JP2003055152A - Cosmetic composition for skin makeup - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a cosmetic composition for skin makeup having good spreadability on the skin, causing no stickiness and imparting fresh feeling in use. SOLUTION: This cosmetic composition for skin makeup contains (A) colloidal silica core-silicon shell body consisting of (1) 90-10 wt.% of colloidal silica core and (2) 10-90 wt.% of a shell of a polyorganosiloxane expressed by the average composition formula: R<1> a SiO(4-a)/2 [wherein, R<1> is a (substituted) identical or different monovalent hydrocarbon group; and (a)=1.80-2.20], and (B) a polyorganosiloxane. The content ratio of the silica core-silicone shell body (A) is 0.5-10 wt.%, and that of the polyorganosiloxane (B) is 0.5-50 wt.%.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a skin / makeup cosmetic containing a colloidal silica core-silicone shell and a polyorganosiloxane, and more specifically, it has good water resistance, oil resistance and sweat resistance. The present invention relates to a cosmetic composition for skin / makeup, which spreads well on the skin, has no stickiness, and has a refreshing feeling in use.

[0002]

2. Description of the Related Art In general, cosmetic compositions for skin and make-up are polymer compounds for the purpose of protecting the skin from irritating substances, imparting moisturizing properties and improving makeup sustainability, as well as usability and use. It has a constitution containing an oil agent for the purpose of improving the touch feeling. That is, while a polymer compound such as an acrylic polymer compound or a cellulose polymer compound is blended as a film-forming component, an oil agent such as silicone oil is blended in order to improve usability and feel during use. ing.

[0003]

However, in the conventional cosmetic compositions for skin and make-up,
There is a tendency for makeup makeup to be easily caused by moisture such as sweat, tears, rain, snow, etc., or an oil agent for other cosmetics, and improvement in water resistance, oil resistance and sweat resistance has been desired.

In response to such a demand, Japanese Patent Laid-Open No. 10-1
14622 discloses that the adhesion to the skin is good,
As a skin cosmetic composition having excellent water resistance, oil resistance and sweat resistance, a composition containing a colloidal silica core-silicone shell as an essential component is disclosed.

However, there is a problem with this cosmetic composition in that the extension during use, that is, the extension on the skin surface, is not sufficient.

The inventors of the present invention have conducted extensive studies in response to the above circumstances, and as a result, have a specific weight ratio of a silica core-silicone shell body made of siloxane-bonded polyorganosiloxane to colloidal silica and polyorganosiloxane. Not only is it excellent in water resistance, oil resistance, and sweat resistance when blended with, but surprisingly spreads better when used alone than when polyorganosiloxane is used alone, and feels refreshed on the skin. It was found that can be given.

The present invention has been made on the basis of such findings, and an object of the present invention is to provide a cosmetic composition for skin / makeup, which has good spreadability on the skin, and has a refreshing feeling without stickiness. And

[0008]

That is, the cosmetic composition for skin / makeup of the present invention comprises (A) (1) 90 to 10% by weight of a core of colloidal silica, and (2) an average composition formula R ¹ _a SiO _{(4-a) / 2} (wherein R ¹ is a substituted or unsubstituted monovalent hydrocarbon group which is the same or different and a is 1.80)
To a number of 2.20), and a colloidal silica core-silicone shell consisting of 10 to 90% by weight of a polyorganosiloxane shell, and (B) a polyorganosiloxane, wherein the (A) colloidal silica core −
The content of the silicone shell is 0.5 to 10% by weight, and the content of the polyorganosiloxane (B) is 0.5 to 50% by weight.

Here, the colloidal silica core-silicone shell body is described in Japanese Patent No. 2992591, in which colloidal silica is used as a core.
At least a part of the surface is mainly coated with silicone, that is, polyorganosiloxane as a shell, and may have a form in which some separated silicone particles are contained.

The colloidal silica core-silicone shell body used in the present invention, after water is removed,
It is a component forming an elastomer cured product, and is obtained by covering the colloidal silica of the component (1) with the polyorganosiloxane of the component (2).

More specifically, basically, this colloidal silica core-silicone shell body is one in which both ends of polyorganosiloxane are bonded to the silica surface through siloxane bonds, and one end of polyorganosiloxane is siloxane. It is composed of three forms: one bound to the silica surface via a bond and the other end is blocked with a hydroxyl group, and the other end of the polyorganosiloxane is blocked with a hydroxyl group and has no siloxane bond with the silica surface. There is.

The component (1) of the colloidal silica core-silicone shell, that is, colloidal silica, is SiO
Refers to an underwater dispersion having ₂ as a basic unit,
The average particle diameter is 4 to 300 nm, more preferably 30 to 1
It is 50 nm.

The colloidal silica can be classified into acidic and alkaline according to the characteristic classification, and it can be appropriately selected and used depending on the conditions at the time of emulsion polymerization when producing the core-shell body. For example, when emulsion polymerization is performed under acidic conditions using an anionic surfactant, it is preferable to use acidic colloidal silica.

