JP5892720B2 - Skin preparation - Google Patents

Description

  [Technical Field] The present invention relates to an external preparation for skin, which has a fresh feeling of use but exhibits a moist feeling and a non-sticky feeling of use.

  In normal skin care, skin is made up in two stages by combining a lotion that replenishes moisture and moisturizing ingredients to rejuvenate and moisturizes the skin, and an emulsion that replenishes oils together with moisture and moisturizing ingredients to enhance the moisturizing and softening function of the skin. Caring for is done. A so-called all-in-one type skin external preparation is marketed to complete the two-stage care in one stage. However, all-in-one skin external preparations currently on the market have a fresh feeling of use and moisture, such as those lacking a moist feeling that emphasizes freshness and those lacking a freshness to emphasize moist feeling. Currently, there are no external skin preparations that have the effect of giving them.

  Glycerin has a high moisturizing effect and has been widely used for many years as a moisturizing agent in skin external preparations such as cosmetics. For example, Non-Patent Document 1 describes that the moisture retention function is increased by applying a 40% glycerin-containing moisturizing cream. Furthermore, glycerin has an excellent skin improvement effect in addition to a moisturizing effect. For example, Patent Document 1 describes a water-in-oil emulsified cosmetic for preventing rough skin containing 3 to 25% of glycerin. Yes. However, glycerin has a unique sticky feeling due to a characteristic characteristic of a polyol-based compound, and a feeling of use becomes worse when the amount is increased. In addition, in order to further enhance the moisturizing effect and skin improvement effect, if lotion and milky lotion containing a large amount of glycerin is used, the skin becomes sticky after skin care, and the foundation will thicken after makeup. There was a problem that makeup became worse, such as unevenness. On the other hand, reducing the total amount of glycerin added to the lotion and emulsion improves the feeling of stickiness and the thickness of the foundation, but the moisturizing effect is not sufficient, especially when dry skin causes rough skin. Can not bring skin care effect. Therefore, a skin care cosmetic kit including a first aqueous cosmetic containing 9 to 12% by mass of glycerin and a second aqueous cosmetic containing 1 to 4% by mass of glycerin has been proposed ( Patent Document 2).

Effectiveness of cosmetics Progress in evaluation technology and future prospects (Nanzan-do), pages 44-45 (issued in 2001)

JP 2002-356416 A JP 2010-59115 A

  The object of the present invention is to provide an external preparation for skin having both a fresh feeling of use and a moisturizing effect.

  The present invention includes components (A) to (E), that is, component (A) silicone elastomer powder, component (B) glycerin, component (C) acyl glutamate, component (D) hydrocarbon oil, and component (E) It is related with the skin external preparation containing a carboxy vinyl polymer and / or an alkyl modified carboxy vinyl polymer.

  The external preparation for skin of the present invention exhibits a feeling of use that is excellent in moisturizing effect and is not sticky while having a fresh feeling of use. Moreover, the external preparation for skin of the present invention is a single product that has the functions of three products of lotion, milky lotion, and cream.

  The external preparation for skin of the present invention comprises components (A) to (E), that is, component (A) silicone elastomer powder, component (B) glycerin, component (C) acyl glutamate, and component (D) hydrocarbon. Oil and component (E) carboxyvinyl polymer and / or alkyl-modified carboxyvinyl polymer. These components will be described individually.

  Examples of the component (A) silicone elastomer powder used in the present invention include (dimethicone / vinyl dimethicone / methicone) cross polymer, dimethicone / vinyl dimethicone) cross polymer, (diphenyl dimethicone / vinyl diphenyl dimethicone / silsesquioxane) cross polymer, and the like. One or two or more kinds of powders selected from elastic silicone resin spherical powders represented by

  Among these, examples of the (dimethicone / vinyl dimethicone / methicone) crosspolymer include KSP-100 manufactured by Shin-Etsu Chemical Co., Ltd. Examples of the (dimethicone / vinyl dimethicone) crosspolymer include Trefil E-506S manufactured by Toray Dow Corning. Examples of the (diphenyldimethicone / vinyldiphenyldimethicone / silsesquioxane) crosspolymer include KSP-300 manufactured by Shin-Etsu Chemical Co., Ltd.

