TWI744393B - Skin cosmetics - Google Patents

Abstract

The present invention provides a skin cosmetic that can cope even when a lot of sweat is generated.

The skin cosmetic of the present invention contains the following components (A) and (B), and the mass ratio (A/B) of the component (A) to the component (B) is 0.01 or more and 2.5 or less.

(A) Cross-linked resin powder with self-adhesive ability

(B) Spherical absorbent powder with a specific surface area of 150m ² /g or more and 1000m ^{2 /g or less}

Description

Skin cosmetics

The present invention relates to a skin cosmetic, especially a skin cosmetic containing powder.

Deodorant cosmetics are used as cosmetics for suppressing the stickiness or odor of sebum or sweat and imparting a cooling sensation. Such deodorant cosmetics are blended with antiperspirant ingredients or antiseptic ingredients. As antiperspirant ingredients, various aluminum compounds with astringent effects, zinc p-phenolsulfonate, etc. are used. As cosmetics containing such antiperspirant ingredients, for example, there are reports: powder solid cosmetics prepared with powder in addition to antiperspirant ingredients and antiseptic ingredients (Patent Document 1), containing silicone gel, polyhydric alcohol fatty acid ester Powder, curing agent and deodorant ingredient deodorant stick (Patent Document 2), antiperspirant deodorant composition containing aluminum compound, phenolic fungicide, aldehyde fragrance, chelating agent and water (Patent Document 3) Wait.

[Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2010-77094

[Patent Document 2] Japanese Patent Laid-Open No. 2015-3891

[Patent Document 3] Japanese Patent Laid-Open No. 2016-113447

The present invention provides a skin cosmetic containing the following components (A) and (B), and the mass ratio (A/B) of the component (A) to the component (B) is 0.01 or more and 2.5 or less.

(A) Cross-linked resin powder with self-adhesive ability

(B) Spherical absorbent powder with a specific surface area of 150m ² /g or more and 1000m ^{2 /g or less}

In addition, the present invention provides a method for transpiration of sweat, which includes the step of applying the above skin cosmetics to the skin.

In addition, the present invention provides a method for forming a coating film composed of component (A) and component (B) on the surface of the skin, which includes the step of applying the above skin cosmetics to the skin.

In addition, the present invention provides a water evapotranspiration accelerator, comprising: containing the following components (A) and (B), and the mass ratio (A/B) of the component (A) to the component (B) is 0.01 or more and Composition below 2.5.

(A) Cross-linked resin powder with self-adhesive ability

(B) Spherical absorbent powder with a specific surface area of 150m ² /g or more and 1000m ^{2 /g or less}

In the case of a lot of sweating, the conventional antiperspirant component has the problem of not being able to obtain a sufficient effect. For example, antiperspirant ingredients with astringent effects cannot suppress sweat produced during commuting or exercise. In addition, the water-absorbent powder absorbs sweat and cannot cope with a large amount of sweat during commuting.

Therefore, the present invention provides a skin cosmetic that can cope even when a lot of sweat is generated.

Therefore, the inventors of the present invention conducted various studies on skin cosmetics using water-absorbent powders, and found that if the specific surface area is 150m ² /g or more and 1000m ² /g or less, and the water-absorbent powder has the same The combination of viscous cross-linked resin powders will quickly evaporate the sweat absorbed by the above-mentioned water-absorbent powders to quickly evaporate a large amount of sweat, and even if a large amount of sweat is produced, the above-mentioned water-absorbent powders will remain on the skin, and Even if rubbed, it does not disappear from the skin, thereby completing the above-mentioned present invention.

If the skin cosmetic of the present invention is applied to the skin, a coating film composed of the component (A) and the component (B) is formed on the skin, and the specific surface area of the component (B) is 150m ² /g or more and 1000m ^{The sweat absorbed by the absorbent powder below 2} /g evaporates quickly, and a large amount of sweat is quickly evaporated, and even if a large amount of sweat is produced, the component (B), the absorbent powder, remains on the skin, and even if it is rubbed Disappear from the skin. Therefore, the skin cosmetic of the present invention exerts the function of sweat transpiration for a long time, that is, even when a large amount of sweat is generated, it quickly absorbs sweat to dry it, and does not disappear from the skin due to sweat or friction.

The component (A) used in the skin cosmetic of the present invention is a cross-linked resin powder with self-adhesive ability. Due to the self-adhesive ability of the component (A), when applied to the skin at the same time as the component (B), a composite coating film of the component (A) and the component (B) is formed on the skin surface. The formed composite coating film utilizes the excellent water absorption formed by the component (B) to absorb sweat, and exhibits quick-drying of sweat, and also exhibits excellent friction resistance.

As the component (A), the self-adhesive cross-linked resin powder is preferably selected from cross-linked (meth)acrylates from the viewpoint of water diffusibility, friction resistance, and water resistance of the coating film One or more of resin powder, spherical silicone elastomer powder and urethane resin powder, more preferably crosslinked (meth)acrylate resin powder. In this specification, the term "(meth)acrylic acid" includes the concepts of both acrylic acid and methacrylic acid.

The crosslinked (meth)acrylate resin powder is a crosslinked resin powder having at least a repeating unit derived from a (meth)acrylate monomer. As such a crosslinked (meth)acrylate resin powder, the resin powder described in JP 2006-225311 A can be mentioned. Examples of monomers other than the (meth)acrylate monomer include polymerizable vinyl group-containing monomers such as methacrylic acid, styrene, and divinylbenzene.

As a (meth)acrylate monomer, the alkyl (meth)acrylate whose carbon number of an alkyl group is 1-18 from a viewpoint of self-adhesion is preferable. Specifically, examples include: methyl (meth)acrylate, ethyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, 2-ethyl (meth)acrylate Base hexyl ester, lauryl (meth)acrylate, stearyl (meth)acrylate, etc. Among them, from the viewpoint of self-adhesiveness, it is particularly preferable that the carbon number of alkyl groups such as butyl (meth)acrylate, lauryl (meth)acrylate, and stearyl (meth)acrylate is 4 ~18 alkyl (meth)acrylate. These can also be used in combination of plural kinds. The ratio of the (meth)acrylate monomer in the total monomer components (also including the following crosslinkable monomers. The same applies hereinafter) From the viewpoint of the uniformity of the composite coating film, it is preferably 30-98 mass %, more preferably 50-85% by mass.

Examples of the monomer having a carboxyl group include (meth)acrylic acid, maleic acid, fumaric acid, crotonic acid, itaconic acid, and the like. These can also be used in combination of plural kinds. From the viewpoint of the water diffusibility of the coating film, the ratio of the monomer having a carboxyl group in the total monomer components is preferably 0.1 to 30% by mass, more preferably 1 to 10% by mass.

A part of the carboxyl groups contained in the crosslinked (meth)acrylate resin powder may also be neutralized. The base used for neutralization is preferably an inorganic base such as sodium hydroxide, potassium hydroxide, and ammonia, and organic bases such as amines, alkanolamines, and basic amino acids may also be used. From the viewpoint of the water diffusibility of the coating film, the degree of neutralization is preferably 1 to 30%, and particularly preferably 1 to 20%. Here, the degree of neutralization means the ratio of the number of moles of the added base to the number of moles of the carboxyl group of the monomer having a carboxyl group expressed as a percentage.