The component (2) of the colloidal silica core-silicone shell body of the present invention, that is, the shell of polyorganosiloxane is selected in the range of 10 to 90% by weight. The reason is that with less than 10% by weight of polyorganosiloxane, the surface of the colloidal silica cannot be sufficiently covered, resulting in a colloidal silica core-silicone shell body with poor stability, and when it exceeds 90% by weight. This is because the reinforcing property of colloidal silica is not sufficient and the cured product of the elastomer lacks mechanical properties. In other words, in any case out of the above range, the cosmetic composition for skin / makeup having good water resistance, oil resistance and sweat resistance does not function.

Further, the above-mentioned average compositional formula R ¹ _a S showing the shell of the core-shell body (2) polyorganosiloxane
In iO _{(4-a) / 2} , R ¹ bonded to the silicon atom is
A substituted or unsubstituted monovalent hydrocarbon group of the same or different type.

Here, examples of the unsubstituted monovalent hydrocarbon group include linear or branched alkyl groups such as methyl group, ethyl group, propyl group, hexyl group, octyl group, decyl group, hexadecyl group and octadecyl group. Group, phenyl group, naphthyl group, aryl group such as xenyl group, benzyl group, β-phenylethyl group, methylbenzyl group, aralkyl group such as naphthylmethyl group, cyclohexyl group,
Examples thereof include cycloalkyl groups such as cyclopentyl group.

On the other hand, as the substituted monovalent hydrocarbon group,
A group obtained by substituting the hydrogen atom of the above-mentioned unsubstituted monovalent hydrocarbon group with a halogen atom such as fluorine or chlorine, for example, 3,
Examples include 3,3-trifluoropropyl group and 3-fluoropropyl group.

A methyl group is preferred as R ¹ because it is easily available and manufactured.

The (A) colloidal silica core-silicone shell body used in the present invention can be generally produced as follows. That is, (1) colloidal silica (core component) and (2) R ² _n SiO _{(4-n) / 2} (wherein R ² is a substituted or unsubstituted monovalent hydrocarbon group of the same or different type; Is a number of 0 to 3), and an organosiloxane having 2 to 10 silicon atoms and having no hydroxyl group is prepared. Next, an emulsion of a colloidal silica core-silicone shell body is prepared by polycondensing an organosiloxane with colloidal silica in an aqueous medium in the presence of a surfactant.

In preparing the emulsion of the colloidal silica core-silicone shell body, in order to keep the colloidal silica in a stable state, a combination of acidic colloidal silica-anionic surfactant and alkaline colloidal silica-cationic surfactant is used. select. In addition, the amount of water used in this emulsification / emulsification is the total amount of colloidal silica component and organosiloxane component 1
4.3 to 90 parts by weight, preferably 6.
It is 7 to 40 parts by weight, and the solid content concentration of the emulsion system is 10 to 70% by weight, preferably 20 to 60% by weight. Furthermore, the temperature of colloidal silica core-silicone shell formation (condensation reaction etc.) is about 5 to 100 ° C. In addition, in order to improve the strength of the shell portion, a cross-linking agent such as silanes having a functional group can be added to the organosiloxane component forming the silicone shell.

The above-prepared emulsion of colloidal silica core-silicone shell body exhibits acidity or alkalinity. Therefore, in order to maintain long-term stability, alkali or acid is added to neutralize the emulsion. Here, examples of the alkaline neutralizing agent include sodium hydroxide, sodium carbonate, sodium hydrogen carbonate, and triethanolamine, and examples of the acidic neutralizing agent include hydrochloric acid, sulfuric acid, nitric acid, acetic acid, oxalic acid, and the like. Can be mentioned.

Specific examples of the polyorganosiloxane, which is a raw material component of the polyorganosiloxane forming the shell of the core-shell body used in the present invention, are as follows. That is, hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, 1,3,5,7-tetramethyl-1,3,5,7-tetraphenylcycle tetrasiloxane, 1,3,5 Examples of cyclic compounds include 7,7-tetrabenzyltetramethylcyclotetrasiloxane and 1,3,5,7-tris- (3,3,3-trifluoropropyl) trimethylcyclotetrasiloxane, which may be used alone or in combination. You may use it in the above mixing system.

The following silanes are used as the silane compound used to introduce a group containing an organic functional group.

As the silane compound containing an organic functional group,
3-aminopropylmethyldimethoxysilane, 3-aminopropyltrimethoxysilane, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, N-triethylenediaminepropylmethyldimethoxysilane,
3-glycidoxypropylmethyldimethoxysilane,
Examples include 3,4-epoxycyclohexylethyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane, trifluoropropyltrimethoxysilane, and 3-carboxypropylmethyldimethoxysilane. These are used alone or in a mixture of two or more kinds. You may.

