JP2003064317A - Coating liquid containing fine particle of highly water- absorbing polymer and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coating liquid producible at a low cost, having good storability, easily applicable to a coating object by conventional method such as printing and stably exhibiting the function of functional materials such as perfume and mothproofing agent over a long period and provide a method for the production of the coating liquid. SOLUTION: The coating liquid containing fine particles of a highly water- absorbing polymer is produced by (1) dissolving and/or dispersing a functional material in water to obtain an aqueous solution and/or dispersion, (2) absorbing the aqueous solution and/or dispersion produced by the step (1) in fine particles of the highly water-absorbing polymer and (3) dispersing the fine particles of the polymer produced by the step (2) in an oily dispersion medium.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a coating liquid containing superabsorbent polymer fine particles and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, an oily functional material such as an oily fragrance or a thermochromic substance is microencapsulated by a known method to form an ink, which is used for various purposes such as printing on a substrate. . On the other hand, it is not impossible to make a functional material into an ink by microencapsulating it, but it is not actually used because of high cost and poor storability.

[0003]

The first object of the present invention is to solve the conventional problems and to provide a coating liquid containing a functional material, which is inexpensive and has good storage stability, and which is printed on an object. It is to provide a coating liquid capable of stably exhibiting the function of a functional material over a long period of time, and a second object of the present invention is to provide a method for easily producing such a coating liquid. Is.

[0004]

Means for Solving the Problems As a result of earnest research for solving the above-mentioned problems, the present inventor has found that, for example, a functional material is dissolved in water, and this aqueous solution is absorbed by superabsorbent polymer fine particles to absorb the aqueous solution. It has been found that the problem can be solved by dispersing the superabsorbent polymer fine particles thus prepared in an oil dispersion medium, and the present invention has been accomplished.

A coating liquid containing superabsorbent polymer fine particles according to claim 1 of the present invention for solving the above problems is an oily dispersion of superabsorbent polymer fine particles that have absorbed an aqueous solution and / or dispersion of a functional material. It is characterized by being dispersed in a medium.

The coating liquid containing superabsorbent polymer fine particles according to claim 2 of the present invention is characterized in that, in the coating liquid according to claim 1, the superabsorbent polymer fine particles are spherical fine particles.

The coating solution containing superabsorbent polymer fine particles according to claim 3 of the present invention is the coating solution according to claim 1 or 2, wherein the functional material is a fragrance, an insect repellent, a fungicide or a fungicide. It is a material selected from agents, repellents, gas detection agents, and deodorants.

A fourth aspect of the present invention provides the following steps (1) to
The method for producing a coating liquid containing superabsorbent polymer fine particles is characterized by being produced by (3). (1) An aqueous solution and / or dispersion is prepared by dissolving and / or dispersing a functional material in water. (2) The superabsorbent polymer fine particles are allowed to absorb the aqueous solution and / or dispersion prepared in step (1). (3) The super absorbent polymer particles prepared in step (2) are dispersed in an oil dispersion medium to prepare a coating liquid containing super absorbent polymer particles.

The coating liquid containing the superabsorbent polymer fine particles of the present invention is, for example, an aqueous solution of a functional material such as a fragrance, an insect repellent, a fungicide, a fungicide, a biorepellent, a gas detection agent and a temperature indicator. Since the superabsorbent polymer particles that have been absorbed are dispersed in an oil-based dispersion medium, they are inexpensive and have good storability, and can be easily applied to a target object by a known method such as printing, and high in the coating film. Since the functional material absorbed by the water-absorbent polymer particles is stably maintained, the function of the functional material can be stably exerted for a long period of time, and if the functional material is volatile or migrating, it is gradually applied. Since it is released into the film and / or to the outside, the function of the functional material can be stably exhibited for a long period of time. The coating liquid of the present invention can be easily produced by the method for producing a coating liquid containing the superabsorbent polymer fine particles of the present invention.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described in detail based on the embodiments. FIG. 1 is an explanatory diagram schematically showing a state in which a coating liquid containing superabsorbent polymer particles of the present invention is applied to an object. In FIG. 1, 1 is an object, 2 is a coating film,
Reference numeral 3 denotes super absorbent polymer particles which have absorbed the aqueous solution and / or dispersion liquid of the functional material 4. Since the functional material 4 absorbed by the superabsorbent polymer fine particles 3 in the coating film 2 is stably maintained, the function of the functional material 4 can be stably exhibited for a long period of time, and the functional material 4 is volatile or If it is migrating, it is gradually released into the coating film 2 and / or to the outside, so that the function of the functional material 4 can also be stably exhibited for a long period of time.

