Oil-in-water emulsion composition

Abstract

One embodiment of the present invention is an oil-in-water emulsion composition in which oil-based particles, which comprise a solid oil comprising a naturally derived wax having a melting point of 50 DEG C or higher, a liquid oil comprising a polar oil and a hydrocarbon oil having a branched structure, and a powder, are dispersed in an aqueous phase, and the mass ratio of the wax to the hydrocarbon oil is 0.01-10.

Description

Technical Field

[0001] The present invention relates to an oil-in-water emulsion composition. Background Art

[0002] Oil-in-water emulsions in which oily particles are dispersed in an aqueous phase cover the skin surface with an oil film, thereby preventing water evaporation, protecting the skin from dryness, and imparting a moisturizing effect to the skin, and are therefore suitable for various cosmetics. Oil-in-water emulsions contain a variety of ingredients in order to obtain the desired quality characteristics.

[0003] For example, Patent Document 1 discloses an oil-in-water cosmetic containing fatty acid soap, silicone oil, batyl alcohol, and water-swelling clay mineral. It is also described that the oil-in-water cosmetic contains an aqueous phase and an oil phase, and the oil phase may contain, for example, hydrocarbons, waxes, etc., regardless of the source of animal oil, vegetable oil, synthetic oil, etc., and the properties of solid, semi-solid oil, and liquid oil.

[0004] [Prior art literature]

[0005] [Patent Literature]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 2018-16587 Summary of the invention

[0007] [Problems to be solved by the invention]

[0008] In recent years, due to the increasing preference for nature, there is a demand for oil-in-water emulsion compositions containing ingredients of natural origin. However, solid oils of natural origin contain many impurities and are difficult to dissolve in other ingredients constituting the oil phase compared to many synthetic solid oils, and sometimes precipitates are generated.

[0009] An object of one embodiment of the present invention is to provide an oil-in-water emulsion composition containing a naturally-derived solid oil and capable of well dissolving the naturally-derived solid oil in an oil phase.

[0010]

Methods to solve the problem

[0011] One embodiment of the present invention is an oil-in-water emulsion composition containing solid oil, liquid oil and powdered oily particles dispersed in an aqueous phase, wherein the solid oil is composed of waxes of natural origin having a melting point of 50° C. or above, and the liquid oil contains polar oil and a hydrocarbon oil having a branched structure, and the mass ratio of the wax to the hydrocarbon oil is 0.01 to 10.

[0012] [Effects of the Invention]

[0013] The oil-in-water emulsion composition according to one embodiment of the present invention contains a naturally-derived solid oil and can well dissolve the naturally-derived solid oil in an oil phase. DETAILED DESCRIPTION

[0014] Hereinafter, embodiments of the present invention will be described in detail. In addition, the embodiments are not limited by the following descriptions and can be appropriately changed without departing from the scope of the gist of the present invention. In addition, in this specification, " to " indicating a numerical range means that, if there is no other description, the numerical values ​​recorded before and after are included as lower limits and upper limits.

[0015] The water-in-oil emulsion composition involved in this embodiment contains oily particles of solid oil, liquid oil and powder dispersed in the aqueous phase. That is, the oil phase contains solid oil, liquid oil and powder. In addition, the solid oil is composed of waxes of natural origin with a melting point of more than 50°C, and the liquid oil contains polar oil and hydrocarbon oil with a branched structure, and the mass ratio of the waxes to the hydrocarbon oil is 0.01 to 10. In addition, in this specification, "solid oil" refers to oil that is solid or semi-solid at room temperature (25°C), and "liquid oil" refers to oil that is liquid at room temperature (25°C).

[0016] With this configuration, the oil-in-water emulsion composition contains the naturally-derived solid oil, suppresses precipitation from the naturally-derived solid oil, and can well dissolve the naturally-derived solid oil in the oil phase.

