Oil particles and external composition

Abstract

Provided is an oily particle having an average particle diameter of 0.05-10mm, wherein the oily particle contains: (A) a polar oil; and (B) an oily gelling agent having a melting point of at least 60℃.

Description

Technical Field

[0001] The present invention relates to oily particles and external compositions.

Background Art

[0002] For cosmetics such as creams, lotions, liquid foundations, and hair conditioners, it is required to blend water-soluble components and oils simultaneously, such as water and moisturizers. A state in which one of two immiscible liquids, such as oil and water, becomes fine particles and is dispersed in the other is called emulsification. Conventionally, a technique has been developed to make the emulsified particles as small as possible (1 to 50 μm) because if the dispersed emulsified particles are large, the water and oil are likely to separate.

[0003] By the way, if such particles are large, there are many advantages such as an expanded range of substances that can be encapsulated in the particles and their content, and an improved feeling of use during application. However, if the emulsified particles are enlarged, separation, aggregation, coalescence, etc. occur and the stability as emulsified particles cannot be obtained. Therefore, a lipid shell, which has a structure completely different from that of emulsified particles produced using surfactants, that is, an oily particle larger (10 mm) than conventional emulsified particles, with the outside of the particle covered with a solid oil shell, has been developed (Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, conventional lipid shells could not incorporate a large amount of polar oil, which is a highly polar oil component. Therefore, an aspect of the present invention aims to provide oily particles capable of incorporating a large amount of polar oil.

Means for Solving the Problems

[0006] As a result of intensive research to solve the above problems, the inventors of the present invention have completed oily particles, which are an aspect of the present invention, having an average particle size of 0.05 to 10 mm and containing (A) a polar oil and (B) an oily gelling agent having a melting point of 60°C or higher.

Effects of the Invention

[0007] According to an aspect of the present invention, it is possible to provide oily particles capable of incorporating a large amount of polar oil.

Modes for Carrying Out the Invention

[0008] An aspect of the present invention relates to oily particles having an average particle size of 0.05 to 10 mm and containing (A) a polar oil and (B) an oily gelling agent having a melting point of 60°C or higher. Such oily particles can enhance the stability of the lipid shell even when a certain amount of polar oil is incorporated at a high content. The following will explain an aspect of the present invention in detail, but the embodiments of the present invention are not limited thereto.

[0009] <Oily Particles> The oily particles, which are an aspect of the present invention, have an average particle size of 0.05 to 10 mm, and a shell (coating) of solid oil content coats the liquid oil content. The solid oil content mainly exists at the interface between the oil phase and the water phase, but may partially exist inside the oily particles together with other oily components. Also, the liquid oil content may partially exist at the interface between the oil phase and the water phase. With such a configuration, when applied to the skin as an external preparation, the inhibition of water penetration into the skin by the oil phase components is suppressed, and due to the presence of the water-soluble thickener in the water phase, the oil phase can be stably dispersed in the water phase without adding a surfactant.

[0010] <(A) Polar oil> (A) The polar oil is not particularly limited as long as it is usually used in cosmetics, pharmaceuticals, and foods. As an index indicating the degree of polarity of an organic compound, the IOB value (Inorganic / Organic Balance (inorganic value / organic value)), which represents the ratio of the inorganic value to the organic value, is used. Regarding the "inorganic value" and "organic value" in the IOB value, for example, for each carbon atom in the molecule, the "organic value" is 20, and for each hydroxyl group, the "inorganic value" is 100. The "inorganic value" and "organic value" corresponding to various atoms or functional groups are set. By integrating the above values of all atoms and functional groups in the organic compound, the IOB value of the desired organic compound can be calculated (see, for example, Fujita, "Chemical Field", Vol. 11, No. 10, pp. 719-725, 1957). The IOB value of the polar oil, which is one aspect of the present invention, is not particularly limited, but is preferably 0.05 to 0.80.

[0011] Such polar oils include oils having an ester group and a polyoxyalkylene group continuously, such as esters like cetyl octanoate, oils having a polyoxyalkylene group, and vegetable oils.

[0012] Among them, the (A) polar oil, which is one aspect of the present invention, may contain a polar oil having an ultraviolet absorption function (hereinafter, may also be referred to as an ultraviolet absorption polar oil). The ultraviolet absorption polar oil contained in the (A) polar oil is not particularly limited, but examples include benzoic acid derivatives, salicylic acid derivatives, cinnamic acid derivatives, dibenzoylmethane derivatives, β,β-diphenylacrylate derivatives, benzophenone derivatives, benzylidene camphor derivatives, phenylbenzimidazole derivatives, triazine derivatives, phenylbenzotriazole derivatives, anthranil derivatives, imidazoline derivatives, benzalmalonate derivatives, 4,4-diarylbutadiene derivatives, etc. Specifically, it is as follows.

[0013] Examples of benzoic acid derivatives include ethyl p-aminobenzoate (PABA), ethyl-dihydroxypropyl PABA, ethylhexyl-dimethyl PABA, glyceryl PABA, PEG-25-PABA, hexyl diethylaminohydroxybenzoyl benzoate, and the like.

[0014] Examples of salicylic acid derivatives include homosalate, ethylhexyl salicylate (octyl salicylate), dipropylene glycol salicylate, TEA salicylate, and the like.

[0015] Examples of cinnamic acid derivatives include octyl methoxycinnamate or ethylhexyl methoxycinnamate, isopropyl methoxycinnamate, isoamyl methoxycinnamate, cinoxate, DEA methoxycinnamate, diisopropyl methylcinnamate, glyceryl-ethylhexanoate-dimethoxycinnamate, di-(2-ethylhexyl)-4'-methoxybenzalmalonate, and the like.

[0016] Examples of dibenzoylmethane derivatives include butyl methoxydibenzoylmethane (4-tert-butyl-4'-methoxydibenzoylmethane), and the like.

[0017] Examples of β,β-diphenylacrylate derivatives include octocrylene, and the like.

[0018] Examples of benzophenone derivatives include benzophenone-1, benzophenone-2, benzophenone-3 or oxybenzone, benzophenone-4, benzophenone-5, benzophenone-6, benzophenone-8, benzophenone-9, benzophenone-12, and the like.

[0019] Examples of triazine derivatives include anisotriazine (bisethylhexyloxyphenol methoxyphenyltriazine), ethylhexyl triazone, diethylhexyl butamido triazone, 2,4,6-tris(diisobutyl-4'-aminobenzalmalonate)-s-triazine, and the like.

