Insect repellent composition

Abstract

This invention relates to an insect repellent composition that not only exhibits consistently excellent repellent effects from the time of application to the skin through contact with moisture, but also provides a pleasant user experience while being easily removed by washing. [Solution] The following components (A) to (D): (A) One or more non-volatile liquid oils selected from silicone oils, ester oils, ether oils, hydrocarbon oils, aliphatic alcohols, and polyhydric alcohols, in an amount of 13% to 39% by mass. (B) One or more hydrophobic film-forming agents selected from silicone-based film-forming polymers and oil gelling agents. (C) Water-soluble thickener (D)Water A pest repellent composition containing the following:

Description

Technical Field

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

Background Art

[0002] Flying pests such as mosquitoes, flies, and bees are generated and reproduced from contaminated areas such as drainage and decaying foods, and approach animals such as humans by flying, causing various harms to the animals. Among them, blood-sucking pests such as mosquitoes are attracted by carbon dioxide and body odor exhaled from animals while sensing the body temperature of the animals, reach the skin surface of the animals, and suck blood. When bitten by a mosquito, not only itching occurs, but it can also cause factors for rash and dermatitis at the blood-sucking site, and in some cases, it can transmit pathogens such as dengue fever, Zika fever, yellow fever, encephalitis, and malaria. Therefore, it is considered to be very harmful hygienically.

[0003] As countermeasures for repelling such pests, various compositions for applying to the skin have been developed. Among them, as an active ingredient for repelling pests, a technique using a non-volatile liquid oily component having specific values of surface tension and viscosity has also been developed.

[0004] For example, Patent Document 1 discloses a pest repellent composition containing a non-volatile liquid oily component in a large excess and a film-forming polymer in a specific amount, aiming to improve the repellent lasting effect and its water resistance. Further, Patent Document 2 discloses an oil-in-water type or non-aqueous type pest repellent composition containing a non-volatile liquid oily component in a large excess and specific hydrophobic particles in a specific amount, and attempts have been made to make the feeling when applied to the skin good in addition to the repellent lasting effect.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

[0006] However, the technology described in the above-mentioned patent document is still insufficient and requires improvement in order to maintain a high repellent effect even after application to the skin and contact with moisture, while also providing good spreadability and usability during application, and further ensuring that it can be thoroughly removed by washing.

[0007] Therefore, the present invention relates to an insect repellent composition that not only consistently exhibits excellent repellent effects from the time of application to the skin to after contact with moisture, but also provides a pleasant user experience and is easily removed by washing. [Means for solving the problem]

[0008] Therefore, after various studies, the inventors discovered that by including a specific amount of a particular non-volatile liquid oil, along with a hydrophobic film-forming agent, a water-soluble thickener, and water, it is possible to obtain an insect repellent composition that exhibits excellent persistence of repellent effect even when in contact with moisture, as well as a pleasant feel and excellent washability.

[0009] In other words, the present invention comprises the following components (A) to (D): (A) One or more non-volatile liquid oils selected from silicone oils, ester oils, ether oils, hydrocarbon oils, aliphatic alcohols, and polyhydric alcohols, in an amount of 13% to 3% by mass. (B) One or more hydrophobic film-forming agents selected from silicone-based film-forming polymers and oil gelling agents. (C) Water-soluble thickener (D)Water This invention provides an insect repellent composition containing [a specific ingredient]. [Effects of the Invention]

[0010] The insect repellent composition of the present invention exhibits excellent spreadability when applied to the skin, allowing it to spread evenly on the skin surface, and also provides a fresh and moist feeling, resulting in a pleasant user experience. Furthermore, even after exposure to moisture such as water or sweat after application to the skin, it exhibits excellent water resistance, maintaining a good insect repellent effect, and provides a smooth, non-sticky feel. In addition, it exhibits excellent removal properties through washing, suppressing any unpleasant residue of the composition on the skin surface after washing, and also possesses good storage stability. [Modes for carrying out the invention]

[0011] The present invention will be described in detail below. In this invention, "pest" refers to so-called "flying pests," which include pests that approach humans or other animals while flying and suck blood from their skin, or pests that transmit pathogenic bacteria or the like while flying, even if they do not suck blood, or pests whose flight itself causes discomfort to humans. These pests specifically include house mosquitoes such as Culex pipiens, Culex tritaeniorhynchus, Culex pipiens, and Culex aegypti; mosquitoes such as Aedes aegypti, Aedes albopictus, Anopheles sinensis, Aedes togo, Anopheles gambia, and Anopheles stepens; midges such as Chironomus serrata and Chironomus rufipes; black flies such as Chironomus nigricans, Chironomus rufipes, and Chironomus rufipes; and houseflies. Examples include flies such as the large housefly, small housefly, black fly, flesh fly, seed fly, onion fly, fruit fly, Drosophila melanogaster, drain fly, Cheche fly, and stable fly; horseflies such as the black fly, cow fly, blind fly, and spotted fly; midges such as the Tokunaga black midge, Oshima midge, and chicken midge; and wasps such as the yellow hornet, black-legged paper wasp, and honeybee.

[0012] Furthermore, in this invention, the "repellent effect" against pests primarily refers to the effect of preventing pests from staying on or immediately leaving the skin of animals such as humans after contact (residency inhibition effect). While it may also include the effect of keeping pests away from animals such as humans, it is distinct from the effect of exhibiting insecticidal power or the effect of eliminating pests. The pest repellent composition of this invention exhibits a particularly excellent repellent effect against mosquitoes among pests. More specifically, the pest repellent composition of this invention exhibits an excellent repellent effect against mosquitoes such as Culex pipiens, Culex tritaeniorhynchus, Culex pipiens, Culex aegypti, Aedes aegypti, and Aedes albopictus. In this invention, "landing" of an insect means that the insect approaches a person or other animal and lands on their skin, but only remains in contact with the skin for less than one second. In this invention, "staying" of an insect means that the insect approaches a person or other animal, lands on their skin, and remains in contact with the skin for one second or more.

[0013] Furthermore, "water resistance" in the insect repellent composition of the present invention means the property of maintaining a good and sustained excellent repellent effect against insects even after the composition has been applied to the skin and exposed to moisture such as water or sweat, without any reduction in its excellent repellent effect against insects. Furthermore, "spreadability" in the insect repellent composition of the present invention refers to the property of being able to spread easily and smoothly on the skin without feeling excessive resistance when the composition is applied to the skin.

[0014] Furthermore, when the insect repellent composition of the present invention is applied to the skin, "moisturizing sensation" means that the skin does not become unnecessarily dry, but rather feels fresh and moisturized. Also, "non-sticky sensation" means that there is no greasy or sticky feeling, but rather a refreshing feeling. Furthermore, these qualities of "moisture" and "non-stickiness" are collectively referred to as "a pleasant user experience."

[0015] The pest repellent composition of the present invention contains, as component (A), 13% by mass or more and 39% by mass or less of one or more non-volatile liquid oils selected from silicone oil (a1), ester oil (a2), ether oil (a3), hydrocarbon oil (a4), aliphatic alcohol (a5), and polyhydric alcohol (a6). Pests have the property of avoiding staying on the surface of the skin or the like where their legs get wet in order to avoid the gravitational force generated from the surface of the skin or the like where they have landed when their legs get wet. In contrast, component (A) contained in the pest repellent composition of the present invention acts as a main component that can cause wetness on the legs of pests landed on the surface of the skin or the like and exhibit a repellent effect of inhibiting the staying of pests. Note that the "non-volatile liquid oil" means a non-volatile and liquid oily component.

[0016] Here, the "non-volatility" in component (A) means that the evaporation rate after drying for 60 minutes at 25°C under 1 atm is 50% or less. From the viewpoint of enhancing the repellent effect by retaining the component (A) on the skin for a long time, the lower the evaporation rate value of component (A), the more preferable it is. Specifically, it is more preferable that the evaporation rate after drying for 120 minutes at 25°C under 1 atm is 50% or less. Note that the evaporation rate is a value measured in accordance with the German test standard DIN53249, and specifically, it is measured by the following procedures 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​​​​​​​​​​​Here, "liquid" in component (A) means that the viscosity at 23°C measured by a B-type rotational viscometer is 120,000 mPa·s or less. Further, from the viewpoint of enhancing the persistence of the repellent effect and expressing good extensibility when applied to the skin, component (A) is preferably liquid at 25°C, more preferably liquid at 20°C, still more preferably liquid at 15°C, and even more preferably liquid at 10°C.

