CN109862877B

CN109862877B - Skin cosmetic

Info

Publication number: CN109862877B
Application number: CN201780063886.6A
Authority: CN
Inventors: 岩井秀隆; 上山千纮
Original assignee: Kao Corp
Current assignee: Kao Corp
Priority date: 2016-10-18
Filing date: 2017-10-17
Publication date: 2022-04-29
Anticipated expiration: 2037-10-17
Also published as: TW201818916A; JP6775479B2; TWI744393B; JP2018065800A; CN109862877A; MY188658A; WO2018074440A1

Abstract

The invention provides a skin cosmetic which can be used even when a large amount of sweat is generated. The skin cosmetic of the present invention contains the following component (a) and component (B), and the mass ratio (a/B) of component (a) to component (B) is 0.01 to 2.5. (A) Crosslinked resin powder with self-adhesive ability; (B) the specific surface area is 150m²Over 1000 m/g²A spherical water-absorbent powder having a particle diameter of not more than g.

Description

Skin cosmetic

Technical Field

The invention relates to a skin cosmetic, in particular to a skin cosmetic containing powder.

Background

As a cosmetic for suppressing stickiness and odor of sebum or sweat and imparting a refreshing feeling, a deodorizing cosmetic is used. Such deodorant cosmetics contain an antiperspirant component and a bactericide component. As the antiperspirant component, various aluminum compounds having an astringent action, zinc p-phenolsulfonate, and the like are used. As cosmetics containing such an antiperspirant ingredient, for example, there are reported: a powdery solid cosmetic containing a powder in addition to an antiperspirant component and a bactericidal component (patent document 1); a deodorant stick containing a silicone gel, a polyol fatty acid ester powder, a curing agent, and a deodorant component (patent document 2); an antiperspirant deodorant composition containing an aluminum compound, a phenolic bactericide, an aldehyde perfume, a chelating agent and water (patent document 3).

Patent document 1: japanese laid-open patent publication No. 2010-77094

Patent document 2: japanese laid-open patent publication No. 2015-3891

Patent document 3: japanese patent laid-open publication No. 2016 AND 113447

Disclosure of Invention

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

(A) Crosslinked resin powder with self-adhesive capacity

(B) The specific surface area is 150m²Over 1000 m/g²Water-absorbing spherical powder having a water absorption of not more than g

In addition, the present invention provides a method for transpiration of sweat, comprising the step of applying the above-mentioned skin cosmetic to the skin.

The present invention also provides a method for forming a coating film composed of a composite of component (a) and component (B) on the surface of skin, comprising the step of applying the above-mentioned skin cosmetic to the skin.

In addition, the present invention provides a water evaporation accelerator comprising: the composition contains the following components (A) and (B), and the mass ratio (A/B) of the component (A) to the component (B) is 0.01-2.5.

(A) Crosslinked resin powder with self-adhesive capacity

Detailed Description

There is a problem that sufficient effects cannot be obtained with the antiperspirant composition when a large amount of sweat is produced. For example, antiperspirant compositions with astringent action are not able to suppress perspiration produced during commuting or exercise. In addition, the water-absorbent powder absorbs a large amount of sweat that cannot be handled during commuting.

Accordingly, the present invention provides a skin cosmetic that can cope with a large amount of sweat.

Accordingly, the present inventors have conducted various studies on skin cosmetics using water-absorbent powders, and as a result, they have found that when the specific surface area is set to 150m²Over 1000 m/g²When a powder having water absorption of not more than g is used in combination with a crosslinked resin powder having self-adhesive ability, the sweat absorbed by the water-absorbent powder evaporates quickly and a large amount of sweat evaporates quickly, and even if a large amount of sweat is generated, the water-absorbent powder remains on the skin and does not disappear from the skin even by friction, and the present invention has been completed.

When the skin cosmetic of the present invention is applied to the skin, a coating film comprising a composite of component (A) and component (B) having a specific surface area of 150m as component (B) is formed on the skin²Over 1000 m/g²The water-absorbent powder of the present invention is characterized in that the water-absorbent powder of the present invention is capable of rapidly evaporating sweat absorbed by a water-absorbent powder of the amount of/g or less to rapidly evaporate a large amount of sweat, and that the water-absorbent powder as the component (B) remains on the skin even if a large amount of sweat is generated, and does not disappear from the skin even if rubbed. Therefore, the skin cosmetic of the present invention can produce a large amount of sweat even when the sweat is generatedIn the case of (2), sweat is absorbed rapidly and dried, and does not disappear from the skin due to sweat or friction, and the transpiration function of sweat is exhibited for a long time.

The component (a) used in the skin cosmetic of the present invention is a crosslinked resin powder having self-adhesive ability. When the component (a) is applied to the skin simultaneously with the component (B) by utilizing the self-adhesive ability of the component (a), a composite coating film of the component (a) and the component (B) is formed on the skin surface. The composite coating film thus formed absorbs sweat due to the excellent water absorption property of the component (B), exhibits quick drying properties of sweat, and also exhibits excellent abrasion resistance.

The crosslinked resin powder having self-adhesive ability as the component (a) is preferably 1 or 2 or more selected from the group consisting of crosslinked (meth) acrylate resin powder, silicone elastomer spherical powder, and urethane resin powder, and more preferably crosslinked (meth) acrylate resin powder, from the viewpoint of water diffusibility, abrasion resistance, and water resistance of the coating film. In the present specification, "(meth) acrylic acid" is a concept including 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. Examples of such a crosslinked (meth) acrylate resin powder include those described in jp 2006-225311 a. Examples of the monomer other than the (meth) acrylate ester monomer include polymerizable vinyl group-containing monomers such as (meth) acrylic acid, styrene, and divinylbenzene.

The (meth) acrylate monomer is preferably an alkyl (meth) acrylate having an alkyl group with 1 to 18 carbon atoms from the viewpoint of self-adhesiveness. Specific examples thereof include methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, lauryl (meth) acrylate, and stearyl (meth) acrylate. Among these, alkyl (meth) acrylates having an alkyl group of 4 to 18 carbon atoms such as butyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate and the like are particularly preferable from the viewpoint of self-adhesiveness. These can also be used in combination of a plurality of kinds. The proportion of the (meth) acrylate monomer in the total monomer component (including the crosslinkable monomer described below, the same applies hereinafter) is preferably 30 to 98% by mass, and more preferably 50 to 85% by mass, from the viewpoint of uniformity of the composite coating film.

Examples of the monomer having a carboxyl group include (meth) acrylic acid, maleic acid, fumaric acid, crotonic acid, and itaconic acid. These can also be used in combination of a plurality of kinds. The proportion 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, from the viewpoint of water diffusibility of the coating film.

