Classifications

• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
  • G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
  • G03C7/388—Processes for the incorporation in the emulsion of substances liberating photographically active agents or colour-coupling substances; Solvents therefor
  • G03C7/3882—Processes for the incorporation in the emulsion of substances liberating photographically active agents or colour-coupling substances; Solvents therefor characterised by the use of a specific polymer or latex
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C8/00—Diffusion transfer processes or agents therefor; Photosensitive materials for such processes
  • G03C8/02—Photosensitive materials characterised by the image-forming section
  • G03C8/04—Photosensitive materials characterised by the image-forming section the substances transferred by diffusion consisting of inorganic or organo-metallic compounds derived from photosensitive noble metals
  • G03C8/045—Photosensitive materials characterised by the image-forming section the substances transferred by diffusion consisting of inorganic or organo-metallic compounds derived from photosensitive noble metals with the formation of a subtractive dye image
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
  • Y10S430/142—Dye mordant

Definitions

• the method comprises a procedure for complexing said couplers or scavengers with finely divided particles of a coacervate, which has previously been prepared by reacting in an aqueous medium at least one of polymeric organic hydrophilic cationic compounds having cationic nitrogen-containing groups in their molecules with at least one of phthalic acid derivatives of gelatin polyvinyl alcohol and starch.
• This invention relates to an improvement of the method of introducing anionic color couplers for color-forming development, or scavengers similar in chemical structure to said color couplers, into the protective colloid binders of superposed emulsion layers, inter-layers or other layers of a multi-layered sensitive material.
• a method of "Agfa type or Fisher type As one of the methods for introducing color couplers, fast-to-dilfusion, into the emulsion layers of a photographic material, there has heretofore been known a method of "Agfa type or Fisher type. The method utilized in the present invention is considered to be an improvement of the method of this type.
• the method utilized in the present invention is an improvement which overcomes this drawback.
• substances which, like color couplers, couple in color forming developing with the oxidation intermediates of color developing agents but give dyes which are so unstable as to be immediately decomposed or give leuco dyes which are so stable as not to permit the formation of real dyes.
• scavengers for oxidation intermediates of color developing agents, which diffuse away from one emulsion layer and the scavengers are incorporated into an interlayer between the said two emulsion layers, thereby preventing the color-mixing.
• These scavengers are similar in chemical structure to the color couplers so they may also be made fast-to-dilfusion by introducing ballast groups and anionic groups and incorporating into inter-layers of a multi-layered color photographic material.
• the improved method utilized in the present invention is effective, like in the viscosity increase of coating solutions of inter-layers due to interaction between the scavengers and the binder molecules.
• the method utlized in the present invention aims to overcome various drawbacks encountered at the time of introduction of Agfa-type couplers, or scavengers similar in structure thereto, into the layers of a multilayered color photographic material, as mentioned above.
• the greatest drawback of extraordinary increase in viscosity of binder solutions, and other drawbacks may be overcome to a certain extent by suitable selection of couplers, scavengers or binders. According to the method utilized in the present invention, however, all the above-mentioned drawbacks can be overcome almost completely.
• the gist of the method employed in the present invention is to attain the complete dispersion of anionic color couplers, or anionic scavenger similar in structure thereto, and to prevent the viscosity increase due to interaction of the couplers or scavengers with binders; and also to prevent the micelle formation of couplers; in the hinder or occulsion of the developed silver grains in the dyes formed around them, utilizing a dispersion system of the coupler or scavenger, by complexing them with the coacervate particles formed by the interaction of anionic polymers having phthalic acid residue with a cationic polymer in an aqueous medium.
• coacervate particles suitable in size is facilitated by selection of cationic and anionic polymers, and, by means of excess cation groups in the resulting coacervate particles, anionic coupler or scavenger molecules are attracted onto the surface of said coacervate particles to form a complex, thereby firmly adsorbing each molecule onto the particle surface.
• the couplers or scavengers are completely dispersed, so that even when the couplers or scavengers are added in the dispersed form to the coating solutions of emulsion layers or inter-layers and mixed with hydrophilic colloid binders such as gelatin, polyacrylamide and the like, constituting said layers, no agglomeration of said coacervate particles takes place any more. Accordingly, not only the couplers are prevented from agglomeration or micelle formation but also the degree of interaction of couplers or scavengers with binders remains quite low, with the result that the viscosity increase of coating solutions is markedly lowered.
