JP6230715B2 - Pest repellent coating composition and pest repellent method using the same - Google Patents

Description

  The present invention relates to a pest repellent coating composition, and more specifically, a coating composition for forming a film having a property of preventing mosquitoes and other pests from being applied by applying the composition to an inner wall of a building, and a pest using the same. Related to repelling method.

  Conventionally, various measures have been taken to protect buildings and home appliances from damage caused by pests or to satisfy consumers' interest in safety and sanitation.

For example, a white ant control coating is applied to white ants that damage wood used in buildings or the like for the purpose of prevention or extermination.
As a white ant control coating, for example, a composition containing an aqueous resin emulsion, a silane-based water repellent, colloidal silica, and an ant preventive is disclosed (Patent Document 1).
According to the composition described in Patent Document 1, it is not harmful to the environment and the human body, and can form a film that exhibits an ant-proof effect. In addition, since the white pea control coating composition contains colloidal silica, etc., a porous coating film can be formed, and by fixing the white ant control component firmly in the film, the pea control property after the coating film formation is prolonged. It is demonstrated across. However, in Patent Document 1, there is a problem that when the coating composition described above is applied after being stored for a long period of time, the white ant control property of the coating is not sufficient.

On the other hand, in order to solve the problem of insect pests such as cockroaches, it is well known to add a synthetic pyrethroid compound as an insect repellent to fiber products and paints to provide an insect repellent function.
For example, Patent Document 2 discloses an insect repellent coating that uses an insect repellent efficiently by adding an insect repellent to a top coat layer of the same color as the color coat or transparent on a color coat layer of a coated steel sheet. Steel plates have been proposed.
According to such a method, a coated steel sheet that exhibits insect repellent performance for a certain period of time can be obtained, but it is difficult to maintain the insect repellent performance for a long period of time in an environment where pests prefer to gather such as high humidity and high temperature. .

By the way, in recent years, interest in infectious diseases using mosquitoes such as dengue fever and malaria has increased due to the influence of global warming, and the need for pest repellent paint compositions targeting mosquitoes has increased.
However, even if the conventional pest repellent composition intended for pests such as white ants and cockroaches is applied as an anti-mosquito coating to the interior of a building, it does not adversely affect the human body and protects against mosquitoes flying freely in space. It is difficult to design a paint that forms a mosquito-resistant coating, and the coating formed after storage has a stable mosquito-repellent property in high humidity and high temperature environments. It is difficult to maintain mosquito protection.

JP-A-11-256076

JP 2003-127272 A

  An object of the present invention is to provide a pest repellent coating composition that exhibits stable performance even in an environment preferred by pests, in which pest repellent properties do not decrease before and after storage.

  As a result of intensive studies on the above-mentioned problems, the present inventors have used a pyrethroid compound as an insect repellent, include a specific inorganic powder and an organic solvent, and prepare a paint so that the pH falls within a specific range. The present inventors have found that the above-described problems can be solved and have reached the present invention.

  According to the pest repellent coating composition of the present invention, it is water-based, harmless to the human body, and has repellent properties against pests such as mosquitoes, so it can be safely applied to living spaces such as humans and animals. be able to.

  In addition, even after long-term storage, it is possible to form a coating film that maintains stable insect repellency even in an environment with high humidity and temperature.

The pest referred to in the pest repellent coating composition of the present invention is not particularly limited as long as it is a normal pest.
Examples include, for example, mosquitoes such as mosquitoes and mosquitoes; flies such as house flies; chironomids; flyfish; butterflies; flying pests such as ants; fleas; cockroaches; Moths; centipedes; pinworms such as millipedes.
In the present invention, a repellent effect is exhibited against flying pests, particularly mosquitoes.

  The pest repellent coating composition of the present invention includes a resin emulsion, a pyrethroid compound, an inorganic powder, and an organic solvent. Hereinafter, each component will be described.

<Resin emulsion>
In the present invention, the resin emulsion is not particularly limited as long as it has a coating film-forming ability, and conventionally known ones can be used without limitation. Specific examples thereof include acrylic resin emulsions and acrylic silicon resins. Examples include, but are not limited to, emulsions, urethane resin emulsions, fluororesin emulsions, epoxy resin emulsions, polyester resin emulsions, alkyd resin emulsions, melamine resin emulsions, vinyl acetate emulsions, silicone resin emulsions, vinyl acetate / veova resin emulsions, etc. I don't mean. These may be used alone or in combination of two or more.
Among these, acrylic resin emulsions, vinyl acetate emulsions, and silicone resin emulsions are preferable because of their excellent pest repellent durability, and silicone resin emulsions are particularly preferable.