In the preparation of the emulsion of the colloidal silica core-silicone shell body according to the present invention, an anionic surfactant or a cationic surfactant is appropriately used as a surfactant mainly serving as an emulsifier. As described above, when acidic colloidal silica is used as a raw material, it is preferable to use an anionic surfactant, and when alkaline colloidal silica is used as a raw material, it is preferable to use a cationic surfactant.

Here, as the anionic surfactant,
Aliphatic substituted benzene sulfonic acids, aliphatic hydrogen sulphates, and mixtures of unsaturated aliphatic sulfonic acids and hydroxylated aliphatic sulfonic acids each represented by the following general formula are preferred.

R ³ C ₆ H ₄ SO ₃ H

R ³ OSO ₃ H

R ⁴ CH = CH (CH ₂ ) _n SO ₃ H

R ⁴ CH ₂ CH (OH) (CH ₂ ) _n SO ₃ H However, in the formula, R ³ is a monovalent aliphatic hydrocarbon group having 6 to 30 (preferably 6 to 18) carbon atoms, R ⁴ is a monovalent aliphatic hydrocarbon group having 1 to 30 (preferably 6 to 18) carbon atoms, and n is an integer having 6 to 30 total carbon atoms.

Examples of R ³ and R ⁴ include hexyl group, octyl group, decyl group, dodecyl group, cetyl group, stearyl group, myricyl group, oleyl group, nonenyl group, octynyl group, phytyl group and pentadecadicadyl group. Examples thereof include an enyl group. Further, examples of the anionic surfactant having an R ³ group include hexylbenzenesulfonic acid, octylbenzenesulfonic acid, dodecylbenzenesulfonic acid, cetylbenzenesulfonic acid, octylsulfate, laurylsulfate, oleylsulfate and cetylsulfate. . Examples of the anionic surfactant having an R ⁴ group include tetradecene sulfonic acid and hydroxytetradecane sulfonic acid.

Among the anionic surfactants represented by the above general formula, anionic surfactants having a weak catalytic action, such as sodium dodecylbenzenesulfonate, sodium octylbenzenesulfonate, ammonium dodecylbenzenesulfonate, and sodium lauryl. Sulfate, ammonium lauryl sulfate, triethanolamine lauryl sulfate, sodium tetradecene sulfonate, sodium hydroxytetradecene sulfonate, etc. can be used in combination with the polymerization catalyst.

Here, the polymerization catalyst used in combination is usually a catalyst used for the polymerization of low molecular weight organosiloxanes such as aliphatic-substituted benzenesulfonic acid, aliphatic hydrogen sulfates, unsaturated aliphatic sulfonic acid and water. Examples include, but are not limited to, mixtures with oxidized aliphatic sulfonic acids, hydrochloric acid, sulfuric acid, phosphoric acid, and the like, although these acidic catalysts are preferred. That is, any catalyst can be used in combination as long as it can polymerize a low molecular weight organosiloxane in the presence of water.

The anionic surfactant is not limited to those represented by the above general formula. For example, polyoxyethylene (4) lauryl ether sulfate, polyoxyethylene (13) cetyl ether sulfate, polyoxyethylene (6) stearyl ether sulfate, polyoxyethylene (4) sodium lauryl ether sulfate, polyoxyethylene (4) octylphenyl Polyoxyethylene alkyl ether sulfates such as ammonium ether sulfate or salts thereof, polyoxyethylene (3) lauryl ether carboxylic acid, polyoxyethylene (3) stearyl ether carboxylic acid, polyoxyethylene (6)
It is also possible to use one kind or a mixture of two or more kinds of polyoxyethylene alkyl ether carboxylic acid esters such as sodium lauryl ether carboxylate and sodium polyoxyethylene (6) octyl ether carboxylate, or salts thereof.

The amount of the anionic surfactant used is emulsification /
0.5 to 20 parts by weight, more preferably 0.5 to 10 parts by weight, based on 100 parts by weight of the total amount of the colloidal silica forming the emulsion and the organosiloxane forming the shell.
Parts by weight. Here, if it is less than 0.5 parts by weight, the stability of the produced emulsion may be poor and may be separated, and if it exceeds 20 parts by weight, the produced emulsion may be thickened and the fluidity may be lowered. . When the polymerization catalyst is used in combination, the amount of the polymerization catalyst used is in the range of 0.05 to 10 relative to 100 parts by weight of the total amount of the colloidal silica forming the core and the organosiloxane forming the shell.
About parts by weight is preferable.

On the other hand, as the cationic surfactant, general formula

[Chemical 1] (However, in the formula, R ⁵ is an aliphatic monovalent hydrocarbon group having 6 or more carbon atoms, preferably 8 to 18 carbon atoms, R ⁶ ,
R ⁷ and R ⁸ are each a monovalent organic group, and X is a hydroxyl group, a chlorine atom or a bromine atom).

