Silver Halide Color Photographic Light-Sensitive Material

The present invention relates to a silver halide color photographic light-sensitive material containing a novel cyan color image forming polymer coupler latex capable of coupling with an oxidation product of an aromatic primary amine developing agent.

It is well known that upon the color development of a silver halide photographic light-sensitive material, after exposure, an oxidized aromatic primary amine developing agent can be reacted with a dye forming coupler to obtain a color image.

It is also known that, for the color development of a silver halide color photographic material, an oxidized aromatic primary amine developing agent can be reacted with a coupler to form a dye such as an indophenol, an indoaniline, an indamine, an azomethine, a phenoxazine, a phenazine, and the like, thus forming a color image. In this procedure, the subtractive color process is ordinarily used for color reproduction, and silver halide emulsions which are selectively sensitive to blue, green and red lights, and yellow, magenta and cyan color image formers, which are respectively the complementary colors of blue, green and red, are employed. For example, a coupler of the acylacetanilide or benzoylmethane type is used for forming a yellow color image; a coupler of the pyrazolone, pyrazolobenzimidazole, cyanoacetophenone or indazolone type is generally used for forming a magenta color image; and a coupler of the phenol type, such as a phenol and a naphthol, is generally used for forming a cyan color image.

It is also required in a multilayer color photographic light-sensitive material that each coupler is fixed in a layer separated from each other in order to reduce color mixing and improve color reproduction. Many methods for rendering a coupler diffusion-resistant are known. One method is to introduce a long chain aliphatic group into a coupler molecule in order to prevent diffusion. Couplers according to such a method require a step of addition to an aqueous gelatin solution by solubilizing in alkali, or a step of dispersing in an aqueous gelatin solution by dissolving in an organic solvent having a high boiling point, since the couplers are immiscible with an aqueous gelatin solution. Such color couplers may cause crystal formation in a photographic emulsion. Furthermore, when using an organic solvent having a high boiling point, a large amount of gelatin must be employed since the organic solvent having a high boiling point makes an emulsion layer soft. Consequently, this increases the thickness of the material even though it is desirable to reduce the thickness of the emulsion layer.

Another method for rendering a coupler diffusion-resistant is to utilize a polymer coupler latex obtained by polymerization of a monomeric coupler. An example of a method for adding a polymer coupler in a latex form to a hydrophilic colloid composition is a method in which a latex prepared by an emulsion polymerization method is directly added to a gelatino silver halide emulsion and a method in which an oleophilic polymer coupler obtained by polymerization of a monomeric coupler is dispersed in a latex form in an aqueous gelatin solution. Some examples of the former emulsion polymerization methods include an emulsion polymerization method in an aqueous gelatin phase as described in U.S. Pat. No. 3,370,952 and an emulsion polymerization method in water as described in U.S. Pat. No. 4,080,211. An example of the latter method in which an oleophilic polymer coupler is dispersed in a latex form is described in U.S. Pat. No. 3,451,820.

The addition of cyan polymer couplers in a latex form to a gelatino silver halide emulsion layer is known as described in West German Pat. No. 2,725,591, U.S. Pat. Nos. 3,926,436 and 3,767,412 and Research Disclosure, No. 21728 (1982), in addition to the above-described patents.

The method of adding a polymer coupler in a latex form to a hydrophilic colloid composition has many advantages in comparison with other methods. First, the strength of the film formed is not deteriorated, because the hydrophobic substance is in a latex form. Second, since the latex can contain coupler monomers in a high concentration, it is easy to incorporate couplers in a high concentration into a photographic emulsion, and the crystallization of couplers in the emulsion layer is eliminated. Third, since the increase of viscosity is small, it is possible to reduce the thickness of the emulsion layer which results in the improvement in sharpness. Fourth, color mixing is prevented, since a polymer coupler is completely immobilized.

However, these polymer coupler latexes have unsolved problems as well as many excellent features such as those described above. In particular, the problem of a cyan polymer coupler latex is color stain which occurs upon irradiation of light to color photographic material containing the cyan polymer coupler latex (hereinafter referred to as light stain).

Since a color photographic material contains many organic compounds which include a coupler as a representative example, these organic compounds are decomposed to form various kinds of colored substances when the color photographic material is irradiated with light. The colored substances are the origin of the light stain, particularly in non-image areas or areas of low optical density.

Many techniques for preventing the occurrence of light stain have been known. For example, a method is known in which a 2-(2'-hydroxyphenyl)benzotriazole compound is incorporated into a photographic silver halide emulsion layer to prevent the occurrence of light stain as described in U.S. Pat. No. 3,253,921.

However, this method is not always sufficient because the effect on preventing light stain decreases somewhat when the 2-(2'-hydroxyphenyl)benzotriazole compound is added in a large amount or the color forming property of the coupler is reduced.

Therefore, an object of the present invention is to provide a novel cyan color image forming polymer coupler latex which provides a lower degree of light stain in a color photograph after development processing than in conventional methods.

Another object of the present invention is to provide a novel cyan color image forming polymer coupler latex which has an excellent color forming property.

A further object of the present invention is to provide a method of forming a cyan color image by development of a silver halide emulsion in the presence of a novel cyan color image forming polymer coupler latex.

A still further object of the present invention is to provide a silver halide color photographic light-sensitive material containing a novel cyan color image forming polymer coupler latex, and a photographic processing method or an image forming method for using the material.

Other objects of the present invention will be apparent from the following detailed description and examples.

As a result of extensive investigations, it has now been found that these objects of the present invention are accomplished by the use of a cyan color image forming polymer coupler latex which comprises (1) at least one repeating unit of a cyan coupler corresponding to the following general formula (Ia): ##STR2## wherein R.sub.1 represents a hydrogen atom, a lower alkyl group containing from 1 to 4 carbon atoms or a chlorine atom; and Q.sub.a represents a cyan coupler moiety-containing group capable of forming a dye upon coupling with an oxidized aromatic primary amine developing agent, and (2) at least one repeating unit of a monomer corresponding to the following general formula (II): ##STR3## wherein R.sub.2 represents a hydrogen atom, a lower alkyl group containing from 1 to 4 carbon atoms or a chlorine atom; A represents --O-- or --NH--; and Z represents ##STR4## wherein R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7, which may be the same or different, each represents a hydrogen atom, an alkyl group, an alkenyl group, an alkoxy group, a halogen atom, a carboxy group, a hydroxy group, a nitro group, an aryl group, an acyloxy group, an aryloxy group, an alkylthio group, an arylthio group, a mono- or dialkylamino group, an acylamino group, a sulfonamido group or a 5-membered or 6-membered heterocyclic group containing an oxygen atom or a nitrogen atom, or R.sub.6 and R.sub.7 may be bonded each other to form a 5-membered or 6-membered aromatic ring consisting of carbon atoms, and A may be bonded to any of the phenol ring and the benzotriazole ring of Z.

More specifically, the objects of the present invention are accomplished by a silver halide color photographic light-sensitive material comprising a support having thereon at least one silver halide emulsion layer containing the above-described cyan color image forming polymer coupler latex.

The repeating unit of a cyan coupler represented by the general formula (Ia) is preferably a repeating unit of a cyan coupler corresponding to the following general formula (I): ##STR5## wherein R.sub.1 represents a hydrogen atom, a lower alkyl group containing from 1 to 4 carbon atoms or a chlorine atom; and Q represents a cyan coupler residue capable of forming a dye upon coupling with an oxidized aromatic primary amine developing agent.

