JPH10310682A - Resin composition for image recording and image receiver for image recording - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a resin compsn. for image-receiving layer which is used for forming a distinct image by thermal transfer or ink jet recording. SOLUTION: The resin compsn. comprising an epoxy compd. (A) and a polymer (B) of a polymerizable unsatd. compd. is applied to at least one side of a substrate to form an image-receiving layer. Compd. A may be present as dispersed particles in polymer B, or the compsn. may be a water-base emulsion contg. polymer particles each having a core-shell structure or a microdomain structure consisting of compd. A and polymer B. An example of compd. A is an epoxy resin. The compsn. may further contain a hydrophilic polymer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image recording resin composition useful for forming an image by an image recording method (thermal transfer, ink jet recording, etc.) and an image recording image receiving body using this resin composition. And its manufacturing method.

[0002]

2. Description of the Related Art Various methods are known as image recording methods. Among the image recording methods, in the thermal transfer method, for example, a thermal transfer sheet in which a recording material such as a sublimable dye is supported on a base sheet (for example, a polyester film or the like) and a transfer material that can be dyed with the sublimable dye ( For example, a method has been proposed in which an image-receiving sheet having a dye-receiving layer formed thereon is brought into contact with paper or a plastic film, and various full-color images are formed on the image-receiving sheet by heating. In this method, a thermal head of a printer is used as a heating means, and a large number of color dots of three or four colors are transferred to an image receiving sheet by heating for a very short time, and a full-color image of an original is reproduced by a large number of color dots. ing. The image formed in this manner is a color material used is a dye and is excellent in transparency, so that the obtained image is very clear, has excellent intermediate color reproducibility and gradation, and is a full-color photograph. A high-quality image comparable to an image can be formed.

In the thermal transfer method, not only the configuration of the thermal transfer sheet but also the configuration of an image receiving sheet for forming an image is important. As the heat-sensitive transfer recording image receiving sheet, for example, polyester-based resin, halogen-containing vinyl-based resin such as polyvinyl chloride resin, polycarbonate-based resin, polyvinyl butyral-based resin, acrylic resin, cellulose-based resin,
There is known a sheet in which a dyeing receiving layer is formed using an olefin-based resin, a styrene-based resin, or the like. As a means for improving the dyeability of a sublimable dye to be transferred in such a thermal transfer recording image receiving sheet, a method of forming a dye receiving layer using a resin having good dyeability has been proposed. For example, JP-A-62-211195 discloses an image-receiving sheet for heat-sensitive transfer recording in which an image-receiving layer having a high surface smoothness is formed from a mixture containing an easily dyeable resin such as polyester, epoxy resin and polystyrene and a pigment. Has been proposed. In this method, it is described that the easily dyeable resin may be a water-soluble resin or an emulsion resin.

However, a resin having good dye-dyeing properties has a low softening point. If the resin is used to form a dye-receiving layer of a thermal transfer recording image-receiving sheet, the heat of a thermal head during image formation causes the dye-receiving layer to be heated. And the thermal transfer sheet are fused, a loud peeling sound is generated at the time of peeling, or a problem that the dye layer of the thermal transfer sheet is transferred to the image receiving sheet (so-called abnormal transfer) occurs. Further, as a method for improving the dyeing property of the dye, there are a method of including a plasticizer in the dye receiving layer, a method of improving the diffusibility of the dye during thermal transfer, and the like. However, the formed image bleeds during storage, and the storability of the image is low.

Japanese Patent Application Laid-Open No. 62-222895 discloses that a dyeing layer of a sublimation type thermosensitive recording image receiving material comprises an acrylic polymer, a fluorine-based or silicone-based surface modifier having a graft or block structure or the like. An image receptor containing is disclosed. JP-A-6-24152 discloses a composite polymer in which a dye-receiving layer of a sublimation transfer recording image-receiving body has a core-shell structure formed of a polymer of a polyester resin having at least one polar group and a polymerizable unsaturated compound. It has been proposed to form with an aqueous dispersion. However, it is difficult for these image receivers to improve the color density and the sharpness of an image while improving the releasability from the thermal transfer sheet.

[0006] As described above, when the dyeing property of the dye-receiving layer is improved, the releasability is reduced, and the dyed dye is formed with a resin that is difficult to migrate in the dye-receiving layer to form a receiving layer. If the coloring property is improved, the dyeing property of the dye is low, and an image with high density and high definition cannot be formed.

[0007] Further, even in an ink jet recording system which is excellent in printing quality with low noise, full color printing is possible. In the inkjet recording, a water-based ink is mainly used in terms of safety and recording suitability, and recording is performed by flying small ink droplets from a nozzle toward a recording sheet. For this reason, the recording sheet is required to absorb the ink promptly, to fix the ink so that the aqueous ink does not elute, and to have water resistance such that the ink receiving layer does not dissolve even when water adheres. However, since the ink absorbency, the ink fixing property, and the water resistance are properties that are contradictory, it is difficult to achieve both at a high level.

[0008]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a resin composition for image recording capable of forming a clear and high quality recorded image, an image receiving member for image recording, and a method for producing the same. Another object of the present invention is to provide a thermal transfer method using a sublimable dye, which has excellent releasability (release property) from a thermal transfer sheet in an image forming process or thermal transfer, and can form a high-quality recorded image. An object of the present invention is to provide a resin composition useful for recording, an image receiving body for image recording, and a method for producing the same. Still another object of the present invention is to provide
A resin composition useful for thermal transfer recording, capable of forming a recorded image with high color density and excellent clarity while maintaining a high level of releasability from a thermal transfer sheet, and an image recording image receiving body and production thereof It is to provide a method. Another object of the present invention is to provide a resin composition for an ink receiving layer, which is excellent in ink absorption, ink fixability and water resistance, and is useful for forming a high-quality image by ink jet recording, an image receiving member for image recording, and the same. It is to provide a manufacturing method.

