Oily liquid cosmetic

Abstract

To provide an oily liquid cosmetic having excellent temporal stability and exhibiting superior properties in both thickness upon application and smoothness in spreading.SOLUTION: An oily liquid cosmetic comprising the following components (A)-(C): (A) an oil-soluble polyurethane, (B) fumed silica, and (C) a dextrin fatty acid ester in which a fatty acid moiety is derived from a mixed fatty acid of branched saturated fatty acid and linear saturated fatty acid.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to an oily liquid cosmetic preparation. [Background technology]

[0002] Oil-based liquid cosmetics are widely used as skin care cosmetics because they have high affinity to the skin, are easy to use, have high moisturizing power, and have long-lasting cosmetic effects.

[0003] The thickness of a cosmetic product, which maintains its shape when applied to the skin and allows users to feel the presence of the cosmetic product on the skin, is one of the sensory evaluation criteria preferred by users. By adding viscosity to an oil-based liquid cosmetic product, a thick feel can be easily achieved. Patent Document 1 states that by combining the oil-soluble polyurethane polyurethane-79 and bis-ethylhexyl bis-oleyl pyromellitamide in an oil-based formulation, stability over time and a rich feel with thick spreadability can be achieved. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2021-155386 Summary of the Invention [Problem to be solved by the invention]

[0005] As disclosed in Patent Document 1, a thick feel can be easily obtained in oil-based preparations by adding an oil-soluble polyurethane resin such as polyurethane-79 to impart viscosity. However, oil-based cosmetics that have been given viscosity can suffer from a phenomenon known as sweating and oil separation, in which liquid oil oozes out in droplets onto the surface of the oil-based cosmetic over time. Furthermore, while imparting viscosity can easily give a thick feel, the thickness remains even when the cosmetic is further spread, making it difficult to obtain a cosmetic that is sufficient in terms of smoothness of spreadability.

[0006] Therefore, an object of the present invention is to provide an oily liquid cosmetic preparation in an oily liquid dosage form that has excellent stability over time and is excellent in both initial thickness and smooth spreadability.

[0007] Another object of the present invention is to provide an oily liquid cosmetic that has high skin penetration. [Means for solving the problem]

[0008] In order to achieve the above object, the oily liquid cosmetic of the present invention has the following composition.

[0009] 1. The following ingredients (A) to (C) (A): Oil-soluble polyurethane (B): Fumed silica (C): Dextrin fatty acid ester, the fatty acid moiety of which is derived from a mixture of branched saturated fatty acids and straight-chain saturated fatty acids. An oily liquid cosmetic comprising:

[0010] 2. The oily liquid cosmetic according to 1., further comprising component (D) a malic acid alkyl ester having one or two hydroxyl groups in the molecule and / or a glycerin fatty acid ester having one or two hydroxyl groups in the molecule.

[0011] 3. The oil-based liquid cosmetic according to 1. or 2., wherein the content of component (A) in the oil-based liquid cosmetic is 0.0005 to 3% by mass.

[0012] 4. The oily liquid cosmetic preparation according to any one of 1. to 3., having a viscosity at 20°C of 100 to 50,000 mPa·s.

[0013] 5. The oily liquid cosmetic preparation according to any one of 1. to 4., wherein the component (C) is dextrin palmitate / ethylhexanoate. [Effects of the Invention]

[0014] The oil-based liquid cosmetic composition of the present invention has excellent stability over time, and is excellent in both initial thickness and smooth spreadability. Furthermore, the oil-based liquid cosmetic composition of the present invention has high skin penetration. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, embodiments of the present invention will be described. However, the present invention is not limited to only the following embodiments. In this specification, the range "X to Y" includes X and Y and means "X or more and Y or less." Furthermore, unless otherwise specified, operations and measurements of physical properties are performed under conditions of room temperature (20 to 25°C) and relative humidity of 45 to 55% RH. Furthermore, in this specification, when a certain component contains two or more types, the content of the component refers to the total amount of the two or more types.

[0016] The present invention provides an oil-based liquid cosmetic (hereinafter also simply referred to as cosmetic) containing the following components (A) to (C): (A): oil-soluble polyurethane, (B): fumed silica, and (C): a dextrin fatty acid ester in which the fatty acid moiety is derived from a mixed fatty acid of a branched saturated fatty acid and a linear saturated fatty acid.

[0017] As described above, the incorporation of viscosity-imparting components in oil-based cosmetics tends to reduce stability over time. Furthermore, while adding viscosity can easily provide a thick feel, it also makes it difficult to achieve the smooth spreadability that liquid cosmetics possess. In other words, there is generally a trade-off between initial thickness and smooth spreadability. By combining components (A) to (C), the present invention achieves both initial thickness and good spreadability in a liquid cosmetic while ensuring stability over time. As shown in the comparative examples described below, the absence of any of components (A) to (C) does not provide the above-described effect. Furthermore, the same effect is not achieved when a component other than a dextrin fatty acid ester derived from mixed fatty acids is used in place of component (C).

