Oil-in-water cosmetic

Abstract

One embodiment of the oil-in-water cosmetic according to the present invention contains (A) a powder, (B) a water-soluble alkyl-substituted polysaccharide derivative, and (C) polyglyceryl polyricinoleate or a polyglyceryl isostearate / dimer dilinoleic acid copolymer.

Description

Oil-in-water cosmetics

[0001] The present invention relates to an oil-in-water cosmetic.

[0002] Oil-in-water cosmetics provide a fresh feeling when applied to the skin, and are therefore widely used as a base for external skin preparations such as skin cosmetics that are applied directly to the skin. As protecting the skin from ultraviolet rays has become a daily practice in skin care and body care, a fresh feeling when used is also desired in UV care cosmetics, and therefore oil-in-water cosmetics as a base are becoming increasingly important.

[0003] UV care cosmetics are desired to have high water resistance because they are used not only in daily life but also in situations such as swimming in pools or the sea in summer, and outdoor activities such as sports that involve sweating. However, oil-in-water cosmetics have the problem that their water resistance is not fully satisfactory.

[0004] Furthermore, sunscreen cosmetics, which are a type of UV care cosmetic, contain ultraviolet protection agents such as ultraviolet absorbers and ultraviolet scattering agents to block the UVA region (320 nm to 400 nm) and UVB region (280 nm to 320 nm) from reaching the skin, thereby protecting the skin from the harmful effects of ultraviolet rays. In order to obtain a high sun protection factor (SPF), it is necessary to enhance the dispersibility of the ultraviolet protection agent and to blend it in a stably dispersed state.

[0005] For example, it has been disclosed that a cosmetic composition containing an oil solution in which fullerene, which can be used as an ultraviolet absorber, is dissolved, a nonionic surfactant, a polyhydric alcohol, an oil solution, and water has excellent dispersion stability of the fullerene (see Patent Document 1).

[0006] Japanese Patent Application Laid-Open No. 2018-172362

[0007] In view of the above, an object of one aspect of the present invention is to provide an oil-in-water cosmetic that is excellent in water resistance, dispersibility, and UV protection effect, and that has a fresh feel when used.

[0008] In order to solve the above problems, one aspect of the oil-in-water cosmetic according to the present invention is characterized by containing (A) a powder, (B) a water-soluble alkyl-substituted polysaccharide derivative, and (C) polyglyceryl polyricinoleate or (polyglyceryl isostearate / dimer dilinoleate) copolymer.

[0009] According to one aspect of the present invention, it is possible to provide an oil-in-water cosmetic that is excellent in water resistance, dispersibility, and UV protection effect, and that has a fresh feeling when used.

[0010] Hereinafter, embodiments of the present invention will be described in detail. Note that the embodiments are not limited by the following description and can be modified as appropriate within the scope of the present invention. Furthermore, in this specification, unless otherwise specified, the term "to" indicating a range of values ​​means that the values ​​before and after it are included as the lower and upper limits.

[0011] (Oil-in-water Cosmetic) An oil-in-water cosmetic according to one embodiment contains (A) a powder, (B) a water-soluble alkyl-substituted polysaccharide derivative, and (C) polyglyceryl polyricinoleate or (polyglyceryl isostearate / dimer dilinoleate) copolymer, and may further contain other ingredients as necessary.

[0012] The present inventors have conducted extensive research and have found that in an oil-in-water cosmetic composition that provides a fresh feel when used, the inclusion of (C) polyglyceryl polyricinoleate or (polyglyceryl isostearate / dimer dilinoleate) copolymer improves the dispersibility of (A) powder, thereby providing excellent UV protection and also improving water resistance.

[0013] <(A) Powder> The powder (hereinafter sometimes referred to as "component (A)") is not particularly limited and can be appropriately selected from powders used in cosmetics, etc., but metal oxides, powders having a hydrophobic surface, etc. are preferred. These may be used alone or in combination of two or more types.

[0014] The shape and size of component (A) are not particularly limited and can be selected appropriately depending on the purpose. Examples of the shape of component (A) include spherical, plate-like, petal-like, flake-like, rod-like, spindle-like, needle-like, and irregular shapes. The size of component (A) may be fine particles with an average particle diameter of about 1 μm or less, or may be pigment-grade.

[0015] <<Metal Oxide>> The metal oxide is not particularly limited and can be appropriately selected depending on the purpose. Examples include titanium oxide, iron oxide, magnesium oxide, zinc oxide, calcium oxide, zirconium oxide, aluminum oxide, chromium oxide, barium sulfate, and cerium oxide. These may be used alone or in combination of two or more. Furthermore, component (A) may be composite powder particles made of a plurality of these metal oxide materials.

[0016] <<Powder Having a Hydrophobic Surface>> The powder having a hydrophobic surface refers to a powder having low affinity for water. Specifically, the powder having a hydrophobic surface refers to a powder to which hydrophobicity has been imparted by surface-treating the component (A) with an oily component that has high affinity for the component (A).

[0017] In the oil-in-water cosmetic according to the embodiment, "hydrophobicity" is evaluated and determined by the following method: Ion-exchanged water and component (A) are placed in a transparent, sealed container and stored at 50°C for one day, after which a professional evaluator visually observes the powder to be evaluated, and evaluates the powder as hydrophobic if the majority of the powder to be evaluated is present on the surface of the ion-exchanged water.

[0018] Examples of powders having a hydrophobic surface include hydrophobic treated powders obtained by subjecting base powders to hydrophobic treatment, and ultraviolet scattering agents.

[0019] - Hydrophobized Powder - The hydrophobized powder is a powder obtained by subjecting a base powder to hydrophobization treatment.

[0020] The base powder is not particularly limited and can be appropriately selected depending on the purpose, and examples thereof include the above-mentioned metal oxides, inorganic powders other than the above-mentioned metal oxides, organic powders, silicone powders, inorganic pigments, organic pigments, metal powder pigments, etc. These may be used alone or in combination of two or more.

[0021] Examples of inorganic powders other than metal oxides include powders of carbon black, magnesium carbonate, calcium carbonate, chromium hydroxide, aluminum silicate, aluminum hydroxide, magnesium silicate, aluminum magnesium silicate, mica, synthetic mica, sericite, synthetic sericite, talc, kaolin, silicon carbide, barium sulfate, boron nitride, silica, zeolite, glass, and the like.