The superabsorbent polymer used in the present invention includes starch-based, cellulose-based, or synthetic resin-based polymers such as acrylamide, acrylic acid, acrylic acid salt, methacrylic acid salt, styrene and vinyl ether, and copolymers and terpolymers. And so on. As commercially available products, for example, nonionic polyalkylene oxide superabsorbent polymer "AQUACALK" (manufactured by Sumitomo Seika)
Since the water absorption does not change even with salt, it can be suitably used.

[0012] Among the superabsorbent polymers, there are water-soluble, pasty, or water-swellable particles, crushed particles, granules, and powders when they absorb water. Any of these can be used.

As the super absorbent polymer having a strip shape,
Specifically, an aqueous solution of a monomer containing acrylic acid and an ammonium salt of acrylic acid or an alkali metal salt is mixed with 0.
A moderately crosslinked superabsorbent polymer obtained by adding 1 to 10% by mass of a polyvalent organic metal ion crosslinking agent to aqueous solution polymerization and drying, or an ammonium salt or an alkali metal salt of acrylic acid and acrylic acid. Examples of the water-absorbing polymer which are obtained by post-crosslinking the copolymer of (1) with 0.1 to 10% by mass of a polyvalent organic metal ion crosslinking agent can be cited.

As the superabsorbent polymer exhibiting a crushed, granular or powdery state, a method of pulverizing the superabsorbent polymer into a predetermined particle shape, polymerization or condensation from a raw material compound of the superabsorbent polymer. Then, a method of forming the polymer compound in a granular form is exemplified. Among them, spherical or granular polyacrylic acid salt obtained by reverse phase suspension polymerization in an organic solvent, a method of saponifying a vinyl alcohol / acrylic acid salt copolymer or an isobutylene / maleic anhydride copolymer. The resulting superabsorbent polymer (for example, average particle size of about 0.005 to 5 mm) is preferably used because even if water is absorbed, the particles remain non-adhesive to each other and maintain independent particles in a water-retaining state. it can.

A superabsorbent polymer which maintains independent particles even in a water-retaining state can absorb a large amount of an aqueous solution or an aqueous dispersion with high absorbency, and can be sticky or clumped even if absorbed. It is easy to use and easy to handle.

The particle size of the superabsorbent polymer fine particles used in the present invention is not particularly limited, and may be of the nm order (molecular dispersion system) depending on the application, type of product, or nm-μm. It may be of the order (colloidal dispersion system), or of μm or larger (coarse particle dispersion system), or a mixture of two or more thereof.

The functional material used in the present invention may be one that is soluble in water or is well dispersible in water, and specifically, for example, a fragrance, an insect repellent, a fungicide, a fungicide, and a rodent-proof. Mention may be made of one or more known functional materials such as repellents such as agents, gas detectors, deodorants and the like. In order to disperse in water, known surfactants, emulsifiers and the like can be appropriately used.

The fragrances used in the present invention include ryuzen scent, benzoin, raccoon incense, spirit cat scent, clove oil, galbanum, jasmine absolute, labutanum, mate tea, melilot, mimosa, musk tonkin, myrrh, oak moss or moss de chine, milk scent. , Natural fragrances such as, juniper aroma, orris, batchuli, rosemary oil, sandalwood oil, vetiver oil, violet leaf absolute, higher alcohols, aldehydes, benzaldehyde, benzoic acid, cinnamic acid, cinnamic aldehyde, cinnamic alcohol, coumarin, Mention may be made of various synthetic flavors such as esters, indoles, ketones, salicylic acid and related compounds, terpenoids, vanillin and the like, or mixtures of two or more thereof. A commercially available product can also be used.