In more detail, preferred cyan coupler residue for Q which forms a cyan color image upon coupling with an oxidized aromatic primary amine developing agent in the cyan color image forming polymer coupler latex according to the present invention includes a phenol type residue represented by the general formula (III) or (IV) described below and a naphthol type residue represented by the general formula (V) described below. ##STR6## In the above formulae, R.sub.8 represents a hydrogen atom or a lower alkyl group having from 1 to 4 carbon atoms; A.sub.1 bonds to the NH group in the general formula (I) and represents an unsubstituted or substituted alkylene group having from 1 to 10 carbon atoms, an unsubstituted or substituted aralkylene group having from 7 to 22 carbon atoms, a ##STR7## group in which p is an integer of from 1 to 10 (preferably from 1 to 4), or an unsubstituted or substituted phenylene group, where the alkylene group and an alkylene moiety in the aralkylene group may be straight chain or branched chain. Examples of the alkylene group for A.sub.1 include a methylene group, a methylmethylene group, a dimethylmethylene group, a dimethylene group, a trimethylene group, a tetramethylene group, a pentamethylene group, a hexamethylene group, a decylmethylene group, etc. Examples of the aralkylene group for A.sub.1 includes a benzylidene group, etc. Examples of the phenylene group for A.sub.1 include a p-phenylene group, an m-phenylene group, a methylphenylene group, etc. R.sub.9 represents a hydrogen atom or a lower alkyl group having from 1 to 5 carbon atoms (for example, a methyl group, an ethyl group, a tert-butyl group, etc.). R.sub.10 represents an unsubstituted or substituted alkyl group, an unsubstituted or substituted phenyl group or an unsubstituted or substituted phenylamino group. X represents a halogen atom (for example, a fluorine atom, a chlorine atom, a bromine atom, etc.). Y represents a hydrogen atom, a halogen atom (for example, a fluorine atom, a chlorine atom, a bromine atom, etc.) or a substituted alkoxy group. m represents 0 or 1; and n represents 0 or 1.

Substituents for the alkylene group, the aralkylene group or the phenylene group represented by A.sub.1 include an aryl group (for example, a phenyl group, etc.), a nitro group, a hydroxy group, a cyano group, a sulfo group, an alkoxy group (for example, a methoxy group, etc.), an aryloxy group (for example, a phenoxy group, etc.), an acyloxy group (for example, an acetoxy group, etc.), an acylamino group (for example, an acetylamino group, etc.), a sulfonamido group (for example, a methanesulfonamido group, etc.), a sulfamoyl group (for example, a methylsulfamoyl group, etc.), a halogen atom (for example, a fluorine atom, a chlorine atom, a bromine atom, etc.), a carboxy group, a carbamoyl group (for example, a methylcarbamoyl group, etc.), an alkoxycarbonyl group (for example, a methoxycarbonyl group, etc.), a sulfonyl group (for example, a methylsulfonyl group, etc.), and the like. When two or more substituents are present, they may be the same or different.

Substituents for the substituted alkoxy group represented by Y include an aryl group (for example, a phenyl group, etc.), a nitro group, a hydroxy group, a cyano group, a sulfo group, an alkoxy group (for example, a methoxy group, etc.), an aryloxy group (for example, a phenoxy group, etc.), an acyloxy group (for example, an acetoxy group, etc.), an acylamino group (for example, an acetylamino group, etc.), an alkylsulfonamido group (for example, a methanesulfonamido group, etc.), an alkylsulfamoyl group (for example, a methylsulfamoyl group, etc.), a halogen atom (for example, a fluorine atom, a chlorine atom, a bromine atom, etc.), a carboxy group, an alkylcarbamoyl group (for example, a methylcarbamoyl group, etc.), an alkoxycarbonyl group (for example, a methoxycarbonyl group, etc.), an alkylsulfonyl group (for example, a methylsulfonyl group, etc.), an alkylthio group (for example, a .beta.-carboxyethylthio group, etc.), and the like. When two or more substituents are present, they may be the same or different.

Substituent for the alkyl group or the phenyl group represented by R.sub.10 is preferably a fluorine atom. Substituents for the phenylamino group represented by R.sub.10 include a nitro group, a cyano group, a sulfonamido group (for example, a methanesulfonamido group, etc.), a sulfamoyl group (for example, a methylsulfamoyl group, etc.), a halogen atom (for example, a fluorine atom, a chlorine atom, a bromine atom, etc.), a carbamoyl group (for example, a methylcarbamoyl group, etc.), a sulfonyl group (for example, a methylsulfonyl group, etc.), and the like. When two or more substituents are present, they may be the same or different.

Further, the groups represented by R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 of the 2-(2'-hydroxyphenyl)benzotriazole compound represented by Z in the repeating unit represented by the above-described general formula (II) include a hydrogen atom, a halogen atom (for example, a chlorine atom, a bromine atom, an iodine atom, a fluorine atom, etc.), a nitro group, a hydroxy group, an alkyl group (for example, a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an aminopropyl group, an n-butyl group, a sec-butyl group, a tert-butyl group, a chlorobutyl group, an n-amyl group, an isoamyl group, a cyclohexyl group, an octyl group, etc.), an alkenyl group (for example, a vinyl group, an allyl group, etc.), an aryl group (for example, a phenyl group, a 4-methylphenyl group, a 4-ethoxyphenyl group, etc.), an alkoxy group (for example, a methoxy group, an ethoxy group, a butoxy group, a methoxyethoxy group, etc.), an acyloxy group (for example, an acetoxy group, a butyroyloxy group, etc.), an aryloxy group (for example, a phenoxy group, a 4-methylphenoxy group, etc.), an alkylthio group (for example, a methylthio group, an ethylthio group, a benzylthio group, etc.), an arylthio group (for example, a phenylthio group, a methylphenylthio group, etc.), a mono- or dialkylamino group (for example, an N-ethylamino group, an N,N-diethylamino group, etc.), an acylamino group (for example, an acetylamino group, a benzoylamio group, etc.), a sulfonamido group (for example, a methanesulfonamido group, a benzenesulfonamido group, etc.), a carboxy group and a 5-membered or 6-membered heterocyclic group containing an oxygen atom or a nitrogen atom (for example, a piperidino group, a morpholino group, a pyrrolidino group, a piperazino group, etc.), and R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 may be the same or different. Further, R.sub.6 and R.sub.7 may be bonded to each other to form a 5-membered or 6-membered aromatic ring consisting of carbon atoms. When R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 represent a substituent containing an alkyl moiety, an alkenyl moiety or an aryl moiety, the alkyl moiety has from 1 to 22 carbon atoms, the alkenyl moiety has from 2 to 22 carbon atoms and the aryl moiety has from 6 to 22 carbon atoms.

The cyan color image forming polymer coupler latex according to the present invention includes a copolymer wherein one or more non-color forming ethylenically unsaturated monomers are copolymerized together with the ethylenically unsaturated monomer coupler corresponding to the general formula (I) and the ethylenically unsaturated 2-(2'-hydroxyphenyl)benzotriazole monomer corresponding to the general formula (II). Examples of the copolymerizable non-color forming ethylenically unsaturated monomers include an acrylic acid (for example, acrylic acid, an .alpha.-chloroacrylic acid, an .alpha.-alkylacrylic acid such as methacrylic acid, etc.), an ester and an amide derived from an acrylic acid (for example, acrylamide, methacrylamide, n-butylacrylamide, t-butylacrylamide, n-octylacrylamide, diacetoneacrylamide, hydroxymethylacrylamide, n-butylmethacrylamide, methyl acrylate, ethyl acrylate, n-propyl acrylate, n-butyl acrylate, t-butyl acrylate, isobutyl acrylate, 2-ethylhexyl acrylate, n-octyl acrylate, lauryl acrylate, methyl methacrylate, ethyl methacrylate, n-butyl methacrylate, .beta.-hydroxymethacrylate, etc.), a vinyl ester (for example, vinyl acetate, vinyl propionate, vinyl laurate, etc.), acrylonitrile, methacrylonitrile, an aromatic vinyl compound (for example, styrene and a derivative thereof, for example, vinyl toluene, divinyl benzene, vinyl acetophenone, sulfostyrene, etc.), itaconic acid, citraconic acid, crotonic acid, vinylidene chloride, a vinyl alkyl ether (for example, vinyl ethyl ether, etc.), an ester of maleic acid, N-vinyl-2-pyrrolidone, N-vinylpyridine, 2- or 4-vinylpyridine, etc.

