Pest repellent composition

Abstract

To provide a pest repellent composition that has an excellent repellent action on flying pests and the like in a sustained manner, is safe, suppresses a strong odor from a repellent flavor, and is suitable for application to skin.SOLUTION: This pest repellent composition contains components: (A) 13-99.95 mass% of at least one nonvolatile liquid oily component that has a surface tension of not more than 40 mN / m at 25°C, that has a viscosity of not more than 400 mPa s at 23°C when measured by using a B-type rotational viscometer, and that is selected from the group consisting of silicone oils, ester oils, ether oils, hydrocarbon oils, aliphatic alcohols, and polyhydric alcohols; and (B) 0.05-3.5 mass% of a predetermined flavor.SELECTED DRAWING: None

Description

[Technical Field]

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

[0002] Pests, such as flying insects such as mosquitoes and flies, transmit pathogens to humans and other animals, causing infectious diseases and dermatitis. In particular, some mosquitoes are extremely harmful insects from a hygienic standpoint because they transmit pathogens such as dengue fever, Zika fever, yellow fever, encephalitis, and malaria. Conventionally, methods of protecting oneself from such flying pests have been commonly used, such as spraying insecticides or applying repellents to the skin surface, with DEET (N,N-diethyltoluamide) being a typical repellent.

[0003] Pests such as mosquitoes possess chemical receptor systems, such as thermoreceptors that detect the body temperature of animals, olfactory receptors that detect volatile substances such as body odor, and carbon dioxide receptors that detect carbon dioxide, which they use to detect other animals. DEET repels these pests by modulating their chemical receptor systems and neutralizing their cognitive senses. However, DEET has an unpleasant odor, and a certain amount must be added to provide a long-lasting repellent effect. Furthermore, it is known to cause allergies and skin irritation in some people, limiting the amount and frequency of use for young children and people with sensitive skin.

[0004] Therefore, the use of natural essential oils as repellent ingredients has been investigated. Natural essential oils such as citronella oil, lemon eucalyptus oil, lemongrass oil, orange oil, and cassia oil are also used in candles and aroma lotions, and are highly safe for humans. However, their repellent effect against pests is insufficient, making their practicality questionable.

[0005] In addition, various proposals have been made so far regarding repellents and repellent compositions for pests. For example, Patent Document 1 describes the incorporation of an insect repellent such as DEET into a skin protective agent containing a fluorine-polyether co-modified silicone and an ultraviolet protection component. The use of fragrance ingredients as repellents has also been proposed, and Patent Document 2 discloses an insect repellent that utilizes the fact that fragrance ingredients such as octahydro-7-methyl-1,4-methanonaphthalen-6(2H)-one act on the thermoreceptors of blood-sucking insects to suppress their thermal response. Patent Document 3 discloses that fragrance ingredients such as 2-methoxy-4-propylphenol can be used to repel insects by suppressing their neural response to carbon dioxide stimulation. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 8-59447 [Patent Document 2] Japanese Patent Application Laid-Open No. 2016-172715 [Patent Document 3] Japanese Patent Application Laid-Open No. 2016-164153 Summary of the Invention [Problem to be solved by the invention]

[0007] Among pest repellents, those that are applied to the skin are desired to be safe and have little odor, and furthermore, to have not only an initial repellent effect but also an excellent durability of the repellent effect. However, the current situation is that the major pest repellents that are available do not fully meet these requirements. As mentioned above, existing pest repellents such as DEET described in Patent Document 1 have an unpleasant odor and are also problematic in terms of safety for the human body. Therefore, there is a demand for repellents that can be used more safely by young children and people with sensitive skin. In the repellents described in Patent Documents 2 and 3, which use compounds known as fragrance components, increasing the content of the fragrance component is expected to improve the duration of the repellent effect, but if the content of the fragrance component is too high, problems arise such as causing skin troubles or the odor derived from the fragrance component being too strong and making the product unsuitable for practical use. At present, no composition has been found that has an excellent and long-lasting pest repellent effect, is safe, suppresses the strong odor of the repellent component, and is suitable for application to the skin.

[0008] The present invention aims to provide a pest repellent composition that has an excellent and long-lasting repellent effect against pests, particularly flying pests, is safe, has a reduced strong odor derived from a repellent fragrance, and is suitable for application to the skin. [Means for solving the problem]

[0009] After extensive research, the present inventors have discovered that a non-volatile liquid oily component having a specific surface tension and viscosity has the effect of repelling pests such as mosquitoes. On the other hand, they have also found that a specific fragrance also has a repellent effect, but when attempting to maintain the repellent effect, the strong odor becomes a problem. Therefore, they have discovered that by adjusting the content of the fragrance to an amount that does not cause the odor to become a problem and combining it with a non-volatile liquid oily component having a specific surface tension and viscosity, the strong odor from the fragrance is suppressed while the repellent effect is surprisingly extended. In other words, they have discovered that a pest repellent composition containing a non-volatile liquid oily component having a specific surface tension and viscosity and a specific amount of a specific fragrance component can solve the above-mentioned problem. That is, the present invention provides the following [1] to [7]. [1] A pest repellent composition or a pest retention and suppression composition comprising the following components (A) and (B): (A) one or more non-volatile liquid oily components selected from the group consisting of silicone oils, ester oils, ether oils, hydrocarbon oils, aliphatic alcohols, and polyhydric alcohols, each having a surface tension of 40 mN / m or less at 25°C and a viscosity of 400 mPa·s or less at 23°C as measured by a B-type rotational viscometer: 13% by mass or more and 99.95% by mass or less (B) One or more fragrances selected from the group consisting of the following (B1) to (B9): 0.05% by mass or more and 3.5% by mass or less (B1) One or more lactones selected from the group consisting of octahydro-2H-1-benzopyran-2-one, gamma decalactone, delta decalactone, delta nonalactone, and gamma undecalactone (B2) 9-Ethylidene-3-oxatricyclo[6.2.1.0 2,7 ] one or more ketones selected from the group consisting of undecan-4-one, and octahydro-7-methyl-1,4-methanonaphthalen-6(2H)-one (B3) One or more aldehydes selected from the group consisting of 7-hydroxy-3,7-dimethyloctanal and octahydro-5-methoxy-4,7-methano-1H-indene-2-carboxaldehyde (B4) One or more aromatic alcohols selected from the group consisting of phenylethylmethylethylcarbinol, cinnamic alcohol, and eugenol (B5) 2-(4-methyl-2-thiazolyl)ethanol (B6) Ethyl 2-phenylacetate (B7) (3-pentyloxan-4-yl) acetate (B8) Phenylethyl dimethylcarbinyl acetate (B9) Methyl anthranilate [2] An oil-in-water mosquito repellent composition or mosquito retention and inhibition composition containing the following components (A) to (C), in which the content of pest repellents other than components (A) and (B) is 15 mass % or less: (A) one or more non-volatile liquid oily components selected from the group consisting of silicone oils, ester oils, ether oils, hydrocarbon oils, aliphatic alcohols, and polyhydric alcohols, each having a surface tension of 40 mN / m or less at 25°C and a viscosity of 400 mPa·s or less at 23°C as measured by a B-type rotational viscometer: 13% by mass or more and 50% by mass or less (B) One or more fragrances selected from the group consisting of the following (B1) to (B9): 0.05% by mass or more and 3.5% by mass or less (B1) One or more lactones selected from the group consisting of octahydro-2H-1-benzopyran-2-one, gamma decalactone, delta decalactone, delta nonalactone, and gamma undecalactone (B2) 9-Ethylidene-3-oxatricyclo[6.2.1.0 2,7 ] one or more ketones selected from the group consisting of undecan-4-one, and octahydro-7-methyl-1,4-methanonaphthalen-6(2H)-one (B3) One or more aldehydes selected from the group consisting of 7-hydroxy-3,7-dimethyloctanal and octahydro-5-methoxy-4,7-methano-1H-indene-2-carboxaldehyde (B4) One or more aromatic alcohols selected from the group consisting of phenylethylmethylethylcarbinol, cinnamic alcohol, and eugenol (B5) 2-(4-methyl-2-thiazolyl)ethanol (B6) Ethyl 2-phenylacetate (B7) (3-pentyloxan-4-yl) acetate (B8) Phenylethyl dimethylcarbinyl acetate (B9) Methyl anthranilate (C) Water: 35% by mass or more and 86.95% by mass or less [3] An oil-in-water mosquito repellent composition or mosquito retention and inhibition composition containing the following components (A) to (C), wherein the mass ratio of component (A) to component (B) [(A) / (B)] is 10 or more and 400 or less, and the content of pest repellents other than components (A) and (B) is 15 mass% or less. (A) one or more non-volatile liquid oily components selected from the group consisting of silicone oils, ester oils, ether oils, hydrocarbon oils, aliphatic alcohols, and polyhydric alcohols, each having a surface tension of 40 mN / m or less at 25°C and a viscosity of 400 mPa·s or less at 23°C as measured by a B-type rotational viscometer: 13% by mass or more and 50% by mass or less (B) One or more fragrances selected from the group consisting of the following (B1) to (B9): 0.05% by mass or more and 3.5% by mass or less (B1) One or more lactones selected from the group consisting of octahydro-2H-1-benzopyran-2-one, gamma decalactone, delta decalactone, delta nonalactone, and gamma undecalactone (B2) 9-Ethylidene-3-oxatricyclo[6.2.1.0 2,7 ] one or more ketones selected from the group consisting of undecan-4-one, and octahydro-7-methyl-1,4-methanonaphthalen-6(2H)-one (B3) One or more aldehydes selected from the group consisting of 7-hydroxy-3,7-dimethyloctanal and octahydro-5-methoxy-4,7-methano-1H-indene-2-carboxaldehyde (B4) One or more aromatic alcohols selected from the group consisting of phenylethylmethylethylcarbinol, cinnamic alcohol, and eugenol (B5) 2-(4-methyl-2-thiazolyl)ethanol (B6) Ethyl 2-phenylacetate (B7) (3-pentyloxan-4-yl) acetate (B8) Phenylethyl dimethylcarbinyl acetate (B9) Methyl anthranilate (C) Water: 35% by mass or more and 86.95% by mass or less [4] An oil-in-water mosquito repellent composition or mosquito retention and inhibition composition containing the following components (A) to (C), wherein the mass ratio of component (A) to component (B) [(A) / (B)] is 10 or more and 400 or less, and the content of pest repellents other than components (A) and (B) is 15 mass% or less. (A) one or more non-volatile liquid oily components selected from the group consisting of silicone oils, ester oils, ether oils, hydrocarbon oils, aliphatic alcohols, and polyhydric alcohols, each having a surface tension of 40 mN / m or less at 25°C and a viscosity of 400 mPa·s or less at 23°C as measured by a B-type rotational viscometer: 13% by mass or more and 50% by mass or less (B) one or more fragrances selected from octahydro-2H-1-benzopyran-2-one and 7-hydroxy-3,7-dimethyloctanal: 0.05% by mass or more and 3.5% by mass or less (C) Water: 35% by mass or more and 86.95% by mass or less [5] An oil-in-water mosquito repellent composition or mosquito retention and inhibition composition containing the following components (A) to (D), wherein the mass ratio of component (A) to component (B) [(A) / (B)] is 10 or more and 400 or less, and the content of pest repellents other than components (A) and (B) is 15 mass% or less. (A) one or more non-volatile liquid oily components selected from the group consisting of silicone oils, ester oils, and hydrocarbon oils, each having a surface tension of 40 mN / m or less at 25°C and a viscosity of 400 mPa·s or less at 23°C as measured by a B-type rotational viscometer: 13% by mass or more and 50% by mass or less (B) one or more fragrances selected from octahydro-2H-1-benzopyran-2-one and 7-hydroxy-3,7-dimethyloctanal: 0.05% by mass or more and 3.5% by mass or less (C) Water: 35% by mass or more and 86.95% by mass or less (D) Thickener: 0.05% by mass or more and 3% by mass or less [6] A method for repelling pests, comprising applying any one of the compositions set forth in [1] to [5] to the surface of human skin. [7] A method for inhibiting pest retention, which comprises attaching the composition according to any one of [1] to [5] to the legs of a pest to prevent the pest from retaining on human skin. [Effects of the Invention]

