Oil in water

Abstract

To provide an oil-in-water type composition by which a user does not have squeaky feeling when applying on skin, and can feel moist feeling after application.SOLUTION: An oil-in-water type composition includes: (A) a first oily component which consists of semisolid oil component having the melting temperature of 40°C to 50°C; (B) first powder with a hydrophobic particle surface; (C) a second oily component including liquid oily component; and (D) aqueous solvent. Component (A) has 0.04 pt.mass to 0.4 pt.mass with respect to 1 pt.mass of component (B).SELECTED DRAWING: None

Description

[Technical field]

[0001] The present disclosure relates to oil-in-water compositions. [Background technology]

[0002] Oil-in-water compositions are used in skin external preparations such as sunscreen cosmetics (see, for example, Patent Document 1). Patent Document 1 describes an oil-in-water skin cosmetic that contains an ultraviolet absorbent and an ester oil having a sterol skeleton. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2019 / 065368 Summary of the Invention [Problem to be solved by the invention]

[0004] The following analysis is provided in light of the present disclosure.

[0005] Some sunscreen cosmetics contain powder as an ultraviolet scattering agent. In such sunscreen cosmetics, a large amount of ultraviolet scattering agent may be added to enhance the ultraviolet protection effect. However, when an oil-in-water composition with a large powder content is applied to the skin, the user feels a squeaking sensation caused by the powder when applying the composition. Therefore, in order to alleviate such a squeaking sensation, another powder such as silica (squeak-reducing powder) may be further added. However, when an oil-in-water composition with such a squeaking-reducing powder is applied to the skin, the user can feel a smooth feeling when using the composition, but cannot feel a moist feeling when using the composition.

[0006] Thus, there is a demand for oil-in-water compositions that do not cause a squeaky feeling when applied to the skin and that provide a moist feeling after application. [Means for solving the problem]

[0007] According to a first aspect of the present disclosure, there is provided an oil-in-water composition comprising (A) a first oil component consisting of a semi-solid oil having a melting point of 40° C. to 50° C., (B) a first powder having a hydrophobic particle surface, (C) a second oil component containing a liquid oil component, and (D) an aqueous solvent. Component (A) is at least one of a palm-derived oil and myristyl myristate. Component (B) is a hydrophobized metal oxide having an average primary particle size of 5 nm to 50 nm. The amount of component (B) is 6% by mass to 20% by mass based on the mass of the composition. The amount of component (A) is 0.04 part by mass to 0.4 part by mass based on 1 part by mass of the component (B). Effect of the Invention

[0008] In the oil-in-water composition of the present disclosure, the squeaking sound caused by the hydrophobized powder when applied to the skin is suppressed. This allows the user to apply the oil-in-water composition with a comfortable feeling. In addition, when the oil-in-water composition of the present disclosure is applied to the skin, the user can feel a moist feeling on the skin. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Preferred embodiments of each of the above aspects are described below.

[0010] According to a preferred embodiment of the first aspect, the amount of component (B) is 2% by mass to 20% by mass relative to the mass of the composition, and the amount of component (C) is 5% by mass to 25% by mass relative to the mass of the composition.

[0011] According to a preferred embodiment of the first aspect, the component (A) is at least one selected from the group consisting of palm-derived oils and fatty acid ester oils.

[0012] According to a preferred embodiment of the first aspect, the palm-derived oil is a mixture of at least one of palm oil and palm kernel oil, and hydrogenated palm oil.

[0013] According to a preferred embodiment of the first aspect, the fatty acid ester oil is at least one selected from the group consisting of macadamiate phytosteryl and myristyl myristate.

[0014] According to a preferred embodiment of the first aspect, component (B) is a hydrophobized metal oxide having an average primary particle size of 5 nm to 50 nm.

[0015] According to a preferred embodiment of the first aspect, component (C) contains an oil-soluble ultraviolet absorber.

[0016] According to a preferred embodiment of the first aspect, the oil-in-water composition is applied to an external preparation for skin.

[0017] 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 indicates the average number of moles of POE groups or POP groups added in the compound.

