Water-in-oil emulsion cosmetics

Abstract

To provide a water-in-oil emulsion cosmetic that easily agrees with skin when applied on the skin and gives a melting feeling of use.SOLUTION: A water-in-oil emulsion cosmetic contains (A) semisolid oil with a melting point of 28-40°C of 3-10 mass% relative to the total amount of the cosmetic, (B) a polar oil, and (C) a nonvolatile oil (excluding the (B) polar oil). The mass ratio of the (A) semisolid oil to the (B) polar oil is 0.4-0.9. The mass ratio of the (A) semisolid oil to the total amount of the (B) polar oil and (C) nonvolatile oil is 0.2-0.5.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a water-in-oil emulsion cosmetic. [Background technology]

[0002] Cosmetics are blended with various solid oils from various viewpoints. For example, Patent Document 1 describes that in an oil-based cosmetic containing a specific ester oil, a liquid ester oil other than the specific ester oil or a higher alcohol, and a silicone oil having a nonionic hydrophilic group, a solid wax that is solid at 25°C and has a melting point of 50 to 140°C is blended in order to impart appropriate hardness to the cosmetic, inhibit the oil from bleeding out, and improve the durability of the applied film.

[0003] Furthermore, Patent Document 2 describes an emulsion composition containing zinc decyltrisiloxanecarboxylate capable of gelling oil, which contains a polyhydric alcohol fatty acid ester, particularly polyglyceryl triisostearate, glyceryl monoisostearate, pentaerythritol fatty acid ester, or isostearyl glyceryl ether, in which the number of moles of glycerin added is 4 to 10 and the number of isostearic acid residues is 1 to 4, silicone oil, and water, and which has high stability as a formulation, provides a fresh feel when used and a glossy finish, while also providing long-lasting makeup due to the seepage of the silicone oil.

[0004] Furthermore, Patent Document 3 describes that a cosmetic composition containing a specific paste-like substance having a melting point below 50°C in an amount of more than 1% by mass relative to the total mass of the composition and a silicone elastomer, particularly a non-emulsified silicone elastomer, can effectively cover or conceal skin defects and provide a good fit. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2017-197439 A [Patent Document 2] International Publication No. 2014 / 069403 [Patent Document 3] JP 2016-88911 A DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0006] It is believed that blending a semi-solid oil with a melting point close to body temperature, in other words a low melting point, into a water-in-oil emulsion cosmetic can provide a melting sensation when applied to the skin, but blending a large amount of semi-solid oil poses the problem of the product becoming heavy when applied. After extensive research, the inventors found that in order to blend a semi-solid oil in a way that gives the product a melting sensation, the ratio of the semi-solid oil to the polar oil and non-volatile oil is extremely important.

[0007] The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a water-in-oil emulsion cosmetic which blends well with the skin when applied and has a melting sensation when used. [Means for solving the problem]

[0008] The water-in-oil emulsion cosmetic of the present invention comprises: (A) a semi-solid oil having a melting point of 28 to 40°C, in an amount of 3 to 10% by mass based on the total amount of the cosmetic; (B) a polar oil; (C) non-volatile oil (excluding (B) polar oil); A water-in-oil emulsion cosmetic comprising: The mass ratio of the semi-solid oil (A) to the polar oil (B) is 0.4 to 0.9; The mass ratio of the (A) semi-solid oil to the total amount of the (B) polar oil and the (C) non-volatile oil is 0.2 to 0.5.

[0009] The content of the (B) polar oil is preferably 5 to 20% by mass based on the total amount of the cosmetic.

[0010] (B) The polar oil preferably contains an ultraviolet absorber.

[0011] (A) The semi-solid oil preferably has two or more ester bonds in one molecule.

[0012] (A) The semi-solid oil is preferably a pentaerythritol fatty acid ester.

[0013] The pentaerythritol fatty acid ester is preferably dipentaerythrityl hexahydroxystearate or pentaerythrityl tetra(behenate / benzoate / ethylhexanoate).

[0014] The water-in-oil emulsion cosmetic of the present invention preferably has a viscosity at 25°C of 10,000 to 300,000 mPa·s. Effect of the Invention

[0015] The water-in-oil emulsion cosmetic of the present invention comprises: (A) a semi-solid oil having a melting point of 28 to 40°C, in an amount of 3 to 10% by mass based on the total amount of the cosmetic; (B) a polar oil; (C) non-volatile oil (excluding (B) polar oil); A water-in-oil emulsion cosmetic comprising: The mass ratio of the semi-solid oil (A) to the polar oil (B) is 0.4 to 0.9; Since the mass ratio of the semi-solid oil (A) to the total amount of the polar oil (B) and the non-volatile oil (C) is 0.2 to 0.5, the oil blends well with the skin when applied, and has a melting sensation when used. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The water-in-oil emulsion cosmetic of the present invention comprises: (A) a semi-solid oil having a melting point of 28 to 40°C, in an amount of 3 to 10% by mass based on the total amount of the cosmetic; (B) a polar oil; (C) non-volatile oil (excluding (B) polar oil); A water-in-oil emulsion cosmetic comprising: The mass ratio of the semi-solid oil (A) to the polar oil (B) is 0.4 to 0.9; The mass ratio of the (A) semi-solid oil to the total amount of the (B) polar oil and the (C) non-volatile oil is 0.2 to 0.5. Each component will be described in detail below. In this specification, PEG stands for polyethylene glycol, PPG stands for polypropylene glycol, EO stands for ethylene oxide, PO stands for propylene oxide, POE stands for polyoxyethylene, POP stands for polyoxypropylene, VP stands for vinylpyrrolidone, and BG stands for butylene glycol.

