JP2022167084A - W/O emulsion composition - Google Patents

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 The present invention relates to a W/O emulsion composition suitable for cosmetics and the like.

A W/O type emulsion composition (water-in-oil type emulsion composition) has a high blocking effect due to the presence of an oily component in the continuous phase, and has advantages such as high moisture retention. On the other hand, the W/O type emulsion composition has problems with feeling during use such as stickiness during application and poor spreadability. In addition, there is also a problem in that the blending of powder causes the skin to feel powdery after application, impairing the feeling of use.

Patent Literature 1 proposes an attempt to enhance the feeling of use by formulating a combination of specific polymers that form hydrogels. However, there is a demand for a W/O emulsion composition that is even more comfortable to use.

JP 2019-89747 A

An object of the present invention is to provide a W/O emulsified composition with excellent feel during use.

The inventors of the present invention conducted studies to solve the above problems, and found that a combination of a specific silicone oil and an inorganic salt can provide a W/O emulsion composition with an excellent feel during use. completed the invention.
That is, the gist of the present invention relates to the following.

[1] A W/O 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 Salt [2] The W/O emulsion composition according to [1], wherein component (A) is lauryl PEG-9 polydimethylsiloxyethyl dimethicone.
[3] component (B) is 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 1 The W/O emulsion composition according to [1] or [2], which is a species or two or more species.
[4] The W/O emulsion composition according to any one of [1] to [3], wherein 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 relative to the total amount of the composition. thing.
[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 relative to the total amount of the composition. thing.
[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. thing.
[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 total mass ratio of component (A) and component (B) to component (C) ((A) + (B)) / (C) is 0.1 to 60, [1] to [ 8]. The W/O emulsion composition according to any one of [8].
[10] The W/O emulsion composition according to any one of [1] to [9], which is an external preparation for skin.

According to the present invention, it is possible to provide a W/O emulsified composition with excellent feeling during use. In particular, it is possible to provide a W/O emulsion composition that is excellent in non-stickiness during application, ease of spreading during application, and non-powdery feeling on the skin after application.

The present invention will be described below.
<W/O type emulsion composition>
One aspect of the present invention is
The present invention relates to a W/O emulsion composition (hereinafter sometimes referred to as "the W/O 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) methylpolysiloxane copolymer (C) inorganic salt

The inventors of the present invention conducted various studies in search of a technique for enhancing the feeling of use of a W/O emulsion composition.
Among them, the present inventors discovered silicone-branched polyether-modified silicones, lauryl PEG-9 polydimethylsiloxyethyl dimethicone and PEG-9 polydimethylsiloxyethyl dimethicone and poly(oxyethylene oxypropylene) methylpolysiloxane. By combining with a copolymer and combining with an inorganic salt, we have succeeded in creating a W/O type emulsified composition with excellent usability. Based on such knowledge, the present invention was completed.

<<Component (A) Lauryl PEG-9 Polydimethylsiloxyethyl Dimethicone and PEG-9 Polydimethylsiloxyethyl Dimethicone>>
In the W/O emulsion composition of the present invention, as component (A), one or two silicone branched polyethers selected from lauryl PEG-9 polydimethylsiloxyethyl dimethicone and PEG-9 polydimethylsiloxyethyl dimethicone Contains modified silicone. Lauryl PEG-9 polydimethylsiloxyethyl dimethicone is preferred as component (A).

Commercially available products can be used as such silicone-branched polyether-modified silicones, and although not limited, for example, "KF-6038" (manufactured by Shin-Etsu Chemical Co., Ltd.) as lauryl PEG-9 polydimethylsiloxyethyl dimethicone. PEG-9 polydimethylsiloxyethyl dimethicone such as "KF-6028" (manufactured by Shin-Etsu Chemical Co., Ltd.) and "KF-6028P" (manufactured by Shin-Etsu Chemical Co., Ltd.).

In the W/O emulsion composition of the present invention, the content of component (A) is preferably 0.1% by mass or more and 10% by mass or less based on the total composition, from the viewpoint of the feeling of use of the composition. 0.2 mass % or more and 6 mass % or less is more preferable, 0.5 mass % or more and 5 mass % or less is more preferable, and 1 mass % or more and 4 mass % or less is particularly preferable. 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 according to the feeling of use and the like.

<<Poly(oxyethylene/oxypropylene)methylpolysiloxane copolymer of component (B)>>
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 linear or branched, but a linear poly(oxyethylene/oxypropylene)methylpolysiloxane copolymer is preferred. The linear poly(oxyethylene/oxypropylene)methylpolysiloxane copolymer may be modified by alkyl modification, alkoxy modification, or the like.