• the present invention provides an improved method of preparing multi-layered color photographic material, in which couplers have been introduced into the emulsion layers or contiguous layers and, if necessary, scavengers have been introduced into also emulsion layers or inter-layers between emulsion layers.
• the cationic polymer used in the aforesaid case is a polymeric organic hydrophilic compound having a cationic nitrogen-containing radical including various aliphatic amines, aromatic amines or other organic bases such as pyridine, morpholine, piperazine and guanidine, which may have wholly or partly been quaternarized.
• any dibasic acid other than phthalic acid can be used to form similar anionic polymer as well.
• the anionic polymer also can form a complex when brought into contact with the aforesaid cationic polymers in an aqueous solvent, but does not always bring about coacervation because of the fact that cationic polymers used in the invention are markedly high in hydrophilic property. That is, even when phase separation takes place, the solution is merely separated into 2 phases, and generally no coacervate in the form of oily drops suitable in size can be formed.
• the phthalic acid derivative is specific.
• This anionic polymer is made hydrophobic to a suitable extent when ortho-substituted benzene nuclei are arranged in large numbers in the molecular chain, as seen in the formulas shown above. It is therefore considered that the balance of hydrophilic and hydrophobic properties of the complex is suitably controlled to the hydrophobic side, and thus the phthalic acid derivative can bring about phase separation in an aqueous medium to form a dispersion of complex agglomerate in the form of oily droplets suitable in size.
• coacervate particles are also specific and they are extremely rich in number of nitrogen-containing radicals which impart cationic property to the cationic polymer.
• coacervate particles therefore, large numbers of excess cationic groups have been left without being sufiiciently neutralized with the anionic groups, so that the molecules of anionic couplers, or anionic scavengers similar in structure thereto, can be complexed with said cationic groups, in the coacervate particles as mentioned previously.
• the particle sizes of the coacervate are usually fine enough and are extremely stable. Even if a solution of an anionic coupler or scavenger is added to the dispersion of said coacervate particles to adsorb the molecules thereof onto the surfaces of said coacervate particles, the coacervates are usually sufliciently stable and do not agglomerate at all.
• coacervate particles are extremely fine and cannot be confirmed without an optical microscope.
• the diameter of coacervate particles are ranging from about 1 to p, and when the particles are cast into a thin layer on film and dried, the film is substantially transparent. Even when these particles are complexed with the anionic couplers used in the present invention and changed into dyes, the particles cannot be confirmed by the naked eyes and appear to have been colored uniformly.
• a process for preparation of a phthalic acid derivative has been well known from old times according to US. Pat. 2,525,753 (1950) or the like, and is carried out by reacting 100 parts of gelatin with 7 parts of phthalic anhydride. According to the above mentioned process, all the reactive e-amino groups of the gelatin have been substituted substantially completely and, even if the degree of substitution is of such an extent, a phthalic acid derivative suitable for the purpose can be obtained due to the hydrophobic or lipophilic property of the gelatin itself.
• a phthalic acid derivative having a substitution degree of about 50% is preferable'which is obtained by reacting 100 parts of polyvinyl alcohol with more than 300 parts of phthalic anhydride correspond to the substitution of, in average, one OH group in two vinyl alcohol units with phthalic acid.
• the derivative can easily be synthesized, like in the case of phthalic acid ester of cellulose, according to an ordinary procedure of reacting polyvinyl alcohol with phthalic anhydride in glacial acetic acid in the presence of anhydrous sodium acetate as a catalyst.
• the similar process as above may be utilized.
• the resulting phthalic acid derivative tends to be colored, so the present inventors prefer a special process which leads to a colorless product of about 33% substitution.
• a starting material a glucose polymer relatively low in molecular weight and less in branch such as amylose, soluble starch or dextrin, is preferred in the process and reacting parts of the starting material with about parts of phthalic anhydride at room temperature in a solvent such as formamide or dimethyl sulfoxide in the presence of anhydrous sodium acetate or potassium carbonate as a catalyst, the resulting mono-ester has in average one phthalic acid residue per one glucose unit in the molecule and is free from coloration and has relatively lower viscosity and is in suitable balance of hydrophobic and hydrophilic properties, and thus is preferable for the intended purpose.