[0009]

Means for Solving the Problems The present inventors have conducted intensive studies to achieve the above object, and as a result, using a resin composition composed of an epoxy compound and a specific polymer,
When a single image receiving layer is formed, in the thermal transfer recording system, it is possible to form a recorded image having high color density and excellent clarity on the image receiving member while having excellent releasability (release property) from the thermal transfer sheet. In the ink jet recording system, it has been found that an image receiving body having high ink absorption, ink fixing property and water resistance can be formed, and the present invention has been completed.
That is, the resin composition of the present invention for forming an image receiving layer for image recording is composed of an epoxy compound (1) and a polymer of a polymerizable unsaturated compound (2). The resin composition may be composed of a polymer (2) and an epoxy compound (1) dispersed in a particle form in the polymer. The resin composition is a water-based polymer emulsion containing polymer particles having a core-shell structure or a microdomain structure composed of an epoxy compound (1) and a polymer (2) of a polymerizable unsaturated compound. You may. The epoxy compound (1) includes, for example, an epoxy resin. The resin composition may further include a hydrophilic polymer. The present invention also includes an image-receiving layer for image recording, wherein the image-receiving layer for image recording is formed of a resin composition composed of an epoxy compound (1) and a polymer (2) of a polymerizable unsaturated compound. It is. The present invention also includes a method for producing an image receiving member for housekeeping recording, wherein the resin composition is applied to at least one surface of a substrate to form an image receiving layer.

In this specification, a layer capable of receiving a colorant and forming an image, for example, the above-mentioned "dye receiving layer"
The “ink receiving layer” may be simply referred to as “image receiving layer” or “receiving layer”. "Acrylic" monomer and "methacrylic"
Monomers are collectively referred to as “(meth) acrylic” monomers. Further, a sublimable dye refers to a dye that sublimates by heat.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION

[Epoxy compound (1)] The epoxy compound (1) includes, for example, glycidyl ether type, glycidyl ester type,
Glycidylamine type, cycloaliphatic type, linear aliphatic type, heterocyclic epoxy resin and the like are included. The epoxy compound (1) may have at least one epoxy group in the molecule, but usually a compound having at least two epoxy groups is used. The epoxy compound (1) can be used alone or in combination of two or more.

Glycidyl ether type epoxy resins include:
Various epoxy resins obtained by reacting a compound having a hydroxyl group with epichlorohydrin are included.
As a glycidyl ether type epoxy resin, for example,
Alkylene glycol diglycidyl ether (for example,
Ethylene glycol diglycidyl ether, trimethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, 1,3-butanediol diglycidyl ether, tetramethylene glycol diglycidyl ether, etc.), polyoxyalkylene glycol diglycidyl ether (for example, diethylene glycol diglycidyl ether) Glycidyl ether, triethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, dipropylene glycol diglycidyl ether, tripropylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, etc.), polyglycidyl ether of aliphatic polyhydric alcohol (for example, Trimethylolpropane triglycidyl ether, glycerin Glycidyl ether, etc.), a bisphenol type epoxy resin (e.g., bisphenol A
Type epoxy resin, bisphenol F type epoxy resin, bisphenol AD type epoxy resin, etc.) and novolak type epoxy resin (for example, phenol novolak type epoxy resin, cresol novolak type epoxy resin, etc.).

Glycidyl ester type epoxy resins include:
Various epoxy resins obtained by the reaction of carboxylic acid and epichlorohydrin, for example, aliphatic polycarboxylic acid polyglycidyl ester (for example, aliphatic dicarboxylic acid such as diglycidyl adipate, diglycidyl sebacate, diglycidyl dimer acid) Acid diglycidyl ester, etc.), aromatic polycarboxylic acid polyglycidyl ester (for example, diglycidyl phthalate, diglycidyl tetrahydrophthalate, diglycidyl hexahydrophthalate, diglycidyl dimethylphthalate, dimethylhexahydrophthalate) Aromatic dicarboxylic acid diglycidyl ester such as acid diglycidyl ester).

As the glycidylamine type epoxy resin, various epoxy resins obtained by reacting a primary amine or a secondary amine with epichlorohydrin, for example, N, N-diglycidylaniline, diglycidyltoluidine, triglycidyl- p-aminophenol, triglycidyl-m-aminophenol, tetraglycidylaminodiphenylmethane, tetraglycidyl metaxylylenediamine, tetraglycidyl-1,3-bis (aminomethyl) cyclohexane, tetraglycidyl-1,4
-Bis (aminomethyl) cyclohexane and the like.

The cycloaliphatic epoxy resin includes, for example,
1-epoxyethyl-3,4-epoxycyclohexane, alicyclic diepoxy acetal, alicyclic diepoxy adipate, and the like. Examples of the heterocyclic epoxy resin include triglycidyl isocyanate and hydantoin type epoxy resin (for example, , Diglycidylhydantoin, diglycidyldimethylhydantoin, etc.).

Preferred epoxy compounds (1) include, for example, glycidyl ether type epoxy resins (for example, bisphenol type epoxy resins such as bisphenol A type epoxy resin) and glycidyl ester type epoxy resins.

[Polymer (2)] Examples of the polymerizable unsaturated compound for forming the polymer (2) include (meth) acrylic monomers, aromatic vinyls, unsaturated carboxylic acids, and unsaturated carboxylic acids. Saturated sulfonic acids, vinyl esters, halogen-containing vinyls, vinyl ethers (for example, vinyl ethyl ether), vinyl ketones (for example, methyl vinyl ketone), vinyl heterocyclic compounds (for example, N-
N- such as vinylpyrrolidone and N-vinylimidazole
Vinyl compounds, vinylpyridines, etc.), olefinic monomers (eg, ethylene, propylene, etc.), allyl compounds (eg, allyl esters such as allyl acetate, etc.), monomers having a hydrolyzable silyl group, and the like. . The polymerizable unsaturated compounds can be used alone or in combination of two or more.

The (meth) acrylic monomer includes, for example,
(Meth) acrylates, (meth) acrylamides,
(Meth) acrylonitrile and the like are included. (Meth) acrylate includes, for example, alkyl (meth) acrylate [for example, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, isopropyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate. ) Acrylate, t-butyl (meth) acrylate, hexyl (meth) acrylate, octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, _C1-18 alkyl (meth) acrylate such as lauryl (meth) acrylate, etc.),
Cycloalkyl (meth) acrylate [eg, cyclohexyl (meth) acrylate, etc.], aryl (meth) acrylate [eg, phenyl (meth) acrylate, etc.], aralkyl (meth) acrylate [eg, benzyl (meth) acrylate, etc.], hydroxy Alkyl (meth) acrylate [for example, hydroxy- _C2-4 alkyl (meth) acrylate such as 2-hydroxyethyl, 2-hydroxypropyl (meth) acrylate], glycidyl (meth) acrylate, dialkylamino-alkyl (meth) Acrylate [for example,
2- (dimethylamino) ethyl (meth) acrylate,
Di C _1-4 alkylamino-C _2-4 alkyl (meth) such as 2- (diethylamino) ethyl (meth) acrylate
Acrylate and the like].

