JPH10217605A - Photo-sensitive resin composition and article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the absorbing speed of ink, increase the water resistance, and also, make the shape of an ink dot sharper by a method wherein this composition contains an ethylene unsaturated group-containing compound, a grain powder, and a photo-polymerization initiator as essential components. SOLUTION: This photo-sensitive resin composition comprises an ethylene unsaturated group-containing compound A, e.g. a photo-polymerizing monomer, and a photo-polymerizing oligomer can be counted, a grain powder B such as flour, rice powder and corn powder, and a photo-polymerization initiator as essential components. A hardened article is obtained by casting an energy ray such as violet rays and visible beams, on the photo-sensitive resin composition. The article has a thin film of the hardened article of the photo-sensitive resin composition, on the surface. As the article, a medium to be recorded can be counted. As the medium to be recorded, e.g. an ink jet paper, a disk-form recording medium such as CD-R, DVD can be counted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a photosensitive resin composition and an article. The photosensitive resin composition of the present invention provides a high-quality image in which a thin film of a cured product has excellent ink absorbency, and has excellent water resistance of a printed image, and is particularly suitable for an ink receiving layer of an inkjet recording medium. It is suitable.

[0002]

2. Description of the Related Art In recent years, ink-jet recording methods include various ink (recording liquid) discharging methods, for example, an electrostatic suction method, a method of applying mechanical vibration or displacement to ink by using a piezoelectric element, and a method of heating ink to foam. In this method, ink droplets are generated and ejected by a method that uses the pressure, etc., and a part or all of them is attached to a recording medium such as paper to perform recording. Application to various facsimile machines and printers is rapidly spreading because of the fact that high-speed recording is possible, full-color printing is easy, hard copy is easily obtained, and color printing can be performed at low cost. As a recording medium suitable for the ink jet recording system, a recording medium coated with a pigment such as silica on a paper surface to form a porous layer, or a resin that absorbs ink by dissolution or swelling of a plastic substrate (for example, polyester, poly Examples thereof include those obtained by coating or printing on a molded product or a film of methyl methacrylate, polycarbonate, or the like, for example, an OHP (overhead projector) film for inkjet, an optical disk, and the like.

[0003] On the surface of the optical disk recording medium, an ink absorbing layer of a hydrophilic resin coated with a hydrophilic ultraviolet-curing or thermosetting resin is provided for printing the content by, for example, an ink jet method. In this case, the printing surface is non-porous, and a transparent image can be obtained. However, usually, the absorption layer made of such a hydrophilic resin is often soluble in water, and the image is easily destroyed when the image is exposed to water. In addition, even when the ink absorbing layer itself does not dissolve in water, if the image is immersed in water, the ink absorbing layer swells, and the dye forming the image easily escapes into water, and the image has water resistance. However, there was a drawback that it could not be obtained.

In order to solve such disadvantages, a direct dye or an acidic dye is often used as a dye of an ink for ink-jet printing, and thus a cationic dye fixing agent or the like is contained in an ink receiving layer. Has been proposed (Japanese Patent Laid-Open No. 61-261889). However, the dye fixing agent that can be contained in the water-soluble resin is itself water-soluble, and the portion bonded to the dye becomes insoluble, but the other portions are water-soluble.
It is difficult to obtain water resistance of the film of the ink receiving layer. JP-A-61-10438 discloses an ink-receiving layer obtained by cationically modifying polyvinyl alcohol as a water-soluble polymer (hereinafter referred to as "cationic PVA").
Alternatively, it has been proposed to include a crosslinked product thereof. In this case, simply containing cationic PVA does not provide the water resistance of the ink receiving layer itself, as in the case of the cationic dye fixing agent. On the other hand, when a crosslinked product of cationic PVA is used, the ink receiving layer cannot be used. However, it is necessary to use cationic PVA as the water-soluble resin although the water resistance of both the image and the image can be obtained, and it is difficult to increase the ratio of the cationic group in the ink receiving layer in addition to the narrow selection of materials. In addition, sufficient ink drying property and water resistance cannot be obtained in full-color printing or the like where the amount of ink used for recording is large. Further, Japanese Patent Application Laid-Open No. 61-141584 proposes to improve the absorption of ink by adding amorphous silica to a water-soluble resin. In addition, inorganic pigment particles such as porous materials, for example, clay, talc, diatomaceous earth, calcium carbonate, calcium sulfate, barium sulfate, aluminum silicate, synthetic zeolite, alumina, zinc oxide, lithobon, and titanium white have been proposed. (Japanese Patent Application Laid-Open No. 61-22898)
No. 4, JP-B-4-1706, etc.). However, although the ink absorbency is improved, it is still insufficient for full color.

