JPH0222201A - Insecticidal formulation and insecticidal material - Google Patents

Abstract

PURPOSE:To obtain the title insecticidal formulation and insecticidal material preventing fall off of the microcapsule stably binding with a base material and reserving, and thus making possible to preserve an evasion effect in a long time of period, by making gradually releasing microcapsule including diethyltoluamide and specific copolymer. CONSTITUTION:A gradually releasing microcapsule of melamine resin, etc., including 1-100g/m<2> diethyltoluamide (N,N-diethyl-m-toluamide) is dispersed using a copolymer obtained from acrylamide and/or methacrylamide and one or two or more monomers having ethylenic unsaturated bond as a binder and an insecticidal formulation is prepared, then said formulation is held by base material such as paper, woven cloth, nonwoven cloth, synthetic resin film or wood to afford an insecticidal material. Said insecticidal formulation, etc., is useful for evading harmful insects such as cockroach or acarid. Besides, said insecticidal formulation and insecticidal material is able to prevent fall off of microcapsule by bending, scratching or cutting, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an insect repellent formulation and an insect repellent material for repelling pests such as cockroaches and mites.

More specifically, the present invention relates to an insect repellent formulation and an insect repellent material using sustained-release microcapsules containing N,N-diethyl-m-toluamide (hereinafter referred to as diethyl toluamide), which is an insect repellent compound.

[Prior Art] More than 1.8 million species of insects are known, and among these there is a group called sanitary pests that directly or indirectly have a negative impact on human life.

The following are the main sanitary pests:

Sharks cause severe itching, redness, and swelling when bitten, and can transmit infectious diseases such as Japanese encephalitis, dengue fever, yellow fever, malaria, and phyciliosis; adult female sharks can bite humans and livestock violently and transmit infectious diseases. Certain gnats, flies, and gnats;
Cockroaches that spread infectious disease bacteria such as Vibrio cholerae, Salmonella typhi, and Shigella, as well as pathogenic bacteria such as Mycobacterium tuberculosis; Chiggers that cause Tsutsugamushi disease; Dust mites that vigorously suck the blood of humans and livestock and can cause allergies. In addition, sanitary pests include clothing pests such as burrs and carp moths, fleas, flies, and even ants.

As a method for exterminating these sanitary pests, spraying of insecticides, use of aerosols containing insecticides as active ingredients, fumigants, etc. are generally carried out. However, the use of high-concentration pesticides is expected to have harmful effects on the human body, and pests may re-invade after a certain period of time has passed and the effectiveness of the pesticide has disappeared, and continuous use of pesticides may cause pests to There are problems such as acquiring drug resistance, making insecticides ineffective, and requiring die-off treatment.

As a way to avoid these problems, research has been conducted on repellents for sanitary pests, and many repellent substances,
For example, diethyltoluamide, N-butylacetoanilito, 2-ethyl-1,3-hexanediol, 2-butyl-2-ethyl-1°3-propanediol, propylmanplate, etc. were found.

Methods for applying repellents include insect repellent materials such as insect repellent paper, insect repellent sheets, and insect repellent tape; dissolve repellent ingredients such as diethyltoluamide in a suitable solvent or latex to carpet pile yarn, base fabric, backing material, etc. Avoid dust mites, etc. by applying, impregnating, mixing, etc. with repellent; make insect-proof furniture and cupboards by impregnating the ceilings of wardrobes, side panels, drawers, and cupboard members with repellents.

Among them, insect repellent materials have been widely used since they are easy to use, such as cutting and laying, but the molds are either paper impregnated with insecticide or repellent, or sheet-like materials with insecticides on one side. It is generally applied with a repellent or repellent. However, considering the impact on living organisms, using insect repellent paper or insect repellent sheets containing insecticides, especially organophosphorus insecticides, inside homes may be a safety problem for humans and pets. It can be said that it is more preferable.

However, conventional repellents have the following drawbacks.