• starch derivatives such as hydroxypropyl-starch and hydroxyethyl-starch, which are easily soluble in cold water, and low in degree of denaturation are also preferable as the starting materials.
• mixed derivatives with other dibasic acids and/or mono-basic acids are also usable for the intended purpose.
• mixed derivatives with maleic acid or acetic acid are useful.
• the combination use of maleic acid, which itself has crosslinking and hardening or curing actions due to the presence of double bonds, results in such advantages that no hardening agent is required and the resulting coacervate particles are enhanced in stability.
• anionic couplers or scavengers similar in structure to said couplers which have been used in the conventional Agfa-type color sensitive mate rial may be used as they are.
• non-diffusing effect can be attained even if the number of carbon atoms of ballast groups, which have been introduced into the coupler molecules in order to attain non-diffusing effect, is made considerably smaller.
• homologues of couplers which have not been able to display sufficient non-diffusing property unless a hexadecyl group is introduced therein, can sufficiently exhibit non-diffusing property by introduction of even a decyl group.
• S OaNB Azomethine- (Monohydrazone; magenta dye) without color
• white coupler type scavengers which are similar in structure to the couplers and couple like the couplers but initially give colorless leuco bases that are too stable to permit the formation of real dyes even by further oxidation, there are shown two compounds below.
• hydroquinone, p-aminophenol, resorcinol and many derivatives of phenols have been well known as substances which inactive oxidation intermediates of color developing agents through an oxidation reduction reactions with said intermediates, and most of them are nonionic.
• anionic compounds prepared by introducing sulfonic acid or carboxylic radicals into the above-mentioned phenol derivatives are used.
• Examples of the said compounds include 2- dodecyl-hydroquinone-S-sulfonic acid (Na salt), 2,5-dioctyl-hydroquinone-3-sultonic acid, 2,4-dioctylphenol-6- carboxylic acid and 4-decyl-l,3-resorcinol-6-sulfonic acid.
• hydrophilic colloid binders for forming main bodies of photographic layers are gelatin, casein, starch, gum arabic, hydroxyethyl cellulose, carboxymethyl-starch, polyvinyl alcohol, polyacrylic acid, polyacrylamide, polyvinyl pyrrolidone, vinylbined with hardeners, lost their original water-solubility and rather become water repellent are also included as hydrophilic colloid binders, since they retain properties of swelling by absorption of water.
• EXAMPLE 1 To this solution is gradually added at 50 C. in the form of a fine stream a solution of 1.5 g. of poly(methacryldimethylamino ethanol ester benzyl chloride salt) (the previously mentioned Compound VII) in 30 ml. of Water to form a stable suspension containing coacervate particles of less than 1,u in diameter. The suspension is charged with 6 ml. of a 10% formaldehyde solution and then stirred at 50 C. for 1 hour.
• poly(methacryldimethylamino ethanol ester benzyl chloride salt) the previously mentioned Compound VII
• the suspension is charged with 6 ml. of a 10% formaldehyde solution and then stirred at 50 C. for 1 hour.
• coacervate dispersion (about ml.) is thoroughly mixed with 50 ml. of a 4% solution of a magenta color coupler having the formula shown below (this solution is formed by dissolving the coupler in water using a minimum amount of N-NaOH solution).
• the resulting mixture is added to 300 ml. of a green color-sensitized silver chloride emulsion prepared by use of 10 g. of silver nitrate and 30 g. of gelatin, whereby an emulsion preferable for forming a green-sensitive emulsion layer of ordinary color paper can be obtained.
• the mixture is coated on a baryta paper at the coating weight of about 100 g./rn. whereby a monochrome color paper which gives magenta image is obtained.
• This color paper can be developed in entirely the same manner as in the case of a multi-layered color paper (refer to Example 3).
• EXAMPLE 2 The coacervate dispersion (about 100 ml.) prepared in Example 1 is thoroughly mixed with 60 ml. of a 3% solution of a cyan color coupler having the formula shown below (this solution is formed by dissolving the coupler in water using a minimum amount of N-NaOH and a small amount of methanol).
• the resulting mixture is added to 300 ml. of a redsensitive silver chloride emulsion prepared by use of 10 g. of silver nitrate and 30 g. of gelatin, whereby an emulsion preferable for forming a red-sensitive emulsion layer of color paper can be obtained.