[0005]

DISCLOSURE OF THE INVENTION The present invention relates to a photosensitive resin composition suitable for an ink receiving layer having a high ink absorption rate, excellent water resistance, a sharp ink dot shape, and excellent ink coloring properties. It is for the purpose of product development.

[0006]

The present invention is characterized in that (1) an ethylenically unsaturated group-containing compound (A), flour (B) and a photopolymerization initiator (C) are contained as essential components. (2) the photosensitive resin composition according to (1), wherein the flour is wheat flour; and (2) the ethylenically unsaturated group-containing compound (A) is a hydrophilic monomer. (4) Polymer (D)
(5) The photosensitive resin composition according to any one of (1), (2) and (3), wherein the polymer (D) is PVA (polyvinyl alcohol). ,
(6) the photosensitive resin composition according to any one of (1) to (5), which contains a filler (E), (7) an article having a thin film of the cured product according to (6) on its surface, (8) ) The article of (7), wherein the thickness of the thin film of the cured product is 1 to 100 μm; (9) the article of (7) or (8), wherein the article is a recording medium;
0) The article according to (9), wherein the recording medium is an inkjet paper or a disc-shaped electronic recording medium, and (11) the article according to any one of (7) to (10), wherein the thin film portion is printed with an aqueous ink.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The ethylenically unsaturated group-containing compound (A) used in the present invention includes, for example, a photopolymerizable monomer and a photopolymerizable oligomer. Photopolymerizable monomers are classified into monofunctional monomers, difunctional monomers, and trifunctional or higher polyfunctional monomers. Examples of the monofunctional monomer include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate,
Ethylhexyl (meth) acrylate, 2-ethylhexyl polyethoxy (meth) acrylate, carbitol (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, N, N-dimethylaminoethyl (meth) acrylate, N, N-diethylaminoethyl ( (Meth) acrylate, 3- (N, N-dimethylamino) propyl (meth) acrylate, 3- (N, N-dimethylamino) propyl (meth) acrylamide, N, N-diethylaminoethyl vinyl ether, 4-vinylpyridine, (Meth) acrylamide, N-vinylpyrrolidone,
N-vinylcaprolactam, acrylic monophorin, N,
N-dimethylamino (meth) acrylate, N, N-dimethyl (meth) acrylamide, N-vinylcaprolactam, dicyclopentenyl (meth) acrylate, dicyclopentenyloxyethyl (meth) acrylate, hydrogenated dicyclopentenyl (meth) Acrylate, isobornyl (meth) acrylate, cyclohexane-1,4-
Dimethylol mono (meth) acrylate, o-phenyl phenyloxyethyl (meth) acrylate, o-phenyl phenyloxyethyloxyethyl (meth) acrylate, phenyloxyethyl (meth) acrylate, tribromophenyloxyethyl (meth) Acrylate, phenoxyethyl (meth) acrylate and the like can be mentioned.

As the bifunctional monomer, for example, 1,6
-Hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, 1,9-nonanediol di (meth) acrylate, neopentyl glycol polypropoxydi (meth) acrylate, neopentyl glycol di (hydroxypivalate) di (meth) acrylate ) Acrylate, bisphenol A polyethoxydi (meth) acrylate, bisphenol F polyethoxydi (meth)
Acrylate, polyethylene glycol di (meth) acrylate, bis [(meth) acryloyloxyethyl]
Hydroxyethyl isocyanurate and the like.

Examples of the polyfunctional monomer include, for example, trimethylolpropane tri (meth) acrylate, trimethyloloctane tri (meth) acrylate, trimethylolpropane polyethoxytri (meth) acrylate,
Trimethylolpropane polyproxy tri (meth) acrylate, tris [(meth) acryloyloxyethyl]
Isocyanurate, pentaerythritol tri (meta)
Acrylate, pentaerythritol polyethoxytetra (meth) acrylate, pentaerythritol polypropoxytetra (meth) acrylate, pentaerythritol tetra (meth) acrylate, ditrimethylolpropanetetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipenta Erythritol hexa (meth) acrylate, caprolactone-modified tris [(meth) acryloyloxyethyl] isocyanurate and the like can be mentioned.

