JPH0697331B2 - Method for preventing photo-fading of organic coloring substances - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for preventing photobleaching of an organic coloring substance.

[Background of the Invention]

It is widely known that organic coloring substances generally have a tendency to fade with light. In the field of inks, dyes of fibers, or color photography, research has been conducted to prevent the photo-fading property of such organic coloring substances.

The present invention, for the purpose of preventing photofading of such organic coloring substances,
Used extremely advantageously.

The organic coloring substance used in the present invention means a substance that appears colored to the human eye under irradiation of sunlight,
Generally, it means an organic substance having at least one absorption maximum at 300 nm to 800 nm in a methanol solution.

Also, as used herein, the term light means an electromagnetic wave of from about 300 nm to about 800 nm or less, ultraviolet light of less than about 400 nm, visible light of about 400 nm to about 700 nm, and about 700 nm to about 800 nm.
Includes nm infrared.

There have been many reports on methods for improving the light resistance of organic coloring substances such as pigments or dyes. For example, in U.S. Pat.No. 3,432,300, visible and ultraviolet light is obtained by mixing organic compounds used in color photography such as indophenol, indoaniline, azo and azomethine dyes with phenol type compounds having fused heterocyclic ring systems. It is stated that the fastness to light is improved.

In the field of silver halide color photographic light-sensitive materials, the dye image obtained from the coupler is exposed to light for a long time,
It is desirable that it does not discolor even when stored under high temperature and high humidity.

However, it is known that the fastness of these dye images, mainly to ultraviolet rays or visible rays, is not satisfactory, and that they are easily discolored when irradiated with these active rays. In order to eliminate such defects, conventionally,
A method of selecting and using various couplers with low fading property, using an ultraviolet absorber to protect the dye image from ultraviolet rays, or introducing a group imparting light resistance to the coupler has been proposed. ing.

However, for example, in order to give a satisfactory light resistance to a dye image using an ultraviolet absorber, a relatively large amount of the ultraviolet absorber is required, and in this case, the coloring of the ultraviolet absorber itself significantly contaminates the dye image. It was sometimes done. Further, even if an ultraviolet absorber is used, it does not show any effect in preventing fading of a dye image due to visible light, and there is a limit to improvement of light resistance by the ultraviolet absorber. Further, a method is known in which a dye image fading preventive agent having a phenolic hydroxyl group or a group which is hydrolyzed to form a phenolic hydroxyl group is used. And regarding these, for example, Japanese Patent Publication No. 48-3
1256, 48-31625, 51-30462, JP-A-49-13432
6 and 49-134327, phenol and bisphenols, U.S. Pat.No. 3,069,262, pyrogallol, gallic acid and its esters, U.S. Pat.Nos. 2,360,290 and 4,015,990, α-tocopherols and their acyl derivatives, JP-A-52-27534, JP-A-52-14751 and US Pat. No. 2,735,765 show hydroquinone derivatives, US Pat. Nos. 3,432,300 and 3,574,627 have 6-hydroxychromans, and US Pat. No. 3,573,050 have 5-hydroxychroman derivatives. And 6 in Japanese Patent Publication No. Sho 49-20977,
It has been proposed to use 6'-dihydroxy-2,2'-spirobichromans and the like. However, these compounds are not sufficient although they are effective as a discoloration preventing agent and a discoloration preventing agent for dyes.

Further, it is described in British Patent 1,451,000 that the stability of an effective coloring compound to light is improved by using an azomethine quenching compound whose absorption peak is bathochromic than the peak of the coloring compound. Since the azomethine quenching compound itself is colored, it greatly affects the hue of the coloring substance, which is disadvantageous. It is also possible to use metal complexes to prevent photodegradation of polymers by J. Guillory, RS Becker (JPGuillory, RSBecker), Journal of Polymer Science, Polymer Chemistry (J.Polym, Sci). ., Polym. Chem. Ed.) Volume 12, p. 993 (1
974), R.P.R.Ranawela, G.
Scott (RPRRanaweera, G.Scott), Journal ·
Of Polymer Science, Polymer Letter Edition (J.Poly
m.Sci., Polym. Lett. Ed.), Vol. 13, p. 71 (1975) and the like, and a method for stabilizing a dye with light by a metal complex is disclosed in JP-A-50-87649 and Research Disclosure No.15162 (1
976), these complexes are not very effective in fading prevention itself and their solubility in organic solvents is not high, so it is not possible to add an amount sufficient to exert a fading prevention effect. Furthermore, since these complexes have a large coloring themselves, if added in a large amount, they adversely affect the hue and purity of the organic coloring substance, especially the dye.

