DE2311207A1 - IMAGE RECORDING MATERIAL FOR THE COLOR DIFFUSION TRANSFER PROCESS - Google Patents

Description

"BREATHING ADVERTISERS

DR.E.WIEGAND DIPL-ING. W. NiEMANN 2311207

DR. M. KÖHLER DIPL-ING. C. GERNHARDT

MÖNCHEN HAMBURG TELEPHONE: 55547 «8000 MU NCH EN 15, TELEGRAMS: KARPATENT NUSSBAUMSTRASSE 10

W 41 505/73 - Ko / DE March 7, 1973

Fuji Photo Film Co., Ltd., Minami Ashigara-shi, Kanagawa / Japan

Image recording material for the Farh Diffusion Transfer

procedure

The invention is concerned with an image pickup material for the diffusion transfer color photographic process, and particularly relates to an image receiving material for the color photographic diffusion transfer process, this imaging material being an improved layer to control the neutralization speed.

According to the invention, an image recording material for the color diffusion transfer method with a control layer for the degree of neutralization or the rate of neutralization equipped, which at least one polymer of monomethacrylic acid or monoacrylic acid esters of a polyhydric alcohol.

In general, in color photographic diffusion

em
Ion transfer process, color formers such as a dye developer or a diffusible coupler type developer are incorporated into a negative photosensitive layer together with a photographic silver halide emulsion, and after exposure of the negative photosensitive emulsion layer, the negative layer is brought into contact with a positive layer with an alkali treating agent therebetween, whereby the photo-

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OnJGJNAL JNSP £ CT £ D

silver halide graphic emulsion is developed and at the same time, the above-mentioned color former diffuses into and from the alkaline treating agent there is transported into the positive layer.

Alkaline and water-insoluble materials are widely used as color formers, however This type of color former exhibits the defect that when the positive layer containing it is exposed to air after completion is exposed to transfer, the material will oxidize to discolor and form colored stains will. To prevent this, an acidic polymer layer for neutralization is usually placed between the image receiving layer and brought the positive layer support. When the acidic polymer layer to neutralize is applied between the two layers, oxidation of the transferred color image can be prevented, so that the occurrence of discoloration and the formation of stains are prevented.

If, however, the neutralization of the alkaline treating agent through the acidic polymer layer to the new

tralization takes place too quickly, the color former diffuses in the alkaline treatment agent only with difficulty due to the decrease in pH, so that there is a decrease in the efficiency of diffusion transfer results. Therefore, it is necessary to adjust the degree of neutralization or the rate of neutralization by further application of a polymer layer, this polymer layer hereinafter being used as the "degree of neutralization control layer" is referred to, between the image receiving layer and the acidic polymer layer for neutralization to attach.

In U.S. Patent 3,362,819 the application is such a degree of neutralization control layer and for this purpose polymers of polyvinyl alcohol, partially acetalized polyvinyl alcohol or gelatin as

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Polymers are preferred for the degree of neutralization control layer. However, if the polymers specified in the patent are used for the neutralization outflow control layer are used, a sufficient color density of the formed images in the image receiving layer is not obtained, since the degree of neutralization of the alkaline treating agents is still too high even in such a case.

An 'object of the invention is therefore one for the neutralization amount control layer of an image receiving layer suitable polymers.

Another object of the invention is an image receiving layer for a color diffusion transfer photographic process, which gives high color density, low spotting images. ·

As a result of various studies to achieve the above objects of the invention, various have been made found effective polymers that accomplish the above objects.

According to the invention, there is thus also an image recording material for the color diffusion transfer method a neutralization amount control layer which a-Is Component of at least one polymer made from homopolymers, copolymers and Graft polymers of monomethacrylic acid esters of polyhydric alcohols and / or monoacrylic acid esters of polyhydric alcohols.

The image receiving material for the color diffusion transfer process according to the invention basically comprises a carrier with an acidic polymer layer thereon for neutralization, a neutralization amount control layer and an image receiving layer for pickling of dyes.