[0010] According to the present invention, it is possible to provide a pest repellent composition, a pest retention and inhibition composition, a pest repellent method, and a pest retention and inhibition method that have an excellent and long-lasting repellent effect against pests, particularly flying pests, are safe, suppress the strong odor derived from repellent fragrances, and are suitable for application to the skin. DETAILED DESCRIPTION OF THE INVENTION

[0011] [Pest repellent composition, pest retention and suppression composition] The pest repellent composition and pest retention / inhibition composition of the present invention (hereinafter, these may be collectively referred to as "the composition of the present invention") are compositions containing the following components (A) and (B). (A) one or more non-volatile liquid oily components selected from the group consisting of silicone oils, ester oils, ether oils, hydrocarbon oils, aliphatic alcohols, and polyhydric alcohols, each having a surface tension of 40 mN / m or less at 25°C and a viscosity of 400 mPa·s or less at 23°C as measured by a B-type rotational viscometer: 13% by mass or more and 99.95% by mass or less (B) One or more fragrances selected from the group consisting of the following (B1) to (B9): 0.05% by mass or more and 3.5% by mass or less (B1) One or more lactones selected from the group consisting of octahydro-2H-1-benzopyran-2-one, gamma decalactone, delta decalactone, delta nonalactone, and gamma undecalactone (B2) 9-Ethylidene-3-oxatricyclo[6.2.1.0 2,7 ] one or more ketones selected from the group consisting of undecan-4-one, and octahydro-7-methyl-1,4-methanonaphthalen-6(2H)-one (B3) One or more aldehydes selected from the group consisting of 7-hydroxy-3,7-dimethyloctanal and octahydro-5-methoxy-4,7-methano-1H-indene-2-carboxaldehyde (B4) One or more aromatic alcohols selected from the group consisting of phenylethylmethylethylcarbinol, cinnamic alcohol, and eugenol (B5) 2-(4-methyl-2-thiazolyl)ethanol (B6) Ethyl 2-phenylacetate (B7) (3-pentyloxan-4-yl) acetate (B8) Phenylethyl dimethylcarbinyl acetate (B9) Methyl anthranilate The above compounds (B1) to (B9) defined as component (B) are known as fragrances, and as an example, they are all disclosed as fragrances in Genichi Indo, "Synthetic Fragrances: Chemistry and Product Knowledge (Expanded and Revised Edition)," published by The Chemical Daily in 2005 (ISBN 4-87326-460-X).

[0012] The composition of the present invention is a pest repellent composition and pest retention / control composition that contains specific amounts of component (A) and component (B), has an excellent long-lasting repellent effect against pests, particularly flying pests, has little strong odor derived from the repellent fragrance, and is suitable for application to the skin. The composition of the present invention contains a specific amount of component (B) described below in addition to component (A), and it is believed that by applying component (B) to the legs of flying pests together with component (A), it is possible to achieve an excellent long-lasting repellent effect while reducing the strong odor derived from component (B).

[0013] In the present invention, "repellent effect against pests" means that even if pests come into contact with an object, they do not remain but immediately move away, and the composition of the present invention corresponds to a contact repellent composition. In other words, the pest repellent effect in the present invention is different from that of repellents or insecticides that repel pests without contact with the object, such as those that keep pests away from the object or those that prevent pests from approaching the object, and insecticides that have insecticidal activity against pests and exterminate them. The compositions of the present invention have the effect of repelling pests, such as mosquitoes, by preventing them from remaining on the surface and immediately leaving it, even when they land on an object to which they are applied or attached. Specifically, they have a retention-inhibiting effect in that they prevent pests, such as mosquitoes, from remaining in a specific area on the skin surface for a time sufficient for their stingers to penetrate, specifically, for at least one second, after landing on the skin of an animal or human. This effect is based on a novel pest-repelling principle, and is safe, with no side effects such as rough skin. Therefore, the compositions of the present invention can be used as pest retention-inhibiting compositions. In the present invention, the term "long-lasting repellent effect against pests" means that the repellent effect persists even after the application of the composition of the present invention to an object. In the following description, the long-lasting repellent effect of the present invention, particularly against flying pests, will be simply referred to as the "long-lasting repellent effect."

[0014] The composition of the present invention contains, as component (A), one or more non-volatile liquid oily components selected from the group consisting of (a) silicone oil, (b) ester oil, (c) ether oil, (d) hydrocarbon oil, (e) aliphatic alcohol, and (f) polyhydric alcohol, each of which has a surface tension of 40 mN / m or less at 25°C and a viscosity of 400 mPa·s or less at 23°C as measured by a Brookfield rotational viscometer. The inclusion of component (A) provides an excellent and sustained repellent effect against pests, particularly flying pests. The reason for this is unclear, but is thought to be as follows. The present inventors have discovered that flying pests such as mosquitoes have a tendency to avoid landing on surfaces where their legs become wet in order to avoid the attractive force generated from the landing surface. Because the legs of flying pests such as mosquitoes are hydrophobic, a liquid oily ingredient with a surface tension of 40 mN / m or less at 25°C has a high affinity for the legs of flying pests. Furthermore, a liquid oily ingredient with a viscosity of 400 mPa·s or less ensures a sufficiently large contact area between the legs of the flying pests and the liquid oily ingredient in a short period of time when the legs of the flying pests come into contact with the liquid oily ingredient. Therefore, when flying pests land on a surface coated or attached with component (A), their legs become wet, and it is believed that they avoid the attractive force generated from the landing surface and fly away without landing at the landing point. In the present invention, landing refers to a flying pest such as a mosquito coming into contact with a target object for less than one second, while stationary refers to a flying pest such as a mosquito remaining in contact with a target object for one second or more.

[0015] Furthermore, the composition of the present invention contains, in addition to component (A), a specific amount of component (B) described below. By applying component (B) to the legs of flying pests together with component (A), it is believed that it has been possible to achieve an excellent, long-lasting repellent effect while reducing the strong odor derived from component (B).

[0016] <Component (A): Non-volatile liquid oily component> Component (A) contained in the composition of the present invention is one or more non-volatile liquid oily components selected from the group consisting of (a) silicone oil, (b) ester oil, (c) ether oil, (d) hydrocarbon oil, (e) aliphatic alcohol, and (f) polyhydric alcohol, each of which has a surface tension of 40 mN / m or less at 25°C and a viscosity of 400 mPa·s or less at 23°C as measured by a Brookfield rotational viscometer. By combining component (B), described below, with component (A) in addition to component (A), the composition of the present invention suppresses the base odor of component (A), prevents excessive volatilization of component (B), and allows component (B) to be applied to the legs of flying pests together with component (A), thereby achieving an excellent duration of repellency.

[0017] From the viewpoints of facilitating application to the skin and improving the duration of the repellent effect, component (A) is preferably a non-volatile oil that is liquid at 20°C, more preferably at 15°C, and even more preferably at 10°C. The term "liquid" in liquid oily ingredients refers to ingredients that are determined to be liquid in the liquid-solid determination test according to the American Society for Testing and Materials standard "ASTM D 4359-90: Standard Test Method for Determining Whether a Material is a Liquid or Solid." From the viewpoint of improving the sustained repellent effect against pests, component (A) is preferably a water-insoluble or poorly water-soluble component, and specifically, the amount of solubility in 100 g of water at 20°C is preferably 1 g or less, more preferably 0.5 g or less, even more preferably 0.1 g or less, and even more preferably substantially 0 g.

[0018] The liquid oil component of component (A) used in the present invention is a non-volatile liquid oil component from the viewpoint of improving the repellent effect. Here, the non-volatile liquid oil component in the present invention refers to a component whose volatility after drying at 25°C for 60 minutes under 1 atmosphere is 50% or less, and preferably a component whose volatility after drying at 25°C for 120 minutes under 1 atmosphere is 50% or less. The volatility is evaluated according to the German test standard DIN53249, and specifically, is carried out by the following steps 1 to 4. 1. Measure the weight (P(g)) of a round filter paper with a diameter of 150 mm. 2. Using a pipette, drop 0.3 g of a sample of component (A) onto a round filter paper, and immediately measure the weight of the filter paper (W0 (g)). 3. In a ventilated environment, measure the weight of the filter paper at 25°C, every 5 minutes, using a gravimetric measurement with an accuracy of approximately 0.001 g. After measuring 2, the weight of the filter paper measured 60 minutes later is W 60 (g). 4. Calculation formula {((W0-P)-(W 60 The value obtained by {(W0-P)) / (W0-P)} × 100 is the volatility rate (%). The lower the volatility rate, the longer the liquid oily component will remain on the skin when applied, resulting in a longer-lasting repellent effect. When two or more liquid oily components are used, the volatility of the non-volatile liquid oily component means the volatility of the mixture of two or more liquid oily components. Therefore, as long as the volatility of the mixture falls within the above range, liquid oily components having a volatility of more than 50% after drying at 25°C for 60 minutes under 1 atmosphere may be used in combination.

