W / O type emulsion composition

Abstract

To provide a W / O emulsion composition having a good feeling of use.SOLUTION: The present invention relates to a W / O emulsion composition containing component (A): one or two selected from lauryl PEG-9 polydimethylsiloxyethyl dimethicone and PEG-9 polydimethylsiloxyethyl dimethicone, component (B): poly (oxyethylene-oxypropylene) methylpolysiloxane copolymer, and component (C): inorganic salt.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a W / O type emulsion composition suitable for cosmetics and the like. [Background technology]

[0002] W / O type emulsion compositions (water-in-oil type emulsion compositions) have advantages such as a high occlusive effect and high moisturizing properties due to the presence of an oily component in the continuous phase. However, W / O type emulsion compositions have problems with the feel of use, such as stickiness upon application and poor spreadability. In addition, the incorporation of powders has also caused problems such as a powdery feeling on the skin after application, which impairs the feel of use.

[0003] Patent Document 1 proposes an attempt to improve the feel when used by using a formulation that combines specific polymers that form a hydrogel. However, there is a demand for a W / O type emulsion composition that provides an even better feel when used. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-89747 Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a W / O emulsion composition that provides an excellent feeling when used. [Means for solving the problem]

[0006] The present inventors conducted research to solve the above problems and discovered that a W / O emulsion composition with an excellent feel when used can be obtained by combining a specific silicone oil and an inorganic salt, thereby completing the present invention. That is, the gist of the present invention relates to the following.

[0007] [1] A W / O type emulsion composition containing the following components (A), (B), and (C): (A) One or two selected from lauryl PEG-9 polydimethylsiloxyethyl dimethicone and PEG-9 polydimethylsiloxyethyl dimethicone (B) Poly(oxyethylene-oxypropylene)methylpolysiloxane copolymer (C) Inorganic salts [2] The W / O type emulsion composition according to [1], wherein component (A) is lauryl PEG-9 polydimethylsiloxyethyl dimethicone. [3] The W / O type emulsion composition according to [1] or [2], wherein component (B) is one or more selected from PEG / PPG-18 / 18 dimethicone, PEG / PPG-19 / 19 dimethicone, cetyl PEG / PPG-10 / 1 dimethicone, and lauryl PEG / PPG-18 / 18 methicone. [4] The W / O emulsion composition according to any one of [1] to [3], wherein the component (C) is magnesium sulfate. [5] The W / O emulsion composition according to any one of [1] to [4], wherein the content of component (A) is 0.1% by mass to 10% by mass based on the total amount of the composition. [6] The W / O emulsion composition according to any one of [1] to [5], wherein the content of component (B) is 0.1% by mass to 10% by mass based on the total amount of the composition. [7] The W / O emulsion composition according to any one of [1] to [6], wherein the content of component (C) is 0.05% by mass to 4% by mass relative to the total amount of the composition. [8] The mass ratio of component (A) to component (B) ((A) / (B)) is 0.1 to 10 The W / O emulsion composition according to any one of [1] to [7], wherein [9] The W / O type emulsion composition according to any one of [1] to [8], wherein the mass ratio of the total of components (A) and (B) to component (C), ((A) + (B)) / (C), is 0.1 to 60.

[10] The W / O emulsion composition according to any one of [1] to [9], which is an external preparation for skin. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a W / O type emulsion composition having excellent usability. In particular, it is possible to provide a W / O type emulsion composition excellent in stickiness during application, ease of stretching during application, and lack of powdery feeling on the skin after application.

Mode for Carrying Out the Invention

[0009] Hereinafter, the present invention will be described. <W / O type emulsion composition> One aspect of the present invention relates to a W / O type emulsion composition (hereinafter sometimes referred to as "the W / O type emulsion composition of the present invention") containing the following components (A), (B) and (C). (A) One or two selected from lauryl PEG-9 polydimethylsiloxyethyl dimethicone and PEG-9 polydimethylsiloxyethyl dimethicone (B) Poly(oxyethylene·oxypropylene) methyl polysiloxane copolymer (C) Inorganic salt

[0010] The present inventors conducted various studies in search of a technique for enhancing the usability of W / O type emulsion compositions. Among them, the present inventors succeeded in creating a W / O type emulsion composition having excellent usability by combining lauryl PEG-9 polydimethylsiloxyethyl dimethicone and PEG-9 polydimethylsiloxyethyl dimethicone, which are silicone-branched polyether-modified silicones, with a poly(oxyethylene·oxypropylene) methyl polysiloxane copolymer, and combining them with an inorganic salt. Based on such findings, the present invention has been completed.