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

The monomer component preferably contains a crosslinkable monomer having 2 or more vinyl groups as a crosslinking agent. Examples of such a crosslinkable monomer include ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, decaethylene glycol di (meth) acrylate, pentadecyethylene 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, diethylene glycol di (meth) acrylate phthalate, caprolactone-modified dipentaerythritol hexa (meth) acrylate, caprolactone-modified hydroxypivalate neopentyl glycol di (meth) acrylate, caprolactone-modified hydroxypivalate, neopentyl glycol di (meth) acrylate, and mixtures thereof, A (meth) acrylate-based crosslinkable monomer such as polyester (meth) acrylate or urethane (meth) acrylate, and an aromatic divinyl monomer such as divinylbenzene, divinylnaphthalene, or a derivative thereof. These can also be used in 1 or 2 or more combinations. Among these crosslinkable monomers, (poly) alkylene glycol di (meth) acrylates such as ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, 1, 3-butanediol di (meth) acrylate, 1, 4-butanediol di (meth) acrylate, 1, 6-hexanediol di (meth) acrylate, caprolactone-modified dipentaerythritol hexa (meth) acrylate, caprolactone-modified hydroxypivalate neopentyl glycol di (meth) acrylate, and polyester (meth) acrylate are more preferable from the viewpoint of a dry touch of a coating film. The crosslinkable monomer is preferably used in an amount of 3 to 50% by mass based on the total monomer components.

As the monomer component, other monomers copolymerizable with the above-mentioned (meth) acrylate monomer, carboxyl group-containing monomer and crosslinkable monomer may be copolymerized. Examples of the other monomer include styrene, (meth) acrylonitrile, (meth) acrylamide, vinyl acetate, and vinylpyrrolidone.

The crosslinked resin powder can be obtained by polymerizing a monomer component including the above (meth) acrylate monomer, the monomer having a carboxyl group, and the crosslinkable monomer by aqueous suspension polymerization, emulsion polymerization, seed polymerization, dispersion polymerization, or the like using a dispersant, a polymerization initiator, or the like, for example. Among them, the aqueous suspension polymerization method is preferable from the viewpoint of easily obtaining spherical resin powder having a uniform particle diameter.

As the silicone elastomer spherical powder, a crosslinked type methylpolysiloxane can be cited. The crosslinked methylpolysiloxane is obtained by adding a small amount of methyltrimethoxysiloxane to dimethoxydimethylsiloxane and polymerizing the resulting mixture, and has a crosslinked structure derived from methyltrimethoxysiloxane inside the copolymer. Specifically, the polymer can be produced by emulsion polymerization, and examples thereof include Trefil series (Trefil E506W, Trefil E505C, Trefil E506C, Trefil E505W, and the like) manufactured by toray corning silicone corporation. These may be used alone or in combination, or may be dispersed in various solvents or the like without any problem or may be mixed with other components in advance. Examples of these include Trefil E507 solution, BY29-129, BY29-122, and the like. Further, X-52-1139K, X-52-1139G, manufactured by shin-Etsu chemical industries, Inc., which is a silicone resin/rubber composite powder, is also included.

Examples of the urethane resin powder include a self-emulsifying urethane dispersion and a core-shell urethane acrylic dispersion having an acrylic resin as a core and urethane as a shell structure. The polyurethane dispersion is produced from a diisocyanate polymer and a diol monomer, and specifically, WBR-2101 produced by TAISEI FINE CHEMICAL is exemplified. Examples of the core-shell urethane acrylate dispersion include WEM-200 (manufactured by TAISEI FINE CHEMICAL Co., Ltd.) and DAITOSOL U9-40 (manufactured by DaDonghuacheng chemical Co., Ltd.).

The average particle diameter of the component (a) is preferably 0.09 μm or more, more preferably 0.2 μm or more, further preferably 0.3 μm or more, and further preferably 20 μm or less, more preferably 10 μm or less, further preferably 5 μm or less, and further preferably 2.2 μm or less, from the viewpoint of good rubbing resistance, water resistance, and excellent water absorption (water diffusibility) of the coating film formed on the skin. The 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 diameter is an average particle diameter of the powder in the case of monodispersion, and is a volume average particle diameter of particle diameters measured by a static light scattering method.

The shape of the component (a) may be spherical, substantially spherical, granular, etc., and is preferably spherical or substantially spherical in view of the feeling of use and the perspiration resistance of the coating film.

The component (A) is preferably a crosslinked resin powder having a glass transition temperature (Tg) of 20 ℃ or lower, from the viewpoint of having self-adhesive ability. The Tg is more preferably 0 ℃ or lower, and still more preferably-5 ℃ or lower. Here, the glass transition temperature is a temperature measured by Differential Scanning Calorimetry (DSC). The glass transition temperature (Tg) of the homopolymer of the alkyl (meth) acrylate as the monomer component is preferably 20 ℃ or lower, more preferably 0 ℃ or lower, and still more preferably-5 ℃ or lower. Examples of such alkyl (meth) acrylates include butyl acrylate (Tg: -54 ℃ C.), sec-butyl acrylate (Tg: -22 ℃ C.), 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.), and dodecyl methacrylate (Tg: -65 ℃ C.).

The component (B) used in the skin cosmetic of the present invention has a specific surface area of 150m²Over 1000 m/g²A spherical water-absorbent powder having a particle diameter of not more than g. In the present invention, the component (B) has a specific surface area of 150m due to water absorption²Over 1000 m/g²Because of absorption of a large amount of sweat and rapid diffusion of water into the composite coating film of the component (a) and the component (B) formed on the skin, evaporation is promoted. Water absorption and specific surface area of 150m²Over 1000 m/g²The following/g can be confirmed by the oil absorption obtained by using JIS K5101-13-1 < general test method for measuring oil absorptions of the pigment and the extender pigment >. Preferably has an average oil absorption of 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. The upper limit of the oil absorption is about 500mL/100 g.

The specific surface area is a BET specific surface area measured by a gas adsorption method (a method for measuring a specific surface area of a powder (solid) adsorbed with a gas according to JIS Z8830: 2001).

The specific surface area of the component (B) is preferably 200m from the viewpoint of water diffusibility and evapotranspiration²A value of at least one of,/g, more preferably 250m²A total of 900m or more²A ratio of 800m or less, more preferably 800m²A ratio of 700m or less per gram²The ratio of the carbon atoms to the carbon atoms is less than g.

In addition, the component (B) is preferably spherical in shape from the viewpoint of the feeling of use and the perspiration resistance of the coating film.

Water-absorbing property as the component (B) and having a specific surface area of 150m²Over 1000 m/g²The powder having a particle size of not more than g includes porous silica powder, porous calcium carbonate, porous nylon powder, etc., and among these, porous silica is more preferable from the viewpoint of water diffusibility and evaporability. Here, the porous silica includes hollow porous silica. Commercially available porous silica products include Sunsphere series (AGC Si-Tech) and Goddball series (Suzuki grease industries).

The average particle diameter of the component (B) is preferably 0.5 μm or more, more preferably 3 μm or more, further preferably 5 μm or more, and further preferably 10 μm or more from the viewpoint of excellent water absorption (water diffusion) of the coating film formed on the skin, and is preferably 50 μm or less, more preferably 30 μm or less, and further preferably 20 μm or less from the viewpoint of rubbing resistance and water resistance of the coating film. The average particle size is preferably in the range of 0.5 to 50 μm, more preferably 3 to 30 μm, still more preferably 5 to 30 μm, and still more preferably 10 to 20 μm.