[0017] (A) Semi-solid oil with a melting point of 28-40°C The water-in-oil emulsion cosmetic of the present invention contains (A) a semi-solid oil having a melting point of 28 to 40° C. (hereinafter simply referred to as (A) semi-solid oil) in an amount of 3 to 10 mass % based on the total mass of the cosmetic. (A) Semi-solid oils preferably have two or more ester bonds in one molecule. Examples of semi-solid oils having two or more ester bonds in one molecule include pentaerythritol fatty acid esters, dipentaerythrityl tetra(hydroxystearic acid / isostearic acid), dipentaerythrityl hexahydroxystearic acid, bisdiglyceryl polyacyladipate-2, phytosteryl / behenyl dimer dilinoleic acid, phytosteryl macadamiate, and shea butter. The pentaerythritol fatty acid ester is preferably dipentaerythrityl hexahydroxystearate or pentaerythrityl tetra(behenic acid / benzoic acid / ethylhexanoic acid). (A) The semi-solid oil may be used alone or in combination of two or more kinds.

[0018] The blending amount of (A) semi-solid oil is 3 to 10 mass% of the total cosmetic, more preferably 3.5 to 9 mass%, and further desirably 4 to 8.5 mass%. When the blending amount of (A) component is 3 mass% or more, it is possible to obtain a cosmetic that blends well with the skin when applied and has a melting feeling when used, and when the blending amount is 10 mass% or less, it is possible to obtain a cosmetic that is light and comfortable to wear.

[0019] (B) Polar oil (B) Polar oil is not particularly limited as long as it is normally used in cosmetics, medicines, and foods. The IOB value is not particularly limited, but is preferably 0.05 to 0.80. The IOB value is an abbreviation for Inorganic / Organic Balance, which is a value that represents the ratio of inorganic values ​​to organic values, and is an index that indicates the degree of polarity of an organic compound. IOB value = inorganic value / organic value Here, for each of the "inorganic value" and "organic value", for example, the "organic value" for one carbon atom in a molecule is 20, and the "inorganic value" for one hydroxyl group in the molecule is 100, the "inorganic value" and "organic value" are set according to various atoms or functional groups, and the IOB value of an organic compound can be calculated by integrating the "inorganic value" and "organic value" of all atoms and functional groups in the organic compound (see, for example, Fujita, "Chemical Region", Vol. 11, No. 10, pp. 719-725, 1957).

[0020] Representative examples of polar oils include ester oils and ultraviolet absorbers. Specific examples of ester oils include tripropylene glycol dineopentanoate, isononyl isononanoate, isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearate, cetyl ethylhexanoate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, glycerin di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, tetra-2- Pentaerythrityl ethylhexanoate, triethylhexanoin (tri-2-ethylhexanoic acid glycerin), trioctanoic acid glycerin, triisopalmitic acid glycerin, triisostearate trimethylolpropane, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, trimyristate glycerin, tri-2-heptylundecanoic acid glyceride, castor oil fatty acid methyl ester, oleyl oleate, acetoglyceryl amide, 2-heptylundecyl palmitate, diisobutyl adipate, N-lauroyl-L-glutamic acid-2-octyldodecyl ester, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, 2-ethylhexyl succinate, and triethyl citrate.

[0021] The ultraviolet absorbent may be a wide variety of oil-based ultraviolet absorbents with high polarity that are generally used in cosmetics, and is not particularly limited. For example, benzoic acid derivatives, salicylic acid derivatives, cinnamic acid derivatives, dibenzoylmethane derivatives, β,β-diphenylacrylate derivatives, benzophenone derivatives, benzylidene camphor derivatives, phenylbenzimidazole derivatives, triazine derivatives, phenylbenzotriazole derivatives, anthranil derivatives, imidazoline derivatives, benzalmalonate derivatives, 4,4-diarylbutadiene derivatives, etc. are exemplified below. Specific examples and trade names are listed below, but are not limited thereto.

[0022] Examples of benzoic acid derivatives include ethyl para-aminobenzoate (PABA), ethyl-dihydroxypropyl PABA, ethylhexyl-dimethyl PABA (e.g., "Escarol 507"; ISP), glyceryl PABA, PEG-25-PABA (e.g., "Uvinal P25"; BASF), and diethylaminohydroxybenzoylhexylbenzoate (e.g., "Uvinal A Plus"), etc.

[0023] Examples of salicylic acid derivatives include homosalate (e.g., "Eusolex HMS"; Rona / EM Industries), ethylhexyl salicylate (e.g., "NeoHeliopan OS"; Herman & Reimer), dipropylene glycol salicylate (e.g., "Dipsal"; Skel), and TEA salicylate (e.g., "NeoHeliopan TS"; Herman & Reimer).