Examples of carriers which can be used according to the invention are baryta-coated papers, laminated papers coated with resins such as polyethylene, polypropylene and polystyrene, sheets from organic cellulose acid esters such as cellulose diacetate,

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Cellulose triacetate, cellulose butyrate, cellulose propionate and cellulose acetate butyrate, sheets of inorganic acid esters such as cellulose nitrate, sheets of polyesters such as poly ethylene terephthalate, sheets of polyvinyl acetals such as polyvinyl formal, Polyvinyl butyral, polyvinyl acetal and polyvinyl benzal and bows in front of polyalkylenes such as polystyrene, Polypropylene, polyethylene and polyvinyl chloride, polycarbonate and the like.

As polymers for the acidic polymer layer for neutralization of the image receiving material according to the invention all polymers with one or more carboxyl groups, sulfo groups or groups that change to carboxyl groups change through hydrolysis and have film-forming properties, including homopolymers, copolymers and graft polymers of vinylbenzenesulfonic acid and similar materials are used. The acidic polymer preferably has a molecular weight of from about 10,000 to about 100,000. For example, a monobutyl ester of a 1: 1 copolymer of maleic anhydride and the monobutyl ester of the 1: 1 copolymer of maleic anhydride and methyl vinyl ether can be used as in U.S. Patent 3,362,819 stated. Other examples of polymers for the acidic polymer layer for neutralization are the monoethyl ester, the monopropyl ester, the monopentyl ester and the monohexyl ester of the 1: 1 copolymer of maleic anhydride and ethylene, the monoethyl ester, the monopropyl ester, the Monopentyl ester and the monohexyl ester of the 1: 1 copolymer of maleic anhydride and methyl vinyl ether, polyacrylic acid, Polymethacrylic acid, copolymers of acrylic acid and Methacrylic acid with various component ratios and copolymers of acrylic acid or methacrylic acid and others Vinyl monomers in various component ratios, for example acrylic esters, methacrylic esters, vinyl ethers and the like, which are advantageously at least 30 mol # Acrylic acid or methacrylic acid and preferably about 50

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contain up to about 90 mol% acrylic acid or methacrylic acid. The polymers listed above are usually in an alcohol such as methanol, ethanol, propanol and butanol, a ketone such as acetone, methyl ethyl ketone or cyclohexanone, an ester such as ethyl acetate and butyl acetate or a mixture of these solvents and then applied to the carrier as a solution. Although above a copolymerization ratio of 1: 1 is given, this is merely exemplary and molar ratios from 100: 0 or 0: 100 can be used, whereby attention must be paid to the limits of this range, that at least one carboxyl and / or sulfo group is present

he

den, whereby among the other vinyl monomers also acrylic esters be included.

The thickness of the acidic polymer layer formed in this way cannot be generally defined because it varies according to the composition and the amount of the alkaline treating agent, but is usually 5 to 30 microns.

In the following, the neutralization amount control layer which is the feature of the invention will be explained.

The one used in the neutralization extent control layer Polymers is an alkali-permeable and water-permeable polymer. Generally speaking, this is in Polymers used in the degree of neutralization control layer a homopolymer, copolymer or graft polymer a monomethacrylic acid ester and / or monoacrylic acid ester of a polyhydric alcohol.

There is no particular limitation on it polyhydric alcohols used, as long as the polymer obtained is permeable to alkali and water. The preferred polyhydric alcohols used according to the invention, the

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Can be aliphatic or aromatic can be classified as Designate compounds with at least 2 aliphatic hydroxyl groups, preferably compounds with two to five aliphatic hydroxyl groups and 2 to 12 carbon atoms. There are, for example, diols such as polyethylene glycol, Polyethylene oxide, polypropylene oxide, polybutylene oxide, polycyclohexene oxide, polystyrene oxide, polyoxetane, polytetrahydrofuran, Cyclohexanediol, xylylene diol, di- (ß-hydroxyethoxy) benzene, Polyols such as glycerin, diglycerin, trimethylolpropane, triethylolpropane, pentaerythritol and the like. Specific Examples of monomethacrylic acid esters of polyhydric alcohols or monoacrylic acid esters of polyhydric alcohols Alcohols are 2-hydroxyethyl methacrylate, 3-hydroxypropyl methacrylate, 2-hydroxypropyl methacrylate, 4-hydroxybutyl methacrylate, 5-hydroxypentyl methacrylate, 2,2-dimethyl 1-3-hydroxypropyl methacrylate, Diethylene glycol monomethacrylate, Trimethylolpropane monoethacrylate, pentaerythritol monomethacrylate, 2-hydroxypropyl acrylate, 3-hydroxypropyl acrylate, 4-hydroxybutyl acrylate, 5-hydroxypentyl acrylate, 2,2-dimethyl-hydroxypropyl acrylate, Diethylene glycol monoacrylate, trimethylolpropane monoacrylate, Pentaerythritol monoacrylate and similar materials.