[0011] ≪Lauryl PEG-9 polydimethylsiloxyethyl dimethicone and PEG-9 polydimethylsiloxyethyl dimethicone of component (A)≫ ​The W / O emulsion composition of the present invention contains, as component (A), one or two silicone-branched polyether-modified silicones selected from lauryl PEG-9 polydimethylsiloxyethyl dimethicone and PEG-9 polydimethylsiloxyethyl dimethicone. Lauryl PEG-9 polydimethylsiloxyethyl dimethicone is preferred as component (A).

[0012] Such silicone branched polyether-modified silicones can be commercially available products, and are not limited thereto. Examples include lauryl PEG-9 polydimethylsiloxyethyl dimethicone "KF-6038" (manufactured by Shin-Etsu Chemical Co., Ltd.), and PEG-9 polydimethylsiloxyethyl dimethicone "KF-6028" (manufactured by Shin-Etsu Chemical Co., Ltd.), "KF-6028P" (manufactured by Shin-Etsu Chemical Co., Ltd.).

[0013] In the W / O emulsion composition of the present invention, the content of component (A) is preferably 0.1% by mass to 10% by mass, more preferably 0.2% by mass to 6% by mass, even more preferably 0.5% by mass to 5% by mass, and particularly preferably 1% by mass to 4% by mass, based on the total composition, from the viewpoint of the feel of the composition when used. When two types of component (A) are used in combination, the above content is the total amount of the two types. The blending ratio of the two types can be appropriately adjusted depending on the feel of use, etc.

[0014] Component (B): Poly(oxyethylene-oxypropylene)methylpolysiloxane copolymer The W / O emulsion composition of the present invention contains a poly(oxyethylene-oxypropylene)methylpolysiloxane copolymer as component (B). The poly(oxyethylene-oxypropylene)methylpolysiloxane copolymer may be either linear or branched, with linear poly(oxyethylene-oxypropylene)methylpolysiloxane copolymers being preferred. The linear poly(oxyethylene-oxypropylene)methylpolysiloxane copolymer may also be further modified by alkyl modification, alkoxy modification, or the like.

[0015] As such a linear poly(oxyethylene-oxypropylene)methylpolysiloxane copolymer, commercially available products can be used, and are not limited thereto. For example, PEG / PPG-15 / 15 dimethicone ("5330") can be used. Fluid"; DuPont Toray Specialty Materials), PEG / PPG-18 / 18 Dimethicone ("5200"; DuPont Toray Specialty Materials), PEG / PPG-19 / 19 Dimethicone ("BY11-030"; DuPont Toray Specialty Materials), PEG / PPG-20 / 20 Dimethicone ("SH3749"; Toray Dow Corning Silicones), PEG / PPG-30 / 10 Dimethicone ("BY25-339"; DuPont Toray Specialty Materials), PEG / PPG-20 / 22 Butyl Ether Dimethicone ("KF-6012"; Shin-Etsu Chemical Co., Ltd.), Lauryl PEG / PPG-18 / 18 Methicone ("5200 Formulation"; DuPont Toray Specialty Materials), Aid"; manufactured by DuPont Toray Specialty Materials Co., Ltd.), cetyl PEG / PPG-10 / 1 dimethicone ("Abil EM-90"; manufactured by Goldschmidt Chemical Co.), and the like. As component (B), PEG / PPG-18 / 18 dimethicone, PEG / PPG-19 / 19 dimethicone, cetyl PEG / PPG-10 / 1 dimethicone, and lauryl PEG / PPG-18 / 18 methicone are preferred, PEG / PPG-19 / 19 dimethicone and lauryl PEG / PPG-18 / 18 methicone are more preferred, and PEG / PPG-19 / 19 dimethicone is even more preferred. The poly(oxyethylene-oxypropylene)methylpolysiloxane copolymers may be used in the present invention either singly or in combination of two or more.