  As an acrylic resin emulsion, for example, in the presence of water and a dispersion stabilizer, a (meth) acryloyl compound is essential, and a polymerizable unsaturated monomer component containing other polymerizable unsaturated monomers is emulsion-polymerized in one step or in multiple steps. A conventionally well-known emulsion obtained by doing can be mentioned.

  Examples of the (meth) acryloyl compound include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, i-butyl (meth) acrylate, pentyl (meth) acrylate, Directly such as hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, “isostearyl acrylate” (manufactured by Osaka Organic Chemical Co., Ltd., ISTA highly branched long chain alkyl acrylate) Chain or branched alkyl (meth) acrylate; cyclohexyl (meth) acrylate, methylcyclohexyl (meth) acrylate, t-butylcyclohexyl (meth) acrylate, isobornyl (meth) acrylate, adamanty Alicyclic alkyl (meth) acrylates such as (meth) acrylate; Aralkyl (meth) acrylates such as benzyl (meth) acrylate; Alkoxyalkyl such as 2-methoxyethyl (meth) acrylate and 2-ethoxyethyl (meth) acrylate ( (Meth) acrylate; hexafluoro-i-propyl (meth) acrylate, perfluorooctylmethyl (meth) acrylate, fluoroalkyl (meth) acrylate such as perfluorooctylethyl (meth) acrylate; (2-acryloyloxyethyl) acid phosphate Phosphate groups such as (2-methacryloyloxyethyl) acid phosphate, (2-acryloyloxypropyl) acid phosphate, (2-methacryloyloxypropyl) acid phosphate Containing (meth) acrylate; N, N-dialkylaminoalkyl (meth) acrylate such as N, N-diethylaminoethyl (meth) acrylate; (meth) acrylamide; (meth) acrylic acid; acetoacetoxyethyl (meth) acrylate, Carbonyl group-containing (meth) acryloyl monomers such as diacetone (meth) acrylamide; glycidyl (meth) acrylate, β-methylglycidyl (meth) acrylate, 3,4-epoxycyclohexylmethyl (meth) acrylate, 3,4-epoxycyclohexyl Epoxy group-containing (meth) acryloyl monomers such as ethyl (meth) acrylate and 3,4-epoxycyclohexylpropyl (meth) acrylate; and isocyanate groups such as isocyanatoethyl (meth) acrylate ( T) acryloyl monomer; alkoxysilyl group-containing (meth) acryloyl monomer such as γ-methacryloyloxypropyltrimethoxysilane, γ-methacryloyloxypropyltriethoxysilane; dicyclopentenyloxyethyl (meth) acrylate, dicyclopentenyloxypropyl ( Oxidation curable group-containing (meth) acryloyl monomers such as (meth) acrylate and dicyclopentenyl (meth) acrylate; 1,2,2,6,6-pentamethylpiperidyl (meth) acrylate, 2,2,6,6- Tetramethylpiperidinyl (meth) acrylate, etc .; 2- (methacryloyloxy) ethyltrimethylammonium chloride, 2- (methacryloyloxy) ethyltrimethylammonium bromide, methacryloylaminopro 4 such as rutrimethylammonium chloride, methacryloylaminopropyltrimethylammonium bromide, tetrabutylammonium (meth) acrylate, tetramethylammonium (meth) acrylate, trimethylbenzylammonium (meth) acrylate, 2- (methacryloyloxy) ethyltrimethylammonium dimethyl phosphate Secondary ammonium group-containing (meth) acrylate; (meth) acrylate having a polyoxyalkylene chain whose molecular end is an alkoxy group, and the like can be used, and these can be used alone or in combination of two or more.

