JP2006321725A - Emulsion-form skin preparation for external use - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an emulsion-form skin preparation for external use that contains an organomodified clay mineral and is excellent in serviceability and stability. <P>SOLUTION: The emulsion-form skin preparation for external use comprises (1) alginic acid and/or a salt thereof, (2) the organomodified clay mineral, and (3) glycerine in an amount of 0.5 to 1.5 times the mass of the whole amount of water contained. Preferably, the content of the alginic acid and/or the salt thereof is 0.01-0.5 mass%. The organomodified clay mineral is preferably montmorillonite modified with dimethyldistearylammonium chloride. Preferably, the glycerine content is 10-25 mass%. The emulsion-form is preferably a multiphase emulsion-form, and the multiphase emulsion-form is preferably an oil-in-water-in-oil emulsion-form. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a skin external preparation, and more particularly to a skin external preparation suitable for an emulsifier-type skin external preparation.

  In the emulsifier-type external preparation for skin, the inclusion of a highly concentrated polyhydric alcohol such as glycerin at a high concentration is due to the obstructive action caused by the oil and fat contained in the emulsified form and the angle caused by the polyhydric alcohol. Since both the moisturizing action of the layer can be obtained, it can be said that it is very functionally preferable. In particular, in the emulsifier form in which the outermost phase is an oil phase, such as a water-in-oil emulsifier form or an oil-in-water oil-in-water emulsifier form, the above-mentioned blocking effect is more remarkable, and the inclusion of a moisturizing polyhydric alcohol is more preferable. It can be said. However, increasing the content of the polyhydric alcohol tends to be a destabilizing factor of the emulsification system and tends to make it difficult to ensure stability. In order to ensure stability in such a form, it is conceivable to improve the strength of the interface with higher alcohols, etc., but such a technique also significantly increases the friction coefficient when spreading the external preparation for skin. In some cases, the usability was significantly impaired.

  On the other hand, such improvement in usability is not limited to the problem when containing a high concentration of moisturizing polyhydric alcohol, and the outermost phase such as the water-in-oil emulsifier form or the oil-in-water oil-in-water emulsifier form is the oil phase emulsifier form. Therefore, reducing the coefficient of friction at the time of spreading and improving the usability is a major issue, and organically modified clay minerals have been found as an interfacial stabilizer to replace higher alcohols. (For example, see Patent Document 1, Patent Document 2, Patent Document 3, Patent Document 4, and Patent Document 5) However, in such a system, an aqueous phase containing polyhydric alcohol and an organically modified clay mineral gel are formed. There is a need, but if the amount of polyhydric alcohol is too large, gel may not be formed and emulsification may not be possible, and it contains 0.6 to 1.5 times the mass of glycerin with respect to the total water content. In the current emulsification system, emulsification using an organically modified clay mineral has not been attempted.

  On the other hand, an emulsifier comprising 1) alginic acid and / or a salt thereof, 2) an organically modified clay mineral, and 3) glycerin having a mass of 0.5 to 1.5 times the total water content. No form of external preparation for skin is known, nor is it known that a stable emulsification system can be obtained with such a constitution.

Japanese Patent Laid-Open No. 2004-091422 JP 2003-026529 A Japanese Patent Laid-Open No. 2002-212028 JP-A-11-228346 JP 09-255562 A

  The present invention has been made under such circumstances, and an object of the present invention is to provide a skin external preparation excellent in usability and stability in an emulsifier type skin external preparation containing an organically modified clay mineral.

Under these circumstances, the present inventors have made extensive research efforts to find a skin external preparation having excellent usability and stability in an emulsifier-type skin external preparation containing an organically modified clay mineral. An external emulsifier type skin comprising alginic acid and / or a salt thereof, 2) an organically modified clay mineral, and 3) glycerin having a mass of 0.6 to 1.5 times the total water content. The inventors have found that the agent has such characteristics, and have completed the invention. That is, the present invention is as follows.
(1) An emulsifier comprising 1) alginic acid and / or a salt thereof, 2) an organically modified clay mineral, and 3) glycerin having a mass of 0.5 to 1.5 times the total water content. Topical skin preparation.
(2) The external preparation for skin according to (1), wherein the content of the alginic acid and / or salt thereof is 0.01 to 0.5% by mass.
(3) The skin external preparation according to (1) or (2), wherein the organically modified clay mineral is dimethyl distearyl ammonium chloride modified montmorillonite.
(4) The skin external preparation according to any one of (1) to (3), wherein a content of the glycerin is 10 to 25% by mass.
(5) The external preparation for skin according to any one of (1) to (4), wherein the emulsifier form is a multiphase emulsifier form.
(6) The skin external preparation according to (5), wherein the multiphase emulsifier form is an oil-in-water oil-in-water emulsifier form.