  In this invention, the compounding quantity of component (A) silicone elastomer powder is 0.1-2 mass%. When the blending amount of the component (A) silicone elastomer powder is less than 0.1% by mass with respect to the external preparation for skin, the usability (spreading) effect may not be sufficiently exhibited.

  The compounding quantity to the skin external preparation of the component (B) glycerin used by this invention is 10-40 mass%. If it is less than 10% by mass, moist feeling may not be obtained. If it exceeds 40% by mass, stickiness may occur.

  Specific examples of the component (C) acyl glutamate used in the present invention include coconut oil fatty acid acyl glutamate potassium, coconut oil fatty acid acyl glutamate sodium, coconut oil fatty acid acyl glutamate triethanolamine, lauroyl glutamate potassium, lauroyl glutamate sodium, lauroyl glutamate Examples include triethanolamine, potassium myristoyl glutamate, sodium myristoyl glutamate, potassium stearoyl glutamate, sodium stearoyl glutamate, disodium stearoyl glutamate, sodium hard beef tallow fatty acid acyl glutamate, coconut oil fatty acid, hard beef tallow fatty acid acyl glutamate, and the like. These components may be used alone or in combination of two or more. As a preferred component (C), sodium lauroyl glutamate, sodium myristoyl glutamate, and sodium stearoyl glutamate are preferred, and sodium stearoyl glutamate is more preferred from the viewpoint of improving the emulsion stability during high temperature storage.

  In this invention, the compounding quantity of component (C) acyl glutamate is 0.1-5.0 mass%, Preferably it is 0.1-1 mass%. If the blending amount is less than 0.1% by mass, the emulsion stability may not be maintained. Even if it exceeds 5.0 mass%, further improvement in the emulsification effect may not be observed.

  The component (D) hydrocarbon oil used in the present invention includes those which are liquid at 25 ° C. and are synthetically or naturally derived. Such hydrocarbon oils include liquid lanolin, liquid paraffin, liquid isoparaffin, α-olefin oligomer, polybutene, hydrogenated polyolefin, squalane and the like. Among these, liquid paraffin, squalane and the like are preferable from the viewpoint of improving moist feeling.

  1 or more types can be used for the hydrocarbon oil of a component (D), and it is preferable to mix | blend 1-10 mass%. When the amount is less than 1% by mass, the moist feeling improvement effect may not be recognized. If it exceeds 10% by mass, it may cause stickiness.

  The component (E) carboxyvinyl polymer and / or the alkyl-modified carboxyvinyl polymer will be described.

  The carboxyvinyl polymer is mainly a polymer of acrylic acid, and specific examples thereof are not particularly limited and can be appropriately selected according to the purpose. For example, Carbopol 981 (manufactured by Lubrizol), Carbopol 980 (Manufactured by Lubrizol), Carbopol 941 (manufactured by Lubrizol), Carbopol 940 (manufactured by Lubrizol), Carbopol Ultrez 10 (manufactured by Lubrizol), Carbopol 2984 (manufactured by Lubrizol), Carbopol ETD2050 (Made by Lubrizol Co., Ltd.) and the like, and these can be used preferably.

  The alkyl-modified carboxyvinyl polymer is a copolymer of one or more monomers composed of acrylic acid, methacrylic acid or simple esters thereof and an alkyl acrylate. INCI name: Acrylates / C10-30 Alkyl Acrylate Crosspolymer [(acrylic acid / acrylic acid (C10-30) alkyl) crosspolymer], etc., and commercially available products can be used. As commercially available products, specifically, `` Carbopol ETD 2020 Polymer '', `` Carbopol 1342 Polymer '', `` Carbopol 1382 Polymer '', `` Carbopol Ultrez 20 Polymer '', `` Carbopol Ultrez 21 Polymer '', `` Pemulen TR-1 '', “Pemulen TR-2” (all of which are manufactured by Noveon) and the like can be used.