(Meth) acrylamides include, for example,
(Meth) acrylamide, hydroxyalkyl (meth)
Acrylamide [for example, N-hydroxy-C _1-4 alkyl (meth) acrylamide such as N-methylol (meth) acrylamide], alkoxyalkyl (meth) acrylamide [for example N-methoxymethyl (meth) acrylamide or other N- C _1-4 alkoxy-C
_1-4 alkyl (meth) acrylamide, etc.], diacetone (meth) acrylamide, etc.

Preferred (meth) acrylic monomers include:
For example, (meth) acrylate [eg, C _1-18 alkyl (meth) acrylate, hydroxy-C _2-4 alkyl (meth) acrylate, glycidyl (meth) acrylate, di C _1-4 alkylamino-C _2-4 alkyl (Meta)
Acrylate etc.], (meth) acrylamides and the like. More preferably, C _2-10 alkyl acrylate, C _1-6 methacrylate, hydroxy-C _2-3 alkyl (meth) acrylate, glycidyl (meth) acrylate, di C _1-3 alkylamino-C _2-3 alkyl (meth) Acrylates are included.

The monomers having a hydrolyzable silyl group include:
(Meth) acrylic monomers and monomers having an alkenyl group such as a vinyl group are included. As the (meth) acrylic monomer having a hydrolyzable silyl group, for example,
2- (meth) acryloxyethyltrichlorosilane, 3
-(Meth) acryloxypropyltrichlorosilane, 2
-(Meth) acryloxyethylmethyldichlorosilane,
2- (meth) acryloxyethyldimethylchlorosilane, 2- (meth) acryloxyethyltrimethoxysilane, 2- (meth) acryloxyethyltriethoxysilane, 3- (meth) acryloxypropyltrimethoxysilane, 3- ( (Meth) acryloxypropyltriethoxysilane, 3- (meth) acryloxypropyltris (2
-Methoxyethoxy) silane and the like.

Examples of the monomer having a hydrolyzable silyl group and an alkenyl group such as a vinyl group include vinyltrichlorosilane, vinylmethyldichlorosilane, isopropenyltrichlorosilane, and isopropenyldimethylchlorosilane; Vinyltriethoxysilane, vinyldimethoxymethylsilane, vinyldiethoxymethylsilane, isopropenyltrimethoxysilane, isopropenyltriethoxysilane, vinyltris (2-methoxyethoxy) silane, etc .; allyltrichlorosilane, allylmethyldichlorosilane, etc .; allyltrichlorosilane Methoxysilane, vinylphenyltrimethoxysilane, isopropenylphenyltrimethoxysilane, etc .; 3- [2- (allyloxycarbonyl) phenylcarbonyloxy] B pills trimethoxysilane, 3-
[2- (isopropenylmethyloxycarbonyl) phenylcarbonyloxy] propyltrimethoxysilane and the like; 3- (vinylphenylamino) propyltrimethoxysilane, 3- (vinylphenylamino) propyltriethoxysilane and the like; 3- [2- (N-vinylphenylmethylamino) ethylamino] propyltrimethoxysilane, 3- [2- (N-isopropenylphenylmethylamino) ethylamino] propyltriethoxysilane and the like; 2- (vinyloxy) ethyltrimethoxysilane,
3- (vinyloxy) propyltrimethoxysilane, 4
-(Vinyloxy) butyltriethoxysilane, 2-
(Isopropenyloxy) ethyltrimethoxysilane and the like; 3- (allyloxy) propyltrimethoxysilane, 10- (allyloxycarbonyl) decyltrimethoxysilane, 3- (isopropenylmethoxy) propyltrimethoxysilane and the like; 3-[( (Meth) acryloxyethoxy] propyltrimethoxysilane, 3-[(meth) acryloxyethoxy] propyldimethoxymethylsilane, etc .; divinyldimethoxysilane, divinyldiethoxysilane, divinyldi (β-methoxyethoxy) silane, and the like. .

The unsaturated carboxylic acids include, for example, unsaturated monocarboxylic acids [eg, ethylenically unsaturated monocarboxylic acids such as (meth) acrylic acid and crotonic acid], and unsaturated polycarboxylic acids [eg, maleic acid]. Acid, fumaric acid,
Ethylenically unsaturated polycarboxylic acids such as itaconic acid and its anhydrides (such as maleic anhydride) or esters (for example, monoalkyl esters of divalent carboxylic acids such as monomethyl maleate and monobutyl maleate)] And so on. Preferred unsaturated carboxylic acids include, for example, monocarboxylic acids such as (meth) acrylic acid, polycarboxylic acids such as maleic acid, and acid anhydrides or esters thereof. Examples of the unsaturated sulfonic acids include vinyl sulfonic acids such as styrene sulfonic acid.

The aromatic vinyls include, for example, styrene,
α-methylstyrene, vinyltoluene and the like are included, and styrene is often used. Vinyl esters include, for example, vinyl acetate, vinyl propionate, vinyl versatate (VeoVa and the like), and the like. Halogen-containing vinyls include, for example, vinyl chloride, vinylidene chloride, and the like.

The ratio of the epoxy compound (1) to the polymer (2) is in a range that does not impair the releasability, color density, sharpness, etc., for example, the former / the latter = 0.5 / 99.5 to 70/3.
0 (% by weight) [for example, 0.5 / 99.5 to 50/50]
(% By weight)]. A preferable ratio is, for example, the former / the latter = 0.5 / 99.5 to 40/6.
0 (% by weight) [for example, 0.5 / 99.5 to 30/70]
(% By weight)], and more preferably 1/99 to 20/80.
(% By weight) [for example, about 1/99 to 15/85 (% by weight)], particularly about 2/98 to 10/90 (% by weight).

The resin composition may be a mixture of the epoxy compound (1) and the polymer (2), but one of the epoxy compound (1) and the polymer (2) is used as the other component. It is preferable to have a form in which the epoxy compound (1) is dispersed in a particle form in the polymer (2) as a matrix, particularly in a polymer (2) as a matrix. The average particle diameter of the particulate epoxy compound (1) is, for example, 0.001 to 5 μm.
(For example, 0.005 to 2 μm), preferably 0.01
To 2 μm (for example, 0.01 to 1.5 μm), and more preferably about 0.01 to 1 μm.