[0020] Examples of the phenylbenzotriazole derivative include droxmetrizole trisiloxane, methylenebis(benzotriazolyltetramethylbutylphenol), and the like.

[0021] Examples of the anthranil derivative include menthyl anthranilate, and the like.

[0022] Examples of the imidazoline derivative include ethylhexyl dimethoxybenzylidene dioxoimidazolidine propionate, and the like.

[0023] Examples of the benzalmalonate derivative include polyorganosiloxane having a benzalmalonate functional group, and the like.

[0024] Examples of the 4,4-diarylbutadiene derivative include 1,1-dicarboxy(2,2'-dimethylpropyl)-4,4-diphenylbutadiene, and the like.

[0025] In one aspect of the present invention, the (A) polar oil may contain the above ultraviolet-absorbing polar oils alone or in combination of two or more. For example, as the ultraviolet-absorbing polar oils, ethylhexyl methoxycinnamate, bis-ethylhexyloxyphenol methoxyphenyltriazine, oxybenzone-3, hexyl diethylaminohydroxybenzoyl benzoate, homosalate, ethylhexyl salicylate (octyl salicylate), butyl methoxydibenzoylmethane, octocrylene, anisotriazine (bis-ethylhexyloxyphenol methoxyphenyltriazine), and ethylhexyl triazone can be combined and used. Thus, it is preferable to use a combination of a plurality of ultraviolet-absorbing polar oils having different base compounds of the above derivatives because a wide range of ultraviolet protection effects can be obtained. In particular, it is preferable to use ethylhexyl methoxycinnamate, bis-ethylhexyloxyphenol methoxyphenyltriazine, and hexyl diethylaminohydroxybenzoyl benzoate alone or in combination of two or more.

[0026] (A) The oily particles in which the polar oil contains an ultraviolet-absorbing polar oil, which is one aspect of the present invention, are preferable in that they are used in cosmetics and quasi-drugs having a sunscreen effect.

[0027] As described above, the case where (A) the polar oil contains an ultraviolet-absorbing polar oil may be a case where only the ultraviolet-absorbing polar oil is blended, or a case where the ultraviolet-absorbing polar oil is combined and blended with a polar oil having no ultraviolet-absorbing function. Examples of the polar oil having no ultraviolet-absorbing function include ester oil and polyalkylene oxide derivative oil. Specifically, it is as follows.

[0028] Examples of ester oils include isononyl isononanoate, isopropyl myristate, cetyl 2-ethylhexanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearate, ethylene glycol di(2-ethylhexanoate), dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, glyceryl di(2-heptylundecanoate), trimethylolpropane tri(2-ethylhexanoate), trimethylolpropane triisostearate, pentaerythritol tetra(2-ethylhexanoate), glyceryl tri(2-ethylhexanoate) (triethylhexanoin), trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, diethylhexyl naphthalenedicarboxylate, C12-15 alkyl benzoate, cetearyl isononanoate, tri(caprylic acid / capric acid) glycerin, (dicaprylic acid / capric acid) butylene glycol, glyceryl trimyristate, glyceryl tri(2-heptylundecanoate), methyl ester of castor oil fatty acid, oleyl oleate, cetostearyl alcohol acetoglyceride, 2-heptylundecyl palmitate, diisobutyl adipate, 2-octyldodecyl N-lauroyl-L-glutamate, di(2-heptylundecyl) adipate, ethyl laurate, di(2-ethylhexyl) sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, di(2-ethylhexyl) succinate, ethyl acetate, butyl acetate, amyl acetate, triethyl citrate, tripropylene glycol dipivalate, etc. In particular, it is preferable to use diisopropyl sebacate.

[0029] Examples of the polyalkylene oxide derivative oil include diethylene glycol monopropyl ether, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxypropylene butyl ether, and the like.

[0030] The above ester oil and polyalkylene oxide derivative oil may be blended alone or in combination of two or more as the (A) polar oil, which is one aspect of the present invention. When the polar oil containing the ester oil is used in combination with the ultraviolet-absorbing polar oil, the dissolution of the solid ultraviolet-absorbing polar oil is promoted. For example, it is preferable to blend ethylhexyl methoxycinnamate, bis(ethylhexyl)oxyphenol methoxyphenyltriazine, and hexyl diethylaminohydroxybenzoyl benzoate alone or in combination of two or more in combination with diisopropyl sebacate.

[0031] If a large amount of polar oil can be blended in the lipid shell particles, the feel of use is improved, and if a large amount of ultraviolet-absorbing polar oil can be blended, the function as a cosmetic is enhanced. Furthermore, if a product containing a lipid shell that is comfortable to wear and has a good feel as described above can be applied to a sunscreen, the usability of the product is also enhanced, which is preferable.

[0032] As described above, the oily particles, which are one aspect of the present invention, ensure stability even when a large amount of polar oil such as ultraviolet-absorbing polar oil is blended.

[0033] (A) The ratio of the polar oil is 10 to 90% by mass or more, preferably 20 to 80% by mass or more, and more preferably 30 to 70% by mass or more in the total mass of the oily particles of one aspect of the present invention.

[0034] <(B) Oily gelling agent> (B) The oil-based gelling agent forms oil-based particles and enhances stability. Therefore, any substance that can enhance the stability of a lipid shell with a large amount of oil content can be used as the oil-based gelling agent in one aspect of the present invention. Examples of such oil-based gelling agents include, but are not limited to, amino acid derivatives, metal soaps, lipophilic bentonite, dextrin fatty acid esters, sucrose fatty acid esters, benzylidene derivatives of sorbitol, and the like.

[0035] Specifically, examples of amino acid derivatives include acyl amino acid alkylamides, N-lauroyl-L-glutamic acid, α,γ-di-n-butylamine, and the like.

[0036] Examples of metal soaps include aluminum stearate, magnesium stearate, zinc myristate, etc., which have remaining hydroxyl groups.

[0037] Examples of lipophilic bentonite include dimethylbenzyl dodecylammonium montmorillonite clay, dimethyldioctadecylammonium montmorillonite clay, and the like.

[0038] Examples of dextrin fatty acid esters include dextrin palmitate, dextrin oleate, dextrin stearate, and the like.

