JPH10182304A - Insect repellent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and clearly confirm the remaining amount and the end point of an active ingredient, to have high insect repellent effect, and to have sufficient drug stability despite being an aqueous composition and high safety. Provide an insect repellent for clothing. SOLUTION: The insect repellent has a vapor pressure of 10 ^-4 to 10 ^-1 mm.
Contains Hg (20 ° C.) room temperature transpirable pyrethroid insecticide, water-absorbing polymer, water, and stabilizer. Preferably, the cold-vaporizable pyrethroid insecticide is empentrin and / or
Or terarethrine, wherein the stabilizer comprises a surfactant and / or an organic solvent, and the water-absorbing polymer has a weight of 10 to 10%.
It is composed of a highly water-absorbing synthetic polymer having a water absorption capacity of 1,000 times.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-based insect repellent which contains a normal-temperature transpirable pyrethroid insecticide as an active ingredient and has an indicator function for easily and clearly confirming the residual amount and end point of the drug. .

[0002]

2. Description of the Related Art Various types of insect repellents for clothing have been proposed as being capable of recognizing the residual state and end point of a drug. For example, the repellent state of a drug can be recognized by its color change. Using a color-developing type, a sublimation type that allows the remaining amount of the drug to be recognized by the remaining amount of the sublimation agent, a liquid type that allows the remaining amount of the liquid drug to be seen through the transparent film, and a gelling agent, There is a gel type that becomes smaller. As the insect repellent using a pyrethroid-based insecticide as an active ingredient, the above-mentioned coloring type, liquid type, and gel type have been proposed.
JP-A-324003 discloses an insect repellent having an indicator function consisting of a volatile desensitizing agent, an electron-donating color-developing dye, and an inorganic color-developing compound. As the volatile desensitizing agent, insecticide and insect repellent are disclosed. By using a normal-temperature volatile pyrethroid insecticide having an effect, the pyrethroid insecticide of the active ingredient is volatilized, and as it decreases in color,
It states that the volatilization process and the end point can be recognized.

As a liquid type, for example, Japanese Patent Application Laid-Open No. 1-175911 discloses that a flat bag container made of a transparent resin film permeable by liquid is filled with empentrin, which is a kind of pyrethroid insecticide. There is disclosed an insect repellent which is constituted by holding this in an outer case having further air permeability. Further, a gel type is disclosed in JP-A-63-222104,
According to this publication, a pesticidal agent which is volatile at normal temperature such as empentrin is gelated by using a specific gelling agent and a hydrocarbon-based solvent, so that a long-term pesticidal effect can be exhibited. It is said that the end point can be determined because little residue remains after volatilization.

[0004]

However, in the case of the above-mentioned color-forming type, whether or not to develop a color is determined by the intensity of the desensitizing action of the volatile desensitizing agent and the developing action of the developing compound. Is unclear, and it is difficult to determine the remaining amount of the active ingredient. On the other hand, in the case of the liquid type, the remaining amount of the drug can be recognized through the transparent film, but there is a possibility that the liquid leaks. Furthermore, since the gel-like thing uses a hydrocarbon-based solvent such as kerosene together with the N-acylamino acid derivative-based gelling agent, there is a problem that it is flammable and has a peculiar odor. Further, since it is an oil gel composition, a heating step is generally required at the time of production, and there is a disadvantage that the loss of the active ingredient in the production step is large.

[0005] Further, since it has been conventionally recognized that a normal-temperature transpirable pyrethroid insecticide is rapidly decomposable in water, an aqueous composition similar to the composition of the present invention has not been known at all. Accordingly, an object of the present invention is to provide a highly safe insect repellent which has a high insect repellent effect, and has sufficient drug stability despite being an aqueous composition. An object of the present invention is to provide an insect repellent for clothing.

