Topical skin preparation for imparting firmness

Abstract

The present invention aims to provide an external skin preparation that can impart a firming feeling to the applied skin and has a smooth feel when used. The external skin preparation that imparts a firming feeling of the present invention is characterized by containing (a) 2.5 to 10 mass % of an oil-soluble coating agent and (b) 0.5 to 10 mass % of a water-swellable clay mineral. [Selection diagram] None

Description

Technical Field

[0001] The present invention relates to an external preparation for skin that imparts a firm feeling to the applied skin and has good usability.

Background Art

[0002] The firmness of the skin is maintained by collagen fibers and elastin fibers (elastic fibers) in the dermis under the epidermis. However, when the epidermis is chronically dry or the elasticity of the dermis decreases, unevenness occurs on the epidermis, appearing as wrinkles and sagging. In the cosmetic field, by smoothing the unevenness of the skin or making the unevenness less visually noticeable, the makeup condition is improved and the appearance is enhanced.

[0003] For example, Patent Document 1 proposes an external preparation for skin for correcting unevenness containing a specific volatile oil, wax, and a silicone-based film-forming agent. By blending a large amount of wax and volatile oil, the softness of the base and the usability are improved, and the unevenness is made less visually noticeable. However, such a cosmetic only improves the appearance and does not give a firm feeling itself.

[0004] Also, Patent Document 2 proposes a skin care cosmetic that forms a film on the skin to produce a firm feeling. In such a cosmetic, a film-forming agent is often blended. However, when a large amount of the film-forming agent is contained, while it has excellent adhesion to the skin, problems such as a decrease in the followability to skin movement and the fragility of the film occur. Regarding solving this problem and bringing about a makeup effect together with a firm feeling and further making the effect last for a long time, no consideration has been made at all.

[0005] There is a demand for an external preparation that can bring about a makeup effect while producing a sufficient firm feeling and has further improved usability.

Prior Art Documents

Patent Documents

[0006] Patent Document 1 Japanese Patent Application Laid-Open No. 2010-229094 Patent Document 2 Japanese Patent Application Laid-Open No. 2015-193542 Disclosure of the Invention Problems to be Solved by the Invention

[0007] An object of the present invention is to provide a topical skin preparation that can impart a firm feeling to the applied skin and has a smooth feel in use. Means for Solving the Problems

[0008] As a result of intensive studies to solve the above problems, the inventors have found that by combining and blending an oil-soluble film-forming agent and a water-swellable clay mineral, a firm feeling is imparted to the applied surface immediately after application and it has a smooth feel in use, and thus the present invention has been completed.

[0009] That is, the present invention provides (a) 2.5 to 10% by mass of an oil-soluble film-forming agent (b) 0.5 to 10% by mass of a water-swellable clay mineral and provides a topical skin preparation for imparting a firm feeling. Advantages of the Invention

[0010] By configuring the present invention as described above, a topical preparation that can impart a firm feeling to the applied skin can be obtained. Since this firm feeling can be felt immediately after application, the user can obtain an actual effect such that fine wrinkles are stretched immediately after use. Further, the topical preparation according to the present invention is not sticky and can be smoothly spread, and has an excellent feel in use. Modes for Carrying Out the Invention

[0011] The topical preparation of the present invention is characterized by containing (a) an oil-soluble film-forming agent and (b) a water-swellable clay mineral. Hereinafter, each component constituting the topical preparation of the present invention will be described in detail.

[0012] <(a) Oil-soluble film-forming agent> The (a) oil-soluble film-forming agent formulated in the external preparation according to the present invention (hereinafter sometimes simply referred to as the “(a) component”) is one that is usually used as a film-forming agent in cosmetics and is an oil-soluble one. Although not limited, examples include trimethylsiloxysilicic acid, siliconeized pullulan, (acrylates / dimethicone) copolymer, sesquisiloxane-based polymer, and the like.

[0013] As the (a) oil-soluble film-forming agent of the present invention, it is preferable to use an oil-soluble film-forming agent selected from trimethylsiloxysilicic acid and siliconeized pullulan. Among them, it is more preferable to use trimethylsiloxysilicic acid from the viewpoint of stability.