The monomer component preferably contains a crosslinkable monomer having two or more vinyl groups as a crosslinking agent. Examples of such crosslinkable monomers include ethylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, triethylene glycol di(meth)acrylate, and decyl acetate. Glycol di(meth)acrylate, pentaethylene glycol di(meth)acrylate, 1,3-butanediol di(meth)acrylate, 1,4-butanediol di(meth) Acrylate, 1,6-hexanediol di(meth)acrylate, glycerol di(meth)acrylate, allyl(meth)acrylate, trimethylolpropane tri(meth)acrylate, pentaerythritol Tetra(meth)acrylate, phthalic acid diethylene glycol di(meth)acrylate, caprolactone modified dipentaerythritol hexa(meth)acrylate, caprolactone modified hydroxytrimethyl acetate new (Meth)acrylate-based crosslinking monomers such as pentanediol di(meth)acrylate, (meth)acrylate polyester, (meth)acrylate urethane, divinylbenzene, divinyl Aromatic divinyl monomers such as naphthalene and its derivatives. These can also be used 1 type or in combination of 2 or more types. Among these crosslinkable monomers, from the viewpoint of the dry touch of the coating film, more preferred are ethylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, and triethylene glycol di(meth)acrylate. Ethylene glycol di(meth)acrylate, 1,3-butanediol di(meth)acrylate, 1,4-butanediol di(meth)acrylate, 1,6-hexanediol di( Meth) acrylate and other (poly) alkylene glycol di(meth)acrylate, caprolactone modified dipentaerythritol hexa(meth)acrylate, caprolactone modified hydroxytrimethyl acetate new Pentylene glycol di(meth)acrylate, (meth)acrylate polyester. Preferably, these crosslinkable monomers are used in such a manner that they are 3 to 50% by mass relative to the total monomer components.

As a monomer component, in addition to the above-mentioned (meth)acrylate monomer, the monomer which has a carboxyl group, and a crosslinkable monomer, you may copolymerize other monomers which can be copolymerized with these. Examples of other monomers include styrene, (meth)acrylonitrile, (meth)acrylamide, vinyl acetate, and vinylpyrrolidone.

The crosslinked resin powder can be polymerized by aqueous suspension polymerization of monomer components including the above-mentioned (meth)acrylate monomer, carboxyl group-containing monomer, and crosslinkable monomer using a dispersant, polymerization initiator, etc., for example. , Emulsion polymerization, seed polymerization, dispersion polymerization, etc. are obtained by polymerization. Among them, the aqueous suspension polymerization method is preferred from the viewpoint of easily obtaining a spherical resin powder with a uniform particle diameter.

Examples of the spherical silicone elastomer powder include cross-linked methyl polysiloxane. Cross-linked methyl polysiloxane is obtained by adding a small amount of methyl trimethoxy siloxane to dimethoxy dimethyl siloxane for polymerization, and has cross-linking of methyl trimethoxy siloxane inside structure. This can be produced by emulsion polymerization, and specifically, it can include Trefil series (Trefil E506W, Trefil E505C, Trefil E506C, Trefil E505W, etc.) manufactured by Toray Dow Corning Silicone Co., Ltd. In addition, these may be used alone or in combination, or they may be dispersed in various solvents or the like without any problem or mixed with other components beforehand. Examples of these include Trefil E507 liquid, BY29-129, BY29-122, and the like. In addition, there can also be mentioned: silicone resin/rubber composite powder, namely X-52-1139K and X-52-1139G manufactured by Shin-Etsu Chemical Industry Co., Ltd.

Examples of the urethane resin powder include: self-emulsifying polyurethane dispersions, core-shell acrylic urethanes with acrylic resin as the core and urethane as the shell structure. Acid ester dispersion. The polyurethane dispersion is manufactured from a diisocyanate polymer and a diol monomer. Specifically, WBR-2101 manufactured by TAISEI FINE CHEMICAL can be mentioned. On the other hand, core-shell acrylic urethane dispersions include WEM-200 manufactured by TAISEI FINE CHEMICAL, and DAITOSOL U9-40 manufactured by Dato Chemical Co., Ltd.

The average particle size of the component (A) is preferably 0.09 μm or more, more preferably, from the viewpoints of good friction resistance, water resistance, and excellent water absorption (water diffusibility) of the coating film formed on the skin It is 0.2 μm or more, more preferably 0.3 μm or more, more preferably 20 μm or less, more preferably 10 μm or less, still more preferably 5 μm or less, and still more preferably 2.2 μm or less. The specific average particle size is preferably in the range of 0.09 to 20 μm, more preferably 0.2 to 10 μm, still more preferably 0.3 to 5 μm, and still more preferably 0.3 to 2.2 μm.

In the present invention, the average particle size is the average particle size when the powder is monodispersed, and is the volume average particle size of the particle size measured by the static light scattering method.

In addition, the shape of the component (A) may include a spherical shape, a substantially spherical shape, a granular shape, etc., and a spherical shape or a substantially spherical shape is preferable in terms of the feeling in use and the sweat resistance of the coating film.

The component (A) is preferably a crosslinked resin powder having a glass transition temperature (Tg) of 20°C or less in terms of self-adhesive ability. The Tg is more preferably 0°C or lower, and still more preferably -5°C or lower. Here, the glass transition temperature is the temperature measured by differential scanning calorimetry (DSC). The glass transition temperature (Tg) of the homopolymer of the alkyl (meth)acrylate as a monomer component is preferably 20°C or less, more preferably 0°C or less, and still more preferably -5°C or less. Examples of such alkyl (meth)acrylates include butyl acrylate (Tg: -54°C), second butyl acrylate (Tg: -22°C), and 2-ethylhexyl acrylate (Tg: -70°C), 2-ethylhexyl methacrylate (-10°C), octyl acrylate (Tg: -65°C), octyl methacrylate (Tg: -20°C), nonyl acrylate (Tg: -58°C), dodecyl acrylate (Tg: -3°C), dodecyl methacrylate (Tg: -65°C), and the like.

The use of the skin cosmetic of the present invention, component (B) based specific surface area of 150m ² / g or more and the water-absorbing powder 1000m ² / g or less of the ball. In the present invention, the component (B) absorbs a large amount of sweat due to its water absorption and a specific surface area of 150m ² /g or more and 1000m ² /g or less, so that the water quickly diffuses to the component (A) and the skin formed on the skin. In the composite coating film of component (B), it promotes evaporation. If the water absorption and specific surface area are 150m ² /g or more and 1000m ² /g or less, the oil absorption can be obtained by using JIS K 5101-13-1 <General test method for determining the oil absorption of pigments and extender pigments> And confirm. The average oil absorption of the powder is preferably 90mL/100g or more, more preferably 140mL/100g or more, still more preferably 150mL/100g or more, and still more preferably 300mL/100g or more. Furthermore, the upper limit of oil absorption is about 500mL/100g.

The specific surface area is measured according to the gas adsorption method (JIS Z 8830: 2001 method for measuring the specific surface area of powder (solid) by gas adsorption).

Component (B) in terms of the specific surface area and the diffusion of water in terms of evapotranspiration, preferably 200m ² / g or more, more preferably 250m ² / g or more, and, preferably 900m ² / g or less, more preferably 800m ² / g or less, and further preferably 700m ² / g or less.

Moreover, in terms of the feeling in use and the sweat resistance of the coating film, the shape of the component (B) is preferably spherical.

As the component (B) and the water-absorbing specific surface area of 150m ² / g or more and 1000m ² / g or less of a powder, may include: a porous silicon oxide powder, porous calcium carbonate and porous nylon powder and the like, wherein From the viewpoint of water diffusibility and evapotranspiration, porous silica is more preferable. Here, porous silica includes hollow porous silica. Commercial products of porous silica include Sunsphere series (AGC Si-Tech) and Goddball series (Suzuki Oil & Fat Co., Ltd.).