As usable comonomers for the formation of copolymers with the esters listed above in the context of the invention can all monomers polymerizable by addition can be used and preferred are monomers having a vinyl or vinylidene group. examples for this are Amides or esters with 3 to about 15 carbon atoms of acrylic acid or methacrylic acid, such as acrylamide, methacrylamide, Diacetone acrylamide, acryloylmorpholine, alkyl acrylates and methacrylates such as methyl methacrylate, ethyl methacrylate, Methyl methacrylate, propyl acrylate, propyl methacrylate, chloroethyl acrylate, Chloroethyl methacrylate, butyl acrylate, pentyl methacrylate, Hexyl acrylate and hexyl methacrylate, vinyl ester such as vinyl acetate, vinyl butyrate, vinyl propionate, vinyl benzoate,

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Vinyl ethers such as chloroethyl and butyl vinyl ethers, styrenes, such as styrene, chlorostyrene, methoxystyrene, methylstyrene, Chlorine thy Is tyr oil, dichlorotyrene, acrylonitrile, methacrylonitrile, Vinyl pyrrolidone, vinyl imidazole, vinyl chloride, vinylidene chloride, methyl vinyl ketone, vinyl pyridine, vinyl methyl pyridine, Vinylethylpyridine, vinylmethylimidazole, the diacrylates of aliphatic polyhydric alcohols and the dirnethacrylates of polyhydric alcohols, where polyhydric alcohols discussed above can be used as examples. One, two or more such comonomers can be copolymerized with the monomethacrylic acid ester or monoacrylic acid ester.

Regarding the component ratio of the copolymers, it is preferred that the ratio of the monomethacrylic acid ester of the polyhydric alcohol or the monoacrylic acid ester of the polyhydric alcohol is more than 50 mol, particularly is more than 60 mole #.

The molecular weight of that in the degree of neutralization control layer polymers used is usually more than 10,000, preferably 50,000 to 600,000.

As to the formation of a graft polymer with the νοΓτ standing esters usable components according to the invention is preferably gelatin, polyvinyl alcohol, polyacrylamide, Carboxymethyl cellulose, starch, hydroxyethyl cellulose and the like are used.

Those in the degree of neutralization control layer material Polymers used can drive by any conventional Ver, for example by solution polymerization, graft polymerization and the like. Practical examples of the preparation of the polymers are as follows indicated.

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Production example 1

200 g of 2-hydroxyethyl methacrylate were added to a mixed solvent of 550 ml of water and 550 ml of ethanol in a reaction vessel. After 1 g of potassium persulfate and 1 g of sodium hydrogen sulfite had been added to the mixture, the oxygen in the reaction ^{vessel was flushed out with nitrogen gas and the mixture was then stirred at 60 °} C. in the vessel for 4 hours.

The liquid reaction product was filtered and then poured into cold water (10 times the amount of the filtrate), whereby the purified polymer produced in the reaction precipitated. The polymer was recovered and dried by means of a vacuum dryer. The amount of the polymer was 160 g and the molecular weight thereof 350,000.

Production example 2

176 g of 2-hydroxyethyl methacrylate and 24 g of acrylamide were added to a mixed solvent of 550 ml of water and 550 ml of ethanol in a reaction vessel. 0.8 g of potassium persulfate and 0.8 g of sodium hydrogen sulfite were further added to the mixture and the vessel was then flushed with nitrogen gas and the mixture was stirred ^{at 70 ° C. for 3 hours.} The reaction product was put in the container of a dialysis film, and after dialysis was carried out for 15 to 20 hours in flowing water, the product was dried by means of a freeze dryer. The amount of the product was 197 g, and the average molecular weight thereof was 20,000.

