyloxy group, a carbamoyloxy group, an alkylthio group, or a halogen atom.
These coupling spit-off groups may be any one of nonphotographically useful groups, photographically useful groups, or precursors therefor (e.g., a development retarder, a development accelerator, a desilvering accelerator, a fogging agent, a dye, a hardener, a coupler, a developing agent oxidized product scavenger, a fluorescent dye, a developing agent, or an electron transfer agent).
When Z is a photographically useful group, one which is conventionally known is useful. For example, photographically useful groups described, for example, in U.S. Pat. Nos. 4,248,962, 4,409,323, 4,438,193, 4,421,845, 4,618,571, 4,652,516, 4,861,701, 4,782,012, 4,857,440, 4,847,185, 4,477,563, 4,438,193, 4,628,024, 4,618,571, or 4,741,994, and Europe Publication Patent No. 193389A, 348139A, or 272573A or coupling split-off groups for releasing them (e.g., a timing group) are used.
When Z represents a nitrogen-containing heterocyclic group bonded to the coupling site through the nitrogen atom, preferably Z represents a 5- to 6-membered, substituted or unsubstituted, saturated or unsaturated, monocyclic or condensed ring heterocyclic group preferably having a C-number of 1 to 15, and more preferably 1 to 10. As heteroatom, in addition to the nitrogen atom, an oxygen atom or a sulfur atom may be present. As a preferable example of the heterocyclic group, 1-pyrazolyl, 1-imidazolyl, pyrrolino, 1,2,4-triazole-2-yl, 1,2,3-triazole-1-yl, benzotriazolyl, benzimidazolyl, imidazolidine-2,4-dione-3-yl, oxazolidine-2,4-dione-3-yl, 1,2,4-triazolidine-3,5-dione-4-yl, imidazolidine-2,4,5-trion-3-yl, 2-imidazolinone-1-yl-, 3,5-dioxomorpholino, or 1-indazolyl can be mentioned. When these heterocyclic groups are substituted, the substituent includes those mentioned as examples of the substituent which may be possessed by the X.sup.1 group. Preferable substituents are those wherein one substituent is an alkyl group, an alkoxy group, a halogen atom, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylthio group, an acylamino group, a sulfonamido group, an aryl group, a nitro group, a carbamoyl group, or a sulfonyl group.
When Z represents an aromatic oxy group, preferably the aromatic oxy group is a substituted or unsubstituted aromatic oxy group having a C-number of 6 to 10, and more preferably a substituted or unsubstituted phenoxy group. If the aromatic oxy group is substituted, examples of the substituent include those mentioned as examples of the substituent which may be possessed by X.sup.1 mentioned above. Among them, preferable substituents are those wherein at least one substituent is an electron-attractive substituent, such as a sulfonyl group, an alkoxycarbonyl group, a sulfamoyl group, a halogen atom, a carboxyl group, a carbamoyl group, a nitro group, a cyano group, or an acyl group.
When Z represents an aromatic thio group, preferably the aromatic thio group is a substituted or unsubstituted aromatic thio group having a C-number of 6 to 10, and more preferably a substituted or unsubstituted phenylthio group. When the aromatic thio group is substituted, examples of the substituent include those mentioned as examples of the substituent which may be possessed by X.sup.1 mentioned above. Among them, preferable substituents are those wherein at least one substituent is an alkyl group, an alkoxy group, a sulfonyl group, an alkoxycarbonyl group, a sulfamoyl group, a halogen atom, a carbamoyl group, or a nitro group.
When Z represents a heterocyclic oxy group, preferably the heterocyclic moiety has 1 to 20 carbon atoms, and more preferably 1 to 10 carbon atoms and at least one heteroatom, for example, one nitrogen atom, one oxygen atom, or one sulfur atom and is 3- to 12-membered, more preferably 5- to 6-membered, substituted or unsubstituted, saturated or unsaturated, monocyclic or condensed ring, heterocyclic group. As an example of the heterocyclic oxy group, a pyridyloxy group, a pyrazolyloxy group, or a furyloxy group can be mentioned. When the heterocyclic oxy group is substituted, examples of the substituent include those mentioned as examples of the substituent which may be possessed by X.sup.1 mentioned above. Among them, preferable substituents are those wherein at least one substituent is an alkyl group, an aryl group, a carboxyl group, an alkoxy group, a halogen atom, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylthio group, an acylamino group, a sulfonamido group, a nitro group, a carbamoyl group, or a sulfonyl group.
When Z represents a heterocyclic thio group, preferably the heterocyclic moiety has 1 to 20 carbon atoms, and more preferably 1 to 10 carbon atoms and at least one heteroatom, for example, one nitrogen atom, one oxygen atom, or one sulfur atom and is 3- to 12-membered, more preferably 5- to 6-membered, substituted or unsubstituted, saturated or unsaturated, monocyclic or condensed ring, heterocyclic group. As an example of the heterocyclic thio group, a tetrazolylthio group, a 1,3,4-thiadiazolylthio group, a 1,3,4-oxadiazolylthio group, a 1,3,4-triazolylthio group, a benzoimidazolylthio group, a benzothiazolylthio group, or a 2-pyridylthio group can be mentioned. When the heterocyclic thio group is substituted, examples of the substituent include those mentioned as examples of the substituent which may be possessed by X.sup.1 mentioned above. Among them, preferable substituents are those wherein at least one substituent is an alkyl group, an aryl group, a carboxyl group, an alkoxy group, a halogen atom, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylthio group, an acylamino group, a sulfonamido group, a nitro group, a carbamoyl group, a heterocyclic group, or a sulfonyl group.
When Z represents an acyloxy group, the acyloxy group is a monocyclic or condensed ring, substituted or unsubstituted, aromatic acyloxy group preferably having 6 to 10 carbon atoms or a substituted or unsubstituted aliphatic acyloxy group preferably having 2 to 30 carbon atoms, and more preferably 2 to 20 carbon atoms. When the acyloxy group is substituted, examples of the substituent include those mentioned as examples of the substituent which may .be possessed by X.sup.1 mentioned above.
When Z represents a carbamoyloxy group, the carbamoyloxy group is an aliphatic or aromatic or heterocyclic, substituted or unsubstituted carbamoyloxy group preferably having a C-number of 1 to 30, and more preferably 1 to 20. As an example, N,N-diethylcarbamoyloxy, N-phenylcarbamoyloxy, 1-imidazolylcarbonyloxy, or 1-pyrrolocarbonyloxy can be mentioned. When the carbamoyloxy group is substituted, examples of the substituent include those mentioned as examples of the substituent which may be possessed by X.sup.1 mentioned above.
When Z represents an alkylthio group, the alkylthio group is a substituted or unsubstituted, straight-chain, branched chain, or cyclic, saturated or unsaturated alkylthio group having a C-number of 1 to 30, more preferably 1 to 20. When the alkylthio group is substituted, examples of the substituent include those mentioned as examples of the substituent which may be possessed by X.sup.1 mentioned above.
Now, couplers represented by formulas (1) and (2) that fall in a particularly preferable range will be described.
The group represented by X.sup.1 in formula (1) is preferably an alkyl group, and particularly preferably an alkyl group having a C-number of 1 to 10.
The group represented by Y in formulas (1) and (2) is preferably an aromatic group, and particularly preferably a phenyl group having at least one substituent in the ortho position. The substituent includes those mentioned above, which may be possessed by the aromatic group represented by Y. Preferable substituents include preferable ones mentioned above, which may be possessed by the aromatic group represented Y.
The group represented by Z in formulas (1) and (2) includes preferably a 5- to 6-membered nitrogen-containing heterocyclic group bonded to the coupling site through the nitrogen atom, an aromatic oxy group, a 5- to 6-membered heterocyclic oxy group, or a 5- to 6-membered heterocyclic thio group.
Preferable couplers in formulas (1) and (2) are represented by the following formula (I), (II), or (III): ##STR7## wherein Z has the same meaning defined in formula (1), X.sup.4 represents an alkyl group, X.sup.5 represents an alkyl group or an aromatic group, Ar represents a phenyl group having at least one substituent in the ortho position, X.sup.6 represents an organic residue required to form a nitrogen-containing cyclic group (monocyclic or condensed ring) together with the --C(R.sup.1 R.sup.2)--N<, X.sup.7 represents an organic residue required to form a nitrogen-containing heterocyclic group (monocyclic or condensed ring) together with the --C(R.sup.3).dbd.C(R.sup.4)--N<, and R.sup.1, R.sup.2 R.sup.3, and R.sup.4 each represent a hydrogen atom or a substituent.