[0039] Examples of sucrose fatty acid esters include those in which 3 or less of the 8 hydroxyl groups are esterified with higher fatty acids, and the higher fatty acids are stearic acid and palmitic acid.

[0040] Examples of benzylidene derivatives of sorbitol include, for example, monobenzylidene sorbitol, dibenzylidene sorbitol, and the like.

[0041] Preferably, acyl amino acid alkylamides can be mentioned, and specifically, dibutyl lauroyl glutamide and dibutyl ethylhexanoyl glutamide are particularly preferred. In the oil-based particles which are one aspect of the present invention, these components may be blended alone or in combination. By blending the oil-based gelling agent, the oil-based particles are stabilized, and the solidifying power of the solid oil component is reduced, and the hardness can be adjusted so as to be appropriate for crushing and spreading the oil particles on the skin.

[0042] (B) The melting point of the oil-based gelling agent is preferably 60°C or higher. Further, the oil-based gelling agent may be contained in 0.01 to 20% by mass, preferably 0.05 to 15% by mass, and more preferably 0.50 to 10% by mass in the total mass of the oil-based particles which are one aspect of the present invention.

[0043] <(C) Plate-like powder> (C) Examples of the plate-like powder include talc, mica, muscovite, silicone powder, titanium oxide powder, zinc oxide powder, iron oxide powder, magnesium oxide powder, barium sulfate powder, aluminum hydroxide powder, alumina, calcium carbonate powder, calcium phosphate powder, boron nitride powder, pearl agent, cellulose powder, corn starch, nacreous pigment, etc., including silicone resin powder and organic resin powder.

[0044] Specifically, for example, as the organic resin powder, (meth)acrylate resin powder, polyamide resin powder (nylon powder), polyethylene powder, polystyrene powder, copolymer resin powder of styrene and (meth)acrylic acid, benzoguanamine resin powder, polytetrafluoroethylene powder, cellulose powder, and trimethylsilsesquioxane powder, etc. can be mentioned. Examples of commercially available organic resin powder include, for example, Guns Pearl (manufactured by Aika Kogyo Co., Ltd.).

[0045] Examples of the silicone resin powder include (vinyldimethylsilicone / methylsilicone silsesquioxane) copolymer, organopolysiloxane elastomer powder, or composite powder using this as the mother powder. Examples of commercially available spherical silicone resin powder include, for example, Trevyl E-505C, Trevyl E-506C, Trevyl E-506S, Trevyl HP40T (above, Toray Dow Corning Silicone Co., Ltd.), Tospearl 145A (manufactured by Toshiba Silicone Co., Ltd.), Silicone Powder KSP-100, KSP-300 (manufactured by Shin-Etsu Chemical Co., Ltd.), and the like.

[0046] These can be blended alone or in combination of two or more. Among them, talc, mica, and silicone powder are preferred. As the silicone powder, in particular, (vinyldimethylsilicone / methylsilicone silsesquioxane) copolymer is preferred.

[0047] For the plate-like powder of the present invention, it is preferable to use those having an average particle size of 1 to 100 μm by the laser diffraction method and an aspect ratio (a / b) of the long side length (a) to the thickness (b) of 2 to 200.

[0048] The plate-like powder used in the present invention may be subjected to a hydrophobizing surface treatment. The hydrophobizing surface treatment is not particularly limited, and examples include, but are not limited to, silicone treatment, fatty acid treatment, fatty acid soap treatment, fatty acid ester treatment, and the like.

[0049] Specifically, examples of the silicone treatment include treatment with silicone oils such as methylhydrogenpolysiloxane, dimethylpolysiloxane, and methylphenylpolysiloxane; alkylsilanes such as methyltrimethoxysilane, ethyltrimethoxysilane, hexyltrimethoxysilane, and octyltrimethoxysilane; and fluoroalkylsilanes such as trifluoromethylethyltrimethoxysilane and heptadecafluorodecyltrimethoxysilane.

[0050] Examples of fatty acid treatment include treatment with palmitic acid, isostearic acid, stearic acid, lauric acid, myristic acid, behenic acid, oleic acid, rosin acid, 12-hydroxystearic acid, etc.

[0051] Examples of fatty acid soap treatment include treatment with aluminum stearate, calcium stearate, 12-hydroxystearic acid, etc.

[0052] Examples of fatty acid ester treatment include treatment with dextrin fatty acid ester, cholesterol fatty acid ester, sucrose fatty acid ester, starch fatty acid ester, etc. These can be blended alone or in combination of two or more. Among these, treatment with dimethylpolysiloxane or calcium stearate is preferred. These hydrophobization treatments can be carried out according to conventional methods. Among them, in particular, hydrophobized talc, hydrophobized mica, hydrophobized (vinyldimethylsilicone / methylconsilsesquioxane) copolymer, etc. are preferred.

[0053] (C) The content of the plate-like powder may be 0.1 to 5.0% by mass, preferably 0.5 to 2.5% by mass, in the total mass of the oily particles of one embodiment of the present invention. If the content of the (C) plate-like powder is within this range, the desired effect of suppressing aggregation of the oily particles is sufficiently exhibited, and the usability of the oily particles is good.

[0054] Here, when 0.50 to 10% by mass of (B) the oily gelling agent and 0.5 to 2.5% by mass of (C) the plate-like powder are contained in the total mass of the oily particles which is one embodiment of the present invention, the formation and stability of the oily particles are enhanced.

[0055] <(D) Higher alcohol> When a higher alcohol is blended as a solid component in the oil-based particles which are one aspect of the present invention, stable oil-based particles can be provided. Examples of such (D) higher alcohols include higher alcohols having 16 or more carbon atoms such as isostearyl alcohol, lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, batyl alcohol, octyldodecanol and the like. These can be blended alone or in combination of two or more. In particular, it is preferable to use behenyl alcohol and batyl alcohol. When these components are used, the stability of the oil-based particles which are one aspect of the present invention at high temperatures is enhanced, and the versatility is also enhanced.

[0056] The higher alcohol may be contained in an amount of 1 to 80% by mass, preferably 5 to 50% by mass, more preferably 10 to 20% by mass in the total mass of the oil-based particles which are one aspect of the present invention.

[0057] <(E) Surfactant> The oil-based particles which are one aspect of the present invention have a structure different from that of the emulsified particles produced using a surfactant. Therefore, a surfactant is not used in the production of the oil-based particles. However, for example, particles containing emulsified particles inside the lipid shell can also be produced. Therefore, the oil-based particles which are one aspect of the present invention may also contain a surfactant.