[0006]

According to the present invention, a vapor pressure of 10 ^-4 to 10 ^-1 mmHg is attained.
(20 ° C.) An insect repellent comprising a normal temperature transpirable pyrethroid insecticide, a water-absorbing polymer, water and a stabilizer in the range of (20 ° C.) is provided. Preferably, (R, S) -1-ethynyl-2-methylpent-2-enyl (1R) -cis or (R, S) -1-ethynyl-2-methylpent-2-enyl (1R) is used as the cold-vaporizable pyrethroid insecticide.
Transchrysanthemate (hereinafter referred to as empentrin) and / or 3-allyl-2-methylcyclopent-
2-en-4-one-1-yl-2,2,3,3-tetramethylcyclopropanecarboxylate (hereinafter referred to as teraresulin) is used, and the stabilizer comprises a surfactant and / or an organic solvent. . In a further preferred embodiment, the organic solvent has a vapor pressure of 10 ^-2 to 10.
One selected from the group consisting of alcohols, glycols, ethers, esters and ketones having a solubility in water of ² mmHg (20 ° C.) and 10% by weight (20 ° C.) or more, or Two or more organic solvents are used, and the surfactant has an HLB value of 9 to 18.
Nonionic surfactants or mixed surfactants containing the nonionic surfactants are used, and the water-absorbing polymer has a weight of 10 to 1,0 at room temperature (20 ° C.).
A water-absorbing polymer having a water absorption capacity of 00 times is used.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The insect repellent of the present invention contains a stabilizer (a surfactant and / or a water-miscible organic solvent, for example, a polar solvent) in a semi-solid product in which water is absorbed by a water-absorbing polymer. In which a normal-temperature transpirable pyrethroid-based insecticide is stably contained in the presence of. That is, the pyrethroid-based insecticide is not directly dissolved and dispersed in water, but is dissolved and dispersed via a stabilizer in a semi-solid substance in which water is absorbed by a water-absorbing polymer. Decomposition of the pyrethroid insecticide is suppressed, and the pyrethroid insecticide is stably possessed in spite of being an aqueous composition, and the transpiration characteristic of a normal temperature transpirable pyrethroid insecticide is lost. In addition, the insect repellent effect is high, and the remaining amount and end point of the active ingredient can be easily and clearly confirmed. That is, when the insect repellent of the present invention is filled into a microporous or air-permeable container, bag or the like for use, the room-temperature transpirable pyrethroid-based insecticide is dissolved in the air over time together with water and other volatile components. By transpiration, the insect pests can be killed and repelled, and the food damage caused by the insects can be prevented, and a constant insect repellent effect can be exhibited over a long period of time. And, as the weight and volume of the composition itself decrease along with it, it exerts an indicator function, and the residual amount can be grasped at a glance in the use process, and finally, only a small amount of the non-volatile component becomes a residue. It is clear to everyone that the expiration date of the insect repellent has expired.

Various oil gel compositions have been proposed in the past simply based on the idea that the residual amount of the drug and the end point can be easily and clearly confirmed. However, the oil gel composition of the present invention is oil-based and not water-based. In addition to being fundamentally different from compositions, they differ greatly in the following respects. First, the composition of the present invention has a very low possibility of ignition. In the case of an oil gel composition, a high-temperature heating step is generally required at the time of production, and equipment design and investment must be made with due consideration given to fire, explosion, and the like due to oil ignition in the production step. Furthermore, in the course of distribution, the Fire Services Act is also subject to the regulations of the handling of dangerous goods. In addition, the difference is that the composition of the present invention is almost odorless and contains water as a main component, so that it is suitable for clothing. Organic solvents, which account for about 90% or more of the oil gel composition, generally have a strong unpleasant odor and a strong aggressiveness against resins and the like, and are used for fibers, especially synthetic fibers and buttons, various decorative articles, hangers, closets, painted surfaces, and the like. In view of the effects of the above, it was never satisfactory as an insect repellent for clothing. Further, in the case of the composition of the present invention, there is obtained another advantage that the evaporated water also has a humidity control effect and also has a humidifying effect upon drying.