Preferable examples of substituent in the ortho position of phenyl group represented by Ar in formula (III) include, for example, a halogen atom, an alkyl group (including a substituted alkyl, such as trifluoromethyl), an alkoxy group, and a phenoxy group. Further, on another position, particularly preferably on the metha position, of the phenyl group, one or more substituents may be introduced, and as a preferable substituent can be mentioned a halogen atom, an alkoxy group, an alkoxycarbonyl group, a carbonamido group, a sulfonamido group, a carbamoyl group, a sulfonyl group, and a sulfamoyl group (including an acylsulfamoyl or the like). These substituents may be further substituted.
With respect to a detailed description and a preferable range of the groups represented by X.sup.4 to X.sup.7, Ar, and Z in formulas (I) to (III), the description in the relevant range described for formulas (1) and (2) is applied. When R.sup.1 to R.sup.4 represent a substituent, examples include those substituents that may be possessed by X.sup.1 mentioned above. Among the couplers represented by the above mentioned formulas, particularly preferable couplers are those represented by formula (II) or (III).
The couplers represented by formula (1), (2), (I), (II), and (III) may form a dimer or higher polymer (e.g., a telomer or a polymer) by bonding at the groups represented by X.sup.1 to X.sup.7 Y, Ar R.sup.1 to R.sup.4 and Z through a divalent group or more higher polyvalent group. In that case, the number of carbon atoms may fall outside the range of the number of carbon atoms defined in the above-mentioned substituents.
Preferable examples of the couplers represented by formula (1), (2), (I), (II), and (III) are nondiffusible couplers. The term "nondiffusible couplers" refers to couplers having in the molecule a group with a molecular weight large enough to make the molecule immobilized in the layer in which the molecule is added. Generally an alkyl group having a C-number of 8 to 30, preferably 10 to 20, or an aryl group having a C-number of 4 to 40, is used. These nondiffusible groups may be substituted on any position in the molecule, and two or more of them may be present in the molecule.
Specific examples of the couplers represented by formulas (1), (2), (I), (II), and (III) are shown below, but the present invention is not restricted to them. ##STR8##
Couplers represented by the above formulae (1) and (2) can be used in combination with two or more couplers, and may be used in combination with other yellow couplers than those of this invention.
The yellow coupler of the present invention is usually contained in the range of amount of 0.1 to 1.0 mol, more preferably 0.1 to 0.5 mol, per mol of silver halide in a silver halide emulsion layer consisting of a photosensitive layer.
The compound represented by the above formula (3) now be described.
The alkyl group and the alkenyl group represented by R.sub.a1 to R.sub.a5 may be straight-chain, branched chain, or cyclic and may be substituted and examples of the substituent include a halogen atom, a hydroxyl group, a nitro group, a cyano group, an aryl group, an amino group, an alkoxycarbonyl group, an aryloxycarbonyl group, a carbamoyl group, a sulfamoyl group, a heterocyclic group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, an acylamino group, a sulfonamido group, an acyl group, an acyloxy group, an alkylsulfonyl group, an arylsulfonyl group, a heterocyclic oxy group, an alkylamino group, an arylamino group, a ureido group, and a urethane group. The alkyl group includes, for example, a methyl group, an ethyl group, a n-butyl group, a t-butyl group, a cyclohexyl group, an octyl group, an octadecyl group, a methoxyethyl group, and a benzyl group. The alkenyl group includes, for example, an ally group, a vinyl group, a cyclohexenyl group, and a 1-octadecenyl group.
The aryl group and the heterocyclic group represented by R.sub.a1 to R.sub.a5 may be substituted and the substituent may be any one capable of substitution. Examples of the substituent include an alkyl group, a hydroxyl group, an acylamino group, an alkylamino group, an arylamino group, an amino group, a carbamoyl group, a sulfamoyl group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, a halogen atom, a cyano group, a nitro group, an alkoxycarbonyl group, an aryloxycarbonyl group, an acyl group, an acyloxy group, an alkylsulfonyl group, an arylsulfonyl group, a heterocyclic oxy group, a ureido group, a urethane group, and a sulfonamido group. The aryl group includes, for example, a phenyl group, a 2-hydroxylphenyl group, a 4-hydroxylphenyl group, a 2-benzyloxyphenyl group, a 2-hydroxy-3,5-dimethylphenyl group, and a naphthyl group. The heterocyclic group includes, for example, a 2-pyridyl group, a 4-morpholyl group, and a 1-indolinyl group.
The monovalent organic group represented by R.sub.a6, R.sub.a6 ', and R.sub.6 " may be any one capable of substitution such as an alkyl group, an aryl group, an alkoxy group, an aryloxy group, a substituted amino group, an acyl group, a sulfonyl group, a hydroxyl group, and a heterocyclic group. More particularly, as --A--R.sub.a6, for example, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, and a heterocyclic oxy group can be mentioned and as --N(R.sub.a6)(R.sub.a6 '), for example, an alkylamino group, an acylamino group, and a sulfonamido group can be mentioned. As --COR.sub.a ", for example, a carbamoyl group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, and a carboxyl group can be mentioned and as --SO.sub.2 R.sub.a6 ", for example, an alkylsulfonyl group, an arylsulfonyl group, and a sulfamoyl group can be mentioned.
Out of the substituents R.sub.a1 to R.sub.a5, those substituents that are in ortho-positions to one another may bond together to form a 5- to 7-membered ring, such as a chroman ring, a coumaran ring, and an indane ring, which may form a spiro ring or a bicyclo ring.
In the present invention, out of the compounds represented by formula (3), preferable compounds are the following:
1) compounds wherein at least one of R.sub.a1 and R.sub.a5 is an alkyl group and more preferably the s-position of the alkyl group is branched;
2) compounds wherein at least one of R.sub.a1 to R.sub.a5 is a substituted or unsubstituted benzyl group, aryl group, arylsulfonyl group, arylthio group, or aryloxy group;
3) compounds wherein out of the substituents R.sub.a1 to R.sub.a5 these substituents that are in ortho-positions to one another are bonded to form a chroman ring or an indane ring, which compounds may be spiro compounds; and
4) compounds wherein R.sub.a1 is an acylamino group. In the present invention, out of the compounds represented by formula (3), more preferable compounds are those represented by the following formulae (3A) and (3B): ##STR9##
In formula (3A), R.sub.a7 and R.sub.a8 each represent an alkyl group, R.sub.a9, R.sub.a10, and R.sub.a11 each represent an alkyl group, an alkoxy group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylamino group, an arylamino group, an acylamino group, or a carbamoyl group, and R.sub.a9 and R.sub.a11 each may represent a hydrogen atom. The alkyl group represented by R.sub.a7 and R.sub.a8 is preferably an alkyl group preferably an alkyl group having a C-number of 1 to 12, and more preferably an alkyl group having a C-number of 3 to 8 and branched at the Q-position. Particularly preferably R.sub.a7 and R.sub.a8 each represent a t-butyl group or a t-pentyl group. Preferably R.sub.a9 and R.sub.a11 each represent a hydrogen atom.
In formula (3B), R.sub.9, R.sub.10, R.sub.11, and R.sub.12 each represent a hydrogen atom or an alkyl group having a C-number of 1 to 18, the total of the carbon atoms of R.sub.9, R.sub.10, R.sub.11, R.sub.12 is 32 or less, Y.sub.1 and Y.sub.2 each represent a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, an acyl group, a sulfonyl group, or a silyl group, X represents a single bond, an oxygen atom, a sulfur atom, a sulfonyl group, or RA, R.sub.13 and R.sub.14 each represents a hydrogen atom or an alkyl group having a C-number of 1 to 10, p is an integer of 1 to 3, n is 1 or 2, when p is 2 or 3, the groups R.sub.13 or the groups R.sub.14 may be the same or different, and when n is 2, the groups R.sub.10, the groups R.sub.12, or the groups Y.sub.2 may be the same or different, provided that at least one of Y.sub.1 and Y.sub.2 represents a hydrogen atom.
In the present invention, out of the compounds represented by formulae (3A) and (3B), more preferable compounds are those represented by the following formulae (3C) and (3D): ##STR10##
In formula (3C), R.sub.a7 and R.sub.a8 have the same meanings as those defined in formula (3A).
Rk represents a k-valent organic group, and k is an integer of 1 to 6.
The k-valent organic group represented by Rk includes, for example, an alkyl group, an alkenyl group, a polyvalent unsaturated hydrocarbon group (e.g., ethylene, triethylene, propylene, hexamethylene, and 2-chlorotrimethylene), an unsaturated hydrocarbon group (e.g., glycerin, diglycerin, petaerythrityl, and dipentaerythrityl), an cycloaliphatic hydrocarbon group (e.g., cyclopropyl, cyclohexyl, and cyclohexenyl), an aryl group (e.g., phenyl), an arylene group (e.g., 1,2-, 1,3-,or 1,4-phenylene, 3,5-dimethyl-1,4-phenylene, 2-t-butyl-1,4-phenylene, 2-chloro-1,4-phenylene, and naphthalene), and a 1,3,5-trisubstituted benzene group.
In addition to the above groups, Rk further includes a k-valent organic group formed by bonding any groups of the above groups through a --O--, --S--, or --SO.sub.2 -group.