[0016] In the W / O emulsion composition of the present invention, the content of component (B) is preferably 0.1% by mass to 10% by mass, more preferably 0.2% by mass to 6% by mass, even more preferably 0.5% by mass to 5% by mass, and particularly preferably 1% by mass to 4% by mass, based on the total composition, from the viewpoint of the feel of use of the composition. When two or more types of component (B) are used in combination, the above content is the total amount of the two or more types. The blending ratio of the two or more types can be appropriately adjusted depending on the feel of use, etc.

[0017] Furthermore, the mass ratio of component (A) to component (B) in the present invention, as the mass ratio (A) / (B) of component (A) to component (B), is preferably from 0.1 to 10, more preferably from 0.1 to 8, more preferably from 0.2 to 5, and even more preferably from 0.5 to 2.5, from the viewpoint of the feel when using the composition.

[0018] <Inorganic salt of component (C)> The W / O emulsion composition of the present invention contains an inorganic salt as component (C). The inorganic salt may be either water-soluble or poorly water-soluble, but water-soluble inorganic salts are preferred. Commercially available inorganic salts can be used. Examples of water-soluble inorganic salts include salts of alkali metals or alkaline earth metals with halogens, sulfates, sulfites, phosphates, carbonates, etc., and specific examples thereof include chlorides such as sodium chloride, potassium chloride, calcium chloride, and magnesium chloride; sulfates such as sodium sulfate, potassium sulfate, and magnesium sulfate; sulfites such as sodium pyrosulfite; sodium carbonate; Examples of the component (C) include carbonates such as sodium hydrogen carbonate, etc. As the component (C), chlorides and sulfates are preferred, sodium chloride and magnesium sulfate are more preferred, and magnesium sulfate is even more preferred. The inorganic salts may be used in the present invention either individually or in combination of two or more.

[0019] In the present invention, the content of the inorganic salt of component (C) is preferably 0.05% by mass to 4% by mass, more preferably 0.08% by mass to 2% by mass, and even more preferably 0.2% by mass to 1.5% by mass, based on the total composition, from the viewpoint of the feel of the composition when used. When two or more types of component (C) are used in combination, the above content is the total amount of the two or more types. The blending ratio of the two or more types can be appropriately adjusted depending on the feel of the composition when used, etc.

[0020] Furthermore, in the present invention, the mass ratio ((A)+(B)) / (C) of the total of components (A) and (B) to component (C) is preferably 0.1 or more and 60 or less, more preferably 0.5 or more and 30 or less, more preferably 1 or more and 15 or less, and even more preferably 6 or more and 12 or less, from the viewpoint of the feel when using the composition.

[0021] <Other ingredients> The W / O emulsion composition of the present invention may contain other optional ingredients as long as the effects of the composition are not impaired. The optional components are not particularly limited and can be any components that can be normally blended in cosmetics, etc. The optional components can be used in the present invention either alone or in combination of two or more.

[0022] Such ingredients include, for example, oils and waxes such as 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, hydrogenated oil, Japan wax, hydrogenated castor oil, beeswax, candelilla wax, carnauba wax, Ibota wax, lanolin, reduced lanolin, hard lanolin, and jojoba wax; liquid paraffin, squalane, pristane, ozokerite, paraffin, ceresin, Hydrocarbons such as petrolatum and microcrystalline wax; higher fatty acids such as oleic acid, isostearic acid, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, and undecylenic acid; higher alcohols such as cetyl alcohol, stearyl alcohol, isostearyl alcohol, behenyl alcohol, octyldodecanol, myristyl alcohol, and cetostearyl alcohol; isononyl isononanoate, cetyl isooctanoate, and isopropyl myristate. Hexyldecyl isostearate, diisopropyl adipate, di-2-ethylhexyl sebacate, cetyl lactate, diisostearyl malate, ethylene glycol di-2-ethylhexanoate, neopentyl glycol dicaprate, glycerin di-2-heptylundecanoate, glycerin tri-2-ethylhexanoate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, pentane erythritol tetra-2-ethylhexanoate synthetic ester oils such as methyl ester; linear polysiloxanes such as dimethylpolysiloxane, methylphenylpolysiloxane, and diphenylpolysiloxane; cyclic polysiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexanesiloxane; silicone oils such as amino-modified polysiloxanes, polyether-modified polysiloxanes other than essential components, alkyl-modified polysiloxanes, and modified polysiloxanes such as fluorine-modified polysiloxanes;