The resin composition in which one of the components is dispersed (particularly, the resin composition in which the epoxy compound (1) is dispersed in the form of particles) can be obtained while maintaining the epoxy compound (1) in the form of particles. It may be prepared by mixing with the coalescence (2). Preferable preparation methods include, for example, a method of mixing an emulsion of the epoxy compound (1) and an emulsion of the polymer (2), and a method of polymerizing in the presence of an emulsion containing polymer particles composed of the epoxy compound (1). Examples of the method include emulsion polymerization of an unsaturated compound. This emulsion polymerization may be seed polymerization using the polymer particles containing the epoxy compound (1) as seeds. The polymer particles containing the epoxy compound (1) may be composed of not only the epoxy compound (1) but also the epoxy compound (1) and the polymer (2).

The emulsion polymerization can be carried out according to a conventional emulsion polymerization method. Emulsion polymerization is, for example, a method in which a mixed solution of (a) an epoxy compound (1) and a polymerizable unsaturated compound is emulsion-polymerized; Emulsion polymerization of an unsaturated compound or a mixed solution of a polymerizable unsaturated compound and an epoxy compound (1) can be performed. The mixed solution of the epoxy compound (1) and the polymerizable unsaturated compound or the polymerizable unsaturated compound may be used as a pre-emulsified emulsion. The mixed solution and the polymerizable unsaturated compound may be charged all at once and polymerized, or may be partially charged and the remaining portion added for polymerization. The mixed solution or the polymerizable unsaturated compound is added dropwise to the emulsion polymerization system,
They may be added continuously or intermittently. In the emulsion polymerization, a method combining these methods may be employed.

In the emulsion polymerization, a conventional method such as a multi-stage polymerization method may be employed. Multi-stage polymerization, for example, in the presence of polymer particles containing at least an epoxy compound (1), or polymer particles formed by emulsion polymerization of a mixed solution of the epoxy compound (1) and a polymerizable unsaturated compound,
Emulsion polymerization can be carried out continuously or intermittently by adding a polymerizable unsaturated compound or a mixed solution of the epoxy compound (1) and the polymerizable unsaturated compound.
In this method, the composition of the polymerizable unsaturated compound or the mixed solution to be added may be different between an early stage and a late stage of the emulsion polymerization step. In the mixed solution to be added, the ratio of the polymerizable unsaturated compound is higher in the latter stage than in the initial stage, and usually, the latter is a polymerizable unsaturated compound. In addition, the epoxy compound (1) and the compound having an unsaturated carboxylic acid or an amino group among the polymerizable unsaturated compounds may be allowed to coexist in an emulsion polymerization system. Is more advantageous. Therefore, when using a compound having an unsaturated carboxylic acid or an amino group as a polymerizable unsaturated compound to perform multi-stage polymerization,
Particles containing the epoxy compound (1) are generated at the early stage of emulsion polymerization, and the polymerizable unsaturated compound containing an unsaturated carboxylic acid or a compound having an amino group is often polymerized at a later stage of emulsion polymerization.

The emulsion polymerization can be carried out using a polymerization initiator. Examples of the polymerization initiator include potassium persulfate, sodium persulfate, persulfates such as ammonium persulfate, and water-soluble polymerization initiators such as hydrogen peroxide, and may constitute a water-soluble Resox-type polymerization initiator system. Good. Further, in order to adjust the molecular weight of the polymer (2), a chain transfer agent, for example, an alcohol such as catechol, a thiol, or a mercaptan may be used. The polymerization temperature is, for example, about 40 to 100 ° C, preferably about 50 to 90 ° C, and more preferably about 60 to 80 ° C, depending on the type of the polymerization initiator.

When preparing an emulsion (for example, an emulsion of the epoxy compound (1) or the like) or emulsion polymerization, an emulsifier, for example, an anionic surfactant (for example,
Sodium dodecylbenzenesulfonate, sodium alkyldiphenylether disulfonate, sodium alkylnaphthalenesulfonate, sodium lauryl sulfate, sodium polyoxyethylene alkyl ether sulfate, sodium polyoxyethylene alkylphenyl ether sulfate, sodium dialkylsulfosuccinate), nonionic surfactant Surfactants (eg, polyoxyethylene lauryl ether, polyoxyethylene oleyl phenyl ether, polyoxyethylene nonyl phenyl ether, oxyethylene / oxypropylene block copolymer, etc.) and protective colloids such as polyvinyl alcohol and water-soluble polymers. Can be used. The amount of the emulsifier used is, for example, 0.1 to the total amount of the epoxy compound (1) and the polymerizable unsaturated compound.
-20% by weight, preferably 0.5-10% by weight. More preferably, it is about 1 to 8% by weight.

When the polymer contains a cationic group such as an amino group, an imide group or a cation-forming group,
A salt may be formed with an acid, or a fourth salt may be formed with an alkylating agent.
A secondary ammonium salt may be formed. Such acids include, for example, inorganic acids (eg, hydrochloric acid, phosphoric acid, sulfuric acid,
Nitric acid etc.), organic acids [for example, saturated aliphatic monocarboxylic acids such as formic acid, acetic acid and propionic acid; saturated aliphatic polycarboxylic acids such as oxalic acid and adipic acid; unsaturated aliphatic monocarboxylic acids such as (meth) acrylic acid Carboxylic acid; maleic acid,
Unsaturated aliphatic polycarboxylic acids such as itaconic acid; lactic acid,
Aliphatic oxycarboxylic acid such as citric acid)]. Examples of the alkylating agent include alkyl halides such as methyl chloride, ethyl chloride, methyl bromide and ethyl bromide, aralkyl halides such as benzyl chloride, haloacetic esters such as methyl monochloroacetate and ethyl monochloroacetate, epichlorohydrin, Examples thereof include dimethyl sulfate, diethyl sulfate, and ethylene oxide.

When the polymer has an acidic group such as a carboxyl group, an organic base (an alkylamine such as triethylamine, a cyclic amine such as morpholine, an alkanolamine such as triethanolamine, pyridine, etc.) or an inorganic base (such as ammonia, An alkali metal hydroxide) may be used to form a salt.

The amount of the acid or alkylating agent used is, for example, acid / cationic group = 0.
3/1 to l. It can be selected from a range of about 5/1 (molar ratio). The amount of the base used is, for example, base / acid group = 0.3 / 1 to 1: 1 based on the total moles of the acid group. It can be selected from a range of about 5/1 (molar ratio).

The polymer particles in the resin composition (aqueous polymer emulsion) obtained by emulsion polymerization may have a homogenous structure or a heterophasic structure (eg, a core-shell structure, a microdomain structure, etc.). Good. core·
As for the shell structure, the core layer consists of an epoxy compound (1),
The shell layer is often a polymer (2). The average particle size of the polymer particles is in a range that does not impair the dispersion stability, adhesion, and the like, for example, 0.01 to 5 μm (for example, 0.01 to 5 μm).
To 1 μm), preferably 0.01 to 2 μm, and more preferably about 0.01 to 1 μm.