[0019] From the viewpoint of availability, the surface tension of component (A) at 25°C is preferably 15 mN / m or more, more preferably 17 mN / m or more, and from the viewpoint of improving the sustained repellent effect, it is 40 mN / m or less, preferably 30 mN / m or less, more preferably 28 mN / m or less, even more preferably 25 mN / m or less, still more preferably 23 mN / m or less, and even more preferably 21 mN / m or less. Furthermore, even if the surface tension of a component (A) itself exceeds 40 mN / m at 25°C, it will exhibit a sustained repellent effect if the surface tension is lowered by mixing it with another liquid oily component. The viscosity of component (A) at 23°C as measured with a B-type rotational viscometer is preferably 1 mPa·s or more from the viewpoint of suppressing volatility and improving the duration of repellency, and from the viewpoint of improving the duration of repellency, is 400 mPa·s or less, preferably 300 mPa·s or less, more preferably 210 mPa·s or less, even more preferably 100 mPa·s or less, still more preferably 60 mPa·s or less, still more preferably 40 mPa·s or less, and even more preferably 30 mPa·s or less. When two or more liquid oily components with different viscosities are used, the viscosity refers to the viscosity of the mixture of these liquid oily components. The surface tension and viscosity of component (A) are measured by the method described in the examples.

[0020] (a) Silicone oil As the silicone oil, from the viewpoint of improving the durability of the repellent effect, one or more types selected from the group consisting of dimethylpolysiloxane, dimethiconol (dimethylpolysiloxane having a hydroxy group at the terminal), methylphenylpolysiloxane, and modified silicone are preferred. Examples of modified silicones include amino-modified silicones (dimethylpolysiloxanes having amino groups), polyether-modified silicones, glyceryl-modified silicones, amino derivative silicones, carboxy-modified silicones, fatty acid-modified silicones, alcohol-modified silicones, aliphatic alcohol-modified silicones, epoxy-modified silicones, fluorine-modified silicones, and alkyl-modified silicones.

[0021] Among the silicone oils, from the viewpoint of improving the repellent effect, one or more selected from the group consisting of dimethylpolysiloxane, dimethiconol, methylphenylpolysiloxane, and modified silicone are preferred, one or more selected from the group consisting of dimethylpolysiloxane, dimethiconol, and polyether-modified silicone are more preferred, and dimethylpolysiloxane is even more preferred.

[0022] The dimethylpolysiloxane may be at least one selected from the group consisting of linear dimethylpolysiloxane and cyclic dimethylpolysiloxane, of which linear dimethylpolysiloxane is more preferred from the viewpoint of improving the durability of the repellent effect. Commercially available examples of linear dimethylpolysiloxanes include the KF-96 series from Shin-Etsu Chemical Co., Ltd., the SH200C series from Dow Corning Toray Co., Ltd., "2-1184 Fluid," and "Silsoft DML," "Element14 PDMS 5-JC," "Element14 PDMS 10-JC," and "Element14 PDMS 20-JC" from Momentive Performance Materials.

[0023] (b) Ester oil As the ester oil, from the viewpoint of improving the repellent durability, an ester oil represented by any one of the following general formulas (1) to (3) and a dialkyl carbonate compound represented by the following general formula (4) are preferred.

[0024] R 1 -COO-R 2 (1) In general formula (1), R 1 represents a linear or branched alkyl group having 7 to 23 carbon atoms, or an aromatic hydrocarbon group having 6 to 24 carbon atoms, which may be substituted with a hydroxyl group; R 2 represents a linear or branched alkyl or alkenyl group having 1 to 22 carbon atoms. R 1When R is an alkyl group, the number of carbon atoms is preferably 7 or more, more preferably 9 or more, from the viewpoint of improving the repellent effect and, from the viewpoint of improving the feel when applied to the skin, it is preferably 21 or less, more preferably 17 or less. 1 When is an aromatic hydrocarbon group, the number of carbon atoms is preferably 8 or more, more preferably 10 or more, from the viewpoint of improving the sustained repellent effect, and is preferably 22 or less, more preferably 20 or less, from the viewpoint of providing a good feel when applied to the skin. R 2 From the viewpoint of providing a good feel when applied to the skin, R is preferably a linear or branched alkyl or alkenyl group having 20 or less carbon atoms, more preferably 18 or less carbon atoms. 1 or R 2 At least one of them is preferably a branched alkyl group.

[0025] Examples of the ester oil represented by general formula (1) include myristyl 2-ethylhexanoate, cetyl 2-ethylhexanoate, stearyl 2-ethylhexanoate, isodecyl octanoate, isocetyl octanoate, isononyl isononanoate, isotridecyl isononanoate, cetearyl isononanoate, octyl propylheptanoate, methyl laurate, isopropyl myristate, octyldodecyl myristate, isopropyl palmitate, 2-ethylhexyl palmitate, isocetyl palmitate, stearyl 2-ethylhexyl hydroxystearate, isocetyl stearate, isotridecyl stearate, isopropyl isostearate, octyl isostearate, isocetyl isostearate, isostearyl isostearate, 2-ethylhexyl hydroxystearate, methyl oleate, oleyl oleate, isobutyl oleate, oleyl erucate, alkyl benzoate (alkyl having 12 to 15 carbon atoms), and diethylhexyl naphthalenedicarboxylate.

[0026] (R 3 O)-CHCH(OR 4 )-CH2(OR5 ) (2) In general formula (2), R 3 , R 4 and R 5 are each independently a hydrogen atom or a group represented by the following general formula (2-1), but not all of them are hydrogen atoms. -CO-R 6 (2-1) (In the formula, R 6 represents an alkyl or alkenyl group having 7 to 23 carbon atoms, preferably 17 or less, which may be substituted with a hydroxyl group. Examples of the ester oil represented by general formula (2) include one or more selected from the group consisting of glyceryl tri-2-ethylhexanoate and glyceryl tricaprylate. Plant-derived ester oils such as jojoba oil, olive oil, sunflower oil, soybean oil, peanut oil, rapeseed oil, almond oil, palm oil, coconut oil, castor oil, wheat germ oil, grape seed oil, thistle oil, evening primrose oil, macadamia nut oil, corn germ oil, and avocado oil may also be used.

[0027] R 7 O-(AO)m-COR 8 (3) In general formula (3), R 7 represents an aromatic hydrocarbon group having 6 to 20 carbon atoms, and R 8 represents an alkyl or alkenyl group having 1 to 23 carbon atoms, AO represents an alkyleneoxy group having 2 to 4 carbon atoms, and m represents the average number of moles added of 1 to 50. R 7 is preferably an aromatic hydrocarbon group having 12 or less carbon atoms, more preferably 10 or less carbon atoms, more preferably a benzyl group, from the viewpoint of improving the sustained repellent effect, and from the viewpoint of providing a pleasant feel when applied to the skin. R 8 is an alkyl group having preferably 7 or more carbon atoms, more preferably 11 or more carbon atoms, from the viewpoint of improving the sustained repellent effect, and preferably 21 or less carbon atoms, more preferably 15 or less carbon atoms, from the viewpoint of providing a pleasant feel when applied to the skin. From the viewpoint of improving the duration of the repellent effect, the AO group is preferably a propyleneoxy group, and from the viewpoint of improving the duration of the repellent effect and achieving a good feel when applied to the skin, m is preferably 1 or more and 10 or less, more preferably 1 or more and 5 or less. Examples of the ester oil represented by general formula (3) include one or more selected from the group consisting of an ester of a 3-mol propylene oxide adduct of benzyl alcohol and myristic acid ("Croda" Crodamol STS), and an ester of a 3-mol propylene oxide adduct of benzyl alcohol and 2-ethylhexanoic acid ("Croda" Crodamol SFX).

[0028] R 9 -O-(CH2CH2O)v-CO-(OCH2CH2)w-OR 10 (4) In general formula (4), R 9 and R 10 each independently represents an alkyl group or alkenyl group having 6 to 22 carbon atoms, and v and w each independently represent 0 or the average number of moles added of 1 to 50. R 9 and R 10 is preferably an alkyl group having 8 or more carbon atoms from the viewpoint of improving the sustained repellent effect, and is preferably an alkyl group having 18 or less carbon atoms, more preferably 12 or less carbon atoms, from the viewpoint of providing a good feel when applied to the skin. From the viewpoint of providing a good feel when applied to the skin, v and w are preferably 0 or a number between 1 and 5, and more preferably 0. Examples of the dialkyl carbonate compound represented by the general formula (4) include dioctyl carbonate ("Cetiol CC" manufactured by Cognis).

[0029] Examples of ester oils other than those mentioned above include esters of polycarboxylic acids and alcohols, and esters of polyhydric alcohols other than glycerin and fatty acids. Specific examples thereof include one or more selected from the group consisting of diisopropyl dimerate, diisopropyl adipate, diethoxyethyl succinate, 2-ethylhexyl succinate, propanediol dicaprate, neopentyl glycol dicaprate, neopentyl glycol di-2-ethylhexanoate, etc. Among these, from the viewpoint of improving the durability of the repellent effect, esters of neopentyl glycol and fatty acids are preferred, and one or more selected from the group consisting of neopentyl glycol dicaprate and neopentyl glycol di-2-ethylhexanoate are more preferred. Among the above (b) ester oils, one or more selected from the group consisting of ester oils represented by general formula (1) and esters of neopentyl glycol and fatty acids are preferred.

[0030] (c) Ether oil As the ether oil, from the viewpoint of improving the repellent effect, a dialkyl ether compound represented by the following general formula (5) or a polyoxyalkylene alkyl ether compound represented by the following general formula (6) is preferred.

[0031] R 11 -OR 12 (5) In general formula (5), R 11 and R 12 each independently represents a linear or branched alkyl or alkenyl group having 6 to 22 carbon atoms, or an aromatic hydrocarbon group having 6 to 24 carbon atoms. R 11 and R 12 is preferably an alkyl group from the viewpoint of improving the duration of the repellent effect, and the number of carbon atoms therein is preferably 8 or more from the viewpoint of improving the duration of the repellent effect, and is preferably 18 or less, more preferably 16 or less, and even more preferably 12 or less from the viewpoint of improving the feel when applied to the skin. Examples of the dialkyl ether compound represented by general formula (5) include dihexyl ether, dioctyl ether ("Cetiol OE" manufactured by Cognis), dicaprylyl ether, and cetyl-1,3-dimethylbutyl ether ("ASE-166K" manufactured by Kao Corporation).

[0032] R 13 -O-(PO)r(EO)sH (6) In general formula (6), R 13 represents an alkyl or alkenyl group having 6 to 22 carbon atoms, PO represents a propyleneoxy group, and EO represents an ethyleneoxy group. r represents the average number of moles added of 0.1 to 15, and s represents the average number of moles added of 0 to 10. When s is not 0, the addition of PO and EO may be random or block. R 13 The number of carbon atoms is preferably 8 or more from the viewpoint of improving the sustained repellent effect, and is preferably 20 or less, more preferably 18 or less, and even more preferably 12 or less from the viewpoint of providing a good feel when applied to the skin. The average number of added moles r is preferably 1 or more, more preferably 2 or more, and even more preferably 3 or more, from the viewpoint of improving the sustained repellent effect, and is preferably 13 or less, more preferably 10 or less, from the viewpoint of improving the feel when applied to the skin, and the average number of added moles s is preferably 5 or less, more preferably 1 or less, and even more preferably 0, from the viewpoint of improving the feel when applied to the skin. The polyoxyalkylene alkyl ether compound represented by general formula (6) is preferably at least one selected from the group consisting of polypropylene glycol, polyoxypropylene octyl ether, polyoxypropylene decyl ether, and polyoxypropylene lauryl ether, each of which has an average molar number r of propyleneoxy groups added of 3 or more and 10 or less. Among the above (c) ether oils, the ether oil represented by the general formula (5) is preferred from the viewpoint of improving the durability of the repellent effect.