Commercially available products can be used as such linear poly(oxyethylene/oxypropylene) methylpolysiloxane copolymers. ”; manufactured by DuPont Toray Specialty Materials), PEG/PPG-18/18 dimethicone (“5200”; manufactured by DuPont Toray Specialty Materials), PEG/PPG-19/19 dimethicone (“BY11-030 ”; manufactured by DuPont Toray Specialty Materials), PEG/PPG-20/20 dimethicone (“SH3749”; manufactured by Toray Dow Corning Silicone), 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 Aid”; DuPont Toray Specialty Materials Co., Ltd.), cetyl PEG/PPG-10/1 dimethicone (“Abil EM-90”; Goldschmidt Chemical Co.), and the like.
Component (B) is preferably PEG/PPG-18/18 dimethicone, PEG/PPG-19/19 dimethicone, cetyl PEG/PPG-10/1 dimethicone and lauryl PEG/PPG-18/18 methicone, and 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.
Poly(oxyethylene-oxypropylene)methylpolysiloxane copolymers may be used singly or in combination of two or more in the present invention.

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

Further, the mass ratio of the component (A) and the component (B) in the present invention is the mass ratio (A) / (B) of the component (A) to the component (B), from the viewpoint of the feeling of use of the composition, 0.1 or more and 10 or less are preferable, 0.1 or more and 8 or less are preferable, 0.2 or more and 5 or less are more preferable, 0.5 or more and 2.5 or less are still more preferable.

<<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 slightly 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, alkaline earth metals, halogens, sulfuric acid, sulfurous acid, phosphoric acid, carbonic acid, etc. Specific examples include sodium chloride, potassium chloride, and calcium chloride. , chlorides such as magnesium chloride, sulfates such as sodium sulfate, potassium sulfate and magnesium sulfate, sulfites such as sodium pyrosulfite, and carbonates such as sodium carbonate and sodium hydrogen carbonate. As component (C), chlorides and sulfates are preferred, sodium chloride and magnesium sulfate are more preferred, and magnesium sulfate is even more preferred.
Inorganic salts may be used singly or in combination of two or more in the present invention.

In the present invention, the content of the inorganic salt of component (C) is preferably 0.05% by mass or more and 4% by mass or less, and 0.08% by mass or more, relative to the entire composition, from the viewpoint of the feeling of use of the composition. 2% by mass or less is more preferable, and 0.2% by mass or more and 1.5% by mass or less is even more preferable. In addition, when using a combination of 2 or more types of component (C), the said content is a total amount of 2 or more types. The blending ratio of two or more types can be appropriately adjusted according to the feeling of use and the like.

In the present invention, the total mass ratio of component (A) and component (B) to component (C) ((A)+(B))/(C) is 0.00 from the viewpoint of the feeling of use of the composition. 1 or more and 60 or less are preferable, 0.5 or more and 30 or less are preferable, 1 or more and 15 or less are more preferable, and 6 or more and 12 or less are more preferable.

≪Other ingredients≫
In addition, the W/O emulsion composition of the present invention can contain other optional components as long as the effects are not impaired.
The optional component is not particularly limited as long as it is a component that can be usually blended in cosmetics and the like, and can be used. Optional ingredients may be used in the present invention either singly or in combination of two or more.

Such 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, hydrogenated oil. , Japanese wax, hydrogenated castor oil, beeswax, candelilla wax, carnauba wax, ibota wax, lanolin, reduced lanolin, hard lanolin, jojoba wax, oils and waxes; liquid paraffin, squalane, pristane, ozokerite, paraffin, ceresin, vaseline, microcrystalline Hydrocarbons such as 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 alcohol, behenyl alcohol, octyldodeca Higher alcohols such as nol, myristyl alcohol, cetostearyl alcohol, etc.; Stearyl, ethylene glycol di-2-ethylhexanoate, neopentyl glycol dicaprate, glyceryl di-2-heptylundecanoate, glyceryl tri-2-ethylhexanoate, trimethylolpropane tri-2-ethylhexanoate, triisostearic acid Synthetic ester oils such as trimethylolpropane and pentane erythritol of tetra-2-ethylhexanoate; chain polysiloxanes such as dimethylpolysiloxane, methylphenylpolysiloxane and diphenylpolysiloxane; octamethylcyclotetrasiloxane and decamethylcyclopenta Cyclic polysiloxanes such as siloxane and dodecamethylcyclohexanesiloxane; oils such as 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;

