JPH02270803A - Insectproof net - Google Patents

Abstract

PURPOSE:To obtain an insectproof net having excellent applicability, effect and low cost without excess oozing out of drug to the surface and also having sustained releasability by heat-molding a mixture of ethylene-vinyl acetate-based resin and empenthrin, or the same two and control agent of harmful insect. CONSTITUTION:Ethylene-vinyl acetate-based resin is mixed with empenthrin as pyrethroid having volatility at normal temperature, or mixture of the sane empenthrin and one or more control agent of harmful insects and resultant mixture is heated and molded to afford the aimed insectproof net. As control agent of harmful insect mixed as active ingredient is suitably pyrethroid-based compound from the viewpoint of effect and safety and e.g., 3-allyl-2- methylcyclopenta-2-ene-4-one-1-yl dl-cis/trans-chrysanthemate is exemplified. Single matter of empenthrin or a mixture of same empenthrin and other control agent of harmful insect is mixed in an amount of 0.1-5.0wt.% to total weight of the resin in the aimed composition.

Description

[Detailed description of the invention] [Industrial application field] The present invention applies to flies, mosquitoes, fleas, ticks, and cockroaches.

This invention relates to a synthetic resin net for controlling pests such as ants, burs, and cutworms.

[Conventional technology]

In recent years, changes in the living environment have had a major impact on the habitat patterns of various pests, and flies, mosquitoes, cockroaches, and a variety of other pests are becoming social problems.

For example, the habit of deep cleaning has disappeared, and the housing environment has become hot and humid due to the increase in the number of apartment buildings made of concrete, which has led to the inhabitation of microscopic pests such as indoor dust mites and wasps. Furthermore, as housing development spreads to rural and mountainous areas, black ants, termites, and black flies enter homes from outside.

Damage and complaints from unpleasant pests such as midges and woolly beetles are increasing.

On the other hand, with the spread of bedding for dogs and cats, fleas, lice, and ticks attached to these beds have become important targets for pest control, and there have also been many reports of damage caused by clothing pests that attack clothing9 blankets, futons, carpets, etc. has been done.

The methods of controlling these pests include: 1. Release the chemical toward the pest.

2. Wait for pests to come into contact with the pre-applied chemicals.

There are two cases, and the former type, such as mosquito coils, aerosols, and fumigants, are the mainstream household insecticides, but from the viewpoint of ease of use, sustainability of efficacy, safety, etc.
A review of the latter is required.

In particular, various attempts have been made to develop insect-proof sheets and insect-proof nets because they are easy to use by simply laying, wrapping, or hanging them.
No. 039 discloses a pest control net made of heat-molded chlorinated polyethylene, a thermoplastic elastomer, and an amide repellent alone or as a mixture, and is also disclosed in Japanese Utility Model Publication No. 62-440.
Publication No. 01 states that the saturated absorption amount of the insecticide or insect repellent is 0.5% by weight or more, and the saturated absorption amount is 0.8% by weight or less on both sides of a layer consisting of a resin of 10% by weight or less. Although a multilayer resin film having layers made of resins has been disclosed, it is currently not sufficient in terms of usability and efficacy.

[Problem that the invention seeks to solve]

In general, insect repellent sheets and insect nets are used on kitchen floors, in cupboards, under sinks and refrigerators, under carpets and tatami mats, in dressers and drawers, as clothes covers, curtains for large sheds, and on floor sheets. Alternatively, mesh jackets for dogs and cats can be considered, but in many cases, breathability is required to prevent deterioration of quality or for hygiene reasons, and insect-proof net types are considered more suitable.

By the way, the invention disclosed in JP-A No. 62-1.55039 relates to a synthetic resin net containing an amide repellent, but the amide repellent has poor volatility at room temperature and its repellency is not effective. As the insect repellent effect is not sufficient, there are also problems in that the applications for which it can be used are limited.