[0018] Each component in the cosmetic will be described below.

[0019] (Component (A): Oil-soluble polyurethane) The oil-soluble polyurethane of component (A) refers to, for example, one that is soluble in at least 1 part by mass in 100 parts by mass of cetyl 2-ethylhexanoate at 100° C. The polyurethane may be soluble in an amount of 5 parts by mass or more, 10 parts by mass or more, 5 to 50 parts by mass, or 10 to 50 parts by mass in 100 parts by mass of cetyl 2-ethylhexanoate at 100° C. The oil-solubility of the polyurethane allows it to exhibit a thickening effect in oil-based preparations.

[0020] The oil-soluble polyurethane has a urethane bond and contains structural units derived from an isocyanate compound and structural units derived from a polyol, preferably a low-molecular-weight polyol having a molecular weight of 500 or less.

[0021] The structure of the oil-soluble polyurethane is not particularly limited, but it is preferable that the polyurethane has (a1) a hydrophobic portion and (a2) a hydrophilic portion.

[0022] In a preferred embodiment, component (A) is a polyurethane having a hydrophobic portion (a1) and a hydrophilic portion (a2), wherein the hydrophobic portion (a1) contains a structural unit derived from an isocyanate compound, and the hydrophilic portion (a2) contains a structural unit derived from a low-molecular-weight polyol (preferably having a molecular weight of 500 or less). Component (A) may also contain a structural unit derived from an isocyanate compound, a structural unit derived from a hydrogenated polyolefin polyol, a structural unit derived from a dimer diol, and a structural unit derived from a low-molecular-weight polyol.

[0023] The (a1) hydrophobic portion preferably contains a structural unit derived from an isocyanate compound, such as 1,6-hexamethylene diisocyanate, 1,3-bis(isocyanatomethyl)benzene, 1,3-bis(isocyanatomethyl)cyclohexane, 2,4-toluene diisocyanate, or 2,6-toluene diisocyanate. Of these, 1,6-hexamethylene diisocyanate is preferred.

[0024] The (a1) hydrophobic portion preferably further contains a structural unit derived from a hydrogenated polyolefin polyol. Examples of the hydrogenated polyolefin polyol include hydrogenated polybutadiene polyol, hydrogenated polyisoprene polyol, and hydrogenated polybutanediol, with hydrogenated polybutanediol being preferred.

[0025] The (a1) hydrophobic portion preferably further contains a structural unit derived from a dimer diol. Examples of dimer diols include dimer dilinoleyl alcohol and dimer dioleyl alcohol, with dimer dilinoleyl alcohol being preferred and hydrogenated dimer dilinoleyl alcohol being particularly preferred.

[0026] The (a2) hydrophilic portion preferably contains a structural unit derived from a low-molecular-weight polyol. Examples of low-molecular-weight polyols include ethylene glycol, propylene glycol, 1,3-butylene glycol, 1,4-butylene glycol, diethylene glycol, and trimethylolpropane. Ethylene glycol and 1,4-butylene glycol are preferred, and 1,4-butylene glycol is more preferred. The low-molecular-weight polyol may be partially modified.

[0027] The weight average molecular weight (Mw) of the oil-soluble polyurethane may be 10,000 to 150,000, 15,000 to 130,000, or 20,000 to 110,000.

[0028] The oil-soluble polyurethane may be dispersed or dissolved in a dispersing solvent such as an oil. The dispersing solvent is not particularly limited, but examples thereof include alcohols and oils, and one or more of these may be used in combination.

