JPH11256076A - Coating agent for termite control - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a coating agent which is esp. highly safe and can retain ant-proof effects for a long term by compounding an inorg. air-permeable water- repellent coating agent comprising colloidal silica, a silane-based water-repellent agent, an aq. resin emulsion, other inorg. substances, etc., with an ant-proof agent. SOLUTION: The content of colloidal silica is 1-20 wt.% of the water-repellent coating material. An aq. acrylic emulsion is esp. pref. as the aq. resin emulsion. Examples of the silane-based water-repellent agent are sodium trimethylsilylsulfonate and trimethylsilylamine, and the amt. of the water- repellent agent added is about 10-30 wt.% of the sum of colloidal silica and the aq. resin emulsion (solid basis). Pref., the ant-proof agent is a pyrethroid- based one or a pyrethroid-like one and is compounded in an amt. of 0.01-10 wt.% of the inorg. air-permeable water-repellent coating agent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating material for termite control, and more particularly, to an inorganic air-permeable water-repellent coating material containing colloidal silica as a binder and having excellent air-permeability and water-repellency. The present invention relates to a coating material containing a termite repellent for termites, which can maintain the termite-control effect of a highly safe termite repellent for a long period of time.

[0002]

2. Description of the Related Art Recently, measures to prevent or control termites that damage wood in wooden houses, other buildings, structures, and the like (control measures) have been increasing. Screamed as a problem. Under these circumstances, as a termite preventive or pesticide, for example, i) CCA drugs (compounds of chromium, copper, and arsenic) which are used by injecting into wood under pressure, and ii) xylem in the form of emulsions or oils Organophosphorus drugs such as chlorpyrifos that are directly applied and used are mainly known. However, the CCA-based drug described in i) above has a problem of environmental pollution due to the generation of new toxic substances at the time of incineration disposal, while the ii) organophosphorus-based drug has a high toxicity to the human body, and a health hazard has been reported. Have been. In addition, in the case of an emulsion or an oil which is applied and sprayed, there is a disadvantage that the medicine drips from the application surface and a sufficient application amount cannot be maintained, or the volatility is high and a long term ant-control effect cannot be maintained.

[0003]

Means for Solving the Problems Accordingly, the present inventors have:
As a result of various studies on the control measures of such termites, as a binder of the above-mentioned preventive agent or pesticide (hereinafter, collectively referred to as termiticide), colloidal silica-containing inorganic air-permeable type having excellent air permeability and water repellency was used. If a water-repellent coating material is used, a microporous coating made of colloidal silica or the like absorbs and holds the termiticide, and the coating film formed after application exhibits a sustained release effect due to the gas permeability. It was found that by imparting water, not only the durability including water resistance and weather resistance was improved but also the outflow of the termiticide could be effectively prevented, and it was found that the termite-controlling effect could be maintained for a long time, and the present invention was completed. Was.

That is, the present invention relates to a colloidal silica,
An object of the present invention is to provide a coating material for termite control, wherein a termite-controlling agent is added to an inorganic air-permeable water-repellent paint composed of a silane-based water-repellent, an aqueous resin emulsion, and other inorganic substances.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The above-mentioned inorganic air-permeable water-repellent paint used in the present invention is prepared by adding a silane-based water-repellent coating to an aqueous resin emulsion containing colloidal silica (an aqueous dispersion of silica having a particle diameter of about 1 to 100 mm). Add liquids and other inorganic substances,
Furthermore, if necessary, an appropriate amount of an organic substance (methyl ethyl cellulose, polyvinyl acetate emulsion, polystyrene-butadiene emulsion, polyamide emulsion, etc.), colored pigment, extender pigment, rust stopper pigment, thickener, filler, dispersant It is composed of a system containing a viscosity modifier and an antifoaming agent, and provides excellent durability, adhesiveness, water vapor permeability (moisture permeability), water repellency and stain resistance. The content of the colloidal silica is usually 1 to 20% of the total amount of the paint.
(Weight%, the same applies hereinafter).

[0006] The aqueous resin emulsion may be any aqueous dispersion containing various resins, as long as it can form a continuous film by removing (drying) water. Emulsions are preferred.
Such an acrylic aqueous emulsion refers to at least one of (meth) acrylates (eg, ethyl acrylate, ethyl methacrylate, 2-ethylhexyl acrylate, hydroxypropyl methacrylate, etc.) alone, or about 10 mol% or less of styrene, ethylene, This is an aqueous emulsion obtained by emulsion-polymerizing a mixture of vinyl acetate, acrylonitrile, butadiene and other monomers with water.

Examples of the silane-based water repellent include sodium trimethylsilylsulfonate, sodium triethylsilylsulfonate, trimethylsilylamine, trimethylsilylacetamide, sodium trimethylsilylcarboxylate, and the like. The amount of addition is usually 100% of the total solid content of the colloidal silica and the aqueous resin emulsion.
Parts (parts by weight, hereinafter the same) may be set to 10 to 30 parts. Examples of the other inorganic substance include amorphous silica, quartz, cristobalite, fused silica, bentonite, alumina powder, fused alumina, sillimanite, mullite, zirconia, titanium, magnesia, and the like. Usually, the addition amount may be set to 100 to 1000 parts with respect to 100 parts of the total amount of both the solid content of the colloidal silica and the aqueous resin emulsion and the silane-based water repellent.