More preferably, Rk represents a 2,4-di-t-butylphenyl group, a 2,4-di-t-pentylphenyl group, a p-octylphenyl group, a p-dodecylphenyl group, a 3,5-di-t-butyl-4-hydroxyphenyl group, and a 3,5-di-t-pentyl-4-hydroxyphenyl group.
Preferably k is an integer of 1 to 4.
In formula (3D), R.sub.9, R.sub.10, R.sub.11, R.sub.12, and X have the same meanings as those defined in formula (3B).
In the present invention, compound represented by formula (3) is preferably selected from the group consisting of compounds represented by the following formula (3E) or (3F): ##STR11## wherein R.sup.5 and R.sup.6 each represented an alkyl group, R.sup.7 represents an alkyl group, --NHR.sup.8 (wherein R.sup.8 represents a monovalent organic group), or --COOR.sup.9 (wherein R.sup.9 represents a halogen atom or a monovalent organic group), and m represents an integer of 0 to 3. ##STR12## wherein R.sub.9, R.sub.10, R.sub.11, and R.sub.12 have the same meanings as those defined in formula (3B).
Further, compound represented by formula (3) is preferably selected from the group consisting of compounds represented by the above-mentioned formulae (3E) and the following formula (3G). ##STR13## wherein R.sub.9, R.sub.10, R.sub.11, and R.sub.12 each represent a hydrogen atom or an alkyl group having 1 to 18 carbon atoms, the total of the carbon atoms of R.sub.9, R.sub.10, R.sub.11, and R.sub.12 is 32 or less, Y.sub.3 and Y.sub.4 each represent a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, an acyl group, a sulfonyl group, or a silyl group, X represents a single bond, a oxygen atom, a sulfur atom, a sulfonyl group, or RA, in which R.sub.13 and R.sub.14 each represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, p is an integer of 1 to 3, n is 1 or 2, and when p is 2 or 3, the groups R.sub.13 or the groups R.sub.14 may be the same or different.
Specific compounds represented by formula (II) are shown below, but the present invention is not limited to them. ##STR14##
The compound represented by formula (4) will now be described below.
The alkyl group, the alkenyl group, and the alkynyl group represented by R.sub.3 may be straight-chain, branched chain, or cyclic and may be substituted. The substituent may be those capable of substitution. The alkyl group includes, for example, a methyl group, an ethyl group, a butyl group, an octyl group, a hexadecyl group, and a benzyl group and preferably has a C-number of 1 to 12. The alkenyl group includes, for example, a vinyl group and an allyl group and preferably has a C-number of 2 to 16. The alkynyl group includes, for example, an ethynyl group and a 2-propyl group and preferably has a C-number of 2 to 16.
The alkyl group represented by R.sub.4 and R.sub.4 ' may be straight-chain, branched chain, or cyclic and may be substituted. The substituent may be those capable of substitution. The aryl group represented by R.sub.4 ' may be substituted and the substituent may be those capable of substitution. The monovalent organic group represented by R.sub.4 " includes, for example, an alkyl group, an alkenyl group, an alkoxy group, an aryloxy group, an alkylamino group, and an arylamino group. Each of R.sub.4, R.sub.4 ', and R.sub.4 " has a C-number of 16 or less. More particularly, --OR.sub.4 represents, for example, a hydroxyl group, an alkoxy group, or a cycloalkyloxy group. --SOR.sub.4 ' represents, for example, an alkylsulfinyl group, or an arylsulfinyl group, --SO.sub.2 R.sub.4 ' represents, for example, an alkylsulfonyl group or an arylsulfonyl group, and --COR.sub.4 " represents, for example, an acyl group or an alkoxycarbonyl group.
R.sub.3 preferably represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an alkoxy group, or an acyl group.
The alkyl group represented by R.sub.5 ' and R.sub.5", is a linear or branched alkyl group or a cycloalkyl group formed by R.sub.5 ' and R.sub.5 " jointly and preferably a linear or branched alkyl group having 1 to 5 carbon atoms, particularly preferably a methyl group.
B represents a group of non-metallic atoms required to form a 5- to 7-membered ring and the heterocyclic ring formed by B is, for example, a piperazine ring, a morpholine ring, a piperidine ring, and a pyrrolidine ring, preferably a saturated ring, more preferably a 6-membered ring, and further more preferably a piperazine ring, a morpholine ring, or a piperidine ring. Most preferably B represents a group of atoms required to form a piperidine ring.
In the present invention, preferably the compound represented by formula (4) is one represented by the following formula (4A): ##STR15## wherein Rb represents an alkyl group, an alkenyl group, an alkynyl group, or an acyl group, more preferably a methyl group, an ethyl group, a vinyl group, an ally group, a propenyl group, a benzyl group, an acetyl group, a propionyl group, an acryloyl group, a methacryloyl group, or a crotonoyl group.
Further, in the present invention, preferably the compound represented by formula (4) is represented by the following formula (4B): ##STR16## wherein R.sub.5 represents a hydrogen atom, a hydroxyl group, an oxy radical group, --SOR'.sub.5, --SO.sub.2 R'.sub.5 (wherein R'.sub.5 represents an alkyl group or an aryl group), an alkyl group, an alkenyl group, an alkynyl group, an alkoxy group, or --COR".sub.5 (wherein R".sub.5 represents a hydrogen atom or a monovalent organic group), R.sub.6, R'.sub.6, and R".sub.6 each represent an alkyl group, R.sub.7 and R.sub.8 each represent a hydrogen atom or --OCOR"' (wherein R"' represents a monovalent organic group), R.sub.7 and R.sub.8 together may form a heterocyclic ring, and n is an integer of 0 to 4.
Specific compounds represented by formula (4) are shown below, but the present invention is not restricted to them. ##STR17##
Compounds represented by formulae (3) and (4) can be used in combination of two or more couplers.
The amounts of the yellow coupler of this invention and the compound represented by formula (3) or (4) are used such that the compound is contained in an amount generally in the range of 0.01 to 2.0 mol, preferably in the range of 0.1 to 1.0 mol, per mol of the coupler. Although the compound represented by formula (3) or (4) can be added to an arbitrary layer, preferably the compound is added to the layer containing the yellow coupler of the present invention or a layer adjacent to it, more preferably to the layer containing the yellow coupler of the present invention.
Preferably the compounds represented by formulae (3) and (4) are added in the same way as that of the addition of the coupler; that is, the compounds represented by formulae (3) and (4) are dissolved in a high-boiling organic solvent for couplers, and if necessary a low-boiling organic solvent (co-solvent), and are s emulsified and dispersed into an aqueous gelatin solution. If the compounds represented by formulae (3) and (4) are added to the layer containing the yellow coupler, preferably the compounds are co-emulsified with the yellow coupler. If the compounds are emulsified and dispersed together with a water-insoluble polymer as described below, the use of a high-boiling organic solvent is not required.
Although, as a silver halide used in the present invention, for example, silver chloride, silver bromide, silver bromo(iodo)chloride, and silver bromoiodide can be used, particularly if rapid processing is intended, a silver chloride emulsion or a silver bromochloride emulsion substantially free from silver iodide and having a silver chloride content of 90 mol % or more, preferably 95 mol % or more, particularly preferably 98 mol % or more, is used preferably.
In the photographic material according to the present invention, in order to improve, for example, sharpness of the image, preferably a dye that can be decolored by processing (in particular an oxonol dye), as described in European Patent EP 0,337,490A2, pages 27 to 76, is added to a hydrophilic layer, so that the optical reflection density of the photographic material at 680 nm may be 0.70 or over, or 12 wt. % or more (preferably 14 wt. % or more) of titanium oxide the surface of which has been treated with secondary to quaternary alcohol (e.g., trimethylolethane) or the like is contained in a water-resistant resin layer of the support.
As a high-boiling organic solvent for photographic additives, such as cyan, magenta, and yellow couplers that can be used in the present invention, any compound can be used if the compound has a melting point of 100.degree. C. or below and a boiling point of 140.degree. C. or over; if it is immiscible with water; and if it is a good solvent for the coupler. The melting point of the high-boiling organic solvent is preferably 80.degree. C. or below and the boiling point of the high-boiling organic solvent is preferably 160.degree. C. or over, more preferably 170.degree. C. or over.
Details of these high-boiling organic solvents are described in JP-A No. 215272/1987, from page 137 (right lower column) to page 144 (right upper column).