  Other polymerizable unsaturated monomers include, for example, (meth) acrylonitrile; vinyl ester compounds such as vinyl acetate and vinyl propionate; vinyl aromatic compounds such as styrene and α-methylstyrene; maleic acid, crotonic acid, Carboxyl group-containing polymerizable unsaturated monomers such as β-carboxyethyl acrylate; (meth) acrolein, formylstyrene, vinyl alkyl ketone having 4 to 7 carbon atoms (for example, vinyl methyl ketone, vinyl ethyl ketone, vinyl butyl ketone, etc.), Carbonyl group-containing polymerizable unsaturated monomers such as acetoacetoxyallyl ester; Epoxy group-containing polymerizable unsaturated monomers such as allyl glycidyl ether; Isocyanato group-containing polymerizable monomers such as mi-propenyl-α, α-dimethylbenzyl isocyanate Saturated mono -; Alkoxysilyl group-containing polymerizable unsaturated monomers such as vinyltrimethoxysilane and vinyltriethoxysilane; epoxy group-containing polymerizable unsaturated monomers or reaction products of hydroxyl group-containing polymerizable unsaturated monomers and unsaturated fatty acids, etc. Oxidizing curable group-containing polymerizable unsaturated monomers; fluoroalkyl ethers such as fluoroalkyl trifluorovinyl ether and perfluoroalkyl trifluorovinyl ether, and the like can be used, and these can be used alone or in combination of two or more.

  These acrylic resin emulsions may be produced or commercially available. Commercially available products include, for example, “Boncoat” series, “Watersol” series (above, product name, manufactured by DIC); “Acryset” series, “Udable” series (above, product name, manufactured by Nippon Shokubai Co., Ltd.); ”Series (trade name, manufactured by Showa Polymer Co., Ltd.);“ Yodosol ”series,“ Kanebinol ”series (above, product name, manufactured by NSC Japan);“ Polytron ”,“ Polydurex ”(above, product name, Asahi Kasei Chemicals), "Rikabond" series (trade name, manufactured by Chuo Rika Kogyo Co., Ltd.); "Primal" series (trade name, manufactured by Rohm and Haas Japan); "Acronal" series (trade name, BASF Japan) "Monetic Nichigo" series (trade name, made by Movinyl Corporation); "Kanekazemulac" series "Kanebirakku" series (trade name, manufactured by Kaneka Corporation), and the like.

  As the silicone resin emulsion, any conventionally known emulsion can be used as long as it is a resin emulsion having a polyorganosiloxane chain. For example, polyorganosiloxanes obtained by polycondensation of an alkoxysilane compound or a condensate thereof are aqueous. And an emulsion dispersed, emulsified or dissolved in a medium; an emulsion obtained by combining a polyorganosiloxane with an organic polymer; and the like.

  In the above, examples of the alkoxysilane compound as a constituent component of the polyorganosiloxane include methoxy group, ethoxy group, n-propoxy group, i-propoxy group, n-butoxy group, i-butoxy group, t-butoxy group, and pentyl. The silane compound which has C1-C6 alkoxy groups, such as an oxy group and a hexyloxy group, can be mentioned. Such an alkoxy group may be substituted with a halogen atom such as a chlorine atom or a fluorine atom.

  The alkoxysilane compound may have a Si—C bond, and may further have a hydrocarbon such as an alkyl group, a cycloalkyl group, an alkenyl group, an aryl group, a substituted phenyl group, or an aralkyl group. . Here, as the alkyl group, for example, methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, i-butyl group, t-butyl group, n-pentyl group, i-pentyl group, neopentyl group. Group, t-pentyl group, n-hexyl group, n-heptyl group, n-octyl group, i-octyl group, 2,2,4-trimethylpentyl group, n-nonyl group, n-decyl group, and n- C1-C20 linear or branched alkyl groups, such as a dodecyl group, can be mentioned. A part of the alkyl group may be substituted with a halogen atom such as a chlorine atom or a fluorine atom, an acryloxy group, a methacryloxy group, a mercapto group, or an epoxycyclohexyl group.

  Examples of the cycloalkyl group include a cyclopentyl group and a cyclohexyl group. The cycloalkyl group may be partially substituted with a lower alkyl group having 1 to 6 carbon atoms, and examples of the cycloalkyl group include 4-ethylcyclohexyl group. Examples of the alkenyl group include a vinyl group, an allyl group, an n-5-hexenyl group, and a 4-vinylcyclohexenyl group; examples of the aryl group include a phenyl group, a biphenylyl group, a naphthyl group, an anthryl group, and a phenanthryl group. Substituted phenyl groups include o-, m-, p-tolyl groups, xylyl groups, and ethylphenyl groups; aralkyl groups include benzyl groups, α-, and β-phenylethyl groups, and the like. it can.