• the mixture is coated on a baryta paper, like in Example 1, whereby a cyan color-forming monochrome color paper is obtained.
• EXAMP' IJE 3 The coacervate dispersion (about 100 ml.) prepared in Example 1 is thoroughly mixed with 40 ml. of a 10% solution of a yellow color coupler having the general formula shown below (this solution is formed by dissolving the coupler in methanol using minimum amounts of NaOH and water).
• a silver chloro'bromide emulsion prepared by use of 10 g. of silver nitrate and 35 g. of gelatin.
• This emulsion is coated at the coating weight about 100 g./m. on the surface of a so-called RC (resin-coated) photographic paper, which has been prepared by coating a thin film of white opaque polyethylene on surface side and a thin film of colorless polyethylene on back side of a base paper, to form a bluesensitive emulsion layer on the photographic paper.
• 100 ml. of the coacervate dispersion of Example 1 is mixed with a solution of 1.5 g. of a scavenger having the formula shown below in 50 ml. of methanol, thereby adsorbing the scavenger fast-to-dilfusion onto the coacervate particles, like in the case of the coupler.
• the resulting mixture is coated on the aforesaid emulsion layer at the coating weight of about 60 g./m. and then dried to form an inter-layer.
• inter-layer are further coated in this order about 100 g./m. of the magenta color-forming green-sensitive emulsion layer as in Example 1 and about 60 g./m. of the same inter-layer as mentioned above.
• a coating of about 100 g./m. of the cyan color-forming red-sensitive emulsion is charged with a dispersion of 2 g. of a brightening agent having the formula,
• the resulting mixture is finally coated on the aforesaid multi-layered emulsion layer at the coating weight of about 100 g./m. to form an overlayer.
• a multi-layered color paper is obtained.
• the color paper is preferable for preparing a color print from a color negative. After exposing from a suitable color negative, the color paper is developed (25 C., 4 minutes), stop-fixed (25 C., 4 minutes), water-washed (room temperature, 1 minute), bleach-fixed (25 C., 4 minutes), water-washed (1 minute) and stabilized (25 C., 3 minutes), using the solutions mentioned below, and then dried.
• Color-forming developer G. Hydroxyethyl-ethylaminoaniline sulfate 7.5 Hydroxylamine 4.0 Sodium carbonate (monohydrate) 70.0 Potassium bromide 1.0 Anhydrous sodium sulfite 3.0 Sodium hexametaphosphate 2.0
• Stop-fixer G. Sodium thiosulfate (pentahydrate) 220 Potassium metabisulfite 15.0 Anhydrous sodium acetate 23.0 Boric acid 9.0 Potassium alum 15 .0 Water to make 1.0 liter.
• Ethylenediamine tetraacetic acid 42.0 Sodium hydroxide 20.0 Ferric chloride (hexahydrate) 26.0 Sodium thiosulfate (pentahydrate) 200.0 Anhydrous sodium sulfite 10.0 Water to make 1.0 liter.
• EXAMPLE 4 100 grams of a polyvinyl alcohol having a polymerization degree of about 500 is dispersed in 1 liter of glacial acetic acid in a three-necked flask equipped with a silica tube. To the resulting dispersion are added 250 g. of phthalic anhydride, 100 g. of maleic anhydride and 75 g. of anhydrous sodium acetate, and the resulting mixture is reacted with stirring at C. for 10 hours.
• the reaction light is poured into 8 liters of acetone quently, the reaction liquid is poured into 8 liters of acetone to deposit a precipitate, which is then recovered by filtration, washed with acetone and dried to obtain 450 g. of a pure white powder.
• esterification degree is difl'lcult, it is inferred that about 50% of hydroxyl radicals in the molecules are changed to phthalic monoester and about 10% of hydroxy radicals are changed to maleic monoester.
• the resulting coacervate dispersion is cooled and stored in a refrigerator and the dispersion can be used any time as occasion demands, because the cross-linking is limited only within the coacervate particles and does not extend into the whole dispersion.
• Example 3 When the operation of Example 3 is repeated, using 100 ml. of the thus prepared coacervate dispersion in place of 100 ml. of the coacervate dispersion used in each of Examples 1, 2 and 3, the similar color paper as in Example 3 can be prepared.