Here, R ⁵ is, for example, a hexyl group,
Examples thereof include an octyl group, a decyl group, a dodecyl group, a cetyl group, a stearyl group, a myricyl group, an oleyl group, a nonenyl group, an octynyl group, a phytyl group and a pentadecadienyl group. R ⁶ , R ⁷ and R ⁸ are the same or different monovalent organic groups such as alkyl groups such as methyl group, ethyl group and propyl group, alkenyl groups such as vinyl group and allyl group, phenyl group, Examples thereof include aryl groups such as a xenyl group and a naphthyl group, and cycloalkyl groups such as a cyclohexyl group.

Examples of the quaternary ammonium-based surfactants include lauryl trimethyl ammonium hydroxide, stearyl trimethyl ammonium hydroxide,
Dioctyl dimethyl ammonium hydroxide, distearyl dimethyl ammonium hydroxide, lauryl trimethyl ammonium chloride, stearyl trimethyl ammonium chloride, cetyl trimethyl ammonium chloride, dicocoyl dimethyl ammonium chloride, distearyl dimethyl ammonium chloride, benzalkonium chloride, stearyl dimethyl benzyl ammonium chloride And the like, and these can be used alone or as a mixture of two or more kinds.

Since the cationic surfactant has a weak catalytic action, it is desirable to use a polymerization catalyst in combination with an alkali metal hydroxide such as lithium hydroxide, sodium hydroxide, potassium hydroxide or rubidium hydroxide. .

The amount of the cationic surfactant used is
0.5 to 50 parts by weight, and more preferably 0.5 to 50 parts by weight, based on 100 parts by weight of the total amount of the colloidal silica forming the core and the organosiloxane forming the shell that are emulsified and emulsified.
~ 20 parts by weight. Here, if less than 0.5 part by weight,
The cationicity is insufficient, and the stability of the resulting emulsion is poor, and separation may occur. On the other hand, if it exceeds 50 parts by weight, the resulting emulsion may be thickened and the fluidity may be lowered. When using a polymerization catalyst together,
The combined use amount of the polymerization catalyst is 100 in total of the colloidal silica forming the core and the organosiloxane forming the shell.
About 0.05 to 10 parts by weight is preferable with respect to parts by weight.

Further, a cationic colloidal silica core-silicone shell body produced by the method described in JP-A-9-137062 can also be used. That is, this method comprises emulsion polymerization using an anionic surfactant to terminate the reaction, then adding a nonionic surfactant and / or an amphoteric surfactant as a miscible surfactant, and further adding a cationic surfactant. This is a method of adding a surfactant to convert it into a cationic one.

The silicone emulsion containing the colloidal silica core-silicone shell produced by such emulsion polymerization has an average particle diameter of 350 nm or less and is an extremely stable emulsion. The compounding stability when compounded with an aqueous skin cosmetics such as cream, milky lotion, lotion, makeup cosmetic, and cleansing is also particularly good.

In the present invention, the polyorganosiloxane of the component (B) used in combination with the colloidal silica core-silicone shell of the component (A) has an average composition formula R ¹ _a SiO _{(4-a) / 2} (wherein R ¹ is a substituted or unsubstituted, identical or different 1
Valent hydrocarbon group, a is a dimethyl silicone represented by 1.80 to 2.20), the structure of which is cyclic,
It may have either a chain structure or a branched structure. As the cyclic dimethyl silicone, silicone having 4 to 6 silicon atoms, that is, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane are preferably used because they are easily manufactured and available. Further, the viscosity of dimethyl silicone is 1 to 50,000,000 cP at 25 ° C.,
It is preferably in the range of 2 to 30,000,000 cP. When the viscosity is less than 1 cP, the effect of improving the spread to the skin is small, and the polyorganosiloxane having a viscosity exceeding 50,000,000 cp is substantially difficult to produce. For use, cyclic, chain, or branched silicone may be used alone or in combination of two or more kinds. Further, silicones having a single viscosity or silicones having different viscosities may be blended.

Specific examples of the polyorganosiloxane used in addition to dimethyl silicone include methylphenyl silicone, polyether modified silicone, alkyl modified silicone, etc., which may be used alone or in admixture of two or more. You can Among them, dimethyl silicone and methylphenyl silicone are preferably used because they have a great effect of suppressing stickiness to the skin and improving spread. These polyorganosiloxanes can be produced by a known method.

As a form of blending the polyorganosiloxane into the skin / makeup cosmetics, there is no problem if oily silicone is directly blended, but creams, emulsions, lotions, makeup cosmetics, cleansing powders, etc. When it is added to the aqueous skin cosmetic, it is preferably added in the form of an emulsion. That is, emulsification is performed using water and various surfactants, and compounding is performed in the form of being dispersed in water. In this case, the obtained emulsion is classified into a macro emulsion (dispersion particle size of 400 nm or more), a microemulsion (dispersion particle size of 100 nm or less), and an intermediate particle size mini emulsion (dispersion particle size of 100 to 400 nm). However, there are no restrictions on use, and all emulsions are targeted.