[0018] In the present disclosure, the term "substantial amount" refers to an amount that can produce an effective effect by adding the compound.

[0019] [First embodiment] The oil-in-water composition according to the first embodiment of the present disclosure will be described. The oil-in-water composition according to the first embodiment includes (A) a first oil component, (B) a first powder, (C) a second oil component, and (D) an aqueous solvent. In the oil-in-water composition, at least a portion of component (B) is considered to be encapsulated in oil droplets of component (C).

[0020] [(A) First oily component] The first oil component is composed of semi-solid oil. The semi-solid oil is considered to be present in the oil phase. The semi-solid oil is not completely solidified or liquefied at atmospheric pressure and 25°C, and is distinguished from liquid oil and solid oil. In the present disclosure, "solid" refers to an oil that can maintain a solid state at atmospheric pressure and 25°C. In the present disclosure, "liquid" refers to an oil that has fluidity (liquid state) at atmospheric pressure and 25°C. Component (A) has a melting point of 40°C to 50°C, preferably 44°C to 50°C. The melting point can be measured, for example, based on JIS K0064-1992. Preferably, the semi-solid oil has a hardness of 5 to 100 at 25°C under a curd meter load of 800g, 5.6φ.

[0021] The semi-solid oil is at least one selected from the group consisting of palm-derived oil and fatty acid ester oil. In the present disclosure, the palm-derived oil is a mixture of at least one selected from the group consisting of palm oil and palm kernel oil, and hydrogenated palm oil, and has a melting point of 44°C to 50°C. In the present disclosure, the fatty acid ester oil is at least one selected from the group consisting of macadamiate phytosteryl and myristyl myristate, and has a melting point of 40°C to 50°C.

[0022] The amount of component (A) is preferably 0.8% by mass or more, more preferably 1% by mass or more, based on the mass of the oil-in-water composition. The amount of component (A) can be 1.5% by mass or more, or 2% by mass or more, based on the mass of the oil-in-water composition. If the amount of component (A) is less than 0.8% by mass, the spreadability during application is poor. The amount of component (A) is preferably 3.5% by mass or less, more preferably 3% by mass or less, based on the mass of the oil-in-water composition. The amount of component (A) can be 2.5% by mass or less, or 2% by mass or less, based on the mass of the oil-in-water composition. If the amount of component (A) is more than 3.5% by mass, the composition becomes sticky when applied to the skin.

[0023] The component (A) is preferably 0.04 parts by mass or more relative to 1 part by mass of the component (B) described below. The component (A) can be, for example, 0.05 parts by mass or more, 0.08 parts by mass or more, 0.1 parts by mass or more, 0.15 parts by mass or more, 0.2 parts by mass or more, 0.25 parts by mass or more, or 0.3 parts by mass or more relative to 1 part by mass of (B). If the component (A) is less than 0.04 parts by mass, squeaking due to the component (B) occurs during application. The component (A) is preferably 0.4 parts by mass or less relative to 1 part by mass of the component (B). The component (A) can be, for example, 0.38 parts by mass or less, 0.35 parts by mass or less, 0.3 parts by mass or less, 0.25 parts by mass or less, 0.2 parts by mass or less, or 0.15 parts by mass or less relative to 1 part by mass of (B). If the component (A) exceeds 0.4 parts by mass, the moist feeling after application is lost.

[0024] In the present disclosure, "squeakiness" refers to the sensation of the composition becoming less smooth when applied to the skin. The user begins to feel the squeakiness after application to the skin, and the squeakiness may become stronger over time. Squeakiness caused by powder is called powder squeakiness.

[0025] [(B) First powder] The first powder is a powder with a hydrophobic particle surface. The first powder may also include a powder whose particle surface has been hydrophobized. The first powder is considered to be encapsulated in the oil droplet particles (internal phase) in the oil-in-water composition. For example, the hydrophobization method may include coating the powder with a silicone resin, a fatty acid, or the like. 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 the metal oxide include zinc oxide, titanium oxide, iron oxide, and cerium oxide.

[0026] The first powder preferably has an average primary particle size of 5 nm or more, and more preferably has an average primary particle size of 50 nm or less.

