Body cleansing composition and method for relieving skin itchiness in winter

Abstract

To provide a body cleansing composition that can significantly reduce skin itching in winter, and a method for reducing skin itching in winter using the body cleansing composition. [Solution] A body cleansing composition containing (A) dimethicone having a kinematic viscosity of 3 cSt or more and less than 20 cSt at 25°C and / or (B) polysilicone-13 represented by the following general formula (1). TIFF2026105574000014.tif41167 x, y, and z represent repeating numbers and are integers greater than or equal to 1.

Description

Technical Field

[0001] The present invention relates to a body cleansing composition for winter and a method for reducing winter skin itching (hereinafter referred to as "winter skin itching") that can reduce skin itching occurring in winter (November to March).

Background Art

[0002] It is known that winter skin itching occurs starting from rough skin on the skin surface due to winter dryness, and the nerves in the skin extend from the dermis to the epidermis due to the stimulation caused by friction with clothes, making the skin sensitive to the stimulation.

[0003] As methods for reducing winter skin itching推测 from this mechanism, for example, (1) improving rough skin by moisturizing the skin, (2) reducing friction on the skin surface, (3) refraining from using a body cleansing composition and reducing the stimulation caused by the body cleansing composition, etc. can be considered.

[0004] Regarding the above (1) skin moisturization, the use of a moisturizing cream has conventionally been recommended for the purpose of reducing winter skin itching, and certain effects have been recognized.

[0005] For the purpose of reducing the above (2) friction on the skin surface, many products are formulated with silicone in the lotion, but it has not been specifically confirmed that reducing the friction on the skin surface can reduce winter skin itching. For example, a skin cleansing agent containing a highly polymerized silicone with a degree of polymerization of 3,000 to 20,000 has been proposed (see, for example, Patent Document 1). This proposed skin cleansing agent, when used as a facial cleanser and face wash, is described as providing a smooth feeling without tightness after cleansing, but it has not been confirmed to alleviate winter skin itchiness. Furthermore, highly polymerized silicone has high viscosity and is difficult to handle as is, so it is usually dissolved in a diluent such as a low-boiling-point oil before use. However, since highly polymerized silicone diluted with a low-boiling-point oil is oil-soluble, even if it is formulated as an easily blendable emulsion, adding 1% or more by mass of highly polymerized silicone to a body cleansing composition causes the body cleansing composition to separate over time.

[0006] One of the characteristics of the body cleansing composition described in (3) above is that its foam can cleanse every part of the body, which is significantly different in its mechanism of action from skin care formulations that are applied locally. Since winter skin itching is caused by friction with clothing, using a body cleansing composition can cause itching in a wide range of areas of the body, which presents a challenge as it exacerbates the problem of skin itching.

[0007] Therefore, the main methods for alleviating winter skin itchiness are to enhance skin hydration with skincare formulations or to reduce friction on the skin's surface, and the use of body cleansing compositions is generally avoided. Further improvements are desired. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Japanese Patent Application Publication No. 9-110671 [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] This invention has been made in view of the above circumstances, and aims to provide a body cleansing composition that can significantly reduce skin itching in winter, and a method for reducing skin itching in winter using the body cleansing composition. [Means for solving the problem]

[0010] As a result of diligent research conducted by the inventors to achieve the aforementioned objectives, it was discovered that a body cleansing composition containing (A) low-viscosity dimethicone having a kinematic viscosity of 3 cSt or more and less than 20 cSt at 25°C and / or (B) polysilicone-13 represented by the following general formula (1) can significantly reduce skin itching in winter, leading to the present invention.

[0011] The present invention is based on the aforementioned findings by the inventors, and the means for solving the aforementioned problems are as follows.

[0012] The body cleansing composition of the present invention contains (A) dimethicone having a kinematic viscosity of 3 cSt or more and less than 20 cSt at 25°C and / or (B) polysilicone-13 represented by the following general formula (1).

[0013] [ka] However, in the general formula (1) above, x, y, and z represent repeating numbers and are integers greater than or equal to 1.