From the viewpoint of excellent water absorption (water diffusibility) of the coating film formed on the skin, the average particle size of the component (B) is preferably 0.5 μm or more, more preferably 3 μm or more, and still more preferably 5 μm or more It is still more preferably 10 μm or more, and from the viewpoint of the friction resistance and water resistance of the coating film, it is preferably 50 μm or less, more preferably 30 μm or less, and still more preferably 20 μm or less. The range of the specific average particle size is preferably 0.5-50 μm, more preferably 3-30 μm, still more preferably 5-30 μm, and still more preferably 10-20 μm.

In the present invention, the average particle size is the average particle size when the powder is monodispersed, and is the volume average particle size of the particle size measured by the static light scattering method.

In the skin cosmetic of the present invention, in terms of ensuring the water absorption (water diffusibility), friction resistance, and water resistance of the coating film formed on the skin, the quality of component (A) relative to component (B) The ratio (A/B) is 0.01 or more and 2.5 or less. A/B is preferably 0.01 or more and 2.0 or less, more preferably 0.01 or more and 1.0 or less, still more preferably 0.01 or more and 0.8 or less, still more preferably 0.05 or more and 0.8 or less, and particularly preferably 0.10 or more and 0.4 or less. The water absorption of the coating film can be evaluated in the form of the water diffusibility of the coating film shown in the following examples.

Ingredient (A) and ingredient (B) only need to be contained in the skin cosmetic of the present invention in the above-mentioned mass ratio, and the content of ingredient (A) ensures the water absorption (water diffusibility) and resistance of the coating film formed on the skin From the viewpoint of friction and water resistance, it is preferably 0.01% by mass or more in the total amount of cosmetics, more preferably 0.02% by mass or more, still more preferably 0.05% by mass or more, and still more preferably 1.0% by mass or more , And more preferably 1.5% by mass or more, and still more preferably 2.0% by mass or more. In addition, it is preferably 20% by mass or less, more preferably 12% by mass or less, still more preferably 10% by mass or less, and still more preferably 5% by mass or less. The content of the specific component (A) is preferably 0.01% by mass or more and 20% by mass or less, more preferably 0.02% by mass or more and 12% by mass or less, still more preferably 0.05% by mass or more and 10% by mass or less, and still more It is preferably 1.0% by mass or more and 10% by mass or less, more preferably 1.5% by mass or more and 10% by mass or less, and still more preferably 2.0% by mass or more and 10% by mass or less. From the same viewpoint, the content of component (B) is preferably 3% by mass or more in the total amount of cosmetics, more preferably 5% by mass or more, still more preferably 6% by mass or more, and still more preferably 10 Above mass%. Moreover, it is preferably 30% by mass or less, more preferably 18% by mass or less, and still more preferably 15% by mass or less. The content of the specific component (B) is preferably 3 mass% or more and 30 mass% or less, more preferably 5 mass% or more and 18 mass% or less, still more preferably 6 mass% or more and 15 mass% or less, and still more Preferably it is 9 mass% or more and 15 mass% or less.

If the skin cosmetic of the present invention is applied to the skin, it will form a coating film containing a composite of component (A) and component (B) on the skin surface, which has excellent water absorption (water diffusibility) and exhibits excellent friction resistance , Water resistance, so it can be especially used as a cosmetic for sweat evaporation and a deodorant cosmetic.

In addition, the composition containing the component (A) and the component (B), and the mass ratio (A/B) of the component (A) to the component (B) is 0.01 or more and 2.5 or less, because the composition exhibits excellent water absorption (water Diffusibility), and shows excellent friction resistance and water resistance, so it can be used as an evapotranspiration accelerator for sweat-containing water.

In addition to the above-mentioned ingredients, the skin cosmetic of the present invention may contain: ingredient (C) bactericide, antiperspirant, powder, oils, waxes, silicones, hydrocarbon oils, higher fatty acids, higher alcohols, synthetic ester oils , Other surfactants, polymer compounds, antioxidants, pigments, emulsion stabilizers, pH adjusters, astringents, preservatives, UV absorbers, chelating agents, moisturizers, thickeners, cooling agents, anti-inflammatory agents, Amino acids, vitamins, various plant extracts, etc.

Examples of the bactericide of component (C) include: isopropyl methylphenol, triclosan, benzalkonium chloride, benzonine chloride, halocaban, triclosan, and chlorhexidine hydrochloride Dine, chlorhexidine gluconate, beta glycyrrhetinic acid. Among them, isopropyl methylphenol is preferred.

The skin cosmetic of the present invention formulated with a fungicide can be used as a deodorant cosmetic.

Here, as the bactericide of component (C), it is preferable to contain isopropyl methylphenol, and the content of component (C) in the total amount of cosmetics is preferable in terms of bactericidal effect and residual property on the skin It is 0.01 to 0.2 mass%, more preferably 0.02 to 0.15 mass%, and still more preferably 0.05 to 0.1 mass%.

In addition, the skin cosmetics of the present invention are preferable in terms of deodorization effect utilizing excellent sterilization effect, residual properties of sterilization components on the skin (sustainability of sterilization and deodorization effects), and feeling of use (anti-stickiness), etc. In addition to the bactericide of component (C), it is a non-ionic surfactant which is selected from component (D) carboxylic acid or its salt, component (E) 1,3-butanediol, and component (F) HLB10~13 One or more of them.

The carboxylic acid or its salt of the component (D) is preferably an organic carboxylic acid or its salt having a carbon number of 1 or more and 8 or less, and more preferably an organic carboxylic acid or its salt having a carbon number of 3 or more and 8 or less.

Specific examples of the carboxylic acid of component (D) include monocarboxylic acids such as acetic acid, propionic acid, and caprylic acid; malonic acid, succinic acid, glutaric acid, adipic acid, maleic acid, trans Dicarboxylic acids such as butenedioic acid; hydroxycarboxylic acids such as glycolic acid, lactic acid, hydroxyacrylic acid, glyceric acid, malic acid, tartaric acid, and citric acid; aromatic carboxylic acids such as benzoic acid, salicylic acid and phthalic acid; glutamine acid , Aspartic acid and other acidic amino acids.

In addition, specific examples of the counter ion constituting the salt include: alkali metals such as sodium and potassium; alkaline earth metals such as calcium and magnesium; ammonium; alkanolamines such as monoethanolamine, diethanolamine, and triethanolamine; and derived from spermine The cation of basic amino acid such as acid and lysine. The salt is preferably an alkali metal salt, more preferably a sodium salt.

Component (D) is preferably selected from the group consisting of dicarboxylic acid, hydroxycarboxylic acid, and salts thereof from the viewpoint of sterilizing effect (deodorizing effect) and leaving component (C) on the skin. One or two or more, more preferably one or two or more selected from the group consisting of succinic acid, adipic acid, citric acid, and these salts.

The content of ingredient (D) is preferably 0.1 in the total amount of cosmetics from the viewpoint of the sterilization effect (deodorizing effect), the viewpoint that the ingredient (C) remains on the skin, and the viewpoint of the long-term stability of the ingredient (C) ~3% by mass, more preferably 0.2 to 2.8% by mass, and still more preferably 0.5 to 2.5% by mass.

The 1,3-butanediol of the component (E) has the effect of leaving a sufficient amount of the component (C) on the skin, and contributes to the long-term storage stability of the component (C).

The content of ingredient (E) is preferably in the total amount of cosmetics from the viewpoint of obtaining a sufficient sterilization effect, the viewpoint of the residue of ingredient (C) on the skin, the viewpoint of long-term storage stability, the feeling of use, and the cold feeling. The amount is 0.1 to 10% by mass, more preferably 0.5 to 8% by mass, and still more preferably 1 to 5% by mass.