[0024] Examples of cinnamic acid derivatives include octyl methoxycinnamate or ethylhexyl methoxycinnamate (e.g., Parsol MCX; Hoffmann-La Roche), isopropyl methoxycinnamate, isoamyl methoxycinnamate (e.g., Neo-Heliopan E1000; Herman & Reimer), cinnoxate, DEA methoxycinnamate, diisopropyl methylcinnamate, glyceryl-ethylhexanoate-dimethoxycinnamate, and di-(2-ethylhexyl)-4'-methoxybenzalmalonate. Examples of dibenzoylmethane derivatives include 4-tert-butyl-4'-methoxydibenzoylmethane (eg, Parsol 1789).

[0025] An example of a β,β-diphenylacrylate derivative is octocrylene (eg, "Uvinal N539"; BASF). Examples of benzophenone derivatives include benzophenone-1 (e.g., "Uvinal 400"; BASF), benzophenone-2 (e.g., "Uvinal D50"; BASF), benzophenone-3 or oxybenzone (e.g., "Uvinal M40"; BASF), benzophenone-4 (e.g., "Uvinal MS40"; BASF), benzophenone-5, benzophenone-6 (e.g., "Helisorb 11"; Norquay), benzophenone-8 (e.g., "Spectra-Sorb UV-24"; American Cyanamid), benzophenone-9 (e.g., "Uvinal DS-49"; BASF), and benzophenone-12.

[0026] Examples of benzylidene camphor derivatives include 3-benzylidene camphor (e.g., "Mexoryl SD"; Symex), 4-methylbenzylidene camphor, benzylidene camphorsulfonic acid (e.g., "Mexoryl SL"; Symex), benzalkonium camphor methosulfate (e.g., "Mexoryl SO"; Symex), terephthalide discamphorsulfonic acid (e.g., "Mexoryl SX"; Symex), and polyacrylamide methyl benzylidene camphor (e.g., "Mexoryl SW"; Symex). Examples of phenylbenzimidazole derivatives include phenylbenzimidazole sulfonic acid (eg, "Eutholex 232"; Merck), and disodium phenyldibenzimidazole tetrasulfonate (eg, "Neo-Heliopan AP"; Herman & Reimer).

[0027] Examples of triazine derivatives include anisotriazine (e.g., "Tinosorb S"; Ciba Specialty Chemicals), ethylhexyl triazone (e.g., "Uvinal T150"; BASF), diethylhexylbutamidotriazone (e.g., "Uvasorb HEB"; Sigma 3V), and 2,4,6-tris(diisobutyl-4'-aminobenzalmalonate)-s-triazine.

[0028] Examples of phenylbenzotriazole derivatives include drometrizole trisiloxane (eg, "Silatrizole"; Rhodia-Chemie), methylene bis(benzotriazolyl tetramethylbutylphenol) (eg, "Tinosorb M"; Ciba Specialty Chemicals), and the like.

[0029] Examples of anthranil derivatives include menthyl anthranilate (eg, "Neo Heliopan MA"; Herman & Reimer). The imidazoline derivatives include ethylhexyldimethoxybenzylidene dioxoimidazoline propionate.

[0030] Examples of benzalmalonate derivatives include polyorganosiloxanes having benzalmalonate functional groups (for example, polysilicone-15; "Parsol SLX"; DSM Nutrition Japan). An example of a 4,4-diarylbutadiene derivative is 1,1-dicarboxy(2,2'-dimethylpropyl)-4,4-diphenylbutadiene. The (B) polar oil may be used alone or in combination of two or more kinds.

[0031] The blending amount of (B) polar oil is preferably 5 to 20 mass% based on the total amount of the cosmetic, preferably 6 to 18 mass%, more preferably 7 to 17 mass%. The blending amount of the ultraviolet absorber contained in the polar oil is preferably 20 mass% or more, preferably 30 mass% or more, more preferably 40 mass% or more of the polar oil, and all of the polar oil may be ultraviolet absorbers. By making the polar oil 5 mass% or more, the skin can be made to look plumper and smoother, and the skin protection effect can be further enhanced. In addition, by making it 20 mass% or less, stickiness can be further suppressed.

[0032] (C) Non-volatile oil (C) Non-volatile oils are oils that remain on the skin at room temperature and atmospheric pressure; more specifically, non-volatile oils have an evaporation rate of 0.01 mg / cm 2 / min. In the present invention, the (B) polar oil is excluded from the (C) non-volatile oil. Examples of the (C) non-volatile oil include non-volatile hydrocarbon oils and silicone oils.

[0033] Hydrocarbon oils of plant origin include, for example, argan oil, avocado oil, baobab oil, canola oil, rapeseed oil, palm oil, jojoba oil, olive oil, castor oil, and mixtures thereof.

[0034] Linear or branched hydrocarbons of mineral or synthetic origin include, for example, liquid paraffins and their derivatives, polydecenes, polybutenes, hydrogenated polyisobutenes, such as Parleam.

[0035] Also preferred are fatty alcohols that are liquid at room temperature and contain a branched and / or unsaturated carbon chain having 12 to 26 carbon atoms, such as 2-octyldodecanol, isostearyl alcohol, oleic alcohol, 2-hexyldecanol, 2-butyloctanol, and 2-undecylpentadecanol.