The pH of the emulsion may be adjusted. The pH may be, for example, 5 or more (for example, 5 to 10), preferably about 6 to 9 in a neutral to weakly alkaline region.

When the resin composition of the present invention is applied to an image receiving layer for forming an image with an aqueous recording agent (such as an aqueous ink used for ink jet recording), the resin composition comprising the epoxy compound and the polymer When combined with a hydrophilic polymer, the ink absorptivity can be improved while maintaining the ink fixing property and water resistance at high levels.

Examples of the hydrophilic polymer include a hydrophilic natural polymer or a derivative thereof (starch, corn starch, sodium alginate, gum arabic, gelatin, casein, dextrin, etc.), and a cellulose derivative (methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, carboxy). Methylcellulose, cellulose sulfate, cyanoethylcellulose, etc.), vinyl alcohol-based polymer (polyvinyl alcohol, ethylene-vinyl alcohol copolymer, etc.), ethylene-based polymer (ethylene-maleic anhydride copolymer, etc.), vinyl acetate-based copolymer Polymers (eg, vinyl acetate-methyl acrylate copolymer), polyalkylene oxides (eg, polyethylene oxide, ethylene oxide-propylene oxide block copolymer), Bokishiru polymer or a salt thereof with a group or a sulfonic acid group [acrylic polymers (poly (meth) acrylic acid or its salts (ammonium, alkali metal salts such as sodium), methyl methacrylate -
(Meth) acrylic acid copolymers, acrylic acid-polyvinyl alcohol copolymers, etc.), vinyl ether polymers (polyvinyl alkyl ethers such as polyvinyl methyl ether and polyvinyl isobutyl ether, methyl vinyl ether-maleic anhydride copolymers, etc.), Styrene-based polymers (styrene-maleic anhydride copolymer, styrene- (meth) acrylic acid copolymer, sodium polystyrenesulfonate, etc.), sodium polyvinylsulfonate, etc.], nitrogen-containing polymers (or cationic polymers)
Or a salt thereof (polyvinyl benzyl trimethyl ammonium chloride, quaternary ammonium salts such as polydiallyldimethylammonium chloride, polydiene C _1-4 alkylamino ethyl (meth) acrylate hydrochloride, polyvinylpyridine, polyvinyl imidazole, polyethylene imine, polyamide polyamine, poly Acrylamide, polyvinylpyrrolidone, etc.). These hydrophilic polymers can be used alone or in combination of two or more. Among these hydrophilic polymers, preferred are cellulose derivatives (especially hydroxyethylcellulose), vinyl alcohol polymers (especially polyvinyl alcohol), vinyl polymers (especially vinyl acetate copolymer), polyvinylpyrrolidone, and the like. .

The vinyl acetate copolymer is a copolymer of vinyl acetate and another copolymerizable monomer, and is partially saponified (for example, a partially saponified product having a degree of saponification of about 10 to 90%). Is also included. Preferred copolymerizable monomers include hydrophilic monomers having a hydrophilic group (for example, a carboxyl group, a sulfonic acid group or a salt thereof, a hydroxyl group, an ether group, etc.). In particular, a vinyl monomer having an ether group, especially an oxyalkylene unit, for example, an alkylene oxide unit (addition mole) of 1
-100, preferably 2-80 (e.g. 5-80),
More preferably, about 5 to 70 (for example, 10 to 50) (meth) acrylic acid ester or allyl ether can be used. Preferred vinyl monomers having an oxyalkylene unit include, for example, (meth) acrylates which are vinyl monomers in which the oxyalkylene unit is an oxyethylene unit, particularly polyoxyalkylene (meth) allyl ether (among others, polyoxyethylene allyl ether) ) Is included.

In the vinyl acetate copolymer, the proportion of the copolymerizable monomer can be selected within a range that does not impair the sharpness of the image and the water resistance.
It is about 50 mol%, preferably about 1 to 30 mol%, and more preferably about 2.5 to 25 mol% (for example, about 3 to 20 mol%). A copolymer of vinyl acetate and a vinyl monomer having a polyoxyalkylene unit (modified vinyl acetate resin) can be obtained, for example, from Nippon Synthetic Chemical Co., Ltd. under the trade name “OKS-7158G”.

The resin composition comprising the epoxy compound and the polymer is a reactive group (for example, the epoxy group,
When the resin composition has a hydrolyzable silyl group, it is preferable to use a hydrophilic polymer having a reactive functional group (such as a hydroxyl group, a carboxyl group, or an amino group) with respect to the resin composition. Preferred examples of the hydrophilic polymer include the following polymers. 1. Acetoacetyl group-modified hydrophilic polymer The acetoacetyl group-modified hydrophilic polymer includes, for example, an acetoacetyl group-containing hydrophilic polymer generated by a reaction between a hydrophilic polymer having a hydroxyl group and an acetoacetate ester, for example, Also included are acetoacetyl group-modified vinyl acetate copolymers (acetoacetyl group-containing polyvinyl alcohol, acetoacetyl group-containing cellulose derivatives, etc.). An acetoacetyl group-modified vinyl acetate copolymer, for example, available from Nippon Synthetic Chemical Industry Co., Ltd.

2. Carboxyl group-modified hydrophilic polymer (2a) Carboxyl group-modified polyvinyl alcohol, for example, vinyl ester (vinyl acetate, vinyl propionate, vinyl formate, etc.) and carboxyl group-containing unsaturated monomer (such as (meth) acrylic acid) Partially saponified copolymers with carboxylic acids, maleic acid, fumaric acid, dicarboxylic acids such as itaconic acid, or anhydrides or monoalkyl esters thereof. Such a carboxyl group-modified polyvinyl alcohol can be obtained, for example, from Kuraray Co., Ltd. Carboxyl group-modified hydrophilic polymers include:
For example, styrene- (meth) acrylic acid copolymer, (meth) acrylic acid ester- (meth) acrylic acid copolymer (such as methyl methacrylate- (meth) acrylic acid copolymer), vinyl acetate- (meth) An acrylic acid copolymer is also included. (2b) Carboxyl group-containing polysaccharides, for example, carboxy C _1-4 alkyl cellulose, carboxymethyl dextran, alginic acid and the like.