[0009] The normal temperature transpirable pyrethroid insecticide has a vapor pressure of 10 ^-4 to 10 ^-1 mmHg so as to evaporate at normal temperature and exhibit an excellent insect repellent effect over a long period of time.
Any pyrethroid insecticide within the range of (20 ° C.) can be used, and preferably, empentrin and terarethrin, which are highly safe room temperature transpirable pyrethroid insecticides, can be used. The amount of the normal-temperature transpirable pyrethroid-based insecticide depends on the kind used, but is generally about 0.05 to 5% by weight of the total amount of the composition, and more preferably 0.1 to 1% by weight. % By weight. When the amount of the insecticide is less than 0.05% by weight, a sufficient insecticidal effect cannot be obtained. On the other hand, when the amount is more than 5% by weight, a large amount of a surfactant and / or an organic solvent as a stabilizer is required. The end point tends to be unclear due to a large amount of residue at the end, and the residue of the insecticide increases, which is uneconomical. It is also possible to use a mixture of two or more pyrethroid insecticides.

The water absorbing polymer is not particularly limited as long as it can absorb water, and various substances can be used. For example, naturally occurring polymers such as juran gum, xanthan gum, locust bean gum, carrageenan, pullulan, and gelatin, or synthetic polymers such as polyvinyl alcohol, carboxymethyl cellulose, sodium polyacrylate, and polyacrylamide can be used. However, many of the above substances require heating, stirring, etc. in use. Therefore, the manufacturing process is rather complicated, and there is a loss such as evaporation and decomposition of the active ingredient during the process. There is a drawback that the second half is slightly depressed. For this reason, it is necessary to take measures such as premixing the active ingredient in a large amount.

From the viewpoint that there is no such disadvantage, it is advantageous to use a water-absorbing polymer having a water absorption of about 10 to 1,000 times its own weight at room temperature, and it is advantageous that the components are degraded and evaporated in the production process. It is possible to prevent loss due to transpiration of the toxic substance. As such a water-absorbing polymer, a copolymer of an α-olefin such as ethylene, propylene, butene-1, isobutylene, diisobutylene and maleic anhydride or a derivative thereof or a crosslinked product of an alkali neutralized product thereof ( For example, KI gel manufactured by Kuraray Co., Ltd.); a copolymer of a polymerizable vinyl compound such as methyl vinyl ether, vinyl acetate, and styrene with maleic anhydride or a derivative thereof or a crosslinked product of an alkali neutralized product thereof; acrylic acid or methacrylic acid Or copolymers containing them as main components or cross-linked products of alkali-neutralized products thereof (for example, Hibiswako manufactured by Wako Pure Chemical Industries, Ltd., Carbopol manufactured by Chugai Trading Co., Ltd., etc.) ); A crosslinked acrylate polymer obtained from acrylate or methacrylate (for example, Arakawa Chemical Industry Co., Ltd. Saponified product of a copolymer of vinyl acetate and (meth) acrylic acid ester; alkali-neutralized product of starch-poly (meth) acrylonitrile graft copolymer; starch or cellulose and a water-soluble monomer (maleic anhydride) Highly water-absorbing synthetic polymers represented by a crosslinked product of a graft polymer with an acid, acrylic acid, and the like (for example, Sunfresh ST-500S manufactured by Sanyo Chemical Industries, Ltd.) and the like.

The compounding amount of the water-absorbing polymer is preferably 0.1 to 10% by weight of the total amount of the composition. When the amount of the water-absorbing polymer is less than 0.1% by weight, water absorption is not sufficiently performed, and problems such as syneresis and leakage may occur. Remains as a residue, so that the end point of the insect repellent tends to be unclear.