Further, a method of photostabilizing a dye with various metal complexes is disclosed in JP-A-54-62826, JP-A-54-62987, JP-A-54-65185, and JP-A-54-695.
No. 80, No. 54-72780, No. 54-82384, No. 54-82385,
54-82386, 54-136581, 54-136582, 55-121
No. 29, No. 55-152750, No. 56-168652, No. 56-167138
No. 57-161744, Japanese Patent Publication No. 57-19770.

However, even by the above method, it is still insufficient to reduce the coloring of the complex itself.
In particular, it is not possible to eliminate the adverse effect on the hue and purity of the pigment or dye. Further, when these publicly known metal complexes are applied to a silver halide color photographic light-sensitive material (hereinafter referred to as a color photographic material), contamination is likely to occur in the uncolored portion of the color photographic material subjected to the development processing. In particular, when the developed color photographic material is stored under the conditions of high temperature and high humidity, the generation of contamination remarkably increases.

[Object of the Invention]

It is an object of the present invention to provide a method of improving the stability of organic coloring substances to light.

Another object of the invention is to provide a method of improving the light stability of organic coloring substances, in particular dyes or dyes, without degrading the hue and the purity of these substances.

Yet another object of the present invention is to provide a method of improving the light stability of a color image forming a color photographic image without causing contamination of the undeveloped areas of the color photographic material.

[Constitution of the Invention] The above object of the present invention is to provide an organic coloring substance and the following general formula [I]:
It is achieved by coexisting with at least one kind of the compound represented by

General formula [I] In the formula, R ¹ represents a hydrogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, an acyl group, a sulfonyl group or a heterocyclic group, and R ² represents a substituent. n represents an integer of 0 to 6, and when n represents an integer of 2 or more, a plurality of R ² may be the same or different. X represents a simple bond or a methylene group.

Hereinafter, the present invention will be described more specifically.

The alkyl group represented by R ¹ in the above general formula [I] preferably has ¹ to 32 carbon atoms, and may be linear or branched.

The alkenyl group represented by R ¹ has 2 to 32 carbon atoms, and the cycloalkyl group has 3 to 12 carbon atoms, especially 5 to
7 is preferable, and the alkenyl group may be linear or branched.

A phenyl group is preferred as the aryl group.

The acyl group is an alkylcarbonyl group, an arylcarbonyl group, etc .; The sulfonyl group is an alkylsulfonyl group, an arylsulfonyl group, etc .; The heterocyclic group is preferably a 5- to 7-membered group, specifically, a 2-furyl group, 2 -Thienyl group, 2-pyrimidinyl group, 2-benzothiazolyl group and the like.

The substituent represented by R ² is not particularly limited, and typically includes a substituent represented by R ^{1. In} addition to this, a halogen atom and anilino, acylamino, sulfonamide, cycloalkenyl, alkynyl, Sulfinyl, phosphonyl, carbamoyl, sulfamoyl, cyano, alkoxy, aryloxy, heterocyclic oxy, acyloxy, carbamoyloxy, amino, alkylamino, imide, ureido, sulfamoylamino, alkoxycarbonylamino, aryloxycarbonylamino, alkoxycarbonyl, Examples also include aryloxycarbonyl groups, spiro compound residues, bridged hydrocarbon compound residues, and the like.

Examples of the acylamino group represented by R ² include an alkylcarbonylamino group and an arylcarbonylamino group.

Examples of the sulfonamide group represented by R ² include an alkylsulfonylamino group and an arylsulfonylamino group.

The cycloalkenyl group represented by R ² has 3 to 10 carbon atoms.
12, especially 5 to 7, are preferred.