Examples of the antibacterial agent used in the present invention include:
Alcohols such as ethanol, hypochlorite, N-chloramines, iodine, inorganic and / or organic mercury, copper compounds, zinc compounds, silver compounds, peroxides, phenol compounds, hydroxybenzoic acid, bis (hydroxyphenyl) ) Alkane, 8-hydroxyquinoline and its derivatives, quaternary ammonium related compounds, pine oil compounds,
In addition to known antimicrobial active ingredients such as carbamic acid and urea derivatives, ethylene oxide and propylene oxide, known antibacterial agents such as phenols, halogen compounds, quaternary ammonium compounds, metal derivatives, amines, alkanolamines and nitro derivatives, Anilide, organic sulfur, sulfur-
Nitrogen compounds, nalidixic acid and other quinolonecarboxylic acids, nitrofuran, sulfonamides and the like can be mentioned. These may be used alone or in combination of two or more.

Known antifungal agents can be used in the present invention. Specifically, for example, in addition to the above-mentioned known antimicrobial active ingredients, isothiazolone compounds or inclusion compounds of isothiazolone compounds can be used. Can be mentioned. These may be used alone or in combination of two or more.

As the insect repellent used in the present invention, known ones can be used. Specifically, for example, insect repellents such as camphor, naphthalene, etc., which destroy insects by volatile components, and larvae poisons are positively infected. Compounds containing phosphorus, fluorine, chlorine, etc., diethyltoluamide with repellent effect, N-
Examples thereof include butyl acetanilide, 2-ethyl-1,3-hexanediol, 2-butyl-2-ethyl-1,3-propanediol, propyl mandelate and the like. These may be used alone or in combination of two or more.

Known repellents can be used as the repellent in the present invention. Specifically, for example, dimethyl phthalate,
Mosquito repellent such as 2-ethyl-1,3-hexanediol and DEET, repellent of mites and chiggers such as 5% DEET, dibutyl succinate, hexahydrodibenzofurancarboxaldehyde-butadienefurfural copolymer, t-butyl -N, N-dimethyldithiocarbamate, cockroach repellent such as 2-hydroxyethyl n-octyl sulfide, isobutylene oligomer, bird repellent such as anthrahydroquinone, dimethyl selenide, kerosene, deer such as creosote, rabbit , Rodent repellents, and rodent-proofing agents such as 3- [2- (3,5-dimethyl-2-oxocyclohexyl) -2-hydroxyethyl] glutarimide.

The gas detecting agent used in the present invention is capable of qualitatively and quantitatively determining the color of these gases by utilizing the fact that it reacts with oxygen, ammonia, CO gas, CO ₂ gas and the like to develop a color. However, known materials can be used. Specifically, for example, as shown in JP-A-7-83911, for acidic gas or alkaline gas detection materials as shown in JP-A-7-243973, and for ammonia gas. An indicator agent consisting of a fluorescein dye and a strongly acidic organic acid detects the fluorescein dye by coloring it with a basic gas. In oxygen, bis (salicylaldehyde) alkylenediiminecobalt (II) and its derivatives, bis (orthohydroxyacetophenone) rukyrendiiminecobalt (II) and its derivatives, viologen, redox drug, reducing sugar and alkaline Examples thereof include redox dyes that exhibit different colors in the oxidation type and the reduction type in the presence of a substance. Examples of the redox dyes include thiazine dyes, indigoid dyes, thioindigoide dyes, sulfur dyes, and the like, and these can be used in combination of two or more kinds. When two or more kinds of compounds that rapidly change color upon reaction with oxygen are combined, they can be used as a solid solution having a crystal structure different from that of each single component, in addition to simply mixing two or more kinds. Bis (salicylaldehyde) alkylenediiminecobalt (II) and its derivatives and bis (orthohydroxyacetophenone) alkylenediiminecobalt (II) and its derivatives are dark green when inactivated (oxygen absorbed). Yes, it turns yellow in the activated state (unabsorbed oxygen). Further, methylene blue (thiazine dye), which is a typical example of redox dye, changes from colorless to blue. Bis (salicylaldehyde) alkylenediiminecobalt (II) and bis (orthohydroxyacetophenone) alkylenediiminecobalt (I
The alkylenediimine of I) is ethylenediimine, hexamethylenediimine, 3,3-diimino-di-n-propylamine and the like, and the derivative is a hydrogen atom having a halogen atom, an alkyl group, an alkoxy group, a nitro group. It is substituted with a group or the like. A mixture of two or more cobalt complexes can be obtained by simply intimately mixing in a powder state, but a mixture of two or more selected from salicylaldehyde, orthohydroxyacetophenone and their derivatives is used as an alkylenediamine and It can also be obtained by refluxing in an alcohol solvent such as ethanol together with a cobalt salt such as cobalt acetate or cobalt nitrate. In addition, a mixture of two or more selected from bis (salicylaldehyde) alkylenediimine, bis (orthohydroxyacetophenone) alkylenediimine and their derivatives, hot aqueous solution containing sodium acetate and sodium hydroxide, and cobalt chloride (II ) It can also be obtained by adding an aqueous solution. Further, examples of the CO indicator include molybdenum, tungsten or vanadium salts or acid salts, palladium, ruthenium or osmium salts, iron, chromium or cerium salt aqueous solutions, and the like.