[0017] The average particle size of the oily particles may be 50 μm to 10 mm. When the average particle size of the oily particles is 50 μm to 10 mm, the oil-in-water emulsion composition can give the user a feeling of use such as a moist and refreshing feeling or a moist feeling after a period of time when applied to the skin. In addition, in the oil-in-water emulsion composition, oily particles of a size visible to the naked eye are dispersed in the water phase, thereby giving the user a sense of beauty.

[0018] Hereinafter, each component constituting the oil-in-water emulsion composition according to the present embodiment will be described in detail.

[0019] The solid oil is composed of naturally occurring waxes having a melting point of 50° C. or higher. Examples of naturally occurring waxes having a melting point of 50° C. or higher include carnauba wax (melting point: 82 to 86° C.), candelilla wax (melting point: 68 to 72° C.), beeswax (melting point: 62 to 65° C.), and rice bran wax (melting point: 70 to 83° C.). These solid oils may be used alone or in combination of two or more.

[0020] When the solid oil is composed of a natural wax having a melting point of 50°C or higher, a film composed of the natural wax is formed on the outside of the oily particles, which can inhibit the adhesion between the oily particles. Therefore, the oily particles can be stably dispersed in the aqueous phase. The melting point of the natural wax is preferably 60°C or higher.

[0021] The naturally derived wax having a melting point of 50° C. or higher is preferably candelilla wax or carnauba wax. When the wax is candelilla wax or carnauba wax, the naturally derived solid oil can be dissolved better in the oil phase. In addition, since the oil particles can be made moderately hard, when the oil-in-water emulsion composition is applied to the skin, the user can feel that the skin is well protected.

[0022] The content of the naturally derived wax having a melting point of 50° C. or higher is preferably 0.01% to 5% by mass, more preferably 0.1% to 3% by mass, and further preferably 0.3% to 2% by mass, relative to the oil-in-water emulsion composition. When the content of the naturally derived wax having a melting point of 50° C. or higher is 0.01% to 5% by mass relative to the oil-in-water emulsion composition, the naturally derived solid oil can be better dissolved in the oil phase.

[0023] The mass ratio of the naturally-derived wax having a melting point of 50° C. or higher to the hydrocarbon oil is more preferably 0.05 to 2, and further preferably 0.1 to 1. When the mass ratio of the naturally-derived wax having a melting point of 50° C. or higher to the hydrocarbon oil is 0.01 to 10, the naturally-derived solid oil can be better dissolved in the oil phase.

[0024] The liquid oil includes polar oil and hydrocarbon oil having a branched structure. The polar oil is not particularly limited as long as it is a polar oil generally mixed in cosmetics and the like. Examples of the polar oil include diisopropyl sebacate, pentaerythritol tetraethylhexanoate, cetyl ethylhexanoate, jojoba oil, di(phytosteryl / octyldodecyl) lauroyl glutamate, triisostearin, glyceryl diisostearate, triethylhexanoin, dimer dilinoleic acid (phytosteryl / behenyl), dimer dilinoleic acid (phytosteryl / isostearyl / cetyl / stearyl / isostearyl / cetyl / stearyl / behenyl), isopropyl palmitate, phytosteryl macadamia fatty acid esters, pentaerythritol tetra(behenic acid / benzoic acid / ethylhexanoate), ethylhexyl palmitate, myristyl myristate, isopropyl myristate, tripropylene glycol dipivalate, and isodecyl neopentanoate.

[0025] The content of the polar oil is preferably equal to or less than the content of the hydrocarbon oil in the oil-in-water emulsion. When the content of the polar oil is equal to or less than the content of the hydrocarbon oil in the oil-in-water emulsion, the solid oil of natural origin can be well dissolved in the oil phase. At the same time, the oily particles can be made moderately hard, so that the oil-in-water emulsion can exert good usability. In addition, the formation and stability of the oily particles can be improved.

[0026] Examples of the hydrocarbon oil having a branched structure include squalane, hydrogenated polyisobutene, hydrogenated polydecene, isohexadecane, etc. Squalane includes naturally derived squalane such as animal squalane and plant squalane, and synthetic squalane.