To emulsify and disperse the cyan, magenta, or yellow coupler into a hydrophilic colloid, a method can be used wherein the coupler is impregnated into a loadable latex polymer (e.g., see U.S. Pat. No. 4,203,716) in the presence or absence of the above high-boiling organic solvent, but preferably a method is used wherein the coupler is dissolved together with a polymer insoluble in water but soluble in organic solvents in the presence or absence of the above-mentioned high-boiling organic solvent and the solution is emulsified and dispersed into an aqueous hydrophilic colloid solution.
In the present invention, a photographically useful substance that has been retained in the state of a solution by any one of the below-mentioned methods is mixed, in the presence of a surface-active polymer, with water or an aqueous hydrophilic colloid solution, so that a dispersion of the photographically useful finely divided substance is prepared. If necessary, to make the size of the particles of the dispersion more fine, one of dispersing machines as described below may be used.
As an emulsifier used for carrying out the present invention, for example, a high-speed stirring-type dispersing machine having a great shearing force and a dispersing machine that can give high-strength ultrasonic energy can be mentioned. Specifically, a colloid mill, a homogenizer, a capillary tube-type emulsifier, a liquid silen, an electromagnetic stress-type ultrasonic generator, and an emulsifier with a Porman-whistile can be mentioned. A high-speed stirring-type disperser which is preferably used in the present invention is of a type wherein the essential part for the dispersion is turned at a high speed (e.g., 500 to 15,000 rpm, preferably 2,000 to 4,000 rpm) and examples thereof are Dissolver, Polytron, Homomixer, Homoblender, KD-Mill, and Jet-agitor. The high-speed stirring type disperser to be used in the present invention is called a dissolver or high-speed impeller disperser, and a preferable example is one provided with an impeller having serrated blades turned up and down alternatively and attached to a shaft that is rotated at a high speed, as described in JP-A No. 129136/1980.
To make dispersion particles fine, for example, a method described in European Patent No. 361322, wherein a solution of a compound to be dispersed and a water-miscible organic solvent is mixed with an aqueous hydrophilic colloid solution to deposit dispersion particles; methods described in European Patent No. 374837 and International Publication WO 90/16011, wherein an aqueous alkali solution of a compound to be dispersed is neutralized with an acid to deposit dispersion particles; and a method described in International Publication WO 91/08516, wherein an oil-in-water dispersion of a compound to be dispersed is absorbed to a polymer dispersion, can be preferably used.
Preferably, homopolymers and copolymers described in U.S. Pat. No. 4,857,449 and International Publication WO 88/00723, pages 12 to 30, are used, and more preferably methacrylate polymers or acrylamide polymers, particularly preferably acrylamide polymers, are used because, for example, the color image is stabilized.
In the photographic material according to the present invention, preferably together with the coupler a color image preservability-improving compound, as described in European Patent EP 0,277,589 A2, is used. Particularly a combination with a pyrazoloazole coupler is preferable.
That is, when a compound (F), which will chemically combine with the aromatic amine developing agent remaining after the color development processing to form a chemically inactive and substantially colorless compound, and/or a compound (G), which will chemically combine with the oxidized product of the aromatic amine color developing agent remaining after the color development processing to form a chemically inactive and substantially colorless compound, are used simultaneously or singly, it is preferable because occurrence of stain and other side effects, for example, due to the production of a color-formed dye by reaction of the coupler with the color-developing agent or its oxidized product remaining in the film during the storage after the processing, can be prevented.
In the photographic material according to the present invention, various anti-fading agent can be used. That is, as organic anti-fading agents for cyan, magenta and/or yellow images, hydroquinones, 6-hydroxychromans, 5-hydroxycoumarans, spirochromans, p-alkoxyphenols, hindered phenols, including bisphenols, gallic acid derivatives, methylenedioxybenzenes, aminophenols, hindered amines, and ether or ester derivatives obtained by silylating or alkylating the phenolic hydroxyl group of these compounds can be mentioned typically. Metal complexes such as (bissalicylaldoximato)nickel complex and (bis-N,N-dialkyldithiocarbamato)nickel complexes can also be used.
As specific examples of the organic anti-fading agents can be mentioned hydroquinones as described, for example, in U.S. Pat. Nos. 2,360,290, 2,418,613, 2,700,453, 2,701,197, 2,728,659, 2,732,300, 2,735,765, 3,982,944, and 4,430,425, British Patent No. 1,363,921, and U.S. Pat. Nos. 2,710,801 and 2,816,028; 6-hydroxychromans, 5-hydroxycoumarans, and spirochromans as described, for example, in U.S. Pat. Nos. 3,432,300, 3,573,050, 3,574,627, 3,698,909, and 3,764,337 and JP-A No.152225/1987; spiroindanes as described in U.S. Pat. No. 4,360,589; p-alkoxyphenols as described, for example, in U.S. Pat. No. 2,735,765, British Patent No. 2,066,975, JP-A No. 10539/1984, and JP-B No. 19765/1982; hindered phenols as described, for example, in U.S. Pat. Nos. 3,700,455 and 4,228,235, JP-A No. 72224/1977, and JP-B No. 6623/1977; gallic acid derivatives as described, for example, in U.S. Pat. No. 3,457,079; methylenedioxybenzenes as described, for example, in U.S. Pat. No. 4,332,886; aminophenols as described, for example, in JP-B No. 21144/1981; hindered amines as described, for example, in U.S. Pat. Nos. 3,336,135 and 4,268,593, British Patent Nos. 1,326,889, 1,354,313, and 1,410,846, JP-B No. 1420/1976, and JP-A Nos. 114036/1983, 53846/1984, and 78344/1984; and metal complexes as described, for example, in U.S. Pat. Nos. 4,050,938 and 4,241,155, and British Patent 2,027,731(A). To attain the purpose, these compounds can be added to the photosensitive layers by coemulsifying them with the corresponding couplers, with the amount of each compound being generally 5 to 100 wt. % for the particular coupler.
When the photographic material of the present invention is a direct positive color photographic material, nucleating agents, such as hydrazine series compounds and quaternary compounds described, for example, in Research Disclosure No. 22534 (January 1983) and nucleation accelerators that will promote the effect of such nucleating agent, can be used.
As a colored coupler to rectify the unnecessary absorption of color-forming dyes, those couplers described in paragraph VII-G of Research Disclosure No. 17643, U.S. Pat. Nos. 4,163,670, JP-B No. 39413/1982, U.S. Pat. Nos. 4,004,929, and 4,138,258, British Patent No. 1,146,368 are preferable. Further, it is preferable to use couplers to rectify the unnecessary absorption of color-forming dye by fluorescent dye released upon the coupling described in U.S. Pat. No. 4,774,181 and couplers having a dye precursor, as a group capable of being released, that can react with the developing agent to form a dye described in U.S. Pat. No. 4,777,120.
As a coupler which forms a dye having moderate diffusibility, those described in U.S. Pat. No. 4.366,237, British Patent No. 2,125,570, European Patent No. 96,570, West German Patent Application (OLS) No. 3,234,533 are preferable.
Typical examples of a polymerized dye-forming coupler are described in U.S. Pat. Nos. 3,451,820, 4,080,211, 4,367,282, 4,409,320, and 4,576,910, and British Patent No. 2,102,173.
A coupler that releases a photographically useful residue accompanied with the coupling reaction can be used favorably in this invention. As a DIR coupler that releases a development retarder, those described in patents cited in paragraph VII-F of the above-mentioned Research Disclosure No. 17643, JP-A Nos. 151944/1982, 154234/1982, 184248/1985, and 37346/1988, and U.S. Pat. Nos. 4,286,962 and 4,782,012 are preferable.
As a coupler which releases, imagewisely, a nucleating agent or a development accelerator upon developing, those described in British Patent Nos. 2,097,140 and 2,131,188, and JP-A Nos. 157638/1984 and 170840/1984 are preferable.
Other couplers that can be incorporated in the photographic material of this invention include competitive couplers described in U.S. Pat. No. 4,130,427, multi-equivalent couplers described in U.S. Pat. Nos. 4,283,472, 4,338,393, and 4,310,618, couplers which release a DIR redox compound, couplers which release a DIR coupler, and redox compounds which release a DIR coupler or a DIR redox described in JP-A Nos. 185950/1985 and 24252/1987, couplers which release a dye to regain a color after releasing described in European Patent No. 173,302A, couplers which release a bleaching-accelerator described in RD. Nos. 11449 and 24241, and JP-A No. 201247/1986, couplers which release a ligand described in U.S. Pat. No. 4,553,477, couplers which release a leuco dye described in JP-A No. 75747/1988, and couplers which release a fluorescent dye described in U.S. Pat. No. 4,774,181.