The method for producing the above silicone emulsion may be a known method. For example, in addition to an emulsion polymerization method in which a cyclic siloxane such as octamethyltetrasiloxane or a hydroxyl-blocked dimethylsiloxane is used as a monomer, an emulsification machine such as a colloid mill, a line mill, a homomixer, and a homogenizer, an anchor mixer and a homomixer, or an anchor mixer and a disper mixer. However, the method is not limited to these.

Surfactants used in producing the silicone emulsion include anionic, cationic, and
All of the nonionic and amphoteric surfactants can be used, and they can be used alone or in combination of two or more.

Examples of the anionic surfactant include dodecylbenzene sulfonic acid, octylbenzene sulfonic acid, polyoxyethylene lauryl sulfate, lauryl sulfate, tetradecene sulfonic acid, hydroxytetradecene sulfonic acid, and their sodium salts, potassium salts and trisulfates. Examples include ethanolamine salts.

Examples of the cationic surfactant include lauryl trimethyl ammonium hydroxide, stearyl trimethyl ammonium hydroxide, dioctyl dimethyl ammonium hydroxide, distearyl dimethyl ammonium hydroxide, lauryl trimethyl ammonium chloride, stearyl trimethyl ammonium chloride, cetyl trimethyl ammonium chloride. , Dicocoyldimethylammonium chloride, distearyldimethylammonium chloride, benzalkonium chloride, stearyldimethylbenzylammonium chloride and the like.

As the nonionic surfactant, polyoxyethylene lauryl ether, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, sorbitan fatty acid ester, glycerin fatty acid ester, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitol fatty acid. Examples thereof include esters.

Examples of the amphoteric surfactant include lauryl amine oxide, lauryl betaine and cocoamidopropyl betaine.

In the present invention, the content ratio of the colloidal silica core-silicone shell component (A) is 0.5 to 10% by weight of the total composition, and the content ratio of the polyorganosiloxane component (B) is. , 0.5 to 50% by weight. That is, the weight ratio (A) / (B) of the components (A) and (B) is in the range of 1/100 to 20/1, and the total amount of the components (A) and (B) is It is 1 to 60% by weight of the total composition.

When the weight ratio of (A) / (B) is less than 1/100, even if the colloidal silica core-silicone shell is blended, there is no effect of improving water resistance, oil resistance and sweat resistance. In addition, the adhesion is comparable to that obtained by using polyorganosiloxane alone. On the other hand, if the blending ratio exceeds 20/1, the adhesion to the skin will be sufficient but the spreadability will deteriorate. Also,
If the total content is less than 1% by weight, the effects of improving water resistance, oil resistance, perspiration resistance, and spreading during application cannot be obtained, and if it exceeds 60% by weight, silicone is unnecessarily deposited on the skin. This is because not only does it feel greasy, but it also causes a loss of water resistance, oil resistance, and sweat resistance.

The cosmetic composition for skin / makeup according to the present invention contains various volatile or non-volatile components other than the colloidal silica core-silicone shell of the component (A) and the polyorganosiloxane of the component (B). It is prepared by mixing components such as oil, surfactant, lubricant, antiseptic, antioxidant, fragrance and powder.

Examples of the volatile or non-volatile oil agent include straight chain or branched chain hydrocarbons, higher alcohols,
Higher fatty acid, synthetic ester oil of alcohol and fatty acid,
Examples thereof include sucrose ester, waxes and waxes.

As the surfactant, polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, sorbitan fatty acid ester, glycerin fatty acid ester,
Examples thereof include polyoxyethylene hydrogenated castor oil and polyoxyethylene sorbitol fatty acid ester.

As the lubricant, sorbitol, glycerin, propylene glycol, 1,3-butylene glycol,
Examples thereof include maltitol, lactic acid, sodium lactate, polyethylene glycol and the like. Examples of preservatives include paraoxybenzoic acid alkyl ester, sodium benzoate, potassium sorbate, and phenoxyethanol. Further, antioxidants include tocopherol and lecithin, and powders include titanium oxide, zinc oxide, ultramarine blue, chromium oxide, iron oxide, talc, sericite, mica, kaolin, organic pigments, polymethylsilsesquioxy. Sun and so on.

Further, in the preparation of the cosmetic composition for skin / makeup, in order to improve the stability of the cosmetic composition, before the emulsification / emulsification of the colloidal silica forming the core and the organosiloxane forming the shell. Alternatively, a nonionic surfactant may be added and used after emulsification and emulsification. If added before emulsification or emulsification, the catalytic action of the anionic or cationic surfactant may be impaired.
It is preferable to use the anionic or cationic surfactant in an amount of 0 to 500 parts by weight per 100 parts by weight.