In other words, it is desirable for the repellent to have a certain degree of vapor pressure and for the active ingredient to gradually volatilize; if the volatilization is too large, the repellent effectiveness period will be shortened, and if the volatilization is too small, the repellent effect will not be expressed. .

In addition, with the above-mentioned repellent mold (for example, a sheet impregnated with repellent), it is difficult to control the volatilization rate. There is a problem in that the effective period is greatly affected by environmental factors such as sunlight, temperature, moisture, etc., and it has been difficult to stably maintain the repellent effect.

Among these repellents, conventional repellents have a wide range of targets,
Diethyltoluamide is said to be the most ideal because it is highly safe and has an odor that humans do not dislike, but like the various repellents mentioned above, it has the disadvantage of poor long-term durability. Ta.

[Problems to be Solved by the Invention] As a result of intensive studies in order to achieve long-term sustainability of the repellent effect, the present inventors previously disclosed in Japanese Patent Application No. 62-24390 that the core material is made of diethyltoluamide, We also proposed a sustained-release microencapsulated insect repellent formulation whose wall material is made of microcapsules with sustained-release properties.

With this insect repellent formulation, the volatilization of medicinal efficacy can be freely adjusted and minimized to the necessary minimum, and compared to the raw material diethyltoluamide, it can provide repellent effects against various pests for an extremely long period of time. However, there was a problem in that the holding power (binding power) of the insect repellent formulation applied to the substrate etc. was weak.

That is, for example, in insect repellent paper, insect repellent sheets, insect repellent carpets, etc., the microcapsules fall off during folding or cutting operations, and in the case of insect repellent furniture, etc., there is a problem in that the insect repellent falls off due to mechanical contact.

Therefore, the object of the present invention is to control the volatilization of the drug by microcapsulating diethyltoluamide, to protect it from the surrounding environment, and to stably bind and hold the microcapsules to the base material, so that the microcapsules can be folded and ,
An object of the present invention is to provide an insect repellent preparation and an insect repellent material that can prevent microcapsules from falling off from a base material due to operations such as scratching or cutting, and can maintain a long-term repellent effect.

[Means for Solving the Problems] As a result of intensive research in order to solve the problems, the present inventors have developed microcapsules that have diethyltoluamide as a core material and a wall material that has sustained release properties. The above problem is solved by binding and holding a copolymer of methacrylamide and one or more monomers having an ethylenically unsaturated bond to a base material as a binder. The heading completes the invention.

That is, the present invention provides: 1) (i) sustained-release microcapsules containing N,N-diethyl-m-toluamide; (ii) acrylamide and/or methacrylamide; and a monomer having an ethylenically unsaturated bond. 2) an insect repellent formulation characterized by containing a copolymer with one or more types of insect repellent; ), and 3) the content ratio of the sustained release microcapsules and the above-mentioned copolymer is 05 to 1:1 in terms of solid content, sustained release microcapsules:copolymer-'l:o, respectively. The insect repellent formulation of 1) or 2) above, characterized in that 4) sustained release microcapsules containing N,N-diethyl-m-toluamide are combined with acrylamide and/or methacrylamide and an ethylenically unsaturated bond. 5) sustained-release microcapsules of N,N-diethyl-m-
The insect repellent material according to 4) above, characterized in that the toluamide content is 1 to 100 g/yrf; 6) the base material is made of a material selected from paper, woven fabric, nonwoven fabric, synthetic resin film, and wood; This invention relates to the insect repellent material according to feature 4) or 5) above.

[Function] In the present invention, diethyltoluamide is microencapsulated to control volatilization of the drug, protect it from the surrounding environment, and microcapsule 1? / and acrylamide and/or methacrylamide and one or two monomers having an ethylenically unsaturated bond.
By stably binding and holding the microcapsules to the substrate using a copolymer with more than 1 species, it is possible to prevent the microcapsules from falling off from the substrate due to operations such as bending, scratching, cutting, etc., and the repellent effect is maintained over a long period of time. made possible.