  ADVANTAGE OF THE INVENTION According to this invention, in the emulsifier type skin external preparation containing an organic modified clay mineral, the skin external preparation excellent in usability and stability can be provided.

(1) Alginic acid as an essential component of the external preparation for skin of the present invention The external preparation for skin of the present invention is in an emulsifier form and contains alginic acid and / or a salt thereof. Alginic acid and / or a salt thereof is widely used as a water-soluble thickening component in the fields of skin external preparations such as cosmetics and foods. There are several grades of these depending on the degree of thickening. Examples include ultra-low viscosity products, high-purity products, and high-viscosity products. As the salt, if it is usually known, it can be applied without particular limitation, for example, alkali metal salts such as sodium salt and potassium salt, alkaline earth metal salts such as calcium and magnesium, ammonium, etc. Preferred examples include organic amine salts such as salts, triethanolamine salts and triethylamine salts, and basic amino acid salts such as lysine salts and arginine salts. It is said that the viscosity at 1% by mass is about 100 to 200 cp for an ultra low viscosity product, about 300 to 700 cp for a high purity product, and about 900 to 1200 cp for a high viscosity product. Within this viscosity range, the skin external preparation of the present invention can be used without any particular limitation. In the external preparation for skin of the present invention, it can be said that it is acceptable without particular limitation as long as the viscosity at 1 atm and 20 ° C. of a 1% by mass aqueous solution is 10 to 1500 cp. Preferred viscosities are between 200 and 1000 cp under these conditions. In the external preparation for skin of the present invention, such alginic acid and / or a salt thereof may contain only one species or a combination of two or more species. The preferable content of alginic acid and / or a salt thereof in the external preparation for skin of the present invention is 0.01 to 1% by mass relative to the total amount of the external preparation for skin, and more preferably 0.8%. It is 05-0.5 mass%. In the external preparation for skin of the present invention, such alginic acid and / or a salt thereof has an action of maintaining the emulsifying ability of the organically modified clay mineral even in a form having a high content of polyhydric alcohol such as glycerin. When the content is lower than the above-mentioned content, there is a case where such an effect is not exhibited, and when it is too much, there is a case where the viscosity becomes too high and the usability is impaired.