[0027] The first powder may have a linseed oil absorption of 170 ml or less per 100 g of the first powder at 25° C. The linseed oil absorption may be measured in accordance with JIS K5101-13-2 (boiled linseed oil method).

[0028] The content of component (B) is preferably 2% by mass or more, more preferably 4% by mass or more, based on the mass of the oil-in-water composition. The content of component (B) can be 6% by mass or more, 8% by mass or more, 10% by mass or more, or 12% by mass or more, based on the mass of the oil-in-water composition. When component (B) is an ultraviolet scattering agent, if the content of component (B) is less than 2% by mass, sufficient ultraviolet protection effect cannot be obtained. The content of component (B) is preferably 20% by mass or less, based on the mass of the oil-in-water composition. The content of component (B) 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, based on the mass of the oil-in-water composition. If the content of component (B) exceeds 20% by mass, there is a risk of powdery squeaking when applied to the skin.

[0029] [(C) Second oily component] The second oil component includes a liquid oil component. In the present disclosure, the second oil component does not include component (A). When the second oil component includes an oil-soluble UV absorber, the liquid oil component is preferably an oil component compatible with the oil-soluble UV absorber. Component (C) preferably includes at least one selected from the group consisting of liquid hydrocarbon oil, liquid ester oil, liquid higher alcohol, and liquid silicone oil.

[0030] Examples of the hydrocarbon oil include liquid paraffin, ozokerite, squalane, pristane, paraffin, ceresin, squalene, isododecane, isohexadecane, hydrogenated polydecene, and mineral oil.

[0031] 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 ester, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, glycerin di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, pentaerythritol tetra-2-ethylhexanoate, glyceryl tri-2-ethylhexanoate, glyceryl trioctanoate, glyceryl triisopalmitate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, glyceryl trimyristate, tri-2-heptylundecanoate glyceride, castor oil fatty acid methyl ester, oleyl oleate, acetoglyceride, 2-heptyl palmitate Examples of suitable glyceryl esters include lauroyl undecyl, 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.

[0032] 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-decyltetradecinol, lanolin alcohol, cholesterol, phytosterol, hexyldodecanol, isostearyl alcohol, octyldodecanol, etc.); and the like.

[0033] 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.

[0034] Component (C) may contain an oil-soluble UV absorber.

[0035] Examples of oil-soluble ultraviolet absorbers include benzoic acid-based ultraviolet 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 ultraviolet 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-paramethoxycinnamate, 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 UV 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.;

[0036] Component (C) can be 5% by mass or more, 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, or 35% by mass or more, based on the mass of the oil-in-water composition. Component (C) can be 40% by mass or less, 35% by mass or less, 30% by mass or less, 25% by mass or less, 20% by mass or less, 15% by mass or less, or 10% by mass or less, based on the mass of the oil-in-water composition.

[0037] [(D) Aqueous solvent]

[0038] The aqueous solvent may include, for example, water, a water-soluble alcohol, or a mixture thereof.

[0039] As the water, water used in cosmetics, quasi-drugs, etc. can be used, for example, purified water, ion-exchanged water, tap water, etc.

[0040] 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.

[0041] Examples of the lower alcohol include ethanol, propanol, isopropanol, isobutyl alcohol, and t-butyl alcohol.

[0042] 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 decomposition sugars, maltose, xylitol, starch decomposition 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.

[0043] 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-psychose, D-galactose, D-fructose, L-galactose, L-mannose, D- Examples of the sugar include at least one selected from the group consisting of sugars such as tagatose, seven-carbon sugars (e.g., aldoheptose, heptulose, etc.), eight-carbon sugars (e.g., octulose, 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.), and uronic acids (e.g., D-glucuronic acid, D-mannuronic acid, L-guluronic acid, D-galacturonic acid, L-iduronic acid, etc.).

[0044] Examples of oligosaccharides include at least one selected from sucrose, gunthianose, umbelliferose, lactose, planteose, isolichinoses, α,α-trehalose, raffinose, lychinoses, umbilicin, stachyose, verbascoses, and the like.