Examples of the sulfinyl group include an alkylsulfinyl group, an arylsulfinyl group, and the like; a phosphonyl group, an alkylphosphonyl group, an alkoxyphosphonyl group, an aryloxyphosphonyl group, an arylphosphonyl group, and the like; a carbamoyl group, an alkylcarbamoyl group, an arylcarbamoyl group Etc .; As the sulfamoyl group, an alkylsulfamoyl group,
Arylsulfamoyl group and the like; as the acyloxy group, an alkylcarbonyloxy group,
Arylcarbonyloxy group etc .; Carbamoyloxy group as alkylcarbamoyloxy group, arylcarbamoyloxy group etc .; Ureido group as alkylureido group, arylureido group etc .; Sulfamoylamino group as alkylsulfamoylamino group, aryl Sulfamoylamino group, etc .; As the heterocyclic oxy group, those having a 5- to 7-membered heterocycle are preferable, for example, 3,4,5,6-tetrahydropyranyl-
2-oxy group, 1-phenyltetrazole-5-oxy group and the like; imide group as succinimide group, 3-heptadecyl succinimide group, phthalimide group, glutarimide group, etc .; spiro compound residue as spiro [3.3] Heptane-1
-Yl etc .; as the bridged hydrocarbon compound residue, bicyclo [2.2.1] heptan-1-yl, tricyclo [3.3.1.1 ³⁷ ] decane-
1-yl, 7,7-dimethyl-bicyclo [2.2.1] heptan-1-yl and the like can be mentioned.

When the substituents OR ¹ and R ² are adjacent to each other, OR ¹
And R ² may combine to form a 5- or 6-membered ring.

When X represents a methylene group, this methylene group may have a substituent as represented by R ² .

The compound represented by the above general formula [I] of the present invention is a chroman represented by the following general formula [Ia] or [Ib] or 2H-
It is contained in any of the chromene derivatives.

General formula (Ia) General formula (Ib) In the general formula [Ia] and [Ib], R ^1, R ² and n are respectively R ^1, R ² and n synonymous in formula (I).

In the present invention, R ^{1 of the} compound represented by the general formula [I] is
Is particularly preferably a hydrogen atom, an alkyl group or a cycloalkyl group.

Next, typical specific examples of the compound represented by the general formula [I] used in the present invention (hereinafter, referred to as the anti-fading agent of the present invention) are shown, but the present invention is not limited thereto.

Methods for synthesizing these compounds of the present invention are known, for example, Justus liebigs Ann. Chem., 1970, 733, 120-12.
4 pages, Bulletin of the Chemical Society of Japan (Bull. Chem. Soc. Jpn.), 1970, 4
Volume 3 (10), pp. 3311-3312, Indian Journal
It can be synthesized according to the method described in Indian Chemistry, 1971, Vol. 9, (1), pp. 17-19.

The amount of the compound of the present invention used is preferably 5 to 400 mol%, more preferably 10 to 300 mol%, based on the organic coloring substance used in the present invention.

Organic coloring substances used in the present invention, basic dyes, acid dyes, direct dyes, water-soluble dyes such as soluble vat dyes, mordant dyes, sulfur dyes, vat dyes, oil-soluble dyes, disperse dyes, azoic dyes, Insoluble dyes such as oxidation dyes, or dyes belonging to the class of dyeing properties such as reactive dyes are included.

These organic coloring substances have at least one absorption maximum in methanol solution from 300 nm to 800 nm, preferably from 400 nm to 700 nm.

Among these dyes, the dyes preferably used in the present invention include quinone imine dyes (such as azine dyes, oxazine dyes and thiazine dyes), methine and polymethine dyes (such as dianine dyes and azomethine dyes), azo dyes, anthraquinone dyes, indoamines and Indophenol dyes, indicoid dyes, carbonium dyes, formasan dyes, and other dyes belonging to the chemical structure classification are included.

The organic coloring substance used in the present invention is an image forming dye used in the field of photography, for example, a color coupler, a DRR compound, a DRR coupler, a dye formed from an amidrazone compound dye developing agent, a silver dye bleaching dye, and the like. Include all.