Here, as the nonionic surfactant,
For example, polyoxyethylene (6) lauryl ether, polyoxyethylene (7) cetyl ether, polyoxyethylene (20) stearyl ether, polyoxyethylene (3) octylphenyl ether, polyoxyethylene (18) nonylphenyl ether, monostearin. Acid polyethylene glycol (EO14), polyethylene glycol distearate (EO80), polyoxyethylene (20) sorbitan, polyoxyethylene (20)
Hydrogenated castor oil, polyoxyethylene monolaurate (2
0) sorbitan, polyoxyethylene (20) sorbitan monobalmitate, polyoxyethylene (6) sorbitan monostearate, polyoxyethylene (20) sorbitan trioleate, polyoxyethylene tetraoleate (40) sorbit, monooleic acid Polyoxyethylene (15) glyceryl, polyoxyethylene (15) glyceryl monostearate, sorbitan monobalmitate, polyoxyethylene (10) behenyl ether, polyoxyethylene (10) phytosterol,
Examples thereof include polyoxyethylene (10) polyoxypropylene (4) cetyl ether, polyoxyethylene (5) stearyl amine, polyoxyethylene (8) stearyl propylene diamine, and polyoxyethylene (5) cetyl ether sodium phosphate. Among these nonionic surfactants, it is preferable to use a nonionic surfactant having an HLB (hydrophilic / lipophilic balance) of 6 to 20 in combination because the emulsion of the obtained core-shell body has good stability.

The cosmetic composition for skin / makeup according to the present invention comprises a shell body in which a silicone shell covers a core of colloidal silica through a siloxane bond, and a polyorganosiloxane such as dimethyl silicone or diphenyl silicone. It is an essential ingredient. Therefore, due to the action of the colloidal silica core-silicone shell, the adhesion to the skin is good and the water resistance, oil resistance, and
It has excellent sweat resistance and colloidal silica core
By using the silicone shell and the polyorganosiloxane together, it is possible to impart a more refreshing feel to the skin and a non-greasy feel, as compared with the case where the polyorganosiloxane is used alone.

Specific examples of the cosmetic composition for skin / makeup according to the present invention include liquid cosmetics such as lotions and beauty liquids, emulsion cosmetics such as emulsions, creams and liquid foundations, lipsticks and foundations. , Eyeliner, mascara, solid white powder, blusher and the like or solid cosmetics.

[0062]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. Parts and% in the examples are unless otherwise specified.
Parts by weight and% by weight.

The average particle size of the colloidal silica and the colloidal silica core-silicone shell material used as the raw material was measured by a laser particle size analysis system LPA-3000S / 3100 (manufactured by Otsuka Electronics Co., Ltd.) using the dynamic light scattering method. It was measured.

When the colloidal silica core-silicone shell is regarded as a graft polymer, in other words, the graft ratio and graft efficiency when the colloidal silica core is the trunk polymer and the silicone shell is the branch polymer are as follows. Asked by the method.

That is, an emulsion containing a colloidal silica core-silicone shell was prepared at 40 ° C./0.
5 mmHg, a certain amount of colloidal silica core-silicone shell body (dried product) obtained by drying under reduced pressure for 5 hours (Y)
Is placed in cyclohexane, set on a shaker, and shaken for 24 hours. By this shaking, the free polyorganosiloxane is dissolved in cyclohexane, and the insoluble matter is collected by centrifuging for 30 minutes at a rotation speed of 2300 rpm using a centrifuge. Next, use a vacuum dryer for 120
The weight (M) of the insoluble matter obtained by drying at ℃ for 1 hour is measured,
The graft ratio and graft efficiency were calculated by the following equations.

[Equation 1]

[Equation 2]

The shell portion ratio of the colloidal silica core-silicone shell body was calculated by the following procedure. The nonvolatile content [%] is an average value of the values obtained when three 2 g samples were heated at 105 ° C. for 3 hours.

Calculation of effective amount of colloidal silica [part] The amount of colloidal silica dispersion used [part] × active component of colloidal silica [%]. Calculation of theoretical non-volatile content [%] {(effective amount of colloidal silica [part] + amount of organosiloxane used [part] + amount of emulsifier [part]) / total amount of raw material used [part]} × 100 amount of unpolymerized organosiloxane [ Part] (total used raw material part [part] x (theoretical non-volatile content [%]-non-volatile content [%])) / 100 Calculated amount of polymerized organosiloxane [part] Use amount of organosiloxane [part] -unpolymerized Amount of organosiloxane [parts] Calculation of polymerization rate Polymerized organosiloxane amount [parts] / Amount of organosiloxane used [parts] Calculation of shell part ratio Polymerized organosiloxane amount [parts] / (Polymerized organosiloxane amount [parts] + colloidal silica Effective amount [part]) x 1
00

Reference Example 1 (Preparation of colloidal silica core-silicone shell emulsion) Snowtex OL-40 which is an acidic colloidal silica.
(Nissan Chemical Co., Ltd., average particle size 84 nm, SiO
₂ 40.8%, Na ₂ O 0.0049%, pH 2.3;
Silica-1) 500 parts, ion-exchanged water 647.8
And 8.2 parts of n-dodecylbenzenesulfonic acid (manufactured by Nissan Chemical Industries, Ltd., Soft Oarai 5S) were mixed with 204 parts of octamethylcyclotetrasiloxane, and preliminarily stirred with a homomixer. Then, the mixture was passed through a homogenizer twice at a pressure of 300 kgf / cm ² to emulsify and disperse.