[0036] Also usable are higher C12 to C22 fatty acids, such as oleic acid, linoleic acid, linolenic acid, and mixtures thereof. Mention may also be made of dialkyl carbonates, in which the two alkyl chains may be the same or different, such as dicaprylyl carbonate sold under the name CETIOL CC® by the company COGNIS.

[0037] Silicone oils include, for example, non-volatile linear or cyclic polydimethylsiloxanes (PDMS); polydimethylsiloxanes containing alkyl, alkoxy or phenyl groups having 2 to 24 carbon atoms pendant or at the end of the silicone chain; phenylated silicones such as phenyltrimethicone, phenyldimethicone, phenyltrimethylsiloxydiphenylsiloxane, diphenyldimethicone, diphenylmethyldiphenyl-trisiloxane or (2-phenylethyl)trimethylsiloxysilicate, and mixtures thereof.

[0038] In the water-in-oil emulsion cosmetic of the present invention, the mass ratio of the semi-solid oil (A) to the polar oil (B) [semi-solid oil (A) / polar oil (B)] is 0.4 to 0.9, and more preferably 0.5 to 0.8. Note that semi-solid oils may be non-volatile oils or polar oils, but semi-solid oils (A) with a melting point of 28 to 40°C are not included in non-volatile oils or polar oils. By setting the mass ratio of the semi-solid oil (A) to the polar oil (B) in the range of 0.4 to 0.9, the cosmetic blends well with the skin when applied to the skin and has a melting sensation when used.

[0039] In the water-in-oil emulsion cosmetic of the present invention, the mass ratio of the (A) semi-solid oil [(A) semi-solid oil / ((B) polar oil + (C) non-volatile oil]] to the total amount of the (B) polar oil and the (C) non-volatile oil is 0.2 to 0.5, and more preferably 0.3 to 0.4. Here, it is desirable that the (C) non-volatile oil has an evaporation rate of 0.01 mg / cm as described above. 2 Although the oil satisfies this condition, if it is a polar oil, it is not included in (C) non-volatile oil. By having the mass ratio of (A) semi-solid oil to the total amount of (B) polar oil and (C) non-volatile oil be 0.2 to 0.5, the oil can be applied to the skin with good affinity and with a melting sensation.

[0040] The water-in-oil emulsion cosmetic of the present invention preferably has a viscosity of 10,000 to 300,000 mPa·s at 25°C. Here, the viscosity is a value measured at 25°C using a BL type viscometer with a rotor No. 4, at 12 rpm, and for 1 minute. The viscosity at 25°C is more preferably 12,000 to 200,000 mPa·s, further preferably 13,000 to 100,000 mPa·s, and particularly preferably 14,000 to 50,000 mPa·s. A viscosity at 25°C of 10,000 mPa·s or more can improve stability, while a viscosity of 300,000 mPa·s or less can provide a light spread during application and a better feel when used.

[0041] The aqueous phase component of the water-in-oil emulsion cosmetic of the present invention is composed mainly of water and contains various water-soluble components, and is preferably blended in the water-in-oil emulsion cosmetic of the present invention at 30 to 80% by mass, more preferably 35% by mass or more and less than 70% by mass. By blending it at 30% by mass or more, a more refreshing feeling can be achieved, and by blending it at 80% by mass or less, the stability can be further improved.

[0042] In addition to the above-mentioned components, the water-in-oil emulsion cosmetic of the present invention can contain one or more components that are commonly used in cosmetics and quasi-drugs, such as moisturizers, powder components, surfactants, thickeners, sugars, medicines, etc. Examples of components that can be added are given below.

[0043] 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, sodium lactate, bile salts, dl-pyrrolidone carboxylate, short-chain soluble collagen, diglycerin (EO)PO adduct, Rosa rugosa extract, Achillea millefolium extract, and Melilot extract.

[0044] Examples of the powder component include inorganic powders (e.g., talc, kaolin, mica, sericite, white mica, gold mica, synthetic mica, red mica, black mica, permiculite, magnesium carbonate, calcium carbonate, aluminum silicate, barium silicate, calcium silicate, magnesium silicate, strontium silicate, tungstate metal salts, magnesium, silica, zeolite, barium sulfate, calcined calcium sulfate (calcined gypsum), calcium phosphate, fluorapatite, hydroxyapatite, ceramic powder, etc.) wood, metal soaps (e.g. zinc myristate, calcium palmitate, aluminum stearate), boron nitride, etc.); organic powders (e.g. polyamide resin powder (nylon powder), polyethylene powder, polymethyl methacrylate powder, polystyrene powder, styrene-acrylic acid copolymer resin powder, benzoguanamine resin powder, polytetrafluoroethylene powder, cellulose powder, etc.); inorganic white pigments (e.g. zinc oxide, etc.); inorganic red pigments (e.g. iron titanate, etc.); inorganic purple pigments (e.g. mango violet, cobalt violet, etc.); inorganic green pigments (e.g. chromium oxide, chromium hydroxide, cobalt titanate, etc.); inorganic blue pigments (e.g. ultramarine, Prussian blue, etc.); pearl pigments (e.g. titanium oxide coated mica, titanium oxide coated bismuth oxychloride, titanium oxide coated talc, colored titanium oxide coated mica, bismuth oxychloride, fish scale foil, etc.); metal powder pigments (e.g. aluminum powder, copper powder, etc.); organic pigments such as zirconium, barium or aluminum lake (e.g. For example, organic pigments such as Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 228, Red No. 405, Orange No. 203, Orange No. 204, Yellow No. 205, Yellow No. 401, and Blue No. 404; Red No. 3, Red No. 104, Red No. 106, Red No. 227, Red No. 230, Red No. 401, Red No. 505, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No. 203, Green No. 3, and Blue No. 1; natural pigments (e.g., chlorophyll, β-carotene, etc.), and the like.