[0014] The trimethylsiloxysilicic acid that can be used in the present invention can be one produced by a known production method. Examples of commercially available products include X-21-5250 (50% decamethylcyclopentasiloxane solution, manufactured by Shin-Etsu Chemical Co., Ltd.), X-21-5250L (50% dimethicone solution, manufactured by Shin-Etsu Chemical Co., Ltd.), X-21-5616 (60% isododecane solution, manufactured by Shin-Etsu Chemical Co., Ltd.), X-21-5249 (50% decamethylcyclopentasiloxane solution, manufactured by Shin-Etsu Chemical Co., Ltd.), X-21-5249L (50% dimethicone solution, manufactured by Shin-Etsu Chemical Co., Ltd.), KF-7312 (50% decamethylcyclopentasiloxane solution, manufactured by Shin-Etsu Chemical Co., Ltd.), KF-7312K (60% dimethicone solution, manufactured by Shin-Etsu Chemical Co., Ltd.), KF-7312L (50% dimethicone solution, manufactured by Shin-Etsu Chemical Co., Ltd.), KF-7312T (60% methyltrimethicone solution, manufactured by Shin-Etsu Chemical Co., Ltd.), X-21-5595 (60% isododecane solution, manufactured by Shin-Etsu Chemical Co., Ltd.), KF-9021 (50% decamethylcyclopentasiloxane solution, manufactured by Shin-Etsu Chemical Co., Ltd.), KF-9021L (50% dimethicone solution, manufactured by Shin-Etsu Chemical Co., Ltd.), MQ-1600 Solid Resin (purity 100%, manufactured by Toray Dow Corning Co., Ltd.), Wacker-Belsil TMS803 (purity 100%, manufactured by Asahi Kasei Wacker Silicone Co., Ltd.), and the like.

[0015] The pullulan polysilicate that can be used in the present invention has a binding ratio of the silicone compound to the reactive functional group of pullulan that varies depending on its type. Usually, the average number of bonds (degree of substitution) of the silicone compound per sugar unit of the polysaccharide compound is preferably 0.5 to 3.0. In the present invention, the degree of substitution is converted from the Si content (% by mass) in the compound.

[0016] As the pullulan polysilicate, those produced by known production methods can be used (for example, Japanese Patent Application Laid-Open No. 10-29910). When formulating the pullulan polysilicate, dissolving it in a low molecular weight silicone oil or light isoparaffin for formulation can enhance the ease of formulation and the feeling of use.

[0017] The pullulan polysilicate that can be used in the present invention is preferably pullulan tri(trimethylsiloxy)silylpropylcarbamate. Examples of commercially available products include TSPL-30-ID (pullulan tri(trimethylsiloxy)silylpropylcarbamate, 30% isododecane solution, manufactured by Shin-Etsu Chemical Co., Ltd.) and TSPL-30-D5 (pullulan tri(trimethylsiloxy)silylpropylcarbamate, 30% decamethylcyclopentasiloxane solution, manufactured by Shin-Etsu Chemical Co., Ltd.).

[0018] As the oil-soluble film-forming agent of the present invention, one kind may be used alone, or two or more kinds may be used in combination. The blending amount of component (a) is 2.5 to 10% by mass, preferably 3.5 to 7.5% by mass in terms of actual content based on the total amount of the external preparation. If the blending amount of component (a) is less than 2.5% by mass, the firmness of the skin after application cannot be obtained, and if it exceeds 10% by mass, the elongation of the external preparation when applied to the skin becomes poor, which is not preferable.

[0019] <(b) Water-swellable clay mineral> The (b) water-swellable clay mineral (hereinafter sometimes simply referred to as the "(b) component") incorporated in the external preparation according to the present invention is a layered silicate mineral belonging to the smectite group. Generally, there are montmorillonite, paydellite, nontronite, laponite, hectorite, bentonite, etc., and these may be either natural or synthetic products.

[0020] Commercially available products include Kunipia, Smecton (both manufactured by Kunimine Industries Co., Ltd.), Laponite (manufactured by Laporte), synthetic sodium-type fluorophlogopite (Submicron E: manufactured by Daito Kasei Kogyo Co., Ltd.), Veegum Ultra Granules (manufactured by Vanderbilt), etc. Among these, Smecton and Laponite are particularly preferred.

[0021] The blending amount of the (b) component is 0.5 to 10% by mass, preferably 0.5 to 3% by mass, based on the total amount of the external preparation. If the blending amount is less than 0.5% by mass, the spreadability becomes poor, and if it exceeds 10% by mass, the stability becomes poor.