[0023] Anionic surfactants such as fatty acid soaps (sodium laurate, sodium palmitate, etc.), potassium lauryl sulfate, and alkyl sulfate triethanolamine ether; cationic surfactants such as stearyltrimethylammonium chloride, benzalkonium chloride, and laurylamine oxide; imidazoline-based amphoteric surfactants (2-cocoyl-2-imidazolinium hydroxide-1-carboxyethyloxy disodium salt, etc.), and betaine-based surfactants. Surfactants (alkyl betaine, amido betaine, sulfobetaine, etc.), amphoteric surfactants such as acyl methyl taurine; sorbitan fatty acid esters (sorbitan monostearate, sorbitan sesquioleate, etc.), glycerin fatty acids (glycerin monostearate, etc.), propylene glycol fatty acid esters (propylene glycol monostearate, etc.), hydrogenated castor oil derivatives, glycerin alkyl ether, POE sorbitan fatty acid esters (POE sorbitan monooleate, polyoxyethylene sorbitan monostearate, etc.), POE sorbit fatty acid esters (POE-sorbit monolaurate, etc.), POE glycerin fatty acid esters (POE-glycerin monoisostearate, etc.), POE fatty acid esters (polyethylene glycol monooleate, POE distearate, etc.), POE alkyl nonionic surfactants such as phenyl ethers (POE 2-octyldodecyl ether, etc.), POE alkyl phenyl ethers (POE nonylphenyl ether, etc.), Pluronic (registered trademark) types, POE·POP alkyl ethers (POE·POP 2-decyltetradecyl ether, etc.), Tetronics, POE castor oil / hydrogenated castor oil derivatives (POE castor oil, POE hydrogenated castor oil, etc.), sucrose fatty acid esters, and alkyl glucosides; polyhydric alcohols such as polyethylene glycol, glycerin, 1,3-butylene glycol (1,3-BG), erythritol, sorbitol, xylitol, maltitol, propylene glycol, dipropylene glycol, diglycerin, isoprene glycol, 1,2-pentanediol, 2,4-hexanediol, 1,2-hexanediol, and 1,2-octanediol;

[0024] Powders such as mica, talc, kaolin, synthetic mica, calcium carbonate, magnesium carbonate, anhydrous silicic acid (silica), aluminum oxide, and barium sulfate, which may be surface-treated; inorganic pigments such as red iron oxide, red iron oxide, yellow iron oxide, black iron oxide, cobalt oxide, ultramarine, iron blue, titanium oxide, and zinc oxide, which may be surface-treated; pearling agents such as titanium dioxide, fish phosphorus foil, and bismuth oxychloride, which may be surface-treated; Organic pigments such as Red No. 202, Red No. 228, Red No. 226, Yellow No. 4, Blue No. 404, Yellow No. 5, Red No. 505, Red No. 230, Red No. 223, Orange No. 201, Red No. 213, Yellow No. 204, Yellow No. 203, Blue No. 1, Green No. 201, Purple No. 201, and Red No. 204 may be used; organic powders such as polyethylene powder, polymethyl methacrylate, methyl methacrylate crosspolymer, nylon powder, and organopolysiloxane elastomer;

[0025] Para-aminobenzoic acid-based UV absorbers; anthranilic acid-based UV absorbers; salicylic acid-based UV absorbers; cinnamic acid-based UV absorbers; benzophenone-based UV absorbers; sugar-based UV absorbers; UV absorbers such as 2-(2'-hydroxy-5'-t-octylphenyl)benzotriazole and 4-methoxy-4'-t-butyldibenzoylmethane;

[0026] Lower alcohols such as ethanol and isopropanol; vitamin A or its derivatives, vitamin B6 hydrochloride, vitamin B6 tripalmitate, vitamin B6 dioctanoate, vitamin B2 or its derivatives, vitamin B 12 , Vitamin B 15or derivatives thereof; vitamin E such as α-tocopherol, β-tocopherol, γ-tocopherol, vitamin E acetate, vitamin D, vitamin H, vitamins such as pantothenic acid, pantethine, pyrroloquinoline quinone, etc.; activators such as royal jelly, photosensitizers, cholesterol derivatives, etc.; blood circulation promoters such as nonylic acid valenylamide, capsaicin, zingerone, tannic acid, etc.; antiseborrheic agents such as sulfur, thianthol, etc.; water-soluble polymers such as collagen, hyaluronic acid and salts thereof; solvents such as water; film-forming agents such as trimethylsiloxysilicate, etc.; fragrances, etc.