[0014] Furthermore, it is preferable that the body cleansing composition has a kinematic viscosity of (A) dimethicone at 25°C of 5 cSt or more and 10 cSt or less. Furthermore, it is preferable that the body cleansing composition contains (A) dimethicone having a kinematic viscosity of 3 cSt or more and less than 20 cSt at 25°C, and (B) polysilicone-13. Furthermore, it is preferable that the body cleansing composition has a mass ratio (A:B) of (A) dimethicone having a kinematic viscosity of 3 cSt or more and less than 20 cSt at 25°C to (B) polysilicone-13 of 1:9 to 9:1. Further, it is preferable that the body cleansing composition contains (A) dimethicone having a kinematic viscosity at 25°C of 3 cSt or more and less than 20 cSt in an amount of 0.01 to 10% by mass. Further, it is preferable that the body cleansing composition contains (B) polysilicone-13 in an amount of 0.1 to 5% by mass. Further, it is preferable that the body cleansing composition further contains (C) an anionic surfactant in an amount of 1 to 30% by mass. Further, it is preferable that the body cleansing composition is for reducing winter skin itchiness.

[0015] The method for reducing winter skin itchiness of the present invention comprises cleansing the body of a user using the body cleansing composition of the present invention.

Advantages of the Invention

[0016] According to the present invention, it is possible to provide a body cleansing composition capable of significantly reducing winter skin itchiness and a method for reducing winter skin itchiness using the body cleansing composition.

Modes for Carrying Out the Invention

[0020] Dimethicone has a kinematic viscosity of 3 cSt or more and less than 20 cSt at 25°C, preferably between 5 cSt and 10 cSt. A kinematic viscosity of 3 cSt or more and less than 20 cSt at 25°C for dimethicone can significantly reduce skin itching in winter. The kinematic viscosity of dimethicone at 25°C is measured at 25°C using a kinematic viscometer in accordance with JIS Z8803. Dimethicone with a kinematic viscosity of 3 cSt or more and less than 20 cSt at 25°C can be added as is, but it is preferable to add it as an emulsion to improve its stability in the formulation. The content of dimethicone in component (A), whose kinematic viscosity at 25°C is 3 cSt or more and less than 20 cSt, is preferably 0.01 to 10% by mass, and more preferably 0.03 to 5% by mass, relative to the total amount of the body cleansing composition. When the dimethicone content of component (A) is 0.01 to 10% by mass, skin itching in winter can be significantly reduced.

[0021] <(B) Polysilicone-13> Polysilicone-13 (cosmetic product name) is a silicone-based surfactant whose quasi-drug product name is poly(oxyethylene-oxypropylene)-butylene-methylpolysiloxane copolymer, and is represented by the following general formula (1). Because polysilicone-13 allows the polyether and silicone portions to coexist on the same surface, the silicone portion can provide slipperiness to the skin, while the polyether portion can provide hydrophilicity. Therefore, it is believed that this material can provide excellent relief from winter skin itching.

[0022] [ka] However, in the general formula (1) above, x, y, and z represent repeating numbers and are integers greater than or equal to 1.

[0023] Polysilicone-13 can be added as is, but it is preferable to add it as an emulsion to improve its stability in the formulation. The polysilicone-13 content of component (B) is preferably 0.1 to 5% by mass, more preferably 0.3 to 5% by mass, and even more preferably 0.5 to 3% by mass, based on the total amount of the body cleansing composition. When the polysilicone-13 content of component (B) is 0.1 to 5% by mass, it can reduce skin itching in winter.

[0024] In this invention, by using (A) dimethicone having a kinematic viscosity of 3 cSt or more and less than 20 cSt at 25°C in combination with (B) polysilicone-13, it is possible to reduce skin itching in winter. The mass ratio (A:B) of dimethicone, component (A), having a kinematic viscosity of 3 cSt or more and less than 20 cSt at 25°C, to polysilicone-13, component (B), is preferably 1:9 to 9:1, and more preferably 2:8 to 8:2. A mass ratio (A:B) of 1:9 to 9:1 can reduce skin itching in winter.