[0027] The number of carbon atoms of the hydrocarbon oil having a branched structure is preferably 10 to 40. When the number of carbon atoms of the hydrocarbon oil having a branched structure is 10 to 40, the solid oil of natural origin can be better dissolved in the oil phase. In addition, the strength of the oily particles can be improved, and the oily particles can be stably dispersed in the water phase. Furthermore, when the oil-in-water emulsion composition is applied to the skin, it gives the user a so-called good skin-friendly feeling.

[0028] The hydrocarbon oil having a branched structure is preferably squalane of natural origin. Thus, the oil-in-water emulsion composition contains a solid oil of natural origin and a liquid oil of natural origin, and the solid oil of natural origin can be well dissolved in the oil phase.

[0029] The content of the hydrocarbon oil having a branched structure is preferably 0.01% to 10% by mass, more preferably 0.5% to 5% by mass, and further preferably 0.1% to 3% by mass relative to the oil-in-water emulsion composition. When the content of the hydrocarbon oil having a branched structure is 0.01% to 10% by mass relative to the oil-in-water emulsion composition, the solid oil of natural origin can be better dissolved in the oil phase.

[0030] Liquid oil may contain a small amount of silicone oil in addition to polar oil and hydrocarbon oil. Examples of silicone oil include chain silicones such as dimethylpolysiloxane (polydimethylsiloxane), methylphenylpolysiloxane (phenylpolydimethylsiloxane), methylhydrogenpolysiloxane, cyclic silicones such as decamethylcyclopentasiloxane and dodecamethylcyclohexasiloxane, amino-modified silicone oil, polyether-modified silicone oil, carboxyl-modified silicone oil, alkyl-modified silicone oil, ammonium salt-modified silicone oil, and modified silicones such as fluorine-modified silicone oil.

[0031] When the liquid oil contains a trace amount of silicone oil, the content of the silicone oil is preferably 5 mass % or less, more preferably 3 mass % or less, further preferably 2 mass % or less, further preferably 1 mass % or less, further preferably 0.1 mass % or less, relative to the oil-in-water emulsion composition. The liquid oil particularly preferably does not contain silicone oil.

[0032] The content of silicone oil is preferably 30% by mass or less, more preferably 20% by mass or less, and further preferably 10% by mass or less, based on the total amount of solid oil and liquid oil. The liquid oil particularly preferably contains no silicone oil.

[0033] In general, the liquid oil of an oil-in-water emulsion composition contains silicone oil in order to improve stability and feel during use. However, the liquid oil of the oil-in-water emulsion composition of the present embodiment does not contain silicone oil, and thus a silicone-free oil-in-water emulsion composition, which has been increasingly in demand in recent years, can be provided.

[0034] The powder may be a hydrophobic powder because it is contained in the oily particles. The hydrophobic powder includes a hydrophobic powder that has not been subjected to a surface hydrophilization treatment and a hydrophobic or hydrophilic powder that has been subjected to a surface treatment with a hydrophobic substance.