To the photographic material according to the present invention, a mildew-proofing agent described, for example, in JP-A No. 271247/1988, is preferably added in order to prevent the growth of a variety of mildews and fungi that will propagate in the hydrophilic layer and deteriorate the image thereon.
As a support to be used for the photographic material of the present invention, a white polyester support for display may be used, or a support wherein a layer containing white pigment is provided on the side that will have a silver halide layer. Further, in order to improve sharpness, preferably an anti-halation layer is applied on the side of the support where the silver halide layer is applied or on the undersurface of the support. In particular, preferably the transmission density of the base is set in the range of 0.35 to 0.8, so that the display can be appreciated through either reflected light or transmitted light.
The photographic material of the present invention may be exposed to visible light or infrared light. The method of exposure may be low-intensity exposure or high-intensity short-time exposure, and particularly in the later case, the laser scan exposure system, wherein the exposure time per picture element is less than 10.sup.-4 sec is preferable.
When exposure is carried out, the band stop filter, described in U.S. Pat. No. 4,880,726, is preferably used. Thereby light color mixing is eliminated and the color reproduction is remarkably improved.
The exposed photographic material may be subjected to conventional black-and-white development processing or color processing, and in a case of a color photographic material, preferably it is subjected to color development processing and then is bleached and fixed for the purpose of rapid processing. In particular, when the above-mentioned high-silver-chloride emulsion is used, the pH of the bleach-fix solution is preferably about 6.5 or below, more preferably about 6 or below, for the purpose of he acceleration of desilvering.
With respect to silver halide emulsions, other materials (e.g., additives) and photographic component layers (e.g., layer arrangement) that will be applied to the photographic material of the present invention, as well as processing methods and processing additives that will be applied to the photographic material of the present invention, particularly those described in below-mentioned patent publications, particularly in European Patent EP 0,355,660A2 (JP-A No. 139544/1990), are preferably used.
__________________________________________________________________________Elementconstitutingphotographicmaterial JP-A No. 215272/1987 JP-A No. 33144/1990 EP 0,355,660A2__________________________________________________________________________Silver halide p. 10 upper right column line p. 28 upper right column line p. 45 line 53 toemulsion 6 to p. 12 lower left 16 to p. 29 lower right p. 47 line 3 and column line 5, and column line 11 and p. 47 lines 20 to 22 p. 12 lower right column line p. 30 lines 2 to 5 4 from the bottom to p. 13 upper left column line 17Solvent for p. 12 lower left column line -- --silver halide 6 to 14 and p. 13 upper left column line 3 from the bottom to p. 18 lower left column last lineChemical p. 12 lower left column line p. 29 lower right column p. 47 lines 4 to 9sensitizing 3 from the bottom to lower line 12 to last lineagent right column line 5 from the bottom and p. 18 lower right column line 1 to p. 22 upper right column line 9 from the bottomSpectral p. 22 upper right column line p. 30 upper left column p. 47 lines 10 to 15sensitizing 8 from the bottom to p. 38 lines 1 to 13agent (method) last lineEmulsion p. 39 upper left column line p. 30 upper left column p. 47 lines 16 to 19stabilizer 1 to p. 72 upper right line 14 to upper right column last line column line 1Developing p. 72 lower left column line -- --accelerator 1 to p. 91 upper right column line 3Color coupler p. 91 upper right column p. 3 upper right column line p. 4 lines 15 to 27,(Cyan, Magent, line 4 to p. 121 upper 14 to p. 18 upper left p. 5 line 30 toand Yellow left column line 6 column last line and p. 28 last line,coupler) p. 30 upper right column p. 45 lines 29 to 31 line 6 to p. 35 lower and right column line 11 p. 47 line 23 to p. 63 line 50Color Formation- p. 121 upper left column -- --strengthen line 7 to p. 125 upperagent right column line 1Ultra p. 125 upper right column p. 37 lower right column p. 65 lines 22 to 31violet line 2 to p. 127 lower line 14 to p. 38 upperabsorbent left column last line left column line 11Discoloration p. 127 lower right column p. 36 upper right column p. 4 line 30 toinhibitor line 1 to p. 137 lower line 12 to p. 37 upper p. 5 line 23,(Image-dye left column line 8 left column line 19 p. 29 line 1 tostabilizer) p. 45 line 25 p. 45 lines 33 to 40 and p. 65 lines 2 to 21High-boiling p. 137 lower left column p. 35 lower right column p. 64 lines 1 to 51and/or low- line 9 to p. 144 upper line 14 to p. 36 upperboiling solvent right column last line left column line 4Method for p. 144 lower left column p. 27 lower right column p. 63 line 51 todispersing line 1 to p. 146 upper line 10 to p. 28 upper left p. 64 line 56additives for right coulumn line 7 column last line andphotograph p. 35 lower right column line 12 to p. 36 upper right column line 7Film Hardener p. 146 upper right column -- -- line 8 to p. 155 lower left column line 4Developing p. 155 lower left column line -- --Agent 5 to p. 155 lower rightprecursor column line 2Compound p. 155 lower right column -- --releasing lines 3 to 9developmentrestrainerBase p. 155 lower right column p. 38 upper right column p. 66 line 29 to line 19 to p. 156 upper line 18 to p. 39 upper p. 67 line 13 left column line 14 left column line 3Constitution of p. 156 upper left column p. 28 upper right column p. 45 lines 41 to 52photosensitive line 15 to p. 156 lower lines 1 to 15layer right column line 14Dye p. 156 lower right column p. 38 upper left column line p. 66 lines 18 to 22 line 15 to p. 184 lower 12 to upper right column ringt column last line line 7Color-mix p. 185 upper left column p. 36 upper right column p. 64 line 57 toinhibitor line 1 to p. 188 lower lines 8 to 11 p. 65 line 1 right column line 3Gradation p. 188 lower right column -- --controller lines 4 to 8Stain p. 188 lower right column p. 37 upper left column last p. 65 line 32inhibitor line 9 to p. 193 lower line to lower right to p. 66 line 1 right column line 10 column line 13Surface- p. 201 lower left column p. 18 upper right column line --active line 1 to p. 210 upper 1 to p. 24 lower rightagent right column last line column last line and p. 27 lower left column line 10 from the botom to lower right column line 9Fluorine- p. 210 lower left column p. 25 upper left column --containing line 1 to p. 222 lower line 1 to p. 27 loweragent left column line 5 right column line 9(As Antistaticagent, coating aid,lubricant, adhesioninhibitor, or the like)Binder p. 222 lower left column line p. 38 upper right column p. 66 lines 23 to 28(Hydrophilic 6 to p. 225 upper left lines 8 to 18colloid) column last lineThickening p. 225 upper right column -- --agent line 1 to p. 227 upper right column line 2Antistatic p. 227 upper right column -- --agent line 3 to p. 230 upper left column line 1Polymer latex p. 230 upper left column line -- --latex 2 to p. 239 last lineMatting agent p. 240 upper left column line -- -- 1 to p. 240 upper right column last linePhotographic p. 3 upper right column p. 39 upper left column line p. 67 line 14 toprocessing line 7 to p. 10 upper 4 to p. 42 upper p. 69 line 28method right column line 5 left column last line(processingprocess, additive, etc.)__________________________________________________________________________ Note: In the cited part of JPA No. 21572/1987, amendment filed on March 16, 1987 is included.
Further, as cyan couplers, diphenylimidazole cyan couplers described in JP-A No. 33144/1990, as well as 3-hydroxypyridine cyan dye-forming couplers described in European Patent EP 0,333,185A2 (in particular one obtained by causing Coupler (42), which is a four-equivalent coupler, to have a chlorine coupling split-off group, thereby rendering it to two-equivalent, and Couplers (6) and (9), which are listed as specific examples, are preferable) and cyclic active methylene cyan dye-forming couplers described in JP-A No. 32260/1990 (in particular, specifically listed Coupler Examples 3, 8, and 34 are preferable) are preferably used.
As a method for color development processing of a photographic material using a high-silver-chloride emulsion, the method described in ,for example, JP-A No. 207250/1990, page 27 (the left upper column) to page 34 (the right upper column), is preferably used.
According to the silver halide color photographic material of the present invention, a photographic material excellent in the stability of coupler-emulsified dispersion, the spectral absorption characteristics of a yellow color-formed dye, and its fastness, can be provided.
In addition, in this case, other photographic characteristics, including typically fastness to heat and humidity and emulsion stability, are not adversely influenced.

