Emulsified cosmetic

Abstract

To provide an emulsified cosmetic which contains a composite powder of titanium oxide and an ultraviolet absorber, has an excellent ultraviolet shielding effect, and gives a good feeling of use.SOLUTION: An emulsified cosmetic comprising a composite powder A of titanium oxide and 4-tert-butyl-4 ' - methoxydibenzoylmethane in an amount of 21% by mass or less relative to the total mass of the emulsified cosmetic, zinc oxide B, an ultraviolet absorber C other than the composite powder A of titanium oxide and 4-tert-butyl-4 ' - methoxydibenzoylmethane, a silicone oil D in an amount of 20% by mass to 60% by mass relative to the total mass of the emulsified cosmetic, and an aqueous medium E.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present disclosure relates to an emulsion cosmetic. [Background technology]

[0002] Ultraviolet rays cause photoaging, such as wrinkles, sagging, and dullness of the skin, so cosmetics contain ultraviolet protection agents, such as organic ultraviolet absorbers and inorganic ultraviolet scattering agents (e.g., metal oxides such as titanium oxide and zinc oxide), to improve the ultraviolet protection effect. To obtain sufficient UV protection, it is necessary to use a sufficient amount of UV protection agent. However, there are concerns about the effects of organic UV absorbers on the skin and the fact that UV scattering agents can make the skin appear whiter, so it is necessary to achieve both sufficient UV protection and a comfortable feel.

[0003] Of the ultraviolet rays from sunlight that reach the earth's surface, 99% are in the UVA range (wavelengths of 320 nm to 400 nm). Therefore, there is a demand for topical skin preparations such as cosmetics to contain ultraviolet absorbers that absorb ultraviolet rays in the UVA range or thereabouts. One type of organic UV absorber that can be incorporated into cosmetics for application to the skin is a composite powder formed by combining an inorganic powder with an organic UV absorber, and the use of a composite powder of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane has been proposed. 4-tert-Butyl-4'-methoxydibenzoylmethane (also known as "avobenzone") is known as a UV absorber that can absorb a wide range of UVA rays. One type of organic UV absorber blended in cosmetics is a composite powder formed by combining an inorganic powder with an organic UV absorber, and the use of a composite powder of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane has been proposed. For example, Patent Document 1 discloses a water-in-oil skin preparation containing a composite powder of titanium oxide and a UV absorber and a whitening compound, and lists 4-tert-butyl-4'-methoxydibenzoylmethane as the UV absorber contained in the composite powder of titanium oxide and a UV absorber. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2017-031081 Summary of the Invention [Problem to be solved by the invention]

[0005] Emulsion cosmetics having an ultraviolet shielding effect are desired to have a high ultraviolet shielding effect as well as a good feel when applied to the skin. A composite powder of titanium oxide and an ultraviolet absorber (hereinafter also referred to as "composite powder") has excellent ultraviolet absorption effect and is therefore useful in emulsion cosmetics where high ultraviolet shielding effect is desired, and as disclosed in Patent Document 1, various improvements have been proposed for preparations incorporating such composite powders. The composite powder described in Patent Document 1 has an excellent ultraviolet shielding effect, but increasing the content of the composite powder in order to obtain a sufficient ultraviolet shielding effect may result in a decrease in usability. One possible way to obtain sufficient UV blocking effect without increasing the content of the composite powder is to use other organic UV absorbers or inorganic UV scattering agents in combination, but new problems may arise, such as a sticky feeling when other organic UV absorbers are used, and a squeaky feeling when the content of solid UV scattering agents is increased.