  Examples of the alkoxysilane compound having such a substituent include tetramethoxysilane, tetraethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, n-propyltrimethoxysilane, n- Propyltriethoxysilane, i-propyltrimethoxysilane, i-propyltriethoxysilane, γ-chloropropyltrimethoxysilane, γ-chloropropyltriethoxysilane, 3,3,3-trifluoropropyltrimethoxysilane, 3, 3,3-trifluoropropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, γ-methacryloxypropyltrimethoxysilane, γ-methacryloxyp Pyrtriethoxysilane, γ-mercaptopropyltrimethoxysilane, γ-mercaptopropyltriethoxysilane, 3,4-epoxycyclohexylethyltrimethoxysilane, 3,4-epoxycyclohexylethyltriethoxysilane, vinyltrimethoxysilane, vinyltri Ethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, dimethyldimethoxysilane, dimethyldiethoxysilane, diethyldimethoxysilane, diethyldiethoxysilane, di-n-propyldimethoxysilane, di-n-propyldiethoxysilane, di- i-propyldimethoxysilane, di-i-propyldiethoxysilane, divinyldimethoxysilane, divinyldiethoxysilane, diphenyldimethoxysilane, diphenyldiethoxy Silane, and the like can be given. These may be used alone or in any combination of two or more.

  The polyorganosiloxanes used in the present invention include those composed of a plurality of different alkoxysilane compounds. Two or more different polyorganosiloxanes can be used in any combination.

  Although it does not restrict | limit as a concrete commercial item of the silicone resin emulsion used by this invention, For example, "WACKER BS 45", "WACKER BS 1306", "WACKER BSR 50", "WACKER 290", "WACKER SMK" 1311 "and" WACKER SMK 2101 "(all manufactured by Asahi Kasei Wacker Silicone Co., Ltd.)," TEGO Phobe 1000S "," TEGO Phobe 1400 "," TEGO Phobe 1500N "," TEGO Phobe 1600 ", and" TEGO Phobe 16 " (Both made by Evonik Degussa).

  Examples of the vinyl acetate emulsion include a resin obtained by emulsion polymerization of vinyl acetate alone or vinyl acetate and a polymerizable unsaturated monomer component copolymerizable therewith in the presence of water and a dispersion stabilizer. An emulsion can be mentioned.

  As the polymerizable unsaturated monomer component copolymerizable with vinyl acetate, one or two of the compounds listed in the description of the (meth) acryloyl group-containing compound and other polymerizable unsaturated monomers in the acrylic resin emulsion are used. The above combinations can be mentioned.

<Pyrethroid compound>
In the present invention, the pyrethroid compound may be a natural pyrethroid compound or a synthetic pyrethroid compound. Examples of natural pyrethroid compounds include pyrethrin, cineline, and jasmolin. Synthetic pyrethroid compounds are generic names for synthetic compounds similar in chemical structure to natural pyrethroids. , Silafluophene, framethrin, phenothrin, permethrin, ciphenothrin, brathrin, etofenprox, cyfluthrin and the like, and these can be used alone or in combination of two or more.

  In the pest repellent coating composition of the present invention, from the viewpoint of the effect of pest repellent, the mass of the pyrethroid compound based on 100 parts by mass of the paint solid content is 0.15 parts by mass or more, preferably The range of 0.30 to 5.0 parts by mass is preferable.

<Inorganic powder>
The pest repellent paint composition of the present invention contains inorganic powder as an essential component. Pest repellent sustainability is further improved by including inorganic powder in the coating film.

  The inorganic powder is not particularly limited as long as the oil absorption is within the range of the present invention, and examples thereof include extender pigments. Specific examples thereof include hydrous silicon dioxide, natural crystalline silica, amorphous silica, anhydrous silica. Silicon dioxide compounds such as acids, fumed silica, silica beads; diatomaceous earth, calcium carbonate; barium sulfate; clays such as pyrophyllite, kaolinite, halloysite, sericite, montmorillonite; natural and synthetic mica; aluminum silicate, Examples thereof include magnesium silicate, calcium silicate, magnesium carbonate, and aluminum oxide, and these can be used alone or in combination of two or more.

In the present invention, the inorganic powder is characterized in that the oil absorption is 320 ml / 100 g or less, and particularly suitable within the range of 5 to 300 ml / 100 g.
If the oil absorption exceeds 320 ml / 100 g, the pest repellent property of the coating film formed from the pest repellent coating composition after storage is insufficient, which is not preferable.
In this specification, the amount of oil absorption is determined by measuring by the oil method in boiled sea urchin in accordance with the provisions of JIS K 5101.

