JPH01157907A - Coating composition for exterminating insect pest - Google Patents

Abstract

PURPOSE:To obtain a coating composition for exterminating insect pests, capable of slowly exhibiting insect exterminating action of propetamphos for a long period by applying to a desired place, by containing the propetamphos in a coating. CONSTITUTION:A coating composition, obtained by containing propetamphos in an amount of 0.1-1wt.%, preferably 0.3-0.8wt.% expressed in terms of solid based on nonvolatile ingredients of the composition in a coating consisting of a room temperature curing aqueous and/or organic solvent based resin and adjusting the hydrogen ion concentration of the composition to 6.5-7.5, capable of enhancing storage stability of the propetamphos and forming a film having the ability to slowly vaporize the propetamphos, emit aversive gases for insect pests or exhibit killing activity in biting thereof by the insect pests or contacting the mucous membranes and exhibiting the afore-mentioned effects and useful for exterminating sanitary or unpleasant insect pests.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a coating composition for exterminating sanitary pests and nuisance pests.

[Conventional technology]

Research on killing and capturing sanitary pests and nuisance pests has made great progress, contributing to the purification and beautification of recent environmental hygiene. Along with this, various products have been made and have been well received. However, these products have a low preventive effect on the desired location, tool, region, etc., and can be said to be a product for after-the-fact measures. For example, places such as kitchens, warehouses, sheds for pet animals, storage areas, etc. are heavily inhabited by sanitary pests and unpleasant pests, so they are currently disinfected once or twice every few months. The cost for this is also high.

[Means for solving problems]

The present invention has been developed in view of the current situation, and is designed to prevent the inhabitation of pests before they become inhabited, to perform after-maintenance after disinfection is completed, and to prevent the inhabitation of pests while also serving as a beautification for pet sheds. The present invention has been completed by making earnest efforts for the purpose of achieving this goal. That is, the present invention provides a coating composition that exhibits a repellent effect by adding propetanephos, and this composition is composed of a water-based and/or solvent-based resin that cures at room temperature, When the substance forms a film, propetanephos gradually evaporates and releases a gas that is aversive to pests, or
Alternatively, it has the ability to exhibit biocidal power when pests bite the coating or come into contact with mucous membranes. The propetanephos used in the present invention is an asymmetric organophosphorus insecticide that has excellent performance such as low odor, high residual efficacy, and low irritation, but has slightly poor acid resistance and alkali resistance.
It has the disadvantage that its efficacy decreases if it is stored for a long period of time.

As a means to solve these drawbacks, the present invention investigates the liquid properties of the coating composition, and if the pH is 6.5 or less, propetanephos is added to the resin whose pH has been adjusted with amines such as aqueous ammonia. On the other hand, if the pH is 7.5 or higher, it is added after fine adjustment with an organic acid such as phosphoric acid or acetic acid. No adjustment is necessary if the pH of the resin is in the range of 6.5 to 7.5. When the liquidity of the coating composition falls within this range, the storage stability of the composition can be maintained and at the same time, the stability of propetanephos itself can be maintained.

The coating composition of the present invention is composed of a water-based and/or solvent-based resin that cures at room temperature. Examples of the water-based resin include acrylic resin emulsion, acrylic-styrene resin emulsion, vinylidene chloride resin emulsion, and vinyl acetic acid emulsion. They are acrylic resin emulsion, vinegar and resin emulsion, and acrylic-styrene resin emulsion.

Examples of solvent-based resins include acrylic resins, alkyd resins, styrene-acrylic resins, amphoteric ionic water-soluble acrylic resins, vinyl chloride resins, and saturated polyester resins. Preferably, acrylic resins, amphoteric acrylic resins, and alkyd resins are used. be. The coating composition also includes titanium dioxide, zinc white, yellow lead, GNPT, calcium carbonate, silica sand, talc, white carbon, antifoaming agents, antifungal agents, and interface agents commonly used as paint raw materials. Activators and the like can also be used. The amounts of these additives may be the amounts known for use in paint formulations.

Propetanephos is an oily liquid, and when used in a water-based resin, it is diluted to a desired concentration using a water-soluble solvent such as IPA, ethylene glycol, ethanol, etc., and then added. When used in solvent-based resins, add it as is.