As specifically disclosed in Japanese Patent Application No. 62-24390, the sustained-release microcapsules containing diethyltoluamide according to the present invention have a core material made of diethyltoluamide and a wall material having sustained-release properties. It is something.

As a method for microencapsulation, interfacial polymerization method widely known in microcapsule production technology, 1n-si
tu method, phase separation method, submerged curing coating method (orifice method),
Submerged drying method, spraying/granulation method, etc. can be used, but interfacial polymerization method and 1ns+tu method are especially preferred because they enable effective and economical microencapsulation of diethyltoluamide. Useful.

As the wall material, any material can be used as long as it has sustained release properties for diethyltoluamide, but in particular polyamide resin, polyester resin, polyurea resin,
Preferred are polyurethane resins, urea resins, guanamine resins, melamine resins, and composite materials thereof.

The preferred ratio of the core material to the wall material is not particularly limited; The preferred weight ratio of core material to wall material is 1:
1 to 1:0.01, preferably 1:0.3
~l:o, 03.

In the present invention, in addition to the sustained-release microcapsules, acrylamide and/or methacrylamide and one type of monomer having an ethylenically unsaturated bond are used as a binder for binding and holding the microcapsules to a base material. Alternatively, a copolymer of two or more types is used.

The properties required of the binder include being able to uniformly disperse the microcapsules therein, having high adhesiveness to prevent the microcapsules from falling off from the substrate, and having high adhesion properties to prevent the microcapsules containing diethyltoluamide from being dispersed. (needs to have a small effect)

It is unsuitable to use an oil-soluble binder dissolved in an organic solvent as such a binder because the diethyltoluamide inside the sustained-release microcapsules will be rapidly eluted out of the pressure pellet.

Therefore, it is desirable to use a binder that is water-soluble or can be dispersed in water, but even if such a binder is compatible with diethyltoluamide, the diethyltoluamide will be eluted outside the capsule. , unsuitable as a binder.

Furthermore, even if it is water-soluble, from the viewpoint of environmental resistance, coating 45
It is desired that the dried material is not easily soluble.

As a result of intensive studies on binders from this point of view, we have found that a copolymer of acrylamide and/or methacrylamide and one or more monomers having an ethylenically unsaturated bond, preferably an aqueous solution thereof, is used. It has been found that the above requirements are met.

The monomer having an ethylenically unsaturated bond in the present invention may be any monomer as long as it is copolymerizable with acrylamide and/or methacrylamide, but preferably (
It is compatible with aqueous meth)acrylamide solution.

Specifically, for example, (meth)acrylic acid hydroxyalkyl esters in which the alkyl group has 1 to 4 carbon atoms, (meth)acrylic acid alkyl esters in which the alkyl group has 1 to 4 carbon atoms, (meth)acrylonitrile, and oxyethylene. Hydroxy or methoxypolyoxyethylene (meth)acrylate having 2 to 25 units, alkyl group having 1 to 25 carbon atoms
4. Nonionic monomers such as 2-hydroxyalkyl (meth)acrylamide; ammonium such as (meth)acrylic acid, itaconic acid, maleic acid, fumaric acid, styrenesulfonic acid, (meth)acrylamidopropanesulfonic acid, Anionic monomers of amine salts; cationic monomers such as (meth)acrylic acid dimethylamino ester or quaternized products thereof are preferred.

These monomers having ethylenically unsaturated bonds are preferably contained in the copolymer with acrylamide and/or methacrylamide in a proportion of 5 to 50% by weight.

In the present invention, the copolymer consisting of acrylamide and/or methacrylamide and one or more monomers having an ethylenically unsaturated bond is a polymer matrix,
Although any of low molecular weight substances and mixtures thereof can be used, those having a weight average molecular weight of about 50,000 to 300,000 are preferable.

In the present invention, are there any particular restrictions on the blending ratio and amount of sustained-release microcapsules encapsulating diethyltoluamide and the copolymer used as a binder? When pests need to be repelled for a long period of time, the amount of diethyltoluamide is 1 to 100 g/but, preferably 3.
~25g/TIi content, and sustained release microcapsule solid content: binder solid content is 'l: 0.
．． 05 to 1:1, preferably 1:0.1 to 1:0.6.