[0035] The powder is not particularly limited as long as it can be mixed with a skin external preparation such as a cosmetic. Examples of the powder include inorganic powders such as talc, mica, kaolin, mica, sericite, muscovite, phlogopite, synthetic mica, red mica, biotite, lepidolite, vermiculite, magnesium carbonate, calcium carbonate, aluminum silicate, barium silicate, calcium silicate, magnesium silicate, strontium silicate, metal tungstate, magnesium, spherical silica, zeolite, barium sulfate, calcined calcium sulfate (calcined gypsum), calcium phosphate, fluoroapatite, hydroxyapatite, ceramic powder, metal soap (zinc myristate, calcium palmitate, calcium stearate, aluminum stearate, etc.), and boron nitride; and spherical powders such as polyamide spherical resin powder (nylon spherical powder), spherical polyethylene, cross-linked poly(methyl)acrylate spherical resin powder, spherical polyester, cross-linked polystyrene spherical resin powder, styrene and acrylic acid copolymer spherical resin powder, benzoguanamine spherical resin powder, polytetrafluoroethylene spherical powder, and spherical cellulose. Organic powder; inorganic white pigments such as titanium dioxide and zinc oxide; inorganic red pigments such as iron oxide (ferric oxide) and iron titanate; inorganic brown pigments such as γ-iron oxide; inorganic yellow pigments such as yellow iron oxide and ochre; inorganic black pigments such as black iron oxide, carbon black, and low-order titanium oxide; inorganic purple pigments such as mango purple and cobalt purple; inorganic green pigments such as chromium oxide, chromium hydroxide, and cobalt titanate; inorganic cyan pigments such as ultramarine and cyan blue; pearl pigments such as titanium oxide-coated mica, titanium oxide-coated bismuth oxychloride, titanium oxide-coated talc, colored titanium oxide-coated mica, bismuth oxychloride, borosilicate (Ca / Al), and fish scale foil; metal powder pigments such as aluminum powder and copper powder; colorants such as red, yellow, orange, yellow, green, and cyan, or colorants (organic pigments) obtained by coloring them with zirconium, barium, or aluminum; natural pigments such as chlorophyll and β-carotene.

[0036] Examples of the powder surface-treated with a hydrophobic substance include ultraviolet scattering agents such as Al stearate-coated titanium oxide, Mg isostearate-coated titanium oxide, and dextrin palmitate-coated zinc oxide, and hydrophobized talc.

[0037] The powder preferably contains amino acid, amino acid derivative, or a powder coated with amino acid or amino acid derivative. As amino acid, for example, glutamic acid, etc. can be cited. As amino acid derivative, for example, amino acid surfactants such as lauroyl lysine, cocoyl glutamic acid K, cocoyl glycine Na, etc. can be cited. As a powder coated with amino acid or amino acid derivative, for example, dilauroyl glutamic acid lysine Na coated iron oxide (red), dilauroyl glutamic acid lysine Na coated titanium oxide, stearoyl glutamic acid disodium, palmitoyl glutamic acid Mg, cocoyl glutamic acid disodium, etc., can be cited. By containing amino acid, amino acid derivative or a powder coated with amino acid or amino acid derivative, the water-in-oil emulsion composition can better dissolve the solid oil of natural origin in the oil phase.

[0038] The amino acid derivative is preferably lauroyl lysine. When the amino acid derivative is lauroyl lysine, the oily particles of the water-in-oil emulsion composition contain the solid oil of natural origin and the powder of natural origin, and the solid oil of natural origin can be better dissolved in the oil phase. In addition, lauroyl lysine has a relatively small friction coefficient compared to the other powders mentioned above, so when the water-in-oil emulsion composition is applied to the skin, it can give the user a smooth and soft feeling of use.

[0039] The average primary particle size of the powder is preferably 0.01 to 15 μm, more preferably 0.05 to 12 μm, and further preferably 0.1 to 10 μm. When the average primary particle size of the powder is 0.01 to 15 μm, the solid oil of natural origin can be better dissolved in the oil phase.

[0040] The content of the powder is preferably 0.01% to 30% by mass, more preferably 0.1% to 20% by mass, and further preferably 0.5% to 10% by mass, relative to the total amount of the naturally derived waxes having a melting point of 50° C. or higher and the hydrocarbon oil having a branched structure. When the content of the powder is 0.01% to 30% by mass relative to the total amount of the naturally derived waxes having a melting point of 50° C. or higher and the hydrocarbon oil having a branched structure, the naturally derived solid oil can be better dissolved in the oil phase.

[0041] When the powder is an ultraviolet scattering agent, the upper limit of the content of the ultraviolet scattering agent is preferably 1% by mass relative to the oil-in-water emulsion composition. Specifically, the content of the ultraviolet scattering agent is preferably 0.0001% by mass to 1% by mass relative to the oil-in-water emulsion composition. When the upper limit of the content of the ultraviolet scattering agent is 1% by mass relative to the oil-in-water emulsion composition, the solid oil of natural origin can be better dissolved in the oil phase, and at the same time, the oil-in-water emulsion composition can exert an ultraviolet protection effect.