As a compounding quantity of inorganic powder, it exists in the range of 10-200 mass parts on the basis of 100 mass parts of resin emulsion solid content, Preferably the inside of the range of 15-150 mass parts is suitable.
If the blending amount of the inorganic powder is out of this range, the formed film does not exhibit the pest repellency sufficiently, which is not preferable.

<Organic solvent>
The pest repellent coating composition of the present invention contains an organic solvent. By including an organic solvent, the pyrethroid compound is uniformly dispersed in the coating film, and the pest repellent performance of the coating film can be further improved, and the coating film formed from the paint after storage is also stable. It has the effect of being able to demonstrate pest repellent.

  In the present invention, the organic solvent is not particularly limited and conventionally known ones can be used. Specifically, alcohols such as methanol, ethanol, i-propanol, n-butanol, i-butanol; Ethers such as dioxane and tetrahydrofuran; ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol mono-n-propyl ether, ethylene glycol mono-i-propyl ether, ethylene glycol mono-n-butyl ether, ethylene glycol mono-i Ethylene glycol ethers such as butyl ether and ethylene glycol mono-t-butyl ether; diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol -Diethylene glycol ethers such as n-propyl ether, diethylene glycol mono-i-propyl ether, diethylene glycol mono-n-butyl ether, diethylene glycol mono-i-butyl ether, diethylene glycol mono-t-butyl ether, diethylene glycol monoethyl ether acetate; propylene glycol monomethyl ether , Propylene glycol ethers such as propylene glycol monoethyl ether, propylene glycol mono-n-propyl ether, propylene glycol mono-i-propyl ether; dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol mono-n -Propyl ether, dipropylene glycol mono dipropylene glycol ethers such as i-propyl ether; esters such as ethyl acetate, butyl acetate, acetic acid i-butyl, 3-methoxybutyl acetate; formamide, N, N-dimethylformamide, N, N-dimethylacetamide, Nitrogen-containing organic solvents such as N, N-diethylformamide, acetamide, N-methylformamide, N-methylpyrrolidone, nitropropane, nitrobenzene and 2-pyrrolidone; paraffinic hydrocarbons such as octane, nonane, decane, dodecane and tetradecane Naphthenic hydrocarbons such as cyclohexane and methylcyclohexane; aromatic hydrocarbons such as toluene, xylene, ethylbenzene, dodecylbenzene, methylnaphthalene, di-i-propylnaphthalene, and the like. It can be used in combination of more than one species.

  In the present invention, the amount of the organic solvent is in the range of 0.5 to 20.0 parts by mass, preferably in the range of 1.0 to 10.0 parts by mass, based on 100 parts by mass of the solid content of the resin emulsion. It is suitable to be in

  Particularly in the present invention, paraffinic hydrocarbons and aromatic hydrocarbons are preferred as the organic solvent.

  Specific examples of such an organic solvent include i-paraffin and alkylbenzene, and these can be used alone or in combination of two or more.

<Surfactant>
The pest repellent coating composition of the present invention suitably contains a surfactant.
As a result, together with the organic solvent, the pyrethroid compound is uniformly dispersed in the coating film, and the pest repellent performance of the coating film can be further improved, and the coating film formed from the paint after storage is also stable. And pest repellent properties can be exhibited.