[0058] As the surfactant related to one aspect of the present invention, any surfactant can be blended as long as it can form emulsified particles contained in the oil-based particles which are one aspect of the present invention. Examples of such surfactants include silicone-based surfactants, fluorine-based surfactants, polymer surfactants, nonionic surfactants, cationic surfactants, anionic surfactants or amphoteric surfactants and the like.

[0059] For example, silicone surfactants, which are polymers of organosilicon compounds having surfactant activity, have high water repellency and are widely used as film-forming agents in cosmetics such as foundations, sunscreens, makeup bases, and conditioning agents for hair treatments. Examples of silicone surfactants suitable for one embodiment of the present invention include, for example, (PEG-10 / lauryldimethicone) crosspolymer, (PEG-15 / lauryldimethicone) crosspolymer, (dimethicone / (PEG-10 / 15)) crosspolymer, PEG / PPG-20 / 22 butylether dimethicone, PEG-10 dimethicone, PEG-11 methyl ether dimethicone, PEG-3 dimethicone, PEG-9 dimethicone, PEG-9 methyl ether dimethicone, polyglyceryl-3 disiloxane dimethicone, lauryl PEG-9 polydimethylsiloxyethyl dimethicone, lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone, etc., but are not limited thereto.

[0060] The surfactant may be contained in an amount of 0.5% or less in the total amount of the oil particles, which is one embodiment of the present invention.

[0061] <(F)(acrylates / alkyl acrylate (C10-30)) crosspolymer> In the oil particles, which are one embodiment of the present invention, (acrylates / alkyl acrylate (C10-30)) crosspolymer may be blended. (Acrylates / alkyl acrylate (C10-30)) crosspolymer is an alkyl-modified carboxyvinyl polymer of a water-soluble polymer, has surfactant activity, and also has an action of preventing aggregation and coalescence of large particles. Therefore, it is a particularly preferred water-soluble thickener for use in the oil particles, which are one embodiment of the present invention. The oil particles containing (acrylates / alkyl acrylate (C10-30)) crosspolymer can maintain the form of the oil particles, which is one embodiment of the present invention, and can maintain their stability, and are further uniformly dispersed in an aqueous solution.

[0062] Such (acrylates / alkyl acrylates (C10-30)) cross-polymers may be contained in an amount of 0.01 to 10% by mass, preferably 0.04 to 5% by mass, based on the total mass of the oily particles, which is one aspect of the present invention.

[0063] <(Oil other than polar oil)> The oily particles, which are one aspect of the present invention, may contain an oil other than (A) polar oil. Such an oil component is not particularly limited and can be an oily component commonly used in external compositions such as cosmetics and quasi-drugs. The oily components other than polar oil include solid oil components and liquid oil components.

[0064] The solid oil component is an oil component that is solid or semi-solid at normal temperature (25°C). Examples of oils that are solid or semi-solid at normal temperature (25°C) include, in addition to the above (D) higher alcohols, for example, hydrocarbon oils, higher fatty acids, higher alcohols, vegetable oils, animal oils, mineral oils, liquid fats and oils, fragrances, fatty acid monocarboxylic acid lanolin alcohol esters, etc., but are not limited thereto.

[0065] Specifically, examples of hydrocarbon oils include solid paraffin, microcrystalline wax, ceresin, beeswax, carnauba wax, polyethylene wax, silicone wax, petrolatum, etc.

[0066] Examples of higher fatty acids include myristic acid, palmitic acid, stearic acid, behenic acid, 12-hydroxystearic acid, etc.

[0067] Examples of higher alcohols other than (D) higher alcohols include linear alcohols (for example, behenyl alcohol, stearyl alcohol, cetyl alcohol, batyl alcohol, etc.) and branched-chain alcohols (for example, monostearyl glycerin ether (batyl alcohol)-2-decyltetradecynol, lanolin alcohol, cholesterol, phytosterol, hexyl dodecanol, isostearyl alcohol, octyl dodecanol, etc.).

[0068] Examples of vegetable oils include cocoa butter, hydrogenated castor oil, hardened oil, hydrogenated palm oil, palm oil, hardened coconut oil, and the like.

[0069] Examples of animal oils and fats include various hydrogenated animal and vegetable fats and oils, sperm oil, beeswax, and the like.

[0070] Examples of waxes and others include, but are not limited to, carnauba wax, candelilla wax, jojoba wax, lanolin, shellac wax, Japan wax, polyethylene powder, petrolatum, and the like. Among these, solid oil components having a melting point of 45 to 75°C are particularly preferred, and more preferably, solid oil components having a melting point of 50 to 70°C. When the melting point is higher than 45°C, the stability of the composition dispersed in the oil particles is good, and when it is lower than 75°C, the preparation of the external composition using the oil particles becomes easy. Examples of such solid oil components include, but are not limited to, higher alcohols having 16 or more carbon atoms such as cetyl alcohol, stearyl alcohol, and behenyl alcohol, and candelilla wax. Furthermore, linear saturated higher alcohols having 18 or more carbon atoms and no unsaturated bonds are more preferred. These components can be blended alone or in combination of two or more.

[0071] The blending amount of the solid oil component is preferably 10 to 50% by mass, more preferably 10 to 20% by mass, in the oil phase of the oil particles which is one aspect of the present invention. When the blending amount of the solid oil component in the oil phase is 10% by mass or more, the stability of the composition dispersed in the oil particles is good, and when it is lower than 50% by mass, it tends to be easily crushed when applied to the skin and has better skin compatibility.

[0072] The liquid oil component is an oil component that is liquid at normal temperature (25°C). Examples thereof include, but are not limited to, silicone oil, hydrocarbon oil, higher fatty acid, higher alcohol, vegetable oil, animal oil and fat, mineral oil, liquid oil and fat, perfume, and the like.

[0073] Specifically, examples of silicone oils include dimethylpolysiloxanes such as dimethicone, phenyl dimethicone, decamethyltetrasiloxane, dodecamethylpentasiloxane, tetradecamethylhexasiloxane, and hexadecamethylheptasiloxane; cyclic polysiloxanes (cyclic dimethylpolysiloxanes) such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, and tetradecamethylcycloheptasiloxane; methylphenylpolysiloxane, methylhydrogenpolysiloxane, decamethylpolysiloxane, dodecamethylpolysiloxane, tetramethyltetrahydrogenpolysiloxane, highly polymerized methylpolysiloxane, amino acid-modified silicone, and caprylyl methyl silicone, but are not limited thereto.