[0022] In addition to the above-mentioned blended components, the external preparation of the present invention may contain, if necessary, components generally used in external compositions, such as surfactants, lower alcohols (such as ethanol), humectants, oils, ultraviolet absorbers, ultraviolet scattering agents, powder components, thickeners, antioxidants, preservatives, bactericides, pH adjusters, vitamins, blood circulation promoters, whitening agents, skin activators, medicinal components, extracts from animals and plants, pigments, fragrances, etc., within a range that does not impair the effects of the present invention. However, it is not limited to these examples.

[0023] Among them, it is preferable to blend a humectant because it improves the flexibility of the film formed by the film-forming agent and makes the film less likely to break. Specific examples of the humectant include glycols such as propylene glycol, dipropylene glycol, 1,3-butylene glycol, 1,4-butylene glycol, diethylene glycol, triethylene glycol, and polyethylene glycol; glycerols such as glycerin, diglycerin, and polyglycerin; sugar alcohols such as sorbitol, mannitol, maltitol, xylitol, and erythritol; and saccharides such as fructose, glucose, galactose, maltose, lactose, and trehalose. When a humectant is blended in the external preparation of the present invention, the blending amount is 20% by mass or less, preferably 0.5 to 20% by mass, based on the total amount of the external preparation. If the blending amount is too small, the improvement in flexibility tends not to be obtained, and if it exceeds 20% by mass, the stiffness tends to be inferior.

[0024] In the external preparation of the present invention, various powder components usually blended in cosmetics may be blended. The powder components are blended for purposes such as improving usability, coloring, and light scattering. Examples of the powder components include organic pigments such as resorcin rubine BCA (Red No. 202), lake red C (Red No. 203), lake red CBA (Red No. 204), resorcin red (Red No. 205), resorcin red CA (Red No. 206), resorcin red BA (Red No. 207), resorcin red SR (Red No. 208), brilliant lake red R (Red No. 219), deep maroon (Red No. 220), toluidine red (Red No. 221), permanent red (Red No. 228), permanent orange (Orange No. 203), benzidine orange G (Orange No. 204), benzidine yellow G (Yellow No. 205), brilliant fast scarlet (Red No. 404), permanent red F5R (Red No. 405), hansa orange (Orange No. 401), hansa yellow (Yellow No. 401), phthalocyanine blue (Blue No. 404); ground products of clay minerals such as mica, sericite, talc, and kaolin; extender pigments such as anhydrous silicic acid, cerium oxide, silica, zinc stearate, synthetic talc, barium sulfate, bismuth oxychloride, alumina, and magnesium carbonate; coloring pigments such as iron oxide (red iron oxide), iron titanate, γ-iron oxide, yellow iron oxide, loess, black iron oxide, carbon, lower titanium oxide, manganese violet, cobalt violet, chromium oxide, chromium hydroxide, cobalt titanate, ultramarine, and dark ultramarine; white pigments such as titanium dioxide and zinc oxide; pearlescent pigments (pearl agents) such as titanium dioxide-coated mica (mica titanium) and iron oxide-coated mica titanium; lamé agents such as polyethylene terephthalate·aluminum·epoxy laminate powder and polyethylene terephthalate·aluminum laminate powder; and functional pigments such as iron-containing synthetic fluorophlogopite and fine particle composite powder. In the present invention, one or more of these powder components can be used, and the above powder components may be surface-treated. However, in order to maximize the stiffness provided by the external preparation of the present invention, when the powder component is blended, the blending amount is preferably 20% by mass or less based on the total amount of the external preparation. Further, when the external preparation of the present invention is prepared as a makeup cosmetic, the blending amount is preferably 5 to 20% by mass based on the total amount of the external preparation.