  The surfactant is not particularly limited, and conventionally known surfactants can be used. Specific examples include polyoxyalkylene allyl phenyl ether, polyoxyalkylene alkyl ether, polyoxyethylene alkyl ether, polyoxyethylene. Alkyl phenyl ether, polyoxyethylene allyl phenyl ether, polyoxyethylene styryl phenyl ether, polyoxyethylene alkyl phenyl ether formaldehyde condensate, polyoxyethylene-polyoxypropylene block polymer, polyoxyethylene-polyoxypropylene block polymer alkylphenyl ether , Polyoxyalkylene sorbitol fatty acid ester, sorbitan fatty acid ester, polyoxyethylene fatty acid ester, polyoxye Nonionic surfactants such as Lensorbitan fatty acid ester, polyoxyalkylene castor oil ether, polyoxyalkylene hydrogenated castor oil, polyoxyalkylene hydrogenated castor oil ether, polyethylene glycol fatty acid ester, polyoxyalkylene glycerin; alkyl sulfate, poly Oxyethylene alkyl ether sulfate, polyoxyethylene alkyl phenyl ether sulfate, polyoxyethylene benzyl (or styryl) phenyl ether sulfate, polyoxyethylene-polyoxypropylene block polymer sulfate, alkyl sulfonate, dialkyl or dialkenyl Sulfosuccinate, alkylbenzene sulfonate, mono or dialkyl naphthalene sulfonate, naphthalene sulfonate formaldehyde condensate, Gunin sulfonate, polyoxyethylene alkyl phenyl ether sulfonate, polyoxyethylene alkyl ether sulfosuccinate, polyoxyethylene alkyl ether phosphate, polyoxyethylene, mono- or dialkyl phenyl ether phosphate, polyoxyethylene benzyl (or styryl) phenyl Anionic surfactants such as ether phosphate, polyoxyethylene benzyl (or styryl) phenyl ether phosphate or polyoxyethylene-polyoxypropylene block polymer phosphate; alkyltrimethylammonium chloride, polyoxyethylene alkylmethylammonium chloride, mono or dialkylmethyl Ammonium chloride, alkylpentamethylpropylene di Cationic surfactants such as amine chloride, alkyldimethylbenzalkonium chloride, and benzethonium chloride; amphoteric surfactants such as dialkyldiaminoethylbetaine and alkyldimethylbenzylbetaine, etc., may be used alone or in combination of two or more. Can be used.

  In particular, in the present invention, a nonionic surfactant and an anionic surfactant are preferable as the surfactant.

  In the present invention, the pyrethroid compound, the organic solvent, and the surfactant can be blended at any stage of the production of the pest repellent coating composition, but the component containing the pyrethroid compound, the organic solvent, and the surfactant is made into a drug. It is appropriate to prepare the product in advance and stir and mix the drug product together with other components.

  In the said chemical | medical agent, components, such as a synergist, antioxidant, a ultraviolet absorber, can be included as needed.

<Pest repellent paint composition>
The pest repellent coating composition of the present invention further includes a pH adjuster, a thickener, a wetting agent, a preservative, a modifying resin other than a resin emulsion, a color pigment, a film-forming aid, and an ultraviolet absorber, if necessary. In addition, paint additives such as a light stabilizer and a surface conditioner can be appropriately blended.

  Among these, examples of the pH adjuster include various acids such as inorganic acids and organic acids, inorganic alkalis such as sodium hydroxide, and various amine compounds, and amine compounds are preferably used. The amine compound is not particularly limited, and examples thereof include ammonia, diethylamine, triethylamine, monoethanolamine, diethanolamine, triethanolamine, dimethylethanolamine, and diethylethanolamine.

Moreover, as a thickener, what is normally used as a thickener by the paint use etc. can be used without a restriction | limiting, For example, water-soluble fibrin derivatives, such as carboxymethyl cellulose, methyl cellulose, and hydroxyethyl cellulose; Polysaccharides such as guar gum, xanthan gum and locust bean gum; inorganic thickeners such as bentonite, montmorillonite, colloidal alumina; polyvinyl alcohol, polyvinyl pyrrolidone, sodium polyacrylate, polyacrylate copolymer, polyester Examples thereof include terdialkyl esters, partial esters of vinyl methyl ether-maleic anhydride copolymer, sodium alginate, and the like. Among these, water-soluble fiber derivatives and polysaccharides, such as water-soluble fiber derivatives, polysaccharides, polyvinyl alcohol, and inorganic thickeners, can be preferably used from the viewpoint of coating workability.
The thickener is suitably contained in the range of 0.1 to 10 parts, preferably 0.2 to 5 parts, based on 100 parts by mass of the solid content of the resin emulsion.

  The proper pH range of the pest repellent coating composition of the present invention obtained as described above is less than 9.0, and more preferably in the range of 7.0 to 8.5. If the pH exceeds 9.0, a stable pest repellent coating film can be obtained in the initial stage after the production of the paint, but the pest repellent is insufficient after storage of the paint.

  In this specification, the pH is measured with a pH meter after adjusting the temperature of the sealed paint to 20 ° C.