The present invention will be described in more detail in accordance with Examples, but the invention is not limited to these Examples.
EXAMPLE 1
A yellow color-forming monolayer photographic material No. 1 was prepared by coating three layers that consists of an emulsion layer, an UV absorbing layer, and a protecting layer, compositions of which are shown below, on a prime-coated triacetate cellulose base. Figures shown represent each coating amount (in g/m.sup.2), and the coating amount of silver halide emulsion is shown in terms of silver.
______________________________________First layer (Blue-sensitive emulsion layer)Silver chlorobromide emulsion 0.30Gelatin 1.86Yellow coupler (ExY.sub.1) 0.82Tricresyl phosphate 0.41Second layer (UV absorbing layer)Gelatin 0.53UV absorbent (UV-1) 0.15Dibutyl phthalate 0.08Third layer (Protective layer)Gelatin 1.33Acryl-modified copolymer of polyvinyl 0.17alcohol (modification degree: 17%)Liquid paraffin 0.03______________________________________
Coating solutions of respective layers were prepared in an usual manner. As a gelatin hardener, 1-oxy-3,5-dichloro-s-triazinic acid sodium salt was used in each layer. The preparation method of coating solution will be described specifically with referring to the first layer solution. Preparation of first layer coating solution
To 19.1 g of yellow coupler (ExY.sub.1), 27.2 ml of ethyl acetate and 9.5 g of tricresyl phosphate were added and dissolved. The resulting solution was dispersed and emulsified in 185 ml of 10% aqueous gelatin solution containing 8 ml of sodium dodecylbenzenesulfonate. Separately silver chlorobromide emulsion (cubic grains, 3:7 (silver mol ratio) blend of grains having 0.88 .mu.m and 0.70 .mu.m of average grain size, and 0.08 and 0.10 of deviation coefficient of grain size distribution, respectively, each in which 0.3 mol % of silver bromide was located at the surface of grains) was prepared. Blue-sensitive sensitizing dyes A and B, shown below, were added in this emulsion in such amounts that each dye corresponds 2.0.times.10.sup.-4 mol to the large size emulsion and 2.5.times.10.sup.-4 mol to the small size emulsion, per mol of silver, respectively. The chemical ripening of this emulsion was carried out by adding sulfur and gold sensitizing agents. The above-described emulsified dispersion and this emulsion were mixed together and dissolved, thereby preparing the first layer coating solution. ##STR18##
Next, Samples Nos. 2 to 22 were prepared by the same manner as Sample No.1, except that the yellow coupler was changed to each of yellow couplers of the present invention, and image dye stabilizer S of the present invention was added in an amount of 20 mol % for the coupler.
Each of samples Nos. 1 to 22 thus-prepared was subjected to a gradation exposure to light through three color separated filter for sensitometry using a sensitometer (FWH model made by Fuji Photo Film Co., Ltd., the color temperature of light source was 3200K). At that time, the exposure was carried out in such a manner that the exposure amount was 250 CMS with the exposure time being 0.1 sec.
After exposure to light, each sample was subjected to a processing according to the processing process shown below.
______________________________________Processing Reple- Tankstep Temperature Time nisher* Volume______________________________________Color developing 35.degree. C. 45 sec 161 ml 17 literBleach-fixing 30-35.degree. C. 45 sec 215 ml 17 literRinse (1) 30-35.degree. C. 20 sec -- 10 literRinse (2) 30-35.degree. C. 20 sec -- 10 literRinse (3) 30-35.degree. C. 20 sec 350 ml 10 literDrying 70-80.degree. C. 60 sec______________________________________ Note: *Replenisher amount per m.sup.2 of photographic material. Rinsing steps were carried out in 3tanks countercurrent mode from the tan of rinsing (3) toward the tank of rinsing (1).
The composition of each processing solution is as followed, respectively:
______________________________________ Tank Reple- Solution nisher______________________________________Color-developerWater 800 ml 800 mlEthylenediamine-N,N,N',N'-tetra- 1.5 g 2.0 gmethylene phosphonic acidPotassium bromide 0.015 g --Triethanolamine 8.0 g 12.0 gSodium chloride 1.4 g --Potassium carbonate 25 g 25 gN-ethyl-N-(.beta.-methanesulfonamidoethyl)-3- 5.0 g 7.0 gmethyl-4-aminoaniline sulfateN,N-Bis(carboxymethyl)hydrazine 4.0 g 5.0 gMonosodium N,N-di(sulfoethyl)- 4.0 g 5.0 ghydroxylamineFluorescent whitening agent (WHITEX-4B, 1.0 g 2.0 gmade by Sumitomo Chemical Ind.)Water to make 1000 ml 1000 mlpH (25.degree. C.) 10.05 10.45Bleach-fixing solution(Both tank solution and replenisher)Water 400 mlAmmonium thiosulfate (70 g/l) 100 mlSodium sulfite 17 gIron (III) ammonium ethylenediamine- 55 gtetraacetate dihydrateDisodium ethylenediaminetetraacetate 5 gAmmonium bromide 40 gWater to make 1000 mlpH (25.degree.) 6.0Rinse solution(Both tank solution and replenisher)Ion-exchanged water (calcium andmagnesium each are 3 ppm or below)______________________________________
For the thus-processed samples, transmission absorption spectra was measured, and maximum absorption wavelength (.lambda.max) at the absorbance of 1.0, and the difference between the wavelength that gives a density of 0.a or 0.1 and max (.DELTA..lambda..sub.0.5 and .DELTA..lambda..sub.0.1) were determined. Results are shown in Table 1.
TABLE 1______________________________________ Image-Sam- dye Spectral Absorptionple Yellow Stabilizer Characterics (nm)No. Coupler S .lambda.max/nm .DELTA..lambda..sub.0.5 .DELTA..lambda..sub.0.1 Remarks______________________________________1 ExY.sub.1 -- 445 42.0 79.4 Comparative Example2 Y-1 -- 445 37.2 68.9 Comparative Example3 Y-6 -- 446 36.9 69.8 Comparative Example4 Y-7 -- 446 35.8 69.4 Comparative Example5 Y-9 -- 444 33.5 66.8 Comparative Example6 ExY.sub.1 3-13 445 41.8 79.0 Comparative Example7 " 4-17 445 41.9 79.5 Comparative Example8 " 3-26 444 41.7 78.7 Comparative Example9 " 3-42 445 42.0 79.0 Comparative Example10 Y-1 3-10 445 37.0 68.5 This Invention11 " 4-13 445 37.1 68.9 This Invention12 " 3-17 445 37.5 69.2 This Invention13 " 3-39 444 37.2 68.5 This Invention14 Y-9 3-10 444 33.9 67.2 This Invention15 " 4-13 444 33.8 67.0 This Invention16 " 3-26 443 34.0 67.4 This Invention17 " 3-42 444 33.6 66.8 This Invention______________________________________
As is apparent from the results in Table 1, the yellow color-formed dye obtained from the yellow coupler represented by formula (1) or (2) can give lower .DELTA..lambda..sub.0. .sub.5 and .DELTA..lambda..sub.0.1 than the comparative coupler and a sharp absorption spectrum and does not have unnecessary absorption. That is, it gives a yellow color-formed dye excellent in spectral absorption characteristics compared with the Comparative coupler ExY.sub.1.
Further, when the image-dye stabilizer S represented by formula (3) or (4) is used in combination with these yellow coupler, the change of spectral absorption characteristics is not recognized, showing the excellent property of yellow color-formed dye obtained from the yellow dye-forming coupler of the present invention.
EXAMPLE 2
(1) Preparation of test samples for the stability of emulsion and light-fastness
A comparative sample 201 of multilayer photographic material having layer compositions shown below was prepared by coating various photographic constituting layers on a paper base laminated on both sides thereof with polyethylene film, followed by subjecting to a corona discharge treatment on the surface thereof, and provided a gelatin prime coat layer containing sodium dodecylbenzenesulfonate. Coating solutions were prepared as follows:
Preparation of the first layer coating solution
To a mixture of 19.1 g of yellow coupler (ExY.sub.1) and 0.7 g image-dye stabilizer (Cpd-6) were added and dissolved 27.2 ml of ethyl acetate and each 4.1 g of solvents (Solv-3) and (Solv-7). The resulting solution was dispersed and emulsified in 185 ml of 10% aqueous gelatin solution containing 8 ml of sodium dodecylbenzenesulfonate, thereby prepared emulsified dispersion A. Separately silver chlorobromide emulsion A (cubic grains, 3:7 (silver molar ratio) blend of grains having 0.88 .mu.m and 0.70 .mu.m of average grain size, and 0.08 and 0.10 of deviation coefficient of grain size distribution, respectively, each in which 0.3 mol % of silver bromide was located at the surface of grains) was prepared. Blue-sensitive sensitizing dyes A and B, shown below, were added in this emulsion A in such amounts that each dye corresponds 2.0.times.10.sup.-4 mol to the large size emulsion A and 2.5.times.10.sup.-4 mol to the small size emulsion A, per mol of silver, respectively. The chemical ripening was carried out by adding sulfur and gold sensitizing agents. The above-described emulsified dispersion A and this emulsion A were mixed together and dissolved to give the composition shown below, thereby preparing the first layer coating solution.