Anionic surfactants such as fatty acid soaps (sodium laurate, sodium palmitate, etc.), potassium lauryl sulfate, alkyl sulfate triethanolamine ether; cationic surfactants such as stearyltrimethylammonium chloride, benzalkonium chloride, laurylamine oxide Class; imidazoline amphoteric surfactant (2-cocoyl-2-imidazolinium hydroxide-1-carboxyethyloxy disodium salt, etc.), betaine surfactant (alkylbetaine, amidobetaine, sulfobetaine, etc.), acyl Amphoteric surfactants such as methyl taurine; sorbitan fatty acid esters (sorbitan monostearate, sorbitan sesquioleate, etc.), glycerin fatty acids (glyceryl 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 sorbitol fatty acid esters (POE-sorbitol monolaurate, etc.), POE glycerin Fatty acid esters (POE-glycerin monoisostearate, etc.), POE fatty acid esters (polyethylene glycol monooleate, POE distearate, etc.), POE alkyl ethers (POE 2-octyldodecyl ether, etc.), POE alkylphenyl ethers (POE nonyl phenyl ether, etc.), Pluronic (registered trademark) types, POE/POP alkyl ethers (POE/POP 2-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 esters, alkyl glucosides; polyethylene glycol, glycerin, 1,3-butylene glycol (1,3-BG), erythritol, sorbitol, xylitol, maltitol, propylene Polyhydric alcohols such as glycol, dipropylene glycol, diglycerin, isoprene glycol, 1,2-pentanediol, 2,4-hexanediol, 1,2-hexanediol, 1,2-octanediol;

Surface-treated powders such as mica, talc, kaolin, synthetic mica, calcium carbonate, magnesium carbonate, silicic anhydride (silica), aluminum oxide, barium sulfate, etc., which may be surface-treated , Red iron oxide, Yellow iron oxide, Black iron oxide, Cobalt oxide, Ultramarine blue, Prussian blue, Titanium oxide, Inorganic pigments such as Zinc oxide, Surface-treated Titanium mica, Fish phosphorus foil, Oxychloride Pearl agents such as bismuth, optionally laked 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, Organic dyes such as 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, polyethylene powder, polymethyl methacrylate, methyl methacrylate crosspolymer , nylon powder, organic powders such as organopolysiloxane elastomer;

para-aminobenzoic acid-based UV absorber; anthranilic acid-based UV absorber; salicylic acid-based UV absorber; cinnamic acid-based UV absorber; benzophenone-based UV absorber; sugar-based UV absorber; UV absorbers such as -t-octylphenyl)benzotriazole, 4-methoxy-4'-t-butyldibenzoylmethane;

Lower alcohols such as ethanol and isopropanol; vitamin A or derivatives thereof, vitamin B ₆ hydrochloride, vitamin B ₆ tripalmitate, vitamin B ₆ dioctanoate, vitamin B ₂ or derivatives thereof, vitamin B ₁₂ , vitamin B ₁₅ or derivatives thereof B vitamins such as α-tocopherol, β-tocopherol, γ-tocopherol, vitamin E such as vitamin E acetate, vitamin D, vitamin H, pantothenic acid, pantethine, pyrroloquinoline quinone, etc.; royal jelly, activators such as photosensitizers and cholesterol derivatives; blood circulation promoters such as nonylic acid werenylamide, capsaicin, gingerone and tannic acid; antiseborrheic agents such as sulfur and thianthol; water-soluble polymers such as collagen, hyaluronic acid and salts thereof; Solvents such as water; film-forming agents such as trimethylsiloxysilicate; fragrances and the like.

In addition, various active ingredients, moisturizing agents, pH adjusters, preservatives, antibacterial agents, antioxidants/antioxidant aids, and the like can be arbitrarily added to the W/O emulsion composition of the present invention.

Active ingredients include whitening ingredients, wrinkle-improving ingredients, anti-inflammatory ingredients, extracts derived from animals and plants, and the like.

The whitening component is not particularly limited as long as it is commonly used in cosmetics. For example, 4-n-butylresorcinol, ascorbic acid glucoside, 3-O-ethylascorbic acid, tranexamic acid, arbutin, ellagic acid, kojic acid, linoleic acid, nicotinamide, 5,5′-dipropylbiphenyl-2, 2'-diol, disodium 5'-adenylate, cetyl tranexamate, potassium 4-methoxysalicylate, hydroquinone, pantothenic acid and the like.