  The article to be coated with the pest repellent coating composition of the present invention is not particularly limited, for example, wood board, plywood, medium density fiber board, plastic board, cement mortar, concrete board, PC panel, Examples include materials such as ALC panels, asbestos slate, gypsum board, particle board, foam cement board, wood cement board, calcium silicate board, paper, metal, etc. A new coating film may be provided.

  The application of the pest repellent coating composition can be performed by a conventionally known application method without particular limitation, for example, a roller, a brush, a spray, a roll coating, a flow coating, or the like, and can be cured even at room temperature drying conditions. If necessary, forced drying or heat drying can also be performed.

  If the pest repellent coating film obtained as described above is a clear coating film, it can improve the texture without changing the hue appearance of the object to be coated, but it is suitable depending on the application. Even a colored coating film containing a colorant such as a pigment may be used.

Further, in the present invention, in order to sufficiently exhibit the pest repellent function, the mass of the pyrethroid compound contained in the coating film formed from the pest repellent coating composition of the present invention per 1 m ^{2 of the} coating surface. It is appropriate to adjust the coating amount in a range of 0.2 to 10.0 g / m ² , more preferably 0.5 to 8.0 g / m ² to obtain the above insect pest repellent coating film. .

  Hereinafter, the present invention will be further described with reference to examples. Here, “part” and “%” mean “part by mass” and “% by mass”, respectively.

<Manufacture of anti-mosquito coatings>
Examples 1-2, Reference Examples 1-4, and Comparative Examples 1-7
Various mosquito-prevention paints (A) to (M) were obtained by stirring and mixing with the composition shown in Table 1. (Note) in Table 1 is as follows.
(Note) “Nip seal E-1009”: trade name, manufactured by Tosoh Silica, hydrous silicon dioxide, oil absorption 250 ml / 100 g
(Note) “CELITE 281”: trade name, Celite Co. Company-made, calcined diatomaceous earth, oil absorption 140ml / 100g
(Note) “MIN-U-SIL30”: trade name, US. Made by SILICA, natural crystalline silica oil absorption 26ml / 100g
(Note) “Tankar MC-75”: trade name, manufactured by Shiraishi Calcium Co., Ltd., calcium carbonate, oil absorption 19 ml / 100 g
(Note) “SM clay”: trade name, manufactured by Fujilite Kogyo Co., Ltd., hydrous clay, oil absorption 32 ml / 100 g
(Note) "G-80": trade name, Sankyo Flour Mills, calcium carbonate, oil absorption 9ml / 100g
(Note) "Silicia 350": trade name, manufactured by Fuji Syria Chemical Co., Ltd., hydrous silicon dioxide, oil absorption 325ml / 100g
(Note) “WACKER BS 45”: manufactured by Asahi Kasei Wacker Silicone, silicone resin emulsion, solid content 50%.
(Note) “WACKER BS 1306”: manufactured by Asahi Kasei Wacker Silicone, modified silicone resin emulsion, solid content 55%.
(Note) “TEGO Phobe 1600”: Evonik Degussa, silicone resin emulsion (containing polydimethylsiloxane), solid content 50%.
(Note) “TEGO Phobe 1600”: Evonik Degussa, silicone resin emulsion (containing polymethyl-phenylsiloxane), solid content 50%.
(Note) “Boncoat CG-8370”: trade name, manufactured by DIC, acrylic / styrene copolymer resin emulsion, solid content 50%
(Note) “Boncoat 6620EF”: trade name, manufactured by DIC, vinyl acetate / veova copolymer resin emulsion, solid content 50%
(Note) Drug (P-1): Permethrin 40%, “Alken L” 24.0%, “IP Solvent 2028” 15.0%, N-methylpyrrolidone 4.0%, “New Calgen CP-120” 7.0%, "New Calgen KL-30" 10.0%
(Note) Drug (P-2): Permethrin 40%, “Alken L” 28.0%, “IP Solvent 2028” 15.0%, “New Calgen KL-30” 17.0%
(Note) Drug (P-3): Permethrin 40%, “Alken L” 24.0%, “IP Solvent 2028” 20.0%, N-methylpyrrolidone 4.0%, “New Calgen CP-120” 7.0%, "New Calgen KL-30" 5.0%
(Note) Drug (P-4): phenothrin 30%, ethyl acetate 70%,
(Note) Drug (P-5): Deltamethrin 30%, ethanol 70%
(Note) “Alken L”: manufactured by JX Nippon Oil & Energy, aromatic hydrocarbons (Note) “IP Solvent 2028”: manufactured by Idemitsu Kosan Co., Ltd., paraffinic hydrocarbons (Note) “New Calgen CP-120”: Takemoto Yushi Co., Ltd., polyoxyalkylene emulsifier (Note) “New Calgen KL-30”: Takemoto Yushi Co., Ltd., polyoxyalkylene emulsifier