[0074] Silicone oil is used as the main component of the oil phase of oil particles. For example, it is recognized as a necessary component to improve the usability of products containing oil particles, such as that a refreshing feeling cannot be obtained unless a certain amount of silicone oil is blended. However, even if the blending amount of polar oil is increased, it is preferable to have oil particles that can provide such a usability. Among them, it is preferable not to blend cyclic silicone oil, which is a cyclic oil component of polymers of siloxanes in which methyl groups or the like are bonded to silicon atoms of silicon-oxygen bonds. The oil particles according to one aspect of the present invention can provide oil particles with high stability and excellent usability even without blending cyclic silicone.

[0075] Examples of cyclic silicone oils include dimethylpolysiloxanes such as decamethyltetrasiloxane, dodecamethylpentasiloxane, tetradecamethylhexasiloxane, and hexadecamethylheptasiloxane; cyclic polysiloxanes (cyclic dimethylpolysiloxanes) such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, and tetradecamethylcycloheptasiloxane, but are not limited thereto.

[0076] Examples of hydrocarbon oils include isododecane, isohexadecane, isoparaffin, liquid paraffin, ozokerite, squalane, vegetable squalane, jojoba alcohol, pristane, α-olefin oligomer, polybutene, hydrogenated isopolybutene, and the like.

[0077] Examples of higher fatty acids include glyceryl trioctanoate, glyceryl triisopalmitate, triglycerin, oleic acid, tall oil fatty acid, isostearic acid, and the like.

[0078] Examples of higher alcohols include linear alcohols (e.g., lauryl alcohol, isostearyl alcohol, oleyl alcohol, etc.) and branched-chain alcohols (e.g., octyldodecanol, etc.).

[0079] Examples of vegetable oils include avocado oil, camellia oil, macadamia nut oil, evening primrose oil, corn oil, olive oil, rapeseed oil, sesame oil, persic oil, wheat germ oil, southernwood oil, castor oil, linseed oil, safflower oil, cottonseed oil, eno oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, sinagiri oil, Japanese cedar oil, jojoba oil, sunflower oil, almond oil, meduform oil, and germ oil, and the like.

[0080] Examples of animal oils and fats include squalane, turtle oil, mink oil, and egg yolk oil, and the like.

[0081] Examples of other liquid oils include isocetyl isostearate, ethylene glycol di-2-ethylhexanoate, cetyl 2-ethylhexanoate, trimethylolpropane tri-2-ethylhexanoate, pentaerythritol tetra-2-ethylhexanoate, cetyl octanoate, pentaerythrityl tetraoctanoate, glyceryl tri-2-heptylundecanoate, diisobutyl adipate, 2-hexyldecyl sebacate, glyceryl trioctanoate, glyceryl triisopalmitate, diisostearyl malate, isopropyl myristate, 2-octyldodecyl oleate, hexyl decyl dimethyl octanoate, 2-hexyldecyl myristate, myristyl myristate, octyldodecyl myristate, isopropyl palmitate, 2-ethylhexyl palmitate, 2-hexyldecyl palmitate, 2-heptylundecyl palmitate, butyl stearate, isocetyl stearate, decyl oleate, dodecyl oleate, oleyl oleate, myristyl lactate, cetyl lactate, cholesteryl 12-hydroxystearate, methyl ester of castor oil fatty acid, 2-ethylhexyl succinate, 2-hexyldecyl adipate, di-2-heptylundecyl adipate, diisopropyl sebacate, di-2-ethylhexyl sebacate, neopentyl glycol dicaprate, neopentyl glycol dioctanoate, glyceryl tri-2-ethylhexanoate, glyceryl trimyristate, glyceryl tri-2-heptylundecanoate, trimethylolpropane triisostearate, glyceryl tri-2-ethylhexanoate, isopropyl myristate, isopropyl palmitate, hexyl laurate, oleyl oleate, decyl oleate, octyldodecyl myristate, hexyl decyl dimethyl octanoate, diethyl phthalate, dibutyl phthalate, dioctyl succinate, fluorine-modified oil, trioctanoin, tripropylene glycol dipivalate, etc., but are not limited thereto. These components can be formulated alone or in combination of two or more as the oil according to one embodiment of the present invention.

[0082] When the oil content is 1 to 90% by mass, preferably 10 to 85% by mass, and more preferably 15 to 80% by mass in the total mass of the oily particles which is one aspect of the present invention. Also, among the oil phase of the oily particles, it may be 50 to 90% by mass, preferably 80 to 90% by mass. If it is 50% by mass or more, the skin feel is good when applied to the skin, and when it is 90% by mass or less, the stability of the dispersion composition in the oily particles is good. Further, as other components, an ultraviolet absorber which is not a polar oil may be contained.

[0083] The blending amount of the oil other than (A) polar oil containing these solid oil components and liquid oil components varies depending on the use, desired feeling of use, etc., and is not particularly limited, but is preferably 1 to 20% by mass, more preferably 3 to 10% by mass, based on the total mass of the oily particles which is one aspect of the present invention. If the blending amount of the oil phase is 1% by mass or more, a sufficient moist feeling can be brought about when applied to the skin as an external preparation, and if it is 20% by mass or less, the feeling of use is good.

[0084] <Method for producing oily particles> The oily particles which is one aspect of the present invention can be produced by a known method. For example, an oil phase containing a solid oil component and a liquid oil component is added to an aqueous phase at a temperature higher than the melting point of the solid oil component and higher than the melting point of the solid oil component containing a water-soluble thickener, and the mixture is shear-mixed to a temperature below the melting point of the solid oil component, whereby it can be produced.

[0085] Usually, a mixture of oily components heated to a temperature around 70°C to make it liquid is introduced into the aqueous phase by directly injecting it from the lower part of the aqueous phase using injection means such as a liquid delivery pump into the aqueous phase at the same temperature.