[0033] (d) Hydrocarbon oil Examples of hydrocarbon oils include liquid paraffin, liquid isoparaffin, squalane, isohexadecane, isoeicosane, hydrogenated polyisobutene, light liquid isoparaffin, heavy liquid isoparaffin, α-olefin oligomers, and cycloparaffins. Among these, one or more selected from the group consisting of liquid paraffin, liquid isoparaffin, and squalane are preferred from the viewpoint of improving the durability of the repellent effect and improving the feel when applied to the skin.

[0034] (e) Fatty alcohol The aliphatic alcohol may be a monohydric chain or cyclic aliphatic alcohol, with a monohydric chain aliphatic alcohol being preferred. The carbon number of the aliphatic alcohol is preferably 14 or more, more preferably 18 or more, from the viewpoint of improving the sustained repellent effect, and is preferably 28 or less, more preferably 24 or less, and even more preferably 22 or less, from the viewpoint of improving the feel when applied to the skin. The aliphatic alcohol may be either straight-chain or branched, and may be either saturated or unsaturated. However, from the viewpoint of improving the duration of the repellent effect and improving the feel when applied to the skin, branched-chain aliphatic saturated alcohols are preferred. Examples of the straight chain aliphatic alcohol include oleyl alcohol, and examples of the branched chain aliphatic saturated alcohol include butyl octanol, butyl decanol, hexyl decanol, and octyldodecanol. Among these, from the viewpoint of improving the duration of the repellent effect and improving the feel when applied to the skin, branched-chain aliphatic saturated alcohols are preferred, and one or more selected from the group consisting of hexyldecanol, hexyldodecanol, and octyldodecanol are preferred.

[0035] (f) Polyhydric alcohol Examples of polyhydric alcohols include aliphatic alcohols having 2 or more carbon atoms, aromatic alcohols, and sugar alcohols having 4 or more carbon atoms, and they may be either saturated or unsaturated. From the viewpoint of providing a good feel when applied to the skin, however, one or more selected from the group consisting of aliphatic alcohols having 2 to 10 carbon atoms, aromatic alcohols, and sugar alcohols having 4 to 10 carbon atoms are preferred. Among polyhydric alcohols, examples of aliphatic alcohols having two or more carbon atoms include dihydric alcohols such as ethylene glycol, propylene glycol, 1,2-butylene glycol, 1,3-butylene glycol, 1,2-pentanediol, 1,2-hexanediol, diethylene glycol, dipropylene glycol, and hexylene glycol. Examples of the sugar alcohol include sorbitol, erythritol, pentaerythritol, xylitol, and mannitol.

[0036] Among the liquid oily components, from the viewpoint of improving the repellent effect, one or more selected from the group consisting of (a) silicone oil, (b) ester oil, (c) ether oil, and (d) hydrocarbon oil are preferred, one or more selected from the group consisting of (a) silicone oil, (b) ester oil, and (d) hydrocarbon oil are more preferred, one or more selected from the group consisting of (a) silicone oil and (b) ester oil are even more preferred, and (a) silicone oil is even more preferred. Among the (a) silicone oils, one or more selected from the group consisting of dimethylpolysiloxane, dimethiconol, methylphenylpolysiloxane, and modified silicone are preferred, one or more selected from the group consisting of dimethylpolysiloxane, dimethiconol, and polyether-modified silicone are more preferred, dimethylpolysiloxane is even more preferred, and linear dimethylpolysiloxane is even more preferred.

[0037] (Content of component (A)) The content of component (A) in the composition of the present invention is 13% by mass or more, preferably 20% by mass or more, and more preferably 25% by mass or more, from the viewpoint of improving the repellent duration effect, ensuring the long-term storage stability of the composition, suppressing the odor derived from component (A), and improving the feel when using the composition, 99.95% by mass or less, preferably 80% by mass or less, more preferably 50% by mass or less, even more preferably 40% by mass or less, and still more preferably 35% by mass or less. The content of component (A) in the composition of the present invention is 13 to 99.95% by mass, preferably 13 to 80% by mass, more preferably 13 to 50% by mass, even more preferably 20 to 40% by mass, and still more preferably 25 to 35% by mass.

[0038] <Ingredient (B): Fragrance> The composition of the present invention contains, as component (B), one or more fragrances selected from the group consisting of the following (B1) to (B9): (B1) One or more lactones selected from the group consisting of octahydro-2H-1-benzopyran-2-one, gamma decalactone, delta decalactone, delta nonalactone, and gamma undecalactone (B2) 9-Ethylidene-3-oxatricyclo[6.2.1.0 2,7 ] one or more ketones selected from the group consisting of undecan-4-one, and octahydro-7-methyl-1,4-methanonaphthalen-6(2H)-one (B3) One or more aldehydes selected from the group consisting of 7-hydroxy-3,7-dimethyloctanal and octahydro-5-methoxy-4,7-methano-1H-indene-2-carboxaldehyde (B4) One or more aromatic alcohols selected from the group consisting of phenylethylmethylethylcarbinol, cinnamic alcohol, and eugenol (B5) 2-(4-methyl-2-thiazolyl)ethanol (B6) Ethyl 2-phenylacetate (B7) (3-pentyloxan-4-yl) acetate (B8) Phenylethyl dimethylcarbinyl acetate (B9) Methyl anthranilate The fragrance of component (B) is thought to act on the chemical receptor system of flying pests such as mosquitoes, thereby providing a repellent effect. By using component (A) and component (B) in combination, the sustained pest repellent effect is synergistically improved compared to when component (A) or component (B) is used alone.

[0039] Octahydro-2H-1-benzopyran-2-one is also known as "octahydrocoumarin." 7-Hydroxy-3,7-dimethyloctanal is also known as "hydroxycitronellal," octahydro-5-methoxy-4,7-methano-1H-indene-2-carboxaldehyde is also known as "centenal," 2-(4-methyl-2-thiazolyl)ethanol is also known as "sulfurol," and (3-pentyloxan-4-yl)acetate is also known as "jasmonyl."

[0040] Component (B) can be used alone or in combination of two or more. Among component (B), octahydro-2H-1-benzopyran-2-one, gamma decalactone, gamma undecalactone, 9-ethylidene-3-oxatricyclo[6.2.1.0], and the like can be used in order to suppress strong odors and improve the repellent effect. 2,7 ]undecan-4-one, octahydro-7-methyl-1,4-methanonaphthalen-6(2H)-one, 7-hydroxy-3,7-dimethyloctanal, octahydro-5-methoxy-4,7-methano-1H-indene-2-carboxaldehyde, phenylethylmethylethylcarbinol, eugenol, 2-(4-methyl-2-thiazolyl)ethanol, (3-pentyloxan-4-yl)acetate, and methyl anthranilate are preferred, and at least one selected from the group consisting of octahydro-2H-1-benzopyran-2-one, gamma undecalactone, 9-ethylidene-3-oxatricyclo[6.2.1.0 2,7]undecan-4-one, and (3-pentyloxan-4-yl)acetate are more preferred, and one or more selected from the group consisting of octahydro-2H-1-benzopyran-2-one and 7-hydroxy-3,7-dimethyloctanal are even more preferred, with octahydro-2H-1-benzopyran-2-one being even more preferred.

[0041] (Content of component (B)) The content of component (B) in the composition of the present invention is 0.05% by mass or more, preferably 0.1% by mass or more, more preferably 0.2% by mass or more, and even more preferably 0.3% by mass or more, from the viewpoint of suppressing the odor derived from component (A) and improving the repellent duration. The content of component (B) in the composition of the present invention is 3.5% by mass or less, preferably 2.5% by mass or less, more preferably 2.0% by mass or less, even more preferably 1.0% by mass or less, and even more preferably 0.7% by mass or less, from the viewpoint of suppressing the strong odor derived from component (B). The content of component (B) in the composition of the present invention is 0.05 to 3.5% by mass, preferably 0.1 to 2.5% by mass, more preferably 0.2 to 2.0% by mass, even more preferably 0.2 to 1.0% by mass, and even more preferably 0.3 to 0.7% by mass.

[0042] In the composition of the present invention, the mass ratio of component (A) to component (B) [(A) / (B)] is preferably 10 or more, more preferably 15 or more, even more preferably 30 or more, and still more preferably 40 or more, from the viewpoint of suppressing odor and ensuring long-term storage stability of the composition, and is preferably 400 or less, more preferably 300 or less, even more preferably 150 or less, still more preferably 120 or less, still more preferably 100 or less, and still more preferably 70 or less, from the viewpoint of improving the sustained pest repellent effect. The mass ratio of component (A) to component (B) [(A) / (B)] is preferably 10 to 400, more preferably 15 to 300, even more preferably 15 to 150, still more preferably 15 to 150, still more preferably 15 to 120, still more preferably 15 to 100, still more preferably 30 to 100, and still more preferably 40 to 70.

[0043] <Ingredient (C): Water> The composition of the present invention preferably contains water as component (C) from the viewpoint of improving the repellent duration and providing a composition with a good feel when used. The content of component (C) in the composition of the present invention is preferably 5% by mass or more, more preferably 10% by mass or more, even more preferably 35% by mass or more, and even more preferably 50% by mass or more, from the viewpoint of improving the repellent duration and providing a composition with a good feel when used. Furthermore, from the viewpoint of improving the repellent duration, the content is preferably 86.95% by mass or less, more preferably 85% by mass or less, even more preferably 80% by mass or less, and even more preferably 75% by mass or less. The content of component (C) in the composition of the present invention is preferably 5 to 86.95% by mass or less, more preferably 5 to 85% by mass, even more preferably 10 to 80% by mass, even more preferably 35 to 75% by mass, and even more preferably 50 to 75% by mass.