In the skin cosmetic of the present invention, the mass ratio (a/B) of the component (a) to the component (B) is 0.01 to 2.5 from the viewpoint of ensuring water absorption (water diffusion property), abrasion resistance and water resistance of the coating film formed on the skin. A/B is preferably 0.01 to 2.0, more preferably 0.01 to 1.0, further preferably 0.01 to 0.8, further preferably 0.05 to 0.8, and particularly preferably 0.10 to 0.4. The water absorption of the coating film can be evaluated in the form of water diffusibility of the coating film shown in the following examples.

The component (a) and the component (B) may be contained in the skin cosmetic of the present invention in the above-mentioned mass ratio, and the content of the component (a) is preferably 0.01 mass% or more, more preferably 0.02 mass% or more, further preferably 0.05 mass% or more, further preferably 1.0 mass% or more, further preferably 1.5 mass% or more, and further preferably 2.0 mass% or more in the total amount of the cosmetic, from the viewpoint of ensuring the water absorption (water diffusion property), rubbing resistance, and water resistance of the coating film formed on the skin. Further, it is preferably 20% by mass or less, more preferably 12% by mass or less, further preferably 10% by mass or less, and further preferably 5% by mass or less. The content of the specific component (a) is preferably 0.01 to 20 mass%, more preferably 0.02 to 12 mass%, even more preferably 0.05 to 10 mass%, even more preferably 1.0 to 10 mass%, even more preferably 1.5 to 10 mass%, even more preferably 2.0 to 10 mass%. From the same viewpoint, the content of the component (B) is preferably 3% by mass or more, more preferably 5% by mass or more, further preferably 6% by mass or more, and further preferably 10% by mass or more, in the total amount of the cosmetic. Further, it is preferably 30% by mass or less, more preferably 18% by mass or less, and further 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 9 mass% or more and 15 mass% or less.

When the skin cosmetic of the present invention is applied to the skin, a coating film comprising a composite of the component (a) and the component (B) is formed on the skin surface, and the skin cosmetic is particularly useful as a transpiration cosmetic and a deodorant cosmetic for perspiration because the skin cosmetic has excellent water absorption (water diffusion) properties and exhibits excellent rub resistance and water resistance.

The composition containing the component (a) and the component (B) and having a mass ratio (a/B) of the component (a) to the component (B) of 0.01 to 2.5 is useful as a transpiration accelerator for water including sweat since it exhibits excellent water absorption (water diffusibility) and excellent rub resistance and water resistance.

The skin cosmetic of the present invention may contain, in addition to the above components, a bactericide, an antiperspirant, a powder, an oil or fat, a wax, a silicone, a hydrocarbon oil, a higher fatty acid, a higher alcohol, a synthetic ester oil, another surfactant, a polymer compound, an antioxidant, a pigment, an emulsion stabilizer, a pH adjuster, an astringent, a preservative, an ultraviolet absorber, a chelating agent, a moisturizer, a thickener, a freshener, an anti-inflammatory agent, an amino acid, a vitamin agent, various plant extracts, and the like as the component (C).

Examples of the bactericide as the component (C) include isopropylmethylphenol, triclosan, benzalkonium chloride, benzethonium chloride, halocarban, triclocarban, chlorhexidine hydrochloride, chlorhexidine gluconate, and β glycyrrhetinic acid. Among them, isopropyl methylphenol is preferable.

The skin cosmetic of the present invention containing a bactericide is useful as a deodorant cosmetic.

Here, the bactericide as the component (C) preferably contains isopropyl methylphenol, and the content of the component (C) in the total amount of the cosmetic is preferably 0.01 to 0.2% by mass, more preferably 0.02 to 0.15% by mass, and further preferably 0.05 to 0.1% by mass, from the viewpoints of bactericidal effect and residue on the skin.

In addition, from the viewpoint of the deodorizing effect by the excellent sterilizing effect, the residual property of the sterilizing component on the skin (the durability of the sterilizing and deodorizing effects), the feeling of use (anti-stickiness), and the like, it is preferable that the skin cosmetic of the present invention further contains 1 or 2 or more kinds selected from the group consisting of the carboxylic acid or a salt thereof as the component (D), 1, 3-butanediol as the component (E), and the nonionic surfactant of HLB10 to 13 as the component (F), in addition to the sterilizing agent as the component (C).

The carboxylic acid or a salt thereof as the component (D) is preferably an organic carboxylic acid or a salt thereof having 1 to 8 carbon atoms, and more preferably an organic carboxylic acid or a salt thereof having 3 to 8 carbon atoms.

Specific examples of the carboxylic acid as the component (D) include monocarboxylic acids such as acetic acid, propionic acid and octanoic acid; dicarboxylic acids such as malonic acid, succinic acid, glutaric acid, adipic acid, maleic acid, fumaric acid, etc.; 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; acidic amino acids such as glutamic acid and aspartic acid.

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 cations derived from basic amino acids such as arginine and lysine. The salt is preferably an alkali metal salt, more preferably a sodium salt.

From the viewpoint of the bactericidal effect (deodorant effect) and leaving the component (C) on the skin, the component (D) is preferably 1 or 2 or more selected from dicarboxylic acids, hydroxycarboxylic acids and salts thereof, and more preferably 1 or 2 or more selected from succinic acid, adipic acid, citric acid and salts thereof.

The content of the component (D) is preferably 0.1 to 3% by mass, more preferably 0.2 to 2.8% by mass, and even more preferably 0.5 to 2.5% by mass based on the total amount of the cosmetic, from the viewpoints of bactericidal effect (deodorant effect), leaving the component (C) on the skin, and long-term stability of the component (C).

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

The content of the component (E) is preferably 0.1 to 10% by mass, more preferably 0.5 to 8% by mass, and even more preferably 1 to 5% by mass based on the total amount of the cosmetic, from the viewpoint of obtaining a sufficient bactericidal effect, the residual property of the component (C) on the skin, the long-term storage stability, the feeling of use, and the cooling feeling.

By blending a nonionic surfactant having HLB 10-13 of component (F), the residue of component (C) on the skin is improved, and the long-term storage stability of component (C) is improved. The component (F) is more preferably a component having HLB of 11 to 13, and still more preferably a component having HLB of 12 to 13, from the viewpoint of improving the residue of the component (C) and improving long-term storage stability.

In the present invention, the HLB value is an index indicating a hydrophilic-lipophilic Balance value (Hydrophi1e Lipophi1e Balance), and in the present invention, a value calculated by the following formula by the people in the field and temple village, etc. is used. The HLB value is a value of each nonionic surfactant before blending.

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

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

From the same viewpoint, polyoxyethylene alkyl ethers having an alkyl group are preferable.

Specific examples thereof include polyoxyethylene lauryl ether (C12, HLB 10-13), polyoxyethylene tetradecyl ether (C14, HLB 10-13), polyoxyethylene cetyl ether (C16, HLB 10-13), and polyoxyethylene oleyl ether (C18, HLB 10-13), and polyoxyethylene lauryl ether is preferable.

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

The content of the component (F) is preferably 0.01 to 1% by mass, more preferably 0.01 to 0.8% by mass, and even more preferably 0.01 to 0.5% by mass based on the total amount of the cosmetic, from the viewpoint of the residual property of the component (C) on the skin and the long-term storage stability.

The skin cosmetic of the present invention preferably contains the component (G) a nonionic surfactant having a glycerin group which has an HLB value of 4 to 7 and is liquid at 25 ℃.