[0086] Next, by shear mixing to a temperature below the melting point of the solid oil component, for example, around 40°C to 50°C, the solid oil component is crystallized and the oil particles formed to include other oily components are pulverized by the shear force to form a fine dispersion of the oil. Thereby, without causing floating matter or aggregates of the oily component, preferably as fine particles with an average maximum dimension of 0.1 to 30 μm, more preferably 1 to 15 μm, the oil phase containing the solid oil component can be stably dispersed in the aqueous phase. Incidentally, the shear mixing may be carried out while adding the oil phase into the aqueous phase, or the shear mixing may not be carried out during the addition and may be started immediately after the addition is completed. Also, during the shear mixing, for example, the mixture may be cooled using ice or the like while performing the shear mixing, or the shear mixing may be carried out while allowing natural cooling at room temperature. In this specification, "shear mixing to a temperature below the melting point of the solid oil component" means starting the shear mixing from a temperature higher than the melting point of the solid oil component and continuously or intermittently performing the shear mixing until the temperature of the mixture of the oil phase and the aqueous phase becomes a temperature below the melting point of the solid oil component. For example, even when the shear mixing is stopped once after shear mixing to a temperature near the melting point of the solid oil component and then the shear mixing is performed again at a temperature below the melting point of the solid oil component, it is included in the production method of the present invention.

[0087] Shearing mixing can be carried out using any device capable of mixing while applying a shearing force. For example, it can be carried out by a high-speed shearing dispersion device such as a homomixer, a homodisper, a flow jet mixer, an ultra mixer, a colloid mill, or a high-pressure shearing dispersion device such as a homogenizer. However, as long as the object of the present invention can be achieved, shearing mixing may be carried out using any other device. Among them, by carrying out shearing mixing using a homomixer, a more homogeneous and stable finely dispersed composition of oil can be created. The rotational speed when using a high-speed shearing dispersion device or the pressure when using a high-pressure shearing dispersion device varies depending on the type and power of the device used and is not particularly limited. For example, the rotational speed when using a high-speed shearing dispersion device such as a homomixer is preferably 500 to 15,000 rpm, more preferably 1,000 to 10,000 rpm, and even more preferably 4,000 to 9,000 rpm. If the rotational speed of the high-speed shearing dispersion device is less than 500 rpm, it may not be possible to form oil fine particles of the expected size. Also, even if the rotational speed is increased beyond 10,000 rpm, the effect of further atomization cannot be increased. Also, the pressure when using a high-pressure shearing dispersion device such as a homogenizer is preferably 50 to 1000 kgf / cm 2 , more preferably 100 to 500 kgf / cm 2 , even more preferably 200 to 400 kgf / cm 2 . If the pressure of the high-pressure shearing dispersion device is less than 50 kgf / cm 2 , it may not be possible to form oil fine particles of the expected size. Also, even if the pressure is increased beyond 1000 kgf / cm 2 , the effect of further atomization cannot be increased.

[0088] The time for shearing mixing varies depending on the time required to bring the temperature of the mixture of the oil phase and the liquid phase to a temperature below the melting point of the solid oil content and is not particularly limited. However, it is preferably 1 minute to 60 minutes, more preferably 2 minutes to 30 minutes, and even more preferably 3 minutes to 10 minutes.

[0089] Furthermore, after the dispersion step by shear mixing, it is preferable to stir the dispersion in order to enhance homogeneity and stability. Stirring is usually carried out at a relatively low rotational speed of, for example, 10 to 1500 rpm, more preferably about 20 to 300 rpm, for, example, 30 minutes to 10 hours, more preferably 1 hour to 4 hours, by a low-speed stirring device such as a propeller mixer, paddle mixer, anchor mixer, gate mixer, planetary mixer, etc. In this way, desired oily particles can be produced, but the method for producing the oily particles is not limited thereto.

[0090] <External composition> As another aspect of the present invention, there may be provided an external composition in which the oily particles, which are one aspect of the present invention, are dispersed in an aqueous solvent. Such an external composition can be used, for example, by application on the skin of humans and animals, and can also be used as a cosmetic or a topical skin preparation. The cosmetic is not particularly limited, and examples thereof include skin care cosmetics (also referred to as basic cosmetics) such as lotion, essence, emulsion, cream, liquid facial wash, etc.; makeup cosmetics (also referred to as makeup cosmetics) such as foundation, blush, lipstick, gloss, eyebrow pencil, eyeliner, eyeshadow, mascara, nail polish, perfume, etc.; hair and scalp cosmetics such as shampoo, hair conditioner, hair treatment, hair essence, hair mist, scalp lotion, scalp cream, hair tonic, foam type hair growth agent, liquid type hair growth agent, etc. In the present embodiment, the cosmetic is preferably a makeup base, sunscreen, or hair and scalp cosmetic.

[0091] In addition, the external composition, which is one aspect of the present invention, can also be provided as a product in a form where fine oily particles can be observed in the aqueous phase, taking advantage of the characteristics of the lipid shell, that is, a form where "emulsified particles can be seen".

[0092] As the aqueous solvent, there can be mentioned a solvent that can be regarded as water or the same as water with respect to the oil-based particles, which can maintain the form of the oil-based particles, which is one aspect of the present invention, and can maintain its stability. Specifically, there can be mentioned an aqueous solution containing a lower alcohol, a polyhydric alcohol, a preservative, a pH adjuster, a sequestering agent, a neutralizing agent, an antioxidant, a pigment, and the like.

[0093] The oil-based particles related to one aspect of the present invention can be used as one element added in the manufacturing process of a general external composition, and an external composition in various dosage forms and forms can be provided. That is, this oil-based particle can be used for any dosage form of external composition, such as a solution type, a solubilized type, an emulsion system, a powder dispersion system, a water-powder two-phase type, a water-oil-powder three-phase type, and the like.

[0094] The external composition related to one aspect of the present invention can take any product form, and for example, it can be used as an external composition for the face, body, or scalp and hair, such as lotion, emulsion, cream, pack, and the like.

[0095] <Other components> The oil-based particles, which are one aspect of the present invention, can be blended with water-soluble or oil-soluble components in addition to the above-mentioned components as long as they do not deviate from the gist of the present invention. Such components include, for example, in the aqueous phase, in addition to general aqueous humectants such as glycerin, dipropylene glycol, 1,3-butylene glycol, other aqueous solvents such as lower alcohols represented by ethanol can be blended. Also, if necessary, other water-soluble components, for example, water-soluble drugs such as arbutin, ascorbic acid and its derivatives, tranexamic acid and its derivatives can be blended. Furthermore, water-soluble ultraviolet absorbers, ultraviolet scattering agents, whitening agents, thickeners, antioxidants, antibacterial preservatives, chelating agents, vitamins, hormones, natural extracts extracted with alcohols such as sex alcohols, pH adjusters, preservatives, pigments, fragrances, and the like can be mentioned.