3. Acid anhydride group-containing hydrophilic polymer alkyl vinyl ether-maleic anhydride copolymer (methyl vinyl ether-maleic anhydride copolymer, etc.),
Ethylene-maleic anhydride copolymer, vinyl acetate-maleic anhydride copolymer, styrene-maleic anhydride copolymer, (meth) acrylate-maleic anhydride copolymer (methyl methacrylate-maleic anhydride copolymer) 3. Polymer etc.) Amino group-containing hydrophilic polymer polyamide-polyamine, polyvinylamine, poly (N
-Vinyl formamide), amino group-containing polysaccharides (aminodextran, chitosan, etc.).

The ratio of the resin composition composed of the epoxy compound and the polymer to the hydrophilic polymer may be in a range that does not impair the water resistance, ink absorbency, etc., for example, the former / latter = 5/95 to 100/0 (% by weight),
Preferably, it can be selected from the range of about 10/90 to 90/10 (% by weight), more preferably about 20/80 to 80/20 (% by weight), and is usually 10/90 to 50/50 (% by weight), particularly It is about 20/80 to 40/60 (% by weight).

The image receiving layer (especially, an image receiving layer for forming an image with an aqueous recording agent) may contain a powder (eg, a pigment). Examples of the powders include inorganic powders (white carbon, particulate calcium silicate, zeolite, magnesium aminosilicate, calcined silica, particulate magnesium carbonate, particulate alumina, silica, talc, kaolin, delamikaolin, Clay, heavy calcium carbonate, light calcium carbonate, magnesium carbonate, titanium dioxide,
Aluminum hydroxide, calcium hydroxide, magnesium hydroxide, magnesium silicate, calcium sulfate, mineral powder such as sericite, bentonite, smectite, etc.), organic powder (polystyrene resin, acrylic resin,
Crosslinked or non-crosslinked organic fine particles such as urea resin, melamine resin, and benzoguanamine resin, and organic powders such as fine hollow particles). One or more of these powders may be appropriately selected and used together. Powders and binder resin (total amount of the resin composition and hydrophilic polymer)
Is, for example, 5 to 80 parts by weight, preferably about 10 to 60 parts by weight, based on 100 parts by weight of the granular material. Further, in order to improve the fixability of the colorant (dye), a dye fixing agent such as a dicyan compound (dicyandiamide-formalin polycondensate, dicyandiamide-diethylenetriamine polycondensate), a polyamine compound (diethylenetriamine, triethylenetetramine) is used. , Dipropylenetriamine, aliphatic polyamines such as polyallylamine, aromatic polyamines such as phenylenediamine, etc.), polycationic compounds (epichlorohydrin-dimethylamine addition polymer, diallyldimethylammonium salt-sulfur dioxide copolymer, diallyldimethylammonium) Salt-diallylamine hydrochloride derivative copolymer, diallylamine salt-sulfur dioxide copolymer, diallylmethylamine salt polymer, diallyldimethylammonium salt polymer, allylamine Of the polymer, dialkyl aminoethyl (meth) acrylate quaternary salt polymer, a diallyl dimethyl ammonium salt - acrylamide copolymer) or the like may be added. The amount of the dye fixing agent used is within a range capable of improving the fixing property, for example, in terms of solid content, 0.1 to 40 parts by weight, preferably 100 parts by weight, based on 100 parts by weight of the resin composition composed of the epoxy compound and the polymer. Is about 1 to 30 parts by weight, more preferably about 2 to 20 parts by weight.

The resin composition of the present invention may contain, for example, an antifoaming agent, a coating improver, a thickener, a fluororesin, a silicone resin in order to improve the releasability during thermal transfer and the weather resistance of a recorded image. Lubricants (lubricants) such as resins, organic sulfonate compounds, organic phosphate compounds, and organic carboxylate compounds, stabilizers such as antioxidants, ultraviolet absorbers, heat stabilizers, antiblocking agents, and radical scavengers Agents, quenchers, antistatic agents,
Additives such as plasticizers, thickeners and defoamers may be added.

[Image receiving member for image recording] As a base material of the image receiving member (recording sheet), for example, natural paper, synthetic paper (for example, polypropylene-based, polystyrene-based, polyester-based synthetic paper, etc.), plastic film (for example, Or a polyester film such as a polyethylene terephthalate film), or a laminate thereof. Preferred substrates include synthetic papers and plastic films. The thickness of the substrate can be selected from the range of, for example, about 5 to 500 μm, preferably about 10 to 300 μm, and more preferably about 50 to 200 μm, depending on the use. For substrates, especially synthetic paper and plastic films,
If necessary, for example, stabilizers such as antioxidants, ultraviolet absorbers, and heat stabilizers, and additives such as lubricants, antistatic agents, and pigments may be added.

The image receiving body is provided on at least one surface of the substrate.
An image receiving layer (receiving layer) containing the resin composition is provided.
This image receiving layer can be formed by applying a coating solution containing a resin composition to a substrate and drying (or drying by heating).
This coating solution is prepared by adding a resin composition to a suitable solvent (for example,
Water, an aqueous or non-aqueous organic solvent, or a mixed solvent thereof). When the resin composition is an aqueous emulsion, the coating solution is aqueous. As a method for applying the coating solution, a conventional method, for example, a roll coating method such as gravure or reverse, a doctor knife method, a knife coating method, a nozzle coating method, and the like can be adopted.

The image receiving layer of the image receiving body may be a single layer or a plurality of layers, and is usually a single layer. The thickness of the image receiving layer is, for example, 0.1 μm or more (for example, 0.1 to 50 μm), preferably 0.5 μm, depending on the base material and the purpose of use.
It can be selected from the range described above (for example, 0.5 to 40 μm), and more preferably about 1 to 30 μm. When an image is formed with an aqueous recording agent, the thickness of the image receiving layer is, for example, about 5 to 50 μm, preferably about 10 to 30 μm, and usually about 5 to 30 μm. In addition, a porous layer, an anti-blocking layer, a lubricating layer, an antistatic layer, and the like may be formed on the image receiving layer, if necessary. The image receiving body (recording sheet) of the invention is useful for forming an image using various recording agents. It is particularly useful as a thermal transfer recording image receiver used in combination with a thermal transfer sheet containing a sublimable dye. The image receiving body for thermal transfer is a thermal transfer method, for example, by contacting the image receiving body with a thermal transfer sheet containing a sublimable dye that sublimates by heating, and heating using a thermal head or the like, thereby dyeing the thermal transfer sheet. The image can be transferred to the image receiving body to form an image on the image receiving body. When the image receiving body of the present invention is used, it is possible to form a recorded image having excellent releasability from a thermal transfer sheet containing a sublimable dye, high color density, and excellent clarity in thermal transfer. The image receiving member (recording sheet) of the present invention has high ink absorption, ink fixing property, and water resistance, and is an ink jet type image receiving member (recording sheet) that records a clear image by flying small ink droplets. Is also useful. The image receiving body of the present invention is a sheet for printing such as offset printing and flexographic printing (particularly a sheet for aqueous ink).
It can also be used as such.