Dyes preferably used as the organic coloring substance of the present invention, anthraquinone, quinone imine, azo, methine,
Examples include polymethine, indoamine, indophenol and formazan dyes. The dyes most preferably used in the present invention are methine and polymethine dyes and indoamine and indophenol dyes. This dye includes compounds having the following groups.

In the above groups, the phenyl group represents an unsubstituted phenyl group or a substituted phenyl group, for example, an phenyl group substituted with an alkyl group, an alkoxy group, a halogen atom or an amino group.

Dye forming couplers suitable for use in the present invention include those of the yellow, magenta and cyan dye forming types. This coupler is a so-called 4 coupler as described, for example, in U.S. Pat. Nos. 3,277,155 and 3,458,315.
It may be an equivalent type or a two equivalent type in which the carbon atom at the coupling position is substituted with a substituent (split-off group) capable of leaving during the coupling reaction.

Preferred yellow dye image-forming couplers in the present invention include benzoylacetanilide type and bivaloylacetanilide type couplers, and magenta dye image-forming couplers include 5-pyrazolone type, pyrazolotriazole type, imidazopyrazole type and pyrazolopyrazole type couplers. ,
There are pyrazolotetrazole type, pyrazolinobenzimidazole type and indazolone type couplers, and cyan dye image forming couplers include phenol type, naphthol type and pyrazoloquinazolone type couplers. Specific examples of these yellow, magenta and cyan dye-forming couplers are known in the photographic art, and in the present invention,
All of these known couplers are included.

Next, typical examples of yellow couplers that can be used in the present invention will be given.

These yellow couplers are, for example, West German Published Patent No. 2,05
7941, West German published patent 2,163,812, JP-A-47-26133
No. 48, No. 48-29432, No. 50-65321, No. 51-3631, No. 51-
50734, 51-102636, 48-66835, 48-94432
No. 49-1229, 49-10736, Japanese patent 51-33410,
The compounds described in JP-A No. 52-25733 and the like can be synthesized according to the methods described therein.

Next, typical examples of magenta couplers that can be used in the present invention will be given.

These magenta couplers are described, for example, in US Pat.
4, British Patent 1,183,515, Japanese Patent Publication Nos. 40-6031, 40-60
35, 44-15754, 45-40757, 46-19032, JP-A-50-130,41, 53-129035, 51-37646, 55
-62454, U.S. Patent 3,725,067, UK Patent 1,252,418
No. 1,334,515, JP-A-59-171956, 59-162548.
No. 60-43659, No. 60-33552, Research Disclosure No.24626 (1984), Japanese Patent Application No. 59-243007, No. 5
9-243008, 59-243009, 59-243012, 60-701
It can be synthesized according to the method described in No. 97, No. 60-70198 and the like.

The cyan coupler used in the present invention is not particularly limited, but a phenol cyan coupler is preferable.

Next, typical examples of cyan couplers that can be used in the present invention will be given.

These cyan couplers are described, for example, in U.S. Pat.
No. 2,801,171, JP-A-50-112038, 50-134644
No. 53, No. 53-109630, No. 54-55380, No. 56-65134, No. 5
6-80045, 57-155538, 57-204545, 58-9873
No. 1, 59-31953 and the like, and can be synthesized according to the methods described therein.

When such couplers are used in the present invention, dyes are formed from these couplers by reaction with oxidized aromatic primary amine silver halide developers.

The above-mentioned developers include aminophenol and phenylenediamine, and these developers can be mixed and used.

Among the developers that can be combined with various couplers to form colored compounds according to the present invention, representative examples thereof are listed below.

Examples of other dyes that can be used as the coloring compound in the invention include the followings.

Further, other types of dyes preferably used in the present invention include USB351,673, U.S. Patents 3,932,381 and 3.928,3.
12, 3.931,144, 3,954,476, 3,929,760
No., No. 3,942,987, No. 3,932,380, No. 4,013,635,
4,013,635, 4,013,633, JP-A-51-113624,
51-109928, 51-104343, 52-4819, Japanese Patent Application No. 5
2-64533, Research Disclosure No. 15157 (1
976), No. 13024 (1975) and the like, and dyes formed by oxidation of DRR compounds.