Production example 3

300 g of 3-hydroxypropyl methacrylate became a mixed solvent from 400 ml of water and 800 ml of ethanol are added in a reaction vessel and after a further addition of 1 g

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Azobisisobutyronitrile to the mixture became the vessel filled with nitrogen gas. Then the mixture became during Stirred for 3.5 hours while maintaining a temperature of 7CK in the reaction system. The liquid reaction product was filtered and poured into cold water (10-fold Amount of the same) poured, so that the polymer obtained in the reaction precipitated. The precipitated polymer was recovered and dried using a vacuum dryer. The amount of the polymer was 260 g and the average Molecular weight thereof was 570,000.

Preparation example 4

94 g of 2-hydroxyethyl acrylate were mixed with 106 g of 2-hydroxyethyl methacrylate copolymerized in the same manner as in Production Example 2. The amount of the produced Copolymers was 186 g and the average molecular weight thereof was 230,000.

Preparation example 5

419 g of 2-hydroxyethyl methacrylate and 81 g of methyl methacrylate were added to a mixed solvent of 500 ml of water and 1500 ml of methanol in a reaction vessel. After a further addition of 1.5 g of benzoyl peroxide to the mixture, the oxygen in the vessel was flushed out with nitrogen gas and the mixture was then stirred ^{at 60 ° C. for 4.5 hours.} The formed copolymer was purified and dried in the same manner as in Production Example 3. The amount of the copolymer was 430 g and the average molecular weight thereof was 480,000.

Production example 6

50 g of hydroxyethyl cellulose were added to a mixed solution of 750 ml of water and 150 ml of ethanol and were dissolved therein at 60 ^° C. in a reaction vessel. To

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By flushing the vessel with nitrogen gas, the Tem was increased temperature of the reaction system at 75 ⁰ C and then dropwise addition of a dispersion of 0.3 g of benzoyl peroxide in 50 g of 2-hydroxyethyl methacrylate through a dropping funnel to the reaction system for 4 hours was hei 75 ⁰ C touched. The reaction product was placed in the container of a bialysis membrane and, after carrying out the dialysis for 20 hours in flowing water, the product was dried by means of a freeze dryer. The amount of polymer was 88 g.

The polymers employed in this invention for the Heutralisationsausmaßsteuerungsschicht can species are released from solvents in various which, and particularly it is preferred that the polymers to in a solvent such as ethanol, methanol-water, ethanol-water, acetone, acetone-water, methyl ethyl ketone and methyl ethyl ketone-water to solve. Furthermore , not only can the above systems with one component and binary solvents be used , but ternary and higher solvent systems can also be used in accordance with the invention.

The polymers for the degree of neutralization control layer according to the invention can be used alone or can be used as a mixture of two or more polymers as well as with other polymers, organic plasticizers and organic materials such as barium sulfate.

Further, the Neutralisationsausmaßsteuerungs- of the invention, according to a layer Einzelschiohtstruktur have or may consist of two or more layers may be constructed or may further contain a layer structure to be combined with a layer of another polymer.

Examples of the above polymers for Heutralisationsausinaßsteuerungsschicht according to the invention vennischbare polymers or for the usable with the Neutralisationsausraaßsteuerungsschicht combined layer are gelatin, polyvinyl alcohol, polyacrylamide, polyalkylene oxides,

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such as polyethylene oxide, polypropylene oxide and polybutylene oxide, carboxymethyl cellulose, hydroxyethyl cellulose, Poly-4-vinyl pyridine and polyvinyl acetate. The ones with the polymers for the degree of neutralization control layer Miscible polymers should preferably have good miscibility. Therefore it is preferred to use polymers with the same polarity to the polymer of the neutralization scale to apply your control layer.

If a mixture of the polymer from monomethacrylic acid esters or monoacrylic acid esters of polyhydric alcohols and the other polymers listed above is used, the mixing ratio can be selected as desired, but the proportion is further polymer preferably about $ 50 or less.