[0018] From the viewpoints of improving the repellent effect and water resistance, and ease 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, preferably 40 mN / m or less, more preferably 30 mN / m or less, still more preferably 28 mN / m or less, even more preferably 25 mN / m or less, even more preferably 23 mN / m or less, and even more preferably 21 mN / m or less. The surface tension of component (A) means the value measured by the Wilhelmy method using a platinum plate in an environment of 25°C using an automatic surface tensiometer "Tensiometer K100" (manufactured by KRUSS).

[0019] From the viewpoints of suppressing the volatility of component (A), enhancing the repellent effect and water resistance, and maintaining good storage stability, the viscosity of component (A) at 23°C measured by a B-type rotational viscometer is preferably 1 mPa·s or more, preferably 400 mPa·s or less, more preferably 300 mPa·s or less, still more preferably 210 mPa·s or less, even more preferably 100 mPa·s or less, even more preferably 60 mPa·s or less, even more preferably 40 mPa·s or less, and even more preferably 30 mPa·s or less.

[0020] Component (A) is preferably a poorly water-soluble or water-insoluble component from the viewpoint of enhancing repellent effect and water resistance. Specifically, its solubility in 100g of water at 20°C is preferably 1g or less, more preferably 0.5g or less, even more preferably 0.1g or less, and even more preferably substantially 0g.

[0021] The silicone oil (a1) of component (A) may be one or more silicone oils selected from dimethylpolysiloxane (dimethicone), dimethiconol (dimethylpolysiloxane having a hydroxyl group at the end), methylphenylpolysiloxane, and modified silicone.

[0022] Examples of dimethylpolysiloxanes include, for instance, one or more silicone oils selected from linear dimethylpolysiloxanes and cyclic dimethylpolysiloxanes. Among these, linear dimethylpolysiloxanes are more preferred from the viewpoint of enhancing repellent effect and water resistance. Examples of modified silicones include, for example, one or more silicone oils selected from amino-modified silicones (dimethylpolysiloxane having an amino group), amino derivative silicones, fatty acid-modified silicones, alcohol-modified silicones, aliphatic alcohol-modified silicones, epoxy-modified silicones, fluorine-modified silicones, and alkyl-modified silicones.

[0023] Among the components (a1), from the viewpoint of enhancing repellent effect and water resistance, and from the viewpoint of providing a good feel when applied to the skin, one or more silicone oils selected from dimethylpolysiloxane, dimethiconol, methylphenylpolysiloxane, and modified silicones are preferred, one or more silicone oils selected from dimethylpolysiloxane and dimethiconol are more preferred, dimethylpolysiloxane is even more preferred, and linear dimethylpolysiloxane is even more preferred.

[0024] The ester oil (a2) of component (A) can be one or more selected from ester oils (a2-1) having a linear or branched alkyl or alkenyl group or an aromatic hydrocarbon group having 1 to 23 carbon atoms, dialkyl carbonate compounds (a2-2) having one or more alkyl or alkenyl groups having 6 to 22 carbon atoms and which may also have an ethyleneoxy group attached, and other ester oils (a2-3).

[0025] Specific examples of ester oils for component (a2-1) include the following ester oils (a2-1-1), ester oil (a2-1-2), and ester oil (a2-1-3).

[0026] Ester oil (a2-1-1) is an ester oil having a linear or branched alkyl group or aromatic hydrocarbon group having 7 to 23 carbon atoms, preferably 9 to 21 carbon atoms, more preferably 9 to 17 carbon atoms, which may be substituted with a hydroxyl group, and a linear or branched alkyl group or alkenyl group having 1 to 22 carbon atoms, preferably 8 to 22 carbon atoms, more preferably 10 to 20 carbon atoms. Examples of such components (a2-1-1) include, specifically, 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, ethylhexyl 2-palmitate, and isocetyl palmitate. Examples include one or more selected from 2-ethylhexyl stearate, 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 with 12-15 carbon atoms), diethylhexyl naphthalenedicarboxylate, etc.

[0027] Ester oil (a2-1-2) is an ester oil having at least a carbonyl group and an alkyl or alkenyl group having 7 to 23 carbon atoms, preferably 7 to 17 carbon atoms, which may be substituted with a hydroxyl group. Specifically, such components (a2-1-2) include, for example, one or more selected from glyceryl tri-2-ethylhexanoate and glyceryl tricaprylate. These include one or more selected from 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, avocado oil, etc.

[0028] The ester oil (a2-1-3) is an ester oil having an aromatic hydrocarbon group having 6 to 20 carbon atoms, preferably 6 to 12 carbon atoms, more preferably 6 to 10 carbon atoms, and an alkyl or alkenyl group having 1 to 23 carbon atoms, preferably 11 to 21 carbon atoms, more preferably 11 to 15 carbon atoms, and an alkylene oxy group having 2 to 4 carbon atoms added, wherein the average number of added moles is 1 to 50, preferably 1 to 10, more preferably 1 to 5. Examples of such components (a2-1-3) include, for example, one or more selected from the following: an ester of a 3-mol propylene oxide adduct of benzyl alcohol and myristic acid, or an ester of a 3-mol propylene oxide adduct of benzyl alcohol and 2-ethylhexanoic acid.

[0029] The dialkyl carbonate compound of component (a2-2) preferably has an alkyl group with 8 to 18 carbon atoms, more preferably 12 carbon atoms, and the average number of added ethyleneoxy groups is preferably 0 to 5, more preferably 0. Specific examples of such component (a2-2) include dioctyl carbonate.

[0030] Other ester oils of component (a2-3) include one or more selected from esters of polycarboxylic acids and alcohols, esters of polycarboxylic alcohols (excluding glycerin) and fatty acids, and esters of cyclohexanecarboxylic acid and glycol. Specifically, examples include one or more selected from diisopropyl dimer acid, diisopropyl adipate, diethoxyethyl succinate, 2-ethylhexyl succinate, propanediol dicaprate, esters of neopentyl glycol such as neopentyl glycol dicaprate and neopentyl glycol di-2-ethylhexanoate and fatty acids, and ester oils of cyclohexane-1,4-dicarboxylic acid and ethoxydiglycol.

[0031] Among the components (a2), from the viewpoint of enhancing repellent effect and water resistance, one or more selected from components (a2-1-1) and (a2-3) are preferred, and one or more selected from isononyl isononanoate, isotridecyl isononanoate, isopropyl myristate, isopropyl palmitate, dioctyl carbonate, bisethoxydiglycol cyclohexane-1,4-dicarboxylic acid, and esters of neopentyl glycol and fatty acids are more preferred.

[0032] The ether oil (a3) ​​of component (A) can be one or more selected from dialkyl ether compounds (a3-1) and polyoxyalkylene alkyl ether compounds (a3-2). Component (a3-1) is an ether oil having two substituents selected from linear or branched alkyl or alkenyl groups having 6 to 22 carbon atoms, preferably 8 to 18 carbon atoms, more preferably 8 to 16 carbon atoms, and even more preferably 8 to 12 carbon atoms, and aromatic hydrocarbon groups having 6 to 24 carbon atoms, more preferably 8 to 16 carbon atoms, and even more preferably 8 to 12 carbon atoms. Examples of such components (a3-1) include one or more selected from dihexyl ether, dioctyl ether, dicaprylyl ether, and cetyl-1,3-dimethylbutyl ether.

[0033] Component (a3-2) is a polyoxyalkylene alkyl ether compound having an alkyl or alkenyl group with 6 to 22 carbon atoms, preferably 8 to 20 carbon atoms, more preferably 8 to 18 carbon atoms, and even more preferably 8 to 12 carbon atoms, and having a propyleneoxy group and / or an ethyleneoxy group added. The average number of moles of propyleneoxy groups added is preferably 1 to 13, more preferably 2 to 10, and even more preferably 3 to 10. The average number of moles of ethyleneoxy groups added is preferably 5 or less, more preferably 1 or less, and even more preferably 0. Examples of such components (a3-2) include one or more selected from polypropylene glycol, polyoxypropylene octyl ether, polyoxypropylene decyl ether, and polyoxypropylene lauryl ether.