[0045] 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.

[0046] Examples of the other polyols include at least one selected from polyoxyethylene methyl glucoside (Glucam E-10), polyoxypropylene methyl glucoside (Glucam P-10), and the like.

[0047] Component (D) can be present in an amount of 20% by weight or more, 30% by weight or more, 45% by weight or more, 50% by weight or more, or 60% by weight or more, based on the weight of the oil-in-water composition. Component (D) can be present in an amount of 90% by weight or less, 80% by weight or less, 70% by weight or less, 60% by weight or less, 50% by weight or less, or 40% by weight or less, based on the weight of the oil-in-water composition.

[0048] The amount of water may be 40% by mass or more, 50% by mass or more, 60% by mass or more, 70% by mass or more, 80% by mass or more, or 90% by mass or more, based on the mass of component (D). The amount of water may be 100% by mass or less, 90% by mass or less, 80% by mass or less, 70% by mass or less, 60% by mass or less, or 50% by mass or less, based on the mass of component (D).

[0049] [(E) Second Powder] The oil-in-water composition according to the first embodiment may contain a second powder in addition to component (B). In the present disclosure, the second powder is not included in component (B). The second powder may contain a powder that suppresses the squeaking caused by the first powder. The second powder may be at least one selected from the group consisting of silica, cornstarch, and cellulose.

[0050] In the second powder, 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 %). The resinous powder is a powder having an oil absorption of more than 170 ml of linseed oil per 100 g of the resinous powder.

[0051] The second powder can include the following powders. Examples of the second powder include inorganic powders (e.g., talc, kaolin, mica, sericite, white mica, gold mica, synthetic mica, red mica, black mica, lithia mica, calcined mica, calcined talc, vermiculite, magnesium carbonate, calcium carbonate, aluminum silicate, barium silicate, calcium silicate, magnesium silicate, strontium silicate, tungstate metal salts, 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, polymethylmethacrylate powder, polystyrene powder, styrene-acrylic acid copolymer resin powder, benzoguanamine powder, etc.); Resin 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 oxide), iron titanate, etc.); inorganic brown pigments (γ-iron oxide, etc.), inorganic yellow pigments (yellow iron oxide, ocher, 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.), etc. may be used.

[0052] Component (E) can be present in an amount of 0.2% by weight or more, 0.5% by weight or more, 1% by weight or more, or 2% by weight or more, based on the weight of the oil-in-water composition. Component (E) can be present in an amount of 10% 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 oil-in-water composition.

[0053] [(F) Surfactant] The oil-in-water composition according to the first embodiment may further contain a surfactant. The surfactant is not limited as long as it can emulsify an oily component. Examples of the surfactant include anionic surfactants, cationic surfactants, amphoteric surfactants, hydrophilic nonionic surfactants, and lipophilic nonionic surfactants. When the oil-in-water composition is not washed off after application to the skin, the surfactant is preferably a nonionic surfactant.

[0054] 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., triethanolamine POE-lauryl ether sulfate, sodium POE-lauryl ether sulfate, sodium laureth sulfate, etc.); N-acylsarcosinates (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 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 ... sodium polypropylene glycol sulfosuccinate, etc.); alkylbenzene sulfonates (e.g., sodium linear dodecylbenzene sulfonate, triethanolamine linear dodecylbenzene sulfonate, linear dodecylbenzene sulfonic acid, etc.); higher fatty acid ester sulfates (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 sulfates; higher fatty acid alkylolamide sulfates; sodium lauroyl monoethanolamide succinate; ditriethanolamine N-palmitoyl aspartate; sodium caseinate, etc. can be used.

[0055] 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.

[0056] 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.).

[0057] 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), 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 tri ... E-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.

[0058] 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.

[0059] The amount of the surfactant can be, 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 oil-in-water composition. The amount of the surfactant can be, for example, 5% by weight or less, 3% by weight or less, or 2% by weight or less, based on the weight of the oil-in-water composition.