[Failure to solve the problem]

In view of the above-mentioned current situation, the present inventors conducted intensive research with the aim of developing a formulation that exhibits high insecticidal efficacy in a wide range of usage situations while taking advantage of the advantages of insect repellent nets. The inventors discovered that an insect repellent net formed by heat-molding a mixture of empenthrin or haempenthrin, which is a birenuloid volatile at room temperature, and one or more insect control agents as an active ingredient, is suitable for this purpose and completed the present invention. .

In other words, while empenthrin kills insect pests that come into contact with the insect net, it gradually evaporates from the resin, so its insect repellent effect extends to the surrounding space, including areas such as clothes pests such as dressers and drawers where conventional nets were not expected to be effective. A wide range of applications has become possible.

Empenthrin used in the present invention has higher insecticidal efficacy and safety than conventional clothing insect repellents such as paradichlorobenzene, naphthalene, and camphor. Although it has recently become popular as a rem-shaped insect repellent sheet, no attempt was made to make it into an insect repellent net due to manufacturing problems.

However, the present inventors have developed an insect repellent net that is molded using a synthetic resin mainly composed of ethylene-vinyl acetate resin, which prevents excessive seepage of the drug onto the surface, and which also has sustained release properties. I ended up getting it.

In addition to the above-mentioned empenthrin as an active ingredient, the insect control net of the present invention contains an appropriate pest control agent.

From the viewpoint of efficacy and safety, birenuloid compounds are preferred as insecticides, and the following may be exemplified.

(a) 3-allyl-2-methylcyclobent-2-en-4-one-1-y/vdlnesis/trans-chrysanthemate (generic name: allethrin; trade name: pinamine:
(manufactured by Sumitomo Chemical Co., Ltd.) (b) 3-allyl-2-methylcycloventer-2-en-4-one-1-y/L/d-ence/trannucrisantemate (product name: Pinamine Forte: Manufactured by Sumitomo Chemical Co., Ltd., hereinafter abbreviated as insecticide A) (c) d
-3-allyl-2-methylcyclobent-2-ene-4
-one-1-i1Vd-trans-chrysanthemate (
(Product name: Exrin: Manufactured by Sumitomo Chemical Co., Ltd.) (d) 3-Aliyv-2-methylcyclobent-2-en-4-one-1-yl d-tranucrysanthemate (-some names bioallethrin) ( e) 2-methytv-4-oxo-3-(2-propy=
/l/) cycloventer-2-enyl chrysanthemate (f) (S)-2-methy1v-4-oxo-3-(2-
provini/I/) cycloventer-2-enyl d-cis/trans-chrysanthemate (-some names prarenulin,
(hereinafter abbreviated as insecticide B) (g) N-(3,4,5,6-titrahydrophthalimido)methyl d-cis/trans-chrysanthemate (-Several names: Phthalnurine: Product name: Neopinamine forte:
(manufactured by Sumitomo Chemical Co., Ltd.) (h) 3-phenoxypencyl 2-(4-ethoxyphenyl 12/L') -2-methylpropyl ether (-several names: ethofene procnu) (1) 5-benzi)v -3-furylmethy/I/ d-sinu/trannucrisantemate (generic name: renumethrin; trade name: Crysuronforte, manufactured by Sumitomo Chemical Co., Ltd., hereinafter abbreviated as insecticide C) (j) 5-bropargi/l /-2-Furylmethyl chrysanthemate (-Furametrin) (k) 5-propargine v-2-Furi/remethyl d-
Cis/trans-chrysanthemate (trade name: Binamine D Forte: manufactured by Sumitomo Chemical Co., Ltd., hereinafter abbreviated as insecticide) (1) 3-7=c-noxyben') 7v2, 2-dimethy)v-3 -(2,2-dichlorovinyl)cyclopropanecarboxylate (-Several names: Vermethrin 24 products, manufactured by Sumitomo Chemical Co., Ltd., hereinafter abbreviated as insecticide E) (m) 3-phenoxybenzi/L/ d-cis/trans-chrysanthemate (-Several names Fetuthrin: nθ Product name Numisthrin: Manufactured by Sumitomo Chemical Co., Ltd., hereinafter abbreviated as insecticide F) (n) α-cyano-3-phenoxybenzi/I/ α
-Isopropyl-4-chlorophenylacetate (-several people), Nvalerate: Trade name Sumicidine, manufactured by Sumitomo Chemical Co., Ltd.) (0) (S) -〇-Cyano 3-Finoxypendi yv
(s)-α-isopropylv-4-chlorophenylacetate (-several namesake suf, amparelate) (pXS)-α-cyano-3-phenoxybenziv(
lR.

