JP2756614B2 - Foamed aerosol insecticide and application method using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foamed aerosol insecticide suitable for controlling various resident pests such as cockroaches and the like, and a coating method using the same.

[0002]

2. Description of the Related Art Conventionally, as a method for exterminating household pests, a method of spraying an insecticide or a method of using a catcher including an adhesive tape is known. In the former spray type, the insecticide is scattered in the air by spraying, so that there is a risk of adhesion to the human body or inhalation by breathing. On the other hand, the method using a catcher has a problem that there is no prevention effect on the generation and proliferation of pests and only a part of house pests can be eliminated.

Further, as disclosed in Japanese Utility Model Publication No. Sho 62-16840, a pest control device having an application tip in an insecticide storage tube has been proposed recently. Particularly on the vertical surface, there are disadvantages such as a non-uniform amount of the treatment chemical due to liquid dripping and the like, and a desired extermination effect cannot be obtained, or contamination of the treatment surface.

[0004]

DISCLOSURE OF THE INVENTION The present invention focuses on a foam-coated insecticide which is not dangerous for inhaling flying chemicals for insecticides used for controlling pests such as cockroaches. The purpose of the present invention is to satisfy all the demands such as uniform coating, prevention of liquid dripping, and prevention of contamination, which have not been sufficiently fulfilled.

[0005]

In order to achieve the above object, the present invention provides (a) an insecticide component of 0.05 to 25.0% by weight, and (b) a nonionic surfactant of 0.1 to 5. 0% by weight, (c) 0.01 to 3.0% by weight of a thickener, (d) 40 to 70% by weight of a lower alcohol, (e) water (remainder); The present invention relates to a foamed aerosol insecticide in which an inner solution containing 30% by weight or less of a propellant is filled in an aerosol container and the inner solution is ejected in a foamy state, and a coating method using the same.

[0006]

The insecticidal component used in the present invention includes pyrethroid insecticides, pyrethroid-like insecticides, organophosphorus agents,
Examples include carbamates and insect growth disrupters, but from the viewpoint of efficacy and safety, pyrethroid insecticides,
Pyrethroid-like insecticides are preferred. For example, phenothrin, cyphenothrin, arethrin, phthalthrine, resmethrin, framethrin, pramethrin, permethrin, cypermethrin, etofenprox, silafluofen and the like can be exemplified, but not limited thereto, and optical isomers or geometric isomers Is present, of course, each of them as well as any mixtures are encompassed. In the present invention, one or more of these pesticidal components are contained in the pesticidal stock solution in an amount of 0.05 to 2%.
Although 5.0% by weight is blended, a multipurpose composition can be obtained by appropriately blending repellents, fungicides, fungicides, synergists, stabilizers, fragrances and the like.

[0007] The nonionic surfactant is added to the foamed aerosol insecticide of the present invention in order to impart foaming property and to stably and uniformly disperse the insecticidal component in the stock solution. For example, alkyl allyl ether type such as polyoxyethylene nonyl phenyl ether, alkyl ether type such as polyoxyethylene lauryl ether, alkyl ester type such as polyoxyethylene oleate,
Examples include alkylamine type such as polyoxyethylene laurylamine, polyhydric alcohol type such as sorbitan monooleate and polyoxyethylene sorbitan oleate, and alkyl allyl ether formalin condensate. These are 1
It can also be used as a species or a mixture of two or more,
0.1 to 5.0% by weight is blended in the insecticidal stock solution. In addition,
Higher alcohols such as stearyl alcohol and cetanol can also be added as foam control agents.

In the foamed aerosol insecticide of the present invention,
In order to suppress the spreading of the liquid and obtain good coating performance,
Addition of a thickener is required. As the thickener, water-soluble resin such as acrylic acid, polyvinyl alcohol, gum arabic, carrageenan, water-soluble polymers such as CMC,
Examples include, but are not limited to, water-soluble silicone resins.

The lower alcohol used in the present invention includes ethanol, n-propanol, isopropanol, n-butanol and the like.
７０70% by weight. When the content is less than 40% by weight, the solubility of the insecticidal component is inferior, and when it exceeds 70% by weight, the foaming property deteriorates, which is not suitable. The lower alcohol used may be modified or unmodified, as long as the properties are not impaired, and other types of solvents, for example,
Acetone, ketone solvents such as methyl ethyl ketone, polyhydric alcohols such as ethylene glycol and propylene glycol, ethers such as diethyl ether, ethylene glycol monoethyl ether, diethylene glycol monobutyl ether, isopropyl myristate,
Esters such as butyl stearate and castor oil, kerosene, and kerosene may be appropriately added.

The remaining part of the stock solution in the foamed aerosol insecticide of the present invention is mixed with water at a ratio of about 30 to 50% by weight. On the other hand, if the mixing ratio of water is less than about 30%, there is a problem that the foaming stability is inferior and the application becomes uneven. On the contrary, if it exceeds 50% by weight, the insecticidal component is dissolved. There is a problem that it becomes difficult. In addition, it is preferable to use purified water subjected to treatment such as deionization in order to stably maintain the properties of the insecticidal stock solution.

