JPH02264703A - Foaming insect pest repellent aerosol - Google Patents

Abstract

PURPOSE:To obtain foaming aerosol insect repellent giving foam of good quality and exhibiting sufficient repellence by formulating diet of a repellent component and a nonionic surface active agent at a specific ratio and admixing water and an injection agent to the mixture. CONSTITUTION:Diet (N,N-diethyl-m-toluylamide, a insect repellent, and a nonionic surface active agent are mixed at a weight ratio of 10: (0.5 to 1.5) and the mixture is combined with water, then an injection agent to give the subject foaming insect pest repellent aerosol. As a nonionic surface active agent, is selected polyoxyethylene alkyl ether from a safe point of view, The injection agent is, e.g. liquefied petroleum gas or chlorinated fluorocarbon gas. The aerosol discloses excellent repellent effect with durative repellence.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a foaming pest repellent aerosol agent that protects the skin from mosquitoes, black flies, house dust mites, and the like.

<Conventional technology> Conventionally, as a repellent to protect the skin from mosquitoes, dust mites, dust mites, etc., the repellent component DEET (chemical name: N, N-diethyl-m-toluamide) is dissolved in ethanol, and a propellant is added to the solution. It is widely used because it is available as a pre-filled aerosol and can be easily sprayed with the push of a button.

<Problems to be Solved by the Present Invention> However, although spray-type aerosol preparations are simple and convenient, they also have the disadvantage that when sprayed onto the skin, the mist scatters and suffocates. These drawbacks made it difficult to use, especially for people with weak mucous membranes in the throat and nose, as well as small children.

In addition, lotions in which repellent ingredients are dissolved in ethanol do not choke, but have the disadvantage that they drip and are difficult to use.

[Problems to be Solved by the Invention] There is a foaming aerosol agent (foam type) that has a net shape that does not cause mist to scatter, cause choking, or cause liquid to drip during use. It can be manufactured by filling a mixture of water with a propellant.

However, even if these components are simply mixed together, the repellent component DEET is masked by the surfactant, resulting in a problem in that sufficient repellent efficacy cannot be obtained.

<Step P for Solving the Problem> As a result of careful consideration of the blending ratio of the repellent ingredient DEET and the surfactant, the present inventor has developed a foaming pest repellent aerosol that provides a good foam and has sufficient repellent effect. The inventors discovered the following and completed the present invention.

The present invention is a foaming insect pest repellent aerosol agent characterized in that the weight ratio of surfactant to DEET 10 is 0.5 to 1.5.

In addition, from the viewpoint of safety, the surfactant is preferably a nonionic surfactant.

As the nonionic surfactant, for example, polyoxyethylene alkyl ether, polyoxyethylene sorbitan fatty acid ester, sorbitan fatty acid ester, etc. can be used in appropriate combination.

In addition, higher alcohols such as cetanol are used as foam stabilizers,
Polyether-modified silicone and the like can be blended. Furthermore, preservatives such as methyl paraoxybenzoate and propyl paraoxybenzoate, ethanol as a low-temperature stabilizer, and fragrances may be appropriately blended.

As the propellant, liquefied petroleum gas, fluorocarbon gas, a mixed gas of liquefied petroleum gas and fluorocarbon gas, etc. can be used.

The mixing ratio of the chemical liquid and the propellant is preferably 20 to 10 lll of the propellant to 1001 parts of the chemical liquid in order to obtain good foaming properties.

<Effects of the Invention> Next, the experimental results are shown in the table below. In the experiment, a test sample was applied uniformly to the subject's arm from below the elbow to the wrist.
As a control, insect repellent spray was similarly applied to the other arm, and an adult Aedes albopictus mosquito that had been reared on sugar water for about 4 days after emergence was used.The arm was placed inside the cage and the flying mosquitoes were observed. The efficacy of the specimen was determined by relative comparison of the mosquito repellency of the treated area and the control area obtained by the above method.

