Water-in-oil composition

Abstract

This oil-in-water type composition contains (A) 0.02-0.25 mass% of a water-soluble polymer, (B) 0.2-2.5 mass% of at least one selected from the group consisting of sugars and sugar alcohols, which are solid at 25°C under atmospheric pressure, (C) water, (D) a first powder in which the particle surfaces thereof are hydrophobic, (E) a second powder in which the particle surfaces thereof are hydrophilic, and (F) an oily component. Component (A) is at least one selected from the group consisting of polyacrylic acid, poly(2-acrylamide-2-methylpropanesulfonic acid), and salts thereof. Component (E) exhibits a linseed oil absorption amount of 170 ml or less per 100 g at 25°C.

Description

Related Applications

[0001] The present invention is based on the priority claim of Japanese Patent Application No. 2020-176847 (filed October 21, 2020), the entire contents of which are incorporated herein by reference. [Technical Field]

[0002] The present disclosure relates to water-in-oil compositions. [Background technology]

[0003] Water-in-oil compositions are used, for example, in external skin preparations such as sunscreen cosmetics (see, for example, Patent Document 1). Patent Document 1 describes a water-in-oil sunscreen cosmetic that contains a volatile component, an organically modified clay mineral, and a spherical resin powder, but does not contain an ultraviolet absorber. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 9-255544 Summary of the Invention [Problem to be solved by the invention]

[0005] The following analysis is given in light of the present disclosure.

[0006] Some sunscreen cosmetics contain powders as UV scattering agents. In these sunscreen cosmetics, a large amount of UV scattering agent may be added to enhance the UV protection effect. However, when a water-in-oil composition containing a high content of hydrophobic powders such as UV scattering agents is applied to the skin, the hydrophobic powder aggregates on the skin upon application, causing the user to feel a squeaky sensation due to the hydrophobic powder. Therefore, to suppress this squeaky sensation, a highly oil-absorbent powder such as a resin powder may be added, as in the water-in-oil sunscreen cosmetics described in Patent Document 1. However, in water-in-oil compositions in which a thickener or humectant is blended in the aqueous phase to provide a moist feel, the presence of such highly oil-absorbent powders makes the composition difficult to spread upon application.

[0007] Therefore, there is a demand for a water-in-oil composition that does not cause a rough feeling due to powder when applied to the skin, spreads easily, and leaves a moist feeling after application. [Means for solving the problem]

[0008] According to a first aspect of the present disclosure, there is provided a water-in-oil composition comprising: (A) 0.02% to 0.25% by mass of a water-soluble polymer; (B) 0.2% to 2.5% by mass of at least one selected from the group consisting of sugars and sugar alcohols, which are solid at atmospheric pressure and 25°C; (C) water; (D) a first powder having a hydrophobic particle surface; (E) a second powder having a hydrophilic particle surface; and (F) an oil component. Component (A) is at least one selected from the group consisting of polyacrylic acid, poly(2-acrylamido-2-methylpropanesulfonic acid), and salts thereof. Component (E) has an oil absorption of 170 ml or less of linseed oil per 100 g at 25°C. [Effects of the Invention]

[0009] The water-in-oil composition of the present disclosure suppresses the squeaking sensation caused by hydrophobic powders when applied to the skin. Furthermore, the water-in-oil composition of the present disclosure can be applied with a light spread. This allows the user to apply the water-in-oil composition with a comfortable feel. Furthermore, the user can feel a moist feeling on the skin when applying the water-in-oil composition of the present disclosure to the skin. DETAILED DESCRIPTION OF THE INVENTION

[0010] Preferred embodiments of each of the above aspects will be described below.

[0011] According to a preferred embodiment of the first aspect, the component (D) is contained in an amount of 2% by mass to 20% by mass relative to the mass of the composition.

[0012] According to a preferred embodiment of the first aspect, the component (E) is contained in an amount of 1% by mass to 5% by mass relative to the mass of the composition.

[0013] According to a preferred embodiment of the first aspect, the component (B) is at least one selected from the group consisting of trehalose, xylitol, and erythritol.

[0014] According to a preferred embodiment of the first aspect, the component (D) is at least one selected from the group consisting of hydrophobized titanium oxide and hydrophobized zinc oxide.

[0015] According to a preferred embodiment of the first aspect, the component (E) is at least one selected from the group consisting of silica, corn starch, and cellulose.

[0016] According to a preferred embodiment of the first aspect, the component (F) contains a liquid oily component and an ultraviolet absorber.

[0017] According to a preferred embodiment of the first aspect, the component (A) has a weight average molecular weight of 500,000 to 8,000,000.

[0018] According to a preferred embodiment of the first aspect, the resin powder having an average particle size of 1 μm to 20 μm is 0.1 mass % or less relative to the mass of the composition.

[0019] According to a preferred embodiment of the first aspect, the water-in-oil composition is applied to an external preparation for skin.

[0020] In the following description, POE is an abbreviation for polyoxyethylene, and POP is an abbreviation for polyoxypropylene, and the number in parentheses after POE or POP represents the average number of moles of POE groups or POP groups added in the compound.

[0021] In the present disclosure, the term "substantial amount" refers to an amount that can produce the functional effect of the compound added.

[0022] [First embodiment] A water-in-oil composition according to a first embodiment of the present disclosure will now be described. The water-in-oil composition according to the first embodiment comprises (A) a water-soluble polymer, (B) at least one selected from the group consisting of sugars and sugar alcohols that are solid at atmospheric pressure and 25°C, (C) water, (D) a first powder, (E) a second powder, and (F) an oil component. In the water-in-oil composition, at least a portion of component (A) and at least a portion of component (B) are considered to be encapsulated in the aqueous phase.

[0023] [(A) Water-soluble polymer] Component (A) is at least one selected from the group consisting of polyacrylic acid, poly(2-acrylamido-2-methylpropanesulfonic acid), and salts thereof. Hereinafter, polyacrylic acid and / or its salts will be referred to as "polyacrylic acid salts."