Then, the emulsified / dispersed liquid was transferred into a separable flask equipped with a condenser, a nitrogen gas inlet and a stirrer, heated at 85 ° C. for 5 hours while stirring and mixing, and then cooled at 5 ° C. for 48 hours. Then, polymerization was carried out. next,
Sodium carbonate aqueous solution was added to the separable flask,
The colloidal silica core-silicone shell emulsion was neutralized to pH 7. 10 of these obtained emulsions
The nonvolatile content at 5 ° C for 3 hours is 30.5%, and
The polymerization rate of octamethylcyclotetrasiloxane is 99.
It was 3%.

Further, the particle size was analyzed by a laser particle size analysis system. As a result, the monodisperse particle size distribution having a peak near the average particle size of 84 nm of the colloidal silica as the material disappeared completely, and the peak around 150 nm. A new monodisperse particle size distribution with has appeared. Further, when observed with an electron microscope, only an image of silicone particles was confirmed, and an image of colloidal silica particles of the material was not observed at all.

From these, it was found that the non-volatile content of the colloidal silica core-silicone shell emulsion was a colloidal silica core-silicone shell.

On the other hand, a part of the colloidal silica core-silicone shell emulsion was poured into a large amount of acetone to precipitate a colloidal silica core-silicone shell, which was filtered and dried in a vacuum dryer at 50 ° C. for 12 hours. Thus, an aggregate of colloidal silica core-silicone shell body was obtained. When this aggregate is regarded as a graft polymer, its graft ratio and graft efficiency are 4 respectively.
It was 1.7%.

Examples 1-4, Comparative Examples 1-4 (liquid foundation) Colloidal silica core-silicone shell emulsion prepared above, decamethylcyclopentasiloxane, 2
Polydimethylsiloxane having a viscosity of 20 cSt at 5 ° C. and each component shown in Table 1 were mixed in the composition ratio (%) shown in the same table, and these were mixed by stirring to prepare a liquid foundation composition.

[0074]

[Table 1]

These foundation compositions were tested and evaluated according to the following evaluation methods and evaluation criteria.
The results are also shown in Table 1.

The “sensory evaluation” was actually used by 10 female panelists, and evaluated based on the following criteria for three items: “makeup mochi”, “fresh feeling”, and “spreading and spreading when applying”. I went. ⊚: Out of 10 people, 8 or more people evaluated it as good. ◯: Out of 10 people, 6 or more people evaluated it as good. Δ: Out of 10 people, 4 or more people evaluated it as good. X: Out of 10 people, only 3 or less were evaluated as good.

The "emulsion stability" was evaluated according to the following criteria. ⊚: No abnormality in appearance even if left at 50 ° C. for 6 weeks ○: No abnormality in appearance even after left at 50 ° C. for 4 weeks Δ: Part of the oil floated ×: Separation in 1 week at 50 ° C.

[0078]   Example 5 (liquid foundation) 1. Colloidal silica core-silicone shell emulsion 16.7 (wt% ) 2. Decamethylcyclopentasiloxane 10.0 3. Dimethylpolysiloxane (viscosity 20 cSt) 5.0 4. Methylphenyl polysiloxane (Note 1) 1.0 5. Stearic acid 1.5 6. Glycerin monostearate 0.5 7. Glycerin 2.0 8.1,3-butylene glycol 10.0 9. Triethanolamine 1.0 10. Titanium oxide 6.0 11. Talc 1.0 12. Inorganic color pigment Appropriate amount (0.1 or less ) 13. Paraben Suitable amount (0.1 or less ) 14. Fragrance Suitable amount (0.1 or less ) 15. Purified water Remaining amount (Note 1) TSF437 manufactured by GE Toshiba Silicone; viscosity 20 cSt (25 ° C. )

The respective components 1 to 15 are blended in the above composition ratio,
These were mixed by stirring to prepare a liquid foundation. The stability of this foundation composition was ⊚, and the sensory evaluation items “makeup lasting”, “fresh feeling”, and “spreading and spreading when applied” were all ⊚. The stability and sensory evaluation criteria are those of Examples 1 to 1.
According to 4. The evaluation criteria for stability and sensory evaluation in the following examples are also based on Examples 1 to 4.