It is also beneficial when the dry starch of the out. one or more polymers of the dye image-receiving unit The established neutralization amount control layer according to the invention is 3 to 20 microns, however, the Strength can be varied appropriately according to the end use in question.

As the image receiving material, it is necessary to use a material which has a hydrophilic layer which is capable of pickling a diffusible dye. It is thus preferred to use a hydrophilic, basic and film-forming polymer or a hydrophilic and film-forming polymer containing a basic polymer to use. As specific examples of image receiving layers according to the invention, mixtures of polyvinyl alcohol are used and poly-4-vinylpyridine as in U.S. Patent 3,148,061 specified, preferably used, but other materials, for example partially acetalized Products of polyvinyl alcohol (degree of acetylation not more than 20 #) and trialkylammonium benzaldehyde quaternary salts, Copolymers of vinyl alcohol and N-vinylpyrrolidone (with all copolymerization ratios applied can be), condensed acetalization products

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ORIGINAL

(Condensates with a molar ratio of about 4: 1 to about 2: 1) of polyvinyl alcohol and poly-N-vinylpyrrolidone and condensed acetalization products (molar condensates from about 4: 1 to about 2: 1) of polyvinyl alcohol and 4-pyridinecarboxaldehyde for the image receiving layer be used. This list serves only as an example of materials that make up the preceding meet general regulations.

- The image recording material according to the invention can furthermore, if desired, an intermediate layer for improvement the adhesion between the carrier and the polymer layer and between the polymer layers themselves. Examples of the materials that can be used as intermediate material are polyvinyl alcohol, gelatin, carboxymethyl cellulose, Hydroxyethyl cellulose, polyvinylpyrrolidone, polyvinyl acetal and the like. The strenght the intermediate layer is conveniently about 1 micron up to about 10 microns.

When applying the image receiving material to the color diffusion transfer method according to the invention a sharp color image with little staining is obtained.

Compared with an image receiving material having an amount of neutralization control layer made of polyvinyl alcohol or a partially acetalized polyvinyl alcohol as described in US Pat. No. 3,362,819 is equipped, the image receiving material according to the invention has numerous advantages and it is for example the density of the images formed is higher, so that images with a larger range of graduation are reproduced can be.

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The polymers for the degree of neutralization control layer according to the invention can be used for degree of neutralization control layers of image receiving materials for various types of color diffusion transfer processes can be used. For example, the polymers can be used for degree of neutralization control layers in systems using dye developers according to the US patent 2,983,606 and also in systems employing coupler developers according to U.S. Patent 3 227 551 can be used.

The following examples serve to further illustrate the invention.

example 1

The color image receiving material, the alkali processing agent and the negative photosensitive film were prepared in the following manner. After imagewise exposure of the negative photosensitive film, the negative film was combined with the Farbbildaufnahinbmaterial and the alkaline treatment agent therebetween so inserted that the thickness of the layer of the alkali treating agent was about 200 microns (20 ⁰ C), so ^that: diffusion transfer process has been performed. The time required for the diffusion transfer process was 2 minutes.

By the treatment, a color image with fewer stains and with higher color density is formed on the image receiving layer obtain.

A) Production of the image recording material:

A white baryta-coated paper with a polyethylene coating thereon was made with the layers a), b) and c) covered in this order:

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ORIGINAL INSPECTED

-H-

a) acidic polymer layer:

A 20% ethyl acetate solution of the monohutyl ester (average molecular weight 100,000) of the 1: 1 copolymer of maleic anhydride and vinyl methyl ether with units the following formula

-CH ₀ -CH CH - CH -} -

² III ⁿ

OCH, C = O C = O

^ I

OH

was drawn down on the support to a dry thickness of 20 microns.

b) Neutralization Extent Control Layer:

20 g of the homopolymer of 2-hydroxyethyl methacrylate _r according to Preparation Example 1, were dissolved in a mixed solvent of 60 ml of acetone and 20 ml of water and the solution was applied on the acidic polymer layer to a dry thickness of 8 microns.

c) Image receiving layer:

6 g polyvinyl alcohol (degree of saponification 98 #, degree of polymerization 1800) and 3 g of poly-4-vinylpyridine (molecular weight 70,000 to 80,000) were dissolved in 150 ml of water containing 2 g of glacial acetic acid and the solution onto the degree of neutralization control layer applied to a dry thickness of 7 microns.