[0034] Among the components (a3), component (a3-1) is preferred from the viewpoint of enhancing repellent effect and water resistance.

[0035] The hydrocarbon oil (a4) of component (A) can be one or more selected from liquid paraffin, liquid isoparaffin, squalane, isohexadecane, isoeicosane, hydrogenated polyisobutene, light liquid isoparaffin, heavy liquid isoparaffin, α-olefin oligomer, and cycloparaffin.

[0036] Among the components (a4), one or more selected from liquid paraffin, liquid isoparaffin, and squalane are preferred from the viewpoint of enhancing repellent effect and water resistance, and from the viewpoint of providing a good feel when applied to the skin.

[0037] The aliphatic alcohol (a5) of component (A) may be one or more selected from monohydric linear aliphatic alcohols such as oleyl alcohol, or monohydric branched aliphatic alcohols such as butyl octanol, butyl decanol, hexyl decanol, or octyldodecanol. Among the components (a5), one or two selected from hexyldecanol and octyldodecanol are preferred from the viewpoint of enhancing repellent effect and water resistance, and from the viewpoint of providing a good feel when applied to the skin.

[0038] The polyhydric alcohol (a6) of component (A) may be one or more selected from the following: aliphatic alcohols having 2 or more carbon atoms, 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; sugar alcohols having 4 or more carbon atoms, such as sorbitol, erythritol, pentaerythritol, xylitol, and mannitol; and aromatic alcohols. Among the components (a6), one or more selected from ethylene glycol, propylene glycol, and dipropylene glycol are preferred from the viewpoint of enhancing repellent effect and water resistance, and from the viewpoint of providing a good feel when applied to the skin.

[0039] Among the components (A), from the viewpoint of enhancing the repellent effect and water resistance, and from the viewpoint of providing a good feel when applied to the skin, one or more selected from components (a1), components (a2), components (a3), and components (a4) are preferred, one or more selected from components (a1), components (a2), and components (a4) are more preferred, one or more selected from components (a1) and components (a2) are even more preferred, and component (a1) is even more preferred. Furthermore, if component (A) includes component (a6), it is preferable that it also includes one or more selected from components (a1), (a2), (a3), (a4), and (a5).

[0040] The content of component (A) in the insect repellent composition of the present invention is 13% by mass or more, preferably 20% by mass or more, more preferably 25% by mass or more, 39% by mass or less, preferably 35% by mass or less, and more preferably 33% by mass or less, from the viewpoint of enhancing the repellent effect and water resistance, providing a good feel when applied to the skin, and maintaining good storage stability.

[0041] More specifically, if component (A) contains component (a1), the content of such component (a1) in the insect repellent composition of the present invention is preferably 13% by mass or more, more preferably 20% by mass or more, even more preferably 25% by mass or more, preferably 39% by mass or less, more preferably 35% by mass or less, and even more preferably 33% by mass or less, from the same viewpoint as above. The content of component (a1) in the insect repellent composition of the present invention is preferably 13 to 39% by mass, more preferably 20 to 35% by mass, and even more preferably 25 to 33% by mass. If component (A) contains component (a2), component (a3), component (a4), or component (a5), the content of these components (a2), component (a3), component (a4), and component (a5) are all the same as the content of component (a1) above. More specifically, if component (A) contains component (a6), the content of such component (a6) in the insect repellent composition of the present invention is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, even more preferably 1% by mass or more, even more preferably 2% by mass or more, preferably 20% by mass or less, more preferably 15% by mass or less, even more preferably 10% by mass or less, and even more preferably 7% by mass or less. The content of component (a6) in the insect repellent composition of the present invention is preferably 0.1 to 20% by mass, more preferably 0.5 to 15% by mass, even more preferably 1 to 10% by mass, and even more preferably 2 to 7% by mass.

[0042] The insect repellent composition of the present invention contains, as component (B), one or more hydrophobic film-forming agents selected from a silicone-based film-forming polymer (b1) and an oil gelling agent (b2). By containing such a hydrophobic film-forming agent component (B), when applied to the skin, it not only forms a film layer on the skin while exhibiting good spreadability, but also suppresses an unpleasant sticky feeling, and even after exposure to moisture such as water or sweat, the composition remains on the skin well without causing discomfort, exhibiting excellent water resistance.

[0043] The silicone-based film-forming polymer (b1) of component (B) is a polymer having a so-called silicone structure, and may be a polymer consisting solely of a silicone structure, or it may have a silicone structure in part. If it is a polymer having a silicone structure in part, such a silicone structure may be present in the main chain of the polymer, in the side chains, or at the ends of the main chain of the polymer. Furthermore, the silicone-based film-forming polymer may be a copolymer formed by block bonds or random bonds mediated by the silicone structure.

[0044] Specifically, such component (b1) includes poly(N-acylalkyleneimine) modified silicones such as oxazoline-modified silicone; Trialkylsiloxysilicate resins such as trimethylsiloxysilicate; Fluorine-modified silicone resins such as trifluoroalkyldimethyl / trimethylsiloxysilicate; (Trimethylsiloxysilicate / Dimethiconol) crosspolymers such as Dimethicone / Vinyltrimethylsiloxysilicate Crosspolymer; Polyalkylsilsesquioxanes such as polymethylsilsesquioxane, polypropylsilsesquioxane, and alkyldimethylsilylopropylsilsesquioxane; Amodimethicone, aminoethylaminopropyldimethicone, aminopropyldimethicone, and other amino-modified silicone polymers; Phenyl-modified alkylsiloxysilicate resins such as phenylpropyldimethylsiloxysilicate and phenylpropyldimethyl / trimethylsiloxysilicate; (Meth)acrylic polymers having a dendrimer-type siloxane structure in the side chain, such as (acrylates / polytrimethylsiloxy methacrylate) copolymer; Examples include one or more (meth)acrylic-silicone graft copolymers selected from (acrylates / dimethicone) copolymer, (acrylates / ethylhexyl acrylate / dimethicone methacrylate) copolymer, (acrylates / stearyl acrylate / dimethicone methacrylate) copolymer, (acrylates / behenyl acrylate / dimethicone methacrylate) copolymer, etc.

[0045] Among the components (b1), from the viewpoint of effectively enhancing the repellent effect and water resistance, and from the viewpoint of providing a good feel when applied to the skin, one or more selected from poly(N-acylalkyleneimine) modified silicone, trialkylsiloxysilicate resin, fluorine-modified silicone resin, polyalkylsilsesquioxane, and (trimethylsiloxysilicate / dimethiconol) crosspolymer is preferred, and one or more selected from poly(N-acylalkyleneimine) modified silicone, (trimethylsiloxysilicate / dimethiconol) crosspolymer, and polyalkylsilsesquioxane is more preferred.

[0046] The oil gelling agent (b2) of component (B) can be one or more selected from sugar fatty acid ester-based oil gelling agents, glycerin fatty acid ester-based oil gelling agents, amino acid derivative-based oil gelling agents, and benzylidene sorbitol-based oil gelling agents. Examples of fatty acids constituting sugar fatty acid ester-based oil gelling agents and glycerin fatty acid ester-based oil gelling agents include saturated or unsaturated straight-chain or branched-chain fatty acids having 8 to 30 carbon atoms. The number of carbon atoms in such fatty acids is preferably 12 or more, more preferably 14 or more, even more preferably 16 or more, preferably 26 or less, more preferably 24 or less, and even more preferably 22 or less. Specific examples of such fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, behenic acid, 2-ethylhexanoic acid, and oleic acid. Among these, one or more selected from palmitic acid, stearic acid, and myristic acid are preferred.