Of these monomers, an ester of acrylic acid, an ester of methacrylic acid, an amide of acrylic acid, an amide of methacrylic acid, an ester of maleic acid are particularly preferred.

Two or more non-color fomring ethylenically unsaturated monomers described above can be used together. For example, a combination of methyl acrylate and n-butyl acrylate, methyl acrylate and diacetoneacrylamide, styrene and n-butyl acrylate, etc., can be employed.

The ethylenically unsaturated monomer which is used to copolymerize with the monomer coupler corresponding to the above-described general formula (I) can be selected so that the copolymer to be formed possesses good physical properties and/or chemical properties, for example, solubility, compatibility with a binder such as gelatin in a photographic colloid composition, flexibility, heat stability, etc., as well known in the field of polymer color couplers.

The cyan polymer coupler latex used in the present invention can be prepared, as described above, by dissolving an oleophilic polymer coupler obtained by polymerization of a monomer coupler in an organic solvent and then dispersing the solution in a latex form in an aqueous gelatin solution, or can be directly prepared by an emulsion polymerization method. With respect to the method in which an oleophilic polymer coupler is dispersed in a latex form in an aqueous gelatin solution, the method as described in U.S. Pat. No. 3,451,820 and with respect to the emulsion polymerization, the methods as described in U.S. Pat. Nos. 4,080,211 and 3,370,952 can be employed, respectively.

In the following, general methods for preparing the cyan polymer coupler latexes are described.

Free radical polymerization of an ethylenically unsaturated solid monomer is initiated with the addition to the monomer molecule of a free radical which is formed by thermal decomposition of a chemical initiator, an action of a reducing agent to an oxidative compound (a redox initiator) or a physical action, for example, irradiation of ultraviolet rays or other high energy radiations, high frequencies, etc.

Examples of the chemical initiators commonly used include a water-soluble initiator, for example, a persulfate (such as ammonium persulfate, potassium persulfate, etc.), hydrogen peroxide, 4,4'-azobis(4-cyanovaleric acid), etc.; and a water-insoluble initiator, for example, an azobisisobutyronitrile (such as 2,2'-azobis(2,4-dimethylvaleronitrile, 2,2'-azobisisobutyronitrile, etc.), dimethyl 2,2'-azobisisobutyrate, benzoyl peroxide, chlorobenzoyl peroxide, and other compounds. Examples of the redox initiators usually used include hydrogen peroxide-iron (II) salt, potassium persulfate-potassium hydrogensulfate, cerium salt-alcohol, etc. Specific examples and functions of the initiators are described in F. A. Bovey, Emulsion Polymerization, pages 59 to 93 (Interscience Publishers Inc., New York (1955)).

Solvents which can be used in polymerization of the oleophilic cyan polymer couplers are preferably those which can usually be admixed with monomers to be used without limitation, are good solvents for the oleophilic polymer couplers formed, do not react with initiators to be used and do not interrupt usual actions in free radical addition polymerization.

Specific examples of the solvents which can be used include an aromatic hydrocarbon (for example, benzene, toluene, etc.), a hydrocarbon (for example, n-hexane, etc.), an alcohol (for example, methanol, ethanol, isopropanol, n-propanol, tert-butanol, etc.), a ketone (for example, acetone, methyl ethyl ketone, etc.), a cyclic ether (for example, tetrahydrofuran, dioxane, etc.), an ester (for example, ethyl acetate, etc.), a chlorinated hydrocarbon (for example, methylene chloride, chloroform, etc.), an amide (for example, dimethylformamide, dimethylacetamide, etc.), a sulfoxide (for example, dimethyl sulfoxide, etc.), a nitrile (for example, acetonitrile, etc.), and a mixture thereof.

Further, an organic solvent, which is used for dissolving an oleophilic polymer coupler in the case where the oleophilic polymer coupler is dispersed in a latex form in an aqueous gelatin solution, is removed from the mixture before coating of the dispersion solution or by vaporization during drying of the dispersion solution coated. Although the latter is less preferable. With respect to removing the solvent, a method in which the solvent is removed by washing a gelatin noodle with water is applied when the solvent is water-soluble to some extent, or a spray drying method, a vacuum purging method or a steam purging method can be employed for removing the solvent.

Examples of the organic solvents which can be removed include, for example, an ester (for example, a lower alkyl ester, etc.), a lower alkyl ether, a ketone, a halogenated hydrocarbon (for example, methylene chloride, trichloroethylene, a fluorinated hydrocarbon, etc.), an alcohol (for example, an alcohol between n-butyl alcohol and octyl alcohol, etc.), and a mixture thereof.

Any type of dispersing agent can be used in the dispersion of the oleophilic polymer coupler. Ionic surface active agents, and particularly anionic surface active agents, are preferred. Amphoteric surface active agents such as C-cetyl betaine, an N-alkylaminopropionate, an N-alkyliminodipropionate, etc., can also be used.

On the other hand, emulsion polymerization of solid water-insoluble monomer couplers is usually carried out in an aqueous system or a water/organic solvent system. Organic solvents which can be used are preferably those which are substantially inert to solid water-insoluble monomer couplers to be used, do not interrupt usual actions in free radical addition polymerization, and have a low boiling point so as to be capable of being easily removed from an aqueous reaction medium by distillation during and/or after polymerization, same as the organic solvents described above. Preferred examples include a lower alcohol having from 1 to 4 carbon atoms (for example, methanol, ethanol, isopropanol, etc.), a ketone (for example, acetone, etc.), a chlorinated hydrocarbon (for example, chloroform, etc.), an aromatic hydrocarbon (for example, benzene, etc.), a cyclic ether (for example, tetrahydrofuran, etc.), an ester (for example, ethyl acetate, etc.), a nitrile (for example, acetonitrile, etc.), and the like.

As an emulsifier which can be used in the emulsion polymerization, a compound having surface activity is used. Preferred examples include soap, a sulfonate, a sulfate, a cationic compound, an amphoteric compound and a high molecular weight protective colloid. Specific examples and functions of the emulsifiers are described in Belgische Chemische Industrie, Vol. 28, pages 16 to 20 (1963).

In order to improve the dispersion stability, to improve the color forming property of a polymer coupler dispersed, to control the color hue of a dye formed from a polymer coupler and the oxidation product of an aromatic primary amine developing agent and to improve the bending property of the emulsion coated, a permanent solvent, that is, a water-immiscible organic solvent having a high boiling point (i.e., above 200.degree. C.), may be added in a small amount. The concentration of the permanent solvent must be at such a low level that the copolymer is plasticized while it is maintained in solid particle form. Furthermore, it is desirable to use the permanent solvent in a relatively low concentration in order to reduce the thickness of a final emulsion layer as much as possible to obtain good sharpness.

It is desirable that a proportion of the color forming portion corresponding to the general formula (I) in the cyan polymer coupler latex is usually from 5 to 80% by weight. Particularly, a proportion from 20 to 70% by weight is preferred in view of color reproducibility, color forming property and stability. Also, it is desirable that a proportion of the portion corresponding to the general formula (II) in the cyan polymer coupler latex is usually from 5 to 90% by weight. Particularly, a proportion from 10 to 70% by weight is preferred in view of color reproducibility, color forming property and fastness. Further, it is preferred that the proportion of the portion corresponding to the general formula (II) is from 30 to 200% by mole based on the proportion of the color forming portion corresponding to the general formula (I). In this case, an equivalent molecular weight, that is, the gram number of the polymer containing 1 mole of the monomer coupler is from about 250 to 4,000, but it is not limited thereto.