[0045] The powder may be a powder that has been surface-treated with various surface treatment agents. The surface-treated powder may be a surface-treated powder that has been previously surface-treated and dried (a surface-treated powder produced in a process separate from the cosmetic production process, for example, a commercially available product, etc.). Alternatively, a cosmetic similar to that produced using a surface-treated powder that has been previously surface-treated and dried may be produced by incorporating a surface treatment process for powder into the cosmetic production process without using a commercially available product, etc. When surface treatment is performed during the cosmetic production process, the surface treatment is performed by dissolving the surface treatment agent in a heated poor solvent, adding the powder, and cooling the powder, and then proceeding directly to a normal cosmetic production process without removing the poor solvent. Examples of the powder that can be surface-treated during such a cosmetic production process include, but are not limited to, zinc oxide treated with dextrin palmitate and zinc oxide treated with octyltriethoxysilane.

[0046] Furthermore, the water-in-oil emulsion cosmetic of the present invention may contain various types of surfactants as emulsifiers. Examples of anionic surfactants include fatty acid soaps (e.g., sodium laurate, sodium palmitate, etc.); higher alkyl sulfates (e.g., sodium lauryl sulfate, potassium lauryl sulfate, etc.); alkyl ether sulfates (e.g., POE-lauryl triethanolamine sulfate, sodium POE-lauryl sulfate, etc.); N-acylsarcosinates (e.g., sodium lauroyl sarcosinate, etc.); higher fatty acid amide sulfonates (e.g., sodium N-myristoyl-N-methyl taurine, sodium coconut oil fatty acid methyl tauride, sodium lauryl methyl tauride, etc.); phosphates (sodium POE-oleyl ether phosphate, sodium POE-stearyl ether phosphate, etc.); sulfosuccinates (e.g., sodium di-2-ethylhexyl sulfosuccinate, sodium monolauroyl monoethanolamide polyoxyethylene sulfosuccinate, sodium lauryl polypropylene glycol ... sodium succinate, etc.); alkylbenzene sulfonates (e.g., sodium linear dodecylbenzene sulfonate, triethanolamine linear dodecylbenzene sulfonate, linear dodecylbenzene sulfonic acid, etc.); higher fatty acid ester sulfate salts (e.g., sodium hydrogenated coconut oil fatty acid glycerin sulfate, etc.); N-acyl glutamates (e.g., monosodium N-lauroyl glutamate, disodium N-stearoyl glutamate, monosodium N-myristoyl-L-glutamate, etc.); sulfated oils (e.g., turmeric oil, etc.); POE-alkyl ether carboxylic acids; POE-alkyl allyl ether carboxylates; α-olefin sulfonates; higher fatty acid ester sulfonates; secondary alcohol sulfate salts; higher fatty acid alkylolamide sulfate salts; sodium lauroyl monoethanolamide succinate; ditriethanolamine N-palmitoyl aspartate; sodium caseinate, etc.

[0047] Examples of cationic surfactants include alkyltrimethylammonium salts (e.g., stearyltrimethylammonium chloride, lauryltrimethylammonium chloride, etc.); alkylpyridinium salts (e.g., cetylpyridinium chloride, etc.); distearyldimethylammonium chloride, dialkyldimethylammonium salts; poly(N,N'-dimethyl-3,5-methylenepiperidinium chloride); alkyl quaternary ammonium salts; alkyldimethylbenzylammonium salts; alkylisoquinolinium salts; dialkylmorphonium salts; POE-alkylamines; alkylamine salts; polyamine fatty acid derivatives; amyl alcohol fatty acid derivatives; benzalkonium chloride; benzethonium chloride, etc.

[0048] Examples of amphoteric surfactants include imidazoline-based amphoteric surfactants (e.g., 2-undecyl-N,N,N-(hydroxyethylcarboxymethyl)-2-imidazoline sodium, 2-cocoyl-2-imidazolinium hydroxide-1-carboxyethyloxy disodium salt, etc.); betaine-based surfactants (e.g., 2-heptadecyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, lauryl dimethylaminoacetic acid betaine, alkyl betaine, amido betaine, sulfobetaine, etc.).

[0049] Examples of lipophilic nonionic surfactants include sorbitan fatty acid esters (e.g., sorbitan monooleate, sorbitan monoisostearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquioleate, sorbitan trioleate, diglycerol sorbitan penta-2-ethylhexyl acid, diglycerol sorbitan tetra-2-ethylhexyl acid, etc.); glycerin polyglycerin fatty acids (e.g., glycerin monocottonseed oil fatty acid, glycerin monoerucate, glycerin sesquioleate, glycerin monostearate, α,α'-oleic acid pyroglutamic acid, glycerin monostearate malic acid, etc.); propylene glycol fatty acid esters (e.g., propylene glycol monostearate, etc.); hydrogenated castor oil derivatives; and glycerin alkyl ethers.