[0029] Examples of alcohols used as dispersion solvents include lower alcohols such as ethanol and isopropanol, glycols such as propylene glycol, 1,3-butylene glycol, dipropylene glycol and polyethylene glycol, and glycerols such as glycerin, diglycerin and polyglycerin.In addition, examples of oils used in dispersion solvents include hydrocarbon oils such as dodecane, isododecane, tridecane, isotridecane, tetradecane, isotetradecane, isopentadecane, isohexadecane, liquid isoparaffin, squalane, hydrogenated polydecene, and hydrogenated polyisobutene, 2-ethylhexyl stearate, octyldodecyl isonoisostearate, isostearyl isostearate, 2-ethylhexyl isostearate, isopropyl isostearate, cetyl palmitate, 2-ethylhexyl palmitate, isopropyl palmitate, myristyl palmitate, and the like. Octyldodecyl phosphate, isostearyl myristate, myristyl myristate, isopropyl myristate, isostearyl laurate, hexyl laurate, octyldodecyl ricinoleate, isotridecyl isononanoate, isononyl isononanoate, stearyl 2-ethylhexanoate, isostearyl 2-ethylhexanoate, cetyl 2-ethylhexanoate, hexyldecyl 2-ethylhexanoate, cetyl caprate, cetyl caprylate, octyldodecyl neopentanoate, isostearyl neopentanoate, octyldodecyl oleate, olein Oleyl Acetate, Ethyl Oleate, Octyldodecyl Erucate, Octyldodecyl Stearoyl Stearate, Isostearyl Stearoyl Stearate, Dioctyldodecyl Stearoyl Glutamate, Dioctyldodecyl Lauroyl Glutamate, Propylene Glycol Dicaprate, Neopentyl Glycol Dicaprate, Dipentaerythrityl Tetraisostearate, Diisostearyl Malate, Tridecyl Trimellitate, Polyglyceryl Isostearate, Polyglyceryl Diisostearate, Polyglyceryl Triisostearate Examples of suitable glyceryl esters include glyceryl triisostearate, polyglyceryl tetraisostearate, decaglyceryl decaisostearate, decaglyceryl deca-2-ethylhexanoate, caprylic / capric triglyceride, glyceryl tri-2-ethylhexanoate, glyceryl triisostearate, and glyceryl trioleate; vegetable oils such as coconut oil, olive oil, palm oil, macadamia nut oil, meadowfoam oil, jojoba oil, rapeseed oil, and rice bran oil; and higher alcohols such as octyldodecanol, isostearyl alcohol, oleyl alcohol, and jojoba alcohol.Among these, the oil-soluble polyurethane is preferably a dispersion in an oil agent, more preferably a dispersion in an ester oil, and even more preferably a dispersion in caprylic / capric triglyceride. The dispersion of oil-soluble polyurethane in an oil agent or the like refers to a state in which the oil-soluble polyurethane is stably dispersed or dissolved in the oil agent or the like. The solids concentration of the oil-soluble polyurethane dispersion is not particularly limited, but may be, for example, 5 to 50% by mass, or 10 to 40% by mass.

[0030] Examples of commercially available products of component (A) include Oilkemia 5S polymer (Rubrizol, INCI name: caprylic / capric triglyceride, polyurethane-79) and Oilkemia 5S CC polymer (Rubrizol, INCI name: caprylic / capric triglyceride, hydrogenated polyolefin (C6-20), (HDI / trimethylolhexyllactone) crosspolymer). Thus, for example, mixtures containing component (A) may include a mixture of caprylic / capric triglyceride and polyurethane-79, a mixture of caprylic / capric triglyceride, hydrogenated polyolefin (C6-20), and (HDI / trimethylolhexyllactone) crosspolymer, and mixtures thereof.

[0031] The content of component (A) in the cosmetic is preferably 0.0005% by mass or more, 0.001% by mass or more, 0.002% by mass or more, or 0.005% by mass or more, from the viewpoints of stability over time, smoothness of spread, and the like. Furthermore, the content of component (A) in the cosmetic is preferably 3% by mass or less, 1% by mass or less, 0.5% by mass or less, or 0.2% by mass or less, from the viewpoints of stability over time, smoothness of spread, and penetration feeling, and the like. The content of component (A) in the cosmetic is preferably 0.0005 to 3% by mass, 0.0005 to 1% by mass, 0.001 to 1% by mass, 0.002 to 0.5% by mass, or 0.005 to 0.2% by mass.

[0032] (Component (B): Fumed silica) Fumed silica is fine amorphous silica of 100 nm or less. Examples of such fumed silica include those obtained by hydrolyzing silicon tetrachloride in a hydrogen and oxygen flame. Any of the fumed silicas typically used in cosmetics can be used. Furthermore, the fumed silica may be hydrophobized before use. The hydrophobization method is not particularly limited, but examples include silylation, octylsilanization, coating and baking using methylhydrogenpolysiloxane, and metal soap coating. In the present invention, from the viewpoint of the thickness of the coating, hydrophobized fumed silica is preferred, and silylated fumed silica is more preferred. Fumed silica may be used alone or in combination of two or more types (e.g., with or without hydrophobization, or with different hydrophobization treatments).

[0033] Specific examples of silylated fumed silica include dimethylsilylated silica and / or trimethylsilylated silica. Dimethylsilylated silica and trimethylsilylated silica are silica whose surfaces have been dimethylsilylated and trimethylsilylated, respectively. The dimethylsilylation treatment and trimethylsilylation treatment are not particularly limited, and can be carried out by a conventional surface treatment method using a silicone compound such as a reactive organosilane or organosilazane. Specific examples of the silicone compound used include dimethyldichlorosilane for the dimethylsilylation treatment and trimethylchlorosilane or hexamethyldisilazane for the trimethylsilylation treatment.

[0034] Component (B) may be a commercially available product, and examples of commercially available products include AEROSIL (registered trademark) 90, AEROSIL 130, AEROSIL 200, AEROSIL 200F, AEROSIL 300, AEROSIL 380, AEROSIL R972, AEROSIL R974, AEROSIL R976, AEROSIL R976S, AEROSIL RX200, AEROSIL R202, AEROSIL R805, AEROSIL R812, and AEROSIL RA200H (all manufactured by Nippon Aerosil Co., Ltd.), Taranox 500 (manufactured by Talco), and Cabosil TS-530 (manufactured by Cabot Corporation).