If the amount of binder is less than this ratio, the binding force will be weak and it will be difficult to stably hold the microcapsules on the substrate, while if the amount of microcapsules or binder is more than this, it will be economically disadvantageous.

In the present invention, the insect repellent formulation containing the above microcapsules and a binder is preferably used as a coating liquid in which the microcapsules are dispersed in an aqueous binder solution. At this time, the solid content in the binder aqueous solution in which the microcapsules are dispersed is 5 to 50%, preferably 10 to 30%.
%.

In the present invention, the above-mentioned coating liquid is coated or impregnated onto various base materials such as paper, woven fabric, non-woven fabric, synthetic resin film, wood, etc. to produce insect repellent materials such as insect repellent paper, insect repellent sheet, insect repellent tape, and insect repellent cloth. In addition, it is possible to apply or impregnate furniture such as chests of drawers, cupboards, wardrobe boxes, carpets, futon bars, sheets, etc. with the coating liquid for insect repellent treatment.

The insect repellent agent is held firmly in the base material coated with or impregnated with the above coating solution. Rui can produce molded products such as futon bars and sheets.

Further, the above insect repellent preparation may contain a perfume, a coloring agent, and the like.

[Example] The present invention will be described in more detail with reference to Examples below, but the present invention is not particularly limited thereto.

In addition, in the following description, "parts" and "%" expressing blending ratios are based on a small base unless otherwise specified.

[Preparation of test microcapsules]

135 parts of diethyltoluamide was added to 200 parts of a 3% aqueous solution of PI-14,5 prepared by dissolving styrene-maleic anhydride resin with a small amount of sodium hydroxide, and the particle size of the emulsion was adjusted using an ultra homogenizer. It was emulsified to a thickness of 10μ.

8.1 parts of melamine and 6.8 parts of 37% formaldehyde aqueous solution were added to 65 parts of water, and the mixture was adjusted to pl-19.5 with 20% sodium hydroxide aqueous solution and heated at 80°C for 15 minutes.
Added to the emulsion.

This was stirred for 2 hours at a liquid temperature of 75°C to obtain a dispersion of sustained-release microcapsules with melamine walls encapsulating diethyltoluamide.

The solid content in the dispersion was about 36%, and the active ingredient was about 32%.

(Test binder) As the water-soluble binder according to the present invention, the following (△), (
Three types of commercially available copolymers shown in B) and (C) were used.

In addition, water-soluble binders shown below (D> and below (
The water-dispersible binder shown in E) was used as a comparative binder.

Binder A (acrylamide/acrylonitrile copolymer): Binder for thermal paper manufactured by Showa Denko (product name)
TY-142> Binder 8 (acrylamide/2-hydroxypropyl methacrylate/methyl methacrylate copolymer); Binder for thermal paper manufactured by Showa Denko (trade name TY-02)
1) Binder C (acrylic 7mide/methacrylic acid 2-
Binder D: (Polyvinyl methyl ether) manufactured by Sangen Kagaku Kogyo ■ (Product name PVM-30W) Binder E: 5RB (styrene, butadiene rubber) latex manufactured by Asahi Kasei (trade name L-1876) Example 1 The sample binders (A) to (C) were added to the sample microcapsules obtained as described above as a solid content relative to the solid content of the microcapsules. They were added at 10% and 20% (W/W>), respectively.

This is 69/m in terms of diethyltoluamide on kraft paper.
The insect repellent papers (A) to (C) shown in Table 1 were obtained by applying 4 fi coats using a wire bar so that the results were as follows, and drying at 60° C. for 3 minutes after coating.

Comparative Example 1 Insect-proof papers (K) to (C) in Table 1 were obtained in the same manner as in Example 1 except that the sample binders were (D> and (E)).