(2) Organically modified clay mineral that is an essential component of the external preparation for skin of the present invention The external preparation for skin of the present invention is an emulsifier type and contains an organically modified clay mineral. Clay mineral, which is the base of organically modified clay minerals, is a generic name for colloidal hydrous aluminum silicate with a multi-layer structure that exists in nature or is obtained by processing natural products and retains metal atoms or ions between layers. The metal atoms or ions include Al, Fe (III), Mn (III), Cr (III), Mg, Fe (II), Ni, Zn, Li, Mn (II), K, Na, 1 / 2Ca or 1 / 2Mg can be preferably exemplified. Specific examples of mineral names include montmorillonite, saponite, and hectorite. The clay mineral is treated with a surfactant having a quaternary amino group and a long-chain alkyl group having 10 to 30 carbon atoms, preferably a cationic surfactant, and the surface of the clay mineral has a hydrocarbon as a surfactant. By processing so that a group exists, an organically modified clay mineral which is an essential component can be obtained. Specific examples of the cationic surfactant preferably used for such treatment include dodecyltrimethylammonium salt, myristyltrimethylammonium salt, cetyltrimethylammonium salt, stearyltrimethylammonium salt, alkyltrimethylammonium salt, Behenyltrimethylammonium salt, myristyldimethylethylammonium salt, cetyldimethylethylammonium salt, stearyldimethylethylammonium salt, alkyldimethylethylammonium salt, behenyldimethylethylammonium salt, myristyldiethylmethylammonium salt, cetyldiethyl Methyl ammonium salt, stearyl diethyl methyl ammonium salt, alkyl diethyl methyl ammonium salt, behenyl di Tilmethylammonium salt, benzyldimethylmyristylammonium salt, benzyldimethylcetylammonium salt, benzyldimethylstearylammonium salt, benzyldimethylbehenylammonium salt, benzylmethylethylcetylammonium salt, benzylmethylethylstearylammonium salt, Preferred examples include salts of dimethyl distearyl ammonium, dibehenyl dihydroxyethyl ammonium, and the like. Preferred examples of the salt include mineral salts such as chloride, bromide, and sulfate, with chloride being particularly preferred. A particularly preferred cationic surfactant is a so-called “two-chain type” cationic surfactant in which two long-chain alkyl groups are attached to one nitrogen atom, and a salt of dimethyl distearyl ammonium is used. Particularly preferable examples are exemplified, and as the salt, chloride is preferably exemplified. The treatment is not particularly limited as long as the cationic surfactant can be uniformly fixed on the surface of the clay mineral. For example, the clay mineral as a base is dispersed in an aqueous carrier, and the cationic mineral is dispersed therein. It is preferable to add an aqueous carrier solution of a surfactant and then remove the aqueous carrier by means such as concentration under reduced pressure. The mass ratio of the clay mineral and the cationic surfactant at this time is preferably 99: 1 to 70:30, and particularly preferably 95: 5 to 80:20. In place of the cationic surfactant, an organic group can be introduced using a nonionic surfactant, an amphoteric surfactant, or an anionic surfactant. Of these, essential components are particularly preferred, but organically modified with a cationic surfactant. Such organically modified clay minerals already exist on the market, and such commercial products can be purchased and used. Preferable examples of commercially available products include Benton 38 (dimethyl distearyl ammonium chloride-treated montmorillonite: National Red). In the external preparation for skin of the present invention, such an organically modified clay mineral can contain only one species or a combination of two or more species. The preferable content of the organically modified clay mineral in the external preparation for skin of the present invention is 0.1 to 5% by mass in total, and more preferably 0.5 to 3% by mass. If the content of the organically modified clay mineral is too small, emulsification may be poor, and if the content is too large, the gel strength may be remarkable and the usability may be impaired.

(3) Inclusion of glycerin in the external preparation for skin of the present invention The external preparation for skin of the present invention is in an emulsifier form, more preferably 0.5 to 1.5 times the mass of the total water content. It contains 0.6 to 1.2 times the amount of glycerin. As mentioned above, in order to improve the usability by providing the multi-phase emulsifier type blockage and the polyhydric alcohol moisture retention (moisture retention), the content of the polyhydric alcohol is limited to the limit of the aqueous phase. It is preferable to increase. This is the value described above. By taking such a form, it is possible to add moisturizing property with a polyhydric alcohol in the multiphase emulsifier form having excellent occlusive properties without impairing the usability. The content of glycerin in the external preparation for skin is preferably 15 to 35% by mass, more preferably 17 to 25% by mass.