The term "liquid at 25 ℃ means that the viscosity at 25 ℃ is 10 ten thousand mPas or less.

The nonionic surfactant as the component (G) is preferably a nonionic surfactant having a branched alkyl or alkenyl group having 8 to 22 carbon atoms, bonded to a glyceryl group via an ether bond or an ester bond, or bonded via an epoxyalkyl bond.

The nonionic surfactant as the component (G) is preferably 1 or 2 or more selected from alkyl glyceryl ethers, glycerin fatty acid esters, polyglycerin fatty acid esters, polyoxyethylene glycerin ether fatty acid esters, polyoxyethylene hydrogenated castor oil fatty acid esters, and the like. Among them, from the viewpoint of improving the residual property of the component (a) on the skin and the cooling feeling, 1 or 2 or more selected from the group consisting of alkyl glyceryl ethers and glycerin fatty acid esters are preferable, and 1 or 2 or more selected from the group consisting of alkyl glyceryl ethers is more preferable.

Examples of such component (G) include isostearyl glyceryl ether (HLB5.4), 2-ethylhexyl glyceryl ether (HLB7), glyceryl monoisostearate (HLB6), polyglyceryl monoisostearate (degree of polymerization 2) (HLB5.5), polyoxyethylene monoisostearate (5) hydrogenated castor oil (HLB4), polyoxyethylene monoisostearate (10) hydrogenated castor oil (HLB5), polyoxyethylene monoisostearate (15) hydrogenated castor oil (HLB7), polyoxyethylene triisostearate (10) hydrogenated castor oil (HLB4), polyoxyethylene triisostearate (15) hydrogenated castor oil (HLB5), polyoxyethylene triisostearate (20) hydrogenated castor oil (HLB6), polyoxyethylene triisostearate (30) hydrogenated castor oil (HLB7), and the like.

Among these, isostearyl glyceryl ether, 2-ethylhexyl glyceryl ether and glyceryl monoisostearate are preferable from the viewpoint of improving the residue of the component (C) on the skin and the cooling feeling, and isostearyl glyceryl ether is preferable from the viewpoint of the use feeling.

The content of the component (G) is preferably 0.01 to 1% by mass, more preferably 0.01 to 0.8% by mass, and even more preferably 0.01 to 0.5% by mass based on the total amount of the cosmetic, from the viewpoint of obtaining a sufficient bactericidal effect and improving the residual property on the skin and the cooling feeling of the component (C).

The form of the skin cosmetic of the present invention is not particularly limited, and may be in the form of cream, ball, mist, lotion, aerosol, spray, stick, etc., and is more preferably in the form of cream, ball, mist, spray, lotion, etc., from the viewpoint of improving the antiperspirant action and the antibacterial action.

When the skin cosmetic of the present invention is in the form of a cream, it may contain, in addition to the above components, 1 or 2 or more selected from a solid oily component having a melting point of 60 ℃ or higher as the component (H), a polyether-modified silicone as the component (I), a powder other than the components (a) and (B) as the component (J), an antioxidant as the component (K), and a poly (N-acylalkyleneimine) bonded silicone-based polymer as the component (L).

The solid oily component having a melting point of 60 ℃ or higher of the component (H) is a component having a melting point of 60 ℃ or higher and being solid at room temperature (25 ℃), and preferably a component having a melting point of 60 to 110 ℃.

By using such an oily component having a high melting point, the bactericidal action can be improved and a smooth feeling in use can be obtained.

In the present invention, the melting point is a value measured by the standard I for pharmaceutical raw material (general test method, 70. melting point measurement method 1).

Examples of such oily components include oily components used in general skin preparations for external use, such as solid oils of hydrocarbons, waxes, esters, silicones and the like, and oils selected from animal waxes, plant waxes, mineral waxes, synthetic waxes, mixtures thereof and the like. For example, paraffin wax, ozokerite, synthetic hydrocarbon wax, fischer-tropsch wax, microcrystalline wax, polyethylene wax, ethylene-propylene copolymer, candelilla wax, beeswax, carnauba wax, or the like can be used.

Among these, hydrocarbons are preferable, and in particular, ozokerite (melting point 72 to 76 ℃), microcrystalline wax (melting point 60 to 85 ℃), polyethylene wax (melting point 75 to 105 ℃), and paraffin wax (melting point 70 to 78 ℃) are preferable from the viewpoint of the feeling of use.

The content of the component (H) is preferably 0.5 to 10% by mass, more preferably 0.5 to 8% by mass, and still more preferably 1 to 6% by mass based on the total amount of the cosmetic in terms of bactericidal effect and feeling upon use.

By using the polyether-modified silicone of component (I), excellent bactericidal action and good use feeling (no sticky feeling) can be obtained. The polyether-modified silicone as the component (I) may be any dimethylpolysiloxane having a polyoxyethylene group or a polyoxypropylene group, and examples thereof include components represented by the following formula (1) or formula (2), and 1 of these may be used alone or 2 or more may be used in combination.

[ in the formula (1), R¹Is- (CH)₂)₃-O-(C₂H₄O)_p-(C₃H₆O)_qA (wherein A represents a hydrogen atom or an alkyl group having 1 to 12 carbon atoms, p and q are each independently an integer of 0 to 50, and p + q.gtoreq.1), R²Each independently is methyl or- (CH)₂)₃-O-(C₂H₄O)_s-(C₃H₆O)_tB (wherein B represents a hydrogen atom or an alkyl group having 1 to 12 carbon atoms, s and t are each independently an integer of 0 to 50, and s + t.gtoreq.1), m represents an integer of 1 to 2000, and n represents an integer of 0 to 1000. Wherein, when n is 0, R²At least 1 of (a) is- (CH)₂)₃-O-(C₂H₄O)_s-(C₃H₆O)_t-B (wherein B, s and t have the same meaning as above).]

[ in the formula (2), r represents an integer of 1 to 20, and x, y and z are independent integers of 1 to 500. ]

Commercially available products of the component (I) include KF6011, KF6012, KF6013, KF6015, KF6016, KF6017, and KF6028 (all manufactured by shin-Etsu chemical industries, Ltd.).

The content of the component (I) is preferably 0.01 to 10% by mass, more preferably 0.05 to 5% by mass, and still more preferably 0.1 to 3% by mass based on the total amount of the cosmetic in terms of bactericidal action and feeling upon use.

By using powder other than the component (a) and the component (B) as the component (J), the bactericidal action can be improved and a favorable feeling in use can be obtained. The powder other than the component (A) and the component (B) of the component (J) may be any of the organic powder of the component (J-1) and the inorganic powder of the component (J-2), and 1 kind thereof may be used alone or 2 or more kinds thereof may be used in combination. The shape may be any of spherical, needle-like, and plate-like. Further, the component may be one treated with alumina, silica, zinc or the like, or one subjected to hydrophobic treatment with silicone or the like.

Examples of the organic powder of the component (J-1) include lauroyl lysine, methyl siloxane network polymer, polyamide powder, polyester powder, polyethylene powder, polypropylene powder, polystyrene powder, polyurethane, benzoguanamine powder, polymethylbenzoguanamine powder, tetrafluoroethylene powder, and the like.