Furthermore, other types of dyes used in the present invention include:
For example, British patents 840,731, 904364, 932,272,
1,014,725, 1,038,331, 1,066,352, 1,0
97,064, JP-A-51-133021, UST900,029 (USDefen
sive Publication) Dyes released by the reaction of a DDR coupler with an oxidant of a color developing agent as described in U.S. Pat. No. 3,227,550 or dyes formed by a reaction with an oxidant of a color developing agent can be mentioned. .

Other types of dyes preferably used in the present invention include Japanese Patent Publications No. 35-182, No. 18332, No. 48-32130, and No. 46-
Examples thereof include dye developing agents described in Nos. 43950 and 49-2618.

Furthermore, other dyes used in the present invention include various dyes used in the silver dye bleaching method. Examples of yellow dyes that can be used for this purpose include direct fast yellow GC (CI29000), azo dyes such as glysophenine (CI24895), indigo golden yellow IGK (CI59101), indigosol yellow 2GB (CI6
1726), Argosol Yellow GCA-CF (CI67301), Indanthrene Yellow GF (CI68420), Mikeslen Yellow GC (CI67300), Indanthrene Yellow 4GK (CI68)
405) and other benzoquinone dyes; anthraquinone dyes,
Examples thereof include polycyclic soluble vat dyes and other vat dyes. Examples of magenta dyes include azo dyes such as Sumilite Sapra Rubinol B (CI29225) and Benzo Brilliant Kelanin B (CI15080), Indigozol Brilliant Pink IR (CI73361), Indigozol Red Violet 15R (CI59321), Indigozole Red Violet. Indigoid dyes such as IRRL (CI59316), Indanthrene Red Violet RRK (CI67895), Mikeslen Brilliant Violet BBK (CI6335); soluble vat dyes consisting of benzoquinone and anthraquinone heteropolycyclic compounds, and other vat dyes A dye can be mentioned.

As a cyan dye, Direct Sky Blue 6B (CI24
410), Direct Brilliant Blue 2B (CI22610),
Azo dyes such as Sumilite Supra Blue G (CI34200), Sumilite Supra Turkeys Blue G (CI7418)
0), phthalocyanine dyes such as Michelin Brilliant Blue 4G (CI74140), Indanthrene Turkey Blues 5G (CI69845), Indanthrene Blue GCD (CI7306)
6), indigosol 04G (CI73046), anthrazole green IB (CI59826) and the like.

As mentioned above, the compounds of the present invention stabilize organic coloring substances. These compounds of the invention can be present in any or all of the emulsion layers of the color photographic material. The compounds of this invention can also be present in any of the layers contained in the non-light sensitive portions of the color transfer material. The effective methods for dispersing these compounds of the present invention are the same as those used for dispersing the coupler.

The compounds of the present invention are generally oil-soluble and are commonly described in US patents.
2,322,027, 2,801,170, 2,801,171, 2,27
According to the method described in No. 2,191 and No. 2,304,940, in a high-boiling solvent, if necessary, dissolved in combination with a low-boiling solvent,
It is preferable to disperse and add to the hydrophilic colloid solution,
At this time, a coupler, a hydroquinone derivative, an ultraviolet absorber, a known dye image fading inhibitor, or the like may be used in combination, if necessary. At this time, there is no problem even if two or more compounds of the present invention are mixed and used. If the method for adding the compound of the present invention is further described in detail, one or more of the compounds may be added to a coupler, a hydroquinone derivative, an ultraviolet absorber or a known dye image antifading agent at the same time as an organic acid. Amides, carbamates, esters, ketones, hydrocarbons and urea derivatives, etc., especially dibutyl phthalate, tricresyl phosphate, di-i-octyl azelate, dibutyl sebacate, trihexyl phosphate, decalin, N, N -The-
Ethylcaprylamide, N, N-diethyllaurylamide, a high boiling solvent such as pentadecyl phenyl ether or fluoroparaffin, ethyl acetate if necessary,
Dissolved in a low boiling point solvent such as butyl acetate, butyl propionate, cyclohexanol, cyclohexane, or tetrahydrofuran (the high boiling point solvent and the low boiling point solvent may be used alone or in combination). An anionic surfactant such as alkylnaphthalene sulfonic acid and / or an aqueous solution containing a hydrophilic binder such as gelatin containing a nonionic surfactant such as sorbitan sesquioleate and sorbitan monolaurate, and a high speed rotating mixer, It is possible to emulsify and disperse with a colloid mill or an ultrasonic dispersing device, and add the resulting dispersion to a hydrophilic colloid solution (for example, silver halide emulsion) for use.