[0025] From the perspective of improving the smooth application feel of the external preparation of the present invention, it is preferable to incorporate a crosslinked siloxane elastomer. The crosslinked siloxane elastomer is a siloxane elastomer (silicone elastomer) obtained by three-dimensionally crosslinking polydimethylsiloxane, and includes emulsifiable and non-emulsifiable ones, and is not particularly limited. Examples of the emulsifiable crosslinked siloxane elastomer include polyoxyethylene methylpolysiloxane copolymer, alkyl group-containing polyoxyethylene methylpolysiloxane copolymer, polyglycerin-modified silicone copolymer, alkyl group-containing polyglycerin-modified silicone copolymer, etc. Examples of the non-emulsifiable crosslinked siloxane elastomer include methylpolysiloxane copolymer, methylphenylpolysiloxane copolymer, vinyldimethylcon / lauyldimethylcon copolymer, laurylpolydimethylsiloxyethyldimethylcon / bis-vinyldimethylcon copolymer, alkyl (C30-45) cetearyldimethylcon copolymer, cetearyldimethylcon copolymer, etc. As the crosslinked siloxane elastomer, those commercially available in the form of a swollen product swollen in various oil components such as silicone oil, mineral oil, triethylhexanoin, and squalane can be used.

[0026] Commercially available products of the crosslinked siloxane elastomer incorporated in the external preparation of the present invention include KSG-210 (((PEG-10 / 15) / dimethylcon) copolymer, a mixture of dimethylcon with 20-30% of the crosslinked product, manufactured by Shin-Etsu Chemical Co., Ltd.), KSG-360Z ((PEG-15 / lauylpolydimethylsiloxyethyldimethylcon) copolymer, a mixture of dimethylcon with 30-40% of the crosslinked product, manufactured by Shin-Etsu Chemical Co., Ltd.), KSG-710 ((dimethylcon / polyglycerin-3) copolymer, a mixture of dimethylcon with 20-30% of the crosslinked product, manufactured by Shin-Etsu Chemical Co., Ltd.), 9045 silicone elastomer blend (a mixture of dimethylcon copolymer and cyclopentasiloxane with 12.6% of the crosslinked product, manufactured by Toray Dow Corning Co., Ltd.).

[0027] When a crosslinked siloxane elastomer is blended in the external preparation of the present invention, the blending amount is 12% by mass or less in terms of solid content with respect to the total amount of the external preparation, and preferably 0.25 to 12% by mass. If the blending amount is too small, an improvement in the smooth feeling during application cannot be sufficiently obtained, and if it exceeds 12% by mass, the firmness tends to be inferior.

[0028] In the external preparation of the present invention, the proportion of the oil phase with respect to the total amount of the external preparation is preferably 60% by mass or more, and more preferably 60 to 75% by mass. By increasing the proportion of the oil phase, a more stable external preparation can be obtained. Here, the oil phase refers to a mixture of an oily component blended in the external preparation and a dispersion dispersed in the oily component.

[0029] The dosage form of the external preparation of the present invention includes an oily type, an oil-in-water type such as a cream, or an emulsion type such as a water-in-oil type, and any dosage form can exert the effect of imparting firmness to the applied skin. Among them, a more stable external preparation can be obtained by using an oil-in-water type emulsion type.

[0030] In addition, the external preparation of the present invention can be not only prepared as a skin care cosmetic but also used as a base for various cosmetics, and can be prepared as a sunscreen cosmetic, a makeup base, a foundation, a makeup cosmetic, etc. that impart firmness.

[0031] The external preparation according to the present invention does not cause powder spreading even when applied from above a foundation or the like, so it can be applied on top of made-up skin, or can be directly applied on non-made-up skin as part of daily skin care.

[0032] The external preparation of the present invention can be produced according to the conventionally used methods. Briefly, when the external preparation of the present invention is prepared as an oil-in-water type emulsified cosmetic, the oily component and the aqueous component are mixed while heating separately as needed, the aqueous phase is emulsified in the oil phase, and then the obtained emulsion is filled into a container and gradually cooled to produce it.

Examples

[0033] Examples are given below to describe the present invention in further detail, but the present invention is not limited thereto in any way. Unless otherwise specified, the blending amount is expressed as mass % with respect to the system in which the component is blended.

[0034] Prior to the examples, the evaluation method used in the present invention will be described. 1. Firmness It was evaluated by an actual use test by 10 professional panels. Specifically, the sample prepared on the face of the professional panel was applied with a finger, and the presence or absence of firmness in the applied skin was evaluated according to the following evaluation criteria. <Evaluation Criteria> A: 8 or more people answered that they felt firmness. B: 4 to 7 people answered that they felt firmness. C: 0 to 3 people answered that they felt firmness.