[0035] From the viewpoint of the effects of the present invention, the content of component (B) in the cosmetic is preferably 0.01% by mass or more, 0.05% by mass or more, 0.1% by mass or more, 0.5% by mass or more, or 1% by mass or more. Furthermore, from the viewpoint of the thickness of the finish, the content of component (B) in the cosmetic is preferably 20% by mass or less, 15% by mass or less, 10% by mass or less, 8% by mass or less, 6% by mass or less, or 5% by mass or less. The content of component (B) in the cosmetic is preferably 0.01 to 20% by mass, 0.05 to 15% by mass, 0.1 to 10% by mass, 0.5 to 8% by mass, or 1 to 6% by mass. When component (B) is hydrophobically treated fumed silica, the content of component (B) refers to the total content of silica treated with the hydrophobizing agent.

[0036] In terms of the effects of the present invention, it is preferable that the mass ratio (B) / (A) of component (B) to component (A) in the cosmetic exceeds 1, is 3 or more, is 5 or more, or is 10 or more. Furthermore, in terms of the thickness of the finish, it is preferable that the mass ratio (B) / (A) of component (B) to component (A) in the cosmetic is 2000 or less, 1500 or less, 1000 or less, 500 or less, or 150 or less. It is preferable that the mass ratio (B) / (A) of component (B) to component (A) in the cosmetic is more than 1 and 2000 or less, more preferably 3 to 1500, even more preferably 5 to 1000, and even more preferably 10 to 500.

[0037] (Component (C): Dextrin fatty acid ester, the fatty acid portion of which is derived from a mixture of branched saturated fatty acids and straight-chain fatty acids) The fatty acids used in the dextrin fatty acid ester are branched saturated fatty acids and straight-chain saturated fatty acids.

[0038] The branched saturated fatty acid is preferably a branched saturated fatty acid having 4 to 26 carbon atoms, such as isobutyric acid, isovaleric acid, 2-ethylbutyric acid, ethylmethylacetic acid, isoheptanoic acid, 2-ethylhexanoic acid, isononanoic acid, isodecanoic acid, isotridecanoic acid, isomyristic acid, isopalmitic acid, isostearic acid, isoarachic acid, and isohexacosanoic acid. One or more branched saturated fatty acids can be appropriately selected or combined for use. Of these, the branched saturated fatty acid is preferably one having 6 to 22 carbon atoms, more preferably isostearic acid and / or 2-ethylhexanoic acid, and particularly preferably 2-ethylhexanoic acid.

[0039] The straight-chain saturated fatty acid is preferably a straight-chain saturated fatty acid having 2 to 22 carbon atoms, such as acetic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachic acid, and behenic acid. One or more straight-chain saturated fatty acids can be appropriately selected or combined for use. Among these, those having 8 to 22 carbon atoms are preferred, with those having 12 to 22 carbon atoms being particularly preferred, and at least one selected from the group consisting of lauric acid, myristic acid, palmitic acid, and stearic acid being preferred, myristic acid and / or palmitic acid being more preferred, with palmitic acid being even more preferred.

[0040] The average glucose polymerization degree of the dextrin is preferably 3 to 150, more preferably 10 to 100. The sugar chain of the dextrin may be either linear or branched.

[0041] Examples of dextrin fatty acid esters in which the fatty acid moiety is derived from a mixed fatty acid of branched saturated fatty acid and straight-chain fatty acid include dextrin (isobutyric acid / caprylic acid) ester, dextrin (2-ethylhexanoic acid / caprylic acid) ester, dextrin (isoarachidic acid / caprylic acid) ester, dextrin (isopalmitic acid / caprylic acid) ester, dextrin (ethylmethylacetic acid / lauric acid) ester, dextrin (2-ethylhexanoic acid / lauric acid) ester, dextrin (isoheptanoic acid / lauric acid / behenic acid) ester, dextrin (isostearic acid / myristic acid) ester, and dextrin (isohexadecanoic acid). Examples of suitable dextrin esters include dextrin 2-ethylhexanoate / palmitate ester, dextrin isostearate / palmitate ester, dextrin isostearate / isovalerate / palmitate ester, dextrin 2-ethylhexanoate / palmitate / stearate ester, dextrin isodecanoate / palmitate ester, dextrin isopalmitate / stearate ester, dextrin isostearate / arachidate ester, dextrin 2-ethylhexanoate / arachidate ester, and dextrin 2-ethylbutyrate / behenate ester. Among these, dextrin 2-ethylhexanoate / palmitate ester is preferred in terms of the effects of the present invention.

[0042] In terms of the effects of the present invention, the content of component (C) in the cosmetic is preferably 0.0001 to 15 mass%, 0.0005 to 10 mass%, 0.001 to 10 mass%, 0.01 to 10 mass%, or 0.1 to 6 mass%.