[0006] An object of one embodiment of the present disclosure is to provide an emulsion cosmetic that contains a composite powder of titanium oxide and an ultraviolet absorber, has excellent ultraviolet shielding effect, and provides a pleasant feel when used. [Means for solving the problem]

[0007] Specific means for solving the above problems include the following embodiments. [1] A composite powder A of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane in an amount of 21% by mass or less relative to the total mass of the emulsion cosmetic; Zinc oxide B, an ultraviolet absorber C other than a composite powder A of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane; Silicone oil D in an amount of 20% by mass to 60% by mass relative to the total mass of the emulsion cosmetic; an aqueous medium E; An emulsified cosmetic comprising:

[0008] [2] The emulsion cosmetic according to [1], wherein the content of the composite powder A of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane is 1% by mass to 21% by mass relative to the total mass of the emulsion cosmetic. [3] The emulsion cosmetic according to [1] or [2], wherein the content of the zinc oxide B is 1% by mass to 20% by mass relative to the total mass of the emulsion cosmetic. [4] The emulsion cosmetic according to any one of [1] to [3], wherein the content of the ultraviolet absorber C other than the composite powder A of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane is 1% by mass to 20% by mass relative to the total mass of the emulsion cosmetic. [5] The emulsion cosmetic according to any one of [1] to [4], wherein the ultraviolet absorber C other than the composite powder A of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane contains ethylhexyl methoxycinnamate. [6] The emulsion cosmetic according to any one of [1] to [5], further comprising a composite powder A of the titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane, and an ultraviolet absorber F other than the ultraviolet absorber C, wherein the ultraviolet absorber F is contained in the aqueous medium E. [7] The emulsion cosmetic according to any one of [1] to [6], further comprising a silicone surfactant. [8] The emulsion cosmetic according to any one of [1] to [7], which is a sunscreen cosmetic. [Effects of the Invention]

[0009] According to one embodiment of the present disclosure, there is provided an emulsion cosmetic that contains a composite powder of titanium oxide and an ultraviolet absorber, has excellent ultraviolet shielding effect, and provides a pleasant feel when used. DETAILED DESCRIPTION OF THE INVENTION

[0010] An example of an embodiment of the emulsion cosmetic of the present disclosure will be described in detail below. The explanation of the requirements described below may be based on a representative embodiment of the present disclosure, but the present disclosure is not limited to such an embodiment and can be implemented with appropriate modifications within the scope of the purpose of the present disclosure.

[0011] In the present disclosure, a numerical range indicated using "to" means a range that includes the numerical values ​​before and after "to" as the lower and upper limits, respectively. In the numerical ranges described in stages in the present disclosure, the upper or lower limit value described in a certain numerical range may be replaced with the upper or lower limit value of another numerical range described in stages. Furthermore, in the numerical ranges described in the present disclosure, the upper or lower limit value described in a certain numerical range may be replaced with a value shown in the examples.

[0012] In the present disclosure, a combination of two or more preferred embodiments is a more preferred embodiment. In the present disclosure, the amount of each component in a water-in-oil cosmetic refers to the total amount of multiple substances present in the emulsion cosmetic, unless otherwise specified, when multiple substances corresponding to each component are present in the water-in-oil cosmetic.

[0013] Emulsion cosmetics include water-in-oil emulsion cosmetics and oil-in-water emulsion cosmetics, each of which is an emulsion containing an "oil phase" and an "aqueous phase." In the present disclosure, "oil phase" means the continuous phase in a water-in-oil formulation and the dispersed phase in an oil-in-water formulation, and includes the liquid medium of the oil phase and any components dispersed or dissolved in that liquid medium. As used herein, the term "aqueous phase" refers to the dispersed phase in a water-in-oil formulation, or the continuous phase in an oil-in-water formulation, and includes the liquid medium of the dispersed phase and any components dispersed or dissolved in that liquid medium.

[0014] In the present disclosure, "good feel in use" means that the emulsion cosmetic spreads well when applied to the skin and does not feel sticky on the skin after application. Note that in the present disclosure, "sticky" refers to the feeling after applying the emulsion cosmetic to the skin, which is a feeling of stickiness or adhesion between the fingers, etc. and the skin to which the emulsion cosmetic has been applied.

[0015] In the present disclosure, "mass %" and "weight %" are synonymous.