[0022] Examples of organic powders include metal soap powder, polyamide resin (nylon), polymethylsilsesquioxane, crosslinked organopolysiloxane polymer, polystyrene, polyurethane, polyethylene, polypropylene, polyethylene terephthalate, polymethacrylic acid esters such as polymethyl methacrylate, crosslinked polymethacrylic acid esters such as methyl methacrylate crosspolymer, complexes of polymethyl methacrylate and polyisoprene, polyacrylic acid esters, acrylonitrile-methacrylic acid copolymer powder, polytetrafluoroethylene, (HDI / PPG / polycaprolactone) crosspolymer, styrene and acrylic acid copolymer resin, polytetrafluoroethylene, cellulose, and the like.

[0023] Examples of metal soap powders include calcium laurate, magnesium laurate, lithium laurate, barium laurate, zinc laurate, calcium myristate, magnesium myristate, lithium myristate, barium myristate, zinc myristate, calcium palmitate, magnesium palmitate, lithium palmitate, barium palmitate, zinc palmitate, calcium stearate, magnesium stearate, lithium stearate, barium stearate, zinc stearate, and calcium isostearate. , magnesium isostearate, lithium isostearate, barium isostearate, zinc isostearate, calcium arachidate, magnesium arachidate, lithium arachidate, barium arachidate, zinc arachidate, calcium behenate, magnesium behenate, lithium behenate, barium behenate, zinc behenate, calcium lignocerate, magnesium lignocerate, lithium lignocerate, barium lignocerate, zinc lignocerate, calcium palmitoleate, magnesium palmitoleate, palm Lithium palmitoleate, barium palmitoleate, zinc palmitoleate, calcium oleate, magnesium oleate, lithium oleate, barium oleate, zinc oleate, calcium ricinoleate, magnesium ricinoleate, lithium ricinoleate, barium ricinoleate, zinc ricinoleate, calcium linoleate, magnesium linoleate, lithium linoleate, barium linoleate, zinc linoleate, calcium alpha-linolenate, magnesium alpha-linolenate, lithium alpha-linolenate, barium alpha-linolenate , zinc α-linolenate, calcium γ-linolenate, magnesium γ-linolenate, lithium γ-linolenate, barium γ-linolenate, zinc γ-linolenate, calcium arachidonate, magnesium arachidonate, lithium arachidonate, barium arachidonate, zinc arachidonate, EPA calcium, EPA magnesium, EPA lithium, EPA barium, EPA zinc, DHA calcium, DHA magnesium, DHA lithium, DHA barium, DHA zinc calcium undecylenate, magnesium undecylenate, lithium undecylenate,Examples of suitable thallates include barium undecylenate, zinc undecylenate, calcium thallate, magnesium thallate, lithium thallate, barium thallate, and zinc thallate.

[0024] Examples of crosslinked organopolysiloxane polymers include partially crosslinked methylpolysiloxanes such as (dimethicone / vinyldimethicone) crosspolymers, partially crosslinked methylphenylpolysiloxanes such as (dimethicone / phenyldimethicone) crosspolymers, partially crosslinked polyether-modified silicones such as dimethicone copolyol crosspolymers, partially crosslinked alkyl-modified silicones, and partially crosslinked alkyl-polyether-modified silicones such as (lauryldimethicone-PEG) crosspolymers. Specific examples of the crosslinked organopolysiloxane polymer include (dimethicone / vinyl dimethicone) crosspolymer, (dimethicone / phenyl vinyl dimethicone) crosspolymer, (dimethicone / vinyl dimethicone / methicone) crosspolymer, (dimethicone / lauryl dimethicone) crosspolymer, (diphenyl dimethicone / vinyl diphenyl dimethicone / silsesquioxane) crosspolymer, and (vinyl dimethicone / methicone silsesquioxane) crosspolymer.

[0025] Examples of inorganic pigments include inorganic white pigments such as titanium dioxide and zinc oxide; inorganic red pigments such as iron oxide (red iron oxide); inorganic yellow pigments such as yellow iron oxide and yellow ochre; inorganic black pigments such as black iron oxide and carbon black; inorganic green pigments such as chromium oxide, chromium hydroxide and cobalt titanate; and inorganic blue pigments such as ultramarine and iron blue.

[0026] Examples of organic pigments include zirconium lakes, barium lakes, and aluminum lakes 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.

[0027] Examples of metal powder pigments include pearl pigments, aluminum powder, copper powder, etc. Examples of pearl pigments include titanium oxide coated mica, colored titanium oxide coated mica, bismuth oxychloride, and fish scale foil.

[0028] The hydrophobic treatment agent applied to the base powder is not particularly limited and can be appropriately selected from powders used in cosmetics, etc. Examples include silicones, fluorines, amino acids, alkylalkoxysilanes, metal soaps, ester oils, phospholipids, glycolipids, etc. These may be used alone or in combination of two or more.

[0029] Examples of silicones as hydrophobic treatment agents include methylhydrogenpolysiloxane, dimethylpolysiloxane (dimethicone), methylphenylpolysiloxane, methylcyclopolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, octamethyltrisiloxane, tetradecamethylhexasiloxane, dimethylsiloxane-methyl(polyoxyethylene)siloxane-methyl(polyoxypropylene)siloxane copolymer, dimethylsiloxane-methyl(polyoxyethylene ... Examples of suitable silicone oils include silicone oils such as methyltriethoxysilane, ethyltriethoxysilane, hexyltriethoxysilane, octyltriethoxysilane, and triethoxycaprylylsilane; fluoroalkylsilanes such as trifluoromethylethyltrimethoxysilane and heptadecafluorodecyltrimethoxysilane; tetramethyltetrahydrogencyclotetrasiloxane; and trimethyltrihydrogencyclotrisiloxane.

[0030] Examples of fluorine compounds that can be used as hydrophobic treatment agents include perfluoroalkyl phosphate esters and perfluoroalcohols.

[0031] Examples of amino acids as hydrophobic treatment agents include amino acids, lipoamino acids, N-acyl glutamates such as dilauroyl glutamic acid lysine salt and stearoyl glutamate, and N-acyl lysine salt.

[0032] Examples of alkylalkoxysilanes used as hydrophobic treatment agents include octyltriethoxysilane and octyltrimethoxysilane.

[0033] Examples of metal soaps that can be used as hydrophobic treatment agents include stearic acid or its salts, and isostearic acid or its salts.

[0034] Examples of ester oils that can be used as hydrophobic treatment agents include polyglyceryl-2 tetraisostearate.

[0035] Examples of phospholipids as hydrophobic treatment agents include lecithin, hydrogenated lecithin, and alginic acid.

[0036] Examples of glycolipids that can be used as hydrophobic treatment agents include mannosylerythritol lipid.