[0043] (Component (D): Malic acid alkyl ester having one or two hydroxyl groups in the molecule and / or glycerin fatty acid ester having one or two hydroxyl groups in the molecule) The oily liquid cosmetic of the present invention preferably further contains component (D): a malic acid alkyl ester having one or two hydroxyl groups in the molecule and / or a glycerin fatty acid ester having one or two hydroxyl groups in the molecule, as this further improves the application thickness. Component (D) is preferably liquid at 25°C. "Liquid at 25°C" means that the cosmetic has fluidity at 25°C. The molecular weight of component (D) is preferably 300 to 5,000.

[0044] Specific examples of component (D) include alkyl malate esters such as diisostearyl malate, and glycerin fatty acid esters such as glyceryl diisostearate, polyglyceryl-2 diisostearate, diglyceryl triisostearate (polyglyceryl-2 triisostearate), and decaglyceryl decaisostearate (polyglyceryl-10 decaisostearate). Among these, the oily liquid cosmetic preparation of the present invention preferably contains at least one selected from the group consisting of diglyceryl triisostearate (polyglyceryl-2 triisostearate), polyglyceryl-2 diisostearate, and diisostearyl malate. Component (D) may be used alone or in combination of two or more.

[0045] Component (D) may be a commercially available product, and examples of commercially available products include Cosmol 43V, Cosmol 42V, Cosmol 43N, and Cosmol 222 (all manufactured by Nisshin Oillio Group, Ltd.).

[0046] From the viewpoint of the effect of adding component (D), the content of component (D) in the cosmetic is preferably 1 to 100% by mass, more preferably 5 to 80% by mass, and may be 5 to 50% by mass, or 5 to 40% by mass.

[0047] (oil) The oily liquid cosmetic preparation of the present invention generally contains an oily agent. The oily agent may be the above-mentioned component (D) alone, or may contain an oily agent other than component (D).

[0048] Oils other than component (D) include hydrocarbons such as isododecane, isohexadecane, liquid paraffin (mineral oil), squalane, squalene, α-olefin oligomer, polybutene, liquid isoparaffin, light liquid isoparaffin, heavy liquid isoparaffin, polyisobutylene, and hydrogenated polyisobutene, rapeseed oil, avocado oil, almond oil, apricot kernel oil, perilla oil, orange oil, olive oil, kiwi seed oil, grape seed oil, sesame oil, wheat germ oil, rice germ oil, rice bran oil, safflower oil, and saffron oil. Animal and vegetable oils such as peanut oil, soybean oil, tea seed oil, corn oil, rapeseed oil, evening primrose oil, camellia oil, persic oil, Job's tears oil, peanut oil, sunflower oil, sunflower seed oil, grape seed oil, meadowfoam oil, rosemary oil, jojoba oil, jojoba seed oil, macadamia nut oil, lavender oil, rosehip oil, and mink oil; glyceryl tri-2-ethylhexanoate (triethylhexanoin), isotridecyl isononanoate, isononyl isononanoate, cetyl 2-ethylhexanoate, isopropyl myristate, paprika Isopropyl palmitate, isopropyl isostearate, 2-ethylhexyl palmitate, octyldodecyl myristate, glyceryl trioctanoate, caprylic / capric triglyceride, trimethylolpropane triisostearate, propylene glycol dicaprate, neopentyl glycol dicaprate, neopentyl glycol diethylhexanoate, pentaerythrityl tetraethylhexanoate, hexa(hydroxystearic acid), Esters such as dipentaerythrityl phosphate / stearic acid / rosin acid, dialkyl carbonate, tritridecyl trimellitate, bisethoxydiglycol cyclohexane-1,4-dicarboxylate, dimer dilinoleyl hydrogenated rosin condensate, C12-15 alkyl benzoate, cetyl palmitate, diglyceryl tetraisostearate, ethyl oleate, glyceryl triisostearate, ethyl linoleate, and oleyl oleate; fatty acids such as stearic acid, behenic acid, oleic acid, and isostearic acid;Higher alcohols such as oleyl alcohol, 2-octyldodecanol, 2-decyltetradecanol, isostearyl alcohol, 2-hexyldecanol, stearyl alcohol, cetostearyl alcohol, behenyl alcohol, and jojoba alcohol; dimethylpolysiloxane (dimethicone), methylhydrogenpolysiloxane, methyltrimethicone, methylphenylpolysiloxane (diphenylsiloxyphenyltrimethicone), cyclopentasiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, tetramethyltetrahydrogencyclotetrasiloxane, tetramethyltetraphenylcyclotetrasiloxane, tetramethyltetratrifluoropropylcyclotetrasiloxane, pentamethylpentatrifluoropropylcyclopentasiloxane, and polyether-modified dimethylpolysiloxane. Silicone oils such as hexane, oleyl-modified dimethylpolysiloxane, polyvinylpyrrolidone-modified dimethylpolysiloxane, and alkyl-modified dimethylpolysiloxane; fluorine-based oils such as perfluoropolyether, perfluorodecane, and perfluorooctane; lanolin derivatives such as lanolin acetate, lanolin fatty acid isopropyl, and lanolin alcohol; ultraviolet absorbers such as 2-ethylhexyl paramethoxycinnamate, ethylhexyl salicylate, 2-[4-(diethylamino)-2-hydroxybenzoyl]benzoic acid hexyl ester, methylenebisbenzotriazolyltetramethylbutylphenol, bisethylhexyloxyphenol methoxyphenyl triazine, polysilicone-15, and 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine (ethylhexyl triazone);Cocoa butter, shea butter, castor oil, hydrogenated castor oil, hydrogenated coconut oil, petrolatum, hydrogenated castor oil monostearate, hydrogenated castor oil monohydroxystearate, cholesteryl hydroxystearate, dipentaerythritol fatty acid ester, N-lauroyl-L-glutamic acid di(phytosteryl 2-octyldodecyl), N-lauroyl-L-glutamic acid di(octyldodecyl / cholesteryl / behenyl), N-lauroyl-L-glutamic acid di(octyldodecyl / phytosteryl / behenyl), macadamia Examples of suitable oils include paste-like oils such as phytosteryl annatto oil fatty acid and dimer dilinoleate (phytosteryl / isostearyl / cetyl / stearyl / behenyl); waxes such as paraffin wax, ceresin wax, microcrystalline wax, polyethylene wax, Fischer-Tropsch wax, beeswax, and candelilla wax; polyethylene glycol distearate, glyceryl tribehenate, cholesterol, phytosterol, stearyl-modified polysiloxane, hydrogenated oil, and palm oil. These oils may be used alone or in combination of two or more.

