Pest control composition

Abstract

To provide a pest control composition which demonstrates pest control effectiveness over a prolonged period.SOLUTION: A pest control composition comprising (A) an insecticidal component and (B) an alkyl acrylate copolymer methylpolysiloxane ester. Preferably, the pest control composition according to claim 1 comprises the insecticidal component that includes an insecticidal component having a vapor pressure of 1.33×10-3 Pa or more at 25°C.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a pest control composition. [Background technology]

[0002] BACKGROUND ART When controlling pests that occur outdoors, pest control compositions that are expected to have a long-term control effect have been proposed (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-157055 Summary of the Invention [Problem to be solved by the invention]

[0004] Consumers are demanding a longer-lasting insect control effect, and an object of the present invention is to provide a pest control composition that can provide an insect control effect for a longer period of time. [Means for solving the problem]

[0005] The present inventors have conducted extensive research to solve the above problems and have arrived at the present invention. [1] A pest control composition comprising A) an insect repellent component and B) an alkyl acrylate copolymer methylpolysiloxane ester. [2] The above insect repellent ingredient has a vapor pressure of 1.33 x 10 at 25°C. -3 A pest control composition containing an insect repellent component having a Pa or higher. [3] A composition for controlling pests, wherein the insect repellent component is selected from the group consisting of N,N-diethyl-m-toluamide, 3-(Nn-butyl-N-acetyl)aminopropionic acid ethyl ester, 1-methylpropyl 2-(2-hydroxyethyl)-1-piperidinecarboxylate, and p-menthane-3,8-diol. [4] A pest control composition, wherein the insect repellent component is N,N-diethyl-m-toluamide. [5] An insect control method comprising treating an object with the above-mentioned pest control composition. to provide. [Effects of the Invention]

[0006] According to the pest control composition of the present invention, the insect control component can be stabilized for a long period of time, thereby enabling the insect control effect of the pest control composition to be extended for a longer period of time. DETAILED DESCRIPTION OF THE INVENTION

[0007] The insect repellent component of the present invention may be, but is not particularly limited to, a hardly volatile insect repellent component or an insect repellent component volatile at room temperature. Examples of hardly volatile insect repellent components include pyrethroid compounds such as permethrin, cyfluthrin, imiprothrin, etofenprox, furamethrin, fenpropathrin, momfluorothrin, fenothrin, cyphenothrin, cypermethrin, bifenthrin, tralomethrin, allethrin, phthalthrin, prallethrin, resmethrin, and natural pyrethrins. Examples of room temperature volatile insect repellent ingredients include pyrethroid compounds such as empenthrin, profluthrin, metofluthrin, and transfluthrin, as well as compounds such as N,N-diethyl-m-toluamide (hereinafter also referred to as DEET), 3-(Nn-butyl-N-acetyl)aminopropionic acid ethyl ester, 1-methylpropyl 2-(2-hydroxyethyl)-1-piperidinecarboxylate, and p-menthane-3,8-diol. The room temperature volatile insect repellent ingredient referred to in the present invention is an insect repellent ingredient having a vapor pressure of 1.33 x 10 at 25°C. -3 Pa or more, and a non-volatile insect repellent is one with a vapor pressure of 1.33 x 10 at 25°C. -3 This refers to insect repellent ingredients that are less than Pa.

[0008] The insect repellent components used in the present invention may be used alone or in combination of two or more kinds.

[0009] The content of the insect repellent component of the present invention varies depending on the type of insect repellent component used, but is usually 0.01 to 30.0% by weight based on the total amount of the composition.

[0010] The alkyl acrylate copolymer methylpolysiloxane ester of the present invention may be, for example, a product sold under the name KP-541, KP-543, KP-545, KP-545L, or KP-550 (manufactured by Shin-Etsu Chemical Co., Ltd.), or My Block Wako 101 (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.).

[0011] In the pest control composition of the present invention, the ratio of the insect repellent component to the alkyl acrylate copolymer methylpolysiloxane ester is preferably 1:0.1 to 1:2.0 by weight. Among the insect repellent components, it is preferred to use an insect repellent component that is volatile at room temperature, since the effect is exhibited at least with the amount of alkyl acrylate copolymer methylpolysiloxane ester added. Among these, it is more preferred to use N,N-diethyl-m-toluamide, 3-(Nn-butyl-N-acetyl)aminopropionic acid ethyl ester, 1-methylpropyl 2-(2-hydroxyethyl)-1-piperidinecarboxylate, or p-menthane-3,8-diol, and N,N-diethyl-m-toluamide is particularly preferred.

[0012] The pest control composition of the present invention is usually formulated into a liquid, aerosol, gel, cream or other formulation by adding a solvent.

[0013] Examples of the solvent include hydrocarbon solvents, alcohol solvents, ester solvents, glycol solvents, glycol ether solvents, silicone solvents, water, ketone solvents, etc. A single solvent may be used, or two or more solvents may be used, and the solvent may be selected by adjusting appropriately depending on the solubility, formulation, and application of the pest control composition of the present invention.

[0014] Examples of hydrocarbon solvents include normal paraffin solvents, isoparaffin solvents, naphthenic solvents, and aromatic solvents.

[0015] Examples of alcohol-based solvents include methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, 2-methyl-2-propanol, benzyl alcohol, and phenoxyethanol.

[0016] Examples of the ester solvent include ethyl acetate, propyl acetate, isobutyl acetate, butyl acetate, methyl lactate, ethyl lactate, and butyl lactate.

[0017] Examples of glycol-based solvents include ethylene glycol, diethylene glycol, propylene glycol, polyethylene glycol, and polypropylene glycol.