[0025] <(C) Anionic surfactant> Examples of anionic surfactants for component (C) include higher fatty acid salts, alkyl sulfate salts, polyoxyethylene alkyl ether sulfates, alkyl amide ether sulfates, polyoxyethylene amide ether sulfates, polyoxyethylene alkyl ether acetates, alkyl phosphates, polyoxyethylene alkyl ether phosphates, α-olefin sulfonates, N-acyl amino acid salts, N-acyl isethionates, N-acyl methyl taurates, and alkyl sulfosuccinates. These may be used individually or in combination of two or more. Among these, higher fatty acid salts are preferred.

[0026] Examples of higher fatty acids include salts of lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, and coconut oil fatty acids, and more preferably salts of lauric acid, myristic acid, or palmitic acid. Examples of salts of higher fatty acids include alkali metal salts such as sodium salts and potassium salts, and alkanolamine salts such as triethanolamine salts. Among these, alkali metal salts are preferred, and potassium salts are more preferred.

[0027] The content of component (C), the anionic surfactant, is preferably 1 to 30% by mass, and more preferably 5 to 25% by mass, relative to the total amount of the body cleansing composition. A good cleansing effect can be obtained when the content of component (C), the anionic surfactant, is 1 to 30% by mass.

[0028] <Other ingredients> In addition to components (A) to (C) above, the body cleansing composition of the present invention may contain other components commonly used in body cleansing compositions, and is manufactured according to conventional methods. Specific examples of other components are listed below.

[0029] Examples of moisturizing agents include chondroitin sulfate, hyaluronic acid, mucoitin sulfate, carotenoid acid, atelocollagen, cholesteryl-12-hydroxystearate, sodium lactate, bile salts, dl-pyrrolidone carboxylate, short-chain soluble collagen, diglycerin (EO)PO adduct, Rosa rugosa extract, Achillea millefolium extract, Melilotus extract, and cyclic amino acids.

[0030] Examples of thickening agents include gum arabic, carrageenan, karaya gum, tragacanth gum, carob gum, quince seed (marmelo), casein, dextrin, gelatin, sodium pectinate, sodium araginate, methylcellulose, ethylcellulose, CMC, hydroxyethylcellulose, hydroxypropylcellulose, PVA, PVM, PVP, sodium polyacrylate, carboxyvinyl polymer, locust bean gum, guar gum, tamarind gum, dialkyldimethylammonium sulfate cellulose, xanthan gum, aluminum magnesium silicate, bentonite, hectorite, aluminum magnesium silicate (bee gum), laponite, and anhydrous silicic acid.

[0031] Examples of naturally occurring water-soluble polymers include plant-derived polymers (e.g., gum arabic, tragacanth gum, galactan, guar gum, carob gum, karaya gum, carrageenan, pectin, agar, quince seed, algae colloid (Kassa extract), starch (rice, corn, potato, wheat), glycyrrhizic acid); microbial polymers (e.g., xanthan gum, dextran, succinoglucan, pullulan, etc.); and animal-derived polymers (e.g., collagen, casein, albumin, gelatin, etc.).

[0032] Examples of semi-synthetic water-soluble polymers include starch-based polymers (e.g., carboxymethyl starch, methylhydroxypropyl starch, etc.); cellulose-based polymers (methylcellulose, ethylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, sodium cellulose sulfate, hydroxypropylcellulose, carboxymethylcellulose, sodium carboxymethylcellulose, crystalline cellulose, cellulose powder, etc.); and alginate-based polymers (e.g., sodium alginate, propylene glycol alginate ester, etc.).

[0033] Examples of synthetic water-soluble polymers include vinyl polymers (e.g., polyvinyl alcohol, polyvinyl methyl ether, polyvinylpyrrolidone, carboxyvinyl polymer, etc.); polyoxyethylene polymers (e.g., polyethylene glycol 20,000, 40,000, 60,000, etc.); acrylic polymers (e.g., sodium polyacrylate, polyethyl acrylate, polyacrylamide, etc.); polyethyleneimines; and cationic polymers.