[0060] [(G)Other] The oil-in-water composition of the present disclosure may contain other components as needed, such as oily components other than those described above, thickeners, moisturizers, film-forming agents, water-soluble ultraviolet absorbers, sequestering agents, amino acids, organic amines, polymer emulsions, pH adjusters, skin nutrients, vitamins, antioxidants, antioxidant assistants, fragrances, and the like, to the extent that the effects of the present disclosure are not impaired.

[0061] Examples of waxes include beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, Ibota wax, montan wax, 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.

[0062] 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, sasanqua 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.

[0063] Examples of solid fats and oils include cacao butter, coconut oil, hardened coconut oil, palm oil, palm kernel oil, Japan Rice Kernel Oil, hardened oil, Japan Rice Kernel Oil, hardened oil, Japan Rice, and hardened castor oil.

[0064] Examples of higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, undecylenic acid, tallic acid, isostearic acid, linoleic acid, linoleic acid, eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA).

[0065] Examples of natural water-soluble polymers include plant-based polymers (e.g., gum arabic, tragacanth gum, galactan, guar gum, carob gum, karaya gum, carrageenan, pectin, agar, quince seed, algae colloids (cassou extract), starch (rice, corn, potato, wheat), glycyrrhizic acid); and microbial polymers (e.g., xanthan gum, dextran, succinoglucan, pullulan, etc.).

[0066] 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.); alginic acid-based polymers (e.g., sodium alginate, propylene glycol alginate, etc.).

[0067] Examples of thickening agents 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, magnesium aluminum silicate, bentonite, hectorite, magnesium aluminum silicate (veegum), laponite, silicic anhydride, taurate-based synthetic polymers, and acrylate-based synthetic polymers.

[0068] Examples of moisturizing agents include polyethylene glycol, propylene glycol, glycerin, 1,3-butylene glycol, xylitol, sorbitol, maltitol, diglycerin (EO)PO adduct, Rosa rugosa extract, Achillea millefolium extract, and Melilot extract.

[0069] Examples of the coating agent include polymeric silicone, silicone resin, trimethylsiloxysilicate, etc.

[0070] 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, terephthalidenedichamnorsulfonic acid, etc.), and phenylbenzimidazole-based ultraviolet absorbers (phenylbenzimidazole sulfonic acid, etc.).

[0071] 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.

[0072] 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.

[0073] 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.

[0074] Examples of polymer emulsions include acrylic resin emulsions, polyethyl acrylate emulsions, acrylic resin liquids, polyacrylic alkyl ester emulsions, polyvinyl acetate resin emulsions, and natural rubber latex.

[0075] Examples of pH buffers include lactic acid-sodium lactate, citric acid-sodium citrate, and succinic acid-sodium succinate. etc. Some examples include:

[0076] Vitamins include, for example, vitamin A, B 1 、B 2 、B 6, C, E or Its derivative, pantothenic acid or Examples of the derivatives include biotin.

[0077] Examples of the antioxidant include tocopherols, dibutylhydroxytoluene, butylhydroxyanisole, and gallic acid esters.

[0078] 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.

[0079] Other possible ingredients include, for example, preservatives (ethylparaben, butylparaben, chlorphenesin, phenoxyethanol, etc.); anti-inflammatory agents (for example, glycyrrhizic 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 japonica, Lithospermum root, Peony root, Swertia japonica, Birch, Sage, Loquat, Carrot, Aloe, Mallow, Iris, Grape, Coix seed, Loofah, Lily, Saffron, Cnidium rhizome, Ginger, Hypericum perforatum, Ononis, Garlic, Capsicum annuum, Citrus aurantium, Tomentosum, float, seaweed, etc.), activators (for example, royal jelly, photosensitizers, cholesterol derivatives, etc.); blood circulation promoters (for example, vanillylamide nonylate, 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 (for example, sulfur, thianthol, etc.); anti-inflammatory agents (for example, tranexamic acid, thiotaurine, hypotaurine, etc.), etc.