Specific examples of monomer couplers suitable for preparing the cyan polymer coupler latex according to the present invention are described in various literature references, for example, U.S. Pat. Nos. 2,976,294, 3,767,412, 4,080,211 and 4,128,427, Research Disclosure, Vol. 217, No. 21728, etc.

Representative examples of the monomer couplers corresponding to the general formula (Ia) which can be used in the present invention are set forth below, but the present invention is not to be construed as being limited thereto. ##STR8##

Examples of the 2-(2'-hydroxyphenyl)benzotriazole monomer corresponding to the general formula (II) are described, for example, in British Pat. No. 1,346,764, etc. Specific examples thereof are set forth below, but the present invention is not to be construed as being limited thereto. ##STR9##

In the following, typical synthesis examples of the cyan polymer coupler latexes according to the present invention are set forth.

A mixture composed of 30 g of Monomer Coupler (1), 30 g of 2-(2'-hydroxyphenyl)benzotriazole Monomer (ii), 40 g of methyl acrylate and 500 ml of dioxane was heated to 80.degree. C. with stirring while introducing nitrogen gas. To the mixture was added 20 ml of a dioxane containing 1.5 g of dimethyl azobisisobutyrate dissolved to initiate polymerization. After reacting for 5 hours, the reaction solution was cooled and poured into 3 liters of water. The solid thus deposited were collected by filtration and thoroughly washed with water. By drying the solid under a reduced pressure with heating, 95.2 g of Oleophilic Polymer Coupler (I) was obtained. It was found that the oleophilic polymer coupler contained 32.7% of Monomer Coupler (1) in the copolymer synthesized as the result of chlorine analysis.

A method for dispersing Oleophilic Polymer Coupler (I) in an aqueous gelatin solution in the form of a latex is described in the following.

Two solutions (a) and (b) were prepared in the following manner.

Solution (a): 200 g of a 30% by weight aqueous solution of bone gelatin (pH of 5.6 at 35.degree. C.) was heated to 38.degree. C. and to which was added 16 ml of a 10% by weight aqueous solution of sodium lauryl sulfate.

Solution (b): 20 g of Oleophilic Polymer Coupler (I) described above was dissolved in 200 ml of ethyl acetate at 38.degree. C.

Solution (b) was put into a mixer with explosion preventing equipment while stirring at a high speed to which was rapidly added solution (a). After stirring for 1 minute, the mixer was stopped and ethyl acetate was removed by distillation under a reduced pressure. Thus, the oleophilic polymer coupler was dispersed in a diluted gelatin solution to prepare Polymer Coupler Latex (I').

A mixture composed of 20 g of Monomer Coupler (2), 10 g of 2-(2'-hydroxyphenyl)benzotriazole Monomer (v), 20 g of butyl acrylate and 250 ml of dioxane was heated to 80.degree. C. with stirring while introducing nitrogen gas. To the mixture was added 10 ml of dioxane containing 0.5 g of dimethyl azobisisobutyrate dissolved to initiate polymerization. After reacting for 5 hours, the reaction solution was cooled and poured into 1.5 liters of water. The solid thus deposited was collected by filtration and thoroughly washed with water. By drying the solid under a reduced pressure with heating, 46.5 g of Oleophilic Polymer Coupler (II) was obtained. It was found that the oleophilic polymer coupler contained 40.8% of Monomer Coupler (2) in the copolymer synthesized as the result of chlorine analysis.

A method for dispersing Oleophilic Polymer Coupler (II) in an aqueous gelatin solution in the form of a latex is described in the following.

Two solutions (a) and (b) were prepared in the following manner.

Solution (a): 200 g of a 30% by weight aqueous solution of bone gelatin (pH of 5.6 at 35.degree. C.) was heated to 38.degree. C. and to which was added 16 ml of a 10% by weight aqueous solution of sodium lauryl sulfate.

Solution (b): 20 g of Oleophilic Polymer Coupler (II) described above was dissolved in 200 ml of ethyl acetate at 38.degree. C.

Solution (b) was put into a mixer with explosion preventing equipment while stirring at high speed and to which was rapidly added solution (a). After stirring for 1 minute, the mixer was stopped and ethyl acetate was removed by distillation under a reduced pressure. Thus, the oleophilic polymer coupler was dispersed in a diluted gelatin solution to prepare Polymer Coupler Latex (II').

A mixture composed of 20 g of Monomer Coupler (9), 10 g of 2-(2'-hydroxyphenyl)benzotriazole Monomer (vii), 45 g of methyl acrylate and 400 ml of dioxane was heated to 85.degree. C. with stirring while introducing nitrogen gas. To the mixture was added 20 ml of dioxane containing 1 g of azobisisobutyronitrile dissolved to initiate polymerization. After reacting for 4 hours, the reaction temperature was raised to 100.degree. C. and the mixture was further reacted for 2 hours. The reaction solution was cooled and poured into 3 liters of water and the solid thus deposited was collected by filtration. By drying the solid under a reduced pressure with heating, 69.8 g of Oleophilic Polymer Coupler (III) was obtained. It was found that the oleophilic polymer coupler contained 28.5% of Monomer Coupler (9) in the copolymer synthesized as the result of chlorine analysis.

A method for dispersing Oleophilic Polymer Coupler (III) in an aqueous gelatin solution in the form of a latex is described in the following.

Two solutions (a) and (b) were prepared in the following manner.

Solution (a): 200 g of a 30% by weight aqueous solution of bone gelatin (pH of 5.6 at 35.degree. C.) was heated to 38.degree. C. and to which was added 16 ml of a 10% by weight aqueous solution of sodium lauryl sulfate.

Solution (b): 20 g of Oleophilic Polymer Coupler (III) described above was dissolved in 200 ml of ethyl acetate at 38.degree. C.

Solution (b) was put into a mixer with explosion preventing equipment while stirring at high speed and to which was rapidly added solution (a). After stirring for 1 minute, the mixer was stopped and ethyl acetate was removed by distillation under a reduced pressure. Thus, the oleophilic polymer coupler was dispersed in a diluted gelatin solution to prepare Polymer Coupler Latex (III').

Using the above-described monomer couplers and the 2-(2'-hydroxyphenyl)benzotriazole monomers, Oleophilic Polymer Couplers (IV) to (XXV) described below were prepared in the same manner as described for the copolymers in Synthesis Examples 1 to 3.

The amounts of the monomer couplers, the 2-(2'-hydroxyphenyl)benzotriazole monomers and the non-color forming monomers in the above table indicate amounts used in the synthesis of the oleophilic polymer couplers.

Dispersion of these oleophilic polymer couplers in the form of a latex can be carried out in the same manner as described in Synthesis Examples 1 to 3.

1.5 liters of an aqueous solution containing 4 g of oleyl methyl tauride dissolved was heated to 85.degree. C. with stirring while introducing nitrogen gas in a 3 liter flask. To the aqueous solution was added 40 ml of a 2% aqueous solution of potassium persulfate and then was added dropwise over a period of 20 minutes a solution prepared by dissolving with heating 20 g of Monomer Coupler (1), 20 g of 2-(2'-hydroxyphenyl)benzotriazole Monomer (ii) and 40 g of methyl acrylate in 500 ml of methanol. After reacting for 1 hour, 10 ml of a 2% aqueous solution of potassium persulfate was added. After further reacting for 1 hour, the methanol was distilled off. The latex thus formed was cooled, pH of which was adjusted to 6.0 with a 1N sodium hydroxide solution and filtered. The concentration of the polymer in the latex formed was 5.3% and it was found that the polymer contained 26.0% of Monomer Coupler (1) as the result of chlorine analysis.