[0024] Examples of salts of component (A) include alkali metal salts (e.g., sodium salt, potassium salt, magnesium salt, calcium salt, etc.), organic amine salts (e.g., monoethanolamine salt, diethanolamine salt, triethanolamine salt, triisopropanolamine salt, etc.), and salts of basic nitrogen-containing compounds such as 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1,3-propanediol, 2-amino-2-hydroxymethyl-1,3-propanediol, L-arginine, L-lysine, and L-alkyltaurine. Of these, monovalent alkali metal salts and organic amine salts are preferred, more preferably sodium salt, potassium salt, and triethanolamine salt, and most preferably sodium salt.

[0025] The weight average molecular weight of component (A) can be, for example, 500,000 or more, 1,000,000 or more, or 2,000,000 or more. The weight average molecular weight of component (A) can be, for example, 20,000,000 or less, 15,000,000 or less, 10,000,000 or less, 8,000,000 or less, or 5,000,000 or less.

[0026] Component (A) can be a water-soluble polymer with a controlled molecular weight (hereinafter referred to as a "molecular weight-controlled water-soluble polymer"). The weight-average molecular weight of the molecular weight-controlled water-soluble polymer can be 500,000 or more. The weight-average molecular weight of the molecular weight-controlled water-soluble polymer can be 8,000,000 or less. The molecular weight-controlled water-soluble polymer is preferably a polymer with a controlled molecular weight (distribution). In the molecular weight-controlled water-soluble polymer, polymers with a molecular weight of 10,000,000 or more preferably account for 10% by mass or less of the total amount of water-soluble polymer. The main polymer chain of the molecular weight-controlled water-soluble polymer is preferably linear. The molecular weight distribution (= weight-average molecular weight / number-average molecular weight) of the molecular weight-controlled water-soluble polymer is preferably 2 or less, more preferably 1.8 or less. It is believed that a molecular weight-controlled polymer can further improve the uniformity of distribution of each component when the water-in-oil composition is applied to the skin. With regard to the molecular weight-controlled water-soluble polymer, the description in WO2015 / 052804 can be cited.

[0027] Molecular weight-controlled water-soluble polymers can be synthesized by known living polymerization methods. Examples of living polymerization include living anionic polymerization, living cationic polymerization, and living radical polymerization (precise radical polymerization or controlled radical polymerization). Examples of living radical polymerization include nitroxide-mediated radical polymerization, nitroxide-mediated radical polymerization (NLRP), atom transfer radical polymerization (ATRP), and reversible addition-fragmentation chain transfer (RAFT) polymerization. Examples of atom transfer radical polymerization (ATRP) include electron transfer-derived activator ATRP or activator ATRP generated by electron transfer (AGET ATRP), electron transfer-derived regenerated activator ATRP or activator ATRP regenerated by electron transfer (ARGET ATRP), initiator ATRP for continuously regenerating active species or initiator ATRP with constantly regenerating activator (ICAR ATRP), and reverse ATRP. Derivatives of reversible addition-fragmentation chain transfer (RAFT) polymerization include living radical polymerization using organotellurium as a growing terminal, or organotellurium-mediated living radical polymerization (TERP), antimony-mediated living radical polymerization (SBRP), and bismuth-mediated living radical polymerization (BIRP). Other living radical polymerizations include iodine transfer radical polymerization (IRP) and cobalt-mediated radical polymerization (CMRP). Among these, reversible addition-fragmentation chain transfer polymerization (RAFT) is preferred because it allows the synthesis of polymers with narrow molecular weight distributions. Dithio- and trithio-type chain transfer agents are preferred. Polymerization initiators with a similar chemical structure to the chain transfer agent are preferred, with azo-based initiators being preferred. The polymerization solvent is not particularly limited; a solvent with high solubility in the monomer and polymer can be selected. The polymerization time is preferably from several hours to approximately 100 hours.

[0028] The molecular weight of component (A) can be measured by known methods such as light scattering, ultracentrifugation, and chromatography for the weight average molecular weight, and osmometry and chromatography for the number average molecular weight. Among these, chromatography is preferred because it allows the weight average molecular weight, number average molecular weight, and molecular weight distribution to be easily obtained with a small amount of sample, and gel permeation chromatography (hereinafter abbreviated as GPC) is even more suitable. The molecular weight distribution can be expressed as the value obtained by dividing the weight average molecular weight obtained by GPC analysis by the number average molecular weight.

[0029] Component (A) is preferably present in an amount of 0.02% by mass or more relative to the mass of the water-in-oil composition. Component (A) can be present in an amount of 0.05% by mass or more, 0.1% by mass or more, 0.12% by mass or more, or 0.15% by mass or more relative to the mass of the water-in-oil composition. If component (A) is present in an amount of less than 0.02% by mass, the feel upon application to the skin cannot be improved. Component (A) is preferably present in an amount of 0.25% by mass or less relative to the mass of the water-in-oil composition. Component (A) can be present in an amount of 0.22% by mass or less, 0.2% by mass or less, 0.15% by mass or less, or 0.1% by mass or less relative to the mass of the water-in-oil composition. If component (A) is present in an amount of more than 0.25% by mass, the feel upon application to the skin will be reduced.

[0030] [(B) Sugar and / or Sugar Alcohol] Sugars and / or sugar alcohols are solid at atmospheric pressure and 25°C. In this disclosure, "solid" refers to something that can maintain a solid state at atmospheric pressure and 25°C. In this disclosure, "liquid" refers to something that is fluid (liquid) at atmospheric pressure and 25°C.

[0031] An example of the sugar is trehalose.

[0032] Examples of sugar alcohols include xylitol and erythritol.

[0033] Component (B) is preferably present in an amount of 0.2% by mass or more relative to the mass of the water-in-oil composition. Component (B) can be present in an amount of 0.5% by mass or more, 1% by mass or more, 1.2% by mass or more, or 1.5% by mass or more relative to the mass of the water-in-oil composition. If component (B) is present in an amount of less than 0.2% by mass, the feel upon application to the skin cannot be improved. Component (B) is preferably present in an amount of 2.5% by mass or less relative to the mass of the water-in-oil composition. Component (B) can be present in an amount of 2.2% by mass or less, 2% by mass or less, 1.5% by mass or less, or 1% by mass or less relative to the mass of the water-in-oil composition. If component (B) is present in an amount of more than 2.5% by mass, the feel upon application to the skin will be reduced.