[0080] Additionally, the compositions of the present disclosure may contain caffeine, tannin, verapamil, tranexamic acid or Its derivatives, various herbal extracts such as licorice, Chinese quince, and Japanese anemone, tocopherol acetate, glycyrrhesic acid, glycyrrhizic acid Or its derivatives or salts, etc., whitening agents such as vitamin C, magnesium ascorbyl phosphate, ascorbyl glucoside, arbutin, kojic acid, etc., amino acids such as arginine, lysine, etc. or Its derivative, glucoxyl hesperidin, may also be included where appropriate.

[0081] [Manufacturing method] The method for producing the oil-in-water composition of the present disclosure will be described. The oil-in-water composition of the present disclosure can be produced by a known method. For example, the production method can include a step of mixing component (A), component (B) and component (C) to prepare an oil phase, and a step of emulsifying the oil phase in component (D) using a surfactant.

[0082] In the oil-in-water compositions of the present disclosure, there are cases where it is difficult or simply impractical to directly specify the phase structure, emulsion form, etc. by the composition. In such cases, the oil-in-water compositions of the present disclosure should be allowed to be specified by their manufacturing method.

[0083] In the oil-in-water composition of the present disclosure, when the oil-in-water composition is applied to the skin, the squeaking caused by the hydrophobic powder is suppressed. For example, in the oil-in-water composition of the present disclosure, even if the hydrophobic powder has low oil absorption, the semi-solid oil in the oil phase suppresses the aggregation of the hydrophobic powder on the skin without adding a powder with high oil absorption. This suppresses the occurrence of squeaking during application, and the user can obtain a comfortable application feeling. In addition, since the oil-in-water composition of the present disclosure does not require the addition of a powder that suppresses squeaking, the user can obtain a moist feeling due to the semi-solid oil after application to the skin.

[0084] The oil-in-water composition of the present disclosure can be applied to, for example, skin external preparations. The oil-in-water composition of the present disclosure can be applied to, for example, base cosmetics, top cosmetics, makeup cosmetics, antiperspirants, deodorants, sunscreen cosmetics, skin care agents, cleansers, etc. EXAMPLES

[0085] The oil-in-water composition of the present disclosure will be described below with reference to examples. However, the oil-in-water composition of the present disclosure is not limited to the following examples. The content of each component shown in each table is in mass%.

[0086] [Test Examples 1-15] The following skin topical compositions (sunscreen cosmetics), which are oil-in-water compositions, were prepared and evaluated for powderiness when applied to the skin and moisturizing feeling after application to the skin. The evaluation method and evaluation criteria for each test item are shown below. Tables 1 to 4 show the composition and evaluation of each skin topical composition.

[0087] [No squeaking when applied] A panel of 10 experts evaluated whether they felt any powdery sensation when applying the sample to their arms. Each evaluation item was scored according to the number of people who evaluated. A: Three or fewer panelists felt the powder creaking when applying; B: Four to six panelists felt the powder creaking when applied; C: Seven or more panelists felt a squeaking sensation when applying the powder.

[0088] [Moisturizing feeling after application] A panel of 10 experts evaluated whether the samples felt moisturized after application to the arms. Each evaluation item was scored according to the number of people. A: Seven or more panelists felt a moist feeling after application; B: Four to six panelists felt a moist feeling after application; C: Three or fewer panelists felt a moist feeling after application.

[0089] [Test Examples 1-9] In Test Examples 1 to 9, the type of semi-solid oil was changed. In Test Examples 1 to 4, which contain semi-solid oil with a melting point of 40 to 50°C, good evaluations were obtained even when hydrophobized zinc oxide with low oil absorption was used. In particular, in Test Examples 1 and 2, which use palm-derived oil with a melting point of 44°C to 50°C, the moist feeling could be further improved. On the other hand, Test Example 5, in which an oil with a high melting point was added instead of the semi-solid oil, and Test Examples 6 and 7, in which a liquid polyhydric alcohol was added, did not receive high evaluations, similar to Test Examples 8 and 9, in which no oil equivalent to component (A) was added.