[0044] The present invention can be applied to various composition forms, such as non-aqueous compositions containing no water, water-in-oil compositions, and oil-in-water compositions. However, from the viewpoint of suppressing the odor derived from component (A), an oil-in-water composition is preferred. When an oil-in-water composition is used, the content of component (C) in the composition is preferably 35% by mass or more, more preferably 40% by mass or more, and even more preferably 50% by mass or more, from the viewpoint of suppressing the odor derived from component (A) and ensuring the long-term storage stability of the composition. Furthermore, from the viewpoint of improving the sustained repellent effect, the content is preferably 86.95% by mass or less, more preferably 80% by mass or less, and even more preferably 75% by mass or less. Furthermore, from the viewpoint of improving the duration of the repellent effect, it is preferable to use a water-in-oil composition. When a water-in-oil composition is used, the content of component (C) in the composition is preferably 5% by mass or more, more preferably 10% by mass or more, and even more preferably 15% by mass or more, from the viewpoint of improving the feel when applied to the skin. Furthermore, from the viewpoint of improving the duration of the repellent effect, it is preferably 40% by mass or less, more preferably 30% by mass or less, and even more preferably 25% by mass or less.

[0045] When the composition of the present invention contains component (C), the mass ratio of component (A) to water [(A) / (C)] is preferably 0.05 or more, more preferably 0.1 or more, even more preferably 0.15 or more, and still more preferably 0.3 or more, from the viewpoint of improving the sustained repellent effect, and is preferably 10 or less, more preferably 3 or less, even more preferably 1 or less, and still more preferably 0.7 or less, from the viewpoint of ensuring the long-term storage stability of the composition and providing a composition that is easy to use.

[0046] <Component (D): Thickener> The composition of the present invention may further contain a thickener as component (D). From the viewpoint of improving the duration of repellency by adjusting the fluidity after application to the skin, ensuring excellent application properties to the skin by favorably dispersing or dissolving each component, and ensuring long-term storage stability of the composition, it is preferable that the thickener has a moderate emulsifying ability (i.e., surfactant ability). In the present invention, an agent having emulsifying ability and thickening effect is referred to as a thickener. Component (D) includes water-soluble cationic polymers, anionic polymers, nonionic polymers, and amphoteric or dipolar polymers.

[0047] Specific examples of cationic polymers include hydroxyethyl cellulose with chloride O-[2-hydroxy-3-(trimethylammonio)propyl] groups (polyquaternium-10), vinylpyrrolidone-dimethylaminomethylethyl methacrylate copolymer diethyl sulfate (polyquaternium-11), and methylvinylimidazolium chloride-vinylpyrrolidone copolymer.

[0048] Specific examples of anionic polymers include carboxyvinyl polymer, carboxymethylcellulose, carrageenan, xanthan gum, polystyrene sulfonate, agar, ghatti gum, karaya gum, pectin, alginate salts, acrylic acid / alkyl methacrylate copolymer, (sodium acrylate / sodium acryloyldimethyltaurate) copolymer, polyacrylamide, (ammonium acryloyldimethyltaurate / vinylpyrrolidone) copolymer, (acrylates / C10-C30 alkyl acrylate) crosspolymer, (ammonium acryloyldimethyltaurate / beheneth-25 methacrylate) crosspolymer, (hydroxyethyl acrylate / sodium acryloyldimethyltaurate) copolymer, (acrylamide / ammonium acrylate) copolymer, (sodium acrylate / acryloyldimethyltaurate / dimethylacrylamide) crosspolymer, polyacrylate-13, polyacrylate crosspolymer-6, alkali metal salts of poly(acrylic acid), and hyaluronic acid or its alkali metal salts.

[0049] Specific examples of nonionic polymers include cellulose ethers (hydroxybutyl methyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, ethyl hydroxyethyl cellulose, hydroxyethyl cellulose, etc.), propylene glycol alginate, poly(ethylene oxide), polyvinyl alcohol, polyvinylpyrrolidone, hydroxypropyl guar gum, locust bean gum, amylose, hydroxyethyl amylose, starch, starch derivatives, and mixtures thereof.

[0050] Specific examples of amphoteric or dipolar polymers include octylacrylamide / acrylate / butylaminoethyl methacrylate copolymer, polyquaternium-47, polyquaternium-43, and the like.

[0051] The component (D) can be used alone or in combination of two or more. From the viewpoints of improving the durability of the pest repellent effect by adjusting the fluidity after application to the skin, ensuring excellent application to the skin by well dispersing or dissolving each component, and ensuring long-term storage stability of the composition, component (D) is preferably one or more selected from the group consisting of anionic polymers and nonionic polymers, and is preferably one or more selected from the group consisting of carboxyvinyl polymers, acrylic acid / alkyl methacrylate copolymers, (sodium acrylate / sodium acryloyldimethyltaurate) copolymers, (acrylates / C10-C30 alkyl acrylate) crosspolymers, (ammonium acryloyldimethyltaurate / beheneth-25 methacrylate) crosspolymers, and cellulose ethers, and more preferably one or more selected from the group consisting of (sodium acrylate / sodium acryloyldimethyltaurate) copolymers, (acrylates / C10-C30 alkyl acrylate) crosspolymers, and (ammonium acryloyldimethyltaurate / beheneth-25 methacrylate) crosspolymers. Commercially available products of component (D) include, for example, Lubrizol Advanced Materials' "CARBOPOL 980," "CARBOPOL 981," "CARBOPOL 1342," "CARBOPOL ETD2020," "PEMULEN TR-1," and "PEMULEN TR-2," Dow Chemical's "Aculyn 22," and Clariant Iberica Production SA's "Aristoflex AVC" and "Aristoflex HMB." The thickener can also be formulated as a dispersion in a dispersing medium.

[0052] The content of component (D) in the composition of the present invention is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, and even more preferably 0.1% by mass or more, from the viewpoints of improving the repellent effect, ensuring excellent application to the skin by dispersing or dissolving each component well, and ensuring the long-term storage stability of the composition. From the same viewpoints, it is preferably 5% by mass or less, more preferably 3% by mass or less, and even more preferably 1% by mass or less. When the composition of the present invention contains a thickener having surfactant properties, the content of other surfactants in the composition is preferably 1.5% by mass or less, more preferably 1% by mass or less.

[0053] <Other ingredients> The composition of the present invention may contain other ingredients, such as surfactants, preservatives, colorants, moisturizers, fragrances other than component (B), pH adjusters, etc., as appropriate, within the scope of not impairing the effects of the present invention. It may also contain medicinal or physiologically active ingredients, such as vitamins, blood circulation promoters, active oxygen scavengers, anti-inflammatory agents, whitening agents, and disinfectants. It may also be used for other purposes, such as using the fragrance as a disinfectant.

[0054] It is preferable that the composition of the present invention contains component (A) and component (B) as repellent components for pest repellency, and does not contain any other pest repellent in effective amounts, from the viewpoint of preventing allergies and rough skin in users. The composition of the present invention has a sustained repellent effect even if it does not contain an effective amount of a pest repellent other than component (A) and component (B). In other words, even if the composition of the present invention contains an existing pest repellent other than component (A) and component (B) in an amount less than the lower limit of the effective amount, the retention-inhibiting effect of the present invention is exerted as long as the pest does not remain in place even after landing. In other words, the composition of the present invention does not need to substantially contain an existing pest repellent other than component (A) and component (B).

[0055] Here, "not containing an effective amount" of pest repellents other than components (A) and (B) generally means that the content of pest repellents other than components (A) and (B) in the composition of the present invention is preferably 15% by mass or less, more preferably 10% by mass or less, even more preferably 5% by mass or less, still more preferably 4% by mass or less, even more preferably 3% by mass or less, and even more preferably 1% by mass or less. The effective amount of an existing pest repellent can be determined by, for example, the minimum effective amount published by the manufacturer of each repellent product. More specifically, the effective amount of DEET: N,N-diethyltoluamide, an existing pest repellent described below, is 4% by mass or more, preferably 10% by mass or more, the effective amount of icaridin: 1-methylpropyl-2-(2-hydroxyethyl)-1-piperidinecarboxylate is 4% by mass or more, the effective amount of IR3535: 3-(acetylbutyl)aminopropionic acid ethyl ester is 4% by mass or more, and the effective amount of citronella oil is 10% by mass or more.

[0056] The effective amount of an existing pest repellent can also be measured by the repellency evaluation test described below. (Repellency evaluation test) One hundred mated female mosquitoes (Aedes albopictus) were placed in a mesh-enclosed plastic cage (30 x 30 x 30 cm: BugDorm-1 cage). A rectangular slit measuring 5 cm long and 4 cm wide was made in a pair of Qualatech Super Long Gloves (50 cm) (AS ONE Corporation, Catalog number: 3-6432-02) approximately 15 cm from the wrist toward the elbow, and the arm was inserted into the glove. Without applying any coating to the exposed area beyond the slit, the arm was inserted into the cage, and within two minutes, it was confirmed that the mosquitoes landed on two exposed areas of the skin and remained there for at least one second. If the mosquitoes did not remain there for at least one second, a new mosquito was prepared. Hereinafter, a stay of at least one second will be referred to simply as a stay. The test of the evaluation sample, which is a solution of pest repellent, was carried out by applying the evaluation sample at a concentration of 2 mg / cm2 to the exposed skin area (5 cm x 4 cm). 2 The concentration is adjusted with ethanol so that it can be applied easily. Using a pipette, apply the adjusted solution to the exposed area, ensuring that it is evenly distributed over the entire exposed area (amount of solution required: 40-50 μl). Leave the solution for 3 minutes before starting the test. The test is conducted by inserting the arm coated with the evaluation sample into the cage for 2 minutes and counting the number of stops. The test is terminated when a total of two stops have been made, and the arm is inserted for 2 minutes every 30 minutes until the end of the test. If a second stop occurs at 30 minutes, the duration of the repellent effect is determined to be 0 minutes, and if a second stop occurs at 60 minutes, the duration of the repellent effect is determined to be 30 minutes. The test is conducted on three subjects, and the average duration of the repellent effect is calculated. In this test, the concentration of the pest repellent that shows an average duration of repellent effect of 2 hours or more can be defined as the effective concentration (effective amount) of that pest repellent. Since the composition of the present invention has a sustained repellent effect even without containing an effective amount of a pest repellent other than component (A) and component (B), it is preferable that the composition of the present invention contains substantially no pest repellent other than component (A) and component (B). The content of pest repellent other than component (A) and component (B) in the composition of the present invention is preferably 0.5% by mass or less, more preferably 0.1% by mass or less, even more preferably 0.01% by mass or less, and even more preferably substantially 0% by mass.

[0057] Examples of existing pest repellents other than component (A) and component (B) include known pest repellent compounds such as DEET, icaridin, dimethyl phthalate, 2-ethyl-1,3-hexanediol, p-menthane-3,8-diol, carane-3,4-diol, di-n-butyl succinate, hydroxyanisole, rotenone, 3-(acetylbutyl)aminopropionic acid ethyl ester, citronellol, eucalyptol, α-pinene, geraniol, citronellal, camphor, linalool, and 2-undecanone, as well as repellent essential oils such as citronella oil and lemongrass oil. "Repellent essential oil" refers to essential oils that have pest repellent effects and are obtained by extracting, distilling, or compressing components contained in plants.