600 ml of an aqueous solution containing 3.3 g of oleyl methyl tauride dissolved was heated to 80.degree. C. with stirring while introducing nitrogen gas in a 1 liter flask. To the aqueous solution were added 3 ml of a 2% aqueous solution of potassium persulfate and 6 g of methyl acrylate. After 1 hour, 20 g of Monomer Coupler (2), 10 g of 2-(2'-hydroxyphenyl)benzotriazole Monomer (vii), 30 g of methyl acrylate and 250 ml of methanol were added and then 20 ml of a 2% aqueous solution of potassium persulfate was added. After 1 hour, 8 ml of a 2% aqueous solution of potassium persulfate was added. After further reacting for 1 hour, the methyl acrylate not reacted and the methanol were distilled off. The latex thus formed was cooled, pH of which was adjusted to 6.0 with a 1N sodium hydroxide solution and filtered. The concentration of the polymer in the latex formed was 11.9% and it was found that the polymer contained 31.2% of Monomer Coupler (2) as the result of chlorine analysis.

Using the above-described monomer couplers, and the 2-(2'-hydroxyphenyl)benzotriazole monomers, Polymer Coupler Latexes (C) to (L) described below were prepared in the same manner as described for the copolymer in Synthesis Example 26.

The amounts of the monomer couplers, the 2-(2'-hydroxyphenyl)benzotriazole monomers and the non-color forming monomers in the above table indicate amounts used in the synthesis of the polymer coupler latexes.

The cyan polymer coupler latexes according to the present invention can be used individually or as mixtures of two or more thereof.

Tye cyan polymer coupler latexes according to the present invention can also be used together with a cyan polymer coupler latex, such as those described in U.S. Pat. No. 4,080,211, West German Pat. No. 2,725,591, U.S. Pat. No. 3,926,436 and Research Disclosure, No. 21728, etc.

Further, a dispersion which is prepared by dispersing a hydrophobic cyan color forming coupler such as a phenol coupler or a naphthol coupler, for example, a cyan coupler, as described in U.S. Pat. Nos. 2,369,929, 2,434,272, 2,474,293, 2,521,908, 2,895,826, 3,034,892, 3,311,476, 3,458,315, 3,476,563, 3,583,971, 3,591,383, 3,767,411 and 4,004,929, West German Patent Application (OLS) Nos. 2,414,830 and 2,454,329, Japanese Patent Application (OPI) Nos. 59838/73, 26034/76, 5055/73, 146828/76 and 73050/80 (the term "OPI" as used herein refers to a "published unexamined Japanese patent application"), etc., in a hydrophilic colloid in a manner as described, for example, in U.S. Pat. Nos. 2,269,158, 2,272,191, 2,304,940, 2,311,020, 2,322,027, 2,360,289, 2,772,163, 2,801,170, 2,801,171 and 3,619,195, British Pat. No. 1,151,590, West German Pat. No. 1,143,707, etc., is loaded into the cyan polymer coupler latex according to the present invention in a manner as described in Japanese Patent Publication No. 39853/76, etc., and the resulting latex can be used. The term "load" used herein refers to the state in which a hydrophobic cyan coupler is incorporated into the interior of a cyan polymer coupler latex, or a state in which a hydrophobic cyan coupler is deposited on the surface of a cyan polymer coupler latex. However, the mechanism by which the load occurs is not accurately known.

In order to satisfy the characteristics required for the photographic light-sensitive material, a dispersion which is prepared by dispersing a development inhibitor releasing (DIR) coupler as described, for example, in U.S. Pat. Nos. 3,148,062, 3,227,554, 3,733,201, 3,617,291, 3,703,375, 3,615,506, 3,265,506, 3,620,745, 3,632,345, 3,869,291, 3,642,485, 3,770,436 and 3,808,945, British Pat. Nos. 1,201,110 and 1,236,767, etc., in a hydrophilic colloid in a manner as described in U.S. Pat. Nos. 2,269,158, 2,272,191, 2,304,940, 2,311,020, 2,322,027, 2,360,289, 2,772,163, 2,801,170, 2,801,171 and 3,619,195, British Pat. No. 1,151,590, West German Pat. No. 1,143,707, etc., is loaded into the cyan polymer coupler latex according to the present invention in a manner as described in Japanese Patent Publication No. 39853/76.

Futthermore, the cyan polymer coupler latex according to the present invention can be used together with a DIR compound as described, for example, in West German Patent Application (OLS) Nos. 2,529,350, 2,448,063 and 2,610,546, U.S. Pat. Nos. 3,928,041, 3,958,993, 3,961,959, 4,049,455, 4,052,213, 3,379,529, 3,043,690, 3,364,022, 3,297,445 and 3,287,129.

Moreover, the cyan polymer coupler latex according to the present invention can be used in combination with a competing coupler as described, for example, in U.S. Pat. Nos. 3,876,428, 3,580,722, 2,998,314, 2,808,329, 2,742,832 and 2,689,793, etc., a stain preventing agent as described, for example, in U.S. Pat. Nos. 2,336,327, 2,728,659, 2,336,327, 2,403,721, 2,701,197 and 3,700,453, etc., a dye image stabilizing agent as described, for example, in British Pat. No. 1,326,889, U.S. Pat. Nos. 3,432,300, 3,698,909, 3,574,627, 3,573,050 and 3,764,337, etc., or the like.

The color photographic light-sensitive material produced according to the present invention can also contain conventionally well known coupler(s) other than a cyan color forming coupler. A non-diffusible coupler which contains a hydrophobic group, called a ballast group, in the molecule thereof is preferred as a coupler. A coupler can have either a 4-equivalent or a 2-equivalent property with respect to the silver ion. In addition, a colored coupler providing a color correction effect, or a coupler which releases a development inhibitor upon a development can also be present therein. Furthermore, a coupler which provides a colorless product upon coupling can be employed.

A known open chain ketomethylene type coupler can be used as a yellow color forming coupler. Of these couplers, benzoylacetanilide type and pivaloylacetanilide type compounds are especially effective. Specific examples of yellow color forming couplers which can be employed are described, for example, in U.S. Pat. Nos. 2,875,057, 3,265,506, 3,408,194, 3,551,155, 3,582,322, 3,725,072 and 3,891,445, West German Pat. No. 1,547,868, West German Patent Application (OLS) Nos. 2,219,917, 2,261,361 and 2,414,006, British Pat. No. 1,425,020, Japanese Patent Publication No. 10783/76, Japanese Patent Application (OPI) Nos. 26133/72, 73147/73, 102636/76, 6341/75, 123342/75, 130442/75, 21827/76 and 87650/75, etc.

A 5-pyrazolone coupler, a pyrazolobenzimidazole coupler, a cyanoacetylcumaron coupler, an open chain acylacetonitrile coupler, etc., can be used as a magenta color forming coupler. Specific examples of magenta color forming couplers which can be employed are described, for example, in U.S. Pat. Nos. 2,600,788, 2,983,608, 3,062,653, 3,127,269, 3,311,476, 3,419,391, 3,519,429, 3,558,319, 3,582,322, 3,615,506, 3,834,908 and 3,891,445, West German Pat. No. 1,810,464, West German Patent Application (OLS) Nos. 2,408,665, 2,417,945, 2,418,959 and 2,424,467, Japanese Patent Publication No. 6031/65, Japanese Patent Application (OPI) Nos. 20826/76, 58922/77, 129538/74, 74027/74, 159336/75, 42121/77, 74028/74, 60233/75, 26541/76 and 55122/78, etc.

Two or more kinds of the couplers described above can be incorporated into the same layer, or the same coupler compound can also be present in two or more layers.