Coating solutions for the second to seventh layers were also prepared in the same manner as the first layer coating solution. As a gelatin hardener for the respective layers, 1-hydroxy-3,5-dichloro-s-triazine sodium salt was used.
Further, Cpd-9 and Cpd-10 were added in each layer in such amounts that the respective total amount becomes 25.0 mg/m.sup.2 and 50 mg/m.sup.2.
As spectral-sensitizing dyes for the respective layers, the following compounds were used: ##STR19##
To the red-sensitive emulsion layer, the following compound was added in an amount of 2.6.times.10.sup.-3 mol per mol of silver halide: ##STR20##
Further, 1-(5-methylureidophenyl)-5-mercaptotetrazole was added to the blue-sensitive emulsion layer the green-sensitive emulsion layer, and the red-sensitive emulsion layer in amount of 8.5.times.10.sup.-5 mol, 7.0.times.10.sup.-4 mol, and 2.5.times.10.sup.-4 mol, per mol of silver halide, respectively.
Further, 4-hydroxy-6-methyl-1,3,3a,7-tetrazaindene was added to the blue-sensitive emulsion layer and the green-sensitive emulsion layer in amount of 1.times.10.sup.-4 mol and 2.times.10.sup.-4 mol, per mol of silver halide, respectively.
The dyes shown below (figure in parentheses represents coating amount) were added to the emulsion layers for prevention of irradiation. ##STR21##
(Composition of Layers)
The composition of each layer is shown below. The figures represent coating amount (g/m2). The coating amount of each silver halide emulsion is given in terms of silver.
______________________________________Supporting BasePaper laminated on both sides with polyethylene(a white pigment, TiO.sub.2, and a bluish dye, ultra-marine, were included in the first layer side ofthe polyethylene-laminated film)First Layer (Blue-sensitive emulsion layer)The above-described silver chlorobromide 0.27emulsion AGelatin 1.86Yellow coupler (ExY.sub.1) 0.82Image-dye stabilizer S 0.25Solvent (Solv-3) 0.18Solvent (Solv-7) 0.18Image-dye stabilizer (Cpd-6) 0.06Second Layer (Color-mix preventing layer)Gelatin 0.99Color-mix inhibitor (Cpd-4) 0.08Solvent (Solv-1) 0.16Solvent (Solv-4) 0.08Third Layer (Green-sensitive emulsion layer)Silver chlorobromide emulsions (cubic grains, 0.121:3 (Ag mol ratio) blend of large sizeemulsion B having average grain size of0.55 .mu.m and small size emulsion B havingaverage grain size of 0.39 .mu.m, each of whosedeviation coefficient of grain sizedistribution is 0.10 and 0.08, respectively,each in which 0.8 mol % of AgBr was locatedat the surface of grains)Gelatin 1.24Magenta coupler (ExM) 0.23Image-dye stabilizer (Cpd-1) 0.03Image-dye stabilizer (Cpd-2) 0.16Image-dye stabilizer (Cpd-3) 0.02Image-dye stabilizer (Cpd-8) 0.02Solvent (Solv-2) 0.40Fourth Layer (Color-mix preventing layer)Gelatin 1.58Ultraviolet-absorber (UV-1) 0.47Color-mix inhibitor (Cpd-4) 0.05Solvent (Solv-5) 0.24Fifth Layer (Red-sensitive emulsion layer)Silver chlorobromide emulsions (cubic grains, 0.231:4 (Ag mol ratio) blend of large sizeemulsion C having average grain size of0.58 .mu.m and small size emulsion C havingaverage grain size of 0.45 .mu.m, each of whosedeviation coefficient of grain sizedistribution is 0.09 and 0.11, respectively,each in which 0.6 mol % of AgBr was locatedat the surface of grains)Gelatin 1.34Cyan coupler (ExC) 0.32Image-dye stabilizer (Cpd-1) 0.03Image-dye stabilizer (Cpd-3) 0.02Image-dye stabilizer (Cpd-5) 0.18Image-dye stabilizer (Cpd-6) 0.40Image-dye stabilizer (Cpd-7) 0.05Solvent (Solv-6) 0.14Sixth layer (Ultraviolet ray absorbing layer)Gelatin 0.53Ultraviolet absorber (UV-1) 0.16Color-mix inhibitor (Cpd-4) 0.02Solvent (Solv-5) 0.08Seventh layer (Protective layer)Gelatin 1.33Acryl-modified copolymer of polyvinyl 0.17alcohol (modification degree: 17%)Liquid paraffin 0.03______________________________________
Compounds used are as follows: ##STR22##
Samples 202 to 260 were prepared in the same manner as Sample 201, except that the yellow coupler and image-dye stabilizer S represented by formula (3) or (4) in the first layer were changed as shown in Table 2. Then, each of samples was subjected to a gradation exposure to light through three color separated filter for sensitometry using a sensitometer (FWH model made by Fuji Photo Film Co., Ltd., the color temperature of light source was 3200.degree. K.). At that time, the exposure was carried out in such a manner that the exposure amount was 250 CMS with the exposure time being 0.1 sec.
After exposure to light, each sample was subjected to the processing process shown below utilizing processing solutions shown below by using a paper processor.
______________________________________Processing Reple- Tankstep Temperature Time nisher* Volume______________________________________Color developing 35.degree. C. 45 sec 161 ml 17 literBleach-fixing 30-35.degree. C. 45 sec 215 ml 17 literRinse (1) 30-35.degree. C. 20 sec -- 10 literRinse (2) 30-35.degree. C. 20 sec -- 10 literRinse (3) 30-35.degree. C. 20 sec 350 ml 10 literDrying 70-80.degree. C. 60 sec______________________________________ Note: *Replenisher amount per m.sup.2 of photographic material. Rinsing steps were carried out in 3tanks countercurrent mode from the tan of rinsing (3) toward the tank of rinsing (1).
The composition of each processing solution is as followed, respectively:
______________________________________ Tank Reple- Solution nisher______________________________________Color-developerWater 800 ml 800 mlEthylenediamine-N,N,N',N'-tetra- 1.5 g 2.0 gmethylene phosphonic acidPotassium bromide 0.015 g --Triethanolamine 8.0 g 12.0 gSodium chloride 1.4 g --Potassium carbonate 25 g 25 gN-ethyl-N-(.beta.-methanesulfonamidoethyl)-3- 5.0 g 7.0 gmethyl-4-aminoaniline sulfateN,N-Bis(carboxymethyl)hydrazine 4.0 g 5.0 gMonosodium N,N-di(sulfoethyl)- 4.0 g 5.0 ghydroxylamineFluorescent whitening agent (WHITEX-4B, 1.0 g 2.0 gmade by Sumitomo Chemical Ind.)Water to make 1000 ml 1000 mlpH (25.degree. C.) 10.05 10.45Bleach-fixing solution(Both tank solution and replenisher)Water 400 mlAmmonium thiosulfate (70 g/l) 100 mlSodium sulfite 17 gIron (III) ammonium ethylenediamine- 55 gtetraacetate dihydrateDisodium ethylenediaminetetraacetate 5 gAmmonium bromide 40 gWater to make 1000 mlpH (25.degree.) 6.0Rinse solution(Both tank solution and replenisher)Ion-exchanged water (calcium andmagnesium each are 3 ppm or below)______________________________________
(2) Preparation of test sample for evaluation of spectral absorption characteristics of yellow colored dye
Samples 201 to 260 having the same coating composition as the above but paper support was replaced by transparent triacetate cellulose support were prepared and were processed in the same manner.
Evaluation test or the above processed samples was conducted by the following procedure.
(Spectral Absorption Characteristics)
Transmission absorption spectra was measured, and maximum absorption wavelength (.lambda.max) at the absorbance of 1.0, and the difference between the wavelength that gives a density of 0.5 or 0.1 and max (.DELTA..lambda..sub.0.5 and .DELTA..lambda..sub.0.1) were determined.
(Light-fastness)
Each sample was irradiated with light for five days using a Xenon fade meter (100,000 Lux). Light-fastness is expressed in a ratio (%) of density (D) after the light irradiation to an initial density (D=1.0).
(Stability of emulsion)
The average particle diameter of the above obtained emulsified dispersion was determined, and the change of average particle diameter of the dispersion after aging 7 days by stirring in a heated solubilized state a 45.degree. C. was evaluated. For the measurement of average particle diameter Nonosizer made by Coulter Co. in England was used.
Results are shown in Table 2. PG,127
TABLE 2__________________________________________________________________________ Image-dye Stability Residual Stabilizer of Emulsion Rate ofSample Yellow S After YellowNO. Coupler (0.25 g/m.sup.2)* Fr. Aging Dye (%) Remarks__________________________________________________________________________201 ExY.sub.1 -- 0.19 0.38 79 Comparative Example202 ExY.sub.2 -- 0.20 0.39 76 "203 Y-1 -- 0.20 0.38 77 "204 Y-6 -- 0.21 0.38 77 "205 Y-9 -- 0.20 0.37 78 "206 Y-21 -- 0.20 0.37 76 "207 Y-31 -- 0.20 0.38 77 "208 Y-40 -- 0.19 0.36 77 "209 Y-51 -- 0.21 0.38 78 "210 Y-52 -- 0.20 0.38 77 "211 Y-68 -- 0.21 0.38 77 "212 ExY.sub.1 3-13 0.20 0.49 81 "213 " 4-17 0.19 0.48 82 "214 " 3-26 0.20 0.50 81 "215 " 3-42 0.20 0.49 82 "216 ExY.sub.2 3-13 0.20 0.49 79 "217 " 4-17 0.20 0.48 78 "218 " 3-26 0.21 0.50 78 "219 Y-1 3-13 0.20 0.36 83 This Invention220 Y-8 " 0.19 0.35 83 "221 Y-31 " 0.20 0.36 82 "222 Y-52 " 0.20 0.35 83 "223 Y-68 " 0.21 0.36 82 "224 Y-1 4-17 0.19 0.35 82 "225 Y-7 " 0.20 0.37 82 "226 Y-31 " 0.20 0.36 81 "227 Y-50 " 0.19 0.36 83 "228 Y-52 " 0.20 0.36 82 "229 Y-6 3-39 0.20 0.35 83 "230 Y-21 " 0.19 0.35 82 "231 Y-51 3-39 0.20 0.36 83 This Invention232 Y-1 3-9 0.20 0.37 83 "233 " 3-16 0.20 0.37 82 "234 " 4-1 0.19 0.36 82 "235 " 4-12 0.19 0.37 82 "236 " 3-17 0.19 0.36 83 "237 " 3-39 0.20 0.36 83 "238 " 3-51 0.20 0.37 82 "239 Y-9 3-1 0.20 0.36 82 "240 " 3-10 0.21 0.36 82 "241 " 4-13 0.20 0.35 82 "242 " 3-17 0.19 0.35 82 "243 " 3-39 0.20 0.35 83 "244 " 3-54 0.21 0.36 82 "245 Y-31 3-13 0.20 0.35 81 "246 " 4-13 0.20 0.36 82 "247 " 3-33 0.21 0.36 82 "248 " 3-65 0.20 0.35 82 "249 Y-67 3-10 0.20 0.37 82 "250 " 4-4 0.20 0.36 82 "251 " 3-39 0.20 0.36 83 "252 " 3-51 0.21 0.37 82 "253 Y-68 3-13 0.20 0.35 82 "254 " 4-13 0.20 0.36 81 "255 " 3-17 0.19 0.35 82 "256 " 3-42 0.19 0.35 82 "257 Y-73 3-1 0.20 0.37 81 "258 " 4-12 0.21 0.37 81 "259 " 3-26 0.21 0.38 82 "260 " 3-73 0.21 0.37 81 "__________________________________________________________________________ Note; Coating amount