The deodorant used in the present invention is chemically,
Any substance having a deodorizing effect by physical, biochemical or physicochemical action can be used. For example, cyclodextrin, glyoxal, flavonoids,
Examples include substances having a deodorizing effect such as vitamin C iron salts and oxidation catalysts, and other original deodorants specially manufactured and sold by domestic and foreign manufacturers. Specific examples of these include cyclodextrins such as Celldex CH-20 and CH manufactured by Nippon Food Processing Co., Ltd.
-30, CH-30H, 1,2-ethanedial as glyoxal manufactured by Daicel Chemical Industries, Ltd., flavonoid as fresh shiraimatsu manufactured by Shiraimatsu Shinyaku Co., Ltd., and original deodorant as Nippon Zenon Co., Ltd. Zeon Clean ZCL-3040, ZCL-1010
A, ZCL-9050, ZCL-9051, Epolion IMP, HP, NZ, BN-6 manufactured by Aiko Co., Ltd.
5, Deoretto manufactured by Meiji Pharmaceutical Co., Ltd., Acrease manufactured by Liaodong Chemical Co., Ltd., and the like. These deodorants can be used alone or in combination of two or more kinds.

The oily dispersant used in the present invention can be prepared as a coating solution by dispersing an aqueous solution in which a functional material is dissolved and / or dispersed in water and / or superabsorbent polymer fine particles in which a dispersion is absorbed. Then, hexane, cyclohexane, carbon tetrachloride, chloroform, dichloromethane, dichloroethane, diethyl ether, 1,2-dimethoxyethane, tetrahydrofuran, 1.4-dioxane, ethyl acetate, N, N-dimethylformamide, hexamethylphosphoramide. , Acetone, acetonitrile,
Low molecular weight organic compounds, oligomers or polymers such as aliphatic solvents such as methanol, ethanol, nitromethane, dimityl sulfoxide, sulfolane, aromatic solvents such as benzene, toluene, naphthalene, chlorobenzene, anisole, diphenyl ether, pyridine, nitrobenzene, etc. Can be a mixture of one or more,
It is not particularly limited.

As another example of the oily dispersant used in the present invention, a non-aqueous vehicle can be mentioned. The non-aqueous vehicle may be the solvent, the non-aqueous ink or the like, or a mixture thereof, and is not particularly limited. Specific examples of the non-aqueous ink include albumin, gelatin, casein, starch, gum arabic, natural resins such as sodium alginate, cellulose derivatives such as carboxymethyl cellulose and hydroxyethyl cellulose, polyamide, polyacrylamide, polyhydroxyethyl methacrylate. , Polyphenylacetoacetal, polyethyleneimine, polyvinylpyrrolidone, polyvinylpyridinium halide, melamine resin, polyurethane, polyvinyl alcohol and its derivatives, polyester, sodium polyacrylate, synthetic resin such as acrylic acid ester copolymer, dimethylamine epichlorohydrin Polycondensate, acrylamide / diallylamine copolymer, polyvinylamine copolymer, dicyandiamide, dimethyl
An ink using a cationic resin such as a compound containing diallyl ammonium chloride as a main component or a mixture of two or more thereof can be mentioned. In addition, an electron beam curable ink, an ultraviolet curable ink, an anionic resin such as a rosin-modified maleic acid having an anionic group such as a sulfonic acid group, a carboxyl group, a sulfuric acid ester group, a phosphoric acid ester group or the like may be used as necessary. Can be used.

Among these, electron beam curable ink and ultraviolet curable ink can be preferably used in the present invention. Such electron beam curable and ultraviolet curable inks include
Any known acrylic photopolymerizable monomer and / or acrylic photopolymerizable oligomer can be arbitrarily selected and used.