(4) External preparation for skin of the present invention The external preparation for skin of the present invention is characterized in that it has the above-mentioned essential constituents and should be administered for external use on the skin. In the external preparation for skin of the present invention, in addition to the above-mentioned components, optional components usually used in external preparations for skin can be contained within a range not impairing the effects of the present invention. Such optional ingredients include, for example, macadamia nut oil, avocado oil, corn oil, olive oil, rapeseed oil, sesame oil, castor oil, safflower oil, cottonseed oil, jojoba oil, coconut oil, palm oil, liquid lanolin, hydrogenated coconut oil Oil, wax, oil such as beeswax, canola wax, carnauba wax, ibotarou, lanolin, reduced lanolin, hard lanolin, jojoba wax, liquid paraffin, squalane, pristane, ozokerite, paraffin, ceresin, petrolatum , Hydrocarbons such as microcrystalline wax; higher fatty acids such as oleic acid, isostearic acid, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, undecylenic acid; cetyl alcohol, stearyl alcohol, isostearyl Higher alcohols such as alcohol, behenyl alcohol, octyldodecanol, myristyl alcohol, cetostearyl alcohol; cetyl isooctanoate, isopropyl myristate, hexyldecyl isostearate, diisopropyl adipate, di-2-ethylhexyl sebacate, cetyl lactate, malic acid Diisostearyl, di-2-ethylhexanoic acid ethylene glycol, dicaprate neopentyl glycol, di-2-heptylundecanoic acid glycerin, tri-2-ethylhexanoic acid glycerin, tri-2-ethylhexanoic acid trimethylolpropane, tri Synthetic ester oils such as trimethylolpropane isostearate and pentane erythritol tetra-2-ethylhexanoate; dimethylpolysiloxane, methylphenylpoly Linear polysiloxanes such as oxane and diphenylpolysiloxane; cyclic polysiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexanesiloxane; amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, Oil agents such as silicone oils such as modified polysiloxanes such as fluorine-modified polysiloxanes; Anionic surfactants such as fatty acid soap (sodium laurate, sodium palmitate, etc.), potassium lauryl sulfate, triethanolamine ether of alkyl sulfates; Cationic surfactants such as stearyltrimethylammonium, benzalkonium chloride, laurylamine oxide; imidazoline-based amphoteric surfactants (2-cocoyl-2-imida Zolinium hydroxide-1-carboxyethyloxy disodium salt, etc.), betaine surfactants (alkyl betaine, amide betaine, sulfobetaine, etc.), and amphoteric surfactants such as acylmethyltaurine; sorbitan fatty acid esters (sorbitan) Monostearate, sorbitan sesquioleate, etc.), glycerin fatty acids (eg, glyceryl monostearate), propylene glycol fatty acid esters (eg, propylene glycol monostearate), hardened castor oil derivatives, glycerin alkyl ethers, POE sorbitan fatty acid esters (POE sorbitan monooleate, polyoxyethylene sorbitan monostearate, etc.), POE sorbite fatty acid esters (POE-sorbitol monolaurate, etc.), POE glycerin fatty acid ester Tells (POE-glycerol monoisostearate, etc.), POE fatty acid esters (polyethylene glycol monooleate, POE distearate, etc.), POE alkyl ethers (POE2-octyldodecyl ether, etc.), POE alkylphenyl ethers (POE nonylphenyl) Ethers, etc.), Pluronic types, POE / POP alkyl ethers (POE / POP2-decyltetradecyl ether, etc.), Tetronics, POE castor oil / hardened castor oil derivatives (POE castor oil, POE hardened castor oil, etc.), Nonionic surfactants such as sucrose fatty acid ester and alkyl glucoside; polyethylene glycol, glycerin, 1,3-butylene glycol, erythritol, sorbitol, xylitol, maltitol, propylene Polyhydric alcohols such as recall, dipropylene glycol, diglycerin, isoprene glycol, 1,2-pentanediol, 2,4-hexanediol, 1,2-hexanediol, 1,2-octanediol; sodium pyrrolidonecarboxylate Moisturizing components such as lactic acid and sodium lactate; powders such as mica, talc, kaolin, synthetic mica, calcium carbonate, magnesium carbonate, anhydrous silicic acid (silica), aluminum oxide, barium sulfate, etc. whose surface may be treated Body, the surface may be treated, inorganic pigments such as bengara, yellow iron oxide, black iron oxide, cobalt oxide, ultramarine, bitumen, titanium oxide, zinc oxide; the surface may be treated, mica Pearl agents such as titanium, fish phosphorus foil, bismuth oxychloride; red 202 which may be raked, red Color 228, Red 226, Yellow 4, Blue 404, Yellow 5, Red 505, Red 230, Red 223, Orange 201, Red 213, Yellow 204, Yellow 203, Blue 1 No., green 201, purple 201, red 204, etc .; organic powders such as polyethylene powder, polymethyl methacrylate, nylon powder, organopolysiloxane elastomer, methylsiloxane network polymer; paraaminobenzoic acid UV absorbers; anthranilic acid UV absorbers; salicylic acid UV absorbers; cinnamic acid UV absorbers; benzophenone UV absorbers; sugar UV absorbers; 2- (2'-hydroxy-5'- UV absorbers such as t-octylphenyl) benzotriazole, 4-methoxy-4′-t-butyldibenzoylmethane; ethanol, Lower alcohols such as isopropanol; vitamin B or its derivatives, vitamin B6 hydrochloride, vitamin B6 tripalmitate, vitamin B6 dioctanoate, vitamin B2 or a derivative thereof, vitamin B such as vitamin B12, vitamin B15 or a derivative thereof; α- Vitamins such as tocopherol, β-tocopherol, γ-tocopherol, vitamin E acetate, vitamin D, vitamin D, vitamin H, pantothenic acid, panthetin, pyrroloquinoline quinone, etc .; butylparaben, propylparaben, ethylparaben, methylparaben Preferred examples include parabens such as undecylenic acid monoglyceride and phenoxyethanol.