By blending the nonionic surfactants of HLB10~13 of component (F), the residue of component (C) on the skin is improved, and the long-term storage stability of component (C) is improved. Component (F) is more preferably HLB11-13, and more preferably HLB12-13 in terms of improving the residue of component (C) and improving long-term storage stability.

In the present invention, the HLB value is an indicator of the Hydrophilic Lipophile Balance (Hydrophile Lipophile Balance). In the present invention, the value calculated by Oda, Teramura and others using the following formula is used. In addition, the HLB value is the value of each nonionic surfactant before blending.

The component (F) is preferably a polyoxyethylene alkyl ether or polyoxyethylene alkenyl ether having an alkyl or alkenyl group with 10 to 18 carbons (hereinafter, also referred to as polyoxyethylene alkyl in the present invention). ether).

The above-mentioned carbon number represents the carbon number of the alkyl group or alkenyl group of the polyoxyethylene alkyl ether constituting the component (F). From the viewpoint of improving the residual property of the component (C) on the skin and the long-term storage stability, it is preferably The carbon number is 10-16, more preferably the carbon number is 12-14.

From the same viewpoint, a polyoxyethylene alkyl ether having an alkyl group is preferred.

Specifically, polyoxyethylene lauryl ether (carbon number 12, HLB10-13), polyoxyethylene tetradecyl ether (carbon number 14, HLB10-13), polyoxyethylene hexadecyl ether (carbon number 16, HLB10-13), polyoxyethylene hexadecyl ether (carbon number 16, HLB10-13), HLB10-13), polyoxyethylene oleyl ether (carbon number 18, HLB10-13), etc., as preferred ones, polyoxyethylene lauryl ether can be mentioned.

The number of moles of addition of the ethylene oxide of the component (F) polyoxyethylene alkyl ether is preferably 3-9 from the viewpoint of the residual property of the component (C) on the skin and the long-term storage stability, and more Preferably it is 4-8, More preferably, it is 5-7.

The content of ingredient (F) is preferably 0.01 to 1% by mass in the total amount of cosmetics, more preferably 0.01, from the viewpoint of the residue of the ingredient (C) on the skin and the viewpoint of long-term storage stability ~0.8% by mass, more preferably 0.01 to 0.5% by mass.

From the viewpoint of further improving the residual property of the ingredient (C) on the skin and the cooling sensation, it is preferable that the skin cosmetic of the present invention contains the ingredient (G) with an HLB value of 4 to 7, and is liquid at 25°C. Non-ionic surfactant with glycerin-like form.

The so-called liquid at 25°C means the viscosity at 25°C below 100,000 mPa‧s.

As the component (G) nonionic surfactant, it is preferably a branched alkyl or alkenyl group having a carbon number of 8 to 22, which is bonded to glyceryl ether or ester, or through an alkylene oxide bond Ender.

As the nonionic surfactant of component (G), for example, it is preferably selected from alkyl glycerol ethers, glycerin fatty acid esters, polyglycerin fatty acid esters, polyoxyethylene glyceryl ether fatty acid esters, and polyoxyethylene hydrogenated castor oil. , Polyoxyethylene hydrogenated castor oil fatty acid ester and other selected one or more than two types. Among them, from the viewpoint of improving the residual property of the component (A) on the skin and the cooling sensation, one or more selected from alkyl glyceryl ethers and glycerin fatty acid esters are preferred, and self-alkane is more preferred. One or more of glyceryl ethers.

As such a component (G), for example, isostearyl glyceryl ether (HLB5.4), 2-ethylhexyl glyceryl ether (HLB7), glyceryl monoisostearate (HLB6), monoisostearate Stearic acid (degree of polymerization 2) polyglycerol ester (HLB5.5), polyoxyethylene monoisostearate (5) hydrogenated castor oil (HLB4), polyoxyethylene monoisostearate (10) hydrogenated castor Sesame oil (HLB5), polyoxyethylene monoisostearate (15) hydrogenated castor oil (HLB7), polyoxyethylene triisostearate (10) hydrogenated castor oil (HLB4), polyoxytriisostearate Vinyl ester (15) hydrogenated castor oil (HLB5), polyoxyethylene triisostearate (20) hydrogenated castor oil (HLB6), polyoxyethylene triisostearate (30) hydrogenated castor oil (HLB7), etc. .

Among them, from the viewpoint of improving the residual property of the ingredient (C) on the skin and the cold feeling, isostearyl glyceryl ether, 2-ethylhexyl glyceryl ether, and glyceryl monoisostearate are preferred The ester is preferably isostearyl glyceryl ether in terms of feeling in use.

The content of ingredient (G) is preferably 0.01~1% by mass in the total amount of cosmetics from the viewpoint of obtaining sufficient sterilization effect and improving the residual property and cooling sensation of ingredient (C) on the skin , More preferably 0.01 to 0.8 mass%, and still more preferably 0.01 to 0.5 mass%.

The dosage form of the skin cosmetic of the present invention is not particularly limited. Examples include: cream, roll-on type, mist, lotion, aerosol, spray, stick, etc., in the form of cream, roll-on, mist The form of agent, spray or lotion is better in terms of enhancing antiperspirant effect and bactericidal effect.

When the skin cosmetic of the present invention is in the form of a cream, in addition to the above-mentioned ingredients, it may contain a solid oily ingredient with a melting point of 60°C or higher as ingredient (H), and a poly(I) as ingredient (I). Ether-modified silicone, powders other than component (A) and component (B) as component (J), antioxidant as component (K), and poly(N-alanylalkylene) as component (L) Amine) bonded silicone polymer selected from one or two or more types.

Component (H) has a solid oily component with a melting point of 60°C or higher, which has a melting point of 60°C or higher, and is solid at room temperature (25°C), preferably having a melting point of 60 to 110°C.

By using this high melting point oily ingredient, the sterilization effect can be improved and a smooth feeling of use can be obtained.

In the present invention, the melting point is a value obtained by measurement using Quasi-drug Material Specification I (General Test Method, 70. Melting Point Measuring Method, Method 1).

The oily component is usually used for external skin preparations, including: hydrocarbons, waxes, esters, silicones and other solid oils, animal waxes, vegetable waxes, mineral waxes, synthetic waxes, Choose among these mixtures. For example, paraffin wax, ozokerite wax, synthetic hydrocarbon wax, Fischer-Tropsch wax, microcrystalline wax, polyethylene wax, ethylene propylene copolymer, candelilla wax, beeswax, carnauba wax, etc. can be exemplified.

Among them, hydrocarbons are preferred, and in terms of feeling of use, ozokerite wax (melting point 72~76°C), microcrystalline wax (melting point 60~85°C), polyethylene wax (melting point 75~105 ℃), paraffin wax (melting point 70~78℃).

The content of component (H) is preferably 0.5-10% by mass in the total amount of cosmetics, more preferably 0.5-8% by mass, and still more preferably 1-6% by mass in terms of sterilization effect and usability. .

By using the polyether modified silicone of ingredient (I), an excellent sterilization effect and a good feeling of use (non-sticky) can be obtained. The polyether-modified silicone of component (I) may be dimethylpolysiloxane having a polyoxyethylene group or a polyoxypropylene group. For example, the following formula (1) or Among these, what is represented by formula (2) may be used individually by 1 type, or may be used in combination of 2 or more types.