[0027] In addition, the W / O emulsion composition of the present invention may optionally contain various active ingredients, moisturizers, pH adjusters, preservatives, antibacterial agents, antioxidants, antioxidant aids, and the like.

[0028] The active ingredients include whitening ingredients, anti-wrinkle ingredients, anti-inflammatory ingredients, and extracts derived from plants and animals.

[0029] The whitening ingredient is not particularly limited as long as it is one commonly used in cosmetics, and examples thereof include 4-n-butylresorcinol, ascorbic acid glucoside, 3-O-ethyl ascorbic acid, tranexamic acid, arbutin, ellagic acid, kojic acid, linoleic acid, nicotinamide, 5,5'-dipropylbiphenyl-2,2'-diol, 5'-adenylate disodium, cetyl tranexamate, 4-methoxysalicylic acid potassium salt, hydroquinone, and pantothenic acid.

[0030] The wrinkle-improving component is not particularly limited as long as it is one that is commonly used in cosmetics, and examples thereof include sodium trifluoroisopropyloxopropylaminocarbonylpyrrolidinecarbonylmethylpropylaminocarbonylbenzoylaminoacetate, nicotinamide, vitamin A or its derivatives (retinol, retinal, retinoic acid, tretinoin, isotretinoin, tocopherol retinoate, retinol palmitate, retinol acetate, etc.), ursolic acid benzyl ester, ursolic acid phosphate ester, betulinic acid benzyl ester, and benzilic acid phosphate ester.

[0031] Anti-inflammatory ingredients include kurarinone, glabridin, glycyrrhizinic acid, glycyrrhetinic acid, pantothenyl alcohol, etc., and preferred are glycyrrhizinic acid and its salts, alkyl glycyrrhetinates and their salts, and glycyrrhetinic acid and its salts.

[0032] The extracts derived from plants and animals are not particularly limited as long as they are generally used in pharmaceuticals, cosmetics, foods, etc. Examples include Akebia extract, Asunaro extract, Asparagus extract, Avocado extract, Hydrangea tea extract, Almond extract, Arnica extract, Aloe extract, Aronia extract, Apricot extract, Ginkgo extract, Kinoko extract, Fennel extract, Aralia extract, Angelica extract, Angelica dahurica extract, Siberian ginseng extract, Enmeiso extract, Scutellaria root extract, Phellodendron bark extract, Coptis japonica extract, Panax ginseng extract, Hypericum perforatum extract, Nettle extract, Orange extract, Okra extract, Pueraria root extract, Chamomilla recutita extract, Carrot extract , Artemisia capillaris extract, Licorice extract, Kiwi extract, Cucumber extract, Guava extract, Sophora root extract, Gardenia extract, Sasa veitchii extract, Sophora flavescens extract, Walnut extract, Grapefruit extract, Black rice extract, Chlorella extract, Mulberry extract, Cinnamon root extract, Alpinia zerumbet extract, Gentian extract, Geranium herb extract, Black tea extract, Burdock extract, Rice extract, Fermented rice extract, Fermented rice bran extract, Rice germ oil, Cowberry extract, Salvia extract, Soapwort extract, Bamboo extract, Hawthorn extract, Sandalwood extract, Zanthoxylum pepper extract, Shiitake mushroom extract, Rehmannia root extract, Lithospermum root extract, Perilla extract, Tilia extract, Meadowsweet extract, Peony extract, Ginger extract, Calamus root extract, Birch extract, Horsetail extract, Stevia extract, Stevia fermented product, Ivy extract, Hawthorn extract, Elderberry extract, Yarrow extract, Peppermint extract, Sage extract, Mallow extract, Cnidium extract, Swertia japonica extract, Soybean extract, Rhubarb extract, Soybean extract Kiss, taisho extract, thyme extract, dandelion extract, tea extract, clove extract, tangerine extract, sweet tea extract, chili pepper extract, angelica extract, calendula extract, peach kernel extract, spruce extract, houttuynia extract, tomato extract, natto extract, carrot extract, garlic extract, wild rose extract, hibiscus extract, basil extract, lotus extract, parsley extract, birch extract, witch hazel extract, jasmine extract, cypress extract, loquat extract, coltsfoot extract, butterbur extract, poria extract,Butcher's broom extract, grape extract, grape seed extract, loofah extract, safflower extract, peppermint extract, linden extract, peony extract, hop extract, pine extract, Preferred examples of extracts include mayonnaise extract, horse chestnut extract, skunk cabbage extract, soapberry extract, melissa extract, mozuku extract, peach extract, cornflower extract, eucalyptus extract, saxifrage extract, yuzu extract, lily extract, coix seed extract, mugwort extract, lavender extract, green tea extract, apple extract, rooibos tea extract, lychee extract, lettuce extract, lemon extract, forsythia extract, astragalus extract, rose extract, rosemary extract, Roman chamomile extract, royal jelly extract, and burnet extract.