[0058] The composition of the present invention can be produced by a conventional method, for example, by blending components (A) and (B) and other components used as needed, and stirring the mixture using a known device.

[0059] There are no particular restrictions on the pests that the composition of the present invention can repel, but it is more effective against flying pests. "Flying pests" refer to pests that fly towards humans and other animals and suck their blood from their skin, pests that fly but do not suck blood but transmit pathogenic bacteria, and pests whose flying behavior is unpleasant to humans. Specific examples of flying pests include Culex pipiens pallens, Culex tritaeniorhynchus, Culex molestus, Culex quinquefasciatus, and other mosquitoes, Aedes aegypti, Aedes albopictus, Anopheles sinensis, Aedes togoi, Anopheles gambiae, and Anopheles stephensis; chironomids such as Chironomid midges and Chironomid akamusi; black flies such as Juniperus nigricans, Juniperus quinquefasciatus, and Simulium japonica; house flies, houseflies, and other insects. Flies such as house flies, little house flies, blow flies, flesh flies, seed flies, onion flies, fruit flies, Drosophila melanogaster, moth flies, checker flies, and stable flies; horse flies such as black flies, horse flies, deer flies, and spotted flies; midges such as Culicoides tokunaga, Culicoides oshimaensis, and chicken midges; and wasps such as Japanese yellow hornets, paper wasps, and honeybees. The composition of the present invention has an excellent long-lasting repellent effect against mosquitoes, particularly Culex pipiens pallens, Culex tritaeniorhynchus, Culex pipiens molestus, Culex quinquefasciatus, Aedes aegypti, and Aedes albopictus.

[0060] [Methods for repelling and suppressing pests] The method for repelling pests of the present invention is carried out by applying the pest repellent composition of the present invention to the surface of human skin. Furthermore, the method for inhibiting pest retention of the present invention involves applying the pest retention suppression composition of the present invention to the legs of pests, particularly flying pests, thereby preventing the pests from retaining on human skin. Hereinafter, these methods are collectively referred to as the "method of the present invention."

[0061] Here, "applying to the surface of the skin" includes not only applying the composition directly to the skin surface with the hands, but also attaching the composition to the skin surface by spraying or the like. The amount of the composition applied to the skin surface is set to 1 cm from the viewpoint of improving the duration of the repellent effect. 2 The upper limit of the amount of application is preferably 0.1 mg or more, more preferably 0.2 mg or more, and even more preferably 0.25 mg or more per 1 cm from the viewpoint of suppressing stickiness and economic efficiency. 2 It is preferably 10 mg or less, more preferably 8 mg or less, and even more preferably 5 mg or less per unit area.

[0062] From the viewpoint of providing a repellent composition that has an excellent and sustained mosquito repellent effect, is safe, suppresses the strong odor derived from the repellent components, and is easy to use, the composition of the present invention is preferably an oil-in-water mosquito repellent composition or mosquito retention and inhibition composition that contains the following components (A) to (C), and in which the content of pest repellents other than components (A) and (B) is 15 mass % or less. (A) one or more non-volatile liquid oily components selected from the group consisting of silicone oils, ester oils, ether oils, hydrocarbon oils, aliphatic alcohols, and polyhydric alcohols, each having a surface tension of 40 mN / m or less at 25°C and a viscosity of 400 mPa·s or less at 23°C as measured by a B-type rotational viscometer: 13% by mass or more and 50% by mass or less (B) One or more fragrances selected from the group consisting of the following (B1) to (B9): 0.05% by mass or more and 3.5% by mass or less (B1) One or more lactones selected from the group consisting of octahydro-2H-1-benzopyran-2-one, gamma decalactone, delta decalactone, delta nonalactone, and gamma undecalactone (B2) 9-Ethylidene-3-oxatricyclo[6.2.1.0 2,7 ] one or more ketones selected from the group consisting of undecan-4-one, and octahydro-7-methyl-1,4-methanonaphthalen-6(2H)-one (B3) One or more aldehydes selected from the group consisting of 7-hydroxy-3,7-dimethyloctanal and octahydro-5-methoxy-4,7-methano-1H-indene-2-carboxaldehyde (B4) One or more aromatic alcohols selected from the group consisting of phenylethylmethylethylcarbinol, cinnamic alcohol, and eugenol (B5) 2-(4-methyl-2-thiazolyl)ethanol (B6) Ethyl 2-phenylacetate (B7) (3-pentyloxan-4-yl) acetate (B8) Phenylethyl dimethylcarbinyl acetate (B9) Methyl anthranilate (C) Water: 35% by mass or more and 86.95% by mass or less

[0063] From the viewpoint of providing a repellent composition that has an excellent and sustained mosquito repellent effect, is safe, suppresses the strong odor derived from the repellent components, and is easy to use, the composition of the present invention is preferably an oil-in-water mosquito repellent composition or mosquito retention and inhibition composition, which contains the following components (A) to (C), the mass ratio of component (A) to component (B) [(A) / (B)] is 10 or more and 400 or less, and the content of pest repellents other than components (A) and (B) is 15 mass% or less. (A) one or more non-volatile liquid oily components selected from the group consisting of silicone oils, ester oils, ether oils, hydrocarbon oils, aliphatic alcohols, and polyhydric alcohols, each having a surface tension of 40 mN / m or less at 25°C and a viscosity of 400 mPa·s or less at 23°C as measured by a B-type rotational viscometer: 13% by mass or more and 50% by mass or less (B) One or more fragrances selected from the group consisting of the following (B1) to (B9): 0.05% by mass or more and 3.5% by mass or less (B1) One or more lactones selected from the group consisting of octahydro-2H-1-benzopyran-2-one, gamma decalactone, delta decalactone, delta nonalactone, and gamma undecalactone (B2) 9-Ethylidene-3-oxatricyclo[6.2.1.0 2,7 ] one or more ketones selected from the group consisting of undecan-4-one, and octahydro-7-methyl-1,4-methanonaphthalen-6(2H)-one (B3) One or more aldehydes selected from the group consisting of 7-hydroxy-3,7-dimethyloctanal and octahydro-5-methoxy-4,7-methano-1H-indene-2-carboxaldehyde (B4) One or more aromatic alcohols selected from the group consisting of phenylethylmethylethylcarbinol, cinnamic alcohol, and eugenol (B5) 2-(4-methyl-2-thiazolyl)ethanol (B6) Ethyl 2-phenylacetate (B7) (3-pentyloxan-4-yl) acetate (B8) Phenylethyl dimethylcarbinyl acetate (B9) Methyl anthranilate (C) Water: 35% by mass or more and 86.95% by mass or less

[0064] From the viewpoint of providing a repellent composition that has an excellent and sustained mosquito repellent effect, is safe, suppresses the strong odor derived from the repellent components, and is easy to use, the composition of the present invention is preferably an oil-in-water mosquito repellent composition or mosquito retention and inhibition composition, which contains the following components (A) to (C), the mass ratio of component (A) to component (B) [(A) / (B)] is 10 or more and 400 or less, and the content of pest repellents other than components (A) and (B) is 15 mass% or less. (A) one or more non-volatile liquid oily components selected from the group consisting of silicone oils, ester oils, ether oils, hydrocarbon oils, aliphatic alcohols, and polyhydric alcohols, each having a surface tension of 40 mN / m or less at 25°C and a viscosity of 400 mPa·s or less at 23°C as measured by a B-type rotational viscometer: 13% by mass or more and 50% by mass or less (B) one or more fragrances selected from octahydro-2H-1-benzopyran-2-one and 7-hydroxy-3,7-dimethyloctanal: 0.05% by mass or more and 3.5% by mass or less (C) Water: 35% by mass or more and 86.95% by mass or less

[0065] From the viewpoint of providing a repellent composition that has an excellent and sustained mosquito repellent effect, is safe, suppresses the strong odor derived from the repellent components, and is easy to use, the composition of the present invention is preferably an oil-in-water mosquito repellent composition or mosquito retention and inhibition composition, which contains the following components (A) to (D), the mass ratio of component (A) to component (B) [(A) / (B)] is 10 or more and 400 or less, and the content of pest repellents other than components (A) and (B) is 15 mass% or less. (A) one or more non-volatile liquid oily components selected from the group consisting of silicone oils, ester oils, and hydrocarbon oils, each having a surface tension of 40 mN / m or less at 25°C and a viscosity of 400 mPa·s or less at 23°C as measured by a B-type rotational viscometer: 13% by mass or more and 50% by mass or less (B) one or more fragrances selected from octahydro-2H-1-benzopyran-2-one and 7-hydroxy-3,7-dimethyloctanal: 0.05% by mass or more and 3.5% by mass or less (C) Water: 35% by mass or more and 86.95% by mass or less (D) Thickener: 0.05% by mass or more and 3% by mass or less

[0066] The pest repellent method of the present invention is a method of repelling pests by preventing pests such as mosquitoes from remaining on the surface even if they land on an object to which the composition of the present invention has been applied or attached, and specifically has a retention inhibitory effect of preventing pests such as mosquitoes from remaining on the skin surface of an animal such as a human for a period of time that allows them to insert their stingers, specifically, for example, one second or more, after landing on the skin of the animal. Such an effect is based on a novel pest repellent principle, and is safe with no side effects such as rough skin.