[In formula (1), R ¹ is -(CH ₂ ) ₃ -O-(C ₂ H ₄ O) _p -(C ₃ H ₆ O) _q -A (where A represents a hydrogen atom or carbon number 1~ The alkyl group of 12, p and q each independently represent an integer of 0-50, and p+q≧1), R ^{2 is} independently methyl or -(CH ₂ ) ₃ -O-(C ₂ H ₄ O) _s -(C ₃ H ₆ O) _t -B (where B represents a hydrogen atom or an alkyl group with 1-12 carbons, s and t each independently represent an integer of 0-50, and s+t≧1), m represents an integer from 1 to 2000, and n represents an integer from 0 to 1000. Among them, when n is 0, at least one of ^{R 2} _{is -(CH 2} ) ₃ -O-(C ₂ H ₄ O) _s -(C ₃ H ₆ O) _t -B (where B, s and t have the same meaning as above). ]

[化2]

[In formula (2), r represents an integer from 1 to 20, and x, y, and z each independently represent an integer from 1 to 500. ]

As a commercially available product of the component (I), KF6011, KF6012, KF6013, KF6015, KF6016, KF6017, KF6028 (all manufactured by Shin-Etsu Chemical Co., Ltd.) and the like can be mentioned.

The content of ingredient (I) is preferably 0.01-10% by mass in the total amount of cosmetics, more preferably 0.05-5% by mass, and still more preferably 0.1-3% by mass, in terms of sterilization effect and usability. .

By using the component (A) as the component (J) and powder other than the component (B), the bactericidal effect can be improved and a good feeling of use can be obtained. As component (J), powders other than component (A) and component (B), either component (J-1) organic powder or component (J-2) inorganic powder can be used alone, or Use in combination of two or more types. In addition, the shape may be any of a spherical shape, a needle shape, and a plate shape. In addition, it may be treated with alumina, silicon oxide, zinc, etc., or treated with silicone, etc., for hydrophobic treatment.

Examples of the organic powder of the above-mentioned component (J-1) include: lauric acid, methyl polysiloxane network polymer, polyamide powder, polyester powder, polyethylene powder, polypropylene powder , Polystyrene powder, polyurethane, benzoguanamine powder, polymethylbenzoguanamine powder, tetrafluoroethylene powder, etc.

In addition, examples of the inorganic powder of the above-mentioned component (J-2) include: titanium oxide, zirconium oxide, zinc oxide, cerium oxide, magnesium oxide, barium sulfate, calcium sulfate, magnesium sulfate, calcium carbonate, magnesium carbonate, and talc , Mica, kaolin, sericite, muscovite, synthetic mica, phlogopite, red mica, biotite, lepidolite, aluminum silicate, magnesium silicate, magnesium aluminum silicate, calcium silicate, barium silicate, silicic acid Strontium, metal tungstate, etc.

Among the component (J), it is more preferable to contain one or more selected from the methyl polysiloxane network polymer. The methyl polysiloxane network polymerization system has been commercially available as a raw material for cosmetics, and it can be used without limitation. Among them, it is preferably spherical and has an average particle diameter in the range of 1.0 to 30.0 μm, and more preferably 4.0 to 15 μm. Furthermore, in the present invention, the average particle size is the average particle size when the powder is monodispersed, and is the volume average particle size of the particle size measured by the static light scattering method.

The so-called methylsiloxane network polymer refers to a solid product obtained by emulsifying and polymerizing methyltrimethoxysiloxane in an alkaline aqueous solution. Specifically, it can include: Tospearl manufactured by GE Toshiba Silicone Co., Ltd. Series (Tospearl 145A etc.). Among them, in terms of smoothness, the Tospearl series of methylsiloxane network polymer is particularly preferred.

The content of the powder of ingredient (J) is preferably 1-20% by mass in the total amount of skin cosmetics, more preferably 2-10% by mass, and still more preferably 2~5 mass%.

Examples of antioxidants for ingredient (K) include: dibutyl hydroxytoluene (BHT); vitamin E such as butyl hydroxy benzene, δ tocopherol, and derivatives thereof; thiotaurine, evening primrose extract, Beta carotene, catechin compounds, flavonoid compounds, polyphenol compounds, etc. Catechin compounds can be used as green tea extracts and the like. Among them, from the viewpoint of improving the usability, dibutylhydroxytoluene (BHT) or δ tocopherol is preferred. These antioxidants may be used alone or in combination of two or more.

From the viewpoint of oxidation prevention, the content of ingredient (K) is preferably 0.001% by mass or more in the total amount of skin cosmetics, and more preferably 0.005% by mass or more, from the viewpoint of reducing the stickiness after application In particular, the content is preferably 1% by mass or less, and particularly preferably 0.5% by mass or less.

As the component (L), poly(N-alkylideneimine)-bonded silicone polymer includes: at the end of the polyorganosiloxane segment or at least one of the branched silicon atoms through The heteroatom-containing alkylene bond includes a silicone-based polymer composed of poly(N-acylalkyleneimine) which is a repeating unit represented by the following formula (3).

(In the formula, R ³ represents a hydrogen atom, a C 1-22 alkyl group, cycloalkyl group, aralkyl group or aryl group, and l represents the number of 2 or 3)

As a preferable example of the silicone-based polymer, poly(N-methylethyleneimine) modified silicone, poly(N-acetylethyleneimine) modified silicone, Poly(N-propylethylenimine) modified silicone, poly(N-octylethyleneimide) modified silicone, poly(N-dodecylethyleneimide) Modified silicone, poly(N-acetoxypropyleneimide) modified silicone, poly(N-acetoxypropyleneimide) modified silicone, poly(N-acetoxypropyleneimide) modified silicone ) Modified silicone, poly (N-octyl propylene imide) modified silicone, poly (N-octyl propylene imide) modified silicone, poly (N-dodecane Base propylene imine) modified silicone and so on.

The content of ingredient (L) is preferably 0.1-10% by mass in the total amount of skin cosmetics, more preferably 0.2-8% by mass, and still more preferably 0.5-6% by mass in terms of dry feeling in use .

The skin cosmetics of the present invention can be made into roller-type cosmetics. Here, the so-called roll-on type refers to a cosmetic made of a roll-on container filled with a cosmetic composition, and a roller is applied to the application site and applied. Roll-on cosmetics can contain lower alcohols with 2 to 4 carbon atoms as ingredient (M), water-soluble polymers as ingredient (N), sorbitan monooleate and sorbitol as ingredient (O) Anhydride trioleate, sorbitol anhydride monoisostearate, polyoxyethylene oleyl ether and triisostearate polyoxyethylene glycerol are selected from one or more of the group consisting of one or more of them as components ( P) Trimethylsilyloxysilicic acid and poly(N-alkyleneimine) bonded silicone polymer as component (L) are selected from one or two or more types.

As the component (M), the lower alcohol having 2 to 4 carbon atoms is preferably ethanol. The content of the lower alcohol with a carbon number of 2 to 4 of the component (M) is preferably 20 to 80% by mass, and more preferably 40 to 60% by mass in terms of usability and cooling sensation.

By containing the water-soluble polymer of ingredient (N), the residual property of the bactericide of ingredient (C) on the skin can be improved. As the water-soluble polymer, any of natural polymer, semi-synthetic polymer, and synthetic polymer can be used.

As examples of natural polymers, sanxian gum, carrageenan, alginic acid, and the like can be cited. Examples of semi-synthetic polysaccharide polymers include modified polysaccharides such as hydroxycellulose, hydroxypropyl cellulose, sodium carboxymethyl cellulose, methyl cellulose, hydroxymethyl cellulose, and cationized cellulose. Examples of synthetic polymers include acrylic polymers such as carbomer (crosslinked polyacrylic acid), polyacrylic acid, sodium polyacrylate, acrylic acid/alkyl methacrylate copolymer; polyvinylpyrrolidone, polyethylene Alcohol, cationized polyvinylpyrrolidone, etc. Among these, carbomer, acrylic acid/alkyl methacrylate copolymer, hydroxypropyl cellulose, and sodium carboxymethyl cellulose are preferred.