In addition, as a comparative control with no binder added, the test microcapsules were coated with a wire bar to give a ratio of 69/m in terms of diethyltoluamide.
After drying for a minute, additive-free insect repellent paper shown in Table 1 was obtained.

Table 1 Example 2 The binding property between the insect repellent paper base material and the microcapsules prepared in Example 1 was evaluated by folding the insect repellent paper several times and determining whether the microcapsules fell off from the coated surface. Microcapsules on paper were observed using an electron microscope. The evaluation results are shown in Table 2.

The degree of microcapsules falling off from the coated surface in the table is as follows: (-): Not falling off at all, (+): Only a small portion falling off, (++): Falling off from several places on the coated surface. show.

Comparative Example 2 Example 2 except that the insect repellent paper prepared in Comparative Example 1 was used.
In the same manner as above, the binding property between the substrate and the microcapsules was evaluated, and the microcapsules on the insect repellent paper were observed using an electron microscope. The evaluation results are shown in Table 2.

As is clear from Table 2, the insect repellent papers (A) to (A) using the binder according to the present invention exhibit strong binding properties without the microcapsules falling off from the base material, and The microcapsules maintained their spherical shape without being particularly crushed.

In contrast, with additive-free insect repellent paper shown as a comparison, although the microcapsules on the base material maintain their spherical shape, the binding between the base material and the microcapsules is weak, and the microcapsules often fall off. It was seen.

In addition, insect repellent paper (K) using a binder outside the scope of the present invention
In ~(C), although the adhesion to the substrate is relatively good, the microcapsules on the substrate have a crushed shape, and as described later, the repellent effect is long-lasting. I couldn't.

Table 2 Example 3 Using the insect repellent papers (A) to (Character) prepared in Example 1, they were left standing in a constant temperature and humidity room at 23°C and 165% RH, and the diethyl The residual amount of toluamide was measured. The results are shown in Table 3 as the residual rate relative to the amount of coating.

Comparative Example 3 Residual amount of diethyltoluamide after 1 month and 3 months in the same manner as in Example 3 except that insect repellent paper (K) to (K) prepared in Comparative Example 1 and additive-free insect repellent paper were used. The results are shown in Table 3.

As a separate comparison, diethyltoluamide raw material was diluted with ethanol, and 6 g/'rIi of diethyltoluamide raw material diluted with diluted camphor was applied to high-quality paper, and this was used as "raw material coated paper". Table 3 shows the results of a test similar to the above.

As is clear from Table 3, the active ingredients of the insect repellent paper using the binder outside the scope of the present invention (Ki~(K) and the base coated paper were all rapidly lost, whereas the active ingredients of the insect repellent paper using the binder outside the scope of the present invention Insect-proof papers (A) to (Riki) using binders had the same high retention of active ingredients as additive-free paper.

Table 3 - Example 4: Test of repellent effect on mites Using the insect repellent papers (A) to (Toku) prepared in Example 1, the repellent effect on mites and mites was investigated.

First, each of the insect repellent papers (A) to (Character) was cut into 7 x 7 cm pieces, and the cut papers were placed in a hollow vat placed in a chamber at 25°C and 90% RH.

Next, powdered feed with a moisture content of 15% was applied to the surface of each insect repellent cut paper for 2 hours. Each piece of paper was uniformly placed, and a small amount of medium in which a large number of mites were propagated was placed between the pieces of insect-proof cut paper.

To evaluate the repellent effect, 1 day, 1 month, 3 months, and 6 months after the tick inoculation, black rasher paper cut into 5 x 5 cm pieces was placed one by one on insect repellent cut paper, and 3 hours later, the front and back sides were checked. This was done by counting the number of live mites. The results are shown in Table 4.

Comparative Example 4 The same procedures as in Example 4 were carried out, except that the insect repellent papers (K) to (K) prepared in Comparative Example 1 and the additive-free insect repellent paper and the bulk-coated paper prepared in Comparative Example 3 were used, respectively. We investigated the repellent effect of insect repellent paper on woolly mites and mites. The results are shown in Table 4.