[0034] Examples of cationic surfactants include alkyltrimethylammonium salts (e.g., stearyltrimethylammonium chloride, lauryltrimethylammonium chloride, etc.); alkylpyridinium salts (e.g., cetylpyridinium chloride, etc.); dialkyldimethylammonium salts such as distearyldimethylammonium chloride; poly(N,N'-dimethyl-3,5-methylenepiperidinium) chloride; alkylquaternary ammonium salts; alkyldimethylbenzylammonium salts; alkylisoquinolinium salts; dialkylmolyphonium salts; POE-alkylamines; alkylamine salts; polyamine fatty acid derivatives; amyl alcohol fatty acid derivatives; benzalkonium chloride; and benzethonium chloride.

[0035] Examples of amphoteric surfactants include imidazoline-based amphoteric surfactants (e.g., 2-undecyl-N,N,N-(hydroxyethylcarboxymethyl)-2-imidazoline sodium, 2-cocoyl-2-imidazolinium hydroxide-1-carboxyethyloxy disodium salt, etc.); and betaine-based surfactants (e.g., 2-heptadecyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, lauryldimethylaminoacetic acid betaine, alkyl betaine, amide betaine, sulfobetaine, etc.).

[0036] Examples of hydrophilic nonionic surfactants include POE-sorbitan fatty acid esters (e.g., POE-sorbitan monooleate, POE-sorbitan monostearate, POE-sorbitan monooleate, POE-sorbitan tetraoleate, etc.); POE-sorbitol fatty acid esters (e.g., POE-sorbitol monolaurate, POE-sorbitol monooleate, POE-sorbitol pentaoleate, POE-sorbitol monostearate, etc.); POE-glycerin fatty acid esters (e.g., POE-glycerin monostearate, POE-monoleates such as POE-glycerin monoisostearate and POE-glycerin triisostearate); POE-fatty acid esters (e.g., POE-distearate, POE-monodiooleate, ethylene glycol distearate, etc.); POE-alkyl ethers (e.g., POE-lauryl ether, POE-oleyl ether, POE-stearyl ether, POE-behenyl ether, POE-2-octyldodecyl ether, POE-cholestanol ether, etc.); Pluronic® type (e.g., Pluronic (Registered Trademark) etc.); POE·POP-alkyl ethers (e.g., POE·POP-cetyl ether, POE·POP-2-decyltetradecyl ether, POE·POP-monobutyl ether, POE·POP-hydrogenated lanolin, POE·POP-glycerin ether, etc.); tetraPOE·tetraPOP-ethylenediamine condensates (e.g., Tetronic, etc.); POE-castor oil hydrogenated castor oil derivatives (e.g., POE-castor oil, POE-hydrogenated castor oil, POE-hydrogenated castor oil monoisostearate, POE-hydrogenated castor oil triisostearate) Examples include POE-hydrogenated castor oil monopyroglutamic acid monoisostearate diester, POE-hydrogenated castor oil maleic acid, etc.); POE-beeswax / lanolin derivatives (e.g., POE-sorbitol beeswax, etc.); alkanolamides (e.g., coconut oil fatty acid diethanolamide, lauric acid monoethanolamide, fatty acid isopropanolamide, etc.); POE-propylene glycol fatty acid esters; POE-alkylamines; POE-fatty acid amides; sucrose fatty acid esters; alkylethoxydimethylamine oxide; trioleyl phosphate, etc.

[0037] Examples of lower alcohols include ethanol, propanol, isopropanol, isobutyl alcohol, and t-butyl alcohol.