<Creation of anti-mosquito treatment board>
Examples 7-8 , Reference Examples 5-8, and Comparative Examples 8-14
On the plywood (28 cm × 20 cm), the anti-mosquito coatings (A) to (M) obtained in the above-mentioned Examples , Reference Examples and Comparative Examples were applied at a coating amount of 100 g / m ² with a brush, and 2 at room temperature. After drying for a while, each mosquito-proof board was prepared. In Reference Examples 6 to 7 and Comparative Example 10, an additional coating amount of 100 g / m ² was applied on the coating film made of the anti-mosquito coating and dried at room temperature for 2 weeks to obtain a anti-mosquito treatment plate.

<Preparation of anti-mosquito treatment board treated with anti-mosquito coating after storage>
A mosquito-prevention treatment plate was prepared in the same manner using the mosquito-prevention paints (A) to (M) obtained in the above Examples , Reference Examples and Comparative Examples stored at 40 ° C. for one month as the treatment liquid.

<Mosquito repellent test>
(1) A mosquito-proof treatment plate was stretched on one side of the wall surface (long side) of the test cage (18 cm × 28 cm, height 20 cm) to make a mosquito-proof treatment zone, and a blank plate was put on the other side to make a non-treatment zone. The wall surface (short side), top surface, and bottom surface were not stretched, and the cage net was left as a test box.
(2) 100-500 adult Aedes albopictus adults were released in the test box created in (1).
(3) After 1, 2, 3, 4, and 5 hours, the test insects that stopped in the mosquito-proof treatment area and the non-treatment area were counted, and the repelling rate (%) was calculated by the following equation. The count of the number of mosquitoes was repeated 3 times every 3 minutes to obtain the total number.
Repelling rate (%) =
(Number of mosquitoes remaining in the untreated zone) /
{(Number of mosquitoes remaining in anti-mosquito treatment area) + (Number of mosquitoes remaining in non-treatment area)} × 100
(4) The average value of the repellent rate (%) obtained in 1, 2, 3, 4 and 5 hours was evaluated according to the following four criteria. The results are shown in Table 2.
A: The average value of the repelling rate (%) is 80% or more,
◯: The average repelling rate (%) is 70% or more and less than 80%,
(Triangle | delta): The average value of repelling rate (%) is 60% or more and less than 70%,
X: The average value of repelling rate (%) is less than 60%.

Claims (11)

Resin emulsion, pyrethroid compound, silicon dioxide compound inorganic powder having an oil absorption of 320 ml / 100 g or less, and organic solvent, and the mass of silicon dioxide compound inorganic powder based on 100 parts by mass of resin emulsion solids 10 to 200 parts by mass, the mass of the organic solvent is 0.5 to 20.0 parts by mass, the mass of the pyrethroid compound based on 100 parts by mass of the coating solid content is 0.15 parts by mass or more, and the temperature is A pest repellent paint composition, wherein the paint pH at 20 ° C is less than 9.0.   The pest repellent coating composition according to claim 1, wherein the resin emulsion is a silicone resin emulsion.   The pest repellent coating composition according to claim 1, wherein the pyrethroid compound is at least one selected from the group consisting of permethrin, α-cypermethrin, phenothrin, and deltamethrin.   The pest repellent paint composition according to any one of claims 1 to 3, wherein the organic solvent is a paraffinic hydrocarbon and / or an aromatic hydrocarbon.   The pest repellent coating composition according to any one of claims 1 to 4, further comprising a surfactant.   The pest repellent coating composition according to claim 5, wherein the surfactant is a nonionic surfactant and / or an anionic surfactant.   A pest repellent coating film formed from the pest repellent paint composition according to any one of claims 1 to 6.   The pest repellent coating film according to claim 7, which is a clear coating film. The amount of pyrethroid compound is 0.2~10.0g / m ^2, pest repellent coating according to claim 7 or 8.   A pest repellent method comprising applying the pest repellent paint composition according to any one of claims 1 to 6 to an object to be coated.   An article having pest repellent properties obtained by the method according to claim 10.