Examples of the photopolymerizable monomer include unsaturated carboxylic acids such as acrylic acid and methacrylic acid or esters thereof, such as alkyl-, cycloalkyl-, halogenated alkyl-, alkoxyalkyl-, hydroxyalkyl- and aminoalkyl-. , Tetrahydrofurfuryl-, allyl-, glycidyl-, benzyl-, phenoxy-acrylates and methacrylates, alkylene glycols, polyoxyalkylene glycol mono- or diacrylates and methacrylates, trimethylolpropane triacrylate and methacrylates, pentaerythritol tetraacrylate and Acrylamide, methacrylamide, or derivatives thereof such as methacrylate, for example, acryl mono- or di-substituted with an alkyl or hydroxyalkyl group. Amide and methacrylamide, diacetone acrylamide and methacrylamide, N, N '
Allyl compounds such as alkylene bis acrylamide and methacrylamide, such as allyl alcohol, allyl isocyanate, diallyl phthalate, triallyl isocyanurate and the like.

For applications where curing shrinkage is an obstacle, for example, isobornyl acrylate or methacrylate, norbornyl acrylate or methacrylate, dicyclopentenoxyethyl acrylate or methacrylate, dicyclopentenoxypropyl acrylate or Acrylic acid ester or methacrylic acid ester of diethylene glycol dicyclopentenyl monoether such as methacrylate, polyoxyethylene or polypropylene glycol dicyclopentenyl monoether acrylic acid ester or methacrylic acid ester, such as dicyclopentenyl cinnamate, dicyclopentenoxy Ethyl cinnamate, dicyclopentenoxyethyl monofumarate or difumarate such as 3,9-bis (1,1
-Bismethyl-2-oxyethyl) -spiro [5,5]
Undecane, 3,9-bis (1,1-bismethyl-2-
Oxyethyl) -2,4,8,10-tetraoxaspiro [5,5] undecane, 3,9-bis (2-oxyethyl) -spiro [5,5] undecane, 3,9-bis (2-oxyethyl) Mono-, diacrylate or mono-, dimethacrylate such as -2,4,8,10-tetraoxaspiro [5,5] undecane, or mono-, ethylene oxide or propylene oxide addition polymer of these spiroglycols, Diacrylate, mono- or dimethacrylate, or methyl ether of the monoacrylate or methacrylate, 1-azabicyclo [2,2,2] -3-octenyl acrylate or methacrylate, bicyclo [2,2,1] -5 -Heptene-2,3-dicarboxyl monoallyl ester, such as dicyclopenta Enyl acrylate or methacrylate, it can be used a photopolymerizable monomer, such as dicyclopentadienyl oxyethyl acrylate or methacrylate, dihydrodicyclopentadienyl acrylate or methacrylate. These photopolymerizable monomers may be used alone or in combination of two or more.

As the acrylic photopolymerizable oligomer,
Acrylic acid ester of epoxy resin such as diglycidyl ether diacrylate of bisphenol A, reaction product of epoxy resin with acrylic acid and methyltetrahydrophthalic anhydride, reaction product of epoxy resin with 2-hydroxyethyl acrylate, glycidyl diacrylate Ring-opening copolymerization ester of acrylate and phthalic anhydride, ester of methacrylic acid dimer and polyol, polyester obtained from acrylic acid, phthalic anhydride and propylene oxide, reaction product of polyvinyl alcohol and N-methylolacrylamide An unsaturated polyester prepolymer such as a reaction product of polyethylene glycol, maleic anhydride and glycidyl methacrylate, or the like, after esterifying polyvinyl alcohol with succinic anhydride,
Such as polyvinyl alcohol prepolymers such as those with glycidyl methacrylate added, reaction products of methyl vinyl ether-maleic anhydride copolymer and 2-hydroxyethyl acrylate, or those further reacted with glycidyl methacrylate Polyacrylic acid or maleic acid copolymer-based prepolymers, etc., as well as urethane-based prepolymers having acryloyl groups or methacryloyl groups at both ends linked to polyoxyalkylene segments and / or saturated polyester segments via urethane bonds, etc. Can be mentioned. These acrylic photopolymerizable oligomers are
A weight average molecular weight of about 2000 to 30,000 is suitable.