[0034] [(C)Water] As the water, water used in cosmetics, quasi-drugs, etc. can be used, such as purified water, ion-exchanged water, tap water, etc.

[0035] Component (C) can be present in an amount of 10% by mass or more, 15% by mass or more, 20% by mass or more, 25% by mass or more, 30% by mass or more, 35% by mass or more, 40% by mass or more, or 45% by mass or more, based on the mass of the water-in-oil composition. Component (C) can be present in an amount of 60% by mass or less, 55% by mass or less, 50% by mass or less, 45% by mass or less, 40% by mass or less, 35% by mass or less, 30% by mass or less, 25% by mass or less, or 20% by mass or less, based on the mass of the water-in-oil composition.

[0036] [(D) First powder] The first powder is a powder with a hydrophobic particle surface. The first powder may also include powders whose particle surfaces have been hydrophobized. The first powder is considered to be present in the oil phase (external phase) of the water-in-oil composition. Examples of methods for hydrophobization include coating the particles with silicone resin, fatty acid, etc. The first powder may be, for example, a hydrophobized metal oxide powder. The metal oxide may be, for example, a powder that acts as an ultraviolet scattering agent. Examples of metal oxides include zinc oxide and titanium oxide.

[0037] The first powder preferably has an average primary particle size of 5 nm or more, and the first powder preferably has an average primary particle size of 50 nm or less.

[0038] The average particle size of the primary particles of the first powder can be measured using a dynamic light scattering method.

[0039] The first powder may have an oil absorption of 170 ml or less of linseed oil per 100 g of the first powder at 25° C. The oil absorption of linseed oil may be measured in accordance with JIS K5101-13-2 (boiled linseed oil method).

[0040] Component (D) is preferably 2% by mass or more, more preferably 4% by mass or more, relative to the mass of the water-in-oil composition. Component (D) can be 6% by mass or more, 8% by mass or more, 10% by mass or more, or 12% by mass or more, relative to the mass of the water-in-oil composition. When component (D) is an ultraviolet scattering agent, if component (D) is less than 2% by mass, sufficient ultraviolet protection effect cannot be obtained. Component (D) is preferably 20% by mass or less, relative to the mass of the water-in-oil composition. Component (D) can be 18% by mass or less, 16% by mass or less, 14% by mass or less, 12% by mass or less, or 10% by mass or less, relative to the mass of the water-in-oil composition. If component (D) exceeds 20% by mass, there is a risk of powdery feeling when applied to the skin.

[0041] As used herein, "squeakiness" refers to the sensation experienced when applying a composition to the skin, where the composition loses its smoothness. The user begins to feel the squeakiness after application to the skin, and the squeakiness may become more pronounced over time. The squeakiness caused by powder is called powdery squeakiness.

[0042] [(E) Second Powder] The second powder is a powder whose particle surfaces are hydrophilic, and may include powder whose particle surfaces have been subjected to a hydrophilization treatment.

[0043] The second powder may have an oil absorption of 170 ml or less of linseed oil per 100 g of the second powder at 25° C. The oil absorption of linseed oil may be measured in accordance with JIS K5101-13-2 (boiled linseed oil method).

[0044] As the second powder, for example, silica, corn starch, cellulose, etc. can be used.

[0045] The second powder preferably has an average primary particle size of 0.5 nm or more, and more preferably has an average primary particle size of 50 nm or less.

[0046] The average particle size of the primary particles of the second powder can be measured using a dynamic light scattering method.

[0047] Component (E) is preferably 1% by mass or more relative to the mass of the water-in-oil composition. Component (E) can be 1.5% by mass or more relative to the mass of the water-in-oil composition. If component (E) is less than 1% by mass, the feeling during use cannot be improved. Component (E) is preferably 5% by mass or less relative to the mass of the water-in-oil composition. Component (E) can be 4% by mass or less, 3% by mass or less, or 2.5% by mass or less relative to the mass of the water-in-oil composition. If component (E) exceeds 5% by mass, the dispersibility of the second powder deteriorates.

[0048] [(F) Oily component] The oil component preferably contains a liquid oil component. The liquid oil component preferably contains at least one selected from the group consisting of liquid hydrocarbon oil, liquid ester oil, liquid higher alcohol, and liquid silicone oil. The oil component may contain an oil-soluble UV absorber. When the oil component contains an oil-soluble UV absorber, the liquid oil component is preferably compatible with the oil-soluble UV absorber.

[0049] Examples of hydrocarbon oils include liquid paraffin, ozokerite, squalane, pristane, paraffin, ceresin, squalene, isododecane, isohexadecane, hydrogenated polydecene, and mineral oil.

[0050] Synthetic ester oils include 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, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid esters, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, glycerin di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, pentaerythritol tetra-2-ethylhexanoate. Ingredients: Glycerin Tri-2-Ethylhexanoate, Glycerin Trioctanoate, Glycerin Triisopalmitate, Trimethylolpropane Triisostearate, Cetyl 2-Ethylhexanoate, 2-Ethylhexyl Palmitate, Glycerin Trimyristate, Tri-2-Heptylundecanoic Acid Glyceride, Castor Oil Fatty Acid Methyl Ester, Oleyl Oleate, Acetoglyceride, 2-Heptyl Palmitate Examples of suitable glycerin-based copolymers include 2-hexyldecyl lauroyl glutamate, 2-hexyldodecyl lauroyl glutamate, 2-hexyldodecyl lauroyl glutamate, 2-hexylun ...

[0051] Examples of higher alcohols that can be used include straight-chain alcohols (e.g., lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, cetostearyl alcohol, etc.); branched-chain alcohols (e.g., monostearyl glycerin ether (batyl alcohol), 2-decyltetradecynol, lanolin alcohol, cholesterol, phytosterol, hexyldodecanol, isostearyl alcohol, octyldodecanol, etc.); and the like.