Both the colorant and the compounds of this invention can be present in any or some of the hydrocolloid layers in the photographic element. These materials may be present in the light-sensitive element and in non-light-sensitive elements such as dye image receivers used in photographic diffusion transfer film units. When the light absorbing material and the compound of the present invention are contained in such a non-photosensitive image recording element, they are preferably mordanted. Thus, for such use, the compounds of the invention will have a molecular form such that they can be retained in the mordant layer of the image receptor so that they do not migrate away from the dye to be stabilized. Must be

There are several types that appear to be effective when the method of the present invention is used to improve the lightfastness of photographic elements such as image transfer film units.

One of its uses is in the Inhibition Transfer Film Unit as described in US Pat. No. 2,882,156.
Still another use is US Pat. Nos. 2,087,817 and 3,185,5.
67, 2,983,606, 3,253,915, 3,227,550
Issue 3,227,551, Issue 3,227,552, Issue 3,415,644,
3,415,645, 3,415,646, 3,594,164 and
3,594,165 and Belgian patents 757,959 and 757,96
A color image transfer film unit as described in No. 0.

The coloring substances used in the present invention and the compounds of the present invention are available in the Product Licensing Index.
censing Index), Volume 92 (December 1971), No. 9232, 107-1
It can be used according to the method with materials such as those described on page 10. In this regard, I, II, III, IV, V, VII, VIII, IX, X, XI, XII, XIII, XIV,
Sections XV, XVI, XVII, XVIII, and XXIII are applicable.

Any type of compound of the invention should result in the improvement of the invention, theoretically there is no upper limit to the amount that can be used.
When the present invention is applied to a photographic light-sensitive material, it is preferable that at least 1 micromol of the compound of the present invention is present per 1 m ^{2 of} the light-sensitive material, and about 10 to 1 × 10 ⁴ micromol of the present invention is present per 1 m ² . More preferably, the compound is present.

In general, the colorant density should be equal to the density normally used in color photography. These densities are well known to those skilled in color photography. Coloring agents are preferably present in an amount ranging from about 10 to 10 ⁴ micromoles per 1 m ² of the photosensitive material. Approximately 100 to 1m ^{2 of} photosensitive material
More preferably, it is present in an amount in the range of about 600 micromolar.

The coloring substance used in the present invention generally has a maximum wavelength absorption peak smaller than 800 nm in a methanol solution. The maximum wavelength absorption peak of this basic substance is 30 in methanol solution.
It is preferably in the range of 0 to 800 nm, and most preferably in the range of 400 to 700 nm.

In the photographic light-sensitive material used in the method of the present invention, the silver halide emulsion is generally a silver halide grain dispersed in a hydrophilic colloid, and as the silver halide, silver chloride, silver bromide, silver iodide, Silver chlorobromide, Iodobromide, Silver chloroiodobromide and mixtures thereof.

These silver halide emulsions can be optically sensitized with various sensitizing dyes in order to impart photosensitivity in a desired light-sensing wavelength range. Further, chemical sensitization can be carried out by a conventional method in the field of photography.

Silver halide emulsions are known in the photographic industry as antifoggants or stabilizers for the purpose of preventing fog during the manufacturing process of light-sensitive materials, storage or photographic processing, and / or keeping photographic performance stable. A compound can be added.

In addition, various photographic additives such as hardeners, plasticizers, optical brighteners, antistatic agents, coating aids, etc. can be used alone or in combination of two or more.

The color photographic material to which the present invention is applied may be an internal color photographic material containing a coupler or an external color photographic material containing a coupler in a developer.

