JPH02142708A - Indoor dust and stabilization thereof - Google Patents

Abstract

PURPOSE:To obtain the title dust effective for expelling acarids, cockroaches, etc., having residual activity, harmless to human and animals by blending a pyrethroid-based compound or organic phosphorous compound as an active ingredient with a specific amount of surfactant of fatty acid alkylol amide base. CONSTITUTION:A pyrethroid-based compound and/or organic phosphorous compound as an active ingredient is blended with 0.2-5.0% based on total amount of at least one surfactant of fatty acid alkylol amide base or alkylamine polyoxyethylene ether base to give dust. Pyrethrin, allethrin, etc., are used as the pyrethroidbased compound and fenitrothion, diazinon, etc., as the organic phosphorous compound. The content of the active ingredient is 0.1-10wt.%. The dust is generally packed into plastic bottles and sprayed from nozzles upon gaps or under TATAMI (straw matting), etc.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention uses a pyrethroid compound and/or an organic phosphorus compound as an active ingredient, and contains a fatty acid alkylolamide type or an alkylamine polyoxyethylene polymer. IV % This invention relates to an indoor powder agent and a method for stabilizing the same, characterized in that at least one type of surfactant is blended in an amount of 0.2 to 5.0% based on the total amount.

[Conventional technology]

In recent years, as lifestyles and housing equipment have changed, the indoor environment has become suitable growing conditions for many types of pests, including mites, fleas, bed bugs, grasshoppers, wasps, and cockroaches, causing great damage.

For example, in newly built housing complexes that are not sufficiently dry, the tatami floors become hot and humid, creating an environment suitable for the growth of woolly mites, causing abnormal outbreaks that not only cause discomfort to people but also cause allergic diseases such as bronchial asthma. It is said that it will become

The dust mites, which are the dominant species of mites in indoor dust, live mainly in carpets, feeding on human skin, dander, food residue, etc., and when they occur in large numbers, they can cause bronchial asthma, nasal allergies, etc.

Conventionally, we have been able to prevent mites and pests that occur indoors.
The common method of extermination has been to spray powders containing pyrethroid compounds and organic phosphorus compounds under tatami mats and carpets, but these active ingredients are mixed with mineral powders such as clay and talc, and formulated into formulations. However, there was a concern that this would cause decomposition over time under long water conditions at high temperatures, leading to a decrease in efficacy, unexpected odor from decomposition products, and problems during storage. Methods of injecting chemical solutions into tatami mats and methods of laying insect repellent paper have also been proposed, but the former has problems with the permeability of the chemical into the tatami mats and stains on the tatami mats, while the latter has problems with drug application concentration and sustained release. However, it has not yet been possible to provide a satisfactory control effect.

[Problem that the invention seeks to solve]

The present inventors believe that the method of applying powder to tatami mats, carpets, etc. is still effective against mites and fleas.

Focusing on the fact that it is currently accepted as an efficient and simple extermination method for many types of indoor pests such as bedbugs, grasshoppers, wasps, and cockroaches, we have developed powders containing pyrethroid compounds and organophosphorus compounds that are effective over time. [Means and effects for solving the problems] The present inventors conducted research with the aim of improving formulations that do not cause a decrease in efficacy due to chemical decomposition, odor caused by decomposition products, or occurrence of cormorants during storage. As a result of intensive research to develop a stable powder for indoor use, we have developed a pyrethroid compound and a bamboo organophosphorus compound as active ingredients, and alkylolamide fatty acid or polyoxyalkylamine alkylamine. The present invention was completed based on the discovery that the intended purpose of the present invention can be achieved by blending at least one type of ethylene ether surfactant in an amount of 0.2 to 5.0% based on the total amount. I ended up doing it.

The pyrethroid compounds used as active ingredients in the present invention include pyrethrin, allethrin, resmethrin,
Examples include phthalthrin, flamethrin, phenothrin, permethrin, embenthrin, cyphenotrin, cypermethrin, etofenbrox, and when optical isomers or geometric isomers exist, each isomer alone and all possible isomer mixtures are included in the present invention. Of course, it is included in

Among them, phenothrin is preferably used because it has high insecticidal and acaricidal activity and residual efficacy, and has extremely low toxicity to humans and animals.

On the other hand, examples of the 11-phosphorus agent include fenitrothion, diazinon, pyridafenthione, trichlorfon, and dichlorvos.

The powder of the present invention contains the active ingredient in a weight ratio of 0.00 to the total amount.
It can contain 1-10% of piveronyl ptoxide, cinepirin 500.8-421. A synergist such as TA can be added as appropriate.

The present invention uses at least one of the following fatty acid alkylolamide surfactants or alkylamine polyoxyethylene ether surfactants as an active ingredient in the powder, in an amount of 0.2 to 10% based on the total amount. It is characterized by containing 5.0%.

1. Alkylo-μ amide of fatty acid [Example] Lauric acid jetanolamide (hereinafter referred to as surfactant A) 2. Polyoxyethylene ether of alkylamine 12
- Nt-1-(CH2CH20)/1-H [Example] Polyoxyethylene ether of stearylamine/L/(
(hereinafter referred to as surfactant B) Polyoxyethylene ether of oleylamine/I/ (hereinafter referred to as surfactant C) Hiko, in the above formula, R represents an alkyl group, and n represents an integer of 1 or more. In normal production, it is often obtained as a mixture of compounds having different degrees of polymerization, but the present invention encompasses both single products and mixtures.