3R)-3-(2,2-diku'aabi=tv)-2,2
-dimethylcyclopropanecarboxy-V-t ((1)
(B S )-α-cyano-3-71-dibenzyl (
lR3)-cis/trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate (-several names: cybe-methrin) (r) Ql-cyano-
3-phenoxybenziVd-cis/trans-chrysanthemate (-several names Schiff ℃ nodrin, hereinafter abbreviated as insecticide G) (8) ff-sil/-3-7? / Kishibenzi lv2,2
．． 3゜3-tetramethylcyclopropanecarboxylate (-several names) t-propathrin) (t) C (bentaph-olof, 2/L/)-methyl)
(IE3゜3R)-3-(2,2-dichlorovinyl)
-2,2-dimethylcyclopropane) ruboxylate (
- several people) tenfluthrin) (u) 3-aria+/-2-methyl-cycloventer 2
-en-4-one-1-i/L' 2,2,3.3-
Tetramethylcyclopropanecarboxylate (-several names Telalethrin) (v) 1-ethynyl-2-methy/L/-2-pentenyl 2゜2-dimethyl-3-(2,2-dichloroviny/L
/) Cyclopropane carboxylate (W) dimethyl (4-ethoxyphenyl) f3-(3-
In addition to the above, organophosphorus insecticides such as fenitrothion, diazinon, viridafunthion, NAC, MT
Carbamate insecticides such as MC%PHC can also be used.

Special Niemben [Rin, Insecticide E, Insecticide F, Insecticide G
If used in combination with low-volatile pyrethroid insecticides such as Insecticide H, not only will the volatilization of empenthrin have an insect repellent effect, but the persistent pyrethroids will also exert an insecticidal effect on contact over a long period of time, and a double effect can be expected. It is something.

However, repellents such as N,N-diethyl-m-)ylamide, N-butylacetanilide, N,N-diethylsuccinamate, 2,4,4'-trichloro-2'-hydroxysif, Ether, 2,3,5.6-titrachloro4-(methylsulfoni)V) pyridine, alkylbenzyldimethylammonium chloride, N-(
Fluorodichloromethylthio)phthalimide, N-1
- Bactericidal agents such as dichloromethylthiotetrahydrophthalimide, ethylenebinu(dithiocarbamate) manganese, or, if necessary, stabilizers, synergists, deodorants, fragrances, pigments, and other auxiliary agents are appropriately mixed to achieve excellent effects. It can also be used as a multipurpose insect repellent net.

The above-mentioned empenthrin alone or a mixture of it and other pest control agents exhibits a remarkable pest control effect if it is blended in the shell at OL ~ 5.0 weight l1% based on the total weight of the resin, If necessary, an appropriate amount of filler may be added to the composition.

The present invention is characterized in that the above-mentioned insecticidal composition is blended with ethylene-vinyl acetate resin and molded under heat. Resins such as polyethylene, polypropylene, and polyvinyl chloride have also been considered, but these resins require high molding temperatures and are undesirable due to concerns about decomposition of the insecticidal composition.

When empenthrin comes in contact with metallic copper itself or wrapping paper printed with ink containing metallic copper, it may cause discoloration or cause discoloration or stains on clothing stored for insect repellent scales. However, surprisingly, when blended with ethylene-viny acetate/V yarn resin, the degree of discoloration and staining is suppressed to a very low level compared to polyethylene or polypropylene. It has become clear that this is extremely advantageous.