[0037] -Ultraviolet Scattering Agent- The ultraviolet scattering agent is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include the metal oxides and inorganic powders other than the metal oxides exemplified above.

[0038] The component (A) may be synthesized by a known method or may be a commercially available product.

[0039] The content of component (A) in an oil-in-water cosmetic according to one embodiment is not particularly limited and can be selected appropriately depending on the purpose, but is preferably 25% by mass or less, more preferably 20% by mass or less, and even more preferably 10% by mass or less, relative to the total mass of the oil-in-water cosmetic. The lower limit of the content of component (A) is also not particularly limited, but is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, and even more preferably 1% by mass or more, relative to the total mass of the oil-in-water cosmetic. The upper and lower limits of the content of component (A) can be appropriately combined, and are preferably 0.01% by mass or more and 25% by mass or less, more preferably 0.1% by mass or more and 20% by mass or less, more preferably 0.1% by mass or more and 20% by mass or less, even more preferably 1% by mass or more and 10% by mass or less, relative to the total mass of the oil-in-water cosmetic. A content of component (A) of 25% by mass or less in an oil-in-water cosmetic according to one embodiment is preferred in that it provides good dispersibility and a refreshing feel when used. Furthermore, if the content of the component (A) in the oil-in-water cosmetic according to one embodiment is 0.01% by mass or more, it is preferable in terms of excellent UV protection effect.

[0040] <(B) Water-soluble Alkyl-substituted Polysaccharide Derivative> The water-soluble alkyl-substituted polysaccharide derivative (hereinafter, may be referred to as "component (B)") refers to a polysaccharide substituted with an alkyl group in the oil-in-water cosmetic composition according to one embodiment. Component (B) acts as a water-soluble thickener in the oil-in-water cosmetic composition according to one embodiment.

[0041] The "alkyl group" in component (B) is not particularly limited as long as it can impart hydrophobicity to component (B) and can be selected appropriately depending on the purpose, but is preferably an alkyl group having 1 to 35 carbon atoms, more preferably an alkyl group having 5 to 30 carbon atoms, even more preferably an alkyl group having 6 to 26 carbon atoms, still more preferably an alkyl group having 10 to 25 carbon atoms, and particularly preferably an alkyl group having 14 to 22 carbon atoms. Furthermore, the alkyl group in component (B) may be directly bonded to the polysaccharide or may be bonded to the polysaccharide as an indirect substituent.

[0042] The "polysaccharide" in component (B) refers to a compound in which multiple monosaccharides are bonded. The polysaccharide is not particularly limited and can be appropriately selected depending on the purpose, and examples thereof include sclerotium gum, gum arabic, alcaligenes-producing polysaccharide, cellulose, guar gum, carrageenan, hyaluronic acid, chondroitin sulfate, tuberose polysaccharide, Tremella fuciformis polysaccharide, locust bean gum, dextrin, chitosan, inulin, and starch.

[0043] The polysaccharide may be modified to allow alkyl groups to be attached. Examples of modifications to the polysaccharide include methyl cellulose, ethyl cellulose, propyl cellulose, butyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, carboxymethyl cellulose, carboxyethyl cellulose, and hydroxypropyl starch phosphate. The polysaccharide may be modified with one of these or with two or more of these. The polysaccharide may also be a hydroxypolysaccharide having one or more hydroxyl groups.

[0044] The number of sugars constituting the polysaccharide is not particularly limited as long as component (B) is water-soluble, and can be appropriately selected depending on the purpose. However, it is preferably 100 to 100,000, more preferably 100 to 10,000, and even more preferably 1,000 to 4,000.

[0045] Among these, component (B) is preferably a hydrophobically modified alkyl cellulose (hereinafter sometimes referred to as "hydrophobically modified alkyl cellulose"). Hydrophobically modified alkyl cellulose is a compound in which a long-chain alkyl group, which is a hydrophobic group, is introduced into a water-soluble cellulose ether derivative, and is represented by the following general formula (I). Among these, component (B) is more preferably a hydrophobically modified alkyl cellulose that has been hydrophobically modified with an alkyl group having 14 to 22 carbon atoms.

[0046] (In the general formula (I), each R is independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or —[CH ２ CH (CH ３)O]m-H (wherein m is an integer of 1 to 5, preferably an integer of 1 to 3), -CH ２ CH ２ OH, and -CH ２ CH(OH)CH ２ OR' (wherein R' represents an alkyl group having 14 to 22 carbon atoms), where R is -CH ２ CH(OH)CH ２ A has at least one -OR'. ２ ) q- (wherein q is an integer of 1 to 3, preferably 1), and n is an integer of 100 to 10,000, preferably an integer of 500 to 5,000).

[0047] In general formula (I), when R is "each independently," this means that two or more Rs may be the same or different.

[0048] Component (B) may be synthesized by a known method or may be a commercially available product. An example of a production method in which component (B) is a hydrophobically modified alkyl cellulose represented by general formula (I) will be described. The component (B) can be obtained by contacting a water-soluble cellulose ether derivative as the base with a compound for introducing a long-chain alkyl group having 14 to 22 carbon atoms in the presence of an alkali catalyst.

[0049] Examples of the water-soluble cellulose ether derivatives that serve as the base include methyl cellulose (where R is a hydrogen atom or a methyl group), ethyl cellulose (where R is a hydrogen atom or an ethyl group), propyl cellulose (where R is a hydrogen atom or a propyl group), butyl cellulose (where R is a hydrogen atom or a butyl group), and hydroxypropyl cellulose (where R is a hydrogen atom or a hydroxypropyl group (-[CH ２ CH (CH ３ )O]m-H (wherein m is an integer of 1 to 5, preferably an integer of 1 to 3), hydroxypropyl methylcellulose (wherein R is a hydrogen atom, a methyl group, or a hydroxypropyl group). Among these, hydroxypropyl methylcellulose is preferred as the water-soluble cellulose ether derivative. When hydroxypropyl methylcellulose is used, R in the general formula (I) is preferably a hydrogen atom, a methyl group, -[CH２ CH (CH ３ )O]m-H, and -CH ２ CH(OH)CH ２ OR', q of A is 1, and A is a methylene group.

[0050] Examples of compounds for introducing long-chain alkyl groups having 14 to 22 carbon atoms include long-chain alkyl glycidyl ethers represented by the following general formula (II):

[0051] (In general formula (II), R' represents an alkyl group having 14 to 22 carbon atoms.)