[0038] Examples of polyhydric alcohols include dihydric alcohols (e.g., ethylene glycol, propylene glycol, trimethylene glycol, 1,2-butanediol, 1,3-butanediol, tetramethylene glycol, 2,3-butanediol, 1,2-pentanediol, 2-butene-1,4-diol, hexylene glycol, octylene glycol, etc.); trihydric alcohols (e.g., glycerin, trimethylolpropane, etc.); tetrahydric alcohols (e.g., pentaerythritol such as 1,2,6-hexanetriol, etc.); pentahydric alcohols (e.g., xylitol, etc.); hexahydric alcohols (e.g., sorbitol, mannitol, etc.); and polyhydric alcohol polymers (e.g., diethylene glycol, dipropylene glycol, triethylene glycol, etc.). Alcohols such as polypropylene glycol, tetraethylene glycol, diglycerin, polyethylene glycol, triglycerin, tetraglycerin, and polyglycerin; divalent alcohol alkyl ethers (e.g., ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene glycol monophenyl ether, ethylene glycol monohexyl ether, ethylene glycol mono-2-methylhexyl ether, ethylene glycol isoamyl ether, ethylene glycol benzyl ether, ethylene glycol isopropyl ether, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethylene glycol dibutyl ether, etc.);Dihydric alcohol alkyl ethers (e.g., diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol butyl ether, diethylene glycol methyl ethyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monobutyl ether, propylene glycol isopropyl ether, dipropylene glycol methyl ether, dipropylene glycol ethyl ether, dipropylene glycol butyl ether, etc.); Dihydric alcohol ether esters (e.g., ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, ethylene glycol monophenyl ether acetate, ethylene glycol diadivate, ethylene glycol di Examples include succinates, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monopropyl ether acetate, propylene glycol monophenyl ether acetate, etc.; glycerin monoalkyl ethers (e.g., xyl alcohol, cerakyl alcohol, batyl alcohol, etc.); sugar alcohols (e.g., sorbitol, maltitol, maltotriose, mannitol, sucrose, erythritol, glucose, fructose, starch-derived sugars, maltose, xylitol, starch-derived sugar-reduced alcohols, etc.); glycerin solids; tetrahydrofurfuryl alcohol; POE-tetrahydrofurfuryl alcohol; POP-butyl ether; POP·POE-butyl ether; tripolyoxypropylene glycerin ether; POP-glycerin ether; POP-glycerin ether phosphate; POP·POE-pentaneerythritol ether, polyglycerin, etc.

[0039] Examples of antioxidants include phosphoric acid, citric acid, ascorbic acid, maleic acid, malonic acid, succinic acid, fumaric acid, kephalin, hexametaphosphorate, phytic acid, and ethylenediaminetetraacetic acid.

[0040] Examples of organic amines include monoethanolamine, diethanolamine, triethanolamine, morpholine, triisopropanolamine, 2-amino-2-methyl-1,3-propanediol, and 2-amino-2-methyl-1-propanol.

[0041] Examples of metal ion chelating agents include 1-hydroxyethane-1,1-diphosphonic acid, tetrasodium 1-hydroxyethane-1,1-diphosphonic acid, disodium edetate, trisodium edetate, tetrasodium edetate, sodium citrate, sodium polyphosphate, sodium metaphosphate, gluconic acid, phosphoric acid, citric acid, ascorbic acid, succinic acid, edetate, and trisodium ethylenediaminehydroxyethyl triacetate.

[0042] Other possible ingredients include, for example, UV absorbers, preservatives (ethylparaben, butylparaben, etc.); whitening agents (for example, placental extract, saxifrage extract, arbutin, etc.); blood circulation promoters (nicotinic acid, benzyl nicotinate, tocopherol nicotinate, β-butoxyester nicotinate, minoxidil or its analogs, vitamin E, γ-oryzanol, alkoxycarbonylpyridine N-oxide, carpronium chloride, acetylcholine or its derivatives, etc.); various extracts (e.g.) Examples include ginger, Phellodendron bark, Coptis japonica, Lithospermum erythrorhizon, birch, loquat, carrot, aloe, mallow, iris, grape, loofah, lily, saffron, Cnidium officinale, ginger, St. John's wort, ononis, garlic, chili pepper, dried tangerine peel, Angelica acutiloba, peony, seaweed, etc.), activators (e.g., panthenyl ethyl ether, nicotinamide, biotin, pantothenic acid, royal jelly, cholesterol derivatives, etc.); and anti-seborrheic agents (e.g., pyridoxines, thianthol, etc.).

[0043] The body cleansing composition of the present invention can be prepared in a liquid or other dosage form, such as body shampoo, body soap, or hand soap.

[0044] (Methods to alleviate winter skin itchiness) The present invention provides a method for reducing winter skin itchiness, which involves washing the user's body with the body cleansing composition of the present invention. There are no particular restrictions on the washing method; by using the body cleansing composition of the present invention and washing the user's body once a day for three days or more, the effect of reducing winter skin itchiness can be obtained. [Examples]

[0045] The following describes embodiments of the present invention, but the present invention is not limited in any way to these embodiments.