As is clear from Table 4, all of the insect repellent papers using the binder according to the present invention exhibited a high repellent effect against mites.

Example 5 Test binders (A) to (C) in test microcapsules
were added at a solid content of 5% and 15% (W/W> based on the solid content of the microcapsules, respectively).

This was applied to synthetic paper (manufactured by Tamago Yuka Synthetic Paper Co., Ltd., Yupo #130 (trade name)) at 5 and 10 y in terms of diethyltoluamide.
/m with a wire bar and apply! 10 after 5
Dry at 5℃ for 2 minutes to form the insect repellent sheets (S) to (D) in Table 5.
I got it.

The binding properties between the base material of these insect repellent sheets and the microcapsules were evaluated by loosening the insect repellent sheets by hand and checking whether the microcapsules fell off from the coated surface. Observed. The evaluation results are shown in Table 6.

'cj: iJ'3, The degree of microcapsule falling off from the coated surface in the table is as follows: (-): Not falling off at all, (+): Only a small portion falling off, (++): Number of coated surfaces It has fallen off in some places, indicating.

Comparative Example 5 Insect-proof sheets (N) to (E) in Table 5 were obtained in the same manner as in Example 5 except that the test binders were (D) and (E).

In addition, as a comparative control without the addition of a binder, the test microcapsules were treated with dienanitoriamide itch at 5 and 10
g/TIi and dried to obtain 1 q of insect repellent sheets shown in Table 5 as "Additive-free-5" and "Additive-free-10J".

The binding properties between the base material of these insect repellent sheets and the microcapsules were evaluated in the same manner as in Example 5, and the microcapsules on the insect repellent sheets were observed using an electron microscope 1). The evaluation results are shown in Table 6.

As is clear from Table 6, the insect repellent sheets (i) to (d) using the binder according to the present invention exhibit strong binding properties with no microcapsules falling off from the base material, and
The microcapsules on the base material were not particularly crushed and maintained their spherical shape.

On the other hand, in the insect repellent sheets with No Additives-5 and No Additives-10 shown as comparative controls, although the microcapsules on the base material maintained their spherical shape, the binding between the base material and the microcapsules was poor. was weak, and microcapsules were observed to fall off.

In addition, although the insect repellent sheets (N) to (E) using binders outside the scope of the present invention have relatively good binding properties with the base material, the microcapsules on the base material have a crushed shape. However, the repellent effect could not be maintained over a long period of time.

Example 6; Repellent effect test against German cockroach Insect repellent sheet prepared in Example 5 and illustrated in Table 5: (C),
A repellent effect test against German cockroaches was conducted using (C), (R), (T), (G), and (D).

The repellent effect test against the German cockroach was conducted as follows, and the evaluation results are summarized in Table 7.

First, using each of the above insect repellent sheets 1 to 1, make a 2 x 10 x 7 cm rectangular box with the coated side of these insect repellent sheets inside, and place 1 of the 2 x 7 cm side of this box.
Holes with a width of 1 cm were made in several places.

Next, a large vat was prepared, and one box each obtained from the above-mentioned insect repellent sheet and one box not treated with the chemical (control) were arranged on the vat.

After preparing a total of 4 pieces of similar Para 1~, these were heated at 23°C.
Leave it standing in a constant temperature room with 65% RH, and 1 day after coating,
After 1 month, 4 months, and 6 months, 100 adult German cockroaches (50 male and 50 male) were placed in each pad, and 3 days after the introduction of the German cockroaches, the number of German cockroaches in the 8 boxes was counted. The repellent effect was evaluated.

Comparative Example 6 Using the insect repellent sheets prepared in Comparative Example 5 (N), (C), ()) and (E) and the additive-free insect repellent sheet No. 10, diethyltoluamide raw material was also used. diluted with ethanol to give 10g in terms of diethyltoluamide raw material.
The repellent effect of each insect repellent sheet on German cockroaches was investigated in the same manner as in Example 6, except that the insect repellent sheet prepared by coating the insect repellent sheet at a concentration of 10 J was used as the original coating 10J.The results are shown in Table 7. show.