[0047] Examples of sugar fatty acid ester-based oil gelling agents include dextrin fatty acid ester-based oil gelling agents such as dextrin myristate, dextrin palmitate, dextrin stearate, (palmitic acid / 2-ethylhexanoic acid) dextrin, and (palmitic acid / hexyldecanoic acid) dextrin; sucrose fatty acid ester-based oil gelling agents such as sucrose palmitate and sucrose stearate; inulin fatty acid ester-based oil gelling agents such as inulin stearate; and fructooligosaccharide fatty acid ester-based oil gelling agents such as fructooligosaccharide stearate and fructooligosaccharide 2-ethylhexanoic acid. Examples of glycerin fatty acid ester-based oil gelling agents include (behenate / eicosanedioic acid) glyceryl, tri(behenate / isostearate / eicosanedioic acid) glyceryl, and (behenate / eicosanedioic acid) polyglyceryl-10. Examples of amino acid derivative-based oil gelling agents include dibutyl lauroyl glutamide and dibutyl ethylhexanoyl glutamide. Examples of benzylidenesorbitol-based oil gelling agents include monobenzylidenesorbitol and dibenzylidenesorbitol.

[0048] Among the components (b2), sugar fatty acid ester-based oil gelling agents, glycerin fatty acid ester-based oil gelling agents, and amino acid derivative-based oil gelling agents are preferred from the viewpoint of effectively enhancing repellent effect and water resistance, and from the viewpoint of providing a good feel when applied to the skin, sugar fatty acid ester-based oil gelling agents are more preferred, and dextrin fatty acid ester-based oil gelling agents are even more preferred. Furthermore, it is preferable that component (B) contains at least component (b1).

[0049] The content of component (B) in the insect repellent composition of the present invention is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.5% by mass or more, even more preferably 0.8% by mass or more, preferably 7% by mass or less, more preferably 5% by mass or less, even more preferably 4% by mass or less, and even more preferably 3% by mass or less, from the viewpoint of enhancing the repellent effect and water resistance, from the viewpoint of providing a good feel when applied to the skin, and from the viewpoint of maintaining good storage stability.

[0050] The mass ratio ((A) / (B)) of the content of component (A) to the content of component (B) is preferably 3 or more, more preferably 4 or more, even more preferably 8 or more, preferably 390 or less, more preferably 300 or less, and even more preferably 180 or less, from the viewpoint of exhibiting excellent repellent effect while also enhancing water resistance, exhibiting good spreadability when applied to the skin, and having excellent usability. Furthermore, the mass ratio ((A) / (B)) of the content of component (A) to the content of component (B) is preferably 3 to 390, more preferably 4 to 300, and even more preferably 8 to 180.

[0051] More specifically, when component (A) contains component (a1), the mass ratio of the content of component (a1) to the content of component (B) ((a1) / (B)) is preferably 3 or more, more preferably 4 or more, even more preferably 8 or more, preferably 390 or less, even more preferably 300 or less, and even more preferably 180 or less, from the same viewpoint as above. Furthermore, the mass ratio of the content of component (a1) to the content of component (B) ((a1) / (B)) is preferably 3 to 390, more preferably 4 to 300, and even more preferably 8 to 180. Furthermore, if component (A) contains component (a2), component (a3), component (a4), or component (a5), the mass ratio of the content of component (a2) to the content of component (B) ((a2) / (B)), the mass ratio of the content of component (a3) ​​to the content of component (B) ((a3) / (B)), the mass ratio of the content of component (a4) to the content of component (B) ((a4) / (B)), and the mass ratio of the content of component (a5) to the content of component (B) ((a5) / (B)) are all the same as the mass ratio of the content of component (a1) to the content of component (B) ((a1) / (B)). More specifically, when component (A) contains component (a6), the mass ratio of the content of component (a6) to the content of component (B) ((a6) / (B)) is preferably 0.05 or more, more preferably 0.1 or more, even more preferably 0.25 or more, even more preferably 0.67 or more, preferably 400 or less, more preferably 150 or less, even more preferably 20 or less, and even more preferably 8.75 or less. Furthermore, the mass ratio of the content of component (a6) to the content of component (B) ((a6) / (B)) is preferably 0.05 to 400, more preferably 0.1 to 150, even more preferably 0.25 to 20, and even more preferably 0.67 to 8.75.

[0052] The insect repellent composition of the present invention contains a water-soluble thickener as component (C). By including such component (C), it is possible to not only effectively improve water resistance while enhancing the persistence of the excellent repellent effect, but also to provide excellent spreadability on the applied skin, suppress unpleasant stickiness, and provide a good moisturizing sensation. Furthermore, "water-soluble thickener" refers to a thickener whose solubility in water at 25°C is at least 0.5% by mass, that is, a thickener whose solubility in a 100% by mass saturated aqueous solution at 25°C is 0.5% by mass or more.

[0053] Component (C) may be an alkyl-modified polyacrylic acid polymer such as alkyl acrylate polymer, (acrylate / alkyl acrylate (C10-30)) copolymer, or (alkyl acrylate / steareth-20 methacrylate) copolymer; Alkyl-modified polysaccharide polymers such as stearoxy-PG hydroxyethylcellulose sulfonate sodium and laureth-13PG hydroxyethylcellulose; One or more urethane polymers selected from PEG-240 / decyltetradeceth-20 / HDI copolymers are examples. Among the components (C), from the viewpoint of exhibiting excellent spreadability and good moisturizing properties on the applied skin, one or more selected from alkyl-modified polyacrylic acid polymers and alkyl-modified polysaccharide polymers are preferred, more preferably containing at least an alkyl-modified polyacrylic acid polymer, and even more preferably using these alkyl-modified polyacrylic acid polymers and alkyl-modified polysaccharide polymers in combination.

[0054] The content of component (C) in the insect repellent composition of the present invention is preferably 0.05% by mass or more, more preferably 0.08% by mass or more, even more preferably 0.1% by mass or more, preferably 3% by mass or less, more preferably 2.5% by mass or less, even more preferably 1% by mass or less, and even more preferably 0.5% by mass or less, from the viewpoint of maintaining excellent repellent effect and water resistance while exhibiting excellent spreadability and moisturizing properties when applied to the skin.

[0055] The mass ratio ((B) / (C)) of the content of component (B) to the content of component (C) is preferably 0.03 or more, more preferably 0.1 or more, even more preferably 0.3 or more, even more preferably 0.4 or more, preferably 100 or less, more preferably 50 or less, even more preferably 30 or less, and even more preferably 20 or less, from the viewpoint of exhibiting excellent repellent effect while also enhancing water resistance, exhibiting good spreadability when applied to the skin, and having excellent usability. Furthermore, the mass ratio ((B) / (C)) of the content of component (B) to the content of component (C) is preferably 0.03 or more and 100 or less, more preferably 0.1 to 50, even more preferably 0.3 to 30, and even more preferably 0.4 to 20.

[0056] The insect repellent composition of the present invention contains water as component (D). Furthermore, from the viewpoint of maintaining good storage stability, exhibiting excellent repellent effect and water resistance, and fully demonstrating excellent spreadability and usability when applied to the skin, the insect repellent composition of the present invention is preferably an oil-in-water composition rather than an oil-in-oil composition.

[0057] The content of component (D) in the insect repellent composition of the present invention is preferably 30% by mass or more, more preferably 40% by mass or more, even more preferably 50% by mass or more, even more preferably 60% by mass or more, preferably 84.9% by mass or less, more preferably 80% by mass or less, even more preferably 75% by mass or less, and even more preferably 70% by mass or less. Furthermore, the content of component (D) in the insect repellent composition of the present invention is preferably 30% by mass or more and 84.9% by mass or less, more preferably 40 to 80% by mass, even more preferably 50 to 75% by mass, and even more preferably 60 to 70% by mass.

[0058] The mass ratio ((B) / (D)) of the content of component (B) to the content of component (D) is preferably 0.001 or more, more preferably 0.002 or more, even more preferably 0.0025 or more, preferably 0.2 or less, more preferably 0.15 or less, and even more preferably 0.1 or less, from the viewpoint of exhibiting excellent repellent effect while also enhancing water resistance, exhibiting good spreadability when applied to the skin, and having excellent usability. Furthermore, the mass ratio ((B) / (D)) of the content of component (B) to the content of component (D) is preferably 0.001 or more and 0.2 or less, more preferably 0.002 to 0.15, and even more preferably 0.0025 to 0.1.

[0059] The mass ratio ((C) / (D)) of the content of component (C) to the content of component (D) is preferably 0.0005 or more, more preferably 0.0008 or more, even more preferably 0.001 or more, preferably 0.1 or less, more preferably 0.05 or less, and even more preferably 0.03 or less, from the viewpoint of exhibiting excellent repellent effect while also enhancing water resistance, exhibiting good spreadability when applied to the skin, and having excellent usability. Furthermore, the mass ratio ((C) / (D)) of the content of component (C) to the content of component (D) is preferably 0.0005 or more and 0.1 or less, more preferably 0.0008 to 0.05, and even more preferably 0.001 to 0.03.

[0060] The insect repellent composition of the present invention preferably further contains hydrophilic fine particles (E) which have a median volume particle size of 1 μm or more and 40 μm or less, in order to provide an even better user experience when applied to the skin while maintaining good repellent effect and water resistance. The hydrophilic fine particles of component (E) refer to fine particles whose surface wetting tension at 23°C is 70 mN / m or more, and which include silica particles or silicate particles, or particles containing both silica particles and silicate particles. From the viewpoint of improving the sustained repellent effect and further enhancing the feel on the applied skin, the surface wetting tension of component (E) at 23°C is preferably 70 mN / m or more, more preferably 73 mN / m or more, and may be 100 mN / m or less, or 95 mN / m or less. The wetting tension of the particle surface at 23°C refers to the value measured by a test using a wetting tension test mixture (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.). Specifically, in a 23°C environment, 0.2 mL of wetting tension test mixture No. 70 (surface tension 70 mN / m) is first measured into a container, and then 0.01 g of the particle to be measured is gently placed into the mixture. After 30 seconds, the particle surface is visually checked to see if it has been wetted by the mixture. If it has been wetted by the No. 70 (surface tension 70 mN / m) mixture, the wetting tension of the particle surface is determined to be 70 mN / m or higher, and the particle is judged to be hydrophilic. Similarly, for example, if the particle surface does not wet when No. 25.4 (surface tension 25.4 mN / m) is used as the wetting tension test mixture, but does wet when No. 22.6 (surface tension 22.6 mN / m) is used as the wetting tension test mixture, then the wetting tension of the particle surface is determined to be 23 mN / m.

[0061] Furthermore, the shape of component (E) can be, for example, spherical, plate-like, flattened, flaky, or irregularly shaped. Among these, a spherical or flattened shape is preferred from the viewpoint of further enhancing the feel on the skin to which it is applied.

[0062] As for the silica particles that may be included in component (E), porous silica particles are preferred from the viewpoint of further enhancing the feel on the skin to which it is applied. More specifically, the silicate particles that may be included in component (E) include one or more selected from, for example, talc particles, mica particles, sericite particles, smectite particles, montmorillonite particles, bentonite particles, and kaolin particles. Among these silica particles, one or two selected from talc particles and mica particles are preferred from the viewpoint of further enhancing the feel on the skin to which it is applied.

[0063] The median volume particle size of component (E) is 1 μm or larger, preferably 2 μm or larger, more preferably 3 μm or larger, 40 μm or smaller, preferably 30 μm or smaller, more preferably 20 μm or smaller, even more preferably 15 μm or smaller, and even more preferably 12 μm or smaller, from the viewpoint of effectively improving the feel on the skin to which it is applied. Note that the median particle size by volume is the volume-based median diameter (D) determined by the particle size distribution. 50 This means that the particle size distribution is measured using a laser diffraction / scattering particle size distribution analyzer.

[0064] The total content of silica particles and silicate particles in component (E) is preferably 40% by mass or more, more preferably 60% by mass or more, even more preferably 80% by mass or more, and more preferably 100% by mass, from the viewpoint of effectively improving the feel on the applied skin.

[0065] The content of component (E) in the insect repellent composition of the present invention is preferably 0.5% by mass or more, more preferably 1% by mass or more, even more preferably 2% by mass or more, preferably 35% by mass or less, more preferably 25% by mass or less, and even more preferably 10% by mass or less. Furthermore, the content of component (E) in the insect repellent composition of the present invention is preferably 0.5% by mass or more and 35% by mass or less, more preferably 1 to 25% by mass, and even more preferably 2 to 10% by mass.

[0066] The mass ratio ((E) / (A)) of the content of component (E) to the content of component (A) is preferably 0.01 or more, more preferably 0.02 or more, even more preferably 0.03 or more, preferably 2.5 or less, more preferably 2 or less, and even more preferably 1.5 or less, from the viewpoint of exhibiting excellent repellent effect while also enhancing water resistance, exhibiting good spreadability when applied to the skin, and having excellent usability. Furthermore, the mass ratio ((E) / (A)) of the content of component (E) to the content of component (A) is preferably 0.01 or more and 2.5 or less, more preferably 0.02 to 2, and even more preferably 0.03 to 1.5.

[0067] More specifically, when component (A) contains component (a1), the mass ratio of the content of component (E) to the content of component (a1) ((E) / (a1)) is preferably 0.01 or more, more preferably 0.02 or more, even more preferably 0.03 or more, preferably 2.5 or less, even more preferably 2 or less, and even more preferably 1.5 or less, from the same viewpoint as above. Furthermore, the mass ratio of the content of component (E) to the content of component (a1) ((E) / (a1)) is preferably 0.01 to 2.5, more preferably 0.02 to 2, and even more preferably 0.03 to 1.5. Furthermore, if component (A) contains component (a2), component (a3), component (a4), or component (a5), the mass ratio of the content of component (E) to the content of component (a2) ((E) / (a2)), the mass ratio of the content of component (E) to the content of component (a3) ​​((E) / (a3)), the mass ratio of the content of component (E) to the content of component (a4) ((E) / (a4)), and the mass ratio of the content of component (E) to the content of component (a5) ((E) / (a5)) are all the same as the mass ratio of the content of component (E) to the content of component (a1) ((E) / (a1)). More specifically, when component (A) contains component (a6), the mass ratio ((E) / (a6)) of the content of component (E) to the content of component (a6) is preferably 0.025 or more, more preferably 0.05 or more, even more preferably 0.15 or more, preferably 100 or less, more preferably 70 or less, and even more preferably 30 or less. Furthermore, the mass ratio ((E) / (a6)) of the content of component (E) to the content of component (a6) is preferably 0.025 to 100, more preferably 0.05 to 70, and even more preferably 0.15 to 30.

[0068] The mass ratio ((E) / (B)) of the content of component (E) to the content of component (B) is preferably 0.1 or more, more preferably 0.25 or more, even more preferably 0.8 or more, preferably 350 or less, more preferably 150 or less, and even more preferably 50 or less, from the viewpoint of exhibiting excellent repellent effect while also enhancing water resistance, exhibiting good spreadability when applied to the skin, and having excellent usability. Furthermore, the mass ratio ((E) / (B)) of the content of component (E) to the content of component (B) is preferably 0.1 or more and 350 or less, more preferably 0.25 to 150, and even more preferably 0.8 to 50.

[0069] The mass ratio ((E) / (C)) of the content of component (E) to the content of component (C) is preferably 0.1 or more, more preferably 0.25 or more, even more preferably 0.5 or more, preferably 350 or less, more preferably 150 or less, even more preferably 15 or less, and even more preferably 10 or less, from the viewpoint of exhibiting excellent repellent effect while also enhancing water resistance, exhibiting good spreadability when applied to the skin, and having excellent usability. Furthermore, the mass ratio ((E) / (C)) of the content of component (E) to the content of component (C) is preferably 0.1 or more to 350 or less, more preferably 0.25 to 150, even more preferably 0.5 to 15, and even more preferably 0.5 to 10.

[0070] The mass ratio ((E) / (D)) of the content of component (E) to the content of component (D) is preferably 0.005 or more, more preferably 0.01 or more, even more preferably 0.02 or more, preferably 1.5 or less, more preferably 1.0 or less, and even more preferably 0.5 or less, from the viewpoint of exhibiting excellent repellent effect while also enhancing water resistance, exhibiting good spreadability when applied to the skin, and having excellent usability. Furthermore, the mass ratio ((E) / (D)) of the content of component (E) to the content of component (D) is preferably 0.005 or more and 1.5 or less, more preferably 0.01 to 1.0, and even more preferably 0.02 to 0.5.