• EXAMPLE 5 To 100 ml. of the coacervate dispersion of Example 4 is added 100 ml. of a 2% solution of a cyan color-forming orange coupler having the formula shown below (this solution is formed by dissolving the coupler in a 1:1 mixture of methanol and water using a minimum amount of NaOH) to adsorb the coupler onto the coacervate particles by formation of a complex.
• the resulting yellow liquid is diluted with an equal amount (200 ml.) of a gelatin solution, and coated on a transparent film base in a proportion of about 150 g./m. followed by drying, to prepare a color-forming film.
• This film is not a sensitized material but can be used to give a color image having two colors of cyan and orange suitable for advertisement and the like purposes, in combination with a silver halide sensitized material.
• the color-forming film thus prepared is dipped in color-forming developer of Example 3 to absorb sufficient amount of the developer in the film. Then in a dark room, a commercially available low sensitive paper or direct positive paper is exposed by reflex-copying to form thereon a latent image of a suitable letter or drawing (assuming as a black letter or line on a white background).
• the sensitized paper bearing the latent image of said letter or line is immersed into the above-mentioned color-forming developer and superposed in register with the aforesaid color-forming film which has absorbed the developer.
• the resulting composite is slightly squeezed and then pressed for 3 minutes on a hot plate at 30 C.
• a cyan letter or line with an orange background is formed, while when a direct positive paper is used, an orange letter or line with a cyan background is formed.
• prepared copy can be dried after brief rinse with water, and does not require to such time-taking and troublesome treatments as fixing, bleaching or washing.
• the copy is clear in color and hence is promising as an advertise- 12 ment plate or the like display to be illuminated from the back.
• EXAMPLE 6 A mixture comprising 50 g. of a commercially available soluble starch and 68 g. of phthalic anhydride is reacted at slightly elevated temperature below 60 C. for 1 hour in 200 ml. of formamide in the presence of 37.5 g. of anhydrous sodium acetate to obtain a phthalic monoester of starch.
• monoester is precipitated in 1.2 liters of acetone and then washed with a mixture of methanol and acetone to obtain about 87 g. of said monoester as a white powder (about 70% of the carboxylic acid groups are sodium salts).
• the degree of substitution thereof is 35% (in average 1.05 phthalic acid residue per unit ofglucose) 3 grams of this monoester and 0.4 g. of gelatin are dissolved in 100 ml. of water, and resulting solution is adjusted to pH 6.5 and heated to 50 C.
• an aqueous solution of aminoguanidized dialdehyde starch is prepared. Since a commercially available aminoguanidized dialdehyde starch is low in degree of aminoguanidation (about 5%), the aqueous solution of said starch is prepared by dispersing a commercially available dialdehyde starch (Sumstar-ISO produced by Miles Laboratories Inc.; oxidation degree about 50 in 300 ml. of water, adding to the resulting dispersion a solution at pH 2 of 45 g. of aminoguanidine hydrochloride in 450 ml. of Water, and then reacting the resulting mixture at room temperature for 20 hours.
• a commercially available dialdehyde starch Sudstar-ISO produced by Miles Laboratories Inc.; oxidation degree about 50 in 300 ml. of water
• oxidation degree about 50 in 300 ml. of water
• This coacervate dispersion can also form a complex with an anionic color coupler or scavenger, like in the case of the coacervate dispersion of Example 1 or 4, and the resulting dispersion may be incorporated into photosensitive silver halide emulsion layers or inter-layers to prepare a multi-layered color photographic material identical with or similar to that mentioned in Example 3.
• the dispersion may be used for preparing nonsensitive color material as mentioned in Example 5.
• EXAMPLE 7 This example shows a case of a reversal material which utilizes a so-called silver complex diffusion transfer system to a multi-layered color film. According to this system, a color slide can be obtained by direct camera-exposure.
• a scavenger stock solution is prepared by mixing and complexing 500 ml. of the coacervate dispersion obtained in Example 6 with 250 ml. of a 4% solution of 2,5-dioctyl-hydroquinone-3-sulfonic acid (Na salt).
• the first layer of the composite multi-layer color film is applied at the coating weight of about g./m. of a mixture comprising 300 ml. of a red-sensitized high speed silver iodobromide emulsion and ml. of the above-mentioned scavenger stock solution is coated to form a first layer.
• the second layer is applied at the coating weight of about 80 g./m.