[0042] The aqueous phase contains a general aqueous medium and is a dispersion medium for the oily particles. Examples of the aqueous medium include water and ethanol. The aqueous medium may be used alone or in combination of two or more.

[0043] The content of the aqueous medium is preferably 50 to 99% by mass, more preferably 60 to 98% by mass, and further preferably 70 to 95% by mass, based on the oil-in-water emulsion composition.

[0044] The oil-in-water emulsion composition may contain, in addition to the above-mentioned essential components, other components that can be mixed with external skin preparations such as cosmetics within a range that does not inhibit the effects of the present invention.

[0045] Other ingredients that can be mixed with the oil-in-water emulsion composition are not limited, and examples thereof include water-soluble thickeners, oil-soluble thickeners, water-soluble drugs such as arbutin, ascorbyl glucoside, tranexamic acid, and 4-methoxysalicylate, moisturizers such as glycerin, dipropylene glycol, 1,3-butylene glycol, and propylene glycol, water-soluble ultraviolet absorbers such as dimorpholinopyridazinone, chelating agents such as sodium ethylenediaminetetraacetic acid and potassium hydroxide, pH adjusters such as citric acid and sodium citrate, preservatives such as parabens and phenoxyethanol, pigments, fragrances, and surfactants.

[0046] The water-soluble thickener is not particularly limited, and examples thereof include plant-based polymers such as gum arabic, tragacanth, galactose, carob bean gum, guar gum, karaya gum, carrageenan, pectin, agar, quince seeds (Marmelo), algae colloid (brown algae extract), microbial polymers such as dextran, succinyl glucan, and pullulan, animal-based polymers such as collagen, casein, albumin, and gelatin, and fibers such as methylcellulose, nitrocellulose, ethylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, sodium cellulose sulfate, hydroxypropylcellulose, sodium carboxymethylcellulose, crystalline cellulose, and cellulose powder. Elemental polymers, alginic acid polymers such as sodium alginate and propylene glycol alginate, vinyl polymers such as polyvinyl alcohol, polyvinyl methyl ether, polyvinyl pyrrolidone, carboxyvinyl polymers, alkyl-modified carboxyvinyl polymers, polyoxyethylene polymers, polyoxyethylene-polyoxypropylene copolymer polymers, acrylic polymers such as sodium polyacrylate, polyethyl acrylate, polyacrylamide, (ammonium acryloyldimethyltaurate / VP) copolymer, polyethyleneimine, cationic polymers, bentonite, aluminum magnesium silicate, laponite (Laponite), hectorite, silicic anhydride and the like. Inorganic water-soluble polymers, etc.

[0047] As a water-soluble thickener, alkyl-modified carboxyvinyl polymers are particularly suitable because they play a role in inhibiting the aggregation and unification of oily particles due to their interfacial activity. Alkyl-modified carboxyvinyl polymers are also called acrylic acid methacrylate alkyl ester copolymers ((acrylate / alkyl acrylate (C10-30)) crosslinked polymers), and are commercially available under the trade names of CARBOPOL (registered trademark) 1342, PEMULEN (registered trademark) TR-1, and PEMULEN (registered trademark) TR-2 (manufactured by BF Goodrich Co., Ltd.).

[0048] The oil-soluble thickener can be adjusted to reduce the solidifying power of the solid oil constituting the oily particles and to present an appropriate hardness. The oil-soluble thickener is not particularly limited, and examples thereof include dextrin fatty acid esters, metal soaps, lipophilic bentonite, sucrose fatty acid esters, benzylidene derivatives of sorbitol, and the like.

[0049] Examples of the dextrin fatty acid ester include dextrin palmitate, dextrin oleate, and dextrin stearate.