[0052] Examples of silicone oils include dimethylpolysiloxane, methylhydrogenpolysiloxane, methylphenylpolysiloxane, stearoxymethylpolysiloxane, polyether-modified organopolysiloxane, fluoroalkyl-polyoxyalkylene-co-modified organopolysiloxane, alkyl-modified organopolysiloxane, terminal-modified organopolysiloxane, fluorine-modified organopolysiloxane, amino-modified organopolysiloxane, silicone gel, acrylic silicone, trimethylsiloxysilicate, silicone RTV rubber, and silicone compounds such as cyclopentasiloxane.

[0053] Examples of oil-soluble UV absorbers include benzoic acid-based UV absorbers (e.g., para-aminobenzoic acid (hereinafter abbreviated as PABA), PABA monoglycerin ester, N,N-dipropoxy PABA ethyl ester, N,N-diethoxy PABA ethyl ester, N,N-dimethyl PABA ethyl ester, N,N-dimethyl PABA butyl ester, N,N-dimethyl PABA ethyl ester, diethylaminohydroxybenzoylhexyl benzoate, etc.); anthranilic acid-based UV absorbers absorbers (e.g., homomenthyl-N-acetylanthranilate, etc.); salicylic acid-based ultraviolet absorbers (e.g., ethylhexyl salicylate, amyl salicylate, menthyl salicylate, homomenthyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, p-isopropanol phenyl salicylate, homosalate, etc.); cinnamic acid-based ultraviolet absorbers (e.g., octyl methoxycinnamate, ethyl-4-isopropyl cinnamate, methyl-2,5 -Diisopropyl cinnamate, ethyl 2,4-diisopropyl cinnamate, methyl 2,4-diisopropyl cinnamate, propyl p-methoxycinnamate, isopropyl p-methoxycinnamate, isoamyl p-methoxycinnamate, octyl p-methoxycinnamate (2-ethylhexyl p-methoxycinnamate, ethylhexyl methoxycinnamate), 2-ethoxyethyl p-methoxycinnamate, cyclohexyl p-methoxycinnamate mate, ethyl-α-cyano-β-phenylcinnamate, 2-ethylhexyl-α-cyano-β-phenylcinnamate, glyceryl mono-2-ethylhexanoyl-di-para-methoxycinnamate, etc.; 3-(4'-methylbenzylidene)-d,l-camphor, 3-benzylidene-d,l-camphor; 2-phenyl-5-methylbenzoxazole; 2,2'-hydroxy-5-methylphenylbenzotriazole; 2-(2'-hydroxy-5'-t-octylphenyl)benzotriazole; 2-(2'-hydroxy-5'-methylphenylbenzotriazole; dibenzalazine; dianisoylmethane; 4-methoxy-4'-t-butyldibenzoylmethane; 5-(3,3-dimethyl-2-norbornylidene)-3-pentan-2-one, dimorpholinopyridazinone;2-Ethylhexyl-2-cyano-3,3-diphenylacrylate (Octocrellin); 2,4-bis-{[4-(2-ethylhexyloxy)-2-hydroxy]-phenyl}-6-(4-methoxyphenyl)-(1,3,5)-triazine, benzophenone-based ultraviolet absorbers (e.g., 2,4-dihydroxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2,2',4 , 4'-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-4'-methylbenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonate, 4-phenylbenzophenone, 2-ethylhexyl-4'-phenyl-benzophenone-2-carboxylate, 2-hydroxy-4-n-octoxybenzophenone, 4-hydroxy-3-carboxybenzophenone, etc.);

[0054] Component (F) can be present in an amount of 20% by weight or more, 25% by weight or more, 30% by weight or more, or 35% by weight or more, based on the weight of the water-in-oil composition. Component (F) can be present in an amount of 60% by weight or less, 55% by weight or less, 50% by weight or less, 45% by weight or less, 40% by weight or less, 35% by weight or less, or 30% by weight or less, based on the weight of the water-in-oil composition.

[0055] [(G) Surfactant] The water-in-oil composition according to the first embodiment may further contain a surfactant. The surfactant is not limited as long as it can emulsify the aqueous phase. Examples of the surfactant include anionic surfactants, cationic surfactants, amphoteric surfactants, hydrophilic nonionic surfactants, and lipophilic nonionic surfactants. When the water-in-oil composition is not to be washed off after application to the skin, the surfactant is preferably a nonionic surfactant.

[0056] 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 ether triethanolamine sulfate, POE-lauryl ether sodium sulfate, sodium laureth sulfate, etc.); N-acyl sarcosinates (e.g., sodium lauroyl sarcosinate, etc.); higher fatty acid amide sulfonates (e.g., sodium N-stearoyl-N-methyl taurate, sodium N-myristoyl-N-methyl taurate, sodium cocoyl methyl taurate, sodium lauryl methyl taurate, etc.); phosphate salts (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 ... Examples of usable surfactants include sodium propylene glycol sulfosuccinate, alkyl benzene sulfonates (e.g., sodium linear dodecyl benzene sulfonate, triethanolamine linear dodecyl benzene sulfonate, and linear dodecyl benzene sulfonic acid); higher fatty acid ester sulfates (e.g., sodium hydrogenated coconut oil fatty acid glycerin sulfate); N-acyl glutamates (e.g., monosodium N-lauroyl glutamate, disodium N-stearoyl glutamate, and monosodium N-myristoyl-L-glutamate); sulfated oils (e.g., turmeric oil); POE-alkyl ether carboxylic acids; POE-alkyl allyl ether carboxylates; α-olefin sulfonates; higher fatty acid ester sulfonates; secondary alcohol sulfates; higher fatty acid alkylolamide sulfates; sodium lauroyl monoethanolamide succinate; N-palmitoyl aspartic acid ditriethanolamine; and sodium caseinate.

[0057] Examples of cationic surfactants include alkyltrimethylammonium salts (e.g., stearyltrimethylammonium chloride, lauryltrimethylammonium chloride, etc.); alkylpyridinium salts (e.g., cetylpyridinium chloride, etc.); dialkyldimethylammonium salts (e.g., distearyldimethylammonium chloride); 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.