[0096] In particular, the aqueous phase may contain a water-soluble thickener. The water-soluble thickener increases the viscosity of the composition and helps the oil fine particles to be stably dispersed in the aqueous phase. It also has a function of adjusting the viscosity of the composition to a viscosity suitable for use. The water-soluble thickener is not particularly limited as long as it can thicken an aqueous solvent, and examples thereof include water-soluble polymers that can thicken an aqueous solvent. Such water-soluble polymers include plant-based polymers, microbial polymers, animal-based polymers, cellulose-based polymers, alginic acid-based polymers, vinyl-based polymers, acrylic-based polymers, and inorganic water-soluble polymers.

[0097] Specific examples of water-soluble polymers other than the above (F) (acrylates / acrylic acid alkyl (C10-30)) cross-polymer include, as plant-based polymers, gum arabic, tragacanth gum, galactan, carob gum, guar gum, karaya gum, carrageenan, pectin, agar, quince seed (quince), algocolloid (brown seaweed extract), and the like.

[0098] Examples of microbial polymers include dextran, succinoglucan, pullulan, xanthan gum, and the like.

[0099] Examples of animal-based polymers include collagen, casein, albumin, gelatin, and the like. Examples of cellulose-based polymers include methyl cellulose, nitrocellulose, ethyl cellulose, methyl hydroxypropyl cellulose, hydroxyethyl cellulose, sodium cellulose sulfate, hydroxypropyl cellulose, sodium carboxymethyl cellulose, crystalline cellulose, cellulose powder, and the like.

[0100] Examples of alginic acid-based polymers include sodium alginate, propylene glycol alginate, and the like.

[0101] Examples of vinyl-based polymers include polyvinyl alcohol, polyvinyl methyl ether, polyvinyl pyrrolidone, carboxyvinyl polymer, alkyl-modified carboxyvinyl polymer, and the like.

[0102] Examples of acrylic polymers include polyoxyethylene polymers, polyoxyethylene-polyoxypropylene copolymer polymers, sodium polyacrylate, polyethyl acrylate, polyacrylamide, and the like.

[0103] Examples of inorganic water-soluble polymers include polyethyleneimine, cationic polymers, bentonite, magnesium aluminum silicate, laponite, hectorite, and silicic anhydride. In addition to the above (F) (acrylates / alkyl acrylate (C10-30)) cross-polymer, when agar is used as a water-soluble thickener, a new feel of use that cannot be obtained when using other water-soluble thickeners can be brought about. Furthermore, a thickener composed of microgel described in JP-A-2004-43785 may be used in the present invention.

[0104] In the oil phase, sterols, ultraviolet absorbers such as octyl paramethoxycinnamate and 2-hydroxy-4-methoxybenzophenone, ultraviolet scattering agents, whitening agents, moisturizing agents, thickeners, antioxidants, antibacterial and preservative agents, chelating agents, vitamins such as vitamin A and its derivatives, vitamin D and its derivatives, vitamin E and its derivatives, vitamin K and its derivatives, hormones, arginine, amino acids, anti-inflammatory agents, antibacterial agents, astringents, cooling agents, sterols, extracts derived from animals, plants or microorganisms, alcohols, polymer substances, neutralizing agents, pH adjusters, oil-soluble drugs, pigments, fragrances, etc. may be blended in the oil phase. Also, those obtained by hydrophobically treating the surface of crystals of water-soluble drugs such as vitamin C and arbutin may be dispersed in the oil phase. Furthermore, an oil-soluble drug may be blended in the oil phase.

[0105] Specific examples of the components that may be contained in the oil particles of one embodiment of the present invention are as follows.

[0106] For example, in addition to the above-mentioned ultraviolet polar oil, any commonly used ultraviolet absorber can also be used. Specifically, sodium hydroxymethoxybenzophenone sulfonate, sodium dihydroxydimethoxybenzophenone disulfonate, hydroxymethoxybenzophenone sulfonic acid and its trihydrate, phenylbenzimidazole sulfonic acid, ferulic acid, terephthalylidene disorbitol sulfonic acid, benzylidene sorbitol sulfonic acid, etc. are examples. In particular, it is preferable to combine and blend sodium hydroxymethoxybenzophenone sulfonate with ethylhexyl methoxycinnamate, bis(ethylhexyl) oxy-phenol methoxyphenyl triazine, and hexyl diethylaminohydroxybenzoyl benzoate, which are ultraviolet-absorbing polar oils.

[0107] When the oily particles, which are one aspect of the present invention, are used as a sunscreen, in addition to the above-mentioned ultraviolet absorbers, an ultraviolet scatterer may be contained. As the ultraviolet scatterer, any particles can be used as long as they are powder particles having an ultraviolet scattering effect. For example, fine particle titanium oxide, fine particle zinc oxide, etc. can be mentioned. Specifically, in addition to titanium oxide, octyltriethoxysilane-treated fine particle zinc oxide and dextrin palmitate-treated fine particle zinc oxide can also be mentioned, but are not limited thereto.

[0108] Examples of the whitening agent include tranexamic acid, potassium 4-methoxysalicylate, and nicotinamide.

[0109] Examples of the humectant include glycerin, 1,3-butylene glycol, polyethylene glycol, sorbitol, xylitol, maltitol, etc.

[0110] Examples of thickeners include plant-based polymers (e.g., gum arabic, tragacanth gum, galactan, guar gum, carrageenan, etc.), microbial-based polymers (e.g., xanthan gum, dextran, succinoglycan, pullulan, etc.), animal-based polymers (e.g., collagen, casein, albumin, gelatin, etc.), starch-based polymers (e.g., carboxymethyl starch, methylhydroxypropyl starch, etc.), alginic acid-based polymers (e.g., sodium alginate, propylene glycol alginate, etc.). Synthetic cross-polymers such as dimethylacrylamide / sodium acryloyldimethyltaurate cross-polymer may also be used. In particular, components similar to (acryloyldimethyltaurine ammonium / VP) copolymer and the above (F) (acrylates / alkyl acrylate (C10-30)) cross-polymer are preferred.