[0050]

The resin composition of the present invention is composed of the epoxy compound (1) and the polymer (2). Therefore, when the image receiving body formed of the resin composition is used, clear and high quality can be obtained. Can be formed. Further, when applied to a thermal transfer method using a sublimable dye, a high-quality recorded image having excellent releasability (release property) from a thermal transfer sheet in an image forming process or thermal transfer can be formed. Further, it is possible to form a recorded image having a high color density and excellent clarity while maintaining the releasability from the thermal transfer sheet at a high level. Furthermore, ink absorption, ink fixability and water resistance are high,
By applying to the ink receiving layer, a high quality image can be formed by an ink jet recording method.

[0051]

The present invention will be described below in more detail with reference to Examples, but the present invention is not limited to these Examples. Example 1 (Preparation of Acrylic Epoxy Emulsion) In a 1 liter reaction vessel equipped with a stirrer, a condenser (reflux cooler), a dropping funnel, and a thermometer, 360 g of deionized water and a surfactant (Emulgen, manufactured by Kao Corporation) 935) 17 g,
223 g of butyl acrylate (BA), 214 g of methyl methacrylate (MMA) and an epoxy compound (Epicoat 828, manufactured by Yuka Shell Epoxy Co., Ltd.)
20 wt% of the 45 g of the mixture was charged and heated to 70 ° C. with stirring. The remaining 80% by weight of the mixture and 2.8 g of potassium persulfate were added dropwise to the reaction system over 2 hours. After maintaining the reaction for another 2 hours, the reaction was terminated by cooling to room temperature to obtain an emulsion.

In a 1 liter reactor equipped with a stirrer, a condenser, a dropping funnel and a thermometer, put the emulsion 1
40 g, 266 g of ion-exchanged water and 5 g of a surfactant (Emulgen 931 manufactured by Kao Corporation) were charged and heated to 70 ° C. with stirring. BA 26g, styrene
38 g, diethylaminoethyl methacrylate 1.5
g and 1 g of acrylic acid and 0.5 g of potassium persulfate were added dropwise to the reaction system over 2 hours. After keeping the reaction for 2 hours, the mixture was cooled to room temperature to obtain a polymer emulsion (hereinafter sometimes referred to as an acrylic epoxy emulsion). The properties of the acrylic epoxy-based emulsion were a solid content concentration of 30% by weight, a pH of 4.7, and a viscosity of 5.8 cps (30 ° C.). Ammonia was added to this polymer emulsion to adjust the pH to 8.0.

(Preparation of Thermal Transfer Recording Image Receiver) The acrylic epoxy-based emulsion was coated with a 150 μm-thick polypropylene synthetic paper (Yopo FP manufactured by Oji Oil Chemicals, Ltd.).
G-150) using a wire bar to form a 10 μm dry coating film, and drying at 110 ° C. for 10 minutes to obtain a thermal transfer recording image receiver having a dye receiving layer. Was.

(Evaluation of Printed Image Density) A sublimation type digital color printer DPP-M1 was mounted on an image receiving body (image receiving sheet).
The image was printed using (manufactured by Sony Corporation) and the color density was measured with a reflection type Macbeth densitometer RD-1255 (manufactured by Sakata Inx). The ink ribbon used was a print pack VPM-P50STA dedicated to DPP-M1. The printing conditions were set to the standard settings of a printer driver (manufactured by Sony Corporation) for Macintosh (manufactured by Apple Inc.).

As a result, the color density was 6.7 (the sum of the maximum values of the reflection densities of the cyan, magenta, yellow, and black colors), indicating high color developability.

(Evaluation of Releasability) When the releasability of the ink ribbon and the image receiving sheet during printing was visually observed, no fusion was observed, and high releasability was exhibited.

Example 2 (1) Recording Sheet A 83.3 parts by weight (solid content: 25 parts by weight) of the acrylic epoxy emulsion obtained in Example 1 and a vinyl acetate-based copolymer modified with an acetoacetyl group (Japan) An aqueous coating solution was prepared by mixing 750 parts by weight (solid content: 75 parts by weight) of a 10% by weight aqueous solution of Synthetic Chemical Industry Co., Ltd., Z-320). The aqueous coating solution is applied to a 100 μm-thick easily-adhesive-treated polyethylene terephthalate film (manufactured by ICI Japan K.K., Melinex 705; hereinafter sometimes simply referred to as a PET film) and dried at 100 ° C. for 3 minutes. As a result, an ink absorbing layer having a thickness of 15 μm was formed, and a recording sheet A was obtained.

(2) Recording sheet B 83.3 parts by weight (solid content: 25 parts by weight) of the acrylic epoxy emulsion obtained in Example 1 and a modified vinyl acetate-based copolymer (Nippon Synthetic Chemical Industry Co., Ltd.) ), OKS-
7158G) and 500 parts by weight of a 15% by weight aqueous solution (75 parts by weight of solid content) to prepare an aqueous coating liquid. PE
Apply the aqueous coating solution to a T film,
After drying for 15 minutes, an ink absorbing layer having a thickness of 15 μm was formed, and a recording sheet B was obtained.

(3) Recording Sheet C 83.3 parts by weight (solids content: 25 parts by weight) of the acrylic epoxy emulsion obtained in Example 1 and 10 parts by weight of polyvinylpyrrolidone (weight average molecular weight: 36 × 10 ⁴ ) % Aqueous solution (750 parts by weight solid content: 75 parts by weight) to prepare an aqueous coating solution. The aqueous coating solution was applied to a PET film, and dried at 100 ° C. for 3 minutes to form an ink absorbing layer having a thickness of 15 μm, thereby obtaining a recording sheet C.

(4) Recording Sheet D 83.3 parts by weight (solid content: 25 parts by weight) of the acrylic epoxy emulsion obtained in Example 1 and a modified vinyl acetate-based copolymer (Nippon Synthetic Chemical Industry Co., Ltd.) ), OKS-
7158G) (500 parts by weight (solid content: 75 parts by weight)) and a dye fixing agent (manufactured by Sanyo Chemical Industries, Ltd.)
10 parts by weight of Sunfix PAC700) to prepare an aqueous coating solution. The aqueous coating solution was applied to a PET film, and dried at 100 ° C. for 3 minutes to form an ink absorbing layer having a thickness of 15 μm. Thus, a recording sheet D was obtained.