The photopolymerizable oligomer includes, for example, epoxy (meth) acrylate, urethane (meth) acrylate, polyester (meth) acrylate, unsaturated polyester, silicon (meth) acrylate, polybutadiene poly (meth) acrylate and the like.

As the epoxy (meth) acrylate,
For example, a reaction product of an epoxy resin and an unsaturated group-containing compound having one carboxylic acid in a molecule, and a reaction product of the reaction product and a polyhydrochloric acid anhydride are exemplified. Examples of epoxy resin include bisphenol A type epoxy resin, bisphenol F
Epoxy resin, phenol novolak epoxy resin, cresol novolak epoxy resin, trisphenolmethane epoxy resin, biphenyl epoxy resin, aliphatic glycidyl ether, alicyclic epoxy resin, and the like. Examples of the unsaturated group-containing compound having one carboxylic acid in the molecule include (meth) acrylic acid and (meth) acrylic acid dimer. Examples of the polybasic acid in the polybasic anhydride include, for example, maleic acid, succinic acid, adipic acid, phthalic acid, terephthalic acid, isophthalic acid, tetrahydrophthalic acid, hexahydrophthalic acid, methyl-tetrahydrophthalic acid and the like. Can be

As urethane (meth) acrylate,
For example, a reaction product of a polyol, an organic polyisocyanate, and a hydroxyl group-containing (meth) acrylate, or the organic polyisocyanate and the hydroxyl group-containing (meth)
Reaction products with acrylates can be mentioned.

Examples of the polyols include ethylene glycol, propylene glycol, diethylene glycol, neopentyl glycol, neopentyl glycol, 1,6-hexanediol, 1,4-butanediol, polytetramethylene glycol, polybutadiene diol, and bisphenol A poly. Polyol (a) such as ethoxydiol and trimethylolpropane, polyester polyol (a-1) which is a reaction product of polyol (a) with polybasic acid or anhydride thereof, polyol (a) with ε-caprolactone or polyol (A)
And polycaprolactone polyols (a-2) and polycarbonate polyols (a-3) which are reaction products of the above-mentioned polybasic acids or their acid anhydrides with ε-caprolactone. Examples of polybasic acids include maleic acid,
Examples include succinic acid, adipic acid, phthalic acid, terephthalic acid, isophthalic acid, tetrahydrophthalic acid, hexahydrophthalic acid, methyl-tetrahydrophthalic acid and the like.

Examples of the organic polyisocyanates include tolylene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, bis (4-isocyanatephenyl) methylene, xylylene diisocyanate, hexamethylene diisocyanate, and trimers of hexamethylene diisocyanate. .

Examples of the hydroxyl group-containing (meth) acrylates include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate,
-Hydroxybutyl (meth) acrylate, pentaerythritol (meth) acrylate, dipentaerythritol penta (meth) acrylate and the like.

Examples of the polyester (meth) acrylate include M-6100, M-6200 and M-625.
0, M-6400, M-6500, M-7100, M-
8030, M-8060, M-8100, M-853
0, M-8560, M-9050 (all manufactured by Toa Gosei Co., Ltd.) and the above-mentioned polyester polyol (a-1)
(Meth) acrylate and the like.

In the present invention, a hydrophilic monomer is preferably used as the ethylenically unsaturated group-containing compound (A), and a compound having a tertiary nitrogen or hydroxyl group in the molecule is more preferable. Specific examples thereof include, for example, acrylic monophorin, N-vinylpyrrolidone, N-vinylcaprolactam, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, tetrahydro Furfuryl (meth) acrylate, phenoxyethyl (meth) acrylate, (meth) acrylamide, dimethyl (meth) acrylamide, diethylamino (meth) acrylate, dimethylaminopropyl (meth) acrylamide, dimethylaminoethyl (meth) acrylate, dimethylamino ( Meth) acrylates,
N, N-diethylaminoethyl (meth) acrylate,
3- (N, N-dimethylamino) propyl (meth) acrylate, N, N-diethylaminoethyl vinyl ether, 4-vinylpyridine, bis [(meth) acryloyloxyethyl] hydroxyethyl isocyanurate, tris [(meth) acryloyloxy Ethyl] isocyanurate, caprolactone-modified tris [(meth) acryloyloxyethyl] isocyanurate, polyethylene glycol di (meth) acrylate, pentaerythritol tri (meth) acrylate, trimethylolpropane polyethoxytri (meth) acrylate, pentaerythritol polyethoxy Examples thereof include tetra (meth) acrylate. These can be used alone or in combination of two or more. Further, these hydrophilic monomers and non-hydrophilic monomers may be used in combination.