Examples of the inorganic powder of the component (J-2) include titanium oxide, zirconium oxide, zinc oxide, cerium oxide, magnesium oxide, barium sulfate, calcium sulfate, magnesium sulfate, calcium carbonate, magnesium carbonate, talc, mica, kaolin, sericite, muscovite, synthetic mica, phlogopite, lepidolite, aluminum silicate, magnesium silicate, aluminum magnesium silicate, calcium silicate, barium silicate, strontium silicate, and metal tungstate.

The component (J) more preferably contains 1 or more species selected from methylsiloxane network polymers. The methyl siloxane network polymer is a polymer that is already commercially available as a cosmetic raw material, and can be used without limitation. Among these, the spherical polymer having an average particle diameter in the range of 1.0 to 30.0 μm is preferable, and the average particle diameter is more preferably 4.0 to 15 μm. In the present invention, the average particle diameter is an average particle diameter of the powder in the case of monodispersion, and is a volume average particle diameter of the particle diameter measured by a static light scattering method.

The methylsiloxane network polymer is a solid obtained by emulsion polymerization of methyltrimethoxysiloxane in an aqueous alkaline solution, and specifically includes Tospearl series (Tospearl 145A, etc.) manufactured by GE toshiba silicone corporation. Among these, the Tospearl series as the methylsiloxane network polymer is particularly preferable from the viewpoint of smoothness.

The content of the powder of component (J) is preferably 1 to 20% by mass, more preferably 2 to 10% by mass, and even more preferably 2 to 5% by mass, based on the total amount of the skin cosmetic, from the viewpoint of bactericidal action and feeling upon use.

Examples of the antioxidant as the component (K) include dibutylhydroxytoluene (BHT); vitamin E such as butylhydroxyanisole, delta tocopherol, etc., and derivatives thereof; thiotaurine, oenothera biennis extract, beta carotene, catechin compounds, flavonoid compounds, polyphenol compounds and the like. The catechin compound can be used as green tea extract, etc. Among them, from the viewpoint of improving the feeling in use, dibutylhydroxytoluene (BHT) or δ tocopherol is preferable. These antioxidants may be used alone or in combination of two or more.

The content of the component (K) is preferably 0.001 mass% or more, particularly preferably 0.005 mass% or more, in the total amount of the skin cosmetic from the viewpoint of preventing oxidation, and is preferably 1 mass% or less, particularly preferably 0.5 mass% or less from the viewpoint of reducing a sticky feeling after application.

The silicone-based polymer to which the poly (N-acylalkyleneimine) of the component (L) is bonded includes a silicone-based polymer in which a poly (N-acylalkyleneimine) containing a repeating unit represented by the following formula (3) is bonded to at least 1 of silicon atoms of a terminal or branched chain of a polyorganosiloxane segment via an alkylene group containing a hetero atom.

(in the formula, R³Represents a hydrogen atom, an alkyl group having 1 to 22 carbon atoms, a cycloalkyl group, an aralkyl group or an aryl group, 1 represents a number of 2 or 3)

Preferred examples of such silicone polymers include poly (N-formylethyleneimine) modified silicone, poly (N-acetylethyleneimine) modified silicone, poly (N-propionylethyleneimine) modified silicone, poly (N-N-octanoylethyleneimine) modified silicone, poly (N-N-dodecanoylethyleneimine) modified silicone, poly (N-formylpropyleneimine) modified silicone, poly (N-acetylethyleneimine) modified silicone, poly (N-acetylpropyleneimine) modified silicone, poly (N-propionylpropyleneimine) modified silicone, poly (N-N-octanoylpropyleneimine) modified silicone, poly (N-N-dodecanoylpropyleneimine) modified silicone, and the like.

The content of the component (L) is preferably 0.1 to 10% by mass, more preferably 0.2 to 8% by mass, and still more preferably 0.5 to 6% by mass based on the total amount of the skin cosmetic in terms of a dry feeling in use.

The skin cosmetic of the present invention can be formed into a ball type cosmetic. Here, the ball type is a cosmetic in which a cosmetic composition is filled in a ball container, and the cosmetic is applied by abutting a roller against an application site. The ball type cosmetic may contain 1 or 2 or more selected from the following components: a lower alcohol having 2 to 4 carbon atoms as component (M); a water-soluble polymer as the component (N); 1 or 2 or more selected from sorbitan monooleate, sorbitan trioleate, sorbitan monoisostearate, polyoxyethylene oleyl ether and polyoxyethylene glyceryl triisostearate as the component (O); trimethylsiloxy silicic acid as the component (P); and a poly (N-acylalkyleneimine) bonded silicone polymer as the component (L).

The lower alcohol having 2 to 4 carbon atoms as the component (M) is preferably ethanol. The content of the lower alcohol having 2 to 4 carbon atoms in the component (M) is preferably 20 to 80% by mass, more preferably 40 to 60% by mass, from the viewpoint of the feeling of use and the feeling of coolness.

The water-soluble polymer containing the component (N) can improve the residue of the bactericidal agent of the component (C) on the skin. The water-soluble polymer may be any of natural polymers, semisynthetic polymers, and synthetic polymers.

Examples of the natural polymers include xanthan gum, carrageenan, and alginic acid. Examples of the semi-synthetic polysaccharide polymer include modified polysaccharides such as hydroxyethyl cellulose, hydroxypropyl cellulose, sodium carboxymethyl cellulose, methyl cellulose, hydroxymethyl cellulose, and cationized cellulose. Examples of the synthetic polymer include acrylic polymers such as carbomer (crosslinked polyacrylic acid), polyacrylic acid, sodium polyacrylate, and acrylic acid/alkyl methacrylate copolymer; polyvinyl pyrrolidone, polyvinyl alcohol, cationized polyvinyl pyrrolidone, and the like. Among these, carbomer, acrylic acid/alkyl methacrylate copolymer, hydroxypropyl cellulose, sodium carboxymethyl cellulose are preferred.

Commercially available carbomers include Carbopol 910, Carbopol 934, Carbopol 940, Carbopol 941, Carbopol 980 and Carbopol 981 (manufactured by Lubrizol Advanced Materials, inc.), commercially available acrylic acid/alkyl methacrylate copolymers include Carbopol 1382, Carbopol ETD2020, PEMULEN TR-1 and PEMULEN TR-2 (manufactured by Lubrizol Advanced Materials, inc.), commercially available hydroxypropyl cellulose include HPC-M, HPC-H (manufactured by japan soda), commercially available sodium carboxymethyl cellulose include CMC dal (manufactured by Daicel Chemical Industries, inc.).

The water-soluble polymer of component (N) may be used in 1 or 2 or more types, and the content thereof is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, preferably 5% by mass or less, and more preferably 3% by mass or less in the total amount of the cosmetic from the viewpoint of the residue on the skin and the feeling of use of component (C). The content of the component (N) is preferably 0.01 to 5% by mass, more preferably 0.05 to 3% by mass, based on the total amount of the cosmetic.

By containing 1 or 2 or more selected from sorbitan monooleate, sorbitan trioleate, sorbitan monoisostearate, polyoxyethylene oleyl ether and polyoxyethylene glyceryl triisostearate of the component (O), the residue of the component (C) on the skin and the feeling of use are improved.