Comparative Example 1 (1) Acrylic copolymer emulsion A deionized water was placed in a 2 liter reaction vessel equipped with a stirrer, a reflux condenser, a dropping funnel, a nitrogen inlet tube and a thermometer.
9 g was added, 0.75 g of polyoxyethylene nonylphenyl ether and 2.8 g of sodium alkyldiphenyl ether sulfonate were added, and the mixture was thoroughly stirred until the contents were completely dissolved. As monomer components, methyl methacrylate 60 g, n-butyl acrylate 6
After adding 0 g and heating to 50 ° C., 0.3 g of potassium persulfate was added to initiate a polymerization reaction. After reacting for 2 hours, 0.3 g of potassium persulfate was further added and reacted for 3 hours, thereby completing the polymerization reaction and obtaining an acrylic copolymer emulsion (solid content concentration: 16.8).
weight%).

(2) Recording Sheet A 148.8 parts by weight (solid content: 25 parts by weight) of the acrylic copolymer emulsion obtained in the above step (1) and an acetoacetyl group-modified vinyl acetate copolymer ( An aqueous coating solution was prepared by mixing 750 parts by weight (solid content: 75 parts by weight) of a 10% by weight aqueous solution of Nippon Synthetic Chemical Industry Co., Ltd., Z-320). Applying the aqueous coating solution to a PET film,
By drying at 100 ° C. for 3 minutes, an ink absorbing layer having a thickness of 15 μm was formed, and a recording sheet A was obtained.

(3) Recording sheet B 148.8 parts by weight (solid content: 25 parts by weight) of the acrylic copolymer emulsion obtained in the above step (1) and a modified vinyl acetate-based copolymer (Nippon Synthetic Chemical Co., Ltd.) Industrial Co., Ltd., OK
S-7158G) was mixed with 500 parts by weight of a 15% by weight aqueous solution (75 parts by weight of solid content) to prepare an aqueous coating liquid.
Apply the aqueous coating solution to a PET film,
By drying for 3 minutes at, an ink absorbing layer having a thickness of 15 μm was formed, and a recording sheet B was obtained.

(4) Recording Sheet C 148.8 parts by weight (solid content: 25 parts by weight) of the acrylic copolymer emulsion obtained in the above step (1) and polyvinylpyrrolidone (weight average molecular weight: 36 × 10 ⁴ ) Of 10
An aqueous coating liquid was prepared by mixing 750 parts by weight of a 75% by weight aqueous solution (75 parts by weight of solid content). The aqueous coating solution was applied to a PET film, and dried at 100 ° C. for 3 minutes to form an ink absorbing layer having a thickness of 15 μm, thereby obtaining a recording sheet C.

Comparative Example 2 Modified vinyl acetate copolymer (Nippon Synthetic Chemical Industry Co., Ltd.)
15% by weight of OKS-7158G)
A 15 μm thick ink absorbing layer was formed by applying the film to the film and drying at 100 ° C. for 3 minutes to obtain a recording sheet.

Comparative Example 3 A 10% by weight aqueous solution of an acetoacetyl group-modified vinyl acetate copolymer (Z-320, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) was applied to a PET film and dried at 100 ° C. for 3 minutes. As a result, an ink absorbing layer having a thickness of 15 μm was formed, and a recording sheet was obtained.

Comparative Example 4 Polyvinylpyrrolidone (weight average molecular weight 36 × 10 ⁴ )
A 10% by weight aqueous solution of
By drying at 3 ° C. for 3 minutes, an ink absorbing layer having a thickness of 15 μm was formed, and a recording sheet was obtained.

The characteristics of the recording sheets obtained in Example 2 and Comparative Examples 1 to 4 were evaluated as follows. (Inkjet recording) An inkjet printer (manufactured by Canon Inc., BJC-4) was applied to the obtained recording sheet.
20J), each color of cyan, magenta, yellow, and black was printed in solid to form a recorded image. (Ink Absorption) The evaluation of the ink absorption was made after the printing was completed.
A PPC copy paper is placed on the printing unit at regular intervals, a load (250 g / cm ² ) is applied on the print paper for 10 seconds, the copy paper is peeled off, and the presence or absence of ink set-off is visually determined. The ink absorption was evaluated based on the time until no transfer was observed. (Water resistance) The water resistance was evaluated after printing by wiping the printed area with a cotton swab soaked in water for 10 reciprocations, and visually checking the ink removal on the following criteria. ：: No change Δ: A small amount of ink was removed and the printed portion became thinner ×: The printed portion of the wiped portion was completely removed (printing condition) The printing condition was evaluated based on the following criteria. ：: The printed area is uniformly printed. 若干: Some unevenness is observed in the printed area. X: Remarkable unevenness is observed in the printed area. (Ink fixability) After immersing the printed area in water at 30 ° C. for 1 minute, It was pulled up vertically, drained well and dried. After drying,
The printed portion was visually evaluated according to the following criteria. ：: The printed portion remains completely △: Bleeding is observed in the printed portion ×: No printed portion remains The results are shown in the table.

[0069]

[Table 1] As is clear from the table, the recording sheets obtained in the examples are higher in water resistance, ink absorption and ink fixability than the comparative examples.

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Claims (7)

[Claims] 1. A resin composition for forming an image receiving layer, which comprises an epoxy compound (1) and a polymer of a polymerizable unsaturated compound (2). 2. A resin composition for forming an image receiving layer,
2. The image recording resin composition according to claim 1, comprising a polymer (2) and an epoxy compound (1) dispersed in a particle form in the polymer. 3. The resin composition of the image receiving layer contains polymer particles having a core-shell structure or a microdomain structure composed of an epoxy compound (1) and a polymer of a polymerizable unsaturated compound (2). The image recording resin composition according to claim 1, which is an aqueous emulsion. 4. The resin composition for image recording according to claim 1, wherein the epoxy compound (1) is an epoxy resin. 5. The image recording resin composition according to claim 1, further comprising a hydrophilic polymer. 6. An image-receiving member for image recording, wherein the image-receiving layer is formed of a resin composition composed of an epoxy compound (1) and a polymer (2) of a polymerizable unsaturated compound. 7. A method for producing an image receiving member for image recording, wherein the resin composition according to claim 1 is applied to at least one surface of a substrate to form an image receiving layer.