The foamed aerosol insecticide of the present invention is prepared by filling an aerosol container with a content liquid comprising 70% by weight or more of the thus obtained insecticide stock solution and 30% by weight or less of a propellant. Examples of the propellant include liquefied petroleum gas such as propane and butane, dimethyl ether, fluorocarbon gas, carbon dioxide gas, and nitrogen gas. Dimethyl ether is useful for enhancing defoaming properties. For example, a mixed gas of dimethyl ether and liquefied petroleum gas, the former being 50% by weight
It was recognized that the above gave particularly good results in coating performance.

The present invention is characterized in that an aerosol container is filled with the above-mentioned internal solution formulation having excellent foaming and defoaming properties, and the internal solution is sprayed out and applied. The structure of the aerosol container consists of a pressure-resistant container and an injection valve,
Although no special mechanism is required as compared with the conventional spray aerosol, for example, the ejection amount can be appropriately selected according to the purpose by changing the nozzle hole diameter from the conventional one.

The foamed aerosol insecticide of the present invention thus obtained has a stable foaming property, so that it can be applied uniformly, and there is no danger of liquid dripping as in the case of applying a solution. The spread of the liquid is suppressed by the action of the agent, so that the applicability and the usability are extremely good. Furthermore, there is also an advantage that the defoaming property is high and the feeling of contamination after the treatment is small. Therefore, the present invention relates to a kitchen in a house,
Apply coating treatment to living room, entrance, window sash, wall, etc.
An object of the present invention is to provide a foamed aerosol insecticide exhibiting high control and prevention effects against cockroaches, ants, mites, bed bugs, and various pests, and an application method using the same.

Next, the present invention will be described in more detail with reference to Test Examples and Examples, but the present invention is not limited to the following examples unless it exceeds the gist thereof.

Test Example 1 An insecticide solution having the following formulation and a content solution comprising a propellant were filled in a pressure-resistant aerosol container, and a spray valve was charged to prepare a foamed aerosol pesticide. The coating was sprayed onto the decora plate for about 10 seconds from a distance of about 10 cm, and the coating performance and usability were examined.

[0016]

[Table 1]

As a result of the test, the foamed aerosol insecticide of the present invention has excellent foaming stability and defoaming properties, has a good application state, does not scatter a chemical solution unlike a conventional spray aerosol, and exudes a solution. It was recognized that a very efficient and practical foam coating method was provided because there was little concern about liquid dripping seen in the method of coating. On the other hand, as shown by the control foamed aerosol insecticide, when the compounding amount of the alcoholic solvent used for the preparation of the insecticide stock solution is 70% by weight or more, or 40% by weight or less, or the ratio of the insecticide stock solution / propellant is When it was reduced to 7/3 or less, good foamability was not obtained, and it was unsuitable. Furthermore, with respect to the formulation containing no thickener, the spread of the liquid after spray coating was too fast, and an unfavorable result was obtained.

Example 1 0.8% by weight of cyfenothrin, 1.5% by weight of diet, and 0.1% of POE nonylphenyl ether as active ingredients.
An insecticidal stock solution containing 5% by weight, 0.4% by weight of stearyl alcohol, 0.1% by weight of a water-soluble silicone resin, 65% by weight of undenatured ethanol, and 31.7% by weight of purified water was prepared. This insecticide stock solution (230 g) was filled in a 300 ml pressure-resistant aerosol container, the injection valve was charged, and then 25 g of injection gas (mixed gas of 70% by weight of dimethyl ether and 30% by weight of LPG) was injected to obtain a foamed aerosol insecticide of the present invention. . When this insecticide was foam-coated on kitchen floors, cupboards, and wall surfaces, it showed a sufficient control and repellent effect against cockroaches and other pests, and the efficacy was maintained for 6 months or more.

[0019]

According to the present invention, the foaming stability and the defoaming property are both excellent, the coating state is good, there is no splashing of the chemical solution as in the conventional spray type aerosol, and the solution is applied by leaching coating. An object of the present invention is to provide an extremely efficient and practical foamed aerosol insecticide which is less likely to cause liquid dripping and an application method using the same.

Claims (2)

(57) [Claims] 1. An insecticidal component of 0.05 to 25.0% by weight, a nonionic surfactant of 0.1 to 5.0% by weight, and a thickener of 0.1%.
01-3.0% by weight, lower alcohol 40-70% by weight
Containing 70% by weight or more of an insecticidal stock solution containing water as the remainder,
A foamed aerosol insecticide characterized in that an aerosol container is filled with an inner solution comprising 30% by weight or less of a propellant, and the inner solution is ejected in the form of foam. 2. An insecticidal component of 0.05 to 25.0% by weight, a nonionic surfactant of 0.1 to 5.0% by weight, a thickener of 0.1%.
01-3.0% by weight, lower alcohol 40-70% by weight
Containing 70% by weight or more of an insecticidal stock solution containing water as the remainder,
An application method, wherein an aerosol container is filled with an inner solution containing 30% by weight or less of a propellant, and the inner solution is ejected in the form of a foam and applied.