The content of the component (O) is preferably 0.01 to 3% by mass, more preferably 0.03 to 1% by mass, and still more preferably 0.05 to 0.5% by mass based on the total amount of the cosmetic, from the viewpoint of the residual property on the skin and the feeling of use of the component (C).

The trimethylsiloxysilicates as the component (P) are not limited as long as they are generally used in cosmetics, and any of them can be used, and among compounds having a crosslinked structure having a siloxane structure as a main skeleton, those having [ (CH) are preferred₃)₃SiO_1/2]_x[SiO₂]_YThe component (X is 1 to 3, Y is 0.5 to 8).

The weight average molecular weight of the trimethylsiloxysilicates of component (P) is preferably 1000 to 10000, more preferably 2000 to 9000, and even more preferably 3000 to 6000, from the viewpoint of the residue on the skin and the feeling of use of component (C). The form may be any of liquid, gel, paste, solid, etc. at 25 ℃, and is preferably solid. From the viewpoint of compatibility, a solution or dispersion obtained by dilution with a solvent, or a solution or dispersion obtained by mixing in advance is preferable. The solvent of trimethylsiloxy silicic acid as the diluting or dispersing component (P) is preferably 1 or 2 or more selected from dimethylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and isododecane, and more preferably volatile dimethylpolysiloxane or decamethylcyclopentasiloxane. The term "volatile" means having a flash point of 35 to 90 ℃.

As a commercially available product of the component (P), KF-7312T, KF-7312J, KF-7312K (manufactured by shin-Etsu chemical industries, Ltd.) or the like dissolved in a solvent in advance can be suitably used.

The content of the component (P) is preferably 0.005 to 2% by mass, more preferably 0.008 to 1% by mass, and further preferably 0.01 to 0.5% by mass based on the total amount of the cosmetic, from the viewpoint of the residue of the component (C) on the skin and the feeling of use.

In the case of the ball type, the content of the poly (N-acylalkyleneimine) bonded silicone polymer as the component (L) is preferably 0.3 to 5% by mass, more preferably 0.4 to 4% by mass, and further preferably 0.5 to 3% by mass in the total amount of the cosmetic, from the viewpoint of the residual property on the skin and the feeling of use of the antiseptic as the component (C).

When the skin cosmetic of the present invention is in the form of a mist, spray or lotion, it may contain 1 or 2 or more selected from polyoxyethylene polyoxypropylene decyltetradecyl ether (for example, PPG-6 decyltetradecyl polyether-30) as the component (Q) and polyether-modified silicone as the component (I) in addition to the above components.

The content of the component (Q) is preferably 0.05 to 2% by mass, more preferably 0.08 to 1% by mass, and still more preferably 0.1 to 0.5% by mass based on the total amount of the cosmetic, from the viewpoint of cooling feeling and long-term storage stability.

In the case of an aerosol, spray or lotion, the content of the component (I) is preferably 0.05 to 2% by mass, more preferably 0.08 to 1.5% by mass, and still more preferably 0.1 to 1% by mass, based on the total amount of the cosmetic, from the viewpoints of extensibility, affinity to the skin, and stability over time.

Since the cosmetic of the present invention is used in various forms as described above, it can be produced by adding and mixing the component (a), the component (B), and other components, heating the mixture as needed, and filling the mixture into containers suitable for various forms.

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, even more preferably 1% by mass or less, and is preferably substantially not contained, from the viewpoint of maintaining a cool feeling accompanying transpiration of sweat. Examples of the antiperspirant include aluminum chlorohydrate, zinc oxide, zinc phenolsulfonate, and dried alum.

The present invention also discloses the following compositions and methods relating to the above embodiments.

< 1 > A skin cosmetic comprising the following component (A) and component (B), wherein the mass ratio (A/B) of the component (A) to the component (B) is 0.01 to 2.5.

(A) Crosslinked resin powder with self-adhesive capacity

< 2 > the skin cosmetic composition of < 1 >, wherein the component (A) is preferably 1 or 2 or more selected from the group consisting of a crosslinked (meth) acrylate resin powder, a silicone elastomer spherical powder and a urethane resin powder, and more preferably a crosslinked (meth) acrylate resin powder.

< 3 > the skin cosmetic composition according to < 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 according to any one of the items < 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, further preferably 0.3 μm or more, and further preferably 20 μm or less, more preferably 10 μm or less, further preferably 5 μm or less, and further preferably 2.2 μm or less.

The skin cosmetic according to any one of < 5 > to < 1 > - < 4 >, wherein the component (B) is preferably selected from the group consisting of those having a specific surface area of 150m²Over 1000 m/g²Porous silica powder having a specific surface area of 150m or less²Over 1000 m/g²Porous calcium carbonate having a specific surface area of 150m or less per gram²Over 1000 m/g²1 or more of porous nylon powders having a specific surface area of 150m or less are preferable²Over 1000 m/g²A porous silica powder of not more than g.

[ 6] the skin cosmetic according to any one of [ 1 ] to [ 5 ], wherein the average particle size of the component (B) is preferably 0.5 μm or more, more preferably 3 μm or more, further preferably 5 μm or more, further preferably 10 μm or more, further preferably 50 μm or less, more preferably 30 μm or less, further preferably 20 μm or less.

The skin cosmetic according to any one of < 7 > to < 1 > < 6 >, wherein the mass ratio (A/B) of the component (A) to the component (B) is preferably 0.01 to 2.0, more preferably 0.01 to 1.0, further preferably 0.01 to 0.8, further preferably 0.05 to 0.8, and further preferably 0.10 to 0.4.

The skin cosmetic according to any one of < 8 > to < 7 >, wherein the content of the component (A) is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, further preferably 0.05% by mass or more, further preferably 1.0% by mass or more, further preferably 1.5% by mass or more, further preferably 2.0% by mass or more, and further preferably 20% by mass or less, more preferably 12% by mass or less, further preferably 10% by mass or less, and further preferably 5% by mass or less based on the total amount of the cosmetic.

The skin cosmetic according to any one of < 9 > to < 8 >, wherein the content of the component (B) is preferably 3% by mass or more, more preferably 5% by mass or more, further preferably 6% by mass or more, further preferably 10% by mass or more, and further preferably 30% by mass or less, more preferably 18% by mass or less, further preferably 15% by mass or less, based on the total amount of the cosmetic.

The skin cosmetic according to any one of < 10 > to < 7 >, wherein the cosmetic further comprises a bactericide as the component (C), preferably a bactericide selected from isopropyl methylphenol, triclosan, benzalkonium chloride, benzethonium chloride, halocarban, triclocarban, chlorhexidine hydrochloride, chlorhexidine gluconate and beta glycyrrhetinic acid, and more preferably isopropyl methylphenol.

< 11 > the skin cosmetic composition of < 8 > further comprising 1 or 2 or more selected from a carboxylic acid or a salt thereof as the component (D), 1, 3-butanediol as the component (E), and a nonionic surfactant having HLB 10-13 as the component (F).

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

< 13 > such as < 11 > or < 12 > wherein the carboxylic acid or salt thereof as the component (D) is 1 or 2 or more selected from the group consisting of monocarboxylic acid, dicarboxylic acid, hydroxycarboxylic acid, aromatic carboxylic acid, acidic amino acid and salts thereof.