A known method, for example, the method described in U.S. Pat. No. 2,322,027, can be used in order to incorporate the couplers described above into a silver halide emulsion layer. The coupler is dispersed in a hydrophilic colloid and then mixed with a silver halide emulsion. For example, the coupler may be dissolved in an organic solvent having a high boiling point, for example, a phthalic acid alkyl ester (e.g., dibutyl phthalate, dioctyl phthalate, etc.), a phosphoric acid ester (e.g., diphenyl phosphate, triphenyl phosphate, tricresyl phosphate, dioctylbutyl phosphate, etc.), a citric acid ester (e.g., tributyl acetylcitrate, etc.), a benzoic acid ester (e.g., octyl benzoate, etc.), an alkylamide (e.g., diethyl laurylamide, etc.), a fatty acid ester (e.g., dibutoxyethyl succinate, dioctyl azelate, etc.), a trimesic acid ester (e.g., tributyl trimesate, etc.), etc., or in an organic solvent having a low boiling point of from about 30.degree. to about 150.degree. C., for example, a lower alkyl acetate (e.g., ethyl acetate, butyl acetate, etc.), ethyl propionate, sec-butyl alcohol, methyl isobutyl ketone, .beta.-ethoxyethyl acetate, methyl Cellosolve acetate, etc., and then the solution is dispersed in a hydrophilic colloid. The abovedescribed organic solvent having a high boiling point and the above-described organic solvent having a low boiling point may be used as mixture, if desired.

Furthermore, the dispersing method using a polymeric material as described in Japanese Patent Publication No. 39853/76 and Japanese Patent Application (OPI) No. 59943/76 can also be used.

When a coupler having an acid group, such as a carboxylic acid group, a sulfonic acid group, etc., is used, it can be incorporated in a hydrophilic colloid as an alkaline aqueous solution thereof.

The silver halide emulsions which can be used in the present invention are those wherein silver chloride, silver bromide, or a mixed silver halide such as silver chlorobromide, silver iodobromide, or silver chloroiodobromide is finely dispersed in a hydrophilic polymer such as gelatin. The silver halide can be chosen depending on the intended use of the photographic light-sensitive material from dispersions having a uniform grain size or those having a wide grain size distribution or from dispersions having an average grain size of from about 0.1 micron to 3 microns. These silver halide emulsions can be prepared, for example, by a single jet method, by a double jet method or a controlled double jet method, or by a ripening method such as an ammonia method, a neutral method, or an acid method. Also, these silver halide emulsions can be subjected to chemical sensitization such as a sulfur sensitization, a gold sensitization, a reduction sensitization, etc., and can contain a speed increasing agent such as a polyoxyethylene compound, an onium compound, etc. Further, a silver halide emulsion of the type wherein latent images are predominantly formed on the surface of the grains or of the type where latent images are predominantly formed inside the grains can be used in the present invention. Also, two or more kinds of silver halide photographic emulsions prepared separately and then mixed can be employed.

Suitable examples of a hydrophilic high molecular weight substance composed of the photographic light-sensitive layer of the present invention include a protein such as gelatin, etc., a high molecular weight non-electrolyte such as polyvinyl alcohol, polyvinyl pyrrolidone, polyacrylamide, etc., an acidic high molecular weight substance such as an alginate, a polyacrylic acid salt, etc., a high molecular weight ampholite such as a polyacrylamide treated with the Hoffman rearrangement reaction, a copolymer of acrylic acid and N-vinylimidazole, etc., a cross-linkable polymer such as those described in U.S. Pat. No. 4,215,195, and the like. Furthermore, a dispersion of a hydrophobic high molecular weight substance such as a latex of polybutyl acrylate, etc., can be included in the continuous phase of such a hydrophilic high molecular weight substance.

The silver halide emulsion used in the present invention can be chemically sensitized, as noted above, using conventional methods. Examples of suitable chemical sensitizers include, for example, a gold compound such as a chloroaurate and gold trichloride, as described in U.S. Pat. Nos. 2,399,083, 2,540,085, 2,597,856 and 2,597,915; a salt of a noble metal, such as platinum, palladium, iridium, rhodium and ruthenium, as described in U.S. Pat. Nos. 2,448,060, 2,540,086, 2,566,245, 2,566,263 and 2,598,079; a sulfur compound capable of forming silver sulfide by reacting with a silver salt, such as those described in U.S. Pat. Nos. 1,574,944, 2,410,689, 3,189,458 and 3,501,313; a stannous salt, an amine, and other reducing compounds such as those described in U.S. Pat. Nos. 2,487,850, 2,518,698, 2,521,925, 2,521,926, 2,694,637, 2,983,610 and 3,201,254 and the like.

Various compounds can be added to the photographic emulsions used in the present invention in order to prevent a reduction of the sensitivity or a formation of fog during preparation, storage or processing. A wide variety of such compounds are known, such as a heterocyclic compound, mercury-containing compound, a mercapto compound or a metal salt, including 4-hydroxy-6-methyl-1,3,3a,7-tetraazaindene, 3-methylbenzothiazole and 1-phenyl-5-mercaptotetrazole, etc. Other examples of such compounds which can be used are described, for example, in U.S. Pat. Nos. 1,758,576, 2,110,178, 2,131,038, 2,173,628, 2,697,040, 2,304,962, 2,324,123, 2,349,198, 2,444,605-8, 2,566,245, 2,694,716, 2,697,099, 2,708,162, 2,728,663-5, 2,476,536, 2,824,001, 2,843,491, 2,886,437, 3,052,544, 3,137,577, 3,220,839, 3,226,231, 3,236,652, 3,251,691, 3,252,799, 3,287,135, 3,326,681, 3,420,668 and 3,622,339, British Pat. Nos. 893,428, 403,789, 1,173,609 and 1,200,188, as well as in K. Mees, The Theory of the Photographic Process, 3rd Ed. (1966) and the literature references cited therein.

The photographic emulsion used in the present invention can also contain a surface active agent individually or as a mixture thereof. These surface active agents are commonly used as a coating aid. However, in some cases they are used for the purposes of emulsion dispersion, sensitization, static prevention, adhesion prevention, etc.

The surface active agents can be classified into various groups, as follows: a natural surface active agent such as saponin, etc.; a nonionic surface active agent such as an alkylene oxide, a glycerol and a glycidol, etc.; a cationic surface active agent such as a higher alkylamine, a quaternary ammonium salt, a heterocyclic compound such as pyridine and the like, a phosphoniums, a sulfoniums, etc.; an anionic surface active agent containing an acid group such as a carboxylic acid group, a sulfonic acid group, a phosphoric acid group, a sulfuric acid ester group, a phosphoric acid ester group, etc.; an amphoteric surface active agent such as an amino acid, an aminosulfonic acid, an aminoalcohol sulfuric acid ester, an aminoalcohol phosphoric acid ester, etc. Some examples of those surface active agents which can be used are described in U.S. Pat. Nos. 2,271,623, 2,240,472, 2,288,226, 2,739,891, 3,068,101, 3,158,484, 3,201,253, 3,210,191, 3,294,540, 3,415,649, 3,441,413, 3,442,654, 3,475,174, 3,545,974, West German Patent Application (OLS) No. 1,942,665, British Pat. Nos. 1,077,317 and 1,198,450, as well as Ryohei Oda et al., Kaimenkasseizai no Gosei to Sono Oyo (Synthesis and Application of Surface Active Agents), Maki Shoten (1964), A. W. Perry, Surface Active Agents, Interscience Publications, Inc. (1958) and J. P. Sisley, Encyclopedia of Surface Active Agents, Vol. II, Chemical Publishing Co. (1964), etc.

The photographic emulsion can be spectrally sensitized, or supersensitized, using a cyanine-type dye, such as a cyanine, merocyanine, carbocyanine, etc., individually, in combination, or in combination with a styryl dye.