As is clear from Table 7, (C), (C), (RI), (T), (G) and (C) using the binder according to the present invention
The insect repellent sheet (iv) maintained its repellent effect over a long period of time, similar to the additive-free sheet.

However, in the insect repellent sheets and bulk-coated sheets of (N), (C), ()) and (E), which used binders outside the scope of the present invention, the repellent effect was quickly lost.

Example 7 Sample binders (A) to (C) in sample microcapsules
10 as solid content to microcapsule solid content.
% (W/W), and this was applied to cardboard with a diethyltoluamide exchanger to give a ratio of 109/m, and after drying, it was molded into a costume box to obtain an insect-proof costume box. .

This costume box had an excellent long-lasting repellent effect.

Example 8 Sample binders (A) to (C) in sample microcapsules
15 as a solid content relative to the microcapsule solid content.
% (W/W>) and siloed it on the surface of synthetic paper with release paper to obtain an insect repellent tape.

This insect repellent tape had an excellent long-term repellent effect.

Example 9 On the surface of the primary base fabric (polypropylene) of the carpet material, the solid content was 20% based on the solid content of the microcapsules.
% (W/W) of the sample binders (A) to (C
) were added at 1.5 cm intervals so that the amount was 10 g/Td in terms of diethyltoluamide, and 5
It was applied in stripes with a width of cm.

After weaving polypropylene pile yarn into this primary base fabric, a secondary base fabric (jute) was adhered to create an insect-proof carpet.

This insect repellent carpet had an excellent long-lasting repellent effect.

Example 10 10% solid content (based on microcapsule solid content)
Sample binders (A) to (C) of W/W) were respectively added, and acrylic pile yarn was impregnated therein.

After drying, this pile yarn was fixed to the first base fabric, and then a second base fabric was adhered thereon to create an insect-proof carpet.

This insect repellent carpet had an excellent long-lasting repellent effect.

[Effects of the Invention] As explained above, in the present invention, the volatilization of the drug is controlled with diethyltoluamide and the drug is protected from the surrounding environment, and the microcapsules are protected with acrylamide and/or methacrylamide and ethylene. By using a copolymer with one or more monomers having sexually unsaturated bonds to stably bind and hold onto the substrate, it is possible to remove micro particles from the substrate during operations such as bending, scratching, and cutting. It has become possible to provide an insect repellent formulation that prevents capsules from falling off and has a long-lasting repellent effect.

In addition, this insect repellent formulation can be used in a wide range of fields,
By using this, it is possible to easily perform insect repellent treatment with excellent long-lasting repellent effects on various base materials, and it is also possible to provide insect repellent materials and molded products with excellent long-lasting repellent effects. became.

Claims (1)

[Scope of Claims] 1) (i) Sustained-release microcapsules containing N,N-diethyl-m-toluamide, (ii) acrylamide and/or methacrylamide, and a monomer having an ethylenically unsaturated bond An insect repellent formulation comprising a copolymer with one or more types of insect repellent. 2) The insect repellent preparation according to claim 1, characterized in that sustained-release microcapsules are dispersed in the copolymer aqueous solution. 3) A patent characterized in that the content ratio of sustained-release microcapsules and the copolymer is sustained-release microcapsule:copolymer=1:0.05 to 1:1, respectively, in terms of solid content. An insect repellent formulation according to claim 1 or 2. 4) A sustained release microcapsule containing N,N-diethyl-m-toluamide is copolymerized with acrylamide and/or methacrylamide and one or more monomers having an ethylenically unsaturated bond. An insect repellent material characterized by being held on a base material by coalescence. 5) Sustained-release microcapsules of N,N-diethyl-m-
The insect repellent material according to claim 4, characterized in that the toluamide content is 1 to 100 g/m^2. 6) The insect repellent material according to claim 4 or 5, wherein the base material is made of a material selected from paper, woven fabric, nonwoven fabric, synthetic resin film, and wood.