In the present invention, flour (B) such as wheat flour, rice flour, and corn flour is an essential component. By adding and dispersing the flour (B) in the resin, the absorptivity, drying property and fixability of the inkjet ink in the ink receiving layer can be increased. Flour is preferred among flours. The flour usually has a particle size of 0.01 to 70 μm, preferably 0.01 to 50 μm, more preferably 0.01 to 70 μm.
30 μm. As an ingredient of flour, for example, 10
0 g of protein 8 g Lipid 2 g Carbohydrate 76 g (Nisshin Flour Milling Flower) Water 14 g. At this time, the components of the protein can be divided into a soluble protein and a gluten protein. These ratios are usually 10-20: 80-90.
%. For details, Science of Food Series, Science of Wheat Seiichi Nagao, Asakura Shoten (Published: '95 .2 / 25,
(Pages 93 to 94).

The content of the flour is preferably 1 to 50% by weight, and more preferably 10 to 50% by weight based on the total amount of the photosensitive resin composition.
It is 50% by weight, particularly preferably 20 to 50% by weight.
By providing a cured film of the photosensitive resin composition containing flour in such a range, writing with an inkjet ink containing a water-soluble dye is possible, and the drying speed of printing is high, and the ink used further is Is fixed by an intermolecular force, so that a recording medium having higher water resistance of printing can be obtained. If the content is too large, the viscosity of the coating film becomes too high, and uniform coating becomes difficult.
On the other hand, if the amount is too small, writing with an ink containing a water-soluble dye becomes difficult, the drying speed of printing decreases, and the water resistance of printing deteriorates.

The photopolymerization initiator (C) used in the present invention may be any known photopolymerization initiator, and specific examples thereof include, for example, 2-hydroxy-2-methylpropiophenone, -Isopropyl-2-hydroxy-2-
Methyl propiophenone, benzyl dimethyl ketal,
1-hydroxycyclohexylphenyl ketone, benzophenone, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropane-1,2,4,6-
Trimethylbenzoylphenylphosphine oxide,
Bis (2,6-dimethoxybenzoyl) -2,4,4-
Trimethylpentyl phosphinoxide and the like can be mentioned, and these photopolymerization initiators can be used in combination with a polymerization initiation assistant such as a tertiary amine.

The photosensitive resin composition of the present invention can contain a polymer (D). As the polymer (D), there are a hydrophilic polymer and a non-hydrophilic polymer,
It is desirable to contain a hydrophilic polymer. Polyvinyl alcohol, polyethylene glycol, polypropylene glycol, polyacrylamide, polyvinyl ether,
Examples include a polymaleic acid copolymer, polyethyleneimine, and polyvinylpyrrolidone. In addition to these, copolymers and homopolymers obtained by synthesizing the above-mentioned tertiary nitrogen or hydroxyl group-containing hydrophilic monomer using a known solution polymerization method can also be used. Among them, PVA is preferable.
Alternatively, polyvinylpyrrolidone is used. further,
Particularly preferred are, for example, those having a degree of saponification of PVA of 50% or less, such as Goseilan L-0301 manufactured by Nippon Synthetic Chemical Industry Co., Ltd. One or more of these polymers can be used by dissolving or dispersing them.

A filler (E) can be added to the photosensitive resin composition of the present invention. Porous particles conventionally used as the filler (E), for example, silica, clay, talc, diatomaceous earth, calcium carbonate, calcium sulfate, barium sulfate, aluminum silicate, synthetic zeolite, smectite, montmorillonite group mineral, synthetic mica , Alumina and the like. Also, inorganic pigment particles,
For example, zinc oxide, titanium white and the like may be used in combination.