  Among these components, butylparaben is preferably not contained since there is a case where irritation is expressed in the emulsion system in which the outermost phase is an oil phase, and a form containing no other parabens is more preferred. It is preferable to retain antiseptic power by containing antibacterial components such as undecylenic acid monoglyceride and phenoxyethanol instead of parabens which are such preservatives. These components can contain only 1 type, and can also contain it in combination of 2 or more type. The preferred content of such components is 0.1 to 5% by mass in total. A particularly preferred form is a form containing 0.5 to 4% by mass of undecylenic acid monoglyceride and 0.01 to 1% by mass of phenoxyethanol.

  Furthermore, it is preferable to contain a spherical powder, particularly a methylsiloxane network polymer, in order to improve the feeling of use. The preferable content of such a component is 0.1 to 5% by mass.

  The skin external preparation of this invention can be manufactured by processing the said essential component and arbitrary component in accordance with a conventional method. The skin external preparation of the present invention thus obtained is excellent in usability and stability in an emulsifier-type skin external preparation containing an organically modified clay mineral. Furthermore, it has excellent occlusive properties and skin moisturizing properties.

  The skin external preparation of the present invention is applied without particular limitation as long as it is externally applied to the skin, for example, cosmetics (including quasi-drugs), skin external medicines, and general-purpose items for external use. It is particularly preferable to be applied to cosmetics including quasi drugs. This is because the characteristics of the external preparation for skin of the present invention, which has excellent usability and stability, and has both excellent occlusive properties and skin moisturizing properties, can be utilized.

  Hereinafter, the present invention will be described in more detail with reference to examples, but it is needless to say that the present invention is not limited to such examples.

  According to the formulation shown below, Cosmetic 1 which is an external preparation for skin of the present invention was prepared. That is, the components of A, B, C, D, E and F were heated at 80 ° C., A was gradually added to B with stirring, and C was further added to prepare an intermediate emulsion. F was added to the mixture to make it uniform, and this was added to the mixture under stirring to form a gel. An intermediate emulsion was gradually added to the gel with stirring, and the mixture was cooled with stirring to obtain a cosmetic 1 in the form of an oil-in-water oil emulsifier. Production of Comparative Example 1 in which “Benton 38” of Cosmetic 1 was replaced with montmorillonite and Comparative Example 2 in which sodium alginate was replaced with carboxyvinyl polymer was attempted with the same procedure, but both were not emulsifiable. Comparative Example 3 in which 20% by mass of glycerin in cosmetic 1 was replaced with water was produced by the same procedure.

Ibehenic acid 0.4% by mass
Stearic acid 0.15% by mass
Glycerin 4.5% by mass
10% aqueous potassium hydroxide 0.45 mass%
Water 2.9% by mass
Robehenyl alcohol 0.5 mass%
Stearyl alcohol 0.3% by mass
Squalane 4.5 mass%
Phenoxyethanol 0.15% by mass
1,3-butanediol 4.5% by mass
Water 21.65
D "Benton 38" 2.5 mass%
Sucrose monostearate 4% by mass
Squalane 3.5 wt%
Cyclomethicone 23% by mass
Lanolin 1% by mass
Hoglycerin 20% by mass
Methylsiloxane network polymer 2% by mass
Phenoxyethanol 0.15% by mass
Undecylenic acid monoglyceride 2% by mass
Sodium helginate (high purity product) 0.2% by mass
1.65% by weight of water
* Amount of water: 26.2% by mass, amount of glycerin: 24.5% by mass

<Test Example 1>
Using the cosmetic 1 and the comparative example 1, a 2 cm × 4 cm portion of the inner arm of the panel was processed (amount of sample used: 20 mg each), and after 20 minutes, “Skikon 200” (manufactured by EB Corp.) ) Was used to measure skin moisture. The results are shown in Table 1. From this, it can be seen that in the external preparation for skin of the present invention, the moisture content of the skin is remarkably increased by the occlusion effect and the moisturizing effect by glycerin.