[0049] In one preferred embodiment, the oil contains an oil having an ester skeleton, in terms of smoothness of spreadability.

[0050] The oil preferably contains at least a liquid oil (an oil that is liquid at 25°C). The content of the liquid oil (preferably an oil having an ester skeleton) in the oil-based liquid cosmetic is preferably 40% by mass or more, more preferably 50% by mass or more, and may be 60% by mass or more, 70% by mass or more, or 80% by mass or more. The content of the liquid oil in the oil-based liquid cosmetic may be 98% by mass or less. Furthermore, the oil may consist solely of liquid oil. Note that the liquid oil referred to here also includes component (D) when component (D) is a liquid oil.

[0051] (oil-based liquid cosmetics) In addition to the essential ingredients described above, other additives may be added to the oily liquid cosmetic of the present invention, such as surfactants, thickeners, gelling agents, preservatives, chelating agents, cosmetic ingredients, lower alcohols, antioxidants, etc., as appropriate, within the scope that does not impair the effects of the present invention.

[0052] The oily liquid cosmetic of the present invention generally contains substantially no water. Specifically, for example, the water content in the cosmetic may be 1% by mass or less (lower limit: 0% by mass), 0.5% by mass or less, 0.3% by mass or less, 0.1% by mass or less, or 0% by mass.

[0053] The oily liquid cosmetic preparation of the present invention is liquid at 25°C from the viewpoint of the effects of the present invention, particularly from the viewpoint of usability. Here, being liquid at 25°C means that the cosmetic preparation is in a state of having fluidity at 25°C. Furthermore, the viscosity of the oily liquid cosmetic preparation of the present invention at 20°C is preferably 100 to 50,000 mPa·s, and more preferably 100 to 40,000 mPa·s. The viscosity is a value measured by the measurement method described in the examples.

[0054] The oily liquid cosmetic of the present invention is preferably used as a skin care cosmetic such as a beauty serum or cleanser, or as a hair cosmetic such as a hair oil. [Example]

[0055] The effects of the present invention will be explained using the following examples and comparative examples. In the examples, the terms "parts" and "%" may be used, but unless otherwise specified, they represent "parts by mass" or "% by mass." Furthermore, unless otherwise specified, each operation is carried out at room temperature (25°C). In the following examples, the "remaining amount" in the content (% by mass) means the amount that makes the total amount 100% by mass.

[0056] Examples 1 to 10 and Comparative Examples 1 to 5: Oil beauty serums (oily liquids) were prepared according to the formulations shown in Tables 1 and 2 below.

[0057] (Manufacturing method) A: The ingredients were mixed at room temperature. B: A was heated to 100°C and mixed until uniformly dissolved. C: Cooled to 30°C to obtain an oily beauty serum (oily liquid).

[0058] (Viscosity measurement method) Equipment used: B-type viscometer (VISCOMETER TVB-10 manufactured by Toki Sangyo) Measurement temperature: 20℃ Measurement conditions: Rotor numbers 2 to 4 Rotation speed: 0.3 to 6.0 rpm Measurement time: 1 to 3 minutes The obtained oily beauty serum (oily liquid) was stored at 20°C and the measurement value was read the day after preparation.