[0035] 2. Smoothness It was evaluated by an actual use test by 10 professional panels. Specifically, the sample prepared on the face of the professional panel was applied with a finger, and the smooth feeling during spreading was evaluated according to the following evaluation criteria. A: 8 or more people answered that they felt smoothness. B: 4 to 7 people answered that they felt smoothness. C: 0 to 3 people answered that they felt smoothness.

[0036] 3. Stability After preparation, the state of the preparation after being placed at 50 °C for 2 weeks was visually evaluated. A: No separation of oil and water was observed, and it maintained the state immediately after preparation. B: Slight separation of oil and water was observed. C: Separation of oil and water was obvious.

[0037] 4. Non-stickiness Evaluated by actual use tests with 10 expert panels. Specifically, the samples prepared on the faces of the expert panels were applied with fingers, and the presence or absence of stickiness on the applied surface was evaluated according to the following evaluation criteria, respectively. A: Eight or more people answered that they felt no stickiness. B: Four to seven people answered that they felt no stickiness. C: Zero to three people answered that they felt no stickiness.

[0038] (Examples, Comparative Examples) The compositions of the water-in-oil emulsified cosmetics shown in Table 1 and Table 2 below were prepared. Specifically, after dispersing the powder in the oily components mixed using a homomixer, the well-mixed aqueous components were added to obtain the compositions.

[0039] [Table 1] *1 Trimethylsiloxysilicic acid, actual content 50%, cyclopentasiloxane mixture *2 Pullulan tri(trimethylsiloxy)silylpropylcarbamate, actual content 30%, cyclopentasiloxane mixture *3 Dimethicone crosspolymer, actual content 12.5%, cyclopentasiloxane mixture *4 Laponite

[0040] For the cosmetics of Examples 1 and 2 using trimethylsiloxysilicic acid or pullulan tri(trimethylsiloxy)silylpropylcarbamate as the (a) oil-soluble film-forming agent and lithium / magnesium / sodium silicate (Laponite) as the (b) water-swellable clay mineral of the present invention, a firm feeling could be felt immediately after application, and a smooth touch was obtained.

[0041] On the other hand, no firmness was felt in the cosmetic without the component (a) (Comparative Example 1), and a smooth feel could not be obtained in the cosmetic without the component (b) (Comparative Example 2). Furthermore, no smooth feel was obtained in the cosmetic containing 25% by mass of trimethylsiloxysilicic acid as the component (a), i.e., 12.5% by mass on a solids basis (Comparative Example 3), and no firmness was obtained in the cosmetic containing only 4% by mass, i.e., 2% by mass on a solids basis (Comparative Example 4). Also, when the blending amount of the component (b) was more than 10% by mass, the stability of the cosmetic deteriorated (Comparative Example 5), and when it was less than 0.5% by mass, a smooth feel could not be obtained (Comparative Example 6).

[0042]

Table 2

[0043] Regarding the aqueous phase thickener, when the component (b) of the present invention was replaced with other aqueous phase thickeners (Comparative Examples 7 to 9), the firmness and smooth feel in use were inferior, and stickiness occurred. On the other hand, Examples 3 and 4 containing the components (a) and (b) of the present invention were excellent in terms of firmness, usability, and stability.

[0044] (Formulation Example) The formulation examples of the water-in-oil emulsion cosmetic of the present invention are given below. It goes without saying that the present invention is not limited in any way by these formulation examples and is defined by the claims.

[0045] Formulation Example 1. (Foundation) (Component Name) Blending Amount (%) Cyclomethicone Balance Diphenylsiloxyphenyltrimethicone 2 Trimethylsiloxysilicic acid *1 8 PEG-10 dimethicone 3 Dimethicone Crosspolymer 12.5% / Cyclopentasiloxane 10 Talc 5 Zinc Oxide *6 5 Wax 3 Water 15 1,3 - Butylene Glycol 5 Silicic Acid (Li / Mg / Na) *4 1 Hydrophobically Treated Fine Particle Titanium Oxide 4 Hydrophobically Treated Pigment Grade Titanium Oxide 6 Hydrophobically Treated Yellow Iron Oxide 0.4 Hydrophobically Treated Red Iron Oxide 0.1 Hydrophobically Treated Black Iron Oxide 0.02 (Vinyl Dimethicone / Methicone Silsesquioxane) Copolymer 2 Nylon - 12 2 Dimethylsilylated Silica 0.5 Sorbitan Sesquisisostearate 2 Ethylhexyl Methoxysilicate 5 *1 Trimethylsiloxysilicic Acid, 50% Solid Content, Cyclopentasiloxane Mixture *4 Laponite *6 Zinc White AZO - BS (Manufactured by Sho Do Chemical Industry Co., Ltd.)