The skin cosmetic according to any one of < 14 > to < 11 > to < 13 >, wherein the content of the component (D) is preferably 0.1 to 3% by mass, more preferably 0.2 to 2.8% by mass, and still more preferably 0.5 to 2.5% by mass, based on the total amount of the cosmetic.

The skin cosmetic according to any one of < 15 > to < 11 > - < 14 >, wherein the content of the component (E) is preferably 0.1 to 10% by mass, more preferably 0.5 to 8% by mass, and still more preferably 1 to 5% by mass, based on the total amount of the cosmetic.

[ 16 ] the skin cosmetic according to any one of [ 11 ] to [ 15 ], wherein the component (F) is a polyoxyethylene alkyl ether or a polyoxyethylene alkenyl ether having an alkyl group or an alkenyl group having 10 to 18 carbon atoms.

The skin cosmetic according to any one of < 17 > to < 11 > to < 16 >, wherein the content of the component (F) is preferably 0.01 to 1% by mass, more preferably 0.01 to 0.8% by mass, and still more preferably 0.01 to 0.5% by mass, based on the total amount of the cosmetic.

The skin cosmetic composition according to any one of < 18 > to < 11 > -17 > further comprising a nonionic surfactant having a glycerin group, which has an HLB value of 4 to 7 and is liquid at 25 ℃, as the component (G).

The skin cosmetic composition of any one of < 19 > such as < 1 > - < 18 > in the form of a cream.

< 20 > such as < 19 > wherein the cosmetic composition further comprises 1 or 2 or more selected from the following components: a solid oily component having a melting point of 60 ℃ or higher as component (H); a polyether-modified silicone of component (I); a powder other than the component (A) and the component (B) as the component (J); an antioxidant as ingredient (K); and a poly (N-acylalkyleneimine) bonded silicone polymer as the component (L).

The skin cosmetic composition of any one of < 21 > to < 20 > in the form of a ball.

< 22 > such as < 21 > wherein the cosmetic composition further comprises 1 or 2 or more selected from the following components: a lower alcohol having 2 to 4 carbon atoms as component (M); a water-soluble polymer as the component (N); 1 or 2 or more selected from sorbitan monooleate, sorbitan trioleate, sorbitan monoisostearate, polyoxyethylene oleyl ether and polyoxyethylene glyceryl triisostearate as the component (O); trimethylsiloxy silicic acid as the component (P); and a poly (N-acylalkyleneimine) bonded silicone polymer as the component (L).

The skin cosmetic composition of any one of < 23 > such as < 1 > -to < 22 > in the form of a mist, a spray or a lotion.

< 24 > the skin cosmetic as described in < 23 > further comprising 1 or 2 or more selected from polyoxyethylene polyoxypropylene decyltetradecyl ether as the component (Q) and polyether-modified silicone as the component (I).

< 25 > a method for transpiration of sweat, comprising the step of applying the skin cosmetic of any one of < 1 > to < 24 > to the skin.

< 26 > A method for forming a coating film composed of a combination of a component (A) and a component (B) on the surface of the skin, which comprises applying the skin cosmetic according to any one of < 1 > to < 24 > to the skin.

< 27 > a water evapotranspiration promoter comprising the following composition: contains the following components (A) and (B), and the mass ratio (A/B) of the component (A) to the component (B) is 0.01 to 2.5.

(A) Crosslinked resin powder with self-adhesive capacity

Use of the skin cosmetic of any one of < 28 > < 1 > to < 24 > as a deodorant.

Examples

The present invention will be described in further detail below with reference to examples.

A method for producing 3 kinds of powders (a1, a2, a3) which are crosslinked resin powders having self-adhesive ability as the component (a) will be described. Each powder is characterized in that it is kept to give a smooth feeling without stickiness to the skin and without dryness, and the average particle diameter is: a1 is 0.3 μm, a2 is 2.2 μm, and a3 is 10 μm. The respective production methods are shown below.

Production example 1 (production of powder (a 1))

85g of lauryl methacrylate, 15g of ethylene glycol dimethacrylate and 2g of lauroyl peroxide were charged into a beaker, and mixed and stirred to dissolve them. 400g of ion-exchanged water in which 0.75g of sodium N-stearoyl-N-methyltaurate (SMT) was dissolved was added thereto, and the mixture was dispersed by a homogenizer until the average particle diameter became 0.3. mu.m.

The dispersion was poured into a four-necked flask, and nitrogen gas was replaced with the dispersion for 30 minutes while stirring. The temperature inside the flask was heated to 80 ℃ by an oil bath, and polymerization was carried out for 5 hours from the time the temperature reached 80 ℃ and then cooled to room temperature. The dispersion of the polymerized particles was freeze-dried to recover the particles, thereby obtaining powder (a 1).

Production example 2 (production of powder (a 2))

Into a beaker were charged 82g of lauryl methacrylate, 3g of methacrylic acid, 15g of ethylene glycol dimethacrylate and 2g of lauroyl peroxide, and the mixture was dissolved with stirring. 400g of ion-exchanged water in which 0.75g of sodium N-stearoyl-N-methyltaurate (SMT) was dissolved was added thereto, and the mixture was dispersed by a homogenizer until the average particle diameter became 2.2. mu.m.

The dispersion was poured into a four-necked flask, and nitrogen gas was replaced with the dispersion for 30 minutes while stirring. The temperature inside the flask was heated to 80 ℃ by an oil bath, and polymerization was carried out for 5 hours from the temperature reached 80 ℃ and then cooled to room temperature. The dispersion of the polymerized particles was freeze-dried to recover the particles, thereby obtaining powder (a 2).

Production example 3 (production of powder (a 3))

Into a beaker were charged 82g of lauryl methacrylate, 3g of methacrylic acid, 15g of ethylene glycol dimethacrylate and 2g of lauroyl peroxide, and the mixture was dissolved with stirring. 400g of ion-exchanged water in which 0.75g of Sodium Dodecyl Sulfate (SDS) was dissolved was added thereto, and the mixture was dispersed by a homogenizer until the average particle size became 10 μm.

The dispersion was poured into a four-necked flask, and nitrogen gas was replaced with the dispersion for 30 minutes while stirring. The temperature inside the flask was heated to 80 ℃ by an oil bath, and polymerization was carried out for 5 hours from the time the temperature reached 80 ℃ and then cooled to room temperature. The dispersion of the polymerized particles was freeze-dried to recover the particles, thereby obtaining powder (a 3).

Examples 1 to 37 and comparative examples 1 to 11

The samples described in tables 1 to 5 were produced, and the water diffusibility, the abrasion resistance and the water resistance were evaluated. The results are shown in tables 1 to 5.

(production method)

The component (A) and the component (B) were measured, ion-exchanged water was added thereto, and the mixture was stirred and mixed by a propeller.

(Water diffusibility test)

The sample was coated on a glass plate in a size of 4 cm. times.4 cm (coating weight 0.1 mL/cm)²) And allowed to dry. 0.5mL of water was dropped on the center of the dried coating film, and the diameter of the concentric circles after spreading on the coating film for 1 minute was measured. The larger the value, the more excellent the water diffusibility.