  In the same manner as in Example 1, cosmetic 2 as an external preparation for skin of the present invention was prepared according to the following formulation. The skin moisture content was also measured in the same manner. As a result, the treatment site of Cosmetic 2 was 58 and the non-treatment site was 36. It can be seen that a similar effect exists.

Ibehenic acid 0.4% by mass
Stearic acid 0.15% by mass
Glycerin 4.5% by mass
10% aqueous potassium hydroxide 0.45 mass%
Water 2.9% by mass
Robehenyl alcohol 0.5 mass%
Stearyl alcohol 0.3% by mass
Squalane 4.5 mass%
Phenoxyethanol 0.15% by mass
1,3-butanediol 4.5% by mass
Water 21.65
D "Benton 38" 2.5 mass%
Sucrose monostearate 4% by mass
Squalane 3.5 wt%
Cyclomethicone 23% by mass
Lanolin 1% by mass
Hoglycerin 20% by mass
Methylsiloxane network polymer 2% by mass
Phenoxyethanol 0.15% by mass
Undecylenic acid monoglyceride 2% by mass
Sodium helginate (ultra-low viscosity product) 0.2% by mass
1.65% by weight of water
* Amount of water: 26.2% by mass, amount of glycerin: 24.5% by mass

  In the same manner as in Example 1, cosmetic 3 as an external preparation for skin of the present invention was prepared according to the following formulation. The skin moisture content was also measured in the same manner. As a result, the treatment site of Cosmetic 3 was 51 and the non-treatment site was 31. It can be seen that a similar effect exists. It can be seen that the amount of glycerin is preferably 0.5 to 1.5 times the mass of the water content, and more preferably 0.6 to 1.2 times.

Ibehenic acid 0.4% by mass
Stearic acid 0.15% by mass
Glycerin 4.5% by mass
10% aqueous potassium hydroxide 0.45 mass%
Water 2.9% by mass
Robehenyl alcohol 0.5 mass%
Stearyl alcohol 0.3% by mass
Squalane 4.5 mass%
Phenoxyethanol 0.15% by mass
1,3-butanediol 4.5% by mass
Water 21.65
D "Benton 38" 2.5 mass%
Sucrose monostearate 4% by mass
Squalane 3.5 wt%
Cyclomethicone 23% by mass
Lanolin 1% by mass
Hoglycerin 15% by mass
Methylsiloxane network polymer 2% by mass
Phenoxyethanol 0.15% by mass
Undecylenic acid monoglyceride 2% by mass
Sodium helginate (high purity product) 0.2% by mass
6.65% by mass of water
* Amount of water: 31.2% by mass, amount of glycerin: 19.5% by mass

<Reference Example 1>
100 g of montmorillonite was dispersed in 1 l of water, 20 g of stearyltrimethylammonium chloride dissolved in 500 ml of water was added thereto, and lyophilized to obtain organically modified montmorillonite 1.

  In the same manner as in Example 1, cosmetic 4 as an external preparation for skin of the present invention was prepared according to the following formulation. The skin moisture content was also measured in the same manner. As a result, the treatment site of cosmetic 4 was 53 and the non-treatment site was 38. It can be seen that a similar effect exists.