B) Preparation of the alkaline treatment agent:

The alkaline treating agent was made by mixing the following ingredients:

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aqueous 4N sodium hydroxide solution 2.5 ml

20% by weight N-benzyl picolinium bromide 1 ml

Benzotriazole 0.35 g

Water 3.0 ml

highly polymerized hydroxyethyl

cellulose 0.35 g

(Soda Oil 250 HR from Hercules Incorporated)

C) Making the negative film:

A cellulose triacetate film with a gelatin undercoat was coated with the following three layers as a monochromatic system.

a) Dye developer report:

10 g of 1-phenyl-3-n-hexylcarboxyamide-4- ^ p-2 ^l , 5 ^f -dihydroxyphenethylphenylazo7-5-pyrazolone were dissolved in a mixture of 10 ml of Nn-butylacetanilide and 25 ml of cyclohexanone with heating Emulsification in 100 g of an aqueous gelatin solution with 10 wt .- # with a content of 8 ml of a v / aqueous solution. of sodium n-dodecylbenzenesulfonate at 5 wt .- ^ dispersed. The emulsion was further mixed with 5 ml of an aqueous solution containing 2% by weight of hydroxy-4,6-dichloro-s-triazine as a hardening agent for gelatin, and then water was added so that the total amount of the emulsion became 300 g. The aqueous emulsion was applied to the support to a dry thickness of 1.5 microns.

b) Photographic silver halide emulsion layer:

A silver iodobromide emulsion (7 mol- # silver iodide) with a content of 3.5 x 10 Hol silver and 6.5 g gelatin per 100 g emulsion was applied to the dye developer layer Applied at a dry thickness of 1.5 microns.

c) Gelatin protective layer:

5g of 4'-methylpheny! Hydroquinone were in a mixed

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ORIGINAL INSPECT! ©

solvent of 10 ml of tri-o-cresyl phosphate and 10 ml ethyl acetate and the solution was dispersed by emulsification in 10 g of an aqueous gelatin solution containing 10 wt .- ^ with a content of 2 ml of an aqueous solution of sodium n-dodecylbenzenesulfonate 5 wt. -f ° dispersed. Then, 100 ml of an aqueous solution containing 10 g of the emulsion thus prepared and 5 ml of a mucochloric acid solution of 2% by weight as a hardening agent for gelatin were coated on the silver halide emulsion layer to a dry thickness of 1 micron.

Furthermore, an image recording material was prepared as a comparative sample in the same V / eise as above, but an aqueous solution of polyvinyl alcohol (degree of polymerization 1800, degree of saponification 98 $) with 10 wt .-% to a dry strength of 8 microns instead of the homopolymer of 2-hydroxyethyl methacrylate was applied as a neutralization extent control layer of the image receiving material. When the diffusion transfer process was carried out in the above manner using the image receiving material prepared in this way, an image having few stains was obtained, but the color density of the image was only 60 % of the color density of the image obtained with the image receiving material according to the invention.

Example 2

An image receiving material was prepared in the same manner as in Example 1 except that one was prepared by copolymerization of 2-hydroxyethyl methacrylate and acrylamide in a molar ratio of 4: 1 according to the method of Preparation Example 2 as a neutralization amount control layer was used. When the diffusion transfer using the image receiving material As carried out in Example 1, practically the same results as in Example 1 were obtained.

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. ., ... ORIGINAL INSPECTED

Example 5

An image receiving material was prepared in the same manner as in Example 1 except that the homopolymer c of 3-hydroxypropyl methacrylate according to the preparation example 3 was used as a neutralization amount control layer. In this case, too, were practically the same Results as obtained in Example 1 when the same diffusion transfer as in Example 1 was carried out.

Example 4

An image receiving material was made in the same manner prepared as in Example 1, but using a copolymer of 2-hydroxyethyl acrylate and 2-hydroxyethyl methacrylate, prepared according to Preparation Example 4 for the degree of neutralization control layer was used. When using the same diffusion transfer as in Example 1 this imaging material was carried out practically the same results as in Example 1 were obtained.