Commercial products of Carbomer include: Polycarbonyl 910, Polycarbonyl 934, Polycarbonyl 940, Polycarbonyl 941, Polycarbonyl 980, Polycarbonyl 981 (the above are Lubrizol Advanced Materials, Inc. . Manufacturing), etc., as commercial products of acrylic acid/alkyl methacrylate copolymers, include: polyvinyl carbonyl 1382, polyvinyl carbonyl ETD2020, PEMULEN TR-1, PEMULEN TR-2 (the above are Lubrizol Advanced Materials , Inc.), etc., as commercial products of hydroxypropyl cellulose, HPC-M, HPC-H (manufactured by Soda Japan), etc. can be mentioned, and as commercial products of sodium carboxymethyl cellulose, there can be mentioned Produced by: CMC Daicel (manufactured by Daicel Chemical Industries, Inc.) and the like.

The water-soluble polymer of component (N) can be used in one or two or more types, and its content is preferably 0.01 in the total amount of cosmetics in terms of the residual property of component (C) on the skin and the feeling of use. Mass% or more, more preferably 0.05 mass% or more, preferably 5 mass% or less, more preferably 3 mass% or less. In addition, the content of the component (N) is preferably 0.01 to 5% by mass in the total amount of cosmetics, more preferably 0.05 to 3% by mass.

By containing sorbitan monooleate, sorbitan trioleate, sorbitan monoisostearate, polyoxyethylene oleyl ether and triisostearic acid polyoxyethylene One or two or more selected from the group consisting of glycerides improve the residue of component (C) on the skin and the feeling of use.

The content of ingredient (O) is preferably 0.01 to 3% by mass in the total amount of cosmetics, and more preferably 0.03 to 1% by mass, in terms of the residue of the ingredient (C) on the skin and the feeling of use. More preferably, it is 0.05 to 0.5 mass %.

As component (P), trimethylsilyloxysilicic acid is not limited as long as it is usually used in cosmetics. Any one can be used. It is a compound having a cross-linked structure with a silicone structure as the main skeleton. Preferably, it is represented by [(CH ₃ ) ₃ SiO _1/2 ] _x [SiO ₂ ] _Y (X is 1 to 3, Y is 0.5 to 8).

In addition, the trimethylsilyloxysilicic acid of the component (P) preferably has a weight average molecular weight of 1,000 to 10,000, and more preferably a weight average molecular weight of 1,000 to 10,000, in terms of the residual property of the component (C) on the skin and the feeling of use. 9000, more preferably 3000~6000. In addition, its properties may be any of liquid, gel, paste, solid, etc. at 25°C, and it is preferably solid. In addition, from the viewpoint of formulation properties, it is preferable to dilute the solution or dispersion with a solvent, or to mix the solution or dispersion in advance. As a solvent for diluting or dispersing the trimethylsiloxysilicic acid of the component (P), it is preferably selected from dimethylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, One or more of isododecane selected, more preferably volatile dimethyl polysiloxane and decamethyl cyclopentasiloxane. Furthermore, the so-called volatility refers to those with a flash point of 35~90℃.

As a commercially available product of the component (P), KF-7312T, KF-7312J, KF-7312K (manufactured by Shin-Etsu Chemical Co., Ltd.), etc. previously dissolved in a solvent can be preferably used.

The content of ingredient (P) is preferably 0.005 to 2% by mass in the total amount of cosmetics, and more preferably 0.008 to 1% by mass, in terms of the residual property of ingredient (C) on the skin and the feeling of use. More preferably, it is 0.01 to 0.5 mass %.

In the case of the ball type, in terms of the residual property of the component (C) fungicide on the skin and the feeling of use, the component (L) poly(N-alkyleneimine) is bonded to the silicone polymer The content is preferably 0.3 to 5% by mass in the total amount of cosmetics, more preferably 0.4 to 4% by mass, and still more preferably 0.5 to 3% by mass.

When the skin cosmetic of the present invention is in the form of a mist, spray or lotion, it may contain polyoxyethylene polyoxypropylene decyl myristyl ether (Q) in addition to the above-mentioned components. For example, one or more of PPG-6 decyltetradecyl tetradeceth-30) and component (I) polyether modified silicone are selected.

The content of ingredient (Q) is preferably 0.05-2% by mass in the total amount of cosmetics, more preferably 0.08-1% by mass, and still more preferably 0.1-0.5 in terms of cooling sensation and long-term storage stability quality%.

In the case of mists, sprays or lotions, the content of ingredient (I) is preferably 0.05-2% by mass in the total amount of cosmetics in terms of skin smoothness, affinity, and stability over time. It is more preferably 0.08 to 1.5% by mass, and still more preferably 0.1 to 1% by mass.

Since the cosmetic of the present invention is used in various forms as described above, the component (A) and the component (B) and other components can be added and mixed, heated as necessary, and filled into containers suitable for various forms to be manufactured.

The content of the antiperspirant in the skin cosmetic of the present invention is preferably 10% by mass or less, more preferably 5% by mass or less, and even more preferably 1 mass from the viewpoint of maintaining the refreshing sensation of evaporation with sweat % Or less, preferably not substantially contained. Examples of the antiperspirant include aluminum hydroxychloride, zinc oxide, zinc phenolsulfonate, and alum.

Regarding the foregoing embodiments, the present invention further discloses the following compositions and methods.

<1> A skin cosmetic containing the following components (A) and (B), and the mass ratio (A/B) of the component (A) to the component (B) is 0.01 or more and 2.5 or less.

(A) Cross-linked resin powder with self-adhesive ability

(B) Spherical absorbent powder with a specific surface area of 150m ² /g or more and 1000m ^{2 /g or less}

<2> The skin cosmetic as described in <1>, wherein the component (A) is preferably self-crosslinking (meth)acrylate resin powder, silicone elastomer spherical powder, and urethane resin One type or two or more types of powders are selected, more preferably a cross-linked (meth)acrylate resin powder.

<3> The skin cosmetic as described in <2>, wherein the crosslinked (meth)acrylate resin powder is preferably a crosslinked resin powder having at least a repeating unit derived from a (meth)acrylate monomer .

<4> The skin cosmetic as described in any one of <1> to <3>, wherein the average particle size of the component (A) is preferably 0.09 μm or more, more preferably 0.2 μm or more, and even more preferably 0.3 μm or more, more preferably 20 μm or less, more preferably 10 μm or less, still more preferably 5 μm or less, and still more preferably 2.2 μm or less.

<5><1> to any one of <4> described a skin cosmetic product of, wherein the component (B) is preferably a specific surface area from 150m ² / g or more and 1000m ² / g or less of a porous silicon oxide powder body surface area 150m ² / g or more and 1000m ² / g or less and the specific surface area of the porous calcium carbonate 150m ² / g or more and 1000m ² / g or less of the choice of porous nylon powder least one, more preferably a specific surface area Porous silica powder of 150m ² /g or more and 1000m ² /g or less.

<6> In the skin cosmetic as described in any one of <1> to <5>, the average particle size of the component (B) is preferably 0.5 μm or more, more preferably 3 μm or more, and still more preferably 5 μm or more, It is more preferably 10 μm or more, more preferably 50 μm or less, more preferably 30 μm or less, and still more preferably 20 μm or less.