[0080]   Example 6 (milky lotion) 1. Colloidal silica core-silicone shell emulsion 6.7 (wt% ) 2. Decamethylcyclopentasiloxane 25.0 3. Dimethyl polysiloxane (viscosity 20 cSt) 2.5 4. Propylene glycol 10.0 5. Sodium stearate 0.5 6. Stearyl alcohol 2.0 7. Preservative Suitable amount (0.1 or less) 8. Perfume suitable amount (0.1 or less) 9. Purified water Remaining amount

The components 1 to 9 were blended in the above composition ratio, and these were mixed by stirring to prepare an emulsion. The stability of this emulsion was ⊚, “makeup lasting”, “fresh feeling”, and “spreading and spreading when applying” were all ⊚.

[0082]   Example 7 (cream) 1. Colloidal silica core-silicone shell emulsion 6.7 (wt% ) 2. Silicone emulsion (Note 2) 22.2 3. Squalane 5.0 4. Polyoxyethylene sorbitan fatty acid ester 1.0 5. Behenyl alcohol 1.5 6. Propylene glycol 10.0 7. Vitamin E acetate 0.2 8. Preservative Suitable amount (0.1 or less) 9. Perfume suitable amount (0.1 or less) 10. Purified water Remaining amount (Note 2) Base oil composition: decamethylcyclopentasiloxane / polydimethylsiloxa (Viscosity 20 million cP) = 15/85, base oil viscosity: 6000 cP, average particle size : 5 μm, silicone content: 60%

The ingredients 1 to 9 were blended in the above composition ratio, and these were mixed by stirring to prepare a cream. The stability of this cream was ⊚, and the sensory evaluation items “makeup retention”, “fresh feeling”, and “spreading and spreading when applying” were all ⊚.

[0084]   Example 8 (sunscreen cream) 1. Colloidal silica core-silicone shell emulsion 16.7 (wt% ) 2. Decamethylcyclopentasiloxane 25.0 3. Cetostearyl alcohol 2.0 4. Olive oil 2.0 5. p-Dimethylaminobenzoic acid 2-ethylhexyl ester 4.0 6.2-Hydroxy-4-methoxybenzophenone 1.0 7. Ethanol 0.7 8. Polyoxyethylene hydrogenated castor oil 0.4 9. Propylene glycol 5.0 10. Titanium oxide 4.0 11. Paraben suitable amount (0.1 or less) 12. Perfume suitable amount (0.1 or less) 13. Purified water Remaining amount

The respective components 1 to 13 are blended in the above composition ratio,
These were mixed by stirring to prepare a sunscreen cream. The stability of this cream was ⊚, “makeup lasting”, “fresh feeling”, and “spreading and spreading when applying” were all ⊚.

[0086]

As is apparent from the above description, according to the present invention, the use of a colloidal silica core-silicone shell body and a polyorganosiloxane in combination has high adhesion to the skin and oil resistance. It is possible to obtain a cosmetic composition for skin or make-up, which has good properties, sweat resistance, water resistance, good makeup lasting, spreads well on the skin, and has a refreshing feeling of use.

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 4C083 AA122 AB171 AB172 AB242                       AB432 AC022 AC072 AC102                       AC122 AC242 AC422 AC432                       AC442 AC472 AC482 AC542                       AC552 AD151 AD152 AD161                       AD162 AD172 AD662 BB25                       CC11 CC12 DD22 DD23 DD31                       DD32 DD33 EE01 EE06 EE07                       EE11 EE17 FF01 FF05

Claims (5)

[Claims] 1. A core 9 of (A) (1) colloidal silica
0 to 10% by weight, and (2) average composition formula R ¹ _a SiO 2 _{(4-a) / 2} (wherein R ¹ is a substituted or unsubstituted identical or different 1
10 to 90% by weight of a polyorganosiloxane shell represented by a valent hydrocarbon group, a is a number of 1.80 to 2.20)
And a colloidal silica core-silicone shell body consisting of (B) and a polyorganosiloxane (B), and the content ratio of the colloidal silica core-silicone shell body (A) is 0.5 to 10% by weight. ) A cosmetic composition for skin / makeup, characterized in that the content of the polyorganosiloxane is 0.5 to 50% by weight. 2. The colloidal silica core-silicone shell body (A) is a silicone emulsion obtained by emulsion polymerization, and has an average particle size of 350 n.
The cosmetic composition for skin / makeup according to claim 1, wherein the cosmetic composition is m or less. 3. The cosmetic composition for skin / makeup according to claim 1, wherein the viscosity of the polyorganosiloxane (B) is 1 to 50,000,000 cP at 25 ° C. 4. The (B) polyorganosiloxane comprises:
The cosmetic composition for skin / makeup according to claim 1, wherein the cosmetic composition is dimethyl silicone and / or methylphenyl silicone. 5. The (B) polyorganosiloxane comprises:
The cosmetic composition for skin / makeup according to any one of claims 1 to 4, wherein the cosmetic composition is an oil-in-water type or a water-in-oil type silicone emulsion.