[0052] In the general formula (II), R' is an alkyl group having 14 to 22 carbon atoms, preferably an alkyl group having 14 to 20 carbon atoms, and more preferably a stearyl group having 18 carbon atoms (-C １８ H ３７ When R' is an alkyl group having 14 to 22 carbon atoms, the resulting hydrophobically modified alkyl cellulose has good emulsion stability.

[0053] -CH introduced into hydrophobically modified alkyl cellulose ２ CH(OH)CH ２ The content of OR' is not particularly limited, but is preferably about 0.1% by mass to 5.0% by mass relative to the total mass of the hydrophobically modified alkyl cellulose. ２ CH(OH)CH ２ In order to satisfy the preferred content of OR', the molar ratio, reaction time, type of alkali catalyst, etc., of the reaction between the water-soluble cellulose ester derivative and the long-chain alkyl glycidyl ether may be appropriately selected for production. After the reaction, the reaction product may be subjected to purification steps such as neutralization, filtration, washing, drying, and sieving.

[0054] The weight average molecular weight of the hydrophobically modified alkyl cellulose is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 100,000 to 1,000,000, more preferably 300,000 to 800,000, and even more preferably 550,000 to 750,000.

[0055] Commercially available products of component (B) include, for example, hydrophobically modified alkyl cellulose (weight average molecular weight (Mw) of 300,000 to 500,000, Sangelose (registered trademark) 60 series) and hydrophobically modified alkyl cellulose (weight average molecular weight (Mw) of 700,000 to 900,000, Sangelose (registered trademark) 90 series) (both manufactured by Daido Chemical Industry Co., Ltd.). These may be used alone or in combination of two or more.

[0056] The content of component (B) in the oil-in-water cosmetic according to one embodiment is not particularly limited and can be selected appropriately depending on the purpose, but is preferably 0.01% by mass to 1% by mass, more preferably 0.05% by mass to 0.5% by mass, and even more preferably 0.1% by mass to 0.3% by mass, relative to the total mass of the oil-in-water cosmetic. When the content of component (B) in the oil-in-water cosmetic according to one embodiment is 0.01% by mass to 1% by mass, sufficient emulsion stability can be obtained.

[0057] <(C) Polyglyceryl Polyricinoleate or (Polyglyceryl Isostearate / Dimer Dilinoleate) Copolymer> In a cosmetic according to one embodiment, either polyglyceryl polyricinoleate or (Polyglyceryl Isostearate / Dimer Dilinoleate) Copolymer (hereinafter, sometimes referred to as “component (C)”) is used as component (C).

[0058] <<Polyglyceryl Polyricinoleate>> Polyglyceryl polyricinoleate is an ester of polyglycerin-6 and a condensation product (condensed ricinoleic acid) in which ricinoleic acids, which are higher fatty acids having 18 carbon atoms, are ester-bonded to each other.

[0059] Polyglyceryl polyricinoleate may be appropriately synthesized by a known method, or a commercially available product may be used. Examples of commercially available polyglyceryl polyricinoleate include NIKKOL Decaglyn PR-20 (manufactured by Nikko Chemicals Co., Ltd.), and SY Glystar CR-310, CR-500, and CRS-75 (all manufactured by Sakamoto Pharmaceutical Industry Co., Ltd.).

[0060] <<Polyglyceryl Isostearate / Dimer Dilinoleic Acid Copolymer>> Polyglyceryl isostearate / dimer dilinoleic acid copolymer is a copolymer of polyglyceryl-2 isostearate and dilinoleic acid.

[0061] The (polyglyceryl isostearate / dimer dilinoleate) copolymer may be synthesized by a known method, or a commercially available product such as HiLucent ISDA (manufactured by Kokyu Alcohol Kogyo Co., Ltd.) may be used.

[0062] The content of component (C) in the oil-in-water cosmetic according to one embodiment is not particularly limited and can be selected appropriately depending on the purpose, but is preferably 0.5% by mass to 10% by mass, more preferably 2% by mass to 6% by mass, and even more preferably 3% by mass to 4% by mass, relative to the total mass of the oil-in-water cosmetic. When the content of component (C) in the oil-in-water cosmetic according to one embodiment is 0.5% by mass or more, the dispersibility of component (A) is good. Furthermore, when the content of component (C) in the oil-in-water cosmetic according to one embodiment is 10% by mass or less, the water resistance is good.

[0063] <Mass Ratio [(C) / (A)]> The mass ratio [(C) / (A)] of the content (% by mass) of (C) polyglyceryl polyricinoleate or (polyglyceryl isostearate / dimer dilinoleate) copolymer to the content (% by mass) of (A) powder is not particularly limited and can be selected appropriately depending on the purpose, but is preferably 0.1 or more and 2 or less, more preferably 0.1 or more and 1 or less, and even more preferably 0.5 or more and 1 or less. When the mass ratio [(C) / (A)] is 0.1 or more, the dispersibility of the (A) component is good. Furthermore, when the mass ratio [(C) / (A)] is 2 or less, the water resistance and UV protection effect are good.

[0064] <Other Components> A cosmetic preparation according to one embodiment may contain other components in addition to component (A), component (B), and component (C). The other components are not particularly limited and can be appropriately selected from known components used in cosmetics, and examples thereof include oils, higher alcohols, glycols, glycerins, sugar alcohols, sugars, solvents, surfactants, moisturizers, UV absorbers other than component (A), aqueous thickeners other than component (C), dispersants, preservatives, fragrances, and various drugs.

[0065] The content of other components in the oil-in-water cosmetic according to one embodiment is not particularly limited as long as it does not impair the effects of the oil-in-water cosmetic, and can be selected appropriately depending on the purpose.

[0066] <<Oil>> Examples of oils include ester oils, fats and oils, waxes, hydrocarbon oils, higher fatty acids, higher alcohols, silicone oils, oil-soluble drugs, etc. These may be used alone or in combination of two or more.

[0067] The ester oil is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include glyceryl tri-2-ethylhexanoate (glycerin triisooctanoate), pentaerythritol tetra-2-ethylhexanoate (pentaerythritol tetraoctanoate), glycerin triisopalmitate, octyl isopalmitate, isopropyl isostearate, isostearyl isostearate, isocetyl isostearate, hexyl isostearate, myristyl isostearate, isocetyl octanoate, cetyl isooctanoate, isostearyl octanoate, isodecyl isononanoate, octyldodecyl dimethyloctanoate, oleyl myristate, isostearyl erucate, and isostearic acid. Examples of the hydroxybenzoates include cetyl, octyl stearate, isostearyl palmitate, isocetyl palmitate, octyl palmitate, isostearyl myristate, isocetyl myristate, octyldodecyl myristate, decyl myristate, isopropyl palmitate, isopropyl myristate, trimethylolpropane triisostearate, neopentyl glycol dicaprate, dioctyl sebacate, octyldodecyl 12-stearoyloxystearate, dioctyldodecyl stearoyl glutamate, dioctyl adipate, diisostearyl malate, octyl methoxycinnamate, octyldodecyl lactate, isostearyl lactate, and octyl paradimethylaminobenzoate.