The coupler-containing internal color photographic material is processed according to a conventional method to obtain a color image. The main steps in this case are color development, bleaching, and fixing, and steps such as washing with water and stabilization may be included if necessary. These steps can also be carried out in one bath for two or more steps such as bleach-fixing. Color development is usually performed in an alkaline solution containing an aromatic primary amine developing agent. Preferred specific examples of the aromatic primary amine developing agent are described above as exemplary developers D-1 to D-6.

When the color photographic material to which the method of the present invention is applied is a color diffusion transfer film unit, the processing of the photographic material is automatically performed inside the light-sensitive material. In this case, the developing agent is contained in the rupturable container. As the developing agent, in addition to the compounds represented by D-1 to D-6 above,
N-methylaminophenol, 1-phenyl-3-pyrazolidone, 1-phenyl-4,4-dimethyl-3-pyrazolidone, 1-phenyl-4-methyl-hydroxymethyl-3-pyrazolidone, 3-methoxy-N, N -Diethyl-
For example, p-phenylenediamine can be used.

In order to form a color image in the color photographic material used in the method of the present invention, a method using a coupling reaction between the dye-forming color coupler described above and an oxidation product of a p-phenylenediamine type color developing agent, Method using dye developing agent, method using oxidative rupturable ability of DRR compound, method using detachment reaction of dye by coupling reaction of DDR coupler, method using dye forming reaction by coupling reaction of DDR coupler or silver dye bleaching method A known method such as a method using can be used.

Therefore, when the method of the present invention is applied to a photographic light-sensitive material, various color photographic light-sensitive materials such as color positive films, color papers, color negative films, color reversal films, color diffusion transfer film units, and silver dye bleaching light-sensitive materials. Is mentioned.

〔Example〕

Hereinafter, the present invention will be described with reference to examples, but the embodiments of the present invention are not limited thereto.

Example 1 Magenta dye having the following structure (absorption maximum in methanol solution: 538 nm) 0.7 g of tricresyl phosphate 4 ml and ethyl acetate 8
12 ml of 10% gelatin solution containing 2 ml of 0.5% sodium dodecylbenzenesulfonate aqueous solution.
Emulsified and dispersed.

Next, this emulsified dispersion was mixed with 30 ml of a 5% gelatin solution and applied on a paper support laminated on both sides with polyethylene to obtain a sample. This sample is No. 1.

When the above-mentioned emulsified dispersion liquid was prepared by the same method, the comparative compounds represented by the following structural formulas (a) and (b) were each added to the following formula:
Add 4 g and apply in the same manner as Sample No. 1 above to apply Sample No. 2
And No.3 were created.

Also, when making the emulsion dispersion by the method of the sample No. 1,
As shown in Table 1, 0.4 g each of the exemplary compounds of the present invention
Each of them was added and applied in the same manner as the above sample No. 1 to prepare 12 kinds of samples (No. 4 to 15).

Comparative compound (a) ... Metal complex described in JP-A-55-12129 Comparative compound (b) ... Same as above Each of the above samples was exposed to a xenon fade meter for 7 days to examine the light fastness of the dye image. The results are shown in Table 1. However, the light resistance of the dye image was determined by the dye residual ratio.

As is clear from Table 1, the samples using the anti-fading agent of the present invention (Nos. 4 to 15) are superior in anti-fading effect to the samples using known metal complexes (Nos. 2 and 3). And a blackish brown discoloration was hardly observed.

Example 2 15 kinds of samples (No. 16 to No. 16) were prepared in the same manner as in Example 1 except that the magenta dye having the following structure was used instead of the magenta dye (absorption maximum in a methanol solution: 536 nm). 30) was created. The obtained sample was exposed to a xenon fade meter for 5 days, and the light resistance of the dye image was examined. The results are shown in Table 2.

(Magenta dye) In Table 2 as well, it can be seen that the sample using the photofading preventing agent of the present invention has a superior photofading preventing effect to the sample using the known metal complex. Further, the sample according to the present invention showed almost no black-brown discoloration, and maintained a preferable hue even after the light resistance test.