Ibehenic acid 0.4% by mass
Stearic acid 0.15% by mass
Glycerin 4.5% by mass
10% aqueous potassium hydroxide 0.45 mass%
Water 2.9% by mass
Robehenyl alcohol 0.5 mass%
Stearyl alcohol 0.3% by mass
Squalane 4.5 mass%
Phenoxyethanol 0.15% by mass
1,3-butanediol 4.5% by mass
Water 21.65
Organically modified montmorillonite 1 2.5% by mass
Sucrose monostearate 4% by mass
Squalane 3.5 wt%
Cyclomethicone 23% by mass
Lanolin 1% by mass
Hoglycerin 20% by mass
Methylsiloxane network polymer 2% by mass
Phenoxyethanol 0.15% by mass
Undecylenic acid monoglyceride 2% by mass
Sodium helginate (high purity product) 0.2% by mass
1.65% by weight of water
* Amount of water: 26.2% by mass, amount of glycerin: 24.5% by mass

<Reference Example 2>
100 g of saponite was dispersed in 1 liter of water, and 20 g of dimethyl distearyl ammonium chloride dissolved in 500 ml of water was added thereto and freeze-dried to obtain organically modified saponite 1.

  In the same manner as in Example 1, cosmetic 5 as an external preparation for skin of the present invention was prepared according to the following formulation. The skin moisture content was also measured in the same manner. As a result, the treatment site of cosmetic 5 was 59 and the non-treatment site was 41. It can be seen that a similar effect exists.

Ibehenic acid 0.4% by mass
Stearic acid 0.15% by mass
Glycerin 4.5% by mass
10% aqueous potassium hydroxide 0.45 mass%
Water 2.9% by mass
Robehenyl alcohol 0.5 mass%
Stearyl alcohol 0.3% by mass
Squalane 4.5 mass%
Phenoxyethanol 0.15% by mass
1,3-butanediol 4.5% by mass
Water 21.65
Organically modified saponite 1 2.5% by mass
Sucrose monostearate 4% by mass
Squalane 3.5 wt%
Cyclomethicone 23% by mass
Lanolin 1% by mass
Hoglycerin 20% by mass
Methylsiloxane network polymer 2% by mass
Phenoxyethanol 0.15% by mass
Undecylenic acid monoglyceride 2% by mass
Sodium helginate (high purity product) 0.2% by mass
1.65% by weight of water
* Amount of water: 26.2% by mass, amount of glycerin: 24.5% by mass

<Reference Example 3>
100 g of hectorite was dispersed in 1 l of water, 20 g of dimethyl distearyl ammonium chloride dissolved in 500 ml of water was added thereto, and lyophilized to obtain organically modified hectorite 1.

  In the same manner as in Example 1, cosmetic 6 as a skin external preparation of the present invention was prepared according to the following formulation. The skin moisture content was also measured in the same manner. As a result, the treatment site of cosmetic 6 was 55 and the non-treatment site was 38. It can be seen that a similar effect exists.

Ibehenic acid 0.4% by mass
Stearic acid 0.15% by mass
Glycerin 4.5% by mass
10% aqueous potassium hydroxide 0.45 mass%
Water 2.9% by mass
Robehenyl alcohol 0.5 mass%
Stearyl alcohol 0.3% by mass
Squalane 4.5 mass%
Phenoxyethanol 0.15% by mass
1,3-butanediol 4.5% by mass
Water 21.65
Organically modified hectorite 1 2.5% by mass
Sucrose monostearate 4% by mass
Squalane 3.5 wt%
Cyclomethicone 23% by mass
Lanolin 1% by mass
Hoglycerin 20% by mass
Methylsiloxane network polymer 2% by mass
Phenoxyethanol 0.15% by mass
Undecylenic acid monoglyceride 2% by mass
Sodium helginate (high purity product) 0.2% by mass
1.65% by weight of water
* Amount of water: 26.2% by mass, amount of glycerin: 24.5% by mass

  The present invention can be applied to cosmetics.

Claims (6)

An emulsifier-type skin comprising 1) alginic acid and / or a salt thereof, 2) an organically modified clay mineral, and 3) glycerin having a mass of 0.5 to 1.5 times the total water content. Topical agent. The skin external preparation according to claim 1, wherein the content of the alginic acid and / or salt thereof is 0.01 to 0.5 mass%. The skin external preparation according to claim 1 or 2, wherein the organically modified clay mineral is dimethyl distearyl ammonium chloride modified montmorillonite. The skin external preparation according to any one of claims 1 to 3, wherein the glycerin content is 10 to 25% by mass. The external preparation for skin according to any one of claims 1 to 4, wherein the emulsifier form is a multiphase emulsifier form. The skin external preparation according to claim 5, wherein the multiphase emulsifier form is an oil-in-water oil-in-water emulsifier form.