[0068] Examples of fats and oils include vegetable fats and oils such as avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed 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, cacao butter, coconut oil, hardened coconut oil, palm oil, palm kernel oil, and Japan wax kernel oil; and animal fats and oils such as egg yolk oil, horse tallow, beef tallow, mutton tallow, hardened beef tallow, lard, beef bone fat, and beef leg fat.

[0069] Examples of waxes include Japan wax, beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, privet wax, whale wax, montan wax, rice bran wax, lanolin, kapok wax, lanolin acetate, liquid lanolin, sugarcane wax, lanolin fatty acid isopropyl, hexyl laurate, reduced lanolin, jojoba wax, hard lanolin, and shellac wax.

[0070] Examples of hydrocarbon oils include linear, branched, and volatile hydrocarbon oils, such as liquid paraffin, squalane, isoparaffin, α-olefin oligomers, polybutene, microcrystalline wax, hydrogenated polydecene, and isohexadecane.

[0071] Examples of higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, 12-hydroxystearic acid, undecylenic acid, lanolin fatty acid, isostearic acid, linoleic acid, linolenic acid, and eicosapentaenoic acid.

[0072] Examples of higher alcohols include alcohols having 6 or more carbon atoms. Specific examples of higher alcohols include straight-chain or branched-chain higher alcohols such as lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, cetostearyl alcohol, monostearyl glycerin ether (batyl alcohol), 2-decyltetradecynol, 2-octyldodecanol, lanolin alcohol, cholesterol, phytosterol, hexyldodecanol, isostearyl alcohol, and octyldodecanol.

[0073] Examples of silicone oils include volatile cyclic silicones, volatile dimethylpolysiloxanes, and methylphenylsilicones.

[0074] Examples of oil-soluble drugs include fat-soluble vitamins such as vitamin A, retinol, retinol palmitate, benzyl nicotinate, dl-α-tocopherol nicotinate, vitamin D2, and tocopherol.

[0075] <<Higher Alcohols>> Examples of higher alcohols include saturated linear monohydric alcohols such as dodecanol (lauryl alcohol), tridodecanol, tetradodecanol (myristyl alcohol), pentadecanol, hexadecanol (cetyl alcohol), heptadecanol, octadecanol (stearyl alcohol), nonadecanol, icosanol (arachyl alcohol), heneicosanol, docosanol (behenyl alcohol), tricosanol, tetracosanol (carnaubyl alcohol), pentacosanol, and hexacosanol (ceryl alcohol); and unsaturated monohydric alcohols such as elaidyl alcohol.

[0076] <<Glycols>> Examples of glycols include propylene glycol, dipropylene glycol, 1,3-butylene glycol, 1,4-butylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, etc. These may be used alone or in combination of two or more.

[0077] <<Glycerins>> Examples of glycerins include glycerin, diglycerin, polyglycerin, etc. These may be used alone or in combination of two or more.

[0078] <<Sugar Alcohols>> Examples of sugar alcohols include sorbitol, mannitol, maltitol, xylitol, erythritol, etc. These may be used alone or in combination of two or more.

[0079] <<Sugars>> Examples of sugars include fructose, glucose, galactose, maltose, lactose, trehalose, etc. These may be used alone or in combination of two or more.

[0080] <<Solvent>> Examples of solvents include water and lower alcohols. Examples of lower alcohols include alcohols having 5 or fewer carbon atoms. Specific examples of lower alcohols include methanol, ethanol, propyl alcohol, isopropyl alcohol, 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1,3-propanediol, and diisopropyl sebacate. These may be used alone or in combination of two or more.

[0081] <<Surfactant>> Examples of surfactants include anionic surfactants, cationic surfactants, nonionic surfactants, amphoteric surfactants, etc. These may be used alone or in combination of two or more.

[0082] Examples of anionic surfactants include fatty acid soaps such as soap bases, sodium laurate, and sodium palmitate; higher alkyl sulfates such as sodium lauryl sulfate and potassium lauryl sulfate; alkyl ether sulfates such as polyoxyethylene (hereinafter sometimes abbreviated as "POE") triethanolamine lauryl sulfate and sodium POE lauryl sulfate; N-acylsarcosinates such as sodium lauroyl sarcosinate; higher fatty acid amide sulfonic acids such as sodium N-myristoyl-N-methyl taurate and sodium coconut oil fatty acid methyl tauride; phosphate ester salts such as POE stearyl ether phosphate; monolauroyl monoethanolamide POE sodium sulfosuccinate, lauryl polypropylene alkylbenzenesulfonates such as sodium glycol sulfosuccinate; alkylbenzenesulfonates such as sodium linear dodecylbenzenesulfonate and triethanolamine linear dodecylbenzenesulfonate; N-acylglutamates such as disodium N-stearoylglutamate and monosodium N-stearoylglutamate; higher fatty acid ester sulfates such as hydrogenated coconut oil fatty acid glycerin sodium sulfate; sulfated oils such as turmeric oil; POE alkyl ether carboxylic acids; POE alkyl allyl ether carboxylates; higher fatty acid ester sulfonates; secondary alcohol sulfates; higher fatty acid alkylolamide sulfates; sodium lauroyl monoethanolamide succinate; and sodium caseinate.

[0083] Examples of cationic surfactants include alkyltrimethylammonium salts such as stearyltrimethylammonium chloride and lauryltrimethylammonium chloride; dialkyldimethylammonium salts such as distearyldimethylammonium chloride; alkylpyridinium salts such as cetylpyridinium chloride; alkyl quaternary ammonium salts; alkyldimethylbenzylammonium salts; alkylisoquinolinium salts; dialkylmorphonium salts; POE alkylamines; alkylamine salts; polyamine fatty acid derivatives; amyl alcohol fatty acid derivatives; and benzalkonium chloride.