These spectral sensitization techniques are well known, and are described, for example, in U.S. Pat. Nos. 2,688,545, 2,912,329, 3,397,060, 3,615,635 and 3,628,964, British Pat. Nos. 1,195,302, 1,242,588 and 1,293,862, West German Patent Application (OLS) Nos. 2,030,326 and 2,121,780, Japanese Patent Publication Nos. 4936/68 and 14030/69, etc. The sensitizers can be selected as desired depending on the wavelength range, sensitivity, etc., due to the purpose and use of the photographic light-sensitive material to be sensitized.

The hydrophilic colloid layer, and in particular, a gelatin layer in the photographic light-sensitive material used in the present invention, can be hardened using various kinds of cross-linking agents. For instance, an inorganic compound such as a chromium salt, a zirconium salt, etc., or an aldehyde type cross-linking agent such as mucochloric acid, or 2-phenoxy-3-chloromalealdehydic acid as described in Japanese Patent Publication No. 1872/71 can be effectively used in the present invention. However, a non-aldehyde type cross-linking agent such as a compond having plural epoxy rings as described in Japanese Patent Publication No. 7133/59, a poly(1-aziridinyl) compound as described in Japanese Patent Publication No. 8790/62, an active halogen compound as described in U.S. Pat. Nos. 3,362,827 and 3,325,287, a vinyl sulfone compound as described in U.S. Pat. Nos. 2,994,611 and 3,582,322, Belgian Pat. No. 686,440, etc., are particularly suitable for use in the photographic light-sensitive material of the present invention.

The silver halide photographic emulsion according to the present invention is suitably applied to a support. Illustrative supports include a rigid material such as glass, a metal and a ceramic, and a flexible material and the type of support chosen depends on the end-use objects. Typical examples of flexible supports include a cellulose nitrate film, a cellulose acetate film, a polyvinyl acetal film, a polystyrene film, a polyethylene terephthalate film, a polycarbonate film and a laminate thereof, a baryta coated paper, a paper coated with an .alpha.-olefin polymer, such as polyethylene, polypropylene and an ethylene-butene copolymer, a plastic film having a roughened surface as described in Japanese Patent Publication No. 19068/72, and the like. Depending upon the end-use objects of the photographic light-sensitive material, the support can be transparent, colored by adding a dye or pigment, opaque by adding, for example, titanium white, or light-shielding by adding, for example, carbon black.

The layer of the photographic light-sensitive material can be coated on a support using various coating methods, including a dip coating method, an air-knife coating method, a curtain coating method, an extrusion coating method using a hopper as described in U.S. Pat. No. 2,681,294. Also, two or more layers can be coated simultaneously, using methods as described in U.S. Pat. Nos. 2,761,791, 3,508,947, 2,941,898, 3,526,528, etc.

In practice of the present invention, a known fade-preventing agent can be used. A color image stabilizing agent can be used alone individually or in combination two or more thereof. Examples of known fade-preventing agents include a hydroquinone derivative, a gallic acid derivative, a p-alkoxyphenol, a p-oxyphenol derivative or a biphenol, etc.

Specific examples of hydroquinone derivatives are described in U.S. Pat. Nos. 2,360,290, 2,418,613, 2,675,314, 2,701,197, 2,704,713, 2,728,659, 2,732,300, 2,735,765, 2,710,801 and 2,816,028, British Pat. No. 1,363,921, etc. Specific examples of gallic acid derivatives are described in U.S. Pat. Nos. 3,457,079 and 3,069,262, etc. Specific examples of p-alkoxyphenols are described in U.S. Pat. Nos. 2,735,765 and 3,698,909, Japanese Patent Publication Nos. 20977/74 and 6623/77, etc. Specific examples of p-oxyphenol derivatives are described in U.S. Pat. Nos. 3,432,300, 3,573,050, 3,574,627 and 3,764,337, Japanese Patent Application (OPI) Nos. 35633/77, 147434/77 and 152225/77, etc. Specific examples of bisphenols are described in U.S. Pat. No. 3,700,455.

The photographic light-sensitive material of the present invention may contain an ultraviolet light absorbing agent in a hydrophilic colloid layer. For example, a benzotriazole compound substituted with an aryl group (for example, those described in U.S. Pat. No. 3,533,794), a 4-thiazolidone compound (for example, those described in U.S. Pat. Nos. 3,314,794 and 3,352,681), a benzophenone compound (for example, those described in Japanese Patent Application (OPI) No. 2784/71), a cinnamic ester compound (for example, those described in U.S. Pat. Nos. 3,705,805 and 3,707,375), and a benzoxazole compound (for example, those described in U.S. Pat. No. 3,499,762) can be employed. An ultraviolet light absorbing coupler (for example, .alpha.-naphthol type cyan dye forming coupler) and an ultraviolet light absorbing polymer can also be employed. These ultraviolet light absorbing agents may be mordanted to a specific layer. Also, these ultraviolet light absorbing agents may be contained within the layer containing the cyan polymer coupler of the present invention.

The present invention is applicable to not only the so-called multilayer type photographic light-sensitive material comprising a support having super-imposed thereon emulsion layers, each of which is sensitive to radiation of a substantially different wavelength region and forms color images of a substantially different hue, but also the so-called mixed packet type photographic light-sensitive material comprising a support having coated thereon a layer containing packets which are sensitive to radiation of substantially different wavelength regions and form color images of a substantially different hue. The present invention can be applied to a color negative film, a color positive film, a color reversal film, a color printing paper, a color reversal printing paper, and the like.

The color photographic light-sensitive material of the present invention is, after exposure, subjected to a development processing to form dye images. Development processing includes basically a color development step, a bleaching step and a fixing step. Each step can be carried out individually or two or more steps can be combined as one step where a processing solution having two or more functions is used. Also, each step can be separated into two or more steps. The development processing can further include a pre-hardening step, a neutralization step, a first development (black-and-white development) step, a stabilizing step, a water washing step, and the like, if desired. The temperature of processing can be varied depending on the photographic light-sensitive material, the processing method, and the like. In general, the processing steps are carried out at a temperature from 18.degree. C. to 60.degree. C. These steps need not necessarily be conducted at the same temperature.

A color developer solution is an alkaline solution having a pH of more than 8, preferably from 9 to 12, and containing, as a developing agent, a compound whose oxidation product is capable of forming a colored compound when reacted with a color forming agent, i.e., a color coupler. The developing agent described above include a compound capable of developing an exposed silver halide and having a primary amino group on an aromatic ring, and a precursor which forms such compound. Typical examples of preferred developing agents are, for example, 4-amino-N,N-diethylaniline, 3-methyl-4-amino-N,N-diethylaniline, 4-amino-N-ethyl-N-.beta.-hydroxyethylaniline, 3-methyl-4-amino-N-ethyl-N-.beta.-hydroxyethylaniline, 4-amino-3-methyl-N-ethyl-N-.beta.-methanesulfonamidoethylaniline, 4-amino-N,N-dimethylaniline, 4-amino-3-methoxy-N,N-diethylaniline, 4-amino-3-methyl-N-ethyl-N-.beta.-ethoxyethylaniline, 4-amino-3-methoxy-N-ethyl-N-.beta.-methoxyethylaniline, 4-amino-3-.beta.-methanesulfonamidoethyl-N,N-diethylaniline, and a salt thereof (for example, a sulfate, a hydrochloride, a sulfite, a p-toluene sulfonate, and the like). Other developing agents such as those described in U.S. Pat. Nos. 2,193,015 and 2,592,364, Japanese Patent Application (OPI) No. 64933/73, L. F. A. Mason, Photographic Processing Chemistry, pages 226-229, Focal Press, London (1966), T. H. James, The Theory of the Photographic Process, 4th Edition, pages 315-320, Macmillan, New York (1977), etc., can be used. Further, an aminophenol as described in T. H. James, The Theory of the Photographic Process, 4th Edition, pages 311-315, etc., can be used. Also, a 3-pyrazolidone developing agent can be used together with these developing agents.