[0046] Formulation Example 2. (Concealer) (Component Name) Blending Ratio (%) Cyclomethicone Remainder Diphenylsiloxyphenyltrimethicone 2 Trimethylsiloxysilicic Acid *1 8 PEG - 10 Dimethicone 3 (Dimethicone / Polyglycerin - 3) Copolymer / Dimethicone 15 Talc 5 Zinc Oxide *7 5 Wax 3 Water 15 1,3 - Butylene Glycol 5 Silicic Acid (Li / Mg / Na) *41 Hydrophobically Treated Pigment Grade Titanium Dioxide 12 Hydrophobically Treated Yellow Iron Oxide 0.4 Hydrophobically Treated Red Iron Oxide 0.1 Hydrophobically Treated Black Iron Oxide 0.02 Sorbitan Sesquioleate 2 *7 Candy Zinc 1000 (manufactured by Sakai Chemical Industry Co., Ltd.)

[0047] Formulation Example 3. (Eye Shadow) (Ingredient Name) Blending Ratio (%) Cyclomethicone Remainder Diphenylsiloxy Phenyl Trimethicone 2 Trimethylsiloxysilicate *1 8 PEG - 10 Dimethicone 3 (Dimethicone / (PEG - 10 / 15)) Crosspolymer / Dimethicone 10 Talc 5 Zinc Oxide *7 5 Wax 3 Water 15 1,3 - Butylene Glycol 5 Silicic Acid (Li / Mg / Na) *4 1 Silicone - Treated Red Iron Oxide - Coated Mica Titanium 5 Silicone - Treated Red Iron Oxide - Coated Mica Muscovite 5 Sorbitan Sesquioleate 2

[0048] Formulation Example 4. (Sunblock) (Ingredient Name) Blending Ratio (%) Cyclomethicone Remainder Diphenylsiloxy Phenyl Trimethicone 2 Trimethylsiloxysilicate *1 8 PEG - 10 Dimethicone 3 PEG - 9 Polydimethylsiloxyethyl Dimethicone 2 Dimethicone Crosspolymer 12.5% / Cyclopentasiloxane 10 Talc 5 Zinc Oxide *8 5 Wax 3 Water 15 1,3 - Butylene Glycol 5 Silicic Acid (Li / Mg / Na) *4 1 Hydrophobically Treated Fine Particle Titanium Oxide 10 Hydrophobically Treated Pigment Grade Titanium Oxide 3 Sorbitan Sesquisisostearate 2 Ethylhexyl Methoxysilicate 7.5 *8 WSX - MZ - 700 (manufactured by Teika Co., Ltd.)

[0049] Formulation Example 5. (SC Cream) (Ingredient Name) Blending Amount (%) Cyclomethicone Remainder Diphenylsiloxyphenyltrimethicone 2 Trimethylsiloxysilicic Acid *1 8 PEG - 10 Dimethicone 3 Dimethicone Crosspolymer 12.5% / Cyclopentasiloxane 10 (Dimethicone / (PEG - 10 / 15)) Crosspolymer / Dimethicone 15 Talc 5 Zinc Oxide *7 5 Wax 3 Water 15 1,3 - Butylene Glycol 5 Glycerin 3 Carboxymethylcellulose 0.1 Silicic Acid (Li / Mg / Na) *4 1

Claims

1. (a) 2.5 to 7.5% by mass of an oil-soluble film-forming agent (b) 0.5 to 3% by mass of a water-swellable clay mineral (d) 5 to 20% by mass of a powder component comprising: wherein the component (a) is one or more selected from trimethylsiloxysilicic acid and siliconeized pullulan; wherein the component (b) is one or more selected from magnesium aluminum silicate and laponite; A topical skin preparation for imparting a tightening feeling.

2. Furthermore, it contains (c) 0.5 to 20% by mass of a humectant, and the topical preparation according to Claim 1.

3. Furthermore, it contains (e) a crosslinked siloxane elastomer, and the topical preparation according to Claim 1 or 2.

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