The proportion of each component used in the photosensitive resin composition of the present invention may be selected from ethylenically unsaturated group-containing compound (A)
The components are 5 to 60% by weight, preferably 20 to 60% by weight,
Particularly preferably, 40 to 60% by weight, and the component (B) is 1 to 5%.
0%, preferably 10 to 50%, particularly preferably 20 to
50%, the content of the photopolymerization initiator (C) is 0.01 to 10% by weight, preferably 1 to 5% by weight, particularly preferably 2 to 5% by weight.
% By weight, the polymer (D) component is 0 to 50% by weight, preferably 0 to 40% by weight, particularly preferably 0 to 30% by weight, and the filler (E) is 0 to 60% by weight, preferably 0 to 50% by weight.
It is 40% by weight, particularly preferably 0 to 30% by weight.

If necessary, additives such as an antioxidant, an antifoaming agent, a leveling agent, a light stabilizer and a polymerization inhibitor may be added to the photosensitive resin composition of the present invention. it can. As an antioxidant, for example, BHT Suwanox (manufactured by Seiko Chemical Co., Ltd.), and as an antifoaming agent, for example, K
S-603 (Shin-Etsu Chemical Co., Ltd.), as a leveling agent, for example, SH-29PA (Toray Dow Silicone Co., Ltd.), and as a light stabilizer, for example, LA-82 (Asahi Denka Kogyo Co., Ltd.) ), As a polymerization inhibitor, for example, Q-
1301 (manufactured by Wako Pure Chemical Industries, Ltd.) and the like.

The photosensitive resin composition of the present invention comprises, for example, the components (A) and (C), and if necessary, the component (D) in an amount of 30 to 80.
The mixture is mixed under heating at about ° C, and the component (B), if necessary, the component (E), and if necessary, for example, an antioxidant,
It can be obtained by adding and uniformly mixing and dispersing additives such as an antifoaming agent, a leveling agent, a light stabilizer, and a polymerization inhibitor.

The cured product of the present invention can be obtained by irradiating the above-mentioned photosensitive resin composition with energy rays such as ultraviolet rays and visible rays. Examples of the light source include a metahalide lamp and a high-pressure mercury lamp.

The article of the present invention has on its surface a thin film of a cured product of the above photosensitive resin composition. Examples of the article include a recording medium. Examples of the recording medium include inkjet paper such as inkjet paper and OHP sheets, CD-R (write-once compact disc),
Disc-shaped recording media such as VD (Digital Video Disc) can be used. The article of the present invention is obtained by coating the photosensitive resin composition of the present invention as an ink receiving layer on a substrate of the article with a film thickness of 1.
１００100 μm, applied by a method such as a screen printing method or a bar coater method, and cured by irradiating energy rays such as ultraviolet rays to form an ink receiving layer comprising a thin film of a cured product of the photosensitive resin composition of the present invention. Can be obtained. As the base material of the article, for example, paper, sheet-like or plate-like plastic (material is, for example, polyester, polymethyl methacrylate, polycarbonate, etc.)
Is raised. The paper, sheet-like or plate-like plastic may have a surface on which the ink receiving layer is formed, which is treated with a primer or an overcoat agent.

The aqueous ink used in the present invention contains a water-soluble dye preferably in an amount of about 0.1 to 20% by weight, more preferably about 0.5 to 10% by weight, and still more preferably about 1 to 8% by weight. Water-based inks further include water-soluble organic solvents
It may contain 30% by weight and 0 to 5% by weight of an ink preparation.

Examples of the water-soluble dye include CI Direct Yellow 86, CI Acid Red 35, CI Direct Blue 86, CI Food Black 2, and the like.