Composition> M-I M-I M-3M-4 Date 10g 15g 20g
10gRB -50.6g O.6g
0.6g 0.24gT O-102,0g
2.0g 2.0g 0.5gSO-100
,4g O,4g 0.4g O,16g
Setanol 0.6g 0.6g O,6g
-Silicone 2.0g 2.0g
2.0g 1.5g Purified water Remainder Remainder
Remaining Total remaining 10100l100 1
0011 100! l1lDET/activator 10:3
10:2 10:1.5 10J, 9 repellent effect>
M-I M-2M-3M-4 2 hours after application ×
○〜△ ○ ○3 hours after application × △〜×
○ However, [1B-5 is polyoxyethylene behenyl ether (5EO), To-10 is polyoxyethylene sorbitan monooleate (20EO), 5o
-io is sorbitan monooleate, and silicone is dimethylsiloxane/methyl(polyoxyethylene)siloxane copolymer.

A pressure-resistant container was filled with the chemical solution 901, an injection device was attached, and then liquefied petroleum gas 1 (1+1) was injected under pressure, which was used as a test sample.

As a control, an experiment was conducted using a spray made by adding 5 g of DEET to 50 ml of ethanol and pressurizing 50 ml of Freon gas.

However, since the test sample and the control had different mesh shapes, 1 g of the test sample was sprayed and 3 g was sprayed to apply the control.

'' From the results of the two-legged experiment, it was found that a good repellent effect was obtained when the nonionic surfactant was less than 2 for Day-1-10 in terms of weight ratio.

<Example> Next, examples of the present invention will be shown.

Example 1 a-deet 9. OOg
b Polyoxyethylene behenyl ether (5E, 0.) 0, 2
3 gC polyoxyethylene sorbitan monooleate (20E, O,) 0,
45 gd Sorbitan monooleate O,1
4ge dimethylsiloxane/methyl(polyoxyethylene)siloxane copolymer 1, 35g "Fragrance
Trace amount g
Add purified water to make total 9 to 901.

h Liquefied petroleum gas 10.00ml total 100.00ml a-e are heated to about 80°C and dissolved and mixed, g purified water preheated to about 80°C is gradually added to this and mixed uniformly, 4 The mixture was mixed uniformly to obtain a chemical liquid, which was then filled into a pressure-resistant container and fitted with an injection device and press-fitted into the mixture to obtain a foaming insect repellent aerosol.

Example 2 DEET 14.0g polyoxine ethylene oleyl ether (2F!, O,) 0,
26 g polyoxyethylene sorbitan monostearate (20E, 0.) 0
, 9 g sorbitan monooleate 0.1
4g methylsiloxane/methyl(polyoxyethylene)siloxane copolymer 1.3g fragrance
Add a small amount of purified water to bring the total volume to 90ml.

Liquefied petroleum gas IO,01 total 100.0
A foaming insect repellent aerosol was prepared in the same manner as in Example 1.

Example 3 A-day-1・9
．． Ogh polyoxyethylene behenyl ether (5E, 0.) 0, 2
3 g C polyoxychedylene sorbitan monolaurate (20E, O,) 0,
46 gd Sorbitan monostearate O,1
3ge dimethylsiloxane/methyl(polyoxyethylene)siloxane copolymer 1,4gf fragrance
slight
C1kg ethanol 3.
2gh Baraoquin Methyl Benzoate 0.18g
1 Propyl paraoxybenzoate 0.1 gj Add purified water to make total m 9On+l.

k Liquefied petroleum gas 10.0m1
Total 10
Take 0.0ml a-C in a container, heat to about 80°C, dissolve and mix, gradually add purified water j previously heated to about 80'C, mix uniformly, and after 4 g! After adding , :h, + dissolved in B, add f and mix uniformly to make a chemical solution, fill this into a pressure-resistant container, install an injection device, and then k
was press-fitted into a foaming insect repellent aerosol.

<Effects of the Invention> When the above-mentioned Examples 1, 2 and 3 were applied to the hands and feet with appropriate rA, they showed a good repellent effect against mosquitoes, and
The repellent effect lasted for 7 hours.

Patent applicant Lion Katori Co., Ltd.

Claims (1)

[Claims] In a foaming pest repellent aerosol agent consisting of a chemical liquid consisting of the repellent ingredient DEET, a nonionic surfactant, and water, and a propellant, the weight ratio of the nonionic surfactant to 10 DEET is 0.5 to 1.5. An effervescent pest repellent aerosol agent.