The color developing solution can optionally contain various additives. Typical examples of such additives include an alkaline agent (for example, an alkali metal or ammonium hydroxide, carbonate or phosphate, etc.); a pH adjusting agent or buffer (for example, a weak acid such as acetic acid, boric acid, etc., a weak base, or salt thereof, etc.); a developing accelerator (for example, various pyridinium compounds or cationic compounds such as those described in U.S. Pat. Nos. 2,648,604 and 3,671,247; potassium nitrate; sodium nitrate; a condensation product of polyethylene glycol, and a derivative thereof such as those described in U.S. Pat. Nos. 2,533,990, 2,577,127 and 2,950,970; a nonionic compound such as a polythioether represented by those described in British Pat. Nos. 1,020,033 and 1,020,032; a polymeric compound having a sulfite ester group such as those described in U.S. Pat. No. 3,068,097; an organic amine such as pyridine and ethanolamine; benzyl alcohol; a hydrazine and the like); an antifogging agent (for example, an alkali metal bromide; an alkali metal iodide; a nitrobenzimidazole such as those described in U.S. Pat. Nos. 2,496,940 and 2,656,271; mercaptobenzimidazole; 5-methylbenzotriazole; 1-phenyl-5-mercaptotetrazole; a compound for use in rapid processing such as those described in U.S. Pat. Nos. 3,113,864, 3,342,596, 3,295,976, 3,615,522 and 3,597,199; a thiosulfonyl compound such as those described in British Pat. No. 972,211; a phenazine-N-oxide such as those described in Japanese Patent Publication No. 41675/71; fog inhibiting agents described in Kagaku Shashin Binran (Manual of Scientific Photography), Vol. II, pages 29-47, and the like); a stain or sludge preventing agent such as those described in U.S. Pat. Nos. 3,161,513 and 3,161,514, and British Pat. Nos. 1,030,442, 1,144,481 and 1,251,558; an interlayer-effect accelerator disclosed in U.S. Pat. No. 3,536,487; a preservative (for example, a sulfite, a bisulfite, hydroxyamine hydrochloride, formsulfite, an alkanolaminesulfite adduct, etc.) and the like.

The color photographic light-sensitive material of the present invention can be treated with various solutions prior to color development.

In the case of color reversal films, treatment with a first development solution is also carried out prior to the color development. As the first development solution, an alkaline aqueous solution containing at least one developing agent, such as hydroquinone, 1-phenyl-3-pyrazolidone, N-methyl-p-aminophenol and the like can be employed. The solution can also contain an inorganic salt such as sodium sulfate, etc.; a pH adjusting agent or buffer such as borax, boric acid, sodium hydroxide and sodium carbonate, etc.; a development fog preventing agent such as an alkali metal halide (such as potassium bromide, etc.), and the like.

The additives illustrated above and the amounts thereof employed are well known in the color processing field.

After color development, the color photographic materials are usually bleached and fixed. The process can be effected in a blix bath which combines the bleaching and fixing steps. Various known compounds can be used as a bleaching agent, for example, a ferricyanide, a dichromate; a water-soluble iron (III) salt, a water-soluble cobalt (III) salt; a water-soluble copper (II) salt; a water-soluble quinone; a nitrosophenol, a complex salt of a polyvalent cation such as iron (III), cobalt (III), copper (II), etc., and an organic acid, for example, a metal complex of an aminopolycarboxylic acid such as ethylenediaminetetraacetic acid, nitrilotriacetic acid, iminodiacetic acid, N-hydroxyethylethylenediaminetriacetic acid, etc., malonic acid, tartaric acid, malic acid, diglycolic acid and dithioglycolic acid, and a copper complex salt of 2,6-dipicolinic acid; a peracid such as an alkylperacid, a persulfate, a permanganate and hydrogen peroxide; hypochlorite; chlorine; bromine; bleaching powder; and the like. These can be suitably used, individually or in combination. To the bleaching solution, a bleaching accelerator such as those described in U.S. Pat. Nos. 3,042,520 and 3,241,966, Japanese Patent Publication Nos. 8506/70 and 8836/70 and various other additives can be added.

Any known fixing solution can be used for fixing the photographic material of the present invention. That is, ammonium, sodium or potassium thiosulfate can be used as a fixing agent at a concentration of about 50 to about 200 g/liter. Fixing solution can further contain a stabilizer such as a sulfite and a metabisulfite; a hardener such as potassium alum; a pH buffer such as an acetate and borate, and the like. The fixing solution generally has a pH of more than 3 or less.

Bleaching bath, fixing bath and blixing bath as described, for example, in U.S. Pat. No. 3,582,322, Japanese Patent Application (OPI) No. 101934/73, West German Pat. No. 1,051,117, etc., can also be employed.

The present invention will be explained in greater detail with reference to the following examples, but the present invention should not be construed as being limited thereto.

On a paper support both surfaces of which were laminated with polyethylene were coated on a first layer (undermost layer) to a sixth layer (uppermost layer) as shown below in order to prepare a color photographic light-sensitive material which is designated Sample 1.

In Table 1 below, a coating amount is set forth in mg/m.sup.2.

Sample 2 was prepared in the same manner as described in Sample 1 except that the ultraviolet light absorbing agent in the red-sensitive layer of Sample 1 was eliminated. Also, Samples 3 and 4 were prepared in the same manner as described in Samples 1 and 2 except that the cyan coupler solvent in Samples 1 and 2 was eliminated, respectively. Further, Samples 5 and 6 were prepared in the same manner as described in Samples 3 and 4 except that 700 mg/m.sup.2 of the oleophilic cyan polymer coupler having the structure shown below was used in the form of a latex in place of the cyan coupler in Samples 3 and 4, respectively. ##STR10## Furthermore, Samples 7, 8, 9, 10, 11, 12, 13 and 14 were prepared in the same manner as described in Sample 6 except that 700 mg/m.sup.2 of Oleophilic Cyan Polymer Couplers (I), (IV), (V), (VII), (VIII), (IX) and (XIII) in the form of a latex and 700 mg/m.sup.2 (in an amount of the polymer coupler) of Polymer Coupler Latex (A) according to the present invention were used respectively in place of the oleophilic cyan polymer coupler in Sample 6.

Each sample was exposed to red light through a continuous wedge and subjected to color development processing in the following manner.

The processing solutions used in the color development processing had the following compositions:

The color density in each sample after development processing was measured. The fog, gamma and maximum density in each sample are shown in Table 2 below.

As is apparent from the results shown in Table 2 above, Samples 7 to 14 containing the oleophilic cyan polymer coupler latexes according to the present invention have excellent color forming properties.

Further, Samples 1 to 14 after development processing were maintained in an almost dry atmosphere at 80.degree. C. for 3 weeks and then the density reduction rates of the cyan color image in the areas where the initial densities were 1.0 (D 1.0) and 2.0 (D 2.0) were measured. The results thus obtained are shown in Table 3 below.

It is apparent from the results shown in Table 3 above that the samples containing the oleophilic cyan polymer latex according to the present invention have excellent heat fastness.

Moreover, Samples 1 to 14 after development processing were subjected to the color fading test in a xenon light color fading testing equipment (1.3.times.10.sup.5 lux) for 192 hours. Then, the density reduction rates of the cyan color image in the areas where the initial densities were 1.0 (D 1.0) and 2.0 (D 2.0) and the coloring in the white area (light stain: yellow color density) were measured. The results thus obtained are shown in Table 4 below.

It is apparent from the results shown in Table 4 above that in the samples containing the oleophilic cyan polymer coupler latex according to the present invention the occurrence of light stain is remarkably prevented.

While the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof.