Insect pest repellent composition

Abstract

To provide an insect pest repellent composition and a method for repelling insect pests which have an improved sustained repellent effect against insect pests.SOLUTION: [1] An insect pest repellent composition contains a silicone compound (A), where the ratio of the shear viscosity ηHigh at a shear rate of 102 s-1 to the shear viscosity ηLow at a shear rate of 10-1 s-1 (ηHigh / ηLow) is 0.9 or less, the shear viscosity ηHigh is 450 mPa s or less, and the shear viscosity ηLow is 150 mPa s or more, as measured by a method using a rheometer. [2] A method for repelling insect pests includes a step of applying the insect pest repellent composition described in [1] to a skin surface.SELECTED DRAWING: None

Description

[Technical field]

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

[0002] Pests, for example, flying pests such as mosquitoes and flies, are factors that transmit pathogens to humans and other animals, causing infectious diseases and dermatitis. In particular, some mosquitoes are insects that are extremely harmful from a hygienic standpoint, since 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 widely used, such as spraying insecticides or applying repellents to the skin surface, with DEET (N,N-diethyltoluamide) being a typical example of a repellent.

[0003] Pests such as mosquitoes have 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 enable them 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 of DEET is required to maintain a long-lasting repellent effect. Furthermore, it is known to cause allergies and rough skin in some people, so there is a problem that the amount and frequency of use is limited for young children and people with sensitive skin.

[0004] Therefore, the use of natural essential oils as repellent ingredients has been considered. 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 not sufficient, and there are problems with their practicality.

[0005] Various other proposals have been made so far regarding repellents and repellent compositions for pests. Patent Document 1 describes a pest repellent composition that contains 40% by mass or more and 99.5% by mass or less of 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, and that have a surface tension of 40 mN / m or less at 25°C and a viscosity of 400 mPa s or less at 23°C measured with a B-type rotational viscometer, and 0.5% by mass or more and 15% by mass or less of a film-forming polymer.

[0006] Patent Document 2 describes a skin protective agent comprising a combination of fluorine-polyether-co-modified silicone and an insect repellent component. Patent Document 3 describes an emulsion containing one or more silicone derivatives having a side chain represented by a specific formula, an oily component, and water.

[0007] Patent Document 4 describes a cosmetic composition comprising: (a) an active cosmetic material that can be selected from a deodorant active material, a deodorant active material, an antiperspirant active material, a sunscreen material, an insect repellent or repellent, and an antibacterial agent, in an amount sufficient to exert a functional effect; and (b) a silicone gel material having the active cosmetic material, the silicone gel material comprising an organopolysiloxane material contained in the cosmetic composition in an amount sufficient to provide a solid cosmetic composition, and a volatile silicone material contained in the cosmetic composition in an amount that allows the organopolysiloxane material to form a gel. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2020-109078 A [Patent Document 2] Japanese Patent Application Publication No. 8-59447 [Patent Document 3] JP 2014-73971 A [Patent Document 4] Special Publication No. 2000-511184 Summary of the Invention [Problem to be solved by the invention]

[0009] Among pest repellents, those that are applied to the skin are desired to have not only an initial pest repellent effect but also excellent durability of the repellent effect. The present invention relates to a pest repellent composition having an improved sustained repellent effect against pests. [Means for solving the problem]

[0010] The present invention relates to the following [1] and [2]. [1] A pest repellent composition comprising a silicone compound (A), Using a rheometer, the following method 1 was used: -1 s -1 Shear viscosity η Low Shear rate 10 2 s -1 Shear viscosity η High The ratio (η High / η Low ) is 0.9 or less, and the shear viscosity η High is 450 mPa s or less, and the shear viscosity η Low A pest repellent composition having a viscosity of 150 mPa·s or more. (Method 1) Using a cone plate (diameter 50 mm, angle 0.1 rad), 25°C, shear rate range: 10 -3 ~10 3 s -1 Measure the shear viscosity (mPa s) under the following conditions: Distance between plates: 1 mm [2] A method for repelling pests, comprising the step of applying the pest repellent composition described in [1] above to a skin surface. Effect of the Invention

[0011] According to the present invention, it is possible to provide a pest repellent composition and a pest repellent method having an improved sustained repellent effect against pests. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] [Pest repellent composition] The pest repellent composition of the present invention (hereinafter also referred to as "the composition of the present invention") is a pest repellent composition containing a silicone compound (A) (hereinafter also referred to as "component (A)"). -1 s -1 Shear viscosity η Low Shear rate 10 2 s -1 Shear viscosity η High The ratio (η High / η Low ) is 0.9 or less, and the shear viscosity η High is 450 mPa s or less, and the shear viscosity η Low is 150 mPa s or more. (Method 1) Using a cone plate (diameter 50 mm, angle 0.1 rad), 25°C, shear rate range: 10 -3 ~10 3 s -1 Measure the shear viscosity (mPa s) under the following conditions: Plate distance: 1 mm.

[0013] The composition of the present invention is a composition that has an improved and sustained repellent effect against pests, particularly flying pests. The composition of the present invention is not particularly limited, but is more effective when applied to the skin.

[0014] In the present invention, the "repellent effect against pests" includes the effect of pests coming into contact with the target object not remaining there but immediately leaving (retention inhibitory effect), and may further include one or more of keeping pests away from the target object and exterminating pests. In the present invention, the "long-lasting repellent effect against pests" means that the repellent effect continues even after the composition of the present invention is applied to an object. In this embodiment, the "repellent effect against pests" is also simply referred to as the "repellent effect", and the lasting repellent effect against pests is also simply referred to as the "lasting repellent effect".

[0015] The reason why the composition of the present invention has an improved sustained repellent effect against pests, particularly flying pests, is not clear, but is thought to be as follows. First, when pests get wet, they have the tendency to avoid staying on the surface where their legs get wet, in order to avoid the attractive force generated from the landing surface. The legs of insects such as mosquitoes are hydrophobic, so the affinity between the composition containing the silicone compound and the legs of pests is high, and when the legs get wet, it is believed that they avoid the attractive force generated from the landing surface and fly away without staying at the landing point. Here, it is considered that the lower the viscosity of the pest repellent composition in the high shear region, the larger the contact area between the pest and the leg becomes in a short time when the pest comes into contact with the pest repellent composition, and the pest does not land or flies away immediately, for example, within 1 second, even if it does land. High It is believed that the lower the value, the more effective the repellent effect against pests. In addition, compositions containing silicone compounds generally have high affinity with the skin, and the composition spreads on the skin in a short time, so that the repellent effect is likely to decrease. However, if the viscosity of the pest repellent composition in the low shear region is high, the movement of the composition on the skin can be suppressed, so that the shear viscosity η Low It is believed that the higher the surface area, the more the pest repellent composition can be prevented from spreading on the skin. From the above, η High / η Low , shear viscosity η High and shear viscosity η Low By setting the amount of the repellent composition within the above range, it is possible to prevent the pest repellent composition from spreading on the skin while maintaining a good pest repellent effect, thereby improving the sustained pest repellent effect.

[0016] In the composition of the present invention, the η High / η Lowis 0.9 or less, but from the viewpoint of further improving the repellent effect and the sustained repellent effect, it is preferably 0.8 or less, more preferably 0.7 or less, even more preferably 0.6 or less, even more preferably 0.55 or less, even more preferably 0.5 or less, even more preferably 0.45 or less, even more preferably 0.35 or less, and even more preferably 0.25 or less, and from the same viewpoint, it is preferably 0.01 or more, more preferably 0.03 or more, even more preferably 0.05 or more, even more preferably 0.08 or more, and even more preferably 0.10 or more.

[0017] In the composition of the present invention, the shear viscosity η High is 450 mPa·s or less, but from the viewpoint of improving the resistance to leakage and spreading when applied to the skin and from the viewpoint of further improving the repellent effect and the sustained repellent effect, it is preferably 430 mPa·s or less, more preferably 400 mPa·s or less, even more preferably 390 mPa·s or less, even more preferably 370 mPa·s or less, even more preferably 345 mPa·s or less, even more preferably 320 mPa·s or less, even more preferably 295 mPa·s or less, even more preferably 280 mPa·s or less, even more preferably 250 mPa·s or less, and even more preferably 150 mPa·s or less, and from the same viewpoints, it is preferably 50 mPa·s or more, more preferably 80 mPa·s or more, and even more preferably 100 mPa·s or more.

[0018] In the composition of the present invention, the shear viscosity η LowThe viscosity of the composition is 150 mPa·s or more, but from the viewpoint of improving the resistance to leakage and spreading when applied to the skin and from the viewpoint of further improving the repellent effect and the sustained repellent effect, it is preferably 250 mPa·s or more, more preferably 350 mPa·s or more, even more preferably 450 mPa·s or more, even more preferably 480 mPa·s or more, even more preferably 500 mPa·s or more, even more preferably 515 mPa·s or more, even more preferably 540 mPa·s or more, even more preferably 580 mPa·s or more, even more preferably 620 mPa·s or more. Pa·s or more, more preferably 680 mPa·s or more, more preferably 750 mPa·s or more, even more preferably 850 mPa·s or more, even more preferably 950 mPa·s or more, and even more preferably 1050 mPa·s or more, and from the same viewpoint, it is preferably 5000 mPa·s or less, more preferably 3000 mPa·s or less, even more preferably 2000 mPa·s or less, even more preferably 1500 mPa·s or less, even more preferably 1300 mPa·s or less, and even more preferably 1200 mPa·s or less.

[0019] <Component (A): Silicone compound> The composition of the present invention is a composition comprising component (A) from the viewpoint of further improving the repellent effect and the sustained repellent effect, and from the viewpoint of η High / η Low From the viewpoint of adjusting the viscosity of the cured product to an appropriate range, it preferably contains a modified silicone (A1) (hereinafter also referred to as "component (A1)"). From the viewpoint of further improving the repellent effect and the sustained repellent effect, the modified silicone (A1) preferably contains at least one selected from the group consisting of poly(N-acylalkyleneimine)-modified silicone, polyether-modified silicone, silicone-modified polysaccharide, amino-modified silicone, carboxy-modified silicone, amino derivative silicone, fatty acid-modified silicone, alcohol-modified silicone, aliphatic alcohol-modified silicone, epoxy-modified silicone, fluorine-modified silicone, and alkyl-modified silicone, and poly(N-acylalkyleneimine)-modified silicone, polyether-modified silicone, silicone-modified polysaccharide, amino-modified silicone, carboxy-modified silicone, and glycol-modified silicone are particularly preferred. It is more preferable that the composition contains at least one selected from the group consisting of serine-modified silicones, and even more preferable that the composition contains at least one selected from the group consisting of poly(N-acylalkyleneimine)-modified silicones, polyether-modified silicones, silicone-modified polysaccharides, amino-modified silicones, and carboxy-modified silicones, and it is even more preferable that the composition contains at least one selected from the group consisting of poly(N-acylalkyleneimine)-modified silicones and polyether-modified silicones, and from the viewpoint of improving the resistance to leakage and spreading when applied to the skin and from the viewpoint of further improving the repellent effect and the sustained repellent effect, it is even more preferable that the composition contains poly(N-acylalkyleneimine)-modified silicone. Furthermore, the modified silicone (A1) preferably contains both a poly(N-acylalkyleneimine)-modified silicone and a polyether-modified silicone, from the viewpoint of improving the resistance to leakage and spreading when applied to the skin, and from the viewpoint of further improving the repellent effect and the sustained repellent effect. These modified silicones (A1) can be used alone or in combination of two or more kinds.

[0020] The content of the poly(N-acylalkyleneimine)-modified silicone in the component (A1) of the present invention is from the viewpoint of further improving the repellent effect and the repellent sustaining effect, and from the viewpoint of η High / η LowFrom the viewpoint of adjusting the content to an appropriate range, it is preferably 5% by mass or more, more preferably 10% by mass or more, even more preferably 12% by mass or more, and even more preferably 15% by mass or more, and from the same viewpoint, it is preferably 100% by mass or less, more preferably 90% by mass or less, even more preferably 80% by mass or less, even more preferably 70% by mass or less, and even more preferably 60% by mass or less.

[0021] [Poly(N-acylalkyleneimine)-modified silicone] Specifically, the poly(N-acylalkyleneimine)-modified silicone is an organopolysiloxane in which poly(N-acylalkyleneimine) segments consisting of repeating units represented by the following general formula (1) are bonded to at least two silicon atoms of the organopolysiloxane segments constituting the main chain via alkylene groups containing heteroatoms.

[0022] [ka] [In the formula, R 1 represents a hydrogen atom, an alkyl group having 1 to 22 carbon atoms, an aralkyl group having 7 to 22 carbon atoms, or an aryl group having 6 to 22 carbon atoms, and n represents 2 or 3.

[0023] The poly(N-acylalkyleneimine) segment can be bonded to at least two of the silicon atoms constituting the organopolysiloxane segment via an alkylene group containing a heteroatom, but is preferably bonded to one or more silicon atoms excluding both ends via the alkylene group, and is more preferably bonded to two or more silicon atoms excluding both ends via the alkylene group. The alkylene group containing a heteroatom present in the bond between the organopolysiloxane segment and the poly(N-acylalkyleneimine) may be an alkylene group containing 1 to 3 nitrogen atoms, oxygen atoms, and / or sulfur atoms and having 2 to 20 carbon atoms. Specific examples thereof include the following.

[0024] [ka]

[0025] The N-acylalkyleneimine unit constituting the poly(N-acylalkyleneimine) segment is represented by the above general formula (1). R in the above general formula (1) 1 In the above formula, examples of the alkyl group having 1 to 22 carbon atoms include linear, branched, or cyclic alkyl groups having 1 to 22 carbon atoms, and specific examples include methyl, ethyl, n-propyl, isopropyl, n-butyl, tert-butyl, pentyl, hexyl, cyclohexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, octadecyl, nonadecyl, eicosyl, and docosyl groups. Among these, alkyl groups having 1 to 10 carbon atoms are preferred, more preferably 1 to 6 carbon atoms, and even more preferably 1 to 4 carbon atoms.

[0026] R in the above general formula (1) 1 In the formula, examples of the aralkyl group having 7 to 22 carbon atoms include a benzyl group, a phenethyl group, a trityl group, a naphthylmethyl group, an anthracenylmethyl group, etc. Among these, an aralkyl group having 7 to 14 carbon atoms is preferred, and an aralkyl group having 7 to 10 carbon atoms is more preferred.

[0027] R in the above general formula (1) 1 In the above, examples of the aryl group having 6 to 22 carbon atoms include a phenyl group, a tolyl group, a xylyl group, a naphthyl group, a biphenyl group, an anthryl group, a phenanthryl group, etc. Among these, an aryl group having 6 to 12 carbon atoms is preferred, and an aryl group having 6 to 9 carbon atoms is more preferred.

[0028] R 1 is preferably an alkyl group having 1 to 22 carbon atoms, more preferably 1 to 10 carbon atoms, even more preferably 1 to 6 carbon atoms, and still more preferably 1 to 4 carbon atoms.

[0029] Preferred poly(N-acylalkyleneimine)-modified silicones include, for example, poly(N-formylethyleneimine)organosiloxane, poly(N-acetylethyleneimine)organosiloxane, and poly(N-propionylethyleneimine)organosiloxane, and one or more of these can be used. Among the above, poly(N-propionylethyleneimine)organosiloxane is preferred from the viewpoint of further improving the repellent effect and the sustained repellent effect.

[0030] [Silicone modified polysaccharides] An example of the silicone-modified polysaccharide is pullulan having a silicone structure in the side chain. Specifically, from the viewpoint of further improving the sustained repellent effect, silicone-modified pullulan in which at least a portion of the hydrogen atoms of the OH groups in pullulan are substituted with a group represented by the following general formula (4) is preferred.

[0031] [ka] In the formula, Z 1 R is a single bond or a divalent organic group. 22 are each independently an alkyl group having 1 to 12 carbon atoms, and X is a group represented by the following formula (i). a is an integer of 1 to 3. From the viewpoint of improving the repellent effect and the sustained repellent effect of the composition, R 22 is preferably a methyl group, an ethyl group, an n-propyl group, a butyl group, or a pentyl group, and is more preferably a methyl group from the viewpoint of improving the resistance of the composition to spreading when applied to the skin. From the viewpoint of versatility, X is preferably a trimethylsiloxy group, and a is preferably 3.

[0032] [ka] In the formula, R 21are each independently a hydrocarbon group having from 1 to 12 carbon atoms, and from the viewpoint of improving the resistance to leakage and spreading of the composition when applied to the skin and from the viewpoint of improving the repellent effect and the sustained repellent effect, are preferably an alkyl group having from 1 to 12 carbon atoms or an aryl group having from 6 to 12 carbon atoms, more preferably an alkyl group or phenyl group having from 1 to 12 carbon atoms, even more preferably an alkyl group having from 1 to 3 carbon atoms, and even more preferably a methyl group. d is an integer of from 1 to 5, and from the viewpoint of versatility, d=1 is preferred.

[0033] In the general formula (4), from the viewpoint of improving the repellent effect and the sustained repellent effect, Z 1 is preferably a divalent organic group, more preferably a divalent group represented by the following general formula (5) or (6), and even more preferably a divalent group represented by the following general formula (6).

[0034] [ka] In the formula, R 31 is an alkylene group having 1 to 10 carbon atoms, and examples thereof include a methylene group, an ethylene group, a trimethylene group, a propylene group, a butylene group, etc. From the viewpoint of improving the repellent effect and the sustained repellent effect, among these, an ethylene group, a trimethylene group, and a propylene group are preferred, and a trimethylene group or a propylene group is more preferred.

[0035] Examples of commercially available silicone-modified pullulan include "TSPL-30-ID" (a solution of tri(trimethylsiloxy)silylpropylcarbamic acid pullulan in isododecane) and "TSPL-30-D5" (a solution of tri(trimethylsiloxy)silylpropylcarbamic acid pullulan in cyclopentasiloxane) manufactured by Shin-Etsu Chemical Co., Ltd.

[0036] From the viewpoint of further improving the repellent effect and the sustained repellent effect, the content of component (A1) in component (A) 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, even more preferably 3% by mass or more, even more preferably 4% by mass or more, even more preferably 5% by mass or more, and even more preferably 6% by mass or more, and from the viewpoint of further improving the repellent effect and the sustained repellent effect, it is preferably 50% by mass or less, more preferably 30% by mass or less, even more preferably 20% by mass or less, even more preferably 15% by mass or less, even more preferably 12% by mass or less, and even more preferably 10% by mass or less.

[0037] The composition of the present invention is a composition comprising component (A) from the viewpoint of further improving the repellent effect and the sustained repellent effect, and from the viewpoint of η High / η Low From the viewpoint of adjusting the amount of the component (A1) to an appropriate range, it preferably contains an unmodified silicone (A2) (hereinafter also referred to as "component (A2)"), and more preferably contains both component (A1) and component (A2). From the viewpoint of further improving the repellent effect and the sustained repellent effect, the unmodified silicone (A2) preferably contains dimethylpolysiloxane, more preferably contains at least one selected from linear dimethylpolysiloxane and cyclic dimethylpolysiloxane, and even more preferably contains linear dimethylpolysiloxane. From the viewpoint of further improving the repellent effect and the sustained repellent effect, the linear dimethylpolysiloxane preferably has a viscosity at 25°C of 1 cSt or more, more preferably 3 cSt or more, and even more preferably 5 cSt or more, and from the viewpoint of further improving the repellent effect and the sustained repellent effect, the viscosity is preferably 60 cSt or less, more preferably 40 cSt or less, even more preferably 20 cSt or less, and even more preferably 10 cSt or less. Commercially available examples of linear dimethylpolysiloxanes include the KF-96 series from Shin-Etsu Chemical Co., Ltd., the SH200C series from Dow Toray Industries, Inc., “2-1184 Fluid,” and “Silsoft DML,” “Element14 PDMS 5-JC,” “Element14 PDMS 10-JC,” and “Element14 PDMS 20-JC” from Momentive Performance Materials, Inc. These unmodified silicones (A2) can be used alone or in combination of two or more kinds.

[0038] In the composition of the present invention, from the viewpoint of further improving the repellent effect and the sustained repellent effect, the content of the non-volatile silicone in the unmodified silicone (A2) is preferably 65% ​​by mass or more, more preferably 80% by mass or more, even more preferably 85% by mass or more, even more preferably 88% by mass or more, and even more preferably 90% by mass or more. The upper limit of the content of the non-volatile silicone in the unmodified silicone (A2) is not particularly limited, but is preferably 100% by mass or less. Here, the non-volatile silicone refers to, for example, a silicone compound that has a vapor pressure of less than 10 Pa at room temperature (25° C.) and normal pressure.

[0039] From the viewpoint of further improving the repellent effect and the sustained repellent effect, the content of component (A2) in component (A) of the present invention is preferably 50% by mass or more, more preferably 70% by mass or more, even more preferably 80% by mass or more, even more preferably 85% by mass or more, even more preferably 88% by mass or more, and even more preferably 90% by mass or more, and from the viewpoint of further improving the repellent effect and the sustained repellent effect, it is preferably 99.5% by mass or less, more preferably 99% by mass or less, even more preferably 98% by mass or less, even more preferably 97% by mass or less, even more preferably 96% by mass or less, even more preferably 95% by mass or less, and even more preferably 94% by mass or less.

[0040] The mass ratio of component (A1) to component (A2) in component (A) of the present invention [(A1) / (A2)] is preferably 0.01 or more, more preferably 0.02 or more, even more preferably 0.03 or more, even more preferably 0.05 or more, even more preferably 0.06 or more, and even more preferably 0.07 or more, from the viewpoint of improving the resistance to leakage and spreading of the composition when applied to the skin and from the viewpoint of further improving the repellent effect and the sustained repellent effect, and from the same viewpoints, is preferably 1 or less, more preferably 0.5 or less, even more preferably 0.2 or less, even more preferably 0.15 or less, and even more preferably 0.1 or less.

[0041] From the viewpoint of further improving the repellent effect and the sustained repellent effect, the content of component (A) in the composition of the present invention is preferably 50 mass% or more, more preferably 60 mass% or more, even more preferably 70 mass% or more, even more preferably 80 mass% or more, even more preferably 90 mass% or more, and even more preferably 95 mass% or more, and from the viewpoint of further improving the repellent effect and the sustained repellent effect, it is preferably 100 mass% or less.

[0042] From the viewpoint of further improving the repellent effect and the sustained repellent effect, the content of component (A1) in the composition of the present invention is preferably 1.0 mass% or more, more preferably 2.0 mass% or more, even more preferably 4.0 mass% or more, even more preferably 6.0 mass% or more, even more preferably 7.5 mass% or more, even more preferably 8.0 mass% or more, and even more preferably 8.45 mass% or more, and from the viewpoint of further improving the repellent effect and the sustained repellent effect, it is preferably 15 mass% or less, more preferably 13.5 mass% or less, and even more preferably 13.0 mass% or less.

[0043] From the viewpoint of further improving the repellent effect and the sustained repellent effect, the content of volatile components in the composition of the present invention is preferably 30% by mass or less, more preferably 20% by mass or less, even more preferably 15% by mass or less, even more preferably 10% by mass or less, even more preferably 8% by mass or less, even more preferably 3% by mass or less, even more preferably 1% by mass or less, and even more preferably essentially 0% by mass. Here, a volatile component refers to, for example, a compound having a vapor pressure of 10 Pa or more at room temperature (25°C) and normal pressure, and examples of such a compound include water, lower alcohols, volatile hydrocarbon oils, volatile ester oils, and volatile silicone compounds.

[0044] In order to further suppress the sticky feeling, the composition of the present invention preferably contains a small amount of the film-forming polymer. The content of the film-forming polymer (excluding those corresponding to the silicone compound (A)) in the composition of the present invention is preferably less than 0.5% by mass, more preferably less than 0.1% by mass, even more preferably 0.07% by mass or less, even more preferably 0.05% by mass or less, and even more preferably 0.01% by mass or less. Examples of the film-forming polymer include silicone structure-containing polymers, vinyl polymers, urethane polymers, polysaccharide polymers, etc. Examples of such film-forming polymers include polymers other than the silicone compound (A) among the polymers described in paragraphs 0038 to 0064 of JP2020-109078A.

[0045] <Component (C): Non-volatile liquid oily components other than silicone compounds (A)> The composition of the present invention may contain a non-volatile liquid oily component other than the silicone compound (A) as component (C), but the content of component (C) in the composition of the present invention is preferably 30% by mass or less, more preferably 15% by mass or less, even more preferably 12% by mass or less, even more preferably 10% by mass or less, even more preferably 8% by mass or less, even more preferably 5% by mass or less, even more preferably 3% by mass or less, and even more preferably 1% by mass or less, from the viewpoint of improving the resistance to leakage and spreading when the composition is applied to the skin, and from the viewpoint of further improving the repellent effect and the repellent sustaining effect. Examples of non-volatile liquid oily components other than the silicone compound (A) include, for example, ester oils, ether oils, hydrocarbon oils, aliphatic alcohols, polyhydric alcohols, and the like described in paragraphs 0023 to 0035 of JP 2020-109078 A.

[0046] <Other ingredients> The composition of the present invention may contain other components, such as solvents, thickeners, surfactants, preservatives, colorants, moisturizers, fragrances, pH adjusters, etc., as appropriate, within the scope of not impairing the effects of the invention. It may also contain medicinal or physiologically active components, such as vitamins, blood circulation promoters, active oxygen scavengers, anti-inflammatory agents, whitening agents, and bactericides. It may also be used for other purposes, such as using fragrances as bactericides.

[0047] It is preferable that the composition of the present invention contains component (A) as a repellent component for pest repellency and does not contain any other effective amount of pest repellent other than the component (A) from the viewpoint of preventing allergies and rough skin of the user.

[0048] Here, "not containing an effective amount of" a pest repellent other than component (A) generally means that the content of existing pest repellents other than component (A) in the composition of the present invention is preferably 15 mass% or less, more preferably 10 mass% or less, even more preferably 5 mass% or less, even more preferably 4 mass% or less, even more preferably 3 mass% or less, and even more preferably 1 mass% or less. The effective amount of an existing pest repellent can be determined by referring to, for example, the minimum effective amount published by the manufacturer of each repellent product. More specifically, the effective amount of DEET: N,N-diethyltoluamide, which is an existing pest repellent described later, 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.

[0049] Since the composition of the present invention has a repellent effect and a sustained repellent effect even without containing an effective amount of an existing pest repellent, it is preferable that the composition of the present invention does not substantially contain any pest repellent other than component (A). The content of the pest repellent other than component (A) in the composition of the present invention is preferably 0.5 mass% or less, more preferably 0.1 mass% or less, even more preferably 0.01 mass% or less, and even more preferably substantially 0 mass%.

[0050] Examples of existing pest repellents other than component (A) 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 (essential oils) obtained by extracting, distilling, or squeezing components contained in plants, which have a pest repellent effect.

[0051] The composition of the present invention may contain powder such as organic powder or inorganic powder. From the viewpoint of pest repellent effect, the content of the powder is preferably less than 30 mass%, more preferably 25 mass% or less, even more preferably 20 mass% or less, and even more preferably 15 mass% or less. It may also be 10 mass% or less, 5 mass% or less.

[0052] The composition of the present invention can be produced by a conventional method, for example, by blending component (A) and, if necessary, other components, and stirring them using a known device.

[0053] There are no particular limitations 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 approach humans and other animals while flying and suck blood from their skin, pests that transmit pathogenic bacteria while flying without sucking blood, and pests that cause discomfort to humans by flying themselves. Specific examples of flying pests include mosquitoes such as Culex pipiens quinquefasciatus, Culex tritaeniorhynchus, Culex pipiens molestus, and Culex quinquefasciatus; mosquitoes such as Aedes aegypti, Aedes albopictus, Anopheles sinensis, Aedes togoi, Anopheles gambiae, and Anopheles stephensis; midges such as Chironomidae and Chironomidae akamusi; black flies such as Juniperus nigricans, Juniperus quinquefasciatus, and Juniperus acutus; house flies, Musca domestica, and other insecticides. Flies such as house flies, little house flies, black flies, flesh flies, seed flies, onion flies, fruit flies, Drosophila melanogaster, moth flies, Chickweed flies, and stable flies; horse flies such as black flies, horse flies, deer flies, and spotted flies; midges such as the Japanese black midge, the Oshima midge, and the chicken midge; and bees such as the Japanese yellow hornet, the Japanese paper wasp, and the honeybee. The composition of the present invention is particularly effective in providing a long-lasting repellent effect against mosquitoes, particularly Culex pipiens pallens, Culex tritaeniorhynchus, Culex pipiens quinquefasciatus, Aedes aegypti, and Aedes albopictus.

[0054] [How to repel pests] The method for repelling pests of the present invention comprises the step of applying the pest repellent composition of the present invention to a skin surface. Here, "applying to the skin surface" includes not only directly applying the composition to the skin surface with the hands or the like, 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 repellent effect and the sustained repellent effect. 2 From the viewpoints of suppressing stickiness and economy, the amount is preferably 0.1 mg or more, more preferably 0.2 mg or more, and even more preferably 0.25 mg or more per cm 2 It is preferably 10 mg or less, more preferably 7 mg or less, and even more preferably 5 mg or less.

[0055] In addition to the above-mentioned embodiments, the present invention further discloses the following embodiments.

[0056] <1> A pest repellent composition comprising a silicone compound (A), Using a rheometer, the following method 1 was used: -1 s -1 Shear viscosity η Low Shear rate 10 2 s -1 Shear viscosity η High The ratio (η High / η Low ) is 0.9 or less, and the shear viscosity η High is 450 mPa s or less, and the shear viscosity η Low A pest repellent composition having a viscosity of 150 mPa·s or more. (Method 1) Using a cone plate (diameter 50 mm, angle 0.1 rad), 25°C, shear rate range: 10 -3 ~10 3 s -1 Measure the shear viscosity (mPa s) under the following conditions: Distance between plates: 1 mm <2> The η High / η Low is preferably 0.8 or less, more preferably 0.7 or less, more preferably 0.6 or less, more preferably 0.55 or less, more preferably 0.5 or less, more preferably 0.45 or less, more preferably 0.35 or less, more preferably 0.25 or less, and is preferably 0.01 or more, more preferably 0.03 or more, more preferably 0.05 or more, more preferably 0.08 or more, more preferably 0.10 or more. <1> The pest repellent composition according to claim 1. <3> The shear viscosity η Highis preferably 430 mPa·s or less, more preferably 400 mPa·s or less, even more preferably 390 mPa·s or less, even more preferably 370 mPa·s or less, even more preferably 345 mPa·s or less, even more preferably 320 mPa·s or less, even more preferably 295 mPa·s or less, even more preferably 280 mPa·s or less, even more preferably 250 mPa·s or less, even more preferably 150 mPa·s or less, and is preferably 50 mPa·s or more, more preferably 80 mPa·s or more, even more preferably 100 mPa·s or more. <1> or <2> The pest repellent composition according to claim 1. <4> The shear viscosity η Low is preferably 250 mPa·s or more, more preferably 350 mPa·s or more, more preferably 450 mPa·s or more, more preferably 480 mPa·s or more, more preferably 500 mPa·s or more, more preferably 515 mPa·s or more, more preferably 540 mPa·s or more, more preferably 580 mPa·s or more, more preferably 620 mPa·s or more, more preferably 680 mPa·s or more, more preferably 750 mPa·s or more, more preferably 850 mPa·s or more, more preferably 950 mPa·s or more, more preferably 1050 mPa·s or more, and is preferably 5000 mPa·s or less, more preferably 3000 mPa·s or less, more preferably 2000 mPa·s or less, more preferably 1500 mPa·s or less, more preferably 1300 mPa·s or less, more preferably 1200 mPa·s or less. <1> ~ <3> 2. The pest repellent composition according to claim 1 . <5> The silicone compound (A) preferably contains a modified silicone (A1). <1> ~ <4> 2. The pest repellent composition according to claim 1 . <6> The modified silicone (A1) preferably comprises at least one selected from the group consisting of poly(N-acylalkyleneimine)-modified silicone, polyether-modified silicone, silicone-modified polysaccharide, amino-modified silicone, carboxy-modified silicone, amino derivative silicone, fatty acid-modified silicone, alcohol-modified silicone, aliphatic alcohol-modified silicone, epoxy-modified silicone, fluorine-modified silicone, and alkyl-modified silicone, more preferably comprises at least one selected from the group consisting of poly(N-acylalkyleneimine)-modified silicone, polyether-modified silicone, silicone-modified polysaccharide, amino-modified silicone, carboxy-modified silicone, and glycerin-modified silicone, further preferably comprises at least one selected from the group consisting of poly(N-acylalkyleneimine)-modified silicone, polyether-modified silicone, silicone-modified polysaccharide, amino-modified silicone, and carboxy-modified silicone, further preferably comprises at least one selected from the group consisting of poly(N-acylalkyleneimine)-modified silicone and polyether-modified silicone, and further preferably comprises at least one selected from the group consisting of poly(N-acylalkyleneimine)-modified silicone and polyether-modified silicone, <5> The pest repellent composition according to claim 1. <7> The content of the poly(N-acylalkyleneimine)-modified silicone in the modified silicone (A1) is preferably 5% by mass or more, more preferably 10% by mass or more, even more preferably 12% by mass or more, even more preferably 15% by mass or more, and is preferably 100% by mass or less, more preferably 90% by mass or less, even more preferably 80% by mass or less, even more preferably 70% by mass or less, even more preferably 60% by mass or less. <5> or <6> The pest repellent composition according to claim 1. <8> The silicone compound (A) preferably contains an unmodified silicone (A2), and more preferably contains both the modified silicone (A1) and the unmodified silicone (A2). <1> ~ <7> 2. The pest repellent composition according to claim 1 . <9> The content of non-volatile silicone in the unmodified silicone (A2) is preferably 65% ​​by mass or more, more preferably 80% by mass or more, even more preferably 85% by mass or more, even more preferably 88% by mass or more, even more preferably 90% by mass or more, and preferably 100% by mass or less. <8> The pest repellent composition according to claim 1. <10> The unmodified silicone (A2) preferably contains dimethylpolysiloxane, more preferably contains at least one selected from linear dimethylpolysiloxane and cyclic dimethylpolysiloxane, and further preferably contains linear dimethylpolysiloxane. <8> or <9> The pest repellent composition according to claim 1. <11> The content of the unmodified silicone (A2) in the silicone compound (A) is preferably 50% by mass or more, more preferably 70% by mass or more, even more preferably 80% by mass or more, even more preferably 85% by mass or more, even more preferably 88% by mass or more, and even more preferably 90% by mass or more, and is preferably 99.5% by mass or less, more preferably 99% by mass or less, even more preferably 98% by mass or less, even more preferably 97% by mass or less, even more preferably 96% by mass or less, even more preferably 95% by mass or less, and even more preferably 94% by mass or less. <8> ~ <10> 2. The pest repellent composition according to claim 1 . <12> The mass ratio of the modified silicone (A1) to the unmodified silicone (A2) in the silicone compound (A) [(A1) / (A2)] is preferably 0.01 or more, more preferably 0.02 or more, even more preferably 0.03 or more, even more preferably 0.05 or more, even more preferably 0.06 or more, even more preferably 0.07 or more, and is preferably 1 or less, more preferably 0.5 or less, even more preferably 0.2 or less, even more preferably 0.15 or less, even more preferably 0.1 or less. <5> ~ <11> 2. The pest repellent composition according to claim 1 . <13> The content of the silicone compound (A) is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, even more preferably 80% by mass or more, even more preferably 90% by mass or more, even more preferably 95% by mass or more, and preferably 100% by mass or less. <1> ~ <12> 2. The pest repellent composition according to claim 1 . <14> The content of volatile components is preferably 30% by mass or less, more preferably 20% by mass or less, even more preferably 15% by mass or less, even more preferably 10% by mass or less, even more preferably 8% by mass or less, even more preferably 3% by mass or less, even more preferably 1% by mass or less, and even more preferably substantially 0% by mass. <1> ~ <13> 2. The pest repellent composition according to claim 1 . <15> The content of the film-forming polymer (excluding those corresponding to the silicone compound (A)) is preferably less than 0.5% by mass, more preferably less than 0.1% by mass, even more preferably 0.07% by mass or less, even more preferably 0.05% by mass or less, and even more preferably 0.01% by mass or less. <1> ~ <14> 2. The pest repellent composition according to claim 1 . <16> The content of non-volatile liquid oily components other than the silicone compound (A) is preferably 30% by mass or less, more preferably 15% by mass or less, even more preferably 12% by mass or less, even more preferably 10% by mass or less, even more preferably 8% by mass or less, even more preferably 5% by mass or less, even more preferably 3% by mass or less, and even more preferably 1% by mass or less. <1> ~ <15> 2. The pest repellent composition according to claim 1 . <17> The content of existing pest repellents other than the silicone compound (A) is preferably 15% 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, and even more preferably 1% by mass or less. <1> ~ <16> 2. The pest repellent composition according to claim 1 . <18> The pest is a flying pest. <1> ~ <17> 2. The pest repellent composition according to claim 1 . <19> The flying pest is a mosquito. <18> The pest repellent composition according to claim 1. <20> <1> ~ <19> A method for repelling pests, comprising the step of applying the pest repellent composition according to any one of claims 1 to 5 to a skin surface. <21> The amount of composition applied to the skin surface is 1 cm 2 Preferably, the weight is 0.1 mg or more, more preferably 0.2 mg or more, and even more preferably 0.25 mg or more per cm 2 Preferably, the amount is 10 mg or less, more preferably 7 mg or less, and even more preferably 5 mg or less. <20> 2. A method for repelling pests according to claim 1. EXAMPLES

[0057] 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.

[0058] (Shear Viscosity Measurement) A composition (1 g) of each example was applied to the center of a plate (LOWER MEASURING PLATE, L-PP57 / CTD450), and the composition was sandwiched from above with a cone plate (diameter 50 mm, angle 0.1 rad, CP50-1). After removing the composition that protruded between the plates, measurements were performed under the following conditions. Measurement device: Rheometer (product name: MCR302, manufactured by Anton-Paar) ·Temperature: 25℃ Shear rate range: 10 -3 ~10 3 s -1 ·Measurement point interval: 30~2(s) Distance between plates: 1mm Measurement mode: Rotation mode

[0059] (Evaluation of repellent effect duration) (I) Preparation of Aedes albopictus The mosquitoes used were adult female Aedes albopictus mosquitoes purchased from Sumitomo Technoservice Co., Ltd., which were reared in cages at 27°C and 70% relative humidity (RH). They were given 10% sucrose by mass as food.

[0060] (II) Measurement of repellent effect duration Approximately 250 adult female Asian tiger mosquitoes were transferred to a plastic cage (30 x 30 x 30 cm) and the test was carried out under conditions of 27°C and 70% relative humidity (RH). A hole measuring 3 x 10 cm was made in the forearm of a rubber glove large enough to cover the subject's arm, and 1 mg / cm of each composition was applied. 2 The composition was applied evenly so that the repellent effect was 0 hours. After that, the breath was blown on the plastic cage for 5 seconds to activate the Asian tiger mosquitoes. The test was performed by placing the forearm on which the composition was applied in a plastic cage and exposing it to the Asian tiger mosquitoes for 3 minutes and counting the number of blood-sucking. The test was terminated when blood was sucked twice in total, and exposure was continued for 3 minutes every 30 minutes until the end of the test. If the second stop occurred during the 30-minute exposure, the duration of the repellent effect was determined to be 0 hours, and if the second stop occurred during the 60-minute exposure, the duration of the repellent effect was determined to be 0.5 hours. The results are shown in Table 2.