[0046] <Preparation of detergent base> Detergent bases were prepared using conventional methods as shown in Table 1.

[0047] [Table 1]

[0048] <Preparation of Polysilicone-13 Emulsion> According to Table 2, Polysilicone-13 (manufactured by Dow Toray Corporation, DOWSIL TM CB-2251 Fluid; 50g of 35% by mass of polysilicone-13 and 65% by mass of hydrogenated polyisobutene, DOWSIL TM 4g of ES-5373 (manufactured by Dow Toray Industries, Ltd., PEG-12 dimethicone) and 1g of Emanone CH-60(K) (manufactured by Kao Corporation, PEG-60 hydrogenated castor oil) were added and heated to 80°C. 45g of purified water heated to 80°C was slowly added to this mixture, and emulsification was carried out using a disperser for 15 minutes. After cooling, a polysilicone-13 emulsion (the pure content of polysilicone-13 in the emulsion was 17.5% by mass) was prepared.

[0049] <Preparation of emulsified products without polysilicone-13> According to Table 2, DOWSIL was used as a comparison target. TM 4g of ES-5373 (manufactured by Dow Toray Industries, Ltd., PEG-12 dimethicone), 1g of Emanone CH-60(K) (manufactured by Kao Corporation, PEG-60 hydrogenated castor oil), and 32.5g of Pearlream 6 (manufactured by NOF Corporation, hydrogenated polyisobutene) were added to 95g of purified water at 80°C, emulsified for 15 minutes using a disperser, and then cooled to prepare an emulsion without polysilicone-13.

[0050] [Table 2]

[0051] (Examples 1-3 and Comparative Example 1) <Preparation of body cleansing compositions> According to Table 3, polysilicone-13 emulsion or polysilicone-13-free emulsion was added to the detergent base prepared in Table 1 to create the body cleansing compositions of Examples 1-3 and Comparative Example 1. A continuous use test was conducted using each of the obtained body cleansing compositions. Specifically, approximately 10-15 g of the body cleansing composition was placed on a foaming net, diluted with tap water (warm water), lathered, used to wash the body, and then rinsed with tap water (warm water).

[0052] Next, the effect of reducing winter skin itching was evaluated as follows. The results are shown in Table 3.

[0053] <Method for evaluating the effectiveness of reducing skin itching in winter> In this study, five subjects who suffered from winter skin itching were tested. The degree of skin itching during the 5-7 day period following the start of continuous use of a body cleansing composition (conducted during the winter months of December to February) was compared to the degree of skin itching before continuous use. The effectiveness of the composition in reducing skin itching was evaluated based on the subjects' self-reported results using the following criteria. During the continuous use trial period, the subjects maintained their normal daily lives. [Evaluation Criteria] ○: Skin itching was reduced in 3 or more subjects. △: Skin itching was reduced in 1-2 subjects. ×: Skin itching did not subside in any of the five subjects.

[0054] [Table 3]

[0055] <Preparation of low-viscosity dimethicone emulsion> According to Table 4, DOWSIL is used for low viscosity dimethicones of various kinematic viscosities. TM 4g of ES-5373 (manufactured by Dow Toray Industries, Ltd., PEG-12 dimethicone) and 1g of Emanone CH-60(K) (manufactured by Kao Corporation, PEG-60 hydrogenated castor oil) were added, heated to 80°C, and then 45g of purified water, also heated to 80°C, was slowly added. Emulsification was carried out using a disperser for 15 minutes, and then cooled to prepare low-viscosity dimethicone emulsions of various kinematic viscosities (the pure content of polysilicone-13 in the emulsion was 50% by mass).

[0056] <Preparation of low-viscosity, dimethicone-free emulsions> According to Table 4, DOWSIL was used as a comparison target. TM 4g of ES-5373 (manufactured by Dow Toray Industries, Ltd., PEG-12 dimethicone) and 1g of Emanone CH-60(K) (manufactured by Kao Corporation, PEG-60 hydrogenated castor oil) were added, and the mixture was heated to 80°C. Then, 95g of purified water, also heated to 80°C, was slowly added, and the mixture was emulsified using a disperser for 15 minutes. After cooling, a low-viscosity emulsion without dimethicone was prepared.