[0050] Examples of hydrophilic nonionic surfactants include POE-sorbitan fatty acid esters (e.g., POE-sorbitan monooleate, POE-sorbitan monostearate, POE-sorbitan monooleate, POE-sorbitan tetraoleate, etc.); POE sorbit fatty acid esters (e.g., POE-sorbitan monolaurate, POE-sorbitan monooleate, POE-sorbitan pentaoleate, POE-sorbitan monostearate, etc.); POE-glycerin fatty acid esters (e.g., POE-glycerin monostearate, POE-monooleates such as POE-glycerol monoisostearate, POE-glycerol triisostearate, etc.; POE-fatty acid esters (e.g., POE-distearate, POE-monodioleate, ethylene glycol distearate, etc.); POE-alkyl ethers (e.g., POE-lauryl ether, POE-oleyl ether, POE-stearyl ether, POE-behenyl ether, POE-2-octyldodecyl ether, POE-cholestanol ether, etc.); Pluronic types (e.g., Pluronic (registered trademark) registered trademarks, etc.); POE·POP-alkyl ethers (e.g., POE·POP-cetyl ether, POE·POP-2-decyltetradecyl ether, POE·POP-monobutyl ether, POE·POP-hydrogenated lanolin, POE·POP-glycerin ether, etc.); tetraPOE·tetraPOP-ethylenediamine condensates (e.g., Tetronic, etc.); POE-castor oil hydrogenated castor oil derivatives (e.g., POE-castor oil, POE-hydrogenated castor oil, POE-hydrogenated castor oil monoisostearate, POE-hydrogenated castor oil triisostearate, POE-hydrogenated castor oil monopyroglutamic acid monoisostearate diester, POE-hydrogenated castor oil maleic acid, etc.); POE-beeswax and lanolin derivatives (e.g., POE-sorbitol beeswax, etc.); alkanolamides (e.g., coconut oil fatty acid diethanolamide, lauric acid monoethanolamide, fatty acid isopropanolamide, etc.); POE-propylene glycol fatty acid esters; POE-alkylamines; POE-fatty acid amides; sucrose fatty acid esters; alkylethoxydimethylamine oxide; trioleyl phosphate, etc.

[0051] Examples of thickeners include plant-based polymers such as gum arabic, tragacanth, galactan, carob gum, guar gum, karaya gum, carrageenan, xanthan gum, pectin, agar, quince seed, and algae colloid (brown algae extract); microbial polymers such as dextran, succinoglucan, and pullulan; animal polymers such as collagen, casein, albumin, and gelatin; cellulose-based polymers such as methylcellulose, nitrocellulose, ethylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, sodium cellulose sulfate, hydroxypropylcellulose, sodium carboxymethylcellulose, crystalline cellulose, and cellulose powder; and alginic acid-based polymers such as sodium alginate and propylene glycol alginate.

[0052] Further, vinyl polymers such as polyvinyl methyl ether and carboxyvinyl polymer, polyoxyethylene polymers, polyoxyethylene polyoxypropylene copolymer polymers, acrylic polymers such as polyethyl acrylate and polyacrylamide, polyethyleneimine, cationic polymers, bentonite, magnesium aluminum silicate, laponite, hectorite, inorganic water-soluble polymers such as silicic anhydride, PEG-240 / decyltetradeceth-20 / hexamethylene diisocyanate copolymer, (dimethylacrylamide / Na acryloyldimethyltaurate) crosspolymer, (Na acrylate / acryloyldimethyltaurate) copolymer, (alkyl acrylate / steareth-20 methacrylate) copolymer, (ammonium acryloyldimethyltaurate / VP) copolymer, dextrin, sodium pectinate, sodium alginate, dialkyldimethylammonium cellulose sulfate, magnesium aluminum silicate, bentonite, hectorite, magnesium silicate A1 (Veegum), laponite, silicic anhydride, etc.

[0053] Examples of monosaccharides include trioses (e.g., D-glyceryl aldehyde, dihydroxyacetone, etc.); tetraoses (e.g., D-erythrose, D-erythrulose, D-threose, etc.); pentoses (e.g., L-arabinose, D-xylose, L-lyxose, D-arabinose, D-ribose, D-ribulose, D-xylulose, L-xylulose, etc.); hexoses (e.g., D-glucose, D-talose, D-busicose, D-galactose, D-fructose, L-galactose, L-mannoside, etc.); heptose, D-tagatose, etc.); heptose (e.g., aldoheptose, heptose, etc.); octose (e.g., octose, etc.); deoxy sugars (e.g., 2-deoxy-D-ribose, 6-deoxy-L-galactose, 6-deoxy-L-mannose, etc.); amino sugars (e.g., D-glucosamine, D-galactosamine, sialic acid, aminouronic acid, muramic acid, etc.); uronic acids (e.g., D-glucuronic acid, D-mannuronic acid, L-guluronic acid, D-galacturonic acid, L-iduronic acid, etc.), etc.