The wrinkle-improving component is not particularly limited as long as it is commonly used in cosmetics. For example, sodium trifluoride isopropyloxopropylaminocarbonylpyrrolidinecarbonylmethylpropylaminocarbonylbenzoylaminoacetate, nicotinamide, vitamin A or derivatives thereof (retinol, retinal, retinoic acid, tretinoin, isotretinoin, tocopherol retinoate, retinol palmitate , retinol acetate, etc.), benzyl ursolic acid, ursolic acid phosphate, betulinic acid benzyl ester, and benzylic acid phosphate.

The anti-inflammatory component includes clarinone, glabridin, glycyrrhizic acid, glycyrrhetinic acid, pantothenyl alcohol and the like, preferably glycyrrhizic acid and its salts, alkyl glycyrrhetinate and its salts, and glycyrrhetinic acid and its salts.

The extract derived from animals and plants is not particularly limited as long as it is generally used in pharmaceuticals, cosmetics, foods, and the like. For example, akebi extract, asunaro extract, asparagus extract, avocado extract, amacha extract, almond extract, arnica extract, aloe extract, aronia extract, apricot extract, ginkgo biloba extract, Indian mushroom extract, fennel extract, udo extract, ageitsu extract, eleuthero extract , Trillium extract, Scutellaria root extract, Phellodendron extract, Coptis extract, Panax ginseng extract, Hypericum extract, Dead nettle extract, Orange extract, Kakyoku extract, Kakon extract, Chamomile extract, Carrot extract, Kawara mugwort extract, Glycyrrhiza extract, Kiwi extract, Cucumber extract, Guava extract, Kujin extract, Gardenia extract, Kumazasa extract, Clara extract, Walnut extract, Grapefruit extract, Black rice extract, Chlorella extract, Mulberry extract, Gerbera extract, Alpinia extract, Gentian extract, Gennoshoko 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 grass extract, hawthorn extract, sansha extract, Japanese pepper extract, shiitake extract, rhubarb extract, rhizome extract, perilla extract, linden extract, meadowsweet extract, peony extract, ginger extract, calamus root extract, white birch extract, horsetail extract, stevia extract, fermented stevia, ivy extract, hawthorn extract, elderberry extract, yarrow extract, mint extract, sage extract, mallow extract, cnidium Extract, assembly extract, sage extract, rhubarb extract, soybean extract, taisou extract, thyme extract, dandelion extract, tea extract, clove extract, chimp extract, sweet tea extract, capsicum extract, angelica extract, calendula officinalis extract, tonin extract, spruce extract, houttuynia extract , tomato extract, natto extract, carrot extract, garlic extract, wild rose extract, hibiscus extract, tapir extract, lotus extract, parsley extract, birch extract, hamamelis extract, cypress extract, cypress extract, loquat extract, coltsfoot extract, coltsfoot extract, bukuryo extract , Butcher Bloom Extract, Grape Extract, Grape Seed Extract, Loofah Extract, Safflower Extract, Peppermint Extract, Botanical Extract daiju extract, button extract, hop extract, pine extract,
Mayonara 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, yokuinin 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, chamomile extract, royal jelly extract, burnet extract, and the like.

Moisturizers include polyethylene glycol, propylene glycol, glycerin, 1,3-butylene glycol, xylitol, sorbitol, maltitol, chondroitin sulfate, hyaluronic acid, mucoitin sulfate, caroninic acid, atelocollagen, cholesteryl-12-hydroxystearate, and lactic acid. Sodium, bile salts, dl-pyrrolidone carboxylate, short-chain soluble collagen, diglycerin (EO)PO adducts, Rose rose extract, Achillea millefolium extract, Melilot extract and the like.

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

Preservatives include methylparaben, ethylparaben, butylparaben, phenoxyethanol and the like.

The antibacterial agent preferably includes synthetic antibacterial agents such as 1,3-butylene glycol and paraoxybenzoic acid ester, as well as natural antibacterial substances such as caprylyl glycol, glyceryl caprylate, ethylhexylglycerin, and caprylhydroxamic acid.

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

In addition, these optional components can be added at any step in the present invention or before or after it.

The method for producing the W/O type emulsion composition of the present invention can be produced based on a conventional emulsification method, except that the above-mentioned essential components are included. For example, the oil phase component is heated and dissolved, the powder component is added and dispersed, the water phase component dissolved by heating is added to the oil phase, and emulsified with stirring to obtain a W/O emulsion composition.

≪External preparation for skin≫
The W/O emulsion composition of the present invention can be used, for example, in the form of external skin preparations, pharmaceuticals, cosmetics including quasi-drugs, and the like. Cosmetics are particularly preferred. The dosage form is not particularly limited as long as it is a W/O emulsified dosage form, and examples thereof include liquid, milky lotion, paste, cream, and gel dosage forms. is preferred.