(Friction resistance)

(1) The sample was coated on a glass plate at 0.l mL/cm²And allowed to dry. The weight of the dried coating film was measured (weight a).

(2) A load of 20g was applied to qualitative filter paper (brand name: Whatman 1), and the film was reciprocated 5 times on the dry coating film.

(3) The weight of the dried coating film after rubbing was measured (weight b).

(4) The friction resistance value (b/a × 100) was calculated from the values obtained in (1) and (3). The larger the value, the more excellent the friction resistance.

(Water resistance)

(1) The sample was coated on a glass plate at 0.1mL/cm²And allowed to dry. The weight of the dried coating film was measured (weight a)

(2) The glass carrier plate was immersed in a beaker containing ion-exchanged water so that the dried coating film was immersed in water, and allowed to stand for 6 hours.

(3) The glass plate was taken out and dried, and then the weight of the dried coating was measured (weight b).

(4) The water resistance value (b/a × 100) was calculated from the values obtained in (1) and (3). The larger the value, the more excellent the water resistance.

Next, examples of the production of the cosmetic of the present invention will be described.

The obtained skin cosmetic has excellent transpiration properties of sweat, does not disappear from the skin due to sweat or friction, and has excellent transpiration properties of sweat over a long period of time.

Example 38

[ Table 6]

Example 39

[ Table 7]

The astringent of example 39 had a water diffusibility value of 16mm, a rub resistance value of 76% and a water resistance value of 72%.

Example 40

[ Table 8]

The cosmetic preparation of example 40 had a water diffusibility value of 17mm, a rub resistance value of 75% and a water resistance value of 74%.

EXAMPLE 41

[ Table 9]

The cosmetic preparation of example 41 had a water diffusibility value of 13mm, a rub resistance value of 72% and a water resistance value of 70%.

Claims

1. A skin cosmetic characterized by:

contains the following components (A) and (B), and the mass ratio (A/B) of the component (A) to the component (B) is 0.06-2.5,

(A) a crosslinked resin powder having an average particle diameter of 0.09 to 4 μm and self-adhesive ability,

(B) the specific surface area is 150m²Over 1000 m/g²A spherical water-absorbent powder having a particle size of less than or equal to g,

the content of the component (B) is 5 to 30 mass% in the total amount of the skin cosmetic.

2. The skin cosmetic of claim 1, wherein:

the component (A) is at least 1 selected from the group consisting of a crosslinked (meth) acrylate resin powder, a silicone elastomer spherical powder, and a urethane resin powder.

3. The skin cosmetic of claim 1, wherein:

the component (B) is at least 1 selected from porous silica powder, porous nylon powder and porous calcium carbonate.

4. A skin cosmetic according to any one of claims 1 to 3, characterized in that:

the average particle diameter of the component (A) is 0.1 to 4 μm.

5. A skin cosmetic according to any one of claims 1 to 3, characterized in that:

the average particle diameter of the component (B) is 0.5 to 50 μm.

6. A skin cosmetic according to any one of claims 1 to 3, characterized in that:

the component (A) is a crosslinked (meth) acrylate resin powder.

7. A skin cosmetic according to any one of claims 1 to 3, characterized in that:

the component (B) has a specific surface area of 150m²Over 1000 m/g²A silica powder of not more than g.

8. A skin cosmetic according to any one of claims 1 to 3, characterized in that:

further contains a bactericide as the component (C).

9. The skin cosmetic of claim 8, wherein:

the bactericide of the component (C) is at least 1 selected from the group consisting of isopropylmethylphenol, triclosan, benzalkonium chloride, benzethonium chloride, halocarban, triclocarban, chlorhexidine hydrochloride and chlorhexidine gluconate.

10. The skin cosmetic of claim 8, wherein:

further comprising a carboxylic acid or a salt thereof as a component (D), 1, 3-butanediol as a component (E), and a nonionic surfactant having HLB of 10-13 as a component (F).

11. The skin cosmetic of claim 8, wherein:

further contains a nonionic surfactant having a glyceryl group, which has an HLB of 4 to 7 and is liquid at 25 ℃, as component (G).

12. A skin cosmetic according to any one of claims 1 to 3, characterized in that:

it is in the form of cream.

13. The skin cosmetic of claim 12, wherein:

also contains 1 or more than 2 selected from the following components:

a solid oily component having a melting point of 60 ℃ or higher as component (H); a polyether-modified silicone as component (I); a powder other than the component (A) and the component (B) as the component (J); an antioxidant as ingredient (K); and a poly (N-acylalkyleneimine) bonded silicone polymer as the component (L).

14. A skin cosmetic according to any one of claims 1 to 3, characterized in that:

it is of the ball type.

15. The skin cosmetic of claim 14, wherein:

also contains 1 or more than 2 selected from the following components:

a lower alcohol having 2 to 4 carbon atoms as component (M); a water-soluble polymer as the component (N); 1 or 2 or more selected from sorbitan monooleate, sorbitan trioleate, sorbitan monoisostearate, polyoxyethylene oleyl ether and polyoxyethylene glyceryl triisostearate as the component (O); a poly (N-acylalkyleneimine) bonded silicone polymer as the component (L); and trimethylsiloxy silicic acid as the component (P).

16. A skin cosmetic according to any one of claims 1 to 3, characterized in that:

it is in the form of mist, spray or lotion.

17. The skin cosmetic of claim 16, wherein:

also contains 1 or more than 2 selected from the following components:

polyoxyethylene polyoxypropylene decyltetradecyl ether as the component (Q); and a polyether-modified silicone as component (I).

18. A skin cosmetic according to any one of claims 1 to 3, characterized in that:

the average particle diameter of the component (A) is 0.3 to 4 μm.

19. A skin cosmetic according to any one of claims 1 to 3, characterized in that:

the component (A) is a crosslinked (meth) acrylate resin powder having an average particle diameter of 0.3 to 4 μm.

20. A skin cosmetic according to any one of claims 1 to 3, characterized in that:

the average particle diameter of the component (B) is 3 to 30 μm.

21. A skin cosmetic according to any one of claims 1 to 3, characterized in that:

the mass ratio (A/B) of the component (A) to the component (B) is 0.10 to 0.4.

22. A skin cosmetic according to any one of claims 1 to 3, characterized in that:

the content of the component (A) is 1.0-12% by mass in the total amount of the cosmetic.

23. A skin cosmetic according to any one of claims 1 to 3, characterized in that:

the content of the component (B) is 5 to 18 mass%.

24. Use of the skin cosmetic according to any one of claims 1 to 23 as a deodorant.

25. A method of transpiration of sweat comprising:

a step of applying the skin cosmetic according to any one of claims 1 to 23 to the skin.

26. A method for forming a coating film on the surface of skin, characterized by:

the coating film is formed by compounding a component (A) and a component (B),

the method comprises the step of applying the skin cosmetic of any one of claims 1 to 23 to the skin.

27. An agent for promoting water transpiration, characterized by:

a composition comprising: contains the following components (A) and (B), and the mass ratio (A/B) of the component (A) to the component (B) is 0.06-2.5;

(A) a crosslinked resin powder having an average particle diameter of 0.09 to 4 μm and having self-adhesive ability;

the content of the component (B) is 5 to 30% by mass in the total amount of the composition.