[0061] (Evaluation of leak spread resistance) Each composition was applied at 1 mg / cm2 on the inside of the forearm in an area of ​​4 x 5 cm. 2 The coating was applied and spread evenly over 10 seconds at 25°C and 57% RH. After 1 hour, leakage and spreading from the coated surface was evaluated on a 4-point scale according to the following criteria, and the scores are shown in Table 2. A: The spread of leakage from the coating surface is 0.3 cm or less B: The spread of leakage from the coating surface is greater than 0.3 cm and less than 1 cm C: Spread of the coating from the surface is greater than 1 cm and less than 2 cm D: Spread of the coating surface is greater than 2 cm

[0062] Examples 1 to 11 and Comparative Examples 1 to 4 (Production and Evaluation of Compositions) The components shown in Table 1 were mixed in the amounts shown in Table 2, and the mixture was stirred at 80°C and 2000 rpm for 10 minutes using a TK ROBOMIX (manufactured by Tokushu Kika Kogyo Co., Ltd.) with the stirring section replaced by a TK Homomixer MARKII2.5 type, and then allowed to cool to room temperature to obtain compositions of each example. The obtained compositions were used to carry out various evaluations using the above-mentioned methods. The results are shown in Table 2. The units of the numerical values ​​of the amounts shown in Table 2 are parts by mass.

[0063] [Table 1]

[0064] The poly(N-propionylethyleneimine)organosiloxanes shown in Table 1 were produced by the following method.

[0065] (Synthesis of poly(N-propionylethyleneimine)organosiloxane) A mixture of 3.63 g (0.036 mol) of 2-ethyl-2-oxazoline and 8.46 g of ethyl acetate was dehydrated with 0.6 g of molecular sieves (Zeolum A-4, manufactured by Tosoh Corporation) at 28° C. for 15 hours. A mixture of 100 g of side chain primary aminopropyl modified polydimethylsiloxane (KF-8015, Shin-Etsu Silicones, weight average molecular weight 100,000, amine equivalent 20,000) and 203 g of ethyl acetate was dehydrated with 15.2 g of molecular sieves at 28° C. for 15 hours. 0.54g (0.0035 mol) of diethyl sulfate was added to the above-mentioned ethyl acetate solution of dehydrated 2-ethyl-2-oxazoline, and the mixture was heated and refluxed at 80°C for 8 hours under a nitrogen atmosphere to synthesize terminally reactive poly(N-propionylethyleneimine). The number average molecular weight measured by GPC was 1200. The above-mentioned dehydrated side chain primary aminopropyl modified polydimethylsiloxane solution was added all at once to the obtained terminally reactive poly(N-propionylethyleneimine) solution, and the mixture was heated and refluxed at 80°C for 10 hours. The reaction mixture was concentrated under reduced pressure to give poly(N-propionylethyleneimine)organosiloxane as a pale yellow rubbery solid (102 g). The mass ratio of the organopolysiloxane segment in the final product was 0.96, and the weight average molecular weight of the final product was 104,000.

[0066] [Table 2]

[0067] From Table 2, it can be seen that the compositions of the examples have a longer duration of repellent effect than the compositions of the comparative examples, and thus have an improved repellent duration.

Claims

1. A pest repellent composition comprising a silicone compound (A), The shear viscosity η at a shear rate of 10 -１ s -１ and the ratio (η Ｌｏｗ / η ２ s -１ at a shear rate of 10 Ｈｉｇｈ is 0.9 or less, the shear viscosity η Ｈｉｇｈ is 450 mPa·s or less, and the shear viscosity η Ｌｏｗ is 150 mPa·s or more, a pest repellent composition. Ｈｉｇｈ is 450 mPa·s or less, and the shear viscosity η Ｌｏｗ is 150 mPa·s or more, a pest repellent composition. (Method 1) Using a cone plate (diameter 50 mm, angle 0.1 rad), at 25°C, shear rate range: 10 -３ ~10 ３ s -１ The shear viscosity (mPa·s) is measured under the condition that the distance between plates is 1 mm.

2. The insect repellent composition according to claim 1, wherein the silicone compound (A) comprises a modified silicone (A1).

3. The insect repellent composition according to claim 2, wherein the modified silicone (A1) comprises at least one selected from the group consisting of poly(N-acylalkyleneimine) modified silicone, polyether modified silicone, silicone modified polysaccharide, amino modified silicone, and carboxy modified silicone.

4. The insect repellent composition according to claim 2, wherein the modified silicone (A1) comprises at least one selected from the group consisting of poly(N-acylalkyleneimine) modified silicone and polyether modified silicone.

5. The insect repellent composition according to claim 1, wherein the silicone compound (A) comprises unmodified silicone (A2).

6. The insect repellent composition according to claim 5, wherein the content of non-volatile silicone in the unmodified silicone (A2) is 65% by mass or more.

7. The insect repellent composition according to claim 5, wherein the unmodified silicone (A2) comprises dimethylpolysiloxane.

8. The insect repellent composition according to claim 1, wherein the content of volatile components is 30% by mass or less.

9. The insect repellent composition according to claim 1, wherein the content of film-forming polymers (excluding those corresponding to the silicone compound (A)) is less than 0.5% by mass.

10. The insect repellent composition according to claim 1, wherein the insect is a flying insect.

11. A method for repelling insects, comprising the step of applying an insect repellent composition according to any one of claims 1 to 10 to the surface of the skin.