Examples of the water-soluble organic solvent include C1-C4 alkanols such as methanol, ethanol, propanol, isopropanol, butanol, isobutanol, sec-butanol and tert-butanol, N, N-dimethylformamide or N, N-dimethyl. Carboxylic acid amides such as acetamide, lactams such as ε-caprolactam, N-methylpyrrolidin-2-one, urea, 1,3-dimethylimidazolidin-2-one or 1,3-dimethylhexahydropyrimidin-2-one Such as cyclic urea, acetone,
Methyl ethyl ketone, ketones such as 2-methyl-2-hydroxypentan-4-one or keto alcohols, ethers such as tetrahydrofuran, dioxane, mono-, oligo- or polyalkylene glycols having C2-C6 alkylene units or thioglycols, for example ethylene glycol, 1,2- or 1,3-propylene glycol, 1,2- or 1,4-butylene glycol, 1,6
Mono-, oligo- or polyalkylene glycols having C2-C6 alkylene units such as hexylene glycol, diethylene glycol, triethylene glycol, dipropylene glycol, thiodiglycol, polyethylene glycol, polypropylene glycol, etc. or thioglycol, glycerin, hexane-1. 2.6 Other polyols (triols) such as 6-triol, C1-C4 alkyl ethers of polyhydric alcohols such as ethylene glycol monomethyl or monoethyl ether, diethylene glycol monomethyl or monoethyl ether or triethylene glycol monomethyl or monoethyl ether,
γ-butyrolactone, dimethyl sulfoxide and the like.

Preferred water-miscible organic solvents are, for example, N-methylpyrrolidin-2-one, mono-, di- or trialkylene glycols having C2 to C6 alkylene units, in particular mono-, di- or triethylene glycol, Propylene glycol and dimethyl sulfoxide. Particularly, N-methylpyrrolidin-2-one, diethylene glycol and dimethyl sulfoxide are preferred.

Examples of the ink preparation agent include an antiseptic / antifungal agent, a pH adjuster, a chelating agent, a rust inhibitor, a water-soluble ultraviolet absorber, a water-soluble polymer compound, a dye dissolving agent, a surfactant and the like. Examples of the antiseptic / antifungal agent include sodium dehydroacetate, sodium sorbate, sodium 2-pyridinethiol-1-oxide, sodium benzoate, sodium pentachlorophenol and the like. PH
As the adjusting agent, any substance can be used as long as it can control the pH of the ink in the range of 8.0 to 11.0 without adversely affecting the ink to be prepared. Examples thereof include alkanolamines such as diethanolamine and triethanolamine, hydroxides of alkali metal elements such as lithium hydroxide, sodium hydroxide and potassium hydroxide, ammonium hydroxide, lithium carbonate, sodium carbonate and potassium carbonate. And alkali metal carbonates. As chelating reagents,
For example, sodium ethylenediaminetetraacetate, sodium nitrilotriacetate, sodium hydroxytylethylenediaminetriacetate, sodium diethylenetriaminepentaacetate, sodium uramildiacetate and the like can be mentioned. Examples of the rust preventive include acidic sulfite, sodium thiosulfate, ammonium thioglycolate, diisopropylammonium nitrite, pentaerythritol tetranitrate, dicyclohexylammonium nitrite, and the like.

[0033]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, which should not be construed as limiting the scope of the Examples. In the following description, “parts” and “%” indicate “parts by weight” and “% by weight”, respectively, unless otherwise specified.

Examples 1 and 2 The photosensitive resin composition was prepared according to Table 1 and had a thickness of 100 μm.
m on a polyethylene terephthalate film having a thickness of 5 to 12 μm after curing by a bar coater method, and irradiating ultraviolet rays to cure the coating to form a recording medium. Various evaluations (ink drying time, water resistance, durability, and curl properties) were performed using the ink.

The composition of the used ink is as follows. Yellow ink: CI Direct Yellow 86 2 parts, diethylene glycol 20 parts, polyethylene glycol # 200 10 parts, water 70 parts Red ink: CI Acid Red 35 2 parts, diethylene glycol 20 parts, polyethylene glycol # 200
10 parts, water 70 parts Blue ink: CI Direct Blue 86 2 parts, diethylene glycol 20 parts, polyethylene glycol # 20
0 10 parts, water 70 parts Black ink: CI Food Black 2 2 parts, diethylene glycol 20 parts, polyethylene glycol # 200
10 parts, water 70 parts

Evaluation method 1) Ink drying property The recording medium printed by the ink jet recording method was left at room temperature (20 ° C., 65% RH), and when the finger touched the printed image, the ink dried and adhered to the finger. The time was measured until it disappeared, and it was determined in the following manner. ○ ・ ・ ・ Time to dry and no longer adhere to finger is 30
Within seconds. Δ: Time to dry and no longer adhere to finger is 30
Between seconds and 1 minute. ×: Time required for drying and no longer attaching to the finger is 1 minute or more.