[0054] Examples of oligosaccharides include sucrose, gunthianose, umbelliferose, lactose, planteose, isolichinoses, α,α-trehalose, raffinose, lychinoses, umbilicin, stachyose, verbascoses, and the like.

[0055] Examples of the amino acid include neutral amino acids (e.g., threonine, cysteine, etc.), basic amino acids (e.g., hydroxylysine, etc.), etc. Examples of the amino acid derivatives include sodium acyl sarcosine (sodium lauroyl sarcosine), acyl glutamate, sodium acyl β-alanine, glutathione, pyrrolidone carboxylic acid, etc.

[0056] Examples of the organic amine include monoethanolamine, diethanolamine, triethanolamine, morpholine, triisopropanolamine, 2-amino-2-methyl-1,3-propanediol, and 2-amino-2-methyl-1-propanol.

[0057] Examples of alkylene oxide derivatives include POE(9)POP(2) dimethyl ether, POE(14)POP(7) dimethyl ether, POE(10)POP(10) dimethyl ether, POE(6)POP(14) dimethyl ether, POE(15)POP(5) dimethyl ether, POE(25)POP(25) dimethyl ether, POE(7)POP(12) dimethyl ether, POE(22)POP(40) dimethyl ether, and POE(35)POP(40) dimethyl. POE(50)POP(40) dimethyl ether, POE(55)POP(30) dimethyl ether, POE(30)POP(34) dimethyl ether, POE(25)POP(30) dimethyl ether, POE(27)POP(14) dimethyl ether, POE(55)POP(28) dimethyl ether, POE(36)POP(41) dimethyl ether, POE(7)POP(12) dimethyl ether, POE(17)POP(4) dimethyl ether, and the like.

[0058] Examples of sequestering agents include 1-hydroxyethane-1,1-diphosphonic acid, 1-hydroxyethane-1,1-diphosphonic acid tetrasodium salt, disodium edetate, trisodium edetate, tetrasodium edetate, sodium citrate, sodium polyphosphate, sodium metaphosphate, gluconic acid, phosphoric acid, citric acid, ascorbic acid, succinic acid, edetic acid, and trisodium ethylenediaminehydroxyethyltriacetate.

[0059] Examples of the antioxidant aid include phosphoric acid, citric acid, ascorbic acid, maleic acid, malonic acid, succinic acid, fumaric acid, cephalin, hexametaphosphate, phytic acid, and ethylenediaminetetraacetic acid.

[0060] Other possible ingredients include, for example, preservatives (ethylparaben, butylparaben, etc.); skin whitening agents (for example, placenta extract, saxifrage extract, ascorbic acid or its derivatives, tranexamic acid, arbutin, etc.); blood circulation promoters (nicotinic acid, benzyl nicotinate, tocopherol nicotinate, β-butoxy nicotinate, minoxidil or its analogs, γ-oryzanol, alkoxycarbonylpyridine N-oxide, carpronium chloride, and acetylcholine or its derivatives, etc.). ; various extracts (e.g., ginger, Uba, Coptis Root, Lithospermum Root, Birch, Loquat, Carrot, Aloe, Mallow, Iris, Grape, Loofah, Lily, Saffron, Cnidium Root, Angelica Root, Hypericum, Ononis, Garlic, Chili Pepper, Tangerine Peel, Angelica Root, Peony, Seaweed, etc.), activators (e.g., panthenyl ethyl ether, nicotinamide, biotin, pantothenic acid, royal jelly, cholesterol derivatives, etc.); antiseborrheic agents (e.g., pyridoxines, thianthol, etc.), etc.

[0061] Specific examples of the form of the water-in-oil emulsion cosmetic of the present invention include milky lotion, skin care cream, hair cream, liquid foundation, eyeliner, mascara, eyeshadow, and other milky or creamy products, which are produced from the above-mentioned components by conventional methods. EXAMPLES

[0062] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples. In the following examples, the blend amounts are expressed in mass % unless otherwise specified. Water-in-oil emulsion cosmetics having the compositions shown in Table 1 below were prepared by conventional methods and evaluated according to the following criteria.

[0063] (viscosity) The viscosity of the prepared water-in-oil emulsion cosmetic was measured at 25° C. using a BL type viscometer (VS-A type, manufactured by Shibaura Systems) under the measurement conditions of rotor No. 4, 12 rpm, and 1 minute.

[0064] (Melting sensation) The melting sensation when applied to the prepared water-in-oil emulsion cosmetics was evaluated by a panel of three experts based on a comprehensive evaluation. The evaluation criteria were as follows: <Evaluation criteria> A: I really feel it melting. B: I feel a slight melting sensation. C: I don't feel much melting sensation. D: No melting sensation at all

[0065] (Skin-friendly) The prepared water-in-oil emulsion cosmetics were evaluated for their compatibility with the skin when applied by three expert panelists using a comprehensive evaluation method. The evaluation criteria were as follows: <Evaluation criteria> A: Very good skin compatibility B: Good compatibility with skin C: Not compatible with skin