[0050] Examples of the metal soap include aluminum stearate, magnesium stearate, and zinc myristate in which a hydroxyl group remains.

[0051] Examples of the lipophilic bentonite include dimethylbenzyldodecyl ammonium montmorillonite and dimethyldioctadecyl ammonium montmorillonite.

[0052] Examples of sucrose fatty acid esters include sucrose in which three or less of eight hydroxyl groups are esterified with higher fatty acids, and the higher fatty acids are stearic acid and palmitic acid.

[0053] Examples of the benzylidene derivative of sorbitol include monobenzylidene sorbitol and dibenzylidene sorbitol.

[0054] Among them, palmitic acid dextrin is particularly preferably used as the oil-soluble thickener from the viewpoint of stability and usability. The dextrin fatty acid ester is not particularly limited, and commercially available products such as Rheopearl (registered trademark) KL and Rheopearl (registered trademark) KE (manufactured by Chiba Flour Milling Co., Ltd.) can be used.

[0055] The water-in-oil emulsion composition can be prepared, for example, by the following method. First, the water phase components are mixed and heated to above the melting point of the mixed solid oil, and the oil phase components (including solid oil, liquid oil, powder) mixed and heated at the same temperature are added to the water phase components under stirring. At this time, in the water-in-oil emulsion composition of the present embodiment, the solid oil of natural origin is well dissolved in the oil phase, thereby obtaining a uniform oil phase. Stirring can be carried out using a spiral blade or paddle mixer with a rotation number of 10 to 1500 rpm, preferably about 20 to 300 rpm. In addition, if a homogenizing mixer is used for stirring, it will be micronized, so it is not preferred. Next, it can be prepared by cooling while stirring.

[0056] The oil-in-water emulsion composition thus produced has oil particles with an average particle size of 50 μm to 10 mm dispersed in the water phase. The oil particles of this embodiment can be considered to have a capsule structure in which the inner layer is substantially composed of powder and liquid oil and the solid oil (outer layer) surrounds the inner layer. In addition, the solid oil constituting the outer layer is crystallized to have a moderate hardness, which produces a unique feeling of use.

[0057] The composition of the present invention forms oily particles of the above structure without using a surfactant, but is clearly distinguished from a Pickering emulsion in which powder is present at the oil-water interface, based on the point that the powder is present inside the oily particles (inner layer) and solid oil is present at the interface between the water phase and the oil phase.

[0058] The oil-in-water emulsion composition of the present invention is suitable for use as a base for cosmetics. Examples of cosmetics using the base include water-based cosmetics, gel cosmetics, emulsified cosmetics, and the like. As specific uses, the composition can be used as cosmetics for facial care, body care, or hair such as lotions, gels, emulsions, creams, and masks.

[0059] [Example]

[0060] Hereinafter, the embodiment will be described in more detail with reference to Examples and Comparative Examples, but the embodiment is not limited to these Examples and Comparative Examples.

[0061] Oil-in-water emulsion compositions were prepared with the compositions shown in Tables 1 to 5 by the following methods, and the obtained oil-in-water emulsion compositions were evaluated by the following methods.

[0062] <Preparation of oil-in-water emulsion composition>

[0063] The aqueous phase components were mixed in the compositions shown in Tables 1 to 5, heated to a temperature above the melting point of the mixed solid oil, and the oil phase components (including solid oil, liquid oil, and powder) heated and mixed to the same temperature were added to the aqueous phase components under stirring. Subsequently, the mixture was cooled while stirring to obtain each oil-in-water emulsion composition.

[0064] Each of the prepared oil-in-water emulsion compositions was evaluated based on the following evaluation criteria for the solubility of the solid oil when the oil-in-water emulsion composition was prepared and the feel of the oil-in-water emulsion in use (how well it fits the skin).