As the stabilizer, a surfactant and an organic solvent can be suitably used as described above. As the type of the surfactant, a cationic surfactant, an anionic surfactant, an amphoteric surfactant, and a nonionic surfactant can be used in any combination.
-20, especially a nonionic surfactant having an HLB value of 9 to 18 or a mixed surfactant containing the nonionic surfactant,
It is preferable in terms of formulation stability, economy, and the like. Examples of the nonionic surfactant include polyoxyethylene alkyl ether, polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene castor oil, and polyoxyethylene hydrogenated castor oil derivative. I can do it.
Also, silicone-based and fluorine-based surfactants can be suitably used. The amount of the surfactant is preferably 20% by weight or less of the total amount of the composition, more preferably 5% by weight.
It is as follows. If the content is more than 20% by weight, the residue at the end of use increases, and problems such as color change (discoloration), foaming during production and distribution, or the water absorbing ability of the water-absorbing polymer can be sufficiently exhibited. There is a possibility that stability may be impaired as an insect repellent such as disappearance.

[0014] On the other hand, examples of the organic solvent, it is desirable that no by evaporation with transpiration of pyrethroid insecticides, vapor pressure particularly preferably those in the range of 10 ^-2 ~10 ² mmHg. If the vapor pressure is less than 10 ^-2 mmHg, only the organic solvent may remain for an unnecessarily long period of time, whereby the balance of the composition may be greatly lost during use, and the indicator function may be impaired. There is a risk that it will. On the other hand, the vapor pressure is 10 ² mm
If an organic solvent larger than Hg is used, on the contrary, the organic solvent may evaporate earlier than the other components, and the balance of the composition may be significantly lost during use, and the indicator function may not be able to be exhibited. There is. In addition, when an insect repellent is prepared using such a highly transpirable organic solvent, not only is the odor too strong to be unsuitable as an insect repellent for clothing, but there is a possibility of ignition due to excessive handling. .

Further, since the organic solvent must be mixed with water, alcohols, glycols, ethers, esters, ketones, and the like having a solubility in water of 10% by weight (20 ° C.) or more are desirable. Examples include, but are not limited to, diethylene glycol monobutyl ether, diethylene glycol monoethyl ether, diethylene glycol monomethyl ether, ethylene glycol, propylene glycol, ethanol, isopropanol, methyl ethyl ketone, and other solvents miscible with water in a free ratio. Not something.

The amount of the organic solvent is preferably not more than 30% by weight of the total amount of the composition. If the amount of the organic solvent exceeds 30% by weight, water absorption by the water-absorbing polymer becomes difficult, and the odor becomes strong. Also,
In the event of accidental ingestion or ingestion, there is also a problem in safety. These organic solvents also have the effect of lowering the melting point of the composition, and also have the effect of preventing freezing damage to commodities in winter and improving the stability of the composition. The surfactant and the organic solvent may be used in combination at any ratio or may be used alone depending on the intended use period and the like.

As for water, general tap water is sufficient, but high-purity water such as ion-exchanged water, distilled water and pure water is more desirable from the viewpoint of composition stability. In the case of insect repellents for clothing, the amount of water used varies greatly depending on the intended shelf life, container form, etc., but in the present invention, 3 to 24 months, preferably 6 to 12 months is assumed. About 3 to 500 g per preparation is preferable. Furthermore, in a large space such as a clothes dance or a closet, the weight is 20 to 300 g, more preferably 50 to 200 g. 5-100g, more preferably 10-10g in small space such as drawer, costume case, storage room
50 g. The blending ratio is arbitrary at 30% by weight or more of the total amount of the composition, but from the viewpoint of safety, 50% by weight or more is more preferable.