[0058] 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, lauryldimethylaminoacetic acid betaine, alkyl betaine, amido betaine, sulfobetaine, etc.).

[0059] 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-sorbitol fatty acid esters (e.g., POE-sorbitol monolaurate, POE-sorbitol monooleate, POE-sorbitol pentaoleate, POE-sorbitol 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) trademark), 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, PO 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.

[0060] 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-ethylhexylate, diglycerol sorbitan tetra-2-ethylhexylate, etc.); glycerin polyglycerin fatty acids (e.g., glycerin monocottonseed oil fatty acid, glycerin monoerucate, glycerin sesquioleate, glycerin monostearate, glycerin α,α'-oleic acid pyroglutamate, glycerin monostearate malate, etc.); propylene glycol fatty acid esters (e.g., propylene glycol monostearate, etc.); hydrogenated castor oil derivatives; and glycerin alkyl ethers.

[0061] The surfactant may be present in an amount of, for example, 0.2% by weight or more, 0.5% by weight or more, or 1% by weight or more, based on the weight of the water-in-oil composition, and may be present in an amount of, for example, 7% by weight or less, 5% by weight or less, 3% by weight or less, or 2% by weight or less, based on the weight of the water-in-oil composition.

[0062] [(H) Other] The water-in-oil composition of the present disclosure may contain other ingredients as needed, such as alcohol, powders other than those described above, oily ingredients other than those described above, thickeners, moisturizers, film-forming agents, water-soluble UV absorbers, sequestering agents, amino acids, organic amines, polymer emulsions, pH adjusters, skin nutrients, vitamins, antioxidants, antioxidant aids, fragrances, and the like, within the scope that does not impair the effects of the present disclosure.

[0063] Examples of the water-soluble alcohol include at least one selected from lower alcohols, polyhydric alcohols, polyhydric alcohol polymers, dihydric alcohol alkyl ethers, dihydric alcohol alkyl ethers, dihydric alcohol ether esters, glycerin monoalkyl ethers, sugar alcohols, monosaccharides, oligosaccharides, polysaccharides, and derivatives thereof.

[0064] Examples of lower alcohols include ethanol, propanol, isopropanol, isobutyl alcohol, and t-butyl alcohol.

[0065] Examples of polyhydric alcohols include dihydric alcohols (e.g., ethylene glycol, propylene glycol, trimethylene glycol, 1,2-butylene glycol, 1,3-butylene glycol, tetramethylene glycol, 2,3-butylene glycol, pentamethylene glycol, 2-butene-1,4-diol, hexylene glycol, octylene glycol, 1,2-hexanediol, etc.); trihydric alcohols (e.g., glycerin, trimethylolpropane, etc.); tetrahydric alcohols (e.g., pentaerythritol such as 1,2,6-hexanetriol, etc.); pentahydric alcohols (e.g., xylitol, etc.); hexahydric alcohols (e.g., sorbitol, mannitol, etc.); polyhydric alcohol polymers (e.g., diethylene glycol, dipropylene glycol, triethylene glycol, glycol, polypropylene glycol, tetraethylene glycol, diglycerin, polyethylene glycol, triglycerin, tetraglycerin, polyglycerin, etc.); sugar alcohols (e.g., sorbitol, maltitol, maltotriose, mannitol, sucrose, erythritol, glucose, fructose, starch-decomposed sugars, maltose, xylitol, starch-decomposed sugar-reduced alcohols, etc.); glycolide; tetrahydrofurfuryl alcohol; POE-tetrahydrofurfuryl alcohol; POP-butyl ether; POP·POE-butyl ether; tripolyoxypropylene glycerin ether; POP-glycerin ether; POP-glycerin ether phosphate; POP·POE-pentaneerythritol ether, polyglycerin, etc.

[0066] Examples of monosaccharides include trioses (e.g., D-glyceryl aldehyde, dihydroxyacetone, etc.), tetraoses (e.g., D-erythrose, D-erythrulose, D-threose, erythritol, 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-psicose, D-galactose, D-fructose, L-galactose, L-mannose, D- The sugar may be at least one selected from the group consisting of sugars such as tagatose, heptoses (e.g., aldoheptose, heptulose), octose (e.g., octulose), deoxysugars (e.g., 2-deoxy-D-ribose, 6-deoxy-L-galactose, 6-deoxy-L-mannose), aminosugars (e.g., D-glucosamine, D-galactosamine, sialic acid, aminouronic acid, muramic acid), and uronic acids (e.g., D-glucuronic acid, D-mannuronic acid, L-guluronic acid, D-galacturonic acid, L-iduronic acid).

[0067] Examples of oligosaccharides include at least one selected from sucrose, gunthianose, umbelliferose, lactose, planteose, isolychnoses, α,α-trehalose, raffinose, lychnoses, umbilicin, stachyose, verbascoses, and the like.

[0068] Examples of polysaccharides include at least one selected from cellulose, quince seed, chondroitin sulfate, starch, galactan, dermatan sulfate, glycogen, gum arabic, heparan sulfate, hyaluronic acid, tragacanth gum, keratan sulfate, chondroitin, xanthan gum, mucoitin sulfate, guar gum, dextran, keratosulfate, locust bean gum, succinoglucan, and caronic acid.

[0069] Examples of other polyols include at least one selected from polyoxyethylene methyl glucoside (Glucam E-10), polyoxypropylene methyl glucoside (Glucam P-10), and the like.