[0084] Examples of nonionic surfactants include polyethylene glycol fatty acid esters, polyoxyethylene fatty acid glyceryl, polyoxyethylene-methylpolysiloxane copolymers, fatty acid polyoxyethylene sorbitan, polyoxyethylene alkyl ethers, maltitol hydroxy aliphatic alkyl ethers, alkylated polysaccharides, alkyl glucosides, sucrose fatty acid esters, polyoxyethylene hydrogenated castor oil glyceryl, polyoxyethylene sorbit fatty acid esters, polyoxyethylene-polyoxypropylene block copolymers, tetrapolyoxyethylene-tetrapolyoxypropylene-ethylenediamine condensates, polyoxyethylene-beeswax-lanolin derivatives, alkanolamides, polyoxyethylene-propylene glycol fatty acid esters, polyoxyethylene-alkylamines, polyoxyethylene-fatty acid amides, alkylethoxydimethylamine oxide, and trioleyl phosphate.

[0085] Examples of amphoteric surfactants include imidazoline-based amphoteric surfactants such as 2-cocoyl-2-imidazolinium hydroxide-1-carboxyethyloxy disodium salt; and betaine-based surfactants such as amidobetaine and sulfobetaine.

[0086] <<Moisturizing Agent>> Examples of moisturizing agents include polyethylene glycol (hereinafter sometimes abbreviated as "PEG"), sodium chondroitin sulfate, sodium hyaluronate, sodium lactate, glucosamine, cyclodextrin, etc. In addition, the glycols, glycerins, sugar alcohols, and sugars can also be used as moisturizing agents. These may be used alone or in combination of two or more.

[0087] <<Aqueous Thickeners Other Than Component (B)>> Examples of aqueous thickeners include natural water-soluble polymers, semi-synthetic water-soluble polymers, synthetic water-soluble polymers, inorganic thickeners, etc. These may be used alone or in combination of two or more.

[0088] Examples of natural water-soluble polymers include plant-derived polymers such as gum arabic, tragacanth gum, galactan, guar gum, carrageenan, pectin, quince seed extract, agar, and brown algae powder; microbial-derived polymers such as xanthan gum, dextran, pullulan, and succinoglycan; and animal-derived polymers such as collagen, casein, albumin, and gelatin.

[0089] Examples of semi-synthetic water-soluble polymers include starch-based polymers such as carboxymethyl starch and methylhydroxy starch; and alginic acid-based polymers such as sodium alginate and propylene glycol alginate.

[0090] Examples of synthetic water-soluble polymers include vinyl polymers such as polyvinyl alcohol, polyvinyl acetate, polyvinyl methyl ether, polyvinylpyrrolidone, vinylpyrrolidone and vinyl acetate copolymers, and carboxyvinyl polymers; and acrylic polymers such as sodium polyacrylate, polyethyl acrylate, polyacrylamide, acrylic acid / alkyl methacrylate copolymers (e.g., (acrylates / alkyl acrylate (C10-30)) crosspolymers, etc.), polyacrylic acid alkanolamine, alkyl methacrylate and dimethylaminoethyl methacrylate copolymers, poly 2-acrylamido-2-methylpropanesulfonic acid, polymethacryloyloxytrimethylammonium, (acryloyldimethyltaurine ammonium / VP) copolymer, (dimethylacrylamide / acryloyldimethyltaurine Na) copolymer, and (dimethylacrylamide / acryloyldimethyltaurine Na) crosspolymer.

[0091] Examples of inorganic thickeners include bentonite, laponite, hectorite, aluminum magnesium silicate, and silicic anhydride.

[0092] <<UV Absorbers Other than Component (A)>> Examples of UV absorbers other than component (A) include benzoic acid-based UV absorbers such as para-aminobenzoic acid; anthranilic acid-based UV absorbers such as methyl anthranilate; salicylic acid-based UV absorbers such as octyl salicylate; cinnamic acid-based UV absorbers such as isopropyl paramethoxycinnamate, octyl paramethoxycinnamate, and ethylhexyl methoxycinnamate; UV absorbers such as urocanic acid and ethyl urocanate, benzophenone-based UV absorbers such as 2-hydroxy-4-methoxybenzophenone and dihydroxybenzophenone, benzotriazole-based UV absorbers, and 2-phenylbenzimidazole-5-sulfonic acid. These may be used alone, or two or more may be used in combination.

[0093] <<Dispersant>> Examples of dispersants include sorbitan sesquiisostearate, isostearic acid, palmitic acid, silicone surfactants, etc. These may be used alone or in combination of two or more.

[0094] <<Preservatives>> Examples of preservatives include benzoic acid, salicylic acid, paraoxybenzoic acid esters (e.g., methylparaben, ethylparaben, butylparaben, etc.), sorbic acid, parachlormetacresol, hexachlorophene, benzalkonium chloride, chlorhexidine chloride, trichlorocarbanilide, photosensitizers, phenoxyethanol, etc. These may be used alone or in combination of two or more.

[0095] <<Fragrances>> Examples of fragrances include natural fragrances obtained from animals or plants, synthetic fragrances produced by chemical synthesis, and compound fragrances which are mixtures thereof. Specific examples of fragrances include acetibenol, anisaldehyde, anethole, amyl acetate, amyl salicylate, allyl amyl glycolate, allyl caproate, aldehydes C6 to C20, ambrettolide, ambroxan, ionone, isoe super, eugenol, auranthiol, galaxolide, calone, coumarin, geraniol, geranyl acetate, sandalore, santalol, sandera, cyclamen aldehyde, cis-3-hexenyl acetate, cis-3 -Hexenol, citral, citronellyl acetate, citronellol, cineole, dihydromyrcenol, jasmolactone, cinnamic alcohol, cinnamic aldehyde, styrallyl acetate, cedryl acetate, cedrol, damascone, damascenone, decalactone, terpinyl acetate, terpineol, tonalid, triplal, nerol, bacdanol, vanillin, hydroxycitronellal, phenylethyl acetate, phenylethyl alcohol, hexyl Salicylate, Vetiveryl Acetate, Hedione, Heliotropin, Helional, Vertofix, Benzyl Acetate, Benzyl Salicylate, Benzyl Benzoate, Pentalid, Bornyl Acetate, Myall, Musk Ketone, Methyl Anthranilate, Methyl Dihydrojasmonate, Yara Yara, Lime Oxide, Linalyl Acetate, Linalool, Limonene, Lyral, Lilial, Rose Oxide, Rhodinol, Angelica Oil, Anise Oil, Almoise Oil, Basil Oil Ile, bay oil, bergamot oil, calamus oil, camphor oil, cananga oil, cardamom oil, cassia oil, cedarwood oil, celery oil, chamomile oil, cinnamon oil, clove oil, coriander oil, cumin oil, dill oil, elemi oil, estragon oil, eucalyptus oil, fennel oil, fenugreek oil, galbanum oil, geranium oil, ginger oil, grapefruit oil, gayac wood oil, cypress oil,Cypress oil, juniper berry oil, lavandin oil, lavender oil, lemon oil, lime oil, mandarin oil, ziram oil, fir oil, peppermint oil, spearmint oil, millet oil, myrtle oil, nutmeg oil, oakmoss oil, olibanum oil, opoponax oil, orange oil, parsley oil, patchouli oil, pepper oil, perilla oil, petitgrain oil, neroli oil, orange flower oil, pimento oil, allspice oil, pine oil, rose oil, rosemary oil, clary Examples of such oils include sage oil, sandalwood oil, styrax oil, tagetes oil, thyme oil, tuberose oil, valerian oil, vetiver oil, violet leaf oil, wintergreen oil, wormwood oil, ylang-ylang oil, yuzu oil, cassie absolute, genet absolute, hyacinth absolute, inmortelle absolute, jasmine absolute, jonquil absolute, narcissus absolute, rose absolute, violet leaf absolute, and benzoin. These may be used alone or in combination of two or more.