The amount of propetanephos used is preferably 0.1% to 1% by weight, preferably 0.3 to 0.8% by weight, based on the nonvolatile content of the composition, in terms of solid content. If it is less than 0.1% by weight, the pest control effect will be small and it will only be effective for a short period of time, and if it is more than 11% by weight, it can fully exhibit its performance as a coating composition, but - economical efficiency and toxicity. However, there are problems with storage stability as a composition.

The coating composition may be applied by any method commonly used for coating paints, such as brushing, roller coating, aerosol, etc., and a formulation suitable for the coating method can be formulated.

The present invention will be specifically explained below using examples.

Example 1 Ingredients Weight % ■ Amphoteric acrylic resin 50 (Mitsubishi Yuka NV25%, pH 6) ■ Titanium dioxide 20 ■ Calcium carbonate 60 ■ Anti-settling agent (talc) 1 ■ Propetanephos (NV 95%)
)0.5, ■Water 70 Total 201.6 Ingredients (1) to (2) are placed in a tin container and dispersed, and the dispersion is completed when the particle size becomes less than $40μ for Method A and less than 0010μ for Method B. After that, add water to make the viscosity 80KU, measure the pH, add component
When the value reached the range of 7.5, component (2) was added and dispersed again to prepare a sample.

mA method; this method B: the groove of the crush gauge (0 to 100 μm
Pour the paint into the groove (the depth of the groove changes continuously, and there is a scale engraved to show the depth of the groove), squeeze it with a scraper, read the scale of the layer thickness where a lump or line appears, and remove the paint. Measure the diameter of the grains or clusters of grains present inside. Method A is used as the determination method in this case.

There is method B, and method A has a dense distribution of grains. The number of readings on the top scale that is In the B method, three or more lines are lined up. The number you read on the scale that appears in Show value.

Example 2 Ingredients Weight % ■ Acrylic resin emulsion 100 (manufactured by Dainippon Ink, pH 5, NV 50%) ■ Titanium dioxide
55■ Calcium carbonate
36■ Anti-settling agent (talc) 9■
Auxiliary agents (antifoaming agents, antifungal agents, etc.) 21 ■ Ammonia water 1.0 ■ Water 20 ■ Propetanphos (IPA, 50% 5ol) 1.6
Total: 243.6 Ingredients (1) to (2) and (2) were dispersed to a concentration of 40 μm for A method and 10 μm for B method, and after addition of components (1) and (2), the pH was measured. Add component (■) so that the pH falls within the range of 6.5 to 7.5,
Finally, component (2) was added and dispersed to prepare a sample.

Example 3 Ingredients Weight % ■ Acrylic resin (homemade) 40 ■ Titanium paste 25 ■ Propetanephos 0.4 ■ Lacquer thinner 10 ■ Anti-settling agent (wax) 0.066 total
75.46 Components (1) to (2) and (2) were dispersed, and then component (2) was added using an Iwata type viscosity cup at a rate of 15 sec/20°C to obtain an aerosol paint stock solution. The formulation for making an aerosol paint is as follows.

Stock solution 153g LP0147g Total 300g Sample Preparation The samples of Examples 1 to 3 were placed on a plywood board cut into a rectangle of 20 cm on each side, so that the amount of Example 1 was 120 g/m'.
．． 2 was applied with a brush, and Example 3 was applied with a spray, 3 coats each, one coat was for accelerated weathering test, and the next coat was 100 coats.
One was for the time irradiation test, and the last one was for 300 hours of irradiation. As a comparative example, Atom Almighty (trade name, Atom Chemical Paint, manufactured by K, water-based paint) was also applied in the same manner. After drying at room temperature for 2 days, each test was conducted.

On the test: German cockroach (Blattela ge)
rmanica: Tokyo Women's Medical University strain bred for generations in our laboratory) Test method: Test insects prepared in a waist-high petri dish are brought into contact with the sample surface, and the knockdown status of the test insects is measured over time. observed.

The test results are as follows.

〔Effect of the invention〕

According to the present invention, a coating composition containing propetanephos, which has an insect exterminating effect, can be applied to any desired location for pest extermination, and the coating composition gradually absorbs propetanephos over a long period of time. It exerts an anthelmintic effect and provides an extremely excellent anthelmintic effect.

Claims (1)

[Claims] 1. A pest control coating composition characterized by containing propetanephos in the paint. 2. The insect pest according to claim 1, wherein the paint is made of a water-based and/or organic solvent-based resin that cures at room temperature, and the hydrogen ion concentration is adjusted to 6.5 to 7.5. Repellent coating composition.