2) Water Resistance The recording medium printed by the ink jet recording method was left standing in water for 24 hours, and the appearance was observed.・ ・ ・: There is no change in the printed image. Δ: Slight bleeding and fading occurred in the printed image. X: The printed image almost disappeared, and the coating film was ragged.

3) Durability The recording medium printed by the ink jet recording method is 80
After standing at 500 ° C. and 80% RH for 500 hours, the appearance was observed.・ ・ ・: There is no change in the printed image. Δ: Slight bleeding and fading occurred in the printed image. X: The printed image almost disappeared.

4) Transportability When printing on a recording medium under the conditions of 35 ° C. and 85% RH, the recording medium that adheres to the feed roller of the printer and cannot be transported due to the stickiness of the surface of the ink receiving layer. "X", "Slightly sticky" on the surface of the ink receiving layer due to slight stickiness, "△";

5) Curling property The curling state of the recording medium thus prepared was observed.・ ・ ・: There is no curl at all. Δ: Very slightly curled. X: Large curl.

[0041]

Table 1 Table 1 Example 12 (A) 2-Hydroxyethyl acrylate Component 8.6 4.4 Bis (acryloyloxy) hydroxyethyl isocyanurate 11.5 11.4 Acryloyl monophorin 28.7 28.5 Methacrylamidopropyltrimethylammonium dimethyl sulfate 5.1 5.3 (B ) Flour 34.4 22.0 ingredient (C) 1-hydroxycyclohexyl phenyl ketone ingredient 2.9 2.9 Luciline TPO 2.2 (D) PVA 8.6 8.6 ingredient (E) Titanium oxide 14.5 ingredient addition BYK-354 0.3 0.3 agentイ ン ク Ink drying properties ○ ○ Water resistance ○ ○ Durability ○ ○ Transportability ○ ○ Curlability ○ ○

PVA is Goseilan L-0301 manufactured by Nippon Synthetic Chemical Industry Co., Ltd., and flour is BYK manufactured by Nisshin Flour Milling Co., Ltd.
-354 is a product of Big Chemie. In Table 1, all values are by weight.

As is clear from the evaluation results in Table 1, the cured film of the photosensitive resin composition of the present invention is excellent in the drying property, water resistance, durability, transportability and curling properties of the ink.
It is considered that the drying property of this ink is due to the high water absorbing ability of the cured film. Due to this high water absorption capacity and water resistance, the cured film of the photosensitive resin composition of the present invention has antifogging property, antistatic property and antislip property.

[0044]

According to the photosensitive resin composition of the present invention, when the obtained cured product is used for an ink receiving layer of a recording medium of an ink jet recording system, the drying property, water resistance, durability and transportability of the ink are obtained. It has excellent curl properties and is effective as an ink receiving layer of an inkjet recording type recording medium.
Further, since the cured film of the photosensitive resin composition has anti-fogging property, anti-static property and anti-slip property, it imparts anti-fogging property to glass and film, imparts anti-static property to electronic recording medium, It can be used for imparting anti-slip properties to seats and various grips (for example, golf clubs, bats, automobile handles, various tools, etc.).

Claims (11)

[Claims] 1. A photosensitive resin composition comprising, as essential components, an ethylenically unsaturated group-containing compound (A), flour (B) and a photopolymerization initiator (C). 2. The photosensitive resin composition according to claim 1, wherein the flour is wheat flour. 3. The photosensitive resin composition according to claim 1, wherein the ethylenically unsaturated group-containing compound (A) is a hydrophilic monomer. 4. The method according to claim 1, which comprises a polymer (D).
3. The photosensitive resin composition according to any one of 3. 5. The photosensitive resin composition according to claim 4, wherein the polymer (D) is polyvinyl alcohol. 6. The composition according to claim 1, which further comprises a filler (E).
The photosensitive resin composition according to any one of the above. 7. An article having on its surface a thin film of the cured product according to claim 6. 8. The article according to claim 7, wherein the thin film of the cured product has a thickness of 1 to 100 μm. 9. An article according to claim 7, wherein said article is a recording medium.
Goods. 10. The article according to claim 9, wherein the recording medium is an inkjet paper or a disk-shaped electronic recording medium. 11. The article according to claim 7, wherein the thin film portion is printed with an aqueous ink.