<7> The skin cosmetic as described in any one of <1> to <6>, wherein the mass ratio (A/B) of the component (A) to the component (B) is preferably 0.01 or more and 2.0 or less, It is more preferably 0.01 or more and 1.0 or less, still more preferably 0.01 or more and 0.8 or less, still more preferably 0.05 or more and 0.8 or less, and still more preferably 0.10 or more and 0.4 or less.

<8> The skin cosmetic as described in any one of <1> to <7>, wherein the content of component (A) is preferably 0.01% by mass or more in the total amount of the cosmetic, more preferably 0.02% by mass Above, more preferably 0.05% by mass or more, still more preferably 1.0% by mass or more, still more preferably 1.5% by mass or more, still more preferably 2.0% by mass or more, and more preferably 20% by mass or less, more preferably It is 12% by mass or less, more preferably 10% by mass or less, and still more preferably 5% by mass or less.

<9> The skin cosmetic as described in any one of <1> to <8>, wherein the content of component (B) is preferably 3% by mass or more in the total amount of the cosmetic, more preferably 5% by mass Above, it is more preferably 6% by mass or more, still more preferably 10% by mass or more, more preferably 30% by mass or less, more preferably 18% by mass or less, and still more preferably 15% by mass or less.

<10> The skin cosmetic as described in any one of <1> to <7>, which further contains a fungicide as component (C), preferably containing isopropylmethylphenol, triclosan, and chlorine Benzalkonium chloride, benzonine chloride, halocaban, triclosan, chlorhexidine hydrochloride, chlorhexidine gluconate and beta glycyrrhetinic acid.基phenol.

<11> The skin cosmetic as described in <8>, which further contains carboxylic acid or its salt as component (D), 1,3-butanediol as component (E), and component (F) One or more of HLB10~13 non-ionic surfactants.

<12> The skin cosmetic as described in <10> or <11>, wherein the content of component (C) is preferably 0.01 to 0.2 mass%, more preferably 0.02 to 0.15 mass%, and still more preferably 0.05 to 0.1 quality%.

<13> The skin cosmetic as described in <11> or <12>, wherein the component (D) carboxylic acid or its salt is selected from monocarboxylic acid, dicarboxylic acid, hydroxycarboxylic acid, aromatic carboxylic acid, and acidic amino group One or more than two kinds of acids and their salts are selected.

<14> The skin cosmetics as described in any one of <11> to <13>, wherein the content of component (D) is preferably 0.1-3% by mass in the total amount of cosmetics, more preferably 0.2~ 2.8% by mass, more preferably 0.5 to 2.5% by mass.

<15> The skin cosmetics as described in any one of <11> to <14>, wherein the content of ingredient (E) is preferably 0.1-10% by mass in the total amount of cosmetics, more preferably 0.5~ 8% by mass, more preferably 1 to 5% by mass.

<16> The skin cosmetic as described in any one of <11> to <15>, wherein the component (F) is a polyoxyethylene alkyl ether or polyoxyethylene having an alkyl or alkenyl group with 10 to 18 carbon atoms Vinyl ether.

<17> The skin cosmetics as described in any one of <11> to <16>, wherein the content of component (F) is preferably 0.01-1% by mass in the total amount of cosmetics, more preferably 0.01~ 0.8% by mass, more preferably 0.01 to 0.5% by mass.

<18> The skin cosmetic as described in any one of <11> to <17>, which further contains a nonionic surfactant having an HLB value of 4-7 and a liquid at 25°C with a glyceryl group as Ingredient (G).

<19> The skin cosmetic as described in any one of <1> to <18>, which is in the form of a cream.

<20> The skin cosmetic as described in <19>, which further contains as component (H) a solid oily component with a melting point of 60°C or higher, component (I) polyether modified silicone, as component (J ) Powders other than component (A) and component (B), antioxidant as component (K), and poly(N-alkyleneimine) bonded silicone polymer as component (L) One or more of them.

<21> The skin cosmetic material as described in any one of <1> to <20>, which is in the form of a roller ball.

<22> The skin cosmetic as described in <21>, which further contains a lower alcohol with 2 to 4 carbon atoms as component (M), a water-soluble polymer as component (N), and Sorbitan monooleate, sorbitan trioleate, sorbitan monoisostearate, polyoxyethylene oleyl ether, and polyoxyethylene glyceryl triisostearate are selected from the group 1 One or two or more, one selected from trimethylsiloxysilicic acid as component (P) and poly(N-alkyleneimine) bonded silicone polymer as component (L) One or more than two.

<23> The skin cosmetic as described in any one of <1> to <22>, which is in the form of a mist, spray or lotion.

<24> The skin cosmetic as described in <23>, which further contains polyoxyethylene polyoxypropylene decyl myristyl ether as component (Q) and polyether modified silicone as component (I) One or more of them.

<25> A method for evaporating sweat, which includes the step of applying the skin cosmetics described in any one of <1> to <24> to the skin.

<26> A method for forming a coating film composed of component (A) and component (B) on the surface of the skin, which comprises: applying the skin cosmetics as described in any one of <1> to <24> Steps applied to the skin.

<27> A water evapotranspiration accelerator, comprising: containing the following components (A) and (B), and the mass ratio (A/B) of the component (A) to the component (B) is 0.01 or more and 2.5 or less The composition.

(A) Cross-linked resin powder with self-adhesive ability

(B) Spherical absorbent powder with a specific surface area of 150m ² /g or more and 1000m ^{2 /g or less}

<28> A use, which is the use of the skin cosmetics described in any one of <1> to <24> as a deodorant.

[Example]

Examples are given below to further describe the present invention in detail.

The method for producing three types of powders (a1, a2, a3), which are crosslinked resin powders having self-adhesive ability as the component (A), will be described. The characteristics of each powder are to ensure that it is non-sticky and non-dry to the skin, and continues to give a smooth touch. In addition, the average particle size is set as follows: a1 is 0.3μm, a2 is 2.2μm, and a3 is 10μm. The respective manufacturing methods are shown below.

Manufacturing example 1 (manufacturing of powder (a1))

In a beaker, 85 g of lauryl methacrylate, 15 g of ethylene glycol dimethacrylate, and 2 g of lauryl peroxide were mixed and stirred to dissolve. 400 g of ion-exchanged water in which 0.75 g of sodium N-stearyl-N-methyl taurate (SMT) was dissolved was added thereto, and dispersed with a homogenizer to an average particle diameter of 0.3 μm.

This dispersion liquid was poured into a four-necked flask, and nitrogen substitution was performed for 30 minutes while stirring. The temperature inside the flask was heated to 80°C with an oil bath, and after polymerization was performed for 5 hours after reaching 80°C, it was cooled to room temperature. The dispersion of polymerized particles is freeze-dried, and the particles are recovered, thereby obtaining a powder (a1).

Manufacturing example 2 (manufacturing of powder (a2))

In a beaker, 82 g of lauryl methacrylate, 3 g of methacrylic acid, 15 g of ethylene glycol dimethacrylate, and 2 g of lauryl peroxide were charged, mixed, stirred, and dissolved. 400 g of ion-exchanged water in which 0.75 g of sodium N-stearyl-N-methyl taurate (SMT) was dissolved was added thereto, and dispersed with a homogenizer to an average particle size of 2.2 μm.

This dispersion liquid was poured into a four-necked flask, and nitrogen substitution was performed for 30 minutes while stirring. The temperature inside the flask was heated to 80°C with an oil bath, and after polymerization was carried out for 5 hours after reaching 80°C, it was cooled to room temperature. The dispersion of polymerized particles is freeze-dried, and the particles are recovered, thereby obtaining a powder (a2).