[0057] [Table 4]

[0058] (Examples 4-5 and Comparative Examples 2-4) <Preparation of body cleansing compositions> According to Table 5, low-viscosity dimethicone emulsions of various kinematic viscosities or low-viscosity dimethicone-free emulsions were added to the detergent bases in Table 1 to prepare the body cleansing compositions of Examples 4-5 and Comparative Examples 2-4. Each of the obtained body cleansing compositions was used in a human continuous use test. Specifically, about 10-15 g of each body cleansing composition was placed on a foaming net, diluted with tap water (warm water), lathered, and then used to wash the body, after which it was rinsed off with tap water (warm water).

[0059] Next, the effect of reducing winter skin itching was evaluated in the same manner as in Examples 1-3 and Comparative Example 1. The results are shown in Table 5.

[0060] [Table 5]

[0061] (Examples 6-11) <Preparation of body cleansing compositions> According to Table 6, low-viscosity dimethicone emulsions and polysilicone-13 emulsions of various kinematic viscosities were added to the detergent base in Table 1 to prepare the body cleansing compositions of Examples 6 to 11. Each of the obtained body cleansing compositions was used in a human continuous use test. Specifically, about 10-15 g of each body cleansing composition was placed on a foaming net, diluted with tap water (warm water), lathered, and then used to wash the body, after which it was rinsed off with tap water (warm water).

[0062] Next, the effect of reducing winter skin itching was evaluated in the same manner as in Examples 1-3 and Comparative Example 1. The results are shown in Table 6.

[0063] [Table 6]

[0064] (Prescription example 1) Body shampoos with the formulations shown in Table 7 were prepared by conventional methods. The effect of reducing winter skin itchiness was evaluated in the same manner as in Examples 1-3 and Comparative Example 1, and the result was "○" (good).

[0065] [Table 7]

[0066] (Prescription example 2) Body shampoos with the formulations shown in Table 8 were prepared by conventional methods. The effect of reducing winter skin itchiness was evaluated in the same manner as in Examples 1-3 and Comparative Example 1, and the result was "○" (good).

[0067] [Table 8]

[0068] (Prescription example 3) Body shampoos with the formulations shown in Table 9 were prepared by conventional methods. The effect of reducing winter skin itchiness was evaluated in the same manner as in Examples 1-3 and Comparative Example 1, and the result was "○" (good).

[0069] [Table 9]

Claims

1. A body cleansing composition characterized by containing (A) dimethicone having a kinematic viscosity of 3 cSt or more and less than 20 cSt at 25°C and / or (B) polysilicone-13 represented by the following general formula (1). 【Chemistry 1】 However, in the general formula (1) above, x, y, and z represent repeating numbers and are integers of 1 or greater.

2. The body cleansing composition according to claim 1, wherein the kinematic viscosity of (A) dimethicone at 25°C is 5 cSt or more and 10 cSt or less.

3. The body cleansing composition according to claim 1, comprising (A) dimethicone having a kinematic viscosity of 3 cSt or more and less than 20 cSt at 25°C, and (B) polysilicone-13.

4. The body cleansing composition according to claim 3, wherein the mass ratio (A:B) of (A) dimethicone having a kinematic viscosity of 3 cSt or more and less than 20 cSt at 25°C to (B) polysilicone-13 is 1:9 to 9:

1.

5. The body cleansing composition according to any one of claims 1 to 4, wherein the content of dimethicone having a kinematic viscosity of 3 cSt or more and less than 20 cSt at 25°C is 0.01 to 10% by mass.

6. The body cleansing composition according to any one of claims 1 to 4, wherein the content of (B) polysilicone-13 is 0.1 to 5% by mass.

7. Furthermore, the body cleansing composition according to any one of claims 1 to 4, further comprising (C) an anionic surfactant in an amount of 1 to 30% by mass.

8. A body cleansing composition according to any one of claims 1 to 4, for the purpose of reducing skin itchiness in winter.

9. A method for reducing winter skin itchiness, characterized by washing the user's body with a body cleansing composition according to any one of claims 1 to 4.

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