[0059] Evaluation method 1: Stability over time Twenty samples of each test material were left standing at 25°C for one month, and then evaluated for sweating and oil separation according to the following evaluation criteria. <Evaluation criteria> (Score): (Evaluation result) 2: No change in state occurred, either due to sweating or oil separation. 1: A slight change in either sweating or oil separation has occurred, but it is not a problem in terms of product quality when used. 0: Either sweating or oil separation is noticeable, which is undesirable from the perspective of product quality. <Judgment criteria> (Judgment): (Average score) ◎: 1.5 points or more ○: 1 point or more and less than 1.5 points ×: Less than 1 point.

[0060] Evaluation method 2: Thickness of the starting point Each sample was tested by a panel of 20 cosmetic experts, who each rated it on a four-point scale using the absolute evaluation below. The average score was calculated from the total scores of all panelists, and the results were judged according to the following criteria. Specifically, each sample was placed on the skin and pressed with the hand to evaluate its thickness (elasticity). <Evaluation criteria> (Score): (Evaluation result) 3: I really feel the thickness of the work. 2: I feel the depth of the work. 1: I feel a slight thickness at the start. 0: No feeling of thickness at the beginning. <Judgment criteria> (Judgment): (Average score) ◎: 2.5 points or more ○: 2 points or more and less than 2.5 points △: 1 point or more but less than 2 points ×: Less than 1 point.

[0061] Evaluation method 3: Smoothness of spread Each sample was tested by a panel of 20 cosmetic experts, who each rated it on a four-point scale using the absolute evaluation below. The average score was calculated from the total scores of all panelists, and the results were judged according to the following criteria. Specifically, each sample was applied to the skin, and the ease of spreading when blended into the skin was visually confirmed. <Evaluation criteria> (Score): (Evaluation result) 3: Feels very smooth and spreadable 2: Feel the smoothness of the spread 1: I feel a slight smoothness in the spread 0: No smoothness in spreading <Judgment criteria> (Judgment): (Average score) ◎: 2.5 points or more ○: 2 points or more and less than 2.5 points △: 1 point or more but less than 2 points ×: Less than 1 point.

[0062] Evaluation method 4: Penetration Each sample was subjected to a use test by a panel of 20 cosmetic experts, who each rated it on a four-point scale using the absolute evaluation below. The average score was calculated from the total scores of all panelists, and the results were judged according to the following criteria. Specifically, the cosmetic was applied to the skin, and the feeling of penetration into the skin after blending was visually confirmed. <Evaluation criteria> (Score): (Evaluation result) 3: I feel a strong sense of penetration. 2: Feel the penetration 1: I feel some penetration 0: No penetration <Judgment criteria> (Judgment): (Average score) ◎: 2.5 points or more ○: 2 points or more and less than 2.5 points △: 1 point or more but less than 2 points ×: Less than 1 point.

[0063] The results of each evaluation method are shown in Tables 1 and 2.

[0064] [Table 1]

[0065] [Table 2]

[0066] (*1) OILKEMIA 5S CC Polymer (manufactured by Lubrizol Corporation, solid content 30%, soluble in 100 parts by mass of cetyl 2-ethylhexanoate at 100°C) (*1') OILKEMIA 5S Polymer (manufactured by Lubrizol Corporation, solid content 30%, soluble in 100 parts by weight or more of cetyl 2-ethylhexanoate at 100°C) (*2) AEROSIL R976S (manufactured by Nippon Aerosil Co., Ltd.) (*3) Leopard TT2 (manufactured by Chiba Flour Mills) (*4) Leopard ISK2 (manufactured by Chiba Flour Mills) (*5) Leopard TL2 (manufactured by Chiba Flour Mills) (*6) Cosmol 43V (manufactured by Nisshin Oillio Group) From the above results, the oily liquid oil beauty serums of Examples 1 to 10 were excellent in stability over time and in initial thickness, smoothness of spread, and penetration feel. On the other hand, Comparative Example 1, which did not contain component (C), showed a significant decrease in initial thickness. Comparative Example 2, which did not contain component (A), showed a significant decrease in stability over time, as well as a significant decrease in smoothness of spread and penetration feel. Comparative Example 3, which did not contain component (B), showed a significant decrease in all items. Comparative Examples 4 and 5, which contained inulin stearate or dextrin palmitate instead of component (C), showed a significant decrease in stability over time and were unsatisfactory in terms of smoothness of spread and penetration feel.