Example 3 As a magenta coupler, a solution of 28 g of coupler (M-8) dissolved in 35 ml of dibutyl phthalate and 100 ml of ethyl acetate was added with 2.5 g of sodium dodecylbenzenesulfonate.
After adding to 500 ml of a 5% gelatin aqueous solution containing 5%, it was dispersed by a homogenizer, and the resulting dispersion was added to 1000 ml of green light-sensitive silver chlorobromide (containing 30 mol% of silver chloride) emulsion. ′, N ″ -triacryloylhexahydro-s
10 ml of a 2% solution of triazine in methanol was added and coated on polyethylene coated paper and dried to obtain a sample of a single color photographic material. This sample is No. 31.

When the above-mentioned emulsified dispersion liquid was prepared by the same method, 15 g of each of the comparative compounds (c) and (d) having the following structures were added in the same manner to prepare samples No. 32 and No. 33. .

Further, as shown in Table 3, 15 g of each of the exemplified compounds of the present invention was added and coated in the same manner to prepare 7 kinds of samples (Nos. 34 to 40).

Comparative compound (c): Compound described in JP-A-54-48538 Comparative compound (b): Compound described in JP-A-56-159644 After exposing each of these samples, they were processed by the following processing solutions and processing steps.

[Developer] Add water to 1 and use sodium hydroxide to adjust the pH to 1
Adjust to 0.30.

[Bleaching fixer]

Add water to make 1 and adjust the pH to 6.5 with aqueous ammonia.

[Treatment process] (30 ℃) Each sample on which a dye image was formed in this way was treated with a Kodak-Latten Filter N, which is an ultraviolet cut filter.
A fading test was carried out for 7 days using a xenon fade meter with o.2A attached.

The results are shown in Table 3.

The degree of fading was indicated by the change in the density of the density part 1.0 before the fading test.

(The absorption maximum of the colored magenta dye in a methanol solution is
It was 536 nm. As is clear from the results shown in Table 3, the photofading inhibitor of the present invention has a photofading preventing effect superior to that of the conventional organic fading preventing agent.

Example 4 A solution of 35 g of the coupler (C-6) exemplified as a cyan coupler in 35 ml of dioctyl phthalate and 100 ml of ethyl acetate was added to 2.5 g of sodium dodecylbenzenesulfonate.
After adding to 500 ml of a 5% gelatin aqueous solution containing 1%, it was dispersed by a homogenizer, and the resulting dispersion was added to 1000 ml of red-sensitive silver chlorobromide (containing 30 mol% of silver chloride) emulsion to prepare N, N as a hardener. ′, N ″,-triacryloylhexahydro-
10 ml of a 2% methanol solution of s-triazine was added, coated on polyethylene-coated paper and dried to obtain a sample of a monochromatic color photographic material. This sample is designated as No.41.

When preparing the above-mentioned emulsion dispersion in the same manner as in Example 3, 15 g of each of the comparative compound (e) having the following structure and the exemplified compound of the present invention as shown in Table 4 was added to each of 9 kinds of samples (No. 42). ~ 50)
It was created.

Comparative compound (e): Compound described in JP-A-59-87456 After exposing each of these samples, the dye image obtained by treating in exactly the same manner as in Example 3 was attached with an ultraviolet ray cut filter (the same as that used in Example 3), and then faded with a xenon fade meter for 10 days. Tested. The results are shown in Table 4.

(The absorption maximum of the colored cyan dye in a methanol solution is 65
It was 2 nm. As is clear from Table 4, the photofading preventing agent of the present invention has a large effect of preventing the photofading of the cyan coloring dye.

〔The invention's effect〕

By allowing the photobleaching inhibitor according to the present invention to be present together with an organic coloring substance, it is possible to remarkably reduce the discoloration due to light of the organic coloring substance, particularly a dye or dye used in a color photographic light-sensitive material.

Claims (1)

[Claims] 1. A photo-fading of an organic coloring substance, characterized in that the organic coloring substance and at least one compound represented by the following general formula [1] are allowed to coexist to prevent fading of the organic coloring substance to light. Prevention method. General formula [I] [In the formula, R ¹ represents a hydrogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, an acyl group, a sulfonyl group or a heterocyclic group, and R ² represents a substituent. n is 0 to 6
When n represents an integer of 2 or more, a plurality of R ^{2 s} may be the same or different. X represents a simple bond or a methylene group. ]