In carrying out the present invention, it is preferable to use an ethylene-vinyl acetate copolymer as the main ingredient, blended with an appropriate polymer for the purpose of homogenization and sustained release. For example, it is heated and formed into a net shape using an extruder.

The thread thickness and mesh size of this net can be freely changed depending on the target pest; for example, when using it as a carpet or tatami mat underlay, the thread thickness should be 0.3 to 1 mm. degree, mesh size 2~
It is appropriate to have a culm degree of 50 mm, which is 1. If used for controlling insect pests on clothing, etc., the thickness of the thread should be 0.2 to 0.5.
It is appropriate that the mesh size be about 2 to 4 mm.

The thus obtained insect repellent net of the present invention is highly flexible, easy to bend and cut, and has excellent usability, and can be used on kitchen floors, cupboards, etc.
Can be placed under sinks or refrigerators, under carpets or tatami mats, sheets stored in dressers or drawers, clothes covers, curtains for large sheds, floor sheets, mesh jackets for dogs, cats, etc., or hung or pasted. It is applied by applying it and has a crystalline insect repellent effect.

Particularly in closed conditions, use insect repellent sheets in situations where it would be unwise to use insect repellent sheets, such as leather products and fur products where mold may grow or quality deterioration is a concern, as well as animal bedding applications that require deodorization and hygiene. , the usefulness of this insect repellent net is remarkable.

Next, the present invention will be explained in more detail with reference to Examples, but it goes without saying that the present invention is not limited to these examples.

Example 1 Using ethylene-vinyl acetate copolymer and chlorinated polyethylene as a sustained release controller, the insecticidal composition shown in the table below was mixed and heated to form a thread with a thickness of 0.3 mm.
An insect-proof net with a mesh size of 3 mm was obtained.

As a comparative example, an insect repellent net molded from polypropylene was also tested.

Cut each test net into pieces of 1OX10c+++.
0j? I placed it at the bottom of a drawer and placed four layers of blankets on top of it. Five burr larvae were released on a blanket at predetermined intervals and their feeding damage was observed for one week. Wrapping paper printed using brass was placed in contact with the net to observe the occurrence of discoloration. , I guessed it.

As a result of the test, the insect repellent net of the present invention showed a remarkable insect repellent effect of volatilized empenthrin, and the effect lasted for more than 9 months. On the other hand, when only DEET or insecticide E was used without incorporating empenthrin, no insect repellent effect due to volatilization could be expected, so it was unsuitable for use in controlling insect pests on clothing.

In addition, discoloration of the wrapping paper was observed in Control Nets 3 and 4, which used polypropylene as the synthetic resin, but no discoloration was observed in the net of the present invention, which is mainly made of ethylene-vinyl acetate copolymer, indicating its usefulness. was confirmed.

Example 2 Insect-proof nets 2 and 3 of the present invention of Example 1 were used to make a jacket to be wrapped around a dog's body.

When applied to a dog with lice and observed after 3 days, no lice were found to have survived.

Furthermore, when an insect repellent sheet prepared with a similar composition was worn on a dog, swelling and rashes were observed on the dog's body surface, making it clear that a highly breathable net is preferable.

Example 3 Example 10 1X1r using insect control nets 2 and 4 of the present invention
I made a floor sheet for the large hut and laid it on the artificial grass near the entrance of the large hut.

Insect nets not only prevent the invasion of cockroaches, ants, and mites, but they are also effective against flying pests such as mosquitoes and gnats, and are extremely helpful in maintaining health.

Also, unlike insect repellent sheets, it did not lose the feel of artificial turf that dogs like, and was also superior in terms of hygiene.

〔Effect of the invention〕

The present invention provides an insect repellent net that is excellent in usability, effectiveness, and all 111 aspects by blending empenthrin, a pyrethroid that is volatile at room temperature, and selecting the material of the synthetic resin film.

Patent applicant: Dainippon Jomugiku Co., Ltd. Representative Director Eisuke Kamiyama

Claims (1)

[Claims] An insect control net made by heat-molding a mixture of ethylene-vinyl acetate resin, empenthrin, or empenthrin and one or more pest control agents.