[0071] The insect repellent composition of the present invention preferably contains a surfactant in order to properly disperse each component and fully exhibit the desired effects such as repellent effect, water resistance, and spreadability and feel when applied to the skin. Examples of such surfactants include anionic surfactants, nonionic surfactants, and amphoteric surfactants.

[0072] Anionic surfactants specifically include one or more selected from alkyl sulfate esters such as lauryl sulfate and myristyl sulfate; N-acyl glutamates such as N-lauroyl glutamate, N-myristoyl glutamate and N-palmitoyl glutamate; N-acyl sarcosine salts such as N-lauroyl sarcosine salt and N-myristoyl sarcosine salt; N-acyl taurine salts such as N-lauroyl taurine salt and N-myristoyl taurine salt; N-acyl amino acid salts such as N-methyl acyl taurine salt and N-stearoyl methyl taurine salt; alkyl phosphates such as lauryl phosphate; polyoxyethylene monoalkyl phosphates; fatty acids such as coconut oil fatty acid, myristic acid, and lauric acid, or salts thereof; higher fatty acid sulfonated monoglyceride salts; and fatty acid ester salts of isethionic acid.

[0073] Among such surfactants, one or more selected from anionic surfactants and nonionic surfactants are preferred, anionic surfactants are more preferred, one or two selected from N-acyl amino acid salts and alkyl sulfate ester salts are even more preferred, and N-acyl amino acid salts are even more preferred.

[0074] From the viewpoint of fully exhibiting the repellent effect, water resistance, and spreadability and feel when applied to the skin, the surfactant content in the insect repellent composition of the present invention is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.08% by mass or more, preferably 0.5% by mass or less, more preferably 0.3% by mass or less, and even more preferably 0.2% by mass or less. Furthermore, the surfactant content in the insect repellent composition of the present invention is preferably 0.01 to 0.5% by mass, more preferably 0.05 to 0.3% by mass, and even more preferably 0.08 to 0.2% by mass.

[0075] The insect repellent composition of the present invention may contain, to the extent that it does not inhibit the effects of the present invention, other components such as humectants, pH adjusters, antioxidants, preservatives, ultraviolet absorbers, various other medicinal components, fragrances, colorants, etc. Furthermore, in order to fully exhibit the repellent effect, water resistance, and spreadability and feel when applied to the skin, it is preferable to limit the content of repellent active ingredients other than component (A) in the insect repellent composition of the present invention. Other effective repellent ingredients besides component (A) include, specifically, one or more selected from DEET (N,N-diethyltoluamide), Icaridin (1-methylpropyl-2-(2-hydroxyethyl)-1-piperidine carboxylate), and IR3535 (3-(acetylbutyl)aminopropionate ethyl ester), etc. The content of repellent active ingredients other than component (A) in the insect repellent composition of the present invention is preferably 13% by mass or less, more preferably 10% by mass or less, even more preferably 5% by mass or less, even more preferably 4% by mass or less, even more preferably 3% by mass or less, even more preferably 1% by mass or less, and even more preferably 0.1% by mass or less, or it is preferable that the insect repellent composition of the present invention does not contain any repellent active ingredients other than component (A).

[0076] The insect repellent composition of the present invention is suitable for use as a topical skin preparation for application to the skin of animals such as humans. Examples of such topical skin preparations include topical pharmaceuticals and quasi-drugs such as ointments and creams, and skin cosmetics such as lotions and emulsions. The form of the insect repellent composition of the present invention may be appropriately selected from liquids, creams, lotions, emulsions, gels, ointments, etc., depending on the intended use.

[0077] The insect repellent composition of the present invention can be manufactured by conventional methods. For example, a mixture of a portion of component (A) and component (D) can be prepared in advance, a mixture of a portion of component (A) and component (C) can be added to this mixture, and then a mixture of the remaining portion of component (A) and component (B), which has been prepared separately, can be added to manufacture the insect repellent composition of the present invention.

[0078] With regard to the embodiments described above, the present invention further discloses the following insect repellent compositions. [1] The following components (A) to (D): (A) One or more non-volatile liquid oils selected from silicone oils, ester oils, ether oils, hydrocarbon oils, aliphatic alcohols, and polyhydric alcohols, in an amount of 13% to 39% by mass. (B) One or more hydrophobic film-forming agents selected from silicone-based film-forming polymers and oil gelling agents. (C) Water-soluble thickener (D)Water A pest repellent composition containing the following: [2] The insect repellent composition of [1] above, wherein the silicone oil (a1) of component (A) is preferably one or more selected from dimethylpolysiloxane, dimethiconol, methylphenylpolysiloxane, and modified silicone, more preferably one or two selected from dimethylpolysiloxane and dimethiconol, even more preferably dimethylpolysiloxane, and even more preferably linear dimethylpolysiloxane. [3] The insect repellent composition according to [1] or [2] above, wherein the ester oil (a2) of component (A) is one or more selected from ester oils (a2-1) having a linear or branched alkyl or alkenyl group having 1 to 23 carbon atoms, or an aromatic hydrocarbon group, dialkyl carbonate compounds (a2-2) having one or more alkyl or alkenyl groups having 6 to 22 carbon atoms and which may have an ethyleneoxy group added, and other ester oils (a2-3). [4] The insect repellent composition according to any one of the above [1] to [3], wherein the hydrocarbon oil (a4) of component (A) is one or more selected from liquid paraffin, liquid isoparaffin, squalane, isohexadecane, isoeicosane, hydrogenated polyisobutene, light liquid isoparaffin, heavy liquid isoparaffin, α-olefin oligomer, and cycloparaffin. [5] The insect repellent composition according to any one of the above [1] to [4], wherein the aliphatic alcohol (a5) of component (A) is one or more selected from monovalent linear aliphatic alcohols such as oleyl alcohol; and monovalent branched aliphatic alcohols such as butyl octanol, butyl decanol, hexyl decanol, and octyldodecanol. [6] Component (A) is preferably one or more selected from component (a1), component (a2), component (a3), and component (a4), more preferably one or more selected from component (a1), component (a2), and component (a4), even more preferably one or more selected from component (a1) and component (a2), and even more preferably component (a1), the insect repellent composition of any one of the above [1] to [5]. [7] The insect repellent composition according to any one of [1] to [6] above, wherein the content of component (A) is preferably 20% by mass or more, more preferably 25% by mass or more, preferably 35% by mass or less, and more preferably 33% by mass or less.

[0079] [8] The silicone film-forming polymer (b1) of component (B) is preferably one or more selected from poly(N-acylalkyleneimine) modified silicone, trialkylsiloxysilicate resin, fluorine-modified silicone resin, polyalkylsilsesquioxane, and (trimethylsiloxysilicate / dimethiconol) crosspolymer, and more preferably one or more selected from poly(N-acylalkyleneimine) modified silicone, (trimethylsiloxysilicate / dimethiconol) crosspolymer, and polyalkylsilsesquioxane, according to any one of the above [1] to [7]. [9] The insect repellent composition according to any one of the above [1] to [8], wherein the oil gelling agent (b2) of component (B) is one or more selected from sugar fatty acid ester oil gelling agents, glycerin fatty acid ester oil gelling agents, amino acid derivative oil gelling agents, and benzylidene sorbitol oil gelling agents, wherein sugar fatty acid ester oil gelling agents, glycerin fatty acid ester oil gelling agents, and amino acid derivative oil gelling agents are preferred, sugar fatty acid ester oil gelling agents are more preferred, and dextrin fatty acid ester oil gelling agents are even more preferred.

[10] A pest repellent composition according to any one of the above [1] to [9], preferably containing at least component (b1) as component (B).

[11] The insect repellent composition according to any one of [1] to

[10] above, wherein the content of component (B) is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.5% by mass or more, even more preferably 0.8% by mass or more, preferably 7% by mass or less, more preferably 5% by mass or less, even more preferably 4% by mass or less, and even more preferably 3% by mass or less.

[0080]

[12] The insect repellent composition according to any one of the above [1] to

[11] , wherein component (C) is one or more selected from alkyl-modified polyacrylic acid polymers, alkyl-modified polysaccharide polymers, and urethane polymers, and preferably one or more selected from alkyl-modified polyacrylic acid polymers and alkyl-modified polysaccharide polymers, more preferably containing at least an alkyl-modified polyacrylic acid polymer, and even more preferably using these alkyl-modified polyacrylic acid polymers and alkyl-modified polysaccharide polymers in combination.