[0067] In addition to the above-described embodiments, the present invention also discloses the following embodiments. <1> A pest repellent composition or pest retention / inhibition composition comprising the following components (A) and (B), wherein the mass ratio of component (A) to component (B) [(A) / (B)] is 10 or more and 400 or less: (A) one or more non-volatile liquid oily components selected from the group consisting of silicone oils, ester oils, ether oils, hydrocarbon oils, aliphatic alcohols, and polyhydric alcohols, each having a surface tension of 40 mN / m or less at 25°C and a viscosity of 400 mPa·s or less at 23°C as measured by a B-type rotational viscometer: 13% by mass or more and 99.95% by mass or less (B) One or more fragrances selected from the group consisting of the following (B1) to (B9): 0.05% by mass or more and 3.5% by mass or less (B1) One or more lactones selected from the group consisting of octahydro-2H-1-benzopyran-2-one, gamma decalactone, delta decalactone, delta nonalactone, and gamma undecalactone (B2) 9-Ethylidene-3-oxatricyclo[6.2.1.0 2,7 ] one or more ketones selected from the group consisting of undecan-4-one, and octahydro-7-methyl-1,4-methanonaphthalen-6(2H)-one (B3) One or more aldehydes selected from the group consisting of 7-hydroxy-3,7-dimethyloctanal and octahydro-5-methoxy-4,7-methano-1H-indene-2-carboxaldehyde (B4) One or more aromatic alcohols selected from the group consisting of phenylethylmethylethylcarbinol, cinnamic alcohol, and eugenol (B5) 2-(4-methyl-2-thiazolyl)ethanol (B6) Ethyl 2-phenylacetate (B7) (3-pentyloxan-4-yl) acetate (B8) Phenylethyl dimethylcarbinyl acetate (B9) Methyl anthranilate <2> The mass ratio of component (A) to component (B) [(A) / (B)] is preferably 15 or more, more preferably 30 or more, even more preferably 40 or more, and is preferably 300 or less, more preferably 150 or less, even more preferably 120 or less, still more preferably 100 or less, and even more preferably 70 or less. <1> The composition described in <3> The content of pest repellents other than component (A) and component (B) is 15% by mass or less, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 4% by mass or less, still more preferably 3% by mass or less, and even more preferably 1% by mass or less. <1> or <2> The composition described in <4> the pest repellent other than component (A) and component (B) is one or more selected from the group consisting of DEET, icaridin, dimethyl phthalate, 2-ethyl-1,3-hexanediol, p-menthane-3,8-diol, carane-3,4-diol, di-n-butyl succinate, hydroxyanisole, rotenone, 3-(acetylbutyl)aminopropionic acid ethyl ester, citronellol, eucalyptol, α-pinene, geraniol, citronellal, camphor, linalool, 2-undecanone, citronella oil, and lemongrass oil; <3> The composition described in <5> The surface tension of component (A) at 25°C is 15 mN / m or more, preferably 17 mN / m or more, and 30 mN / m or less, preferably 28 mN / m or less, more preferably 25 mN / m or less, even more preferably 23 mN / m or less, and still more preferably 21 mN / m or less. <1> ~ <4> The composition described in any one of the above. <6> the viscosity of component (A) at 23°C as measured with a Brookfield rotational viscometer is 1 mPa s or more and 300 mPa s or less, preferably 210 mPa s or less, more preferably 100 mPa s or less, even more preferably 60 mPa s or less, still more preferably 40 mPa s or less, and still more preferably 30 mPa s or less; <1> ~ <5> The composition described in any one of the above. <7> Component (A) is one or more oils selected from the group consisting of silicone oil, ester oil, ether oil, and hydrocarbon oil, preferably one or more oils selected from the group consisting of silicone oil, ester oil, and hydrocarbon oil, more preferably one or more oils selected from the group consisting of silicone oil and ester oil, and even more preferably silicone oil. <1> ~ <6> The composition described in any one of the above. <8> The content of component (A) is preferably 20% by mass or more, more preferably 25% by mass or more, and preferably 80% by mass or less, more preferably 50% by mass or less, even more preferably 40% by mass or less, and even more preferably 35% by mass or less. <1> ~ <7> The composition described in any one of the above. <9> Component (B) is preferably octahydro-2H-1-benzopyran-2-one, gamma decalactone, gamma undecalactone, 9-ethylidene-3-oxatricyclo[6.2.1.0 2,7 ]undecan-4-one, octahydro-7-methyl-1,4-methanonaphthalen-6(2H)-one, 7-hydroxy-3,7-dimethyloctanal, octahydro-5-methoxy-4,7-methano-1H-indene-2-carboxaldehyde, phenylethylmethylethylcarbinol, eugenol, 2-(4-methyl-2-thiazolyl)ethanol, (3-pentyloxan-4-yl)acetate, and methyl anthranilate, more preferably one or more selected from the group consisting of octahydro-2H-1-benzopyran-2-one and 7-hydroxy-3,7-dimethyloctanal, and even more preferably octahydro-2H-1-benzopyran-2-one, <1> ~ <8> The composition described in any one of the above. <10> The content of component (B) in the composition is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, even more preferably 0.3% by mass or more, and is preferably 2.5% by mass or less, more preferably 2.0% by mass or less, even more preferably 1.0% by mass or less, and still more preferably 0.7% by mass or less. <1> ~ <9> The composition described in any one of the above.

[0068] <11> Contains water as component (C), <1> ~ <10> The composition described in any one of the above. <12> The content of component (C) is 5% by mass or more, preferably 10% by mass or more, more preferably 35% by mass or more, and even more preferably 50% by mass or more, and is 86.95% by mass or less, preferably 85% by mass or less, more preferably 80% by mass or less, and even more preferably 75% by mass or less. <11> The composition described in <13> It is an oil-in-water composition, and the content of component (C) in the composition is preferably 35% by mass or more, more preferably 40% by mass or more, even more preferably 50% by mass or more, and is preferably 86.95% by mass or less, more preferably 80% by mass or less, more preferably 75% by mass or less. <11> or <12> The composition described in <14> It is a water-in-oil composition, and the content of component (C) in the composition is preferably 5% by mass or more, more preferably 10% by mass or more, even more preferably 15% by mass or more, and is 40% by mass or less, preferably 30% by mass or less, more preferably 25% by mass or less. <11> or <12> The composition described in <15> the mass ratio of component (A) to component (C) [(A) / (C)] is preferably 0.05 or more, more preferably 0.1 or more, even more preferably 0.15 or more, still more preferably 0.3 or more, and is preferably 10 or less, more preferably 3 or less, even more preferably 1 or less, and still more preferably 0.7 or less; <11> ~ <14> The composition described in any one of the above. <16> Further, the composition contains a thickener as component (D) in an amount of preferably 0.01% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.1% by mass or more, and preferably 5% by mass or less, more preferably 3% by mass or less, even more preferably 1% by mass or less. <1> ~ <15> The composition described in any one of the above. <17> An oil-in-water mosquito repellent or mosquito retention / inhibition composition comprising the following components (A) to (C), wherein the content of pest repellents other than components (A) and (B) is 15 mass % or less: (A) one or more non-volatile liquid oily components selected from the group consisting of silicone oils, ester oils, ether oils, hydrocarbon oils, aliphatic alcohols, and polyhydric alcohols, each having a surface tension of 40 mN / m or less at 25°C and a viscosity of 400 mPa·s or less at 23°C as measured by a B-type rotational viscometer: 13% by mass or more and 50% by mass or less (B) One or more fragrances selected from the group consisting of the following (B1) to (B9): 0.05% by mass or more and 3.5% by mass or less (B1) One or more lactones selected from the group consisting of octahydro-2H-1-benzopyran-2-one, gamma decalactone, delta decalactone, delta nonalactone, and gamma undecalactone (B2) 9-Ethylidene-3-oxatricyclo[6.2.1.0 2,7 ] one or more ketones selected from the group consisting of undecan-4-one, and octahydro-7-methyl-1,4-methanonaphthalen-6(2H)-one (B3) One or more aldehydes selected from the group consisting of 7-hydroxy-3,7-dimethyloctanal and octahydro-5-methoxy-4,7-methano-1H-indene-2-carboxaldehyde (B4) One or more aromatic alcohols selected from the group consisting of phenylethylmethylethylcarbinol, cinnamic alcohol, and eugenol (B5) 2-(4-methyl-2-thiazolyl)ethanol (B6) Ethyl 2-phenylacetate (B7) (3-pentyloxan-4-yl) acetate (B8) Phenylethyl dimethylcarbinyl acetate (B9) Methyl anthranilate (C) Water: 35% by mass or more and 86.95% by mass or less <18> An oil-in-water mosquito repellent composition or mosquito retention and inhibition composition comprising the following components (A) to (C), wherein the mass ratio of component (A) to component (B) [(A) / (B)] is 10 or more and 400 or less, and the content of pest repellents other than components (A) and (B) is 15 mass% or less: (A) one or more non-volatile liquid oily components selected from the group consisting of silicone oils, ester oils, ether oils, hydrocarbon oils, aliphatic alcohols, and polyhydric alcohols, each having a surface tension of 40 mN / m or less at 25°C and a viscosity of 400 mPa·s or less at 23°C as measured by a B-type rotational viscometer: 13% by mass or more and 50% by mass or less (B) One or more fragrances selected from the group consisting of the following (B1) to (B9): 0.05% by mass or more and 3.5% by mass or less (B1) One or more lactones selected from the group consisting of octahydro-2H-1-benzopyran-2-one, gamma decalactone, delta decalactone, delta nonalactone, and gamma undecalactone (B2) 9-Ethylidene-3-oxatricyclo[6.2.1.0 2,7 ] one or more ketones selected from the group consisting of undecan-4-one, and octahydro-7-methyl-1,4-methanonaphthalen-6(2H)-one (B3) One or more aldehydes selected from the group consisting of 7-hydroxy-3,7-dimethyloctanal and octahydro-5-methoxy-4,7-methano-1H-indene-2-carboxaldehyde (B4) One or more aromatic alcohols selected from the group consisting of phenylethylmethylethylcarbinol, cinnamic alcohol, and eugenol (B5) 2-(4-methyl-2-thiazolyl)ethanol (B6) Ethyl 2-phenylacetate (B7) (3-pentyloxan-4-yl) acetate (B8) Phenylethyl dimethylcarbinyl acetate (B9) Methyl anthranilate (C) Water: 35% by mass or more and 86.95% by mass or less

[0069] <19> An oil-in-water mosquito repellent composition or mosquito retention and inhibition composition comprising the following components (A) to (C), wherein the mass ratio of component (A) to component (B) [(A) / (B)] is 10 or more and 400 or less, and the content of pest repellents other than components (A) and (B) is 15 mass% or less: (A) one or more non-volatile liquid oily components selected from the group consisting of silicone oils, ester oils, ether oils, hydrocarbon oils, aliphatic alcohols, and polyhydric alcohols, each having a surface tension of 40 mN / m or less at 25°C and a viscosity of 400 mPa·s or less at 23°C as measured by a B-type rotational viscometer: 13% by mass or more and 50% by mass or less (B) one or more fragrances selected from octahydro-2H-1-benzopyran-2-one and 7-hydroxy-3,7-dimethyloctanal: 0.05% by mass or more and 3.5% by mass or less (C) Water: 35% by mass or more and 86.95% by mass or less <20> An oil-in-water mosquito repellent composition or mosquito retention and inhibition composition comprising the following components (A) to (D), wherein the mass ratio of component (A) to component (B) [(A) / (B)] is 10 or more and 400 or less, and the content of pest repellents other than components (A) and (B) is 15 mass% or less: (A) one or more non-volatile liquid oily components selected from the group consisting of silicone oils, ester oils, and hydrocarbon oils, each having a surface tension of 40 mN / m or less at 25°C and a viscosity of 400 mPa·s or less at 23°C as measured by a B-type rotational viscometer: 13% by mass or more and 50% by mass or less (B) one or more fragrances selected from octahydro-2H-1-benzopyran-2-one and 7-hydroxy-3,7-dimethyloctanal: 0.05% by mass or more and 3.5% by mass or less (C) Water: 35% by mass or more and 86.95% by mass or less (D) Thickener: 0.05% by mass or more and 3% by mass or less <21> the pest repellent other than component (A) and component (B) is one or more selected from the group consisting of DEET, icaridin, dimethyl phthalate, 2-ethyl-1,3-hexanediol, p-menthane-3,8-diol, carane-3,4-diol, di-n-butyl succinate, hydroxyanisole, rotenone, 3-(acetylbutyl)aminopropionic acid ethyl ester, citronellol, eucalyptol, α-pinene, geraniol, citronellal, camphor, linalool, 2-undecanone, citronella oil, and lemongrass oil; <17> ~ <20> The composition described in any one of the above. <22> <1> ~ <21> A method for repelling pests, comprising applying the composition described in any one of the above to the surface of human skin. <23> <1> ~ <21> A method for inhibiting pest retention, which comprises applying the composition described in any one of the above to the legs of a pest to prevent the pest from retaining on human skin. [Example]

[0070] The present invention will be described below with reference to examples, but the present invention is not limited to the scope of the examples. In the examples, various measurements and evaluations were carried out by the following methods.