The insect repellent of the present invention may further contain, in addition to the above essential components, an antioxidant to further improve the stability of the active ingredient. The compounding ratio of the antioxidant is one-tenth to one-tenth that of the normal-temperature transpirable pyrethroid insecticide.
A 0-fold amount, that is, 0.01 to 10% by weight, more preferably 0.1 to 1% by weight based on the whole composition is economical. If the amount is less than 0.01% by weight, a sufficient antioxidant effect cannot be obtained. On the other hand, if the amount is more than 10% by weight, a surfactant or an organic solvent is further required to solubilize the same, and discoloration may be caused. Becomes Examples of the antioxidant include dibutylhydroxytoluene (abbreviated as BHT), butylhydroxyanisole (abbreviated as BHA), 4,4-thiobis-
(6-t-butyl-3-methylphenol) (trade name: Yoshinox SR, manufactured by Yoshitomi Pharmaceutical Co., Ltd.), 4,4-butylidenebis- (6-t-butyl-3-methylphenol)
(Trade name: Yoshinox BB, manufactured by Yoshitomi Pharmaceutical Co., Ltd.), 2,
2-methylenebis- (4-methyl-6-t-butylphenol) (trade name: Yoshinox 2246G, manufactured by Yoshitomi Pharmaceutical Co., Ltd.), 2,2-methylenebis- (4-ethyl-6)
-T-butylphenol) (trade name: Yoshinox 42)
5, Yoshitomi Pharmaceutical Co., Ltd.), n-octadecyl-3- (4
-Hydroxy-3,5-di-t-butylphenyl) propionate (trade name Irganox 1076, manufactured by Nippon Ciba Geigy Co., Ltd.), 1,6-hexanediol-bis [3- (3,5-di-t- Butyl-4-hydroxyphenyl) propionate] (trade name Irganox 25)
9, Nippon Ciba Geigy Co., Ltd.), pentaerythrityl-tetrakis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate] (trade name: Irganox 1010, Nippon Ciba Geigy Co., Ltd.) , Dilauryl thiopropionate (abbreviated DLTP), distearyl thiodipropionate (abbreviated as DSTP), octylated diphenylamine (trade name Irganox 5057, manufactured by Nippon Ciba Geigy Co., Ltd.), tocopherol, n-propyl gallate, etc. But are not limited to these.

Further, the insect repellent of the present invention may optionally contain an antiseptic / antifungal agent in order to prevent contamination due to microbial growth in the product. For example, paraoxybenzoic acid and its derivatives, benzoic acid, sodium benzoate and the like can be mentioned. In addition, some organic solvents used as a stabilizer in the insect repellent of the present invention, for example, ethyl alcohol,
It is generally widely known that isopropyl alcohol and the like, and some surfactants such as quaternary ammonium salts have an antiseptic and antifungal effect. Needless to say, it is not necessary to add a fungicide.

Further, the insect repellent of the present invention contains an ultraviolet absorber to prevent the decomposition of the transpirable pyrethroid-based insecticide by ultraviolet rays and to reduce the molecular weight of the water-absorbing polymer, ie, the viscosity. You can also. Examples of the ultraviolet absorber include 2- (5-methyl-2-hydroxyphenyl) benzotriazole (trade name: Tinuvin P, manufactured by Nippon Ciba Geigy Co., Ltd.), 2- (3,5-di-t-butyl-2-hydroxy) Phenyl) benzotriazole (trade name: Tinuvin 320, Nippon Ciba Geigy Co., Ltd.)
), 2- (3-t-butyl-5-methyl-2-hydroxyphenyl) -5-chlorobenzotriazole (trade name: Tinuvin 326, manufactured by Nippon Ciba Geigy Co., Ltd.), 2-
(3,5-di-t-butyl-2-hydroxyphenyl)
-5-chlorobenzotriazole (trade name Tinuvin 32
7, Nippon Ciba Geigy Co., Ltd.), 2-hydroxy-4
-N-octoxybenzophenone (Tomisorb 8 trade name)
00, manufactured by Yoshitomi Pharmaceutical Co., Ltd.) and 2-hydroxy-4-methoxybenzophenone (trade name: Biosorb 110, manufactured by Kyodo Yakuhin Co., Ltd.).