[0033] Examples of moisturizing agents include polyethylene glycol, propylene glycol, glycerin, 1,3-butylene glycol, xylitol, sorbitol, maltitol, chondroitin sulfate, hyaluronic acid, mucoitin sulfate, caronic acid, atelocollagen, cholesteryl-12-hydroxystearate, sodium lactate, bile salts, dl-pyrrolidone carboxylate, short-chain soluble collagen, diglycerin (EO)PO adduct, Rosa robur extract, yarrow extract, melilot extract, and the like.

[0034] Examples of pH adjusters include buffers such as lactic acid-sodium lactate, citric acid-sodium citrate, and succinic acid-sodium succinate.

[0035] Examples of preservatives include methylparaben, ethylparaben, butylparaben, and phenoxyethanol.

[0036] Preferred examples of the antibacterial agent include synthetic antibacterial agents such as 1,3-butylene glycol and paraoxybenzoic acid esters, as well as natural antibacterial substances such as caprylyl glycol, glyceryl caprylate, ethylhexylglycerin, and caprylhydroxamic acid.

[0037] Examples of antioxidants include tocopherols, dibutylhydroxytoluene, butylhydroxyanisole, gallic acid esters, etc. Examples of antioxidant aids include phosphoric acid, citric acid, ascorbic acid, maleic acid, malonic acid, succinic acid, fumaric acid, cephalin, hexametaphosphate, phytic acid, ethylenediaminetetraacetic acid, etc.

[0038] These optional components can be added in any step of the present invention or before or after the step.

[0039] The W / O emulsion composition of the present invention can be produced by a conventional emulsification method, except for the above-mentioned essential components. For example, the oil phase component is heated and dissolved, the powder component is added and dispersed, and the heated and dissolved aqueous phase component is added to the oil phase, followed by emulsification with stirring to obtain a W / O emulsion composition.

[0040] <External skin preparations> The W / O type emulsion composition of the present invention can be used, for example, as a topical skin preparation, a medicine, or a cosmetic preparation including a quasi-drug. Cosmetics are particularly preferred. The formulation is not particularly limited as long as it is a W / O type emulsion formulation, and examples thereof include a liquid, emulsion, paste, cream, gel, etc., with a liquid or emulsion being preferred.

[0041] The type of cosmetic of the present invention is not particularly limited, and can be widely used in known cosmetic compositions that use a W / O type emulsion. Specific examples of such cosmetic compositions include makeup cosmetics such as makeup base, foundation, eye shadow, eye liner, and lipstick, and sunscreen cosmetics such as sunscreen lotion and sunscreen cream.

[0042] Except for using the W / O emulsion composition of the present invention, cosmetics including external skin preparations, medicines, and quasi-drugs can be produced using conventionally known production methods. [Example]

[0043] The present invention will be specifically described below with reference to examples, but these are merely examples of the present invention and the scope of the present invention is not limited to these examples.