[0090] [Table 1]

[0091] [Table 2]

[0092] [Test Examples 10-11] In Test Examples 10 and 11, hydrophilic treated titanium oxide coated with silica was used instead of hydrophobic treated powder. Compared with Test Examples 1 and 2, the evaluations of Test Examples 10 and 11 were lower. In Test Examples 10 and 11, the hydrophilic treated powder was dispersed in the aqueous phase (exterior), so the effect of the semi-solid oil was not obtained, and it is considered that the oil-in-water composition was applied to the skin, and when the volatile components in the aqueous phase volatilized, it aggregated, which deteriorated the feeling of use. On the other hand, in Test Examples 1 and 2, the hydrophobic treated powder was dispersed in the oil phase (inner phase), so it is considered that the semi-solid oil suppressed the aggregation of the hydrophobic treated powder, thereby reducing the powdery squeaking during application. In addition, it is considered that the semi-solid oil applied was softened by body temperature, so that the semi-solid oil slowly spread and the user was able to get a moist feeling.

[0093] [Table 3]

[0094] [Test Examples 12 to 15] In Test Examples 12 to 15, the content of semi-solid oil and hydrophobized powder was changed. Test Examples 13 and 14 obtained good evaluations similar to Test Example 1. On the other hand, Test Example 12, which had a low content of semi-solid oil, was evaluated as having powdery squeaking. From this, it is considered that the semi-solid oil content is preferably 0.8% by mass or more relative to the mass of the oil-in-water composition. Also, Test Example 15, which had a high content of semi-solid oil, was evaluated as having a low moist feeling. From this, it is considered that the semi-solid oil content is preferably 3.5% by mass or less relative to the mass of the oil-in-water composition.

[0095] [Table 4]

[0096] The oil-in-water composition of the present invention has been described based on the above-mentioned embodiments and examples, but is not limited to the above-mentioned embodiments and examples, and may include various modifications, changes, and improvements to each of the disclosed elements (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 of the disclosed elements are possible within the scope of the claims of the present invention.

[0097] Further objects, objectives and modes (including modifications) of the present invention will become apparent from the entire disclosure of the present invention including the claims.

[0098] With respect to numerical ranges set forth herein, unless otherwise stated, any numerical value or range falling within that range should be construed as being specifically set forth herein.

[0099] A part or all of the above-described 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 of using the oil-in-water composition of the present disclosure, comprising using the oil-in-water composition as an external skin preparation. [Appendix 2] A method for using the oil-in-water composition of the present disclosure as a sunscreen cosmetic. [Industrial Applicability]

[0100] The oil-in-water composition of the present disclosure can be used, for example, in cosmetics that are applied to the skin, cleansing agents, etc. For example, the oil-in-water composition of the present disclosure can be used in base cosmetics, top cosmetics, makeup cosmetics, antiperspirants, deodorants, sunscreen cosmetics, skin care agents, cleansing agents, etc.

Claims

1. (A) a first oil component consisting of a semi-solid oil having a melting point of 40°C to 50°C; (B) a first powder having a hydrophobic particle surface; (C) a second oil component comprising a liquid oil component; (D) an aqueous solvent, The component (A) is at least one of palm-derived oil and myristyl myristate, The component (B) is a hydrophobized metal oxide having an average primary particle size of 5 nm to 50 nm, The component (B) is present in an amount of 6% by weight to 20% by weight based on the weight of the composition; The component (A) is 0.04 to 0.4 parts by mass per 1 part by mass of the component (B).

2. 2. The oil-in-water composition of claim 1, wherein the component (C) is from 5% to 25% by weight based on the weight of the composition.

3. 3. The oil-in-water composition according to claim 1, wherein the palm-derived oil is a mixture of at least one of palm oil and palm kernel oil, and hydrogenated palm oil.

4. The oil-in-water composition according to any one of claims 1 to 3, wherein the component (A) is 0.1 to 0.4 parts by mass per 1 part by mass of the component (B).

5. 5. The oil-in-water composition according to claim 1, wherein the component (A) is present in an amount of from 0.8% to 3.5% by weight based on the weight of the composition.

6. The oil-in-water composition according to any one of claims 1 to 5, wherein the component (C) comprises an oil-soluble UV absorber.

7. The oil-in-water composition according to any one of claims 1 to 6, which is applied as an external preparation for skin.

Images