The type of cosmetic of the present invention is not particularly limited, and it can be widely used for known cosmetics in which a W/O emulsifier type is used. Specific examples of cosmetics include makeup cosmetics such as makeup bases, foundations, eye shadows, eyeliners, and lipsticks, and sunscreen cosmetics such as sunscreen lotions and sunscreen creams.

Other than using the W/O emulsified composition of the present invention, cosmetics including external skin preparations, pharmaceuticals, and quasi-drugs can be produced using conventionally known production methods.

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

Using the formulations shown in Table 1, W/O emulsion compositions of Examples and Comparative Examples were prepared and evaluated. Specifically, it was carried out as follows. The oil phase component was heated to 70° C. to dissolve, and the powder component was added and dispersed. Similarly, the aqueous phase component dissolved by heating at 70° C. was added to the oil phase and emulsified while stirring with a homomixer to obtain the desired W/O emulsion composition.

For the W/O emulsion compositions of Examples and Comparative Examples, each prepared sample was used by a professional evaluator to conduct a usage test. Table 1 shows the results.

In addition, the judgment criteria are as follows.
1) Absence of stickiness Ten professional evaluators evaluated the stickiness of the W/O type cosmetic while it was applied to the skin according to the following five grades. The evaluation results in the table are indicated by the total score of 10 professional evaluators.
5; There is no stickiness on the skin during application.
4; Almost no stickiness on the skin during application.
3; Slightly sticky on the skin during application.
2; The skin is sticky during application.
1; There is considerable stickiness on the skin during application.

2) Lack of powdery feel on the skin after application Ten professional evaluators applied 0.16 g of each W/O emulsified cosmetic to the face using a sponge, and evaluated the powdery feel immediately after application according to the following 5 criteria. It was visually evaluated in stages. The result was shown by the total score of 10 persons.
5; There is no powdery feeling.
4; No powdery feeling.
3; There is not much powdery feeling.
2; there is a feeling of powder.
1; Considerably powdery.

3) Spreadability 10 professional evaluators applied the W/O type cosmetic to the skin and evaluated the spreadability during application on the following 5-grade scale. The evaluation results in the table are indicated by the total score of 10 professional evaluators.
5; Spreadability on the skin is very good.
4; Good spreadability on the skin.
3; Slightly good spreadability on the skin.
2; The spread on the skin is slightly poor.
1; Spread on the skin is poor.

The W/O emulsion compositions of Examples containing component (A), component (B) and component (C) are non-sticky, non-powdery on the skin after application, and easy to spread. was found to be superior to
On the other hand, Comparative Example 1 that does not contain component (A), Comparative Example 2 that does not contain component (B), Comparative Example 3 that does not contain component (C), and silicone branched polyglycerin-modified silicone instead of component (A) Comparative Example 4 containing, Comparative Example 5 containing a polyoxyethylenemethylpolysiloxane copolymer instead of the component (B), Comparative Example 6 containing an organic acid salt instead of the component (C), the feeling of use was inadequate.
Lauryl PEG-9 polydimethylsiloxyethyl dimethicone is more preferable as component (A), PEG/PPG-19/19 dimethicone is more preferable as component (B), and 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. I found out.

INDUSTRIAL APPLICABILITY The present invention can be applied to external skin preparations, pharmaceuticals, cosmetics including quasi-drugs, and the like.

Claims (10)

A W/O 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 salt The W/O emulsion composition according to claim 1, wherein component (A) is lauryl PEG-9 polydimethylsiloxyethyl dimethicone. Component (B) is one or two 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 3. The W/O emulsion composition according to claim 1 or 2, which is at least one seed. The W/O emulsion composition according to any one of claims 1 to 3, wherein component (C) is magnesium sulfate. The W/O emulsion composition according to any one of claims 1 to 4, wherein the content of component (A) is 0.1% by mass to 10% by mass relative to the total amount of the composition. The W/O emulsion composition according to any one of claims 1 to 5, wherein the content of component (B) is 0.1% by mass to 10% by mass relative to the total amount of the composition. The W/O emulsion composition according to any one of claims 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. The W/O emulsion composition according to any one of claims 1 to 7, wherein the mass ratio ((A)/(B)) of component (A) to component (B) is 0.1 to 10. thing. Any one of claims 1 to 8, wherein the total mass ratio of component (A) and component (B) to component (C) ((A) + (B))/(C) is 0.1 to 60. 2. The W/O emulsion composition according to item 1. The W/O emulsion composition according to any one of claims 1 to 9, which is an external preparation for skin.