JPS63126803A - Insecticide - Google Patents

Abstract

PURPOSE:To obtain a safe insecticide to be expected as an insecticide especially for clothes, having excellent insecticidal effects with a small amount, capable of prolonging the effects for a long period, containing benzoic acid as an active ingredient. CONSTITUTION:An insecticide containing benzoic acid which is a solid having 122.4 deg.C melting point, is obtained as a free or combined type, has high safety, slight sublimation and improved insecticidal properties by a vaporized gas thereof, as an active ingredient. The benzoic acid is obtained by oxidizing toluene. The compound is impregnated into a proper holding carrier such as filter paper, etc., or dispersed into a sublimating insecticide such as camphor, etc., to increase the surface area of the benzoic acid and preferably used. Benzoic acid thus obtained is packed into an air-permeable bag such as Japanese paper or stored in a moistureproof cellophane having bored small holes as existing subliming insecticides and used.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a novel insect repellent.

[Conventional technology]

There are many insect repellents and insecticides that have been used in the past, but unlike general agricultural and horticultural insecticides, there are not many insect repellents for clothing that are used in clothing storage furniture and containers in the home.

This is because it has low toxicity to humans and livestock, does not contaminate or damage clothing, etc., and is effective against specific insects such as burrs.

Therefore, insect repellents that have been used for a long time, such as naphthalene, camphor, and para-dichlorobenzene, are still used in considerable quantities because of their good properties.

[Problem that the invention seeks to solve]

However, these insect repellents have low efficacy and are dispersed in a relatively short period of time, so they cannot maintain their effectiveness over a long period of time, require frequent replenishment, and therefore require a large amount of use.

It has been desired to develop a new insect repellent that is safe and effective for a long period of time with a relatively small amount.

[Means for solving problems]

The present inventor conducted various studies on compounds related to or peripheral to compounds used as insect repellents, and found that benzoic acid has a sublimation property, albeit slightly.

The present invention was achieved by discovering that the volatilized gas has excellent insecticidal properties.

Benzoic acid is a solid with a melting point of 122.4° C. and is an extremely safe compound that is naturally obtained in free and bound forms. It is also produced by oxidizing toluene.

A small amount of benzoic acid dissolved in a low-boiling organic solvent and impregnated with filter paper was placed in an IQ beaker, a few burr larvae were placed in it, the lid was covered, and the mixture was left for several days. Most of them died.

Since benzoic acid is a solid with low sublimability, it is desirable to use it by impregnating it into a suitable holding carrier such as filter paper, or by dispersing it in another sublimable insect repellent, such as camphor, to increase its surface area. The benzoic acid obtained is stored in the same way as conventional sublimation insect repellents, either by filling it in a breathable bag such as Japanese paper, or by making small holes in moisture-proof cellophane or the like.

〔Example〕

Dissolve 1 g of the drug in 5 mm of acetone and impregnate a 6 x 41 square filter paper. After the acetone has completely evaporated, place it in the bottom of a glass useful container with an internal volume of approximately IQ.

Furthermore, 10 burr larvae were placed in a 0.08Q stainless steel container together with the wool, and placed in a 1α glass container at 20°C.
It was left in a constant temperature and humidity chamber (75% R, H) for one week.

The test results were taken as the average of the amount of feeding damage and the number of deaths for the five tested specimens.

The test results are shown in Table 1.

Table 1 [Effects of the Invention] The benzoic acid of the present invention is a strong insect repellent and has excellent insect repellent properties even in small amounts, and the effect remains for a long period of time.

Since it has properties as an insect repellent for lichens, it is expected to be an excellent insect repellent to replace conventional insect repellents.

Patent applicant: Esthe Chemical Co., Ltd. Procedural amendment (formality) %formula% 1.Display of the incident 1985 Patent Order No. 271390 3. Person who makes corrections January 27, 1986 (shipment date) 5. Subject of correction Application and specification (type engraving) 6. Contents of amendment

Claims (1)

[Claims] An insect repellent containing benzoic acid as an active ingredient.