As is apparent from the results in Table 2, with respect to Comparative Samples 212 to 218, in which compounds represented by formula (3) or (4) were used in combination with the Comparative coupler ExY.sub.1 or ExY.sub.2, the light-fastness of yellow color-formed dye was certainly improved, but the spectral absorption characteristics was remained not being improved and the change of average diameter of the emulsified dispersion after aging at solubilized state was large such width of change that it was deteriorated compared with Sample 201 to 211 in which the Image-dye stabilizer S was not used.
On the contrary, when a yellow coupler represented by formula (1) or (2) and a compound represented by formula (3) or (4) are simultaneously used according to this invention, yellow dyes excellent in spectral absorption characteristics are obtained at the same time that the light-fastness is improved. Further, the increasing ratio of average particle diameter is reduced compared with Comparative Samples.
Separately, Samples were processed in a continuous processing (running test) until the replenishing amount of color developer reached twice the volume of tank, and the similar effect to the above was confirmed by the similar test of processed sample.
EXAMPLE 3
Samples 102 to 112 were prepared in the same manner as Sample 101 in Example 1 described in the published document of JP-A No. 854/1990, except that Yellow coupler represented by formula (3) and Image-dye stabilizers S represented by formula (4) or (5) of the present invention were used instead of Coupler C-5 in the 12th layer and Coupler C-7 in the 13th layer, respectively, as shown in Table 3. Samples were processed, after exposed to blue light of gradation, in the same procedure in Example 1 of said published document, and it was found that yellow colored dye of sample prepared by utilizing yellow coupler of this invention was excellent in spectral absorption characteristics without the deterioration of color formation due to using Image-dye stabilizer S.
The light-fastness of yellow dye of each processed Sample after an irradiation of light for 10 days in a Xenon fade meter was determined and expressed in a percentage of density after irradiation to the initial density 3.5.
Results are shown in Table 3.
TABLE 3______________________________________ Image- Residual Ra-Sam- dye tio ofple Yellow Stabilizer Yellow DyeNO. Coupler S* Density (%) Remarks______________________________________101 C-5,C-7 -- 74 Comparative Example102 " 3-1 78 "103 " 4-17 78 "104 " 3-17 78 "105 " 3-44 77 "106 Y-53 3-13 80 This Invention107 " 4-12 79 "108 " 3-17 79 "109 " 3-90 79 "110 Y-67 3-10 79 "111 " 4-17 79 "112 " 3-39 80 "113 " 3-51 79 "______________________________________ Note; *The coating amount of imagedye stabilizer was 0.20 g/m.sup.2.
Thus, yellow color-formed dyes not only excellent in spectral absorption characteristics but also having an improved light-fastness without lowering stability of emulsion can be obtained by a combination use of yellow coupler represented by formula (1) or (2) and a compound represented by formula (3) or (4) of the present invention.
EXAMPLE 4
Samples B to M were prepared in the same manner as Sample A3 in Example 2 described in the published document of JP-A No. 158431/1989, except that Yellow coupler represented by formula (1) or (2) and Image-dye stabilizers S represented by formula (3) or (4) of the present invention were used instead of yellow coupler ExY-1 in the 11th layer and the 12th layer, respectively, as shown in Table 4. Samples were processed, after exposed to blue light of gradation, in the same procedure in Example 1 of said published document, and it was found that yellow colored dye of sample prepared by utilizing yellow coupler of this invention was excellent in spectral absorption characteristics without the deterioration of color formation due to using Image-dye stabilizer S.
The light-fastness of yellow dye of each processed Sample after an irradiation of light for 10 days in a Xenon fade meter was determined and expressed in a percentage of density after irradiation to the initial density 1.5.
Results are shown in Table 4.
TABLE 4______________________________________ Residual Ra-Sam- Yellow Image-dye tio ofple Coup- Stabilizer S Yellow DyeNO. ler (0.15 g/m.sup.2)* Density (%) Remarks______________________________________A3 ExY-1 -- 76 Comparative ExampleB " 3-1 83 "C " 4-5 83 "D " 3-35 83 "E " 3-44 84 "F Y-1 3-13 85 This InventionG " 4-12 86 "H " 3-17 85 "I " 3-90 85 "J Y-31 3-10 85 "K " 4-17 84 "L " 3-39 86 "M " 3-51 85 "______________________________________ Note; *Coating amount
Thus, yellow color-formed dyes not only excellent in spectral absorption characteristics but also having an improved light-fastness without lowering color forming property can be obtained by a combination use of yellow coupler represented by formula (1) or (2) and a compound represented by formula (3) or (4) of the present invention.
EXAMPLE 5
Photosensitive material samples 2 to 13 were prepared in the same manner as photosensitive material Sample 1 in Example 1 described in the published document of JP-A No. 93641/1990, except that Yellow coupler represented by formula (1) or (2) and Image-dye stabilizers S represented by formula (3) or (4) of the present invention were used instead of yellow coupler (Ex-9) in the 11th layer, 12th layer, and 13th layer, respectively, as shown in Table 5. Samples were processed, after exposed to blue light of gradation, in the same procedure in Example 1 of said published document, and it was found that yellow colored dye of sample prepared by utilizing yellow coupler of this invention was excellent in spectral absorption characteristics without the deterioration of colorformation due to using Image-dye stabilizer S.
The light-fastness of yellow dye of each processed Sample after an irradiation of light for 10 days in a Xenon fade meter was determined and expressed in a percentage of density after irradiation to the initial density 1.5.
Results are shown in Table 5.
TABLE 5______________________________________ Residual Ra-Sam- Yellow Image-dye tio ofple Coup- Stabilizer Yellow DyeNO. ler S* Density (%) Remarks______________________________________1 Ex-9 -- 86 Comparative Example2 " 3-13 90 "3 " 4-17 91 "4 " 3-17 92 "5 " 3-40 91 "6 Y-67 3-9 93 This Invention7 " 4-12 93 "8 " 3-17 94 "9 " 3-42 94 "10 Y-68 3-16 94 "11 " 4-4 94 "12 " 3-26 95 "13 " 3-51 95 "______________________________________ Note; *The coating amount of imagedye stabilizer was 0.20 g/m.sup.2.
Thus, yellow color-formed dyes not only excellent in spectral absorption characteristics but also having an improved light-fastness without deteriorating the stability of emulsion be obtained by a combination use of yellow coupler represented by formula (1) or (2) and a compound represented by formula (3) or (4) of the present invention.
Having described our invention as related to the present embodiments, it is our intention that the invention not be limited by any of the details of the description, unless otherwise specified, but rather be construed broadly within its spirit and scope as set out in the accompanying claims.

Number	Date	Country
3-108801	Apr 1991	JPX
3-185396	Jun 1991	JPX
3-313074	Nov 1991	JPX

Number	Name	Date
4149886	Tanaka et al.	Apr 1979
4579816	Ohlschlager et al.	Apr 1986
4857444	Hirose et al.	Aug 1989
4863840	Komorita et al.	Sep 1989
5006452	Bucci	Apr 1991
5194369	Mihayashi et al.	Mar 1993
5213958	Motoki et al.	May 1993
5238803	Ichijima et al.	Aug 1993

Number	Date	Country
0447920	Sep 1991	EPX
1204680	Sep 1970	GBX

Silver halide color photographic material

Information

Patent Number

Date Filed

Date Issued

Inventors

Original Assignees

Examiners

Agents

CPC

US Classifications

Field of Search

US

International Classifications

Abstract

Description

Claims

Priority Claims (3)

US Referenced Citations (8)

Foreign Referenced Citations (2)

Non-Patent Literature Citations (1)