  1 type (s) or 2 or more types can be used for a carboxy vinyl polymer and / or an alkyl modified carboxy vinyl polymer. The carboxyvinyl polymer and / or the alkyl-modified carboxyvinyl polymer is usually used after neutralization with a basic substance. Examples of the basic substance to be used include alkanolamines such as triethanolamine and monoethanolamine, inorganic bases such as ammonia, sodium hydroxide and potassium hydroxide, and basic amino acids such as arginine. Moreover, the addition amount of the basic substance is an amount sufficient to neutralize the carboxyvinyl polymer and / or the alkyl-modified carboxyvinyl polymer, and may be appropriately blended depending on the type and amount of use of these components.

  The compounding quantity of a component (E) is 0.1-1 mass%. If the amount is less than 0.1% by mass, a sufficient thickening effect cannot be obtained.

  The skin external preparation of the present invention comprises an oil phase containing component (D) as an essential component, an aqueous phase containing components (B), component (E) and water as essential components, and component (C) as an essential component. It is an oil-in-water emulsion composition obtained by emulsifying using a surfactant.

  In addition to the above-mentioned essential components, the external preparation for skin of the present invention is usually mixed with pharmaceuticals, quasi-drugs, and skin cosmetics as necessary, aqueous components, oily components, humectants, pigments, An emulsifier, a solubilizer, an ultraviolet absorber, a thickener, a drug, a fragrance, a resin, a fungicide and an antifungal agent, alcohols, and the like can be appropriately blended.

  Further, the features of the present invention will be described in detail by way of examples.

  A skin external preparation was prepared by a conventional method with the formulation shown in Table 1, and the feeling of use was evaluated. As a result, Comparative Example 1 in which a carboxyvinyl polymer that is a thickener and a water-soluble polymer was not blended had poor skin familiarity and poor emulsion stability. Comparative Example 2 in which sodium emulsifier N-stearoyl-L-glutamate was replaced with sucrose fatty acid ester, which is also an emulsifier, had poor emulsification stability and was not of a quality that could withstand commercial launch. Comparative Example 3 in which glycerin was replaced with 1,3-butylene glycol had a feeling of use lacking moist feeling. In Comparative Example 4 in which the silicone elastomer powder (dimethicone / vinyl dimethicone / methicone) crosspolymer was replaced with purified water, a refreshing feeling was not felt, and the feeling of stickiness remained. The comparative example 5 which replaced squalane which is hydrocarbon oil with cetyl 2-ethylhexanoate which is ester oil was the feeling of use lacking in a moist feeling. In contrast to these comparative examples, Example 1 of the present invention was an excellent skin external preparation having no stickiness, good skin familiarity, both moist and refreshing feeling, and good emulsification stability. Furthermore, it was the feeling of use which had all the functions of lotion, a milky lotion, and cream only by using Example 1 single-piece | unit.

[Example 2] External preparation for skin
(1) Purified water 58.57 (mass%)
(2) Glycerin 20.00
(3) Carboxyvinyl polymer 0.40
(4) Sodium polyacrylate 0.03
(5) Sodium N-stearoyl-L-glutamate 0.50
(6) Decamethylcyclopentasiloxane 5.00
(7) (Dimethicone / Vinyl Dimethicone / Methicone) Crosspolymer 0.50
(8) Cetyl alcohol 2.00
(9) Self-emulsifying glyceryl monostearate 1.00
(10) Squalane 8.00
(11) L-arginine (10% by mass aqueous solution) 4.00
Manufacturing method
The water phase components (1) to (5) and the oil phase components (6) to (10) are each heated, mixed and homogenized at 75 ° C., then added to the water phase and emulsified and cooled. . Add (11) at 45 ° C. and mix.

  The skin external preparation obtained in Example 2 was an excellent skin external preparation having no stickiness, good skin familiarity, both moist and refreshing feeling, and good emulsification stability. Furthermore, just by using Example 2 as a single item, it was a feeling of use that had all functions of lotion, emulsion and cream.

Claims (1)

Component (A) to Component (E), that is, Component (A) silicone elastomer powder,
10-40 mass% of component (B) glycerin,
Component (C) acyl glutamate;
Component (D) hydrocarbon oil;
A skin external preparation containing component (E) carboxyvinyl polymer and / or alkyl-modified carboxyvinyl polymer.