Manufacturing example 3 (manufacturing of powder (a3))

In a beaker, 82 g of lauryl methacrylate, 3 g of methacrylic acid, 15 g of ethylene glycol dimethacrylate, and 2 g of lauryl peroxide were charged, mixed, stirred, and dissolved. 400 g of ion-exchanged water in which 0.75 g of sodium dodecyl sulfate (SDS) was dissolved was added thereto, and dispersed by a homogenizer to an average particle diameter of 10 μm.

This dispersion liquid was poured into a four-necked flask, and nitrogen substitution was performed for 30 minutes while stirring. The temperature inside the flask was heated to 80°C with an oil bath, and after polymerization was performed for 5 hours after reaching 80°C, it was cooled to room temperature. The dispersion of polymerized particles is freeze-dried, and the particles are recovered, thereby obtaining a powder (a3).

[Examples 1 to 37 and Comparative Examples 1 to 11]

The samples described in Tables 1 to 5 were produced, and water diffusibility, friction resistance, and water resistance were evaluated. The results are shown in Tables 1 to 5.

(Production method)

Measure component (A) and component (B), add ion-exchanged water, and stir and mix with a propeller.

(Water diffusibility test)

The sample was coated with a size of 4 cm×4 cm (coating amount 0.1 mL/cm ² ) on a glass plate and dried. Drop 0.5 mL of water into the center of the dried coating film, and measure the diameter of the concentric circles after spreading on the coating film for 1 minute. The larger the value, the better the water diffusibility.

(Abrasion resistance)

(1) Coat 0.1 mL/cm ^{2 of the} sample on a glass slide and let it dry. The weight of the dried coating film is measured (weight a).

(2) Apply a load of 20 g to the qualitative filter paper (product name: Whatman 1), and reciprocate 5 times on the dry coating film.

(3) Measure the weight of the dried coating film after rubbing (weight b).

(4) Calculate the friction resistance value (b/a*100) based on the values obtained in (1) and (3) above. The larger the value, the better the rub resistance.

(Water resistance)

(1) Coat 0.1 mL/cm ^{2 of the} sample on a glass slide and let it dry. Measure the weight of the dried coating film (weight a)

(2) Immerse the glass plate in a beaker filled with ion-exchange water by immersing the dry coating film in water, and let it stand for 6 hours.

(3) After taking out the slide glass and drying it, the weight of the dried coating film is measured (weight b).

(4) Calculate the water resistance value (b/a*100) based on the values obtained in (1) and (3) above. The larger the value, the better the water resistance.

Next, a manufacturing example of the cosmetic of the present invention is shown.

The obtained skin cosmetic has excellent sweat transpiration, and does not disappear from the skin due to sweat or friction, and has excellent long-term sweat transpiration.

[Example 38]

[Example 39]

The water diffusibility value of the lotion of Example 39 is 16 mm, the friction resistance value is 76%, and the water resistance value is 72%.

[Example 40]

The cosmetic material of Example 40 has a water diffusibility value of 17 mm, a friction resistance value of 75%, and a water resistance value of 74%.

[Example 41]

The cosmetic material of Example 41 has a water diffusibility value of 13 mm, a friction resistance value of 72%, and a water resistance value of 70%.

Claims (20)

A skin cosmetic containing the following components (A) and (B), and the mass ratio (A/B) of the component (A) to the component (B) is 0.06 or more and 2.5 or less; (A) self-crosslinking (Meth) acrylic resin powder, silicone elastomer spherical powder and urethane resin powder selected at least one, and the average particle size is 0.09μm or more and 4μm or less with self-adhesive ability Cross-linked resin powder; (B) One or more selected from porous silica powder and porous calcium carbonate, and a spherical water-absorbing powder with a ^{specific surface area of 150m 2} /g or more and 1000m ^{2 /g or less} Body: 5% by mass or more and 30% by mass or less in the total amount of skin cosmetics. The skin cosmetic of claim 1, wherein the average particle diameter of the component (A) is 0.1 μm or more and 4 μm or less. The skin cosmetic of claim 1, wherein the average particle size of the component (B) is 0.5 μm or more and 50 μm or less. The skin cosmetic of claim 1, wherein the component (A) is a cross-linked (meth)acrylate resin powder. The skin cosmetic of the requested item 1, wherein the component (B) based specific surface area of 150m ² / g or more and 1000m ² / g or less of a porous silicon oxide powder. The skin cosmetic of claim 1, wherein the average oil absorption of component (B) when measured by JIS K 5101-13-1 is 300mL/100g or more and 500mL/100g or less. The skin cosmetic of claim 1, which further contains a fungicide as ingredient (C). Such as the skin cosmetics of claim 7, wherein the fungicide of component (C) is from isopropyl methylphenol, triclosan, benzalkonium chloride, benzonine chloride, halocaban, triclosan One or more of diphenylurea, chlorhexidine hydrochloride and chlorhexidine gluconate. Such as the skin cosmetic of claim 7, which further contains carboxylic acid or its salt as ingredient (D), 1,3-butanediol as ingredient (E), and HLB10-13 as ingredient (F) Ionic surfactant. Such as the skin cosmetic of claim 7, which further contains a non-ionic surfactant with a glyceryl group in a liquid form at 25°C with an HLB of 4 to 7 as component (G). Such as the skin cosmetic of any one of claims 1 to 10, which is in the form of a cream. The skin cosmetic of claim 11, which further contains one or more of the following ingredients: as ingredient (H), a solid oily ingredient with a melting point of 60°C or higher; as ingredient (I), polyether Modified silicone; as component (J) as component (A) and powder other than component (B); as component (K) as antioxidant and as component (L) as poly(N-alkynyleneimine) ) Bonded silicone polymer. Such as the skin cosmetic of any one of claims 1 to 10, which is a roller ball type. Such as the skin cosmetic of claim 13, which further contains one or more of the following ingredients: a lower alcohol with a carbon number of 2 to 4 as the ingredient (M); a water-soluble polymer as the ingredient (N) ; As component (O) selected from sorbitan monooleate, sorbitan trioleate, sorbitan monoisostearate, polyoxyethylene oleyl ether and triisostearate polyoxyethylene One or more of the group consisting of glycerides; poly(N-alkyleneimine) bonded silicone polymer as component (L); and trimethylsilane as component (P) Oxysilicic acid. Such as the skin cosmetic of any one of claims 1 to 10, which is in the form of a mist, spray or lotion. The skin cosmetic of claim 15, which further contains one or more of the following ingredients: polyoxyethylene polyoxypropylene decyl tetradecyl ether as ingredient (Q); and as ingredient (I) The polyether modified silicone. Such as the skin cosmetic of any one of claims 1 to 10, which is used as a deodorant. A method for evaporating sweat, which includes the step of applying the skin cosmetic material of any one of claims 1 to 17 to the skin. A method for forming a coating film composed of ingredient (A) and ingredient (B) on the surface of the skin, which includes the step of applying the skin cosmetic material of any one of claims 1 to 17 to the skin. A water evapotranspiration accelerator, comprising: a composition containing the following components (A) and (B), and the mass ratio (A/B) of component (A) to component (B) is 0.06 or more and 2.5 or less ; (A) Self-crosslinking (meth)acrylate resin powder, silicone elastomer spherical powder and urethane resin powder at least one selected, and the average particle size is 0.09μm or more and 4μm The following cross-linked resin powders with self-adhesive ability; (B) One or more selected from porous silica powder and porous calcium carbonate, and the specific surface area is 150m ² /g or more and 1000m ² /g or less The spherical water-absorbent powder: 5% by mass or more and 30% by mass or less in the total composition.