• Example 6 a mixture prepared from 160 ml. of the coacervate dispersion of Example 6, in which a cyan coupler has been dispersed beforehand in the form a complex, as in Example 1, and 300 ml. of a reduction-nuclei solution of the composition shown below.
• Gelatin g 20 Polyvinyl alcohol g 20 Vinylmethylether-maleic anhydride copolymer g 10 Colloidal dispersion of cadmium sulfide (1%) ml 15 Water to make 1 liter.
• the third layer is applied by coating thereon about 60 g./m. of a mixture from 300 ml. of the above-mentioned reduction-nuclei solution with 150 ml. of the aforesaid scavenger stock solution
• the fourth layer is applied by coating thereon about 100 g./m. of a mixture comprising a greensensitized high speed silver iodobromide emulsion and the scavenger stock solution.
• the fifth layer is further applied by coating thereon about 80 g./ m? of a mixture comprising 300 ml. of the reductionnuclei solution and 160 ml. of the coacervate dispersion complexed with 2 g. of a magenta color-forming yellow coupler of the following structural formula:
• This yellow coupler acts as a filter layer, and not only cuts the intrinsic sensitivities to the ultraviolet radiation of the lower two layers, i.e. redand green-sensitive emulsion layers, but also acts as a coupler to form a magenta image.
• unreacted yellow coupler has a property to lose yellow color during the treatment after development.
• the sixth layer is applied by coating thereon about 60 g./m. of the same mixture as used for formation of the third layer, and on the sixth layer the seventh layer is applied by coating thereon about 100 g./m. of a mixture comprising 150 ml. of the scavenger stock solution and 300 ml.
• the color film is treated at 25 C. for 5 minutes with the following developer.
• Example 3 Thereafter, the developed film is subjected to the same stop-fixing, bleach-fixing and stabilizing treatments as in Example 3, whereby a transparent positive image for color slide can be obtained immediately.
• a color photographic material comprising silver halide emulsion layers, interlayers, or, overlayer and also comprising anionic color couplers for color-forming development, finely dispersed and made fast-to-diifusion in protective colloid binder of emulsion layers or contiguous layers thereto by a complexing procedure of said couplers with finely-divided particles of the coacervate which is prepared beforehand by reacting at least one of polymeric organic hydrophilic cationic compounds having cationic nitrogen-containing groups in their molecule, with at least one of phthalic acid derivatives of gelatin, polyvinyl alcohol and starch in an aqueous medium.
• a color photographic material comprising silver halide emulsion layers, interlayers, or overlayer and also comprising anionic scavengers for color-forming development, finely dispersed and made fast-to-dilfusion in protective colloid binder of interlayers or emulsion layers by a complexing procedure of said scavengers with finelydivided particles of the coacervate which is prepared beforehand by reacting at least one of polymeric organic hydrophilic cationic compounds having cationic nitrogencontaining groups in their molecule, with at least one of phthalic acid derivatives of gelatin, polyvinyl alcohol and starch in an aqueous medium, the anionic scavengers being phenols having a sulfonic acid or carboxylic acid group attached to the phenol molecule.
• a color photographic material comprising silver halide emulsion layers, interlayers, or overlayer and also comprising either anionic couplers or anionic scarvengers for color-forming development, finely dispersed and made fast-to-difi'usion in protective colloid binders of emulsion layers or interlayers respectively according to their purposes by a complexing procedure of said couplers and scavengers with finely divided particles of the coacervate which is prepared beforehand by reacting at least one of polymeric organic hydrophilic cationic compounds having cationic nitrogen containing groups in their molecule, with at least one of phthalic acid derivatives of gelatin, polyvinylalcohol and starch in an aqueous medium, the anionic scavengers being phenols having a sulfonic acid or carboxylic acid group attached to the phenol molecule.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Chemical & Material Sciences (AREA)
• Inorganic Chemistry (AREA)
• Silver Salt Photography Or Processing Solution Therefor (AREA)
• Glanulating (AREA)
• Manufacturing Of Micro-Capsules (AREA)

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Cited By (3)

• 1970
  • 1970-12-08 JP JP45108829A patent/JPS4946938B1/ja active Pending
• 1971
  • 1971-12-06 US US00205400A patent/US3806347A/en not_active Expired - Lifetime
  • 1971-12-07 DE DE19712160714 patent/DE2160714A1/de not_active Withdrawn

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