[0070] Examples of powders include inorganic powders (e.g., talc, kaolin, mica, sericite, muscovite, phlogopite, synthetic mica, lepidolite, biotite, lithia mica, calcined mica, calcined talc, vermiculite, magnesium carbonate, calcium carbonate, aluminum silicate, barium silicate, calcium silicate, magnesium silicate, strontium silicate, metal tungstate, magnesium, silica, fumed silica, zeolite, glass, barium sulfate, calcined calcium sulfate (calcined gypsum), calcium phosphate, fluorapatite, hydroxyapatite, ceramic powder, metal soap (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, etc.); oil powder, polytetrafluoroethylene powder, cellulose powder, silicone resin powder, silk powder, wool powder, urethane powder, etc.; inorganic white pigments (e.g., titanium dioxide, zinc oxide, etc.); inorganic red pigments (e.g., iron oxide (red ochre), iron titanate, etc.); inorganic brown pigments (gamma-iron oxide, etc.), inorganic yellow pigments (yellow iron oxide, ochre, etc.), inorganic black pigments (black iron oxide, carbon black, low-order titanium oxide, etc.), inorganic purple pigments (e.g., manganese 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 lakes (e.g., organic pigments such as Red 201, Red 202, Red 204, Red 205, Red 220, Red 226, Red 228, Red 405, Orange 203, Orange 204, Yellow 205, Yellow 401, and Blue 404, Red 3, Red 104, Red 106, Red 227, Red 230, Red 401, Red 505, Orange 205, Yellow 4, Yellow 5, Yellow 202, Yellow 203, Green 3, and Blue 1, etc.); natural pigments (e.g., chlorophyll, β-carotene, etc.); wax powders (e.g., carnauba wax powder, etc.); starch powders (e.g., corn starch powder, rice starch powder, etc.);

[0071] Examples of waxes include beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, Ibota wax, montan wax, rice bran wax, kapok wax, sugarcane wax, hexyl laurate, jojoba wax, hard lanolin, shellac wax, POE lanolin alcohol ether, POE cholesterol ether, POE hydrogenated lanolin alcohol ether, liquid paraffin, ozokerite, squalane, pristane, paraffin, ceresin, squalene, microcrystalline wax, and Fischer-Tropsch wax.

[0072] Examples of liquid oils and fats include avocado oil, camellia oil, macadamia nut oil, corn oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, camellia oil, castor oil, linseed oil, safflower oil, cottonseed oil, perilla oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, Chinese tung oil, Japanese tung oil, jojoba oil, germ oil, and triglycerin.

[0073] Examples of solid fats and oils include cocoa butter, coconut oil, hardened coconut oil, palm oil, palm kernel oil, Japan wax kernel oil, hardened oil, Japan wax kernel oil, hardened oil, Japan wax, and hardened castor oil.

[0074] Examples of higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, undecylenic acid, tall acid, isostearic acid, linoleic acid, linolenic acid, eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA).

[0075] 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-ethylhexylate, diglycerol sorbitan tetra-2-ethylhexylate, etc.); glycerin polyglycerin fatty acids (e.g., glycerin monocottonseed oil fatty acid, glycerin monoerucate, glycerin sesquioleate, glycerin monostearate, glycerin α,α'-oleic acid pyroglutamate, glycerin monostearate malate, etc.); propylene glycol fatty acid esters (e.g., propylene glycol monostearate, etc.); hydrogenated castor oil derivatives; and glycerin alkyl ethers.

[0076] Examples of natural water-soluble polymers include plant-derived polymers (e.g., gum arabic, tragacanth gum, galactan, guar gum, carob gum, karaya gum, carrageenan, pectin, agar, quince seed (marmella), algae colloid (cassowia extract), starch (rice, corn, potato, wheat), glycyrrhizic acid); and microbial-derived polymers (e.g., xanthan gum, dextran, succinoglucan, pullulan, etc.).

[0077] Examples of semi-synthetic water-soluble polymers include starch-based polymers (e.g., carboxymethyl starch, methylhydroxypropyl starch, etc.); cellulose-based polymers (methyl cellulose, ethyl cellulose, methylhydroxypropyl cellulose, hydroxyethyl cellulose, sodium cellulose sulfate, hydroxypropyl cellulose, carboxymethyl cellulose, sodium carboxymethyl cellulose, crystalline cellulose, cellulose powder, etc.); and alginic acid-based polymers (e.g., sodium alginate, propylene glycol alginate, etc.).

[0078] Examples of thickeners include gum arabic, carrageenan, karaya gum, tragacanth gum, carob gum, quince seed, casein, dextrin, gelatin, sodium pectinate, sodium alginate, methylcellulose, ethylcellulose, carboxymethylcellulose (CMC), hydroxyethylcellulose, hydroxypropylcellulose, polyvinyl alcohol (PVA), polyvinyl methyl ether (PVM), PVP (polyvinylpyrrolidone), sodium polyacrylate, carboxyvinyl polymer, locust bean gum, guar gum, tamarind gum, dialkyldimethylammonium cellulose sulfate, xanthan gum, aluminum magnesium silicate, bentonite, hectorite, aluminum magnesium silicate (Bee Gum), Laponite, silicic anhydride, taurate-based synthetic polymers, and acrylate-based synthetic polymers.

[0079] Examples of moisturizing agents include polyethylene glycol, propylene glycol, glycerin, 1,3-butylene glycol, xylitol, sorbitol, maltitol, diglycerin (EO)PO adduct, Rosa robur extract, yarrow extract, and melilot extract.

[0080] Examples of the coating agent include polymeric silicone, silicone resin, trimethylsiloxysilicate, etc.

[0081] Examples of water-soluble ultraviolet absorbers include benzophenone-based ultraviolet absorbers (e.g., 2-hydroxy-4-methoxybenzophenone-5-sulfonate, etc.), benzylidene camphor-based ultraviolet absorbers (benzylidene camphorsulfonic acid, terephthalidene discamphorsulfonic acid, etc.), and phenylbenzimidazole-based ultraviolet absorbers (phenylbenzimidazole sulfonic acid, etc.).

[0082] Examples of sequestering agents include 1-hydroxyethane-1,1-diphosphonic acid, 1-hydroxyethane-1,1-diphosphonic acid tetrasodium salt, edetate disodium, edetate trisodium, edetate tetrasodium, sodium citrate, sodium polyphosphate, sodium metaphosphate, gluconic acid, phosphoric acid, citric acid, ascorbic acid, succinic acid, edetic acid, and ethylenediaminehydroxyethyltriacetate trisodium salt.