The termiticide used in the present invention refers to a chemical approved by the Japanese Termite Association for the purpose of preventing and / or controlling termites, and is appropriately selected and used depending on the type of termite. be able to. In particular, use of pyrethroids or pyrethroid-like, which are highly safe for the human body, such as permethrin, allethrin, tralomethrin, silafluofen, etofenprox, and phenothrin, are preferred. When a pyrethroid is used, usually, an organic iodine preservative (for example, 4-chlorophenyl-3-iodopropargyl formal, diiodomethyl-p-trisulfone, 1-bromo-3-ethoxycarbonyloloxy-1, 2-diiodo-1-propene, 3-iodo-2-propynyl / N-butyl carbamate, etc.) and synergists (for example, octachlorodipropyl ether, N- (2-ethylhexyl) -bicyclo [2.
2.1] -hepta-5-ene-2,3-dicarboximide) in an appropriate amount. The termiticide compounding amount is usually
0.01 to 100 parts of the inorganic ventilation type water-repellent paint
What is necessary is just to select in the range of 10 parts. If less than 0.01 part,
Termite control effect is insufficient, and if it exceeds 10 parts,
It tends to be economically disadvantaged.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The termite controlling coating material according to the present invention is composed of a system in which a termite-controlling agent is blended with the above-mentioned predetermined ratio of inorganic ventilation type water-repellent paint. A coating film having a desired durability and termite-controlling performance is formed by applying a coating amount of 50 to 600 g / m ² (by spraying, brushing, roller coating, etc.) and then curing and drying under natural conditions. You.

[0010]

Next, the present invention will be specifically described with reference to examples and comparative examples. Example 1 (1) Inorganic air-permeable water-repellent paint The composition of the paint is as follows. The composition of the acrylic water-based emulsion 30 colloidal silica 10 thickening aqueous 10 quartz powder 100 clay 200 micronized white marble 50 titanium oxide 50 Water 50 Total 500 (2) inorganic vented termite controlling coating material (1) To 100 parts of the water-repellent paint, 0.1 part of a pyrethroid-based termiticide (silafluofen) and 1 part of an organic iodine-based preservative (3-iodo-2-propynyl / N-butylcarbamate) are added, followed by uniform stirring.

Comparative Example 1 The inorganic air-permeable water-repellent paint of Example 1 / (1) itself was used. Comparative Example 2 A solution prepared by diluting a pyrethroid-based termiticide and an organic iodine-based preservative used in Example 1 with a solvent is used. Comparative Example 3 An organic phosphorus-based drug, which has been frequently used, is diluted with an organic solvent. Comparative Example 4 Untreated wood was subjected to the test.

Performance Tests The following tests A to C were performed, and the results are shown in Table 1. A. Termite Control Efficacy Test Each of the treatment agents of Example 1 and Comparative Examples 1 to 3 was applied to a 20 × 20 × 10 mm red pine wood chip at an application amount of 100 to 120 g / m ² and dried at room temperature for 10 days (initial stage). ; Or 30
Second water immersion → 26 ° C wet desiccator × 4hr → 40 ° C × 2
After repeating the cycle of 0 hr 30 times (weather-proof operation), the mixture is cured at room temperature, and the termite control performance is evaluated. :: Weight loss rate of wood piece <3% △: Weight loss rate of wood piece is 3 to 20% ×: Weight loss rate of wood piece> 20%

B. Safety Evaluate according to the following criteria. :: Acute toxicity (LD ₅₀ ) of the drug used in mice was 1000 mg / k
g do not use more or agent △: the LD ₅₀ is 300 mg / kg or more ×: the LD ₅₀ is 300 mg / less than kg C. Vertical surface applicability Example 1
And 100 to 120 g / m ² of each of the treating agents of Comparative Examples 1 to 3.
Was spray-coated at a coating amount of, and the dripping state at that time was visually evaluated. :: No dripping of the treating agent was observed ×: Dripping of the treating agent was observed

[0014]

[Table 1]

[0015]

According to the results shown in Table 1, the treatment agent of Example 1 (the coating material of the present invention) shows that the termite-controlling effect in weathering operation using a highly safe termite-controlling agent (that is, long-term protection). (Ant effect) can be maintained, so there is no need to use drugs with a high risk for the human body, animals and plants, in other words, the use of drugs that are safe even with a slightly lower It becomes possible. In addition, the problem of dripping is also greatly reduced in the vertical surface application, and it is possible to save the medicine.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Isamu Komori 7-1, Akita-cho, Takatsuki-shi, Osaka Sunstar Giken Co., Ltd. (72) Inventor Shigeru Shigeru 7-1, Akita-cho, Takatsuki-shi, Osaka Sunstar Giken Co., Ltd. (72) Inventor Ai Tanaka 7-1, Akita-cho, Takatsuki-shi, Osaka Sunstar Giken Co., Ltd. (72) Inventor Tomoki Kobayashi 2-1-48 Umecho, Konohana-ku, Osaka, Osaka (72) Inventor Tadashi Doi 3-3-36-1010 Nanko Naka, Suminoe-ku, Osaka-shi, Osaka

Claims (3)

[Claims] 1. A termite-controlling coating material characterized in that a termite-controlling agent is added to an inorganic air-permeable water-repellent coating comprising colloidal silica, a silane-based water-repellent, an aqueous resin emulsion and other inorganic substances. . 2. The termiticide is a pyrethroid or pyrethroid-like termiticide, and its compounding amount is 0.01 to 10 parts by weight based on 100 parts by weight of the inorganic air-permeable water-repellent paint. 2. The coating material for termite control according to 1. 3. The coating material for termite control according to claim 1, wherein the termiticide is pyrethroid-based, and an organic iodine-based preservative is used in combination therewith.