[0111] Examples of antioxidants include butylhydroxytoluene, tocopherol, phytic acid, ascorbic acid, sodium pyrosulfite, etc. Examples of antibacterial and preservative agents include benzoic acid, sodium benzoate, salicylic acid, sorbic acid, alkyl paraoxybenzoate (ethyl paraben, butyl paraben, etc.), methyl paraben, sodium dehydroacetate, phenoxyethanol, hexachlorophene, etc. Examples of chelating agents include salicylic acid, edetic acid, metaphosphoric acid, etc.

[0112] Examples of vitamins include vitamin A and its derivatives, vitamin B6 hydrochloride, vitamin B6 tripalmitate, vitamin B6 dioctanoate, vitamin B2 and its derivatives, vitamin B12, vitamin B15 and its derivatives, etc. (vitamin B group), ascorbic acid, ascorbic acid sulfate (salt), ascorbic acid phosphate (salt), ascorbic acid dipalmitate, etc. (vitamin C group), α-tocopherol, β-tocopherol, γ-tocopherol, vitamin E-acetate, vitamin E-nicotinate, etc. (vitamin E group), vitamin D group, vitamin H, pantothenic acid, pantothenol, etc. (vitamins), nicotinamide, benzyl nicotinate, γ-oryzanol, allantoin, glycyrrhizic acid (salt), glycyrrhetinic acid and its derivatives, hinokitiol, muscin, bisabolol, eucalyptol, thymol inositol, pantothenyl ethyl ether, ethinyl estradiol, cephalandine, placenta extract, etc.

[0113] Examples of alcohols include ethanol, propanol, isopropanol, isobutyl alcohol, t-butyl alcohol, etc.

[0114] Examples of polymeric substances include plant polymers such as polyhydric alcohols, gum arabic, tragacanth gum, galactan, guar gum, carob gum, karaya gum, gellan gum, and carrageenan; microbial polymers such as xanthan gum, dextran, succinoglucan, pullulan, and sodium bihyaluronate; animal polymers such as collagen, casein, and gelatin; starch polymers such as carboxymethyl starch and methylhydroxypropyl starch; cellulose polymers such as methylcellulose, ethylcellulose, methylhydroxypropyl cellulose, hydroxyethyl cellulose, sodium cellulose sulfate, hydroxypropyl cellulose, sodium carboxymethyl cellulose, and crystalline cellulose; alginic acid polymers such as sodium alginate and propylene glycol alginate; vinyl polymers such as polyvinyl alcohol, polyvinyl acetate, polyvinyl methyl ether, polyvinyl pyrrolidone, a copolymer of vinyl pyrrolidone and vinyl acetate, and carboxyvinyl polymer; acrylic polymers such as sodium polyacrylate, polyethyl acrylate, alkanolamine polyacrylate, a copolymer of alkyl methacrylate and dimethylaminoethyl methacrylate, poly-2-acrylamido-2-methylpropanesulfonic acid, and polymethacryloyloxytrimethylammonium; and polymers containing 2-methacryloyloxyethyl phosphorylcholine as a monomer, among others.

[0115] In addition, acyl sarcosine acids such as sodium lauroyl sarcosinate, glutathione; α-hydroxy acids such as organic acids such as aminocaproic acid, citric acid, malic acid, lactic acid, glycolic acid, tartaric acid, and salts of these with sodium, potassium, etc., and ginseng, clara, kounoene, orange, sage, sawtooth grass, zeni aoii, senkyu, assemblage, thyme, toki, tohii, birch, sugina, loofah, chestnut, snowdrop, boxwood, chamomile, arnica, lily, mugwort, peony, aloe, gardenia, sawara, royal jelly, placenta extract, pantothenyl ethyl ether, dipotassium glycyrrhizinate, biotin, pyridoxine hydrochloride, adenosine triphosphate, α-lipoic acid, 3-O-ethyl ascorbic acid, magnesium ascorbyl phosphate, arbutin, glucosyl hesperidin, glucosyl rutin, etc. can be mentioned. These substances can be blended within a range that does not impair the effects of the present invention.

Example

[0116] The following are examples regarding oil particles, which are one aspect of the present invention. Those skilled in the art can understand that the substances, formulations, ratios, methods, etc. used in this example can be appropriately changed without departing from the spirit of the present invention. Also, the description of this example is not intended to limit the present invention to the scope of the example. The blending amount “%” in the following examples, etc. represents “mass %” unless otherwise specified.

[0117] 〔Examples 1 to 8 and Comparative Examples 1 and 2〕 Oil particles having the compositions listed in the following tables were prepared according to a conventional method, and the combination of the ratio of the oil gelling agent and the polar oil in which the oil particles were formed was examined in the following examples.

[0118] As a specific evaluation method, after preparing the oil particles, the passage of the oil particles was observed at 25°C for 2 weeks and evaluated as follows. A: The shape of the oil particles did not change B: Approximately 20% of the oil particles aggregated (united) C: Approximately 2 to 50% of the oil particles aggregated (united) D: More than 50% of the oil-based particles aggregated (united), or no oil-based particles were formed at the time of production. The results are shown in Tables 1 and 2 below.

[0119]

Table 1

[0120]

Table 2

[0121]

Table 3

Claims

Claim 1 An oily particle having an average particle diameter of 0.05 to 10 mm, comprising: (A) a polar oil and (B) an oily gelling agent having a melting point of 60°C or higher, wherein the ratio of the (A) polar oil in the total mass of the oily particles is 30% by mass or more, the (B) oily gelling agent consists of at least one component selected from dibutyl lauroyl glutamide and dibutyl ethylhexanoyl glutamide, and the (A) polar oil contains an ultraviolet-absorbing polar oil, the oily particle. Claim 2 The oily particle according to claim 1, further comprising (C) plate-like powder and / or (D) higher alcohol. Claim 3 The oily particle according to claim 2, wherein the (C) plate-like powder is talc and / or mica. particle. Claim 4 An oily particle further comprising (E) a surfactant, wherein the blending amount of the surfactant is 0.5 % or less, the oily particle according to any one of claims 1 to 3. Claim 5 The oily particle according to any one of claims 1 to 4, further comprising (F) (acrylates / acrylic acid alkyl (C10-30)) cross-polymer. Claim 6 An external composition in which the oily particle according to any one of claims 1 to 5 is dispersed in an aqueous solvent.

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