[0083] Examples of amino acids include neutral amino acids (e.g., threonine, cysteine, etc.), basic amino acids (e.g., hydroxylysine, etc.), etc. Examples of amino acid derivatives include sodium acyl sarcosine (sodium lauroyl sarcosine), acyl glutamate, sodium acyl β-alanine, glutathione, pyrrolidone carboxylic acid, etc.

[0084] Examples of organic amines include monoethanolamine, diethanolamine, triethanolamine, morpholine, triisopropanolamine, 2-amino-2-methyl-1,3-propanediol, and 2-amino-2-methyl-1-propanol.

[0085] Examples of polymer emulsions include acrylic resin emulsion, polyethyl acrylate emulsion, acrylic resin liquid, polyacrylic alkyl ester emulsion, polyvinyl acetate resin emulsion, and natural rubber latex.

[0086] Examples of pH buffers include lactic acid-sodium lactate, citric acid-sodium citrate, and succinic acid-sodium succinate.

[0087] Examples of vitamins include vitamins A, B1, B2, B6, C, E and their derivatives, pantothenic acid and its derivatives, biotin, etc.

[0088] Examples of antioxidants include tocopherols, dibutylhydroxytoluene, butylhydroxyanisole, and gallic acid esters.

[0089] 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.

[0090] Other ingredients that can be added include, for example, preservatives (ethylparaben, butylparaben, chlorphenesin, phenoxyethanol, etc.); anti-inflammatory agents (for example, glycyrrhizinic acid derivatives, glycyrrhetinic acid derivatives, salicylic acid derivatives, hinokitiol, zinc oxide, allantoin, etc.); whitening agents (for example, placenta extract, saxifrage extract, arbutin, etc.); various extracts (for example, Phellodendron bark, Coptis chinensis, Lithospermum root, Peony, Swertia japonica, Birch, Sage, Loquat, Carrot, Aloe, Mallow, Iris, Grape, Job's tears, Loofah, Lily, Saffron, Cnidium rhizome, Ginger, Hypericum perforatum, Ononis, Garlic, Chili pepper, Citrus fruit, Tomato, float, seaweed, etc.), activators (e.g., royal jelly, photosensitizers, cholesterol derivatives, etc.); blood circulation promoters (e.g., nonylic acid vanillylamide, nicotinic acid benzyl ester, nicotinic acid β-butoxyethyl ester, capsaicin, zingerone, cantharides tincture, ichthammol, tannic acid, α-borneol, tocopherol nicotinate, inositol hexanicotinate, cyclandelate, cinnarizine, tolazoline, acetylcholine, verapamil, cepharanthine, γ-oryzanol, etc.); antiseborrheic agents (e.g., sulfur, thianthol, etc.); anti-inflammatory agents (e.g., tranexamic acid, thiotaurine, hypotaurine, etc.), etc.

[0091] Furthermore, the compositions of the present disclosure may also contain, as appropriate, caffeine, tannin, verapamil, tranexamic acid and derivatives thereof, various herbal extracts such as licorice, Chinese quince, and Japanese anemone, drugs such as tocopherol acetate, glycyrrhesic acid, glycyrrhizic acid and derivatives thereof or salts thereof, whitening agents such as vitamin C, magnesium ascorbyl phosphate, ascorbic acid glucoside, arbutin, and kojic acid, amino acids such as arginine and lysine and derivatives thereof, and glucoxyl hesperidin.

[0092] [Resin powder] In the water-in-oil composition of the present disclosure, the resinous powder having an average particle size of 1 μm to 20 μm is preferably 0.1 mass % or less relative to the mass of the composition, and more preferably is not actually contained in the composition (0 mass %). If the resinous powder exceeds 0.1 mass %, the composition becomes difficult to spread when applied. The resinous powder is a powder that absorbs more than 170 ml of linseed oil per 100 g of resinous powder.

[0093] [Manufacturing method] A method for producing the water-in-oil composition of the present disclosure will now be described. The water-in-oil composition of the present disclosure can be produced by a known method. For example, the production method can include the steps of mixing components (A), (B), (C), and (E) to prepare an aqueous phase, and emulsifying the aqueous phase in an oil phase containing components (D) and (F) using a surfactant.

[0094] In the water-in-oil composition of the present disclosure, it may be difficult or impractical to directly specify the phase structure, emulsion form, etc. by composition. In such cases, the water-in-oil composition of the present disclosure should be allowed to be specified by its manufacturing method.

[0095] In the water-in-oil composition of the present disclosure, by adding a water-soluble polymer that acts as a thickener and a sugar / sugar alcohol that acts as a moisturizer to the aqueous phase, the user can obtain a moist feeling after application to the skin. Furthermore, the water-soluble polymer and sugar / sugar alcohol prevent the hydrophobic powder from coagulating on the skin during application without adding a highly oil-absorbent powder. This prevents the occurrence of a squeaky feeling during application, providing the user with a comfortable application feel. Furthermore, since no highly oil-absorbent powder is added, the composition can be applied with a light feel.

[0096] The water-in-oil composition of the present disclosure can be used, for example, in skin topical preparations, such as base cosmetics, topcoat cosmetics, makeup cosmetics, antiperspirants, deodorants, sunscreen cosmetics, skin care agents, and cleansers. [Example]

[0097] The water-in-oil composition of the present disclosure will be described below with reference to examples. However, the water-in-oil composition of the present disclosure is not limited to the following examples. The content of each component shown in each table is in mass%.

[0098] [Test Examples 1 to 23] The following water-in-oil skin external preparation compositions (sunscreen cosmetics) were prepared and evaluated for moisturizing feeling after application to the skin. The evaluation methods and evaluation criteria for each test item are shown below.