[0044] W / O type emulsion compositions of Examples and Comparative Examples were prepared and evaluated according to the formulations shown in Table 1. Specifically, the procedures were as follows: The oil phase components were heated to 70°C to dissolve them, and the powder components were added and dispersed. The aqueous phase components, which had also been heated and dissolved at 70°C, were added to the oil phase, and the mixture was emulsified while stirring with a homomixer to obtain the desired W / O type emulsion compositions.

[0045] For the W / O type emulsion compositions of the Examples and Comparative Examples, a usage test was conducted in which each prepared sample was used by an expert evaluator. The results are shown in Table 1.

[0046] The criteria for judgment are as follows: 1) Non-sticky Ten expert evaluators evaluated the stickiness of the W / O cosmetic products when touching the skin while applying them, using the following five-point scale. The evaluation results in the table are the total scores of the 10 expert evaluators. 5. No sticky feeling on the skin during application. 4. There is almost no stickiness on the skin during application. 3: The skin feels a little sticky during application. 2: The skin feels sticky during application. 1: The skin feels quite sticky during application.

[0047] 2) No powdery feeling on the skin after application Ten expert evaluators applied 0.16 g of each W / O emulsion cosmetic to the face using a sponge, and visually evaluated the powdery feel immediately after application using the following five-point scale. The results are shown as the total scores of the 10 evaluators. 5. No powdery feeling at all. 4. No powdery feeling. 3. Not too powdery. 2: It has a powdery feel. 1: It has quite a powdery feel.

[0048] 3) Ease of stretching Ten expert evaluators applied the W / O type cosmetics to the skin and rated the spreadability during application on the following five-point scale. The evaluation results in the table are the total scores of the 10 expert evaluators. 5. Spreads very well on the skin. 4. Spreads easily on the skin. 3: Spreads fairly easily on the skin. 2: It doesn't spread well on the skin. 1: It doesn't spread well on the skin.

[0049] [Table 1]

[0050] The W / O type emulsion compositions of the examples containing component (A), component (B), and component (C) are excellent in terms of feel when used, being non-sticky, not leaving a powdery feeling on the skin after application, and being easy to spread. I understand. On the other hand, the following comparative examples provided an unsatisfactory feel when used: Comparative Example 1, which did not contain component (A); Comparative Example 2, which did not contain component (B); Comparative Example 3, which did not contain component (C); Comparative Example 4, which contained a silicone-branched polyglycerin-modified silicone instead of component (A); Comparative Example 5, which contained a polyoxyethylene methylpolysiloxane copolymer instead of component (B); and Comparative Example 6, which contained an organic acid salt instead of component (C). It was also found that lauryl PEG-9 polydimethylsiloxyethyl dimethicone is more preferable as component (A), PEG / PPG-19 / 19 dimethicone is more preferable as component (B), magnesium sulfate is more preferable as component (C), the mass ratio of components (A) / (B) is more preferably 0.5 to 2.5, and the mass ratio of components ((A)+(B)) / (C) is more preferably 6 to 12. [Industrial Applicability]

[0051] The present invention can be applied to external skin preparations, medicines, cosmetics including quasi-drugs, and the like.

Claims

1. The following components (A), (B) and (C): (A) 0.1% by mass to 10% by mass of lauryl PEG-9 polydimethylsiloxyethyl dimethicone, based on the total amount of the composition (B) 0.1% by mass to 10% by mass of one or two compounds selected from PEG / PPG-19 / 19 dimethicone and lauryl PEG / PPG-18 / 18 methicone, based on the total amount of the composition. (C) 0.05% by mass to 4% by mass of an inorganic salt based on the total amount of the composition A W / O type emulsion composition comprising: the mass ratio of component (A) to component (B) ((A) / (B)) is 0.4 to 10; The W / O type emulsion composition.

2. 2. The W / O emulsion composition according to claim 1, wherein the component (C) is magnesium sulfate.

3. 3. The W / O emulsion composition according to claim 1, wherein the mass ratio of the total of the components (A) and (B) to the component (C), ((A) + (B)) / (C), is 0.1 to 60.

4. The W / O type emulsion composition according to any one of claims 1 to 3, which is an external preparation for skin.

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