[0071] (Surface tension of liquid oily components) The surface tension of the liquid oily component is measured in an environment of 25°C using an automatic surface tensiometer "Tensiometer K100" (KRUSS) by the Wilhelmy method using a platinum plate.

[0072] (Viscosity of liquid oily component) We used a Toki Sangyo Co., Ltd. "Viscometer TVB-10" as a B-type rotational viscometer in accordance with JIS K7117-1:1999. Because the viscosity values of the components to be measured vary greatly for each sample, it is difficult to accurately measure all of them under a single set of measurement conditions. Therefore, measurements were performed using two types of rotors. Viscosity was first measured using rotor M2 at a rotation speed of 12 rpm in an environment of 23°C. Components with a viscosity of 2500 mPa·s or higher were then measured again at a rotation speed of 6 rpm to obtain viscosity values. On the other hand, components with a viscosity of 20 mPa·s or less were measured again using an L adapter, a rotor for low viscosity, at a rotation speed of 30 rpm in a 23°C environment to obtain viscosity values.

[0073] (Evaluation of sustained repellent effect against pests) (I) Preparation of Aedes albopictus The Aedes albopictus mosquitoes used were Aedes albopictus eggs provided by Sumitomo Technoservice Co., Ltd., which were reared in a cage under conditions of 27°C and 60% relative humidity (RH) and allowed to grow into adults. A transparent plastic pan was filled with approximately 1 cm of water, and the purchased filter paper with the eggs was placed inside. The eggs were then allowed to hatch into pupae. The hatched pupae were then fed tropical fish food (Tetramine) daily as larval food. After one week, the pupae were collected with a dropper, transferred to a 20 mL plastic cup, and then transferred to a cage with a net. The pupae were fed 10% sucrose by mass in a 25 mL plastic tube as adult food. After emergence, males and females were reared in the same cage for five days to allow mating. After five days of rearing, the adults were collected using an aspirator, anesthetized on ice for five minutes, and then visually separated into males and females. Only the females were collected and used for evaluation.

[0074] (II) Measurement of repellent duration (repellency rate 3 hours after application of the composition) Two hundred female Aedes albopictus mosquitoes were transferred to a mesh cage (30 x 30 x 30 cm) and tested at 27°C and 60% RH. For the repellency test, a Bio Skin Plate (BEAULAX, 4.5 cm x 4.5 cm), a model skin that replicates the surface of human skin, was used, heated to 40°C with a heater. The mesh cage had a 4.5 cm x 4.5 cm opening, allowing mosquitoes to land directly on the model skin. The mosquito repellency rate was calculated as follows: (1) Measurement of the number of control accretion The above-mentioned heated model skin (without application of the composition) was placed on a mesh cage containing mosquitoes, and after activating it by exhaling for 5 seconds, the number of mosquitoes that landed on the model skin was counted every 10 seconds for 2 minutes, and the average number was recorded as landing number 1. (2) Calculation of repellency rate 3 hours after application of the composition Next, 2 mg / cm was applied to the model skin. 2 The test composition was applied, and after 3 hours had passed, the test piece was placed on the mesh gauge in the same way. After activating it by exhaling for 5 seconds, the number of mosquitoes that landed on the model skin was counted every 10 seconds for 2 minutes, and the average number was taken as the landing number 2. The repellency rate of each composition 3 hours after application was calculated using the values of deposition numbers 1 and 2 above as follows: "repellency rate" = (deposition number 1 - deposition number 2) / (deposition number 1) x 100 (%).

[0075] (Odor intensity evaluation) Each composition was applied at 2 mg / cm2 to a 4.5 x 4.5 cm area on the inside of a human forearm. 2 The product was applied so that the odor was uniform and left to stand for three hours. After that, the odor intensity was determined by a sensory evaluation by three evaluators. The odor intensity was evaluated on a six-point scale (5: strong odor, 4: strong odor, 3: easily detectable odor, 2: weak odor that is recognizable, 1: barely detectable odor, 0: odorless), and the average value of the three evaluators' ratings was taken as the odor intensity. The odor intensity suitable for application to the skin was classified as follows: The smaller the number, the less odor there is and the better the composition. A: 2.5 or less B: More than 2.5 but less than 3.5 C: over 3.5

[0076] (Evaluation of long-term storage stability) 80 mL of each composition was placed in a 100 mL glass bottle, sealed, and stored at 50°C for one month. After that, the presence or absence of separation of the oil phase in the composition was visually confirmed and evaluated according to the following criteria. A: No change. B: The oil phase is united, and some seepage from the emulsion to the surface is observed. C: Separation of the oil phase is observed.

[0077] Examples 1 to 39 and Comparative Examples 1 to 24 (Production and Evaluation of Compositions) The components shown in Table 1 were blended in the amounts shown in Tables 2 to 7, and the blends were stirred for 2 minutes at 8,000 rpm using a TK Robomix (Tokushu Kika Kogyo Co., Ltd.) with the stirring unit replaced by a TK Homomixer MARK II 2.5 type, to obtain the oil-in-water compositions of each example. The designations (A) to (D) in the tables correspond to components (A) to (D) in this specification, respectively, and the designation (a) corresponds to a liquid oily component outside the scope of component (A) in this specification. The blend amounts listed in Tables 2 to 7 are the active ingredient amounts (% by mass) of each component. The resulting compositions were evaluated using the methods described above. The results are shown in Tables 2 to 7.

[0078] [Table 1]

[0079] [Table 2]

[0080] [Table 3]

[0081] [Table 4]

[0082] [Table 5]

[0083] [Table 6]

[0084] [Table 7]

[0085] Tables 2 and 4 to 7 show that the compositions of the present invention (Examples 1 to 39) containing predetermined amounts of components (A) and (B) have a high repellency rate 3 hours after application, excellent durability of the repellent effect, a low odor intensity, and suppression of the odor derived from component (B), which is a fragrance with a repellent effect. [Industrial Applicability]

[0086] According to the present invention, it is possible to provide a pest repellent composition, a pest retention and inhibition composition, a pest repellent method, and a pest retention and inhibition method that have an excellent and long-lasting repellent effect against pests, particularly flying pests, are safe, suppress the strong odor derived from repellent fragrances, and are suitable for application to the skin.

Claims

1. A method for repelling pests, comprising applying a pest repellent composition containing the following components (A), (B), and (D) to an object, and allowing the composition to adhere to the legs of pests that land on the object. (A) one or more non-volatile liquid oily components selected from the group consisting of silicone oils, ester oils, ether oils, hydrocarbon oils, aliphatic alcohols, and polyhydric alcohols, each having a surface tension of 40 mN / m or less at 25°C and a viscosity of 400 mPa·s or less at 23°C as measured by a Brookfield rotational viscometer: 13% by mass or more and 99.95% by mass or less (B) One or more fragrances selected from the group consisting of the following (B1) to (B9): 0.05% by mass or more and 3.5% by mass or less (B1) One or more lactones selected from the group consisting of octahydro-2H-1-benzopyran-2-one, gamma decalactone, delta decalactone, delta nonalactone, and gamma undecalactone (B2) 9-ethylidene-3-oxatricyclo[6.2.1.0 2,7 ] one or more ketones selected from the group consisting of undecane-4-one, and octahydro-7-methyl-1,4-methanonaphthalen-6(2H)-one (B3) One or more aldehydes selected from the group consisting of 7-hydroxy-3,7-dimethyloctanal and octahydro-5-methoxy-4,7-methano-1H-indene-2-carboxaldehyde (B4) One or more aromatic alcohols selected from the group consisting of phenylethylmethylethylcarbinol, cinnamic alcohol, and eugenol (B5) 2-(4-methyl-2-thiazolyl)ethanol (B6) Ethyl-2-phenylacetate (B7) (3-pentyloxan-4-yl) acetate (B8) Phenylethyl dimethylcarbinyl acetate (B9) methyl anthranilate (D) Thickener

2. A method for inhibiting the retention of pests by applying a pest retention-inhibiting composition containing the following components (A), (B), and (D) to the legs of the pests. (A) one or more non-volatile liquid oily components selected from the group consisting of silicone oils, ester oils, ether oils, hydrocarbon oils, aliphatic alcohols, and polyhydric alcohols, each having a surface tension of 40 mN / m or less at 25°C and a viscosity of 400 mPa·s or less at 23°C as measured by a Brookfield rotational viscometer: 13% by mass or more and 99.95% by mass or less (B) One or more fragrances selected from the group consisting of the following (B1) to (B9): 0.05% by mass or more and 3.5% by mass or less (B1) One or more lactones selected from the group consisting of octahydro-2H-1-benzopyran-2-one, gamma decalactone, delta decalactone, delta nonalactone, and gamma undecalactone (B2) 9-ethylidene-3-oxatricyclo[6.2.1.0 2,7 ] one or more ketones selected from the group consisting of undecane-4-one, and octahydro-7-methyl-1,4-methanonaphthalen-6(2H)-one (B3) One or more aldehydes selected from the group consisting of 7-hydroxy-3,7-dimethyloctanal and octahydro-5-methoxy-4,7-methano-1H-indene-2-carboxaldehyde (B4) One or more aromatic alcohols selected from the group consisting of phenylethylmethylethylcarbinol, cinnamic alcohol, and eugenol (B5) 2-(4-methyl-2-thiazolyl)ethanol (B6) Ethyl-2-phenylacetate (B7) (3-pentyloxan-4-yl) acetate (B8) Phenylethyl dimethylcarbinyl acetate (B9) methyl anthranilate (D) Thickener

3. 3. The method according to claim 1, wherein component (A) is at least one oil selected from the group consisting of silicone oil, ester oil, and hydrocarbon oil.

4. The method according to any one of claims 1 to 3, wherein the content of component (A) is 13% by mass or more and 75% by mass or less.

Images