[0065] <Evaluation of solubility of solid oil>

[0066] When preparing the oil-in-water emulsion composition, the oil phase components (including solid oil, liquid oil, and powder) were mixed and heated, and the uniformity of the oil phase was visually confirmed. C or above was considered acceptable, and the evaluation results are shown in Tables 1 to 5.

[0067] [Evaluation criteria for average score]

[0068] A: After mixing, it is quickly dissolved by heating, no precipitate, and uniform

[0069] B: Dissolved by heating after mixing, no precipitate, uniform

[0070] C: Dissolved by long-term heating after mixing, no precipitate, uniform

[0071] D: It does not dissolve even after heating.

[0072] <Evaluation of usage>

[0073] A special evaluation panel conducted an actual use test, and evaluated the feeling of use based on the following criteria from the perspective of how good the skin feels. A is acceptable, and the evaluation results are shown in Tables 1 to 5.

[0074] [Evaluation criteria]

[0075] A: Excellent

[0076] B: Slightly worse

[0077]

Table 1

[0078]

[0079]

Table 2

[0080]

[0081]

Table 3

[0082]

[0083]

Table 4

[0084]

[0085]

Table 5

[0086]

[0087] As shown in Tables 1 to 5, it is confirmed that the water-in-oil emulsion compositions of Examples 1 to 19, 21 to 24, and 26 to 30 have no problems in actual use regarding the solubility of the solid oil and the feel in use. The water-in-oil emulsion compositions of Examples 20 and 25 have no problems in actual use regarding the solubility of the solid oil, but the feel in use is slightly poor. On the other hand, the water-in-oil emulsion composition of Comparative Example 1, which does not contain powder in the oily particles, does not dissolve even when heated after the oil phase components (including solid oil, liquid oil, and powder) are mixed when the water-in-oil emulsion composition is prepared. In addition, the water-in-oil emulsion composition of Comparative Example 1 is also slightly poor in terms of feel in use.

[0088] The above embodiments are described, but the above embodiments are given as examples, and the present invention is not limited by the above embodiments. The above embodiments can be implemented in various other forms, and various combinations, omissions, substitutions, changes, etc. can be made without departing from the scope of the gist of the invention. These embodiments and their variations are included in the scope and gist of the invention, and are also included in the invention recorded in the patent claims and their equivalents.

[0089] This international application claims priority based on Japanese Patent Application No. 2022-111422 filed on July 11, 2022, the entire contents of which are incorporated herein by reference.

Claims

1. An oil-in-water emulsion composition, comprising solid oil, liquid oil and powdered oily particles dispersed in an aqueous phase, The solid oil is composed of waxes of natural origin having a melting point of 50° C. or above, The liquid oil contains polar oil and hydrocarbon oil with a branched structure. The mass ratio of the waxes to the hydrocarbon oil is 0.01 to 10. 2 . The oil-in-water emulsion composition according to claim 1 , wherein the content of the powder is 0.01% to 30% based on the total amount of the wax and the hydrocarbon oil. 3 . The oil-in-water emulsion composition according to claim 1 , wherein the hydrocarbon oil has 10 to 40 carbon atoms. 4 . The oil-in-water emulsion composition according to claim 3 , wherein the wax is candelilla wax or carnauba wax. The oil-in-water emulsion composition according to claim 4 , wherein the powder is a hydrophobic powder. 6 . The oil-in-water emulsion composition according to claim 5 , wherein the powder comprises an amino acid, an amino acid derivative, or a powder coated with an amino acid or an amino acid derivative. 7 . The oil-in-water emulsion composition according to claim 6 , wherein the amino acid derivative is lauroyl lysine. 8 . The oil-in-water emulsion composition according to claim 7 , wherein the liquid oil does not contain silicone oil. 9 . The oil-in-water emulsion composition according to claim 8 , comprising an ultraviolet scattering agent, wherein the upper limit of the content of the ultraviolet scattering agent is 1% by mass based on the oil-in-water emulsion composition. 10 . The oil-in-water emulsion composition according to claim 8 , wherein the average particle size of the oily particles is 50 μm to 10 mm.

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