[0066] Details of the raw material product names etc. in the table are as follows: Volatile dimethicone: Silicone KF-96L-2CS Dipentaerythrityl hexahydroxystearate: Cosmol 168M (melting point 30-45°C) Hydrogenated palm oil, palm kernel, and palm oil blend: Triphat PS-45H (melting point 46.8°C) Vaseline: Vaseline E (melting point 48-60℃) Pentaerythrityl tetra(behenate / benzoate / ethylhexanoate): Salacos P-B822 (melting point around 37°C)

[0067] [Table 1]

[0068] As shown in the table, the water-in-oil emulsion cosmetic of Example 1 had a melting feel when used and was well-suited to the skin. Comparative Example 1 was an example in which (A) semi-solid oil was 2% by mass, and Comparative Example 2 was an example in which (A) semi-solid oil was omitted, but neither of them had a melting feel when used. Comparative Example 3 was an example in which no polar oil was included, and Comparative Example 4 was an example in which the ratio of (A) semi-solid oil to (B) polar oil was greater than 0.9, but these also did not have a melting feel when used. Example 2 was an example in which (A) semi-solid oil was 6% by mass, and in this case, a melting feel was obtained and the cosmetic was well-suited to the skin, but Comparative Example 5 in which (A) semi-solid oil was 8% by mass was used had a melting feel when used, and both the ratio of (A) semi-solid oil to (B) polar oil and the ratio of (A) semi-solid oil to the total amount of (B) polar oil and (C) non-volatile oil were outside the range of the present invention, and therefore no melting feel was obtained when used.

[0069] In Example 3, the semi-solid oil used in Example 1 was changed from pentaerythrityl tetra(behenate / benzoate / ethylhexanoate) to dipentaerythrityl hexahydroxystearate, and a melting sensation was obtained and the oil blended well with the skin. On the other hand, in Comparative Example 6, the semi-solid oil was changed to a mixed oil of hydrogenated palm oil, palm kernel, and palm oil with a melting point of 46.8°C, and in Comparative Example 7, the oil was changed to petrolatum with a melting point of 48-60°C, but the melting sensation was not obtained, and the cosmetic did not adhere well to the skin, resulting in a slippery sensation. Some embodiments of the present disclosure are described in [Item 1] to [Item 7] below. [Item 1] (A) a semi-solid oil having a melting point of 28 to 40°C, in an amount of 3 to 10% by mass based on the total amount of the cosmetic; (B) a polar oil; (C) a non-volatile oil (excluding the polar oil (B) above); A water-in-oil emulsion cosmetic comprising: The mass ratio of the (A) semi-solid oil to the (B) polar oil is 0.4 to 0.9; A water-in-oil emulsion cosmetic, in which the mass ratio of the (A) semi-solid oil to the total amount of the (B) polar oil and the (C) non-volatile oil is 0.2 to 0.5. [Item 2] 2. The water-in-oil emulsion cosmetic according to item 1, wherein the content of the (B) polar oil is 5 to 20% by mass based on the total amount of the cosmetic. [Item 3] 3. The water-in-oil emulsion cosmetic according to item 1 or 2, wherein the (B) polar oil contains an ultraviolet absorber. [Item 4] 4. The water-in-oil emulsion cosmetic according to item 1, 2 or 3, wherein the semi-solid oil (A) has two or more ester bonds in one molecule. [Item 5] 5. The water-in-oil emulsion cosmetic according to Item 4, wherein the (A) semi-solid oil is a pentaerythritol fatty acid ester. [Item 6] 6. The water-in-oil emulsion cosmetic according to item 5, wherein the pentaerythritol fatty acid ester is dipentaerythrityl hexahydroxystearate or pentaerythrityl tetra(behenate / benzoate / ethylhexanoate). [Item 7] 7. The water-in-oil emulsion cosmetic according to any one of items 1 to 6, having a viscosity at 25° C. of 10,000 to 300,000 mPa s.

Claims

1. (A) a semi-solid oil having a melting point of 28 to 40°C, in an amount of 3 to 10% by mass relative to the total amount of the cosmetic; (B) a polar oil; and (C) a non-volatile oil (excluding the polar oil (B) above); A water-in-oil emulsion cosmetic comprising: The semi-solid oil (A) has two or more ester bonds in one molecule, The mass ratio of the semi-solid oil (A) to the polar oil (B) is 0.4 to 0.9; The mass ratio of the semi-solid oil (A) to the total amount of the polar oil (B) and the non-volatile oil (C) is 0.2 to 0.5; Water-in-oil emulsion cosmetics.

2. 2. The water-in-oil emulsion cosmetic according to claim 1, wherein the content of the polar oil (B) is 5 to 20% by mass based on the total amount of the cosmetic.

3. The water-in-oil emulsion cosmetic according to claim 1 or 2, wherein the polar oil (B) contains an ultraviolet absorbing agent.

4. The water-in-oil emulsion cosmetic according to any one of claims 1 to 3, wherein the semi-solid oil (A) is a pentaerythritol fatty acid ester.

5. 5. The water-in-oil emulsion cosmetic according to claim 4, wherein the pentaerythritol fatty acid ester is dipentaerythrityl hexahydroxystearate or pentaerythrityl tetra(behenate / benzoate / ethylhexanoate).

6. The water-in-oil emulsion cosmetic according to any one of claims 1 to 5, having a viscosity at 25°C of 10,000 to 300,000 mPa·s.

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