[0018] Examples of glycol ether solvents include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol mono-n-butyl ether, ethylene glycol mono-tert-butyl ether, 2-ethoxyethyl acetate, 3-methoxy-3-methylbutanol, 3-methoxy-3-methylbutyl acetate, 1-methoxy-2-propanol, 1-methoxypropyl-2-acetate, 1-ethoxy-2-propanol, propylene glycol monopropyl ether, 3-methoxybutyl acetate, ethyl 3-ethoxypropionate, propylene glycol monomethyl ether propionate, diethylene glycol monobutyl ether, and triethylene glycol monobutyl ether.

[0019] Examples of silicone solvents include octamethyltrisiloxane, methylpolysiloxane, and cyclopentasiloxane.

[0020] Examples of ketone solvents include acetone, methyl ethyl ketone, methyl isobutyl ketone, diisobutyl ketone, cyclohexanone, 4-hydroxy-4-methyl-2-pentanone, and isophorone.

[0021] The pest control composition of the present invention may further contain additives to the extent that the effects of the present invention are not impaired. Examples of additives include surfactants, fragrances, antifungal agents, antibacterial agents, antiviral agents, antistatic agents, UV absorbers, light scattering agents, antioxidants, hindered amine light stabilizers, pigments, rust inhibitors, antifoaming agents, moisturizers, thickeners, etc.

[0022] The present invention provides a long-term insect control effect by treating an object with the pest control composition. The insect control effect here includes not only insecticidal and repellent effects, but also the effect of preventing pest nesting. Depending on the formulation, it is recommended to pre-treat objects through which pests may pass or approach, such as floors, curtains, walls, fences, exterior walls of buildings, window glass, screen doors, under eaves, entrances, verandas, hedges, garden trees, clothing, hats, sofas, tents, and skin. The pest control composition of the present invention can also be applied directly to pests.

[0023] The pests to be controlled by the pest control composition of the present invention are not particularly limited and include creeping pests such as ants, bedbugs, leaf beetles, ground beetles, mealworms, dermestid beetles, weevils, cockroaches, termites, crickets, cockroaches, earwigs, fleas, silverfish, centipedes, millipedes, pill bugs, woodlice, scorpions, spiders, and mites, and flying pests such as flies, horseflies, black flies, wasps, midges, mosquitoes, moths, planthoppers, leafhoppers, crane flies, mayflies, thrips, stink bugs, and aphids. The composition is also effective against pests other than insects, such as leeches and slugs. [Example]

[0024] The present invention will be further explained below with reference to examples, but the present invention is not limited to these examples.

[0025] [Preparation of pest control composition] Various pest control compositions shown in Tables 1 and 2 were prepared using permethrin as a hardly volatile insect repellent ingredient and DEET as an insect repellent ingredient volatile at room temperature.

[0026] [Table 1] KP550: 40% alkyl acrylate copolymer methylpolysiloxane ester in isododecane, manufactured by Shin-Etsu Chemical Co., Ltd. Sumisorb300: UV absorber, manufactured by Sumika Chemtex Co., Ltd. Tinuvin 292: Hindered amine light stabilizer, manufactured by BASF IP Clean LX: Isoparaffinic hydrocarbon, manufactured by Idemitsu Oil Co., Ltd.

[0027] [Table 2] KP-543: 50% alkyl acrylate copolymer methylpolysiloxane ester in butyl acetate, manufactured by Shin-Etsu Chemical Co., Ltd.

[0028] [Photostability test] A light stability test was conducted on the pest control compositions. 1 mL of each pest control composition was dropped onto an aluminum foil petri dish (product number: No. 2001, manufactured by Kokugo Co., Ltd.), which was then placed in a xenon weathering tester (Q-SUN Xe-1, manufactured by Q-Lab), fitted with an optical filter (Daylight-BB, manufactured by Q-Lab), and exposed to light at an illuminance of 60 W / m2 (illuminance sensor: UC20 / TUV) and an internal temperature of 30°C.

[0029] [Insect repellent ingredient retention efficiency] The time at which the residual rate of the insect repellent component in the pest control compositions of Formulation Example 1 and Formulation Example 2, which do not contain alkyl acrylate copolymer, reaches approximately 50% was defined as the reference irradiation time, and the manifestation of the effect (also referred to as insect repellent component residual efficiency) relative to the compounding ratio of the insect repellent component to alkyl acrylate copolymer was evaluated using the following formula. The residual rate (wt %) of the insect repellent ingredient was calculated by dividing the insect repellent ingredient content after the test by the insect repellent ingredient content before the test, and the insect repellent ingredient content after the test was determined by quantitative analysis using gas chromatography. TIFF2025119520000003.tif12153The results are shown in Tables 3 and 4.

[0030] [Table 3]

[0031] [Table 4] [Industrial Applicability]

[0032] By applying the pest control composition of the present invention in advance to places where pests are likely to pass through or to objects where pests are likely to approach, it is possible to control pests for a long period of time.

Claims

1. A) Insect repellent ingredients and B) Alkyl acrylate copolymer methylpolysiloxane ester A pest control composition comprising:

2. The insect repellent component has a vapor pressure of 1.33 × 10 at 25 ° C. －３ 2. The pest control composition according to claim 1, which contains an insect repellent component having a viscosity of Pa or higher.

3. 3. The pest control composition according to claim 2, wherein the insect repellent component comprises at least one selected from the group consisting of N,N-diethyl-m-toluamide, 3-(N-n-butyl-N-acetyl)aminopropionic acid ethyl ester, 1-methylpropyl 2-(2-hydroxyethyl)-1-piperidinecarboxylate, and p-menthane-3,8-diol.

4. 4. The pest control composition according to claim 3, wherein the insect repellent component comprises N,N-diethyl-m-toluamide.

5. An insect control method comprising treating an object with the pest control composition according to any one of claims 1 to 4.

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