[0096] <<Drug>> Examples of the drug include ascorbic acid (vitamin C), tranexamic acid, kojic acid, ellagic acid, arbutin, alkoxysalicylic acid, nicotinamide, glycyrrhizinic acid, tocopherol, retinol, and salts or derivatives thereof. These may be used alone or in combination of two or more.

[0097] Examples of the derivatives include sodium L-ascorbate, magnesium L-ascorbate, L-ascorbic acid glucoside, 2-O-ethyl-L-ascorbic acid, 3-O-ethyl-L-ascorbic acid, sodium 4-methoxysalicylate, potassium 4-methoxysalicylate, dipotassium glycyrrhizinate, stearyl glycyrrhizinate, tocopherol acetate, retinol acetate, and retinol palmitate.

[0098] [Production Method] The method for producing the oil-in-water cosmetic according to one embodiment is not particularly limited and can be appropriately selected from known methods for producing oil-in-water emulsion compositions. A specific example of a method for producing the oil-in-water cosmetic according to one embodiment involves mixing water with component (B) and an aqueous component among the other components to prepare an aqueous phase. Next, component (A) and component (C) are mixed with a water-insoluble component among the other components to prepare an oil phase. Next, the oil phase is added to the aqueous phase and stirred to produce the oil-in-water cosmetic according to one embodiment.

[0099] [Uses] The uses of the oil-in-water cosmetic composition according to one embodiment are not particularly limited and can be appropriately selected depending on the purpose, and examples thereof include cosmetics for skin care such as lotions, creams, emulsions, and serums; makeup cosmetics such as foundations and makeup bases; sunscreen cosmetics; suntan cosmetics; skin cleansing cosmetics such as facial cleansers and makeup removers; and ointments. The oil-in-water cosmetic composition according to one embodiment may also be used in the form of being impregnated into a substrate such as a pack. Among these, the oil-in-water cosmetic composition according to one embodiment is preferably used as a sunscreen cosmetic composition because it has excellent water resistance, dispersibility, and UV protection properties and a refreshing feel when used.

[0100] The following examples and comparative examples will explain the embodiments in more detail, but the embodiments are not limited to these examples and comparative examples. In the examples and comparative examples, unless otherwise specified, the blending amounts are expressed as "mass %" relative to the total mass of the oil-in-water cosmetic, and all values ​​are converted into pure contents. The mass ratio [(C) / (A)] was rounded to one decimal place.

[0101] (Examples 1 to 4) The components were mixed according to the composition and content (mass%) shown in Table 1 below, and the oil-in-water cosmetics of Examples 1 to 4 were prepared by a conventional method. Specifically, first, component (B) and the water-soluble components among the other components were dissolved in water to prepare an aqueous phase. Next, component (A) and component (C) were mixed with the water-insoluble components among the other components to prepare an oil phase. Finally, the oil phase was added to the aqueous phase and stirred to obtain the oil-in-water cosmetics of Examples 1 to 4.

[0102] (Comparative Examples 1 to 3) The components were mixed according to the composition and content (mass%) shown in Table 2 below, and oil-in-water cosmetics of Comparative Examples 1 to 3 were prepared by a conventional method. Specifically, first, component (B) and the water-soluble components among the other components were dissolved in water to prepare an aqueous phase. Next, comparative components (A) and (C) and the water-insoluble components among the other components were mixed to prepare an oil phase. Finally, the oil phase was added to the aqueous phase and stirred to obtain the oil-in-water cosmetics of Comparative Examples 1 to 3.

[0103] The oil-in-water cosmetics of Examples 1 to 4 and Comparative Examples 1 to 3 were evaluated for "water resistance," "dispersibility," "UV protection effect," and "moisture" by the following methods. The evaluation results are shown in Tables 1 and 2 below.

[0104] <Evaluation of Water Resistance> Using the oil-in-water cosmetics of Examples 1 to 4 and Comparative Examples 1 to 3 as measurement samples, water resistance was evaluated by the following method. The measurement sample was applied to a plate (S plate) (5 cm x 5 cm V-grooved PMMA plate, SPFMASTER-PA01, manufactured by Fuji Kasei Co., Ltd.) at a concentration of 2 mg / cm ２A drop of 1000 ml ... Therefore, the rate of change in absorbance before and after water bathing was evaluated as "water resistance." [Equation (1)] Rate of change in absorbance before and after water bathing (%) = (integrated absorbance value after water bathing) / (integrated absorbance value before water bathing) × 100

[0105] <Evaluation of Dispersibility> Using the oil-in-water cosmetics of Examples 1 to 4 and Comparative Examples 1 to 3 as measurement samples, dispersibility was evaluated by the following method. The measurement sample was placed in the sample loading section of a stress-controlled rheometer (manufactured by Anton Paar), and the sample was spun at 30°C at a shear rate of 0.1 s using a cone-plate type jig (CP50-1). －１ From 1,000S －１ The shear viscosity was calculated based on the following formula (2), and a flow curve showing the relationship between shear viscosity and shear rate was obtained. －１ and 1,000S －１ The viscosity values ​​η (10 / S) and η (1,000 / S) at the shear rate were used to calculate the viscosity decay rate according to the following formula (3). The smaller the viscosity decay rate, the smaller the degree of viscosity change with increasing shear rate, and the higher the powder dispersibility can be evaluated. Therefore, the dispersibility of the powder was evaluated based on the following criteria using the calculated viscosity decay rate. [Formula (2)] Apparent viscosity (η) = shear stress (τ) / shear rate (γ)