The photopolymerization initiator may be a conventionally known one, for example, 1-hydroxy-cyclohexyl-phenyl-ketone, 2-hydroxy-2-methyl-1.
-Phenyl-propan-1-one, 1- [4- (2-hydroxyethoxy) -phenyl] -2-hydroxy-methyl-1-propan-1-one, 2-methyl-1- [4
-(Methylthio) phenyl] -2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1
-(4-morpholinophenyl) -butanone-1-bis (2,6-dimethoxybenzoyl) -2,4,4-trimethyl-pentylphosphine oxide-bis (2,2
4,6-trimethylbenzoyl) -phenylphosphine oxide and the like can be mentioned. These photopolymerization initiators may be used alone or in combination of two or more. Its content is usually 10 vehicles.
It is preferably selected in the range of 5 to 15 parts by mass per 0 parts by mass.

The coating liquid containing the superabsorbent polymer fine particles of the present invention can be easily produced by the following steps (1) to (3). First, in step (1), an aqueous solution and / or dispersion is prepared by dissolving and / or dispersing a functional material in water. The addition amount of the functional material to water is not particularly limited as long as it can be stably maintained and the performance of the functional material can be exhibited. It may be added in an amount not less than the amount required to form a saturated aqueous solution, or an amount added so that the dispersion state can be stably maintained. The method and apparatus for dissolving or dispersing in water are not particularly limited, and known ones can be used.

Next, in step (2), the aqueous solution and / or dispersion prepared in step (1) is absorbed by superabsorbent polymer fine particles. The absorption amount is not particularly limited as long as it can be stably maintained and the performance of the functional material can be exhibited. The absorbing method and device are not particularly limited, and known ones can be used.

Next, in step (3), the superabsorbent polymer fine particles produced in step (2) are dispersed in an oil dispersion medium to prepare a coating liquid containing superabsorbent polymer fine particles. The dispersion amount is not particularly limited as long as it can be stably maintained. The method and device for dispersing are not particularly limited, and known ones can be used.

The coating liquid of the present invention is, for example, brush coating, roll coating method, kiss coating, wheeler coating, spraying method, curtain coating method, dipping method, electrostatic coating method, gravure coater, gravure offset coater, flat plate offset coater, Dylitho coater, flexo, air knife coater, bar coater, letterpress printing, intaglio printing, silk screen printing or the like to coat a predetermined portion or the entire surface of the object, if necessary, dried and cured It is possible to form a coating film that is in close contact with an object.

The object used in the present invention may be an organic material, an inorganic material, or a combination thereof, and may be a naturally derived material, a synthetic material or a combination thereof. Specifically, for example, ordinary paper is used. other,
Synthetic paper or a synthetic film of polyethylene, polyethylene terephthalate having transparency, polypropylene, vinyl chloride or the like can also be used, and carbon, glass, ceramics, metal, wood, or combinations thereof, and processed products thereof, etc. Can be mentioned. In order to improve the adhesion of the coating film, the surface of these objects can be subjected to surface treatment such as matting treatment and corona treatment. The amount of coating on the surface of the object is not particularly limited, but an example of about 1 to 30 g / m ² can be given.

To the coating liquid of the present invention, known fillers such as silica, alumina, mica, etc., carbon powder, pigments, dyes, polymerization inhibitors, thickeners, thixotropic agents, and precipitation preventive agents are used within a range that does not impair the effects of the present invention. Agents, antioxidants, dispersants, surfactants and the like can be added. Although a surfactant may be used in the present invention, the type of surfactant,
The HLB and the amount used are not particularly limited, and any of anionic surfactants, nonionic surfactants, cationic surfactants, amphoteric surfactants and the like can be used.

Since the present invention is not limited to the above embodiment, various modifications can be made without departing from the spirit of the claims.

[0039]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples. (Example 1) 300 parts by mass of a functional material [water-soluble lemon flavor (manufactured by Takasago International Corporation)] was used as a super absorbent polymer fine particle [Aquakeep 10SH-P (manufactured by Sumitomo Seika)] 1
It was absorbed in 100 parts by mass. This highly water-absorbent polymer is treated with propoxylated trimethylolpropane triacrylate [S
R-492 (manufactured by Sartomer Co.)] and 935 parts by mass of a photopolymerization initiator 2-methyl-1 [4- (methylthio) phenyl].
2-Morphopropan-1-one [trade name: Irgacure 907 (manufactured by Ciba Specialty Chemicals)] is uniformly dispersed in a solution in which 65 parts by mass of the superabsorbent polymer particles of the present invention are dispersed. A coating liquid containing was prepared.
Use a rotary screen printer to apply this coating solution to a postcard (the one with the lemon illustration printed in advance).
The coating film was cured by partially printing so as to have g / m ² and irradiating with UV. It was found that the obtained postcard was a value-added postcard with a faint lemon scent for a long time.