In addition, the insect repellents of the present invention include natural pest repellents such as various plant essential oils, such as almond oil, cedarwood oil, ginger oil, cinnamon oil, celery oil, spearmint oil, hinoki oil, hiba oil and perilla oil. , Lime oil, citronella oil, peppermint oil, eucalyptus oil, peppermint oil, lemon oil, lemongrass oil, wasabi oil, etc., as well as fragrances, synergists, pigments, luminous substances, deodorants, deodorants, transpiration sterilization Agents (isopropylmethylphenol, parachlorometaxylenol, orthophenylphenol, etc.),
Evaporative rust inhibitor, Evaporative synthetic pest repellent such as N, N-diethyl-m-toluamide (abbreviated as DEET), Evaporative insect growth regulator, Thickener such as mineral silica such as montmorillonite (Nippon Silica) Rabonite manufactured by Kogyo Co., Ltd., synthetic smectite manufactured by Corp Chemical Co., Ltd.), a viscosity lowering inhibitor, a pH adjuster, and the like can be arbitrarily added. I do not care.

The insect repellent of the present invention may be used in a form such as a container having fine air holes or air permeability, a nonwoven fabric having air permeability, or a bag such as a resin sheet. By using it, the active ingredient of the insect repellent can be evaporated, and at the same time, the insect repellent itself can be prevented from directly touching and contaminating clothing. The material of the container is not particularly limited as long as it can hold a fluid such as glass, resin, and pottery. However, the transparency and the barrier property of the fluid are high, and the lightweight and economical vinyl chloride resin and polymethyl resin are used. Pentene, polyethylene terephthalate, polyethylene, polypropylene, polyacrylonitrile, polycarbonate and the like are preferred. Adjust the evaporation rate at the opening of the container.
Various sheets, films, lids, and the like for preventing accidents such as accidental eating can be combined. Further, such a container, a bag and its outer film are manufactured by kneading an ultraviolet absorber or a pigment as exemplified above in order to block ultraviolet rays which cause quality deterioration in store display or the like. You can also.

Further, depending on the convenience of the user, the place of use, etc., there may be a case where a stronger insecticidal effect or a faster onset of the effect is desired. In such a case,
It is also effective to combine a liquid absorbing core, an impregnated volatilizer, a volatilization auxiliary member, an effective volatilization area variable device, a heating device, a blower, an ultrasonic vibrator, and the like. Further, various hanging tools, fixing tools, adhesives, and the like for facilitating installation can be combined. The insect repellent of the present invention is preferably used in a closet or the like in which clothes are stored and exerts a suitable insecticidal effect on clothing pests, but food storage, under the floor, under the sink, cupboards,
By installing it on a bookshelf, etc., non-clothing pests such as caterpillars, unpleasant pests such as shibanmushi, kokunustomodoki,
The present invention can also be applied to storage pests such as weevil, hygiene pests such as cockroaches, and book pests such as spots.

[0024]

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but it is needless to say that the present invention is not limited to the following examples.

Formulation Examples 1 to 11 In the combinations shown in Table 1 below, transpirable insecticides, stabilizers (surfactants, organic solvents), and other components (antioxidants, preservatives) are weighed in this order, and these are weighed. After mixing thoroughly,
Water was added to make the mixture uniform, and a water-absorbing polymer was mixed to obtain a clear semi-solid. However, with respect to Formulation Examples 10 and 11, each component was stirred and mixed while being heated, and then allowed to cool.

[Table 1]

Comparative Formulation Examples 1 to 4 For comparison, the formulation examples 1 to 1 were used in combinations shown in Table 2 below.
In the same manner as in Example 1, Comparative Preparations 1 to 4 were obtained. However, in Comparative Formulation Examples 3 and 4, similarly to Formulation Examples 10 and 11, each component was stirred and mixed while heating, and then allowed to cool.

[Table 2]

Test method: Formulation example 1 prepared as described above
The efficacy, stability, and indicator function were examined for Nos. ~ 11 and Comparative Formulation Examples 1-4. In addition, each evaluation method was performed as follows. Efficacy: about 500 liters (90 cm wide x 110 cm high)
× 50 cm in depth) was provided with an insect repellent and 2 kg of clothing. Immediately after the installation and every month thereafter, typical clothing pests such as iga and maggot were placed in a petri dish and placed in the space. The petri dish was collected 3 days later, and the state of the clothing pest was observed. ：: All the insect pests were knocked down for 3 to 9 months. Δ: Knockdown was observed only immediately after installation, but no change was observed in clothing pests thereafter. ×: No change was observed in the clothing pests.