[13] The insect repellent composition according to any one of [1] to

[12] above, wherein the content of component (C) is preferably 0.05% by mass or more, more preferably 0.08% by mass or more, even more preferably 0.1% by mass or more, preferably 3% by mass or less, more preferably 2.5% by mass or less, even more preferably 1% by mass or less, and even more preferably 0.5% by mass or less.

[0081]

[14] The insect repellent composition according to any one of the above [1] to

[13] , wherein the content of component (D) is preferably 30% by mass or more, more preferably 40% by mass or more, even more preferably 50% by mass or more, even more preferably 60% by mass or more, preferably 84.85% by mass or less, more preferably 80% by mass or less, even more preferably 75% by mass or less, and even more preferably 70% by mass or less.

[15] Any one of the above [1] to

[14] insect repellent compositions wherein the mass ratio ((A) / (B)) of the content of component (A) to the content of component (B) is preferably 3 or more, more preferably 4 or more, even more preferably 7 or more, preferably 390 or less, more preferably 300 or less, and even more preferably 180 or less.

[16] The insect repellent composition according to any one of the above [1] to

[15] , wherein the mass ratio ((B) / (C)) of the content of component (B) to the content of component (C) is preferably 0.03 or more, more preferably 0.1 or more, even more preferably 0.3 or more, even more preferably 0.4 or more, preferably 100 or less, more preferably 50 or less, even more preferably 30 or less, and even more preferably 20 or less.

[17] Any one of the above [1] to

[16] insect repellent compositions, wherein the mass ratio ((B) / (D)) of the content of component (B) to the content of component (D) is preferably 0.001 or more, more preferably 0.002 or more, even more preferably 0.003 or more, preferably 0.2 or less, more preferably 0.15 or less, and even more preferably 0.08 or less.

[18] Any one of the above [1] to

[17] insect repellent compositions, wherein the mass ratio ((C) / (D)) of the content of component (C) to the content of component (D) is preferably 0.0005 or more, more preferably 0.0008 or more, even more preferably 0.001 or more, preferably 0.1 or less, more preferably 0.05 or less, and even more preferably 0.03 or less.

[0082]

[19] The insect repellent composition according to any one of the above [1] to

[18] , further comprising silica particles and / or silicate particles, and containing hydrophilic fine particles (E) having a median volume particle size of 1 μm or more and 40 μm or less, wherein the total content of silica particles and silicate particles in component (E) is preferably 40% by mass or more, more preferably 60% by mass or more, even more preferably 80% by mass or more, and more preferably 100% by mass.

[20] The insect repellent composition according to

[19] above, wherein the content of component (E) is preferably 0.5% by mass or more, more preferably 1% by mass or more, even more preferably 2% by mass or more, preferably 35% by mass or less, more preferably 25% by mass or less, and even more preferably 10% by mass or less.

[21] The insect repellent composition according to

[19] or

[20] above, wherein the mass ratio ((E) / (A)) of the content of component (E) to the content of component (A) is preferably 0.01 or more, more preferably 0.02 or more, even more preferably 0.03 or more, preferably 2.5 or less, more preferably 2 or less, and even more preferably 1.5 or less.

[22] The insect repellent composition according to any one of the above

[19] to

[21] , wherein the mass ratio ((E) / (B)) of the content of component (E) to the content of component (B) is preferably 0.1 or more, more preferably 0.25 or more, even more preferably 0.8 or more, preferably 350 or less, more preferably 150 or less, and even more preferably 50 or less.

[23] Any one of the above

[19] to

[22] insect repellent compositions, wherein the mass ratio ((E) / (C)) of the content of component (E) to the content of component (C) is preferably 0.1 or more, more preferably 0.25 or more, even more preferably 0.5 or more, preferably 350 or less, more preferably 150 or less, even more preferably 15 or less, and even more preferably 10 or less.

[24] Any one of the above

[19] to

[23] insect repellent compositions, wherein the mass ratio ((E) / (D)) of the content of component (E) to the content of component (D) is preferably 0.005 or more, more preferably 0.01 or more, even more preferably 0.02 or more, preferably 1.5 or less, more preferably 1.0 or less, and even more preferably 0.5 or less.

[0083]

[25] The insect repellent composition of the present invention preferably contains no insect repellent active ingredients other than component (A), which is preferable to any one of the above [1] to

[24] . [Examples]

[0084] The present invention will be described in detail below based on examples. Unless otherwise specified in the table, the content of each component is expressed in mass percent.

[0085] [Examples 1-11, Comparative Examples 1-3] Preparation of the composition Each composition was prepared according to the formulations shown in Tables 1-4. Specifically, component (D) and sodium stearolylmethyltaurate were placed in glass beaker X, and the aqueous phase was prepared by dissolving them with propeller stirring while heating with 90°C hot water. Then, after cooling to room temperature (25-28°C) by air cooling, a portion of component (A) was added. Next, a portion of component (A) was added to glass beaker Y, followed by the addition of component (C), and the mixture was stirred with a spatula. This mixture was then added to glass beaker X while stirring with a propeller, and finally component (E) was added.

[0086] Furthermore, the remaining portion of component (A) was added to glass beaker Z, followed by the addition of component (B), and the mixture was stirred with a stirrer. This mixture was then added to glass beaker X while stirring with a propeller. Next, potassium hydroxide was added and pre-emulsified by stirring with a propeller. Then, the stirring section of the TK Robomix (manufactured by Tokushu Kika Kogyo Co., Ltd.) was replaced with a TK Homomixer MARK II 2.5 (manufactured by Primix Co., Ltd.), and the mixture was stirred at 8,000 rpm for 3 minutes to obtain the composition. Each of the obtained compositions was evaluated according to the following method. The results are shown in Tables 1-4.

[0087] Evaluation of the spreadability of the composition when applied to the skin, and the feeling of moisture and stickiness on the skin surface after application. The evaluation was conducted by three expert panelists. First, 0.02 mL of each composition was applied to the skin on the inner side of the forearm in a 3 cm diameter circle, and then spread evenly over 1 minute under conditions of 25°C and 57% relative humidity (RH). The ease of spreading the composition was evaluated according to the following criteria, with Comparative Example 3 receiving a rating of "1," and the average value from the three panelists was used as an index for evaluating the "spreadability of the composition." Next, after applying the composition to the skin, a sensory evaluation was conducted according to the following criteria, with Comparative Example 3 rated as "1" for "moisture sensation on the skin surface" and "stickiness on the skin surface" from the beginning of drying to after drying. The average value from the three participants was then used as the evaluation index.

[0088] • Spreadability of the composition 5: It has a light and stretchy feel. 4: There is a slight resistance, but it has a sufficiently smooth and stretchy feel. 3: There is some resistance, but the feeling of good elasticity is stronger. 2: There is resistance, and the stretchy feel is weak. 1: It feels resistant and doesn't have a smooth, stretchy feel. • Moisture on the skin surface 5: It has a fresh, moisturizing feel, yet it also feels refreshing. 4: While it provides a sufficiently moisturizing and refreshing feel, it's slightly lacking in a refreshing sensation. 3: While it has a fresh and moisturizing feel, it lacks a refreshing sensation. 2: It doesn't provide a refreshing or moisturizing feel. 1: It doesn't feel moisturizing or refreshing. • Stickiness on the skin surface 5: It has absolutely no sticky feeling and a pleasant, smooth texture. 4: It feels slightly sticky, but has a smooth texture. 3: It feels slightly sticky, but the smooth, dry feeling is stronger. 2: It feels sticky and lacks a smooth, dry feel. 1: It feels sticky and doesn't have a smooth, dry feel.