Example 5

An image receiving material was prepared in the same manner as in Example 1 except that a copolymer was used of 2-hydroxyethyl methacrylate and methyl methacrylate according to Preparation Example 5 for the degree of neutralization control layer was used. When diffusion transfer was performed as in Example 1 using this image assumed that it was generally executed, a color image was taken the same color density as in the case of Example 1 was obtained.

Example 6

An image receiving material was prepared in the same manner as in Example 1 except that it was made by polymerization of 2-hydroxyethyl methacrylate in a solution

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Graft polymers obtained from hydroxyethyl cellulose according to Preparation Example 6 were used for the degree of neutralization expensive pushes and the solution of the polymer shortly after the polymerization reaction was applied as it was on the acidic polymer layer in a thickness of 8 microns . When the same diffusion transfer process as in Example 1 was carried out using this image receiving material, practically the same results as in Example 1 were obtained. In the foregoing, the invention has been described in terms of preferred embodiments, without being limited thereto.

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Claims (16)

23Ϊ1207 Claims (iy Image receiving material for the color diffusion transfer process with a neutralization extent control layer, characterized in that this layer has at least one of the following polymers, namely homopolymers, Copolymers and graft polymers of monomethacrylic acid esters of polyhydric alcohols or monoacrylic acid esters of polyhydric alcohols. 2. Image recording material according to claim 1, characterized in that the polymer consists of the homopolymer of the Monomethacrylic acid ester consists of a polyhydric alcohol. 3. Image recording material according to claim 1, characterized in that that the polymer from the copolymer one Monomethacrylic acid ester of a polyhydric alcohol and another vinyl monomer copolymerizable therewith consists. 4. Image recording material according to claim 1, characterized in that that the polymer consists of a graft polymer a monomethacrylic acid ester of a polyhydric alcohol. 5. Image recording material according to claim 1, characterized in that that the polymer consists of the homopolymer of a monoacrylic acid ester of a polyhydric alcohol. 6. Image recording material according to claim 1, characterized in that that the polymer from the copolymer of a monoacrylic acid ester of a polyhydric alcohol and a further therewith copolymerizable vinyl monomers. 7. Image recording material according to claim 1, characterized in that the polymer consists of a graft polymer a monoacrylic acid ester of a polyhydric alcohol. 8. Image recording material according to claim 1 to 7, characterized characterized in that it further contains an acidic polymer layer. 3 0 9 8 3 7/0955 ORIGINAL INSPECTED 9. Image recording material according to claim 8, characterized in that the acidic polymer is at least one Contains carboxyl group, sulfo group or a group hydrolyzable to a carboxyl group. 10. Image recording material according to claim 9, characterized in that the layer of the acidic polymer 5 to 30 microns thick. 11. Image recording material according to claim 1 to 10, characterized in that the polymer consists of a copolymer and the acid ester is at least 50 mol $ of the copolymer. 12. Bildaafnahmematerial according to claim 1 to 11, characterized characterized in that the molecular weight of the copolymer is 10,000 to 60,000. 13. Image recording material according to claim 1 to 12, characterized characterized in that the thickness of the degree of neutralization control layer 3 to 20 microns. 14. Image recording material according to claim 1 to 13 »thereby characterized in that the polyhydric alcohol has 2 to 5 aliphatic hydroxyl groups and 2 to 12 carbon atoms having. 15. Image receiving material for color diffusion transfer process with an image receiving layer made of a poly-4-vinylpyridine-containing polymer and a neutralization extent control polymer layer, characterized in that the degree of neutralization control layer at least one of the polymers, namely homopolymers, copolymers and graft polymers of monomethacrylic acid esters of polyhydric alcohols or monoacrylic acid esters of polyhydric alcohols. 16.Image recording material for the Parb diffusion transfer method, consisting of a carrier with one on it 309837/0955 a) an acidic polymer layer b) a degree of neutralization control layer with at least one homopolymer, copolymer or graft polymer of a monomethacrylic acid ester
of a polyhydric alcohol or monoacryic acid ester of a polyhydric alcohol and c) an image receiving layer containing poly-4-vinylpyridine. 309837/0955