[0067] (Example 11: Oil beauty serum) (mass %) (1) Remaining amount of caprylic / capric triglyceride (2) Methylphenylpolysiloxane 3 (3) Polyglyceryl-2 diisostearate (ingredient D) (※7) 15 (4) Light liquid isoparaffin 1 (5) Dimethicone (dynamic viscosity 6mm) 2 / s(25℃)) 1 (6) Ethyl oleate 0.5 (7) Dibutylhydroxytoluene 0.03 (8) Jojoba oil 7 (9) Caprylic / capric triglyceride dispersion of oil-soluble polyurethane (component A) (*1) 0.5 (10) Dextrin Palmitate / 2-Ethylhexanoate (Component C) (*3) 3 (11) Silica anhydride (ingredient B) (※8) 2 (12) Caryodendron orinocense seed oil, linseed oil, argania spinosa kernel oil, gardenia taitensis flower extract, sesame seed oil, kukui nut oil, salvia hispanica seed oil, almond oil, coconut oil mixture 0.2 (※7) Cosmol 42V (manufactured by Nisshin Oillio Group) (※8) AEROSIL 380 (Japan Aerosil Co., Ltd.) (hydrophilic silica) (Manufacturing method) A: The ingredients were mixed at room temperature. B: A was heated to 100°C and mixed until uniformly dissolved. C: Cooled to 30°C to obtain an oily beauty serum.

[0068] The oily liquid oil beauty serum of Example 11 had excellent stability over time, and was excellent in initial thickness, smooth spreadability, and penetration. The viscosity of the oily liquid oil beauty serum of Example 11 at 20°C was 2000 (mP·s).

[0069] (Example 12: Hair oil) (mass %) (1) Hydrogenated polyisobutene remaining amount (2) Dimethicone (dynamic viscosity 6mm) 2 / s(25℃)) 5 (3) Isopropyl myristate 15 (4) Cetyl ethylhexanoate 15 (5)Fragrance 5 (7) Almond oil 5 (8) Dibutylhydroxytoluene 0.03 (9) Polyglyceryl-2 triisostearate (ingredient D) (*6) 15 (10) Dispersion of tri(caprylic / capric acid) glyceryl in oil-soluble polyurethane (component A) (*1) 0.1 (11) Dextrin Palmitate / 2-Ethylhexanoate (Component C) (*3) 1 (12) Silylated anhydrous silica (ingredient B) (*2) 3 (13) Mixture of sage oil, grape seed oil, rapeseed oil, corn oil, soybean oil, sesame seed oil, and kukui nut oil 0.2 (Manufacturing method) A: The ingredients were mixed at room temperature. B: A was heated to 100°C and mixed until uniformly dissolved. C: Cooled to 30°C to obtain hair oil.

[0070] The oily liquid hair oil of Example 12 had excellent stability over time, thickness at first application, smooth spreadability, and penetration. The viscosity of the oily liquid hair oil of Example 12 at 20°C was 1000 (mP·s).

[0071] (Example 13: Cleansing Oil) (mass %) (1) Liquid paraffin 30 (2) Remaining amount of caprylic / capric triglyceride (3) Diisostearyl malate (ingredient D) 15 (4) Polyglyceryl-2 triisostearate (ingredient D) (*6) 15 (5) Cetyl 2-ethylhexanoate 15 (6) Phenoxyethanol 0.5 (7) Sorbitan sesquioleate 0.2 (8) Polyoxyethylene coconut oil fatty acid monoethanolamide 0.1 (9) Polyoxyethylene sorbitan tetraoleate 10 (10) Dispersion of tri(caprylic / capric acid) glyceryl in oil-soluble polyurethane (component A) (*1) 0.01 (11) Dextrin Palmitate / 2-Ethylhexanoate (Component C) (*3) 4 (12) Silylated anhydrous silica (ingredient B) (*2) 3 (13) Caryodendron orinocense seed oil, linseed oil, argania spinosa kernel oil, gardenia taitensis flower extract, sesame seed oil, kukui nut oil, salvia hispanica seed oil, almond oil, coconut oil, rosehip oil, lavender oil mixture 0.2 (Manufacturing method) A: The ingredients were mixed at room temperature. B: A was heated to 100°C and mixed until uniformly dissolved. C: Cooled to 30°C to obtain cleansing oil.

[0072] The oil-based liquid cleansing oil of Example 13 had excellent stability over time, and was excellent in initial thickness, smooth spreadability, and penetration. The viscosity of the oil-based liquid cleansing oil of Example 13 at 20°C was 4500 (mP·s).

Claims

1. The following components (A) to (C) (A): Oil-soluble polyurethane (B): Fumed silica (C): Dextrin fatty acid ester in which the fatty acid moiety is derived from a mixed fatty acid of branched saturated fatty acid and linear saturated fatty acid An oily liquid cosmetic comprising:

2. 3. The oily liquid cosmetic preparation according to claim 1, further comprising component (D): a malic acid alkyl ester having one or two hydroxyl groups in the molecule and / or a glycerin fatty acid ester having one or two hydroxyl groups in the molecule.

3. 3. The oil-based liquid cosmetic according to claim 1, wherein the content of the component (A) in the oil-based liquid cosmetic is 0.0005 to 3% by mass.

4. 3. The oily liquid cosmetic preparation according to claim 1, which has a viscosity at 20°C of 100 to 50,000 mPa·s.

5. 3. The oily liquid cosmetic according to claim 1, wherein the component (C) is dextrin palmitate / ethylhexanoate.

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