Stability: The insecticide was stored tightly closed at 40 ° C. in a dark place, and the residual rate of the insecticide after 6 months was analyzed. ：: 90% or more remaining △: 60 to 90% remaining ×: Residual rate less than 60%

Indicator function: Evaluation was made as to whether or not the whole insect repellent was reduced in weight according to the volatilization of the insecticide over 3 to 9 months. ：: The weight loss ratio of the insecticide and the whole insect repellent was almost the same. X: The weight loss ratio of the insecticide and the whole insect repellent does not match at all.

Overall evaluation: In addition to the above three items, safety and odor were further taken into consideration to determine whether or not the composition was suitable as an insect repellent for clothing. ：: Suitable for insect repellent for clothing. ×: Not suitable as an insect repellent for clothing.

Table 3 below shows the test results based on the above evaluation methods.

[Table 3] As is clear from the results shown in Table 3 above, Formulation Examples 1 to 11 prepared according to the present invention showed good results for all the evaluation items described above, whereas Comparative Formulation Examples 1 to 4
There were problems with any of the efficacy, stability, and indicator function, and no satisfactory insect repellent for clothing was obtained.

Comparative Test Example 1 Insect repellents were obtained in the same manner as in Formulation Examples 1 to 11 by using the combinations shown in Table 4 below in order to examine the influence of changes in the amount of the organic solvent. In addition, Example No. 1 is the same as in Formulation Example 6.

[Table 4]

Each of the obtained insect repellents was examined for efficacy, stability and indicator function in the same manner as in the above test method. Table 5 shows the results.

[Table 5] From the results shown in Table 5, it can be seen that a large amount of the organic solvent (Example Nos. 2 to 4) causes a problem in the indicator function.

[0034]

As described above, the insect repellent of the present invention stably contains a normal temperature transpirable pyrethroid-based insecticide as an active ingredient despite being an aqueous composition, The above-mentioned active ingredient is evaporatively released to exhibit excellent insecticidal effect, and the weight and volume of the whole insect repellent decrease with the decrease of the active ingredient, so that the remaining amount and end point of the active ingredient can be easily and clearly recognized. can do. Further, since it is a water-based composition, it is almost odorless, has almost no corrosiveness to resins and fibers, and has excellent safety because there is no danger of inflammation during production and use. Further, since the insect repellent is semi-solid, there is no fear of contamination of clothing due to leakage of the liquid medicine which may occur in the conventional liquid type insect repellent, and the handleability is excellent.

Claims (6)

[Claims] A vapor pressure of 10 ^-4 to 10 ^-1 mmHg (20
C) in the range of room temperature transpirable pyrethroid insecticides,
An insect repellent comprising a water-absorbing polymer, water and a stabilizer. 2. The cold-vaporizable pyrethroid insecticide according to claim 1, wherein the (R, S) -1-ethynyl-2-methylpent-2-enyl (1R) -cis, transchrysanthemate and / or
Or 3-allyl-2-methylcyclopent-2-ene-
The insect repellent according to claim 1, which is 4-one-1-yl-2,2,3,3-tetramethylcyclopropanecarboxylate. 3. The insect repellent according to claim 1, wherein the stabilizer comprises a surfactant and / or an organic solvent. 4. The organic solvent has a vapor pressure of 10 ⁻² to 10
One or more selected from the group consisting of alcohols, glycols, ethers, esters and ketones having a water solubility within a range of ² mmHg (20 ° C.) and 10% by weight (20 ° C.) or more in water. The insect repellent according to claim 3, which is at least one kind of organic solvent. 5. The insect repellent according to claim 3, wherein the surfactant is a nonionic surfactant having an HLB value of 9 to 18 or a mixed surfactant containing the nonionic surfactant. Agent. 6. The insect repellent according to claim 1, wherein the water-absorbing polymer has a water-absorbing ability at room temperature (20 ° C.) 10 to 1,000 times its own weight. Agent.