[0089] Evaluation of stickiness on the skin surface after bathing The evaluation was conducted by three expert panelists. First, 0.02 mL of each composition was applied to the skin on the inner side of the forearm in a 3 cm diameter circle, and then spread evenly over 1 minute under conditions of 25°C and 57% relative humidity (RH). Next, the forearm was immersed in a water bath adjusted to 25°C for 30 seconds, and then air-dried. After drying, the "stickiness on the skin surface" was evaluated according to the following criteria, with Comparative Example 3 rated as "1," and the average value from the three panelists was used as the evaluation index. 5: It has absolutely no sticky feeling and a pleasant, smooth texture. 4: It feels slightly sticky, but has a smooth texture. 3: It feels slightly sticky, but the smooth, dry feeling is stronger. 2: It feels sticky and lacks a smooth, dry feel. 1: It feels sticky and doesn't have a smooth, dry feel.

[0090] Evaluation of the persistence (water resistance) of the repellent effect after bathing. The evaluation was carried out according to the following steps (I) to (III). (I) Preparation for pest control (Aedes albopictus) Aedes albopictus eggs (manufactured by Sumitomo Techno Service) were reared in cages under conditions of 27°C and 60% relative humidity (RH), and adult Aedes albopictus (females) were collected. Specifically, after filling a transparent plastic pan with about 1 cm of water, filter paper on which the eggs were laid was placed to induce pupation. The pupae were then fed tropical fish food (TetraMin) as larval food. After one week, the pupae were collected with a dropper, transferred to 20 mL plastic cups, and placed in a cage with a mesh net. The pupae were then fed 10% sucrose in a 25 mL plastic tube as adult food, and pupation was induced. The emerged males and females were reared in the same cage for 5 days to allow mating. Afterward, the adults were collected using an aspirator, anesthetized by exposing them to ice for 5 minutes, and then only female mosquitoes were collected visually for the evaluation described below.

[0091] (II) Preparation for the start of the exam Fifty mated female mosquitoes collected in (I) were placed in a mesh-enclosed plastic cage (BugDorm-1 cage, size: 30cm x 30cm x 30cm), and the test was conducted under conditions of 25°C and 60% relative humidity (RH). Specifically, a 3cm x 3cm slit was first made in a silicone sleeve, and the subject's arm was inserted. To activate the mosquitoes, air was blown into the plastic cage for 5 seconds. Next, the arm was inserted into the plastic cage without applying anything to the exposed skin through the slit in the silicone sleeve. Within 3 minutes of inserting the arm, it was confirmed that mosquitoes landed in two places on the exposed skin and remained there for more than 1 second. If a landed mosquito did not remain for more than 1 second, another mosquito was reintroduced into the plastic cage, and preparations for the measurement test were made.

[0092] (III) Measurement of the duration of the repellent effect In measuring the duration of the repellent effect, if a mosquito landed on an exposed area of ​​skin and remained there for 3 seconds or more, it was determined that the mosquito had not been repelled and that "mosquitoes had lingered." First, a 3cm x 3cm slit is made in the silicone sleeve, and the subject's arm is inserted. 3.3 mg / cm³ is then applied to the exposed skin area (3cm x 3cm) through the slit. 2 Each composition was applied evenly. The forearm was then immersed in a water bath adjusted to 25°C for 20 minutes, followed by air drying in the air, and then air was blown into a plastic cage for 5 seconds to allow for mosquito activation. Next, the forearm coated with the composition was inserted into a plastic cage to begin the first test. The number of mosquitoes that remained in the cage was counted within 3 minutes of the start, and the first test ended when two mosquitoes had remained in the cage. The next test began 30 minutes after the start of the first test, and the same test was repeated as needed multiple times. In tests where the start time was 30 minutes after the initial test began, if the first instance of mosquito retention being observed twice was determined to be "0 minutes". Similarly, in tests where the start time was 60 minutes after the initial test began, if the first instance of mosquito retention being observed twice was determined to be "30 minutes". This test was conducted with three subjects, and the average duration of the repellent effect (in minutes) was calculated and used as an indicator for evaluating the "persistence of the repellent effect after bathing (water resistance)." In Comparative Examples 2 and 3, the evaluation of the spreadability of the composition when applied to the skin, as well as the evaluation of the moisturizing and sticky feeling on the skin surface after application and after bathing, were unsatisfactory. Therefore, the persistence of the repellent effect (water resistance) after bathing was not evaluated.

[0093] Evaluation of the removal efficiency of the composition by washing. The evaluation was conducted by three expert panelists. First, 0.02 mL of each composition was applied to the skin on the inner side of the forearm in a 3 cm diameter circle and spread evenly over 1 minute under conditions of 25°C and 57% relative humidity (RH). Next, one pump of commercially available hand soap was taken into the hand, and the hand and forearm were rubbed for 10 seconds, followed by rinsing with running water for 10 seconds. The feeling of residue of the composition on the skin after washing was evaluated according to the following criteria, with Comparative Example 3 rated as "1," and the average value from the three participants was calculated and used as an index for evaluating "removability of the composition by washing." 5: There was absolutely no residue from the composition, and it felt great on the skin. 4: Although there was a slight residue of the composition, it felt good on the skin. 3: Although there was a slight residue of the composition, it felt good on the skin. 2: The composition left a lingering residue and was insufficient to provide a good, natural skin feel. 1: The composition leaves a lingering residue and does not provide a good, natural skin feel.

[0094] 《Evaluation of storage stability》 Each composition was placed in a 100 mL glass bottle, sealed, and stored at 25°C for one day. After storage, the state of the oil phase in the composition was visually inspected according to the following criteria and used as an indicator for evaluating "storage stability." A: No change (no separation or coalescence of the oil phase, no adhesion of the composition to the glass bottle surface, and no seepage from the emulsion to the surface). B: Oil phase seepage is observed, but no adhering of the composition to the glass bottle surface in contact with the oil phase. C: The oil phase has merged, some seepage from the emulsion to the surface is observed, and further adhesion of the composition to the surface of the glass bottle is also observed. D: Separation of the oil phase is observed.

[0095] [Table 1]

[0096] [Table 2]

[0097] [Table 3]

[0098] [Table 4]

[0099] *1: KF-96A-10cs, surface tension: 20.1 mN / m, manufactured by Shin-Etsu Chemical Co., Ltd. *2: Surface tension: 27.2mN / m *3: Surface tension: 29.3mN / m *4: Polysilicone-9, manufactured by Kao Corporation. *5: X-21-5250L, manufactured by Shin-Etsu Chemical Co., Ltd. *6: XS66-B8226, manufactured by Momentive Performance Materials Japan Co., Ltd. *7: BELSIL REG 1103B, manufactured by Wacker Chemical Corporation. *8: SW-8005 C30 Resin Wax, manufactured by Dow Chemical Japan / Dow Toray. *9: Leopard KL2, manufactured by Chiba Flour Milling Co., Ltd. *10: Pemlen TR-1, manufactured by Lubrizol Corporation *11: HCS 160M5, mid-volume particle size: 5μm, manufactured by JGC Catalysts & Chemicals Co., Ltd.

[0100] Table 5 shows examples of formulations for the insect repellent composition of the present invention.

[0101] [Table 5]

Claims

1. The following components (A) to (D): (A) One or more non-volatile liquid oils selected from silicone oils, ester oils, ether oils, hydrocarbon oils, aliphatic alcohols, and polyhydric alcohols: 13% to 39% by mass (B) One or more hydrophobic film-forming agents selected from silicone-based film-forming polymers and oil gelling agents. (C) Water-soluble thickener (D) Water A pest repellent composition containing the following:

2. The insect repellent composition according to claim 1, wherein the mass ratio ((B) / (C)) of the content of component (B) to the content of component (C) is 0.03 or more and 100 or less.

3. The insect repellent composition according to claim 1 or 2, wherein the content of component (B) is 0.05% by mass or more and 7% by mass or less.

4. The insect repellent composition according to claim 1 or 2, wherein the content of component (D) is 30% by mass or more and 84.9% by mass or less.

5. The insect repellent composition according to claim 1 or 2, wherein component (C) is one or more selected from alkyl-modified polyacrylic acid polymers, alkyl-modified polysaccharide polymers, and urethane polymers.

6. Furthermore, the insect repellent composition according to claim 1 or 2, further comprising hydrophilic fine particles (E) which include silica particles and / or silicate particles and have a median volume particle size of 1 μm or more and 40 μm or less.

7. The insect repellent composition according to claim 6, wherein the content of component (E) is 0.5% by mass or more and 35% by mass or less.

Images