The reason why these surfactants have a specific stabilizing effect is still unclear, but it is thought that they contribute comprehensively to suppressing the surface activity of mineral powders and adjusting the pH.

In addition, other types of surfactants may be added to these surfactants, such as epoxidized vegetable oil, fatty acid ester of sorbitan,
Polyoxyethylene ether of sorbitan ester, dodecylbenzene sulfonate, etc. may be added as appropriate. Mineral powders used as carriers in the powder of the present invention include clay, talc, kaolin, bentonite,
Zeolite, diatomaceous earth.

Examples include Sickleite and Carplex.

If necessary, various lubricants, fluidity improvers such as PAP (Nihon Kagaku, trade name), and small amounts of auxiliary solvents can be used for the purpose of uniform mixing. Inhibitors such as BHT, DBH, Sumilizer BP-
The stability of the active ingredient can be further enhanced by adding Hikodo 101 (trade name, manufactured by Sumitomo Chemical).

In addition, the active ingredients of the powder of the present invention include pest repellents such as DEET, dibuti μ succinate, and dipropylisocincolomate, and NAC.

A highly effective multi-purpose composition can also be obtained by mixing other insecticides and acaricides such as MTMC and BPMC, fungicides, and fragrances.

The powder of the present invention was usually filled into a plastic bottle, and then analyzed from the loading nozzle or spraying needle into gaps in tatami mats, under tatami mats, on carpets, etc., and the recovery rate relative to the initial content was determined as follows.

In addition, tests were also conducted on the physical properties of the powder preparation (such as sapling properties).

Prepare clay powder, put this powder into a glass bottle and add 1
After storing at 30°C for 9 hours, the amount of active ingredient in the powder was measured by gas chromatography. Note 1) Sorbo-y7157; Epoxidized linseed oil (Toho Chemical, trade name) Note 2) Hi-Se A/5
ASi phenylxylylethane (Nippon Oil Co., Ltd., trade name) Note 3) Span 80; Sorbitan's oleic acid esternoyl atlas, trade name) -〇- Note 4) Twin 80; Atlas, m product name) Note 5) Silicone 5H8421;
As a result of the test (trade name), it was possible to obtain a powder with excellent stability by preparing a clay powder by adding lauric acid jetanolamide or stearylamine polyoxyethylene ether to Smithlin. In contrast, a powder containing no stabilizer (control powder 1),
Powders containing other types of surfactants (vs. 1ff11
5h'i14.5.6) and the silicone oil additive (control powder 7), the active ingredient rapidly decomposed, indicating that the surfactant in the powder of the present invention was specifically effective.

In the case of control powder 2, the amount of surfactant added was too low.
On the other hand, regarding Control Powder 3, since the amount added was too large, there were problems with the physical properties of the formulation in terms of fluidity and powder properties. Alkylolamides of fatty acids,
Stabilization of the active ingredient was achieved by blending an alkylamine polyoxyethylene ether system and a surfactant.

Example 1 0.5 part of Smithlin, 0.05 part of Sumilizer BP-101 (Sumitomo Chemical, trade name), and 8015 parts of surfactant were added to 1 part.
Dissolved in 82961.0 parts of Stone High Sea/L/S A,
The powder obtained by adsorbing this onto 2.0 parts of Carplex and 95.95 parts of clay were thoroughly mixed, and the mixture was mixed and pulverized using a hammer mill to obtain a 0.5% powder.

This powder filled in a plastic container had excellent long-term storage stability, and no decomposition of Smithrin was observed even after 3 years of storage.

Furthermore, when 10 to 20 g of the solution was applied per stingray under the tatami mat, it showed excellent extermination effects on mites, fleas, bed bugs, etc., and no problems such as staining of the tatami mat were observed.

It became clear that

Test Example 2 According to Test Example 1, the powders shown in the following table were prepared by changing the types of active ingredients and mineral powders. The stability 1/1 after storage for 9 hours was investigated and the results were as follows.

Test results, active ingredients used, mineral powder Example 2 Ethofenbrox 0.5 part, DEET 1.0 part, B
ITo, 2 parts, surfactant A 0.5 part, Tsurupol 71
57, 2.0 parts of Carplex, and 95.3 parts of kaolin were thoroughly mixed and then mixed and ground in a hammer mill to obtain a 0.5% powder.

This powder has excellent long-term storage stability and physical properties, and when sprinkled on a carpet,
It was extremely effective in exterminating and preventing Dermatophagoides mites.

〔Effect of the invention〕

The present invention provides a powder for indoor use that has superior stability of active ingredients as compared to conventional formulations, and has both high pesticidal effect and safety for humans and livestock, and a method for stabilizing the same.

Claims (2)

[Claims] (1) Contains a pyrethroid compound and/or an organic phosphorus compound as an active ingredient, and at least one surfactant based on an alkylolamide based fatty acid or a polyoxyethylene ether based alkylamine based on the total amount. ．．
An indoor powder agent characterized by containing 2 to 5.0%. (2) In indoor powders containing pyrethroid compounds and/or organic phosphorus compounds as active ingredients, at least one type of surfactant based on alkylolamide based on fatty acids or polyoxyethylene ether based on alkylamine is added to the total amount. A method for stabilizing a powder for indoor use, characterized by blending 0.2 to 5.0% of the powder.