[0099] [Moisturizing feeling after application] A panel of 10 experts evaluated whether they felt a moist feeling after applying the sample to their arms. They also evaluated whether there was any squeaking sensation when applying the sample and how easily the sample spread. The evaluation was conducted by comparing the composition with that of Test Example 1, which used a highly oil-absorbent (vinyl dimethicone / methicone silsesquioxane) crosspolymer powder, and each evaluation item was rated according to the number of evaluators. A: Seven or more panelists felt that the composition was equivalent to or better than the composition in Test Example 1; B: 4 to 6 panelists felt that the composition was equivalent to or better than the composition in Test Example 1; C: The number of panelists who felt that the composition was equal to or better than the composition of Test Example 1 was 3 or less.

[0100] [Test Examples 1 to 9] In Test Examples 1 to 9, the difference in sensation during use due to the presence or absence of (A) polyacrylic acid and / or a salt thereof, and / or (B) sugar and / or sugar alcohol was examined. Tables 1 and 2 show the composition and evaluation of each composition.

[0101] Test Examples 4 to 7, which did not contain at least one of component (A) and component (B), and Test Examples 8 and 9, which did not contain the second powder (E) with low oil absorption, received low ratings in all evaluation items. On the other hand, many panels felt a moist feeling in Test Examples 2 and 3, which contained component (A), component (B), and component (E). Furthermore, many panels did not feel any squeaking upon application and could feel the product spread easily.

[0102] [Table 1]

[0103] [Table 2]

[0104] [Test Examples 10-12] In Test Examples 10 to 12, tests were carried out by adding another water-soluble polymer (thickener) instead of component (A). Table 3 shows the composition and evaluation of each composition.

[0105] Water-soluble polymers other than polyacrylates were unable to improve any of the evaluation items.

[0106] [Table 3]

[0107] [Test Examples 13 to 17] In Test Examples 13 to 17, tests were carried out by adding another moisturizing component instead of component (B). Table 4 shows the composition and evaluation of each composition.

[0108] In Test Examples 13 and 14, in which a sugar alcohol was added as component (B), the scores for all evaluation items were improved. On the other hand, in Test Examples 15 to 17, in which a moisturizing component other than sugar or sugar alcohol was added instead of component (B), the scores for all evaluation items were lowered.

[0109] [Table 4]

[0110] [Test Examples 18-21] In Test Examples 18 to 21, the content of component (A) and component (B) was changed and tests were carried out. Table 5 shows the composition and evaluation of each composition.

[0111] Comparing Test Example 18 with Test Example 19, it is considered that the amount of component (A) is preferably 0.25 mass% or less relative to the mass of the composition. Comparing Test Example 20 with Test Example 21, it is considered that the amount of component (B) is preferably 2.5 mass% or less relative to the mass of the composition.

[0112] [Table 5]

[0113] [Test Examples 22-23] In Test Examples 22 and 23, tests were carried out by changing the molecular weight and type of component (A). Table 6 shows the composition and evaluation of each composition.

[0114] Good evaluations were obtained in both Test Example 22, which used sodium polyacrylate having a different molecular weight from the above Test Examples, and Test Example 23, which used poly(2-acrylamido-2-methylpropanesulfonic acid).

[0115] [Table 6]

[0116] The water-in-oil composition of the present invention has been described based on the above embodiments and examples, but is not limited to the above embodiments and examples, and can include various modifications, changes, and improvements to each disclosed element (including elements described in the claims, specification, and drawings) within the scope of the present invention and based on the basic technical idea of ​​the present invention. Furthermore, various combinations, substitutions, and selections of each disclosed element are possible within the scope of the claims of the present invention.

[0117] Further objects, purposes and modes (including modifications) of the present invention will become apparent from the entire disclosure of the present invention including the claims.

[0118] With respect to numerical ranges set forth herein, unless otherwise specified, any numerical value or range falling within that range should be construed as being specifically set forth herein.

[0119] Some or all of the above embodiments may be described as, but are not limited to, the following supplementary notes. Each supplementary note may be combined with each claim in the claims. [Appendix 1] A method for using the water-in-oil composition of the present disclosure as an external skin preparation. [Appendix 2] A method for using the water-in-oil composition of the present disclosure as a sunscreen cosmetic. [Industrial Applicability]

[0120] The water-in-oil composition of the present disclosure can be used, for example, in cosmetics that are applied to the skin, cleansers, etc. For example, the water-in-oil composition of the present disclosure can be used in base cosmetics, topcoat cosmetics, makeup cosmetics, antiperspirants, deodorants, sunscreen cosmetics, skin care agents, cleansers, etc.

Claims

1. (A) 0.02% by mass to 0.25% by mass of a water-soluble polymer; (B) 0.2% by mass to 2.5% by mass of at least one selected from the group consisting of trehalose, xylitol, and erythritol; (C) water; (D) a first powder having a hydrophobic particle surface; (E) a second powder having hydrophilic particle surfaces; (F) an oily component, the component (A) is at least one selected from the group consisting of polyacrylic acid, poly(2-acrylamido-2-methylpropanesulfonic acid), and salts thereof; The component (E) is a water-in-oil composition having an oil absorption of linseed oil at 25°C of 170 ml or less per 100 g.

2. 2. The water-in-oil composition of claim 1, wherein component (D) is present in an amount of 2% to 20% by weight based on the weight of the composition.

3. 3. The water-in-oil composition according to claim 1, wherein the component (E) is present in an amount of 1% to 5% by weight relative to the weight of the composition.

4. 4. The water-in-oil composition according to claim 1, wherein the component (D) is at least one selected from the group consisting of hydrophobized titanium oxide and hydrophobized zinc oxide.

5. 5. The water-in-oil composition according to claim 1, wherein the component (E) is at least one selected from the group consisting of silica, corn starch, and cellulose.

6. The water-in-oil composition according to any one of claims 1 to 5, wherein the component (F) comprises a liquid oily component and an ultraviolet absorber.

7. The water-in-oil composition according to any one of claims 1 to 6, wherein the component (A) has a weight average molecular weight of 500,000 to 8,000,000.

8. 8. The water-in-oil composition according to claim 1, wherein the resinous powder having an average particle size of 1 μm to 20 μm is contained in an amount of 0.1% by mass or less relative to the mass of the composition.

9. The water-in-oil composition according to any one of claims 1 to 8, which is applied to an external preparation for skin.

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