(Example 2) Functional material [insect repellent: β-phenylethyl alcohol aqueous solution (30% aqueous solution) 3
00 parts by mass of super absorbent polymer particles [Aquakeep 1
0SH-P (manufactured by Sumitomo Seika Co., Ltd.)] 100 parts by mass. This highly water-absorbent polymer is trimethylolpropane E
O-added triacrylate [V # 360 (manufactured by Osaka Organic Chemical Industry Co., Ltd.)] was added to 920 parts by mass of a photopolymerization initiator [VICURE.
55 (manufactured by Akzo Nobel)] was uniformly dispersed in a solution prepared by dissolving 80 parts by mass thereof to prepare a coating liquid containing superabsorbent polymer fine particles of the present invention. Using a rotary screen printer, this coating liquid was printed on tack paper at 20 g / m ² and UV irradiation was carried out to cure the coating film. It was found that the obtained tack paper was a value-added one having a function as an insect-proof sheet for a long period of time.

[0041]

The coating liquid containing superabsorbent polymer fine particles according to claim 1 of the present invention is a dispersion of the superabsorbent polymer fine particles having absorbed the aqueous solution and / or dispersion of the functional material, dispersed in an oil dispersion medium. Therefore, it does not require the labor of microencapsulation, is inexpensive, has good storage stability, and can be easily applied to an object by a known method such as printing, and the functionality absorbed by the superabsorbent polymer particles in the coating film Since the material is kept stable, the function of the functional material can be stably exhibited for a long period of time, and if the functional material is volatile or migratory, it is gradually released into the coating film and / or to the outside. Therefore, the remarkable effect that the function of the functional material can be stably exerted for a long period of time is obtained.

The coating liquid containing the superabsorbent polymer fine particles according to claim 2 of the present invention is the coating liquid according to claim 1, wherein the superabsorbent polymer fine particles are spherical fine particles. In addition to exhibiting the same effect as above, there is a further remarkable effect that they are non-adhesive to each other even when they absorb water, are excellent in handleability, and are excellent in smoothness of the coating film surface.

The coating liquid containing the superabsorbent polymer fine particles according to claim 3 of the present invention is the coating liquid according to claim 1 or 2, wherein the functional material is a fragrance, an insect repellent, a fungicide or a fungicide. Since it is a material selected from an agent, a repellent, a gas detection agent, and a deodorant, it has the same effect as that of the coating solution according to claim 1, and a further remarkable effect that a new product closely related to daily life can be provided. Play.

By the production method according to claim 4 of the present invention, the remarkable effect that the coating liquid containing the superabsorbent polymer fine particles of the present invention can be easily produced.

[Brief description of drawings]

FIG. 1 is an explanatory view schematically showing a state in which a coating liquid containing superabsorbent polymer particles of the present invention is applied to an object.

[Explanation of symbols]

1 object 2 coating film 3 highly water-absorbent polymer fine particles that have absorbed an aqueous solution and / or dispersion of a functional material 4 functional material

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Claims (4)

[Claims] 1. A coating liquid containing superabsorbent polymer fine particles, wherein superabsorbent polymer fine particles having absorbed an aqueous solution and / or dispersion of a functional material are dispersed in an oil dispersion medium. 2. The coating liquid according to claim 1, wherein the superabsorbent polymer fine particles are spherical fine particles. 3. The functional material is a material selected from a fragrance, an insect repellent, a fungicide, a fungicide, a repellent, a gas detection agent, and a deodorant, and claim 1 or claim 2. The coating liquid according to 2. 4. A method for producing a coating liquid containing superabsorbent polymer fine particles, which is produced by the following steps (1) to (3). (1) An aqueous solution and / or dispersion is prepared by dissolving and / or dispersing a functional material in water. (2) The superabsorbent polymer fine particles are allowed to absorb the aqueous solution and / or dispersion prepared in step (1). (3) The super absorbent polymer particles prepared in step (2) are dispersed in an oil dispersion medium to prepare a coating liquid containing super absorbent polymer particles.