[0106] - Dispersibility criteria - A: Viscosity damping ratio is 0.2 or less B: Viscosity damping ratio is more than 0.2 and 0.4 or less C: Viscosity damping ratio is more than 0.4 and 0.7 or less D: Viscosity damping ratio is more than 0.7

[0107] <Evaluation of UV Protection Effect> The oil-in-water cosmetics of Examples 1 to 4 and Comparative Examples 1 to 3 were used as measurement samples and the UV protection effect was evaluated by the following method. The measurement sample was applied to a plate (S plate) (5 cm x 5 cm V-grooved PMMA plate, SPFMASTER-PA01, manufactured by Fuji Kasei Co., Ltd.) at a concentration of 2 mg / cm ２ was dropped onto the plate in an amount of 100 ml, applied with a finger for 60 seconds, and dried for 15 minutes. The absorbance at 280 nm to 500 nm of the plate to which the measurement sample had been added was then measured using a spectrophotometer (U-3500 self-recording spectrophotometer, manufactured by Hitachi, Ltd.). Using an unapplied measurement sample as a control, the absorbance (Abs) was calculated based on the following formula (4). The higher the absorbance (Abs) value at 290 nm, the higher the UV protection effect can be evaluated. The UV protection effect was evaluated based on the calculated absorbance and the following criteria: [Formula (4)] Abs = -log(T / T ０ ) (where, in formula (4), "T" represents the transmittance of the measurement sample, and "T ０ " indicates the transmittance of the control.) - Criteria for determining UV protection effect - A: The absorbance (Abs) value at 290 nm is 1 or more. B: The absorbance (Abs) value at 290 nm is less than 1.

[0108] <Evaluation of Moisture> The oil-in-water cosmetics of Examples 1 to 4 and Comparative Examples 1 to 3 were evaluated for moisture when applied to the skin using the following method. A panel of 20 cosmetic evaluation specialists evaluated the moisture when the oil-in-water cosmetics were applied to their arms based on the following evaluation criteria. The average score of the 20 cosmetic evaluation specialist panels was calculated and judged based on the following judging criteria. - Moisture evaluation criteria - 2 points: Moisture-rich 1 point: Slightly moisturizing 0 points: No moisture-rich - Moisture judgment criteria - A: Average score of 1.75 points or more, and no cosmetic evaluation specialist panelists gave a score of 0 B: Average score of 1.5 points or more but less than 1.75 points, and 2 or fewer cosmetic evaluation specialist panelists gave a score of 0 C: Average score of 1.0 points or more but less than 1.5 points D: Average score of less than 1.0 point

[0109]

[0110]

[0111] The ingredients used in the examples and comparative examples are as follows: Hydrophobized titanium oxide: hydrogen dimethicone-treated titanium oxide (manufactured by Sakai Chemical Industry Co., Ltd.) Stearoxyhydroxypropylmethylcellulose: Sangelose 90L (manufactured by Daido Chemical Industry Co., Ltd.) (Polyglyceryl-2 isostearate / dimer dilinoleate) copolymer: Hilucent ISDA (manufactured by Kokyu Alcohol Kogyo Co., Ltd.) Polyglyceryl-6 polyricinoleate: SY Glystar CR-75 (manufactured by Sakamoto Pharmaceutical Industry Co., Ltd.) Dimethicone: viscosity at 25°C of 1.35 mm ２ / s ~ 1.65 mm ２ Dimethicone / s Polyglyceryl-2 diisostearate: WOGEL-18DV (manufactured by Matsumoto Fine Chemical Co., Ltd.) Sorbitan sesquiisostearate: Estemol 182V (manufactured by Nisshin Oillio Group, Inc.) Polyhydroxystearic acid: HS Oligomer 600 (manufactured by Nikko Chemicals Co., Ltd.)

[0112] Examples of aspects of the present invention include the following. <1> An oil-in-water cosmetic comprising: (A) a powder; (B) a water-soluble alkyl-substituted polysaccharide derivative; and (C) polyglyceryl polyricinoleate or polyglyceryl isostearate / dimer dilinoleate copolymer. <2> The oil-in-water cosmetic according to <1> above, in which the (A) powder is a metal oxide. <3> The oil-in-water cosmetic according to <1> or <2> above, in which the (A) powder is a powder having a hydrophobic surface. <4> The oil-in-water cosmetic according to <3> above, in which the powder having a hydrophobic surface is an ultraviolet scattering agent. <5> The oil-in-water cosmetic according to any one of <1> to <4> above, in which the (B) water-soluble alkyl-substituted polysaccharide derivative is a hydrophobically modified alkyl cellulose. <6> The oil-in-water cosmetic according to any one of <1> to <5>, wherein the mass ratio [(C) / (A)] of the content of the polyglyceryl polyricinoleate or polyglyceryl isostearate / dimer dilinoleate copolymer (C) to the content of the powder (A) is 0.1 or more and 2 or less. <7> The oil-in-water cosmetic according to any one of <1> to <6>, which is a sunscreen cosmetic.

[0113] As described above, the present invention has been described based on specific embodiments and examples, but these embodiments and examples are presented merely as examples, and the present invention is not limited to the above embodiments and examples. The above embodiments can be embodied in various other forms, and various combinations, omissions, substitutions, additions, modifications, etc. can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, and are also included in the inventions described in the claims and their equivalents.

[0114] This international application claims priority based on Japanese Patent Application No. 2023-220009, filed on December 26, 2023, the entire contents of which are incorporated herein by reference.

Claims

1. An oil-in-water type cosmetic characterized by containing (A) a powder, (B) a water-soluble alkyl-substituted polysaccharide derivative, and (C) polyglyceryl polyricinoleate or a (polyglyceryl isostearate / dimer dilinoleate) copolymer.

2. The oil-in-water type cosmetic according to claim 1, wherein the (A) powder is a metal oxide.

3. The oil-in-water type cosmetic according to claim 1, wherein the (A) powder is a powder having a hydrophobic surface.

4. The oil-in-water type cosmetic according to claim 3, wherein the powder having a hydrophobic surface is an ultraviolet scattering agent.

5. The oil-in-water type cosmetic according to claim 1, wherein the (B) water-soluble alkyl-substituted polysaccharide derivative is a hydrophobically modified alkyl cellulose.

6. The oil-in-water type cosmetic according to claim 1, wherein the mass ratio [(C) / (A)] of the content of the polyglyceryl polyricinoleate or the (polyglyceryl isostearate / dimer dilinoleate) copolymer (C) to the content of the (A) powder is 0.1 or more and 2 or less.

7. The oil-in-water type cosmetic according to claim 1, which is a sunscreen cosmetic.

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