[0016] [Emulsion cosmetics] The emulsion cosmetic of the present disclosure contains a composite powder A of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane in an amount of 21% by mass or less relative to the total mass of the emulsion cosmetic, zinc oxide B, an ultraviolet absorber C other than the composite powder A of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane, a silicone oil D in an amount of 20% by mass to 60% by mass relative to the total mass of the emulsion cosmetic, and an aqueous medium E. The emulsion cosmetic of the present disclosure has the above-described configuration, and thus has excellent UV blocking effect and provides a good feeling when used.

[0017] [Form of emulsion cosmetics]

[0018] The emulsion cosmetic of the present disclosure may be an oil-in-water emulsion cosmetic (O / W emulsion cosmetic) or a water-in-oil emulsion cosmetic (W / O emulsion cosmetic), and the emulsion cosmetic can be selected depending on the intended use of the emulsion cosmetic. In particular, from the viewpoint of stably containing an ultraviolet absorbing component such as composite powder A, the emulsion cosmetic of the present disclosure is more preferably a water-in-oil emulsion cosmetic (W / O emulsion cosmetic).

[0019] When the emulsion cosmetic of the present disclosure is an oil-in-water emulsion (O / W emulsion) or a water-in-oil emulsion (W / O emulsion), from the viewpoints of the stability of composite powder A and the feel when used, the ratio of the aqueous phase to the oil phase, by mass, is preferably 20 / 80 to 80 / 20, and more preferably 30 / 70 to 70 / 30.

[0020] Each component contained in the emulsion cosmetic of the present disclosure will be described in detail.

[0021] [Composite Powder A of Titanium Oxide and 4-tert-butyl-4'-methoxydibenzoylmethane (Composite Powder A)] The emulsion cosmetic of the present disclosure contains composite powder A. Composite powder A is a composite powder of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane. The emulsion cosmetic of the present disclosure contains 21 mass% or less of the composite powder A relative to the total mass of the emulsion cosmetic. The emulsion cosmetic may contain one type of composite powder A alone, or two or more types.

[0022] By including composite powder A, the emulsion cosmetic of the present disclosure can improve the effectiveness of blocking ultraviolet rays (UVA region and / or UVB region) that are harmful to the skin.

[0023] The emulsion cosmetic of the present disclosure may contain one type of composite powder A alone, or may contain two or more types.

[0024] The titanium oxide constituting the composite powder A is not particularly limited and may be titanium oxide of any crystalline type, such as anatase type, rutile type, brookite type, etc. From the viewpoint of improving the ultraviolet ray shielding ability, the crystalline type of titanium oxide is preferably rutile type. Titanium oxide may be surface-treated with an inorganic substance such as aluminum hydroxide, silicon oxide, or zirconium oxide, or may be surface-treated with a fatty acid such as stearic acid, isostearic acid, or lauric acid, or may be surface-treated with both an inorganic substance and a fatty acid. By surface-treating titanium oxide with an inorganic substance such as aluminum hydroxide, the titanium oxide can be inactivated. Furthermore, by surface-treating titanium oxide with a fatty acid such as stearic acid, the surface of titanium oxide can be made hydrophobic.

[0025] The average primary particle size of titanium oxide is, for example, preferably 1 nm to 90 nm, and more preferably 5 nm to 50 nm, from the viewpoint of improving the ultraviolet shielding ability and the appearance of the emulsion cosmetic. The average primary particle size of titanium oxide is determined by photographing 1,000 or more particles with a transmission electron microscope, processing the images of each particle with an image analysis particle size distribution analyzer, and measuring the equivalent circle diameter. When using a commercially available titanium oxide product, the average primary particle size listed in the catalog or the like can be used as is.

[0026] In composite powder A, the ultraviolet absorber composited with titanium oxide is 4-tert-butyl-4'-methoxydibenzoylmethane from the viewpoint of its ability to block ultraviolet rays in the UVA region or thereabouts. In the following description, 4-tert-butyl-4'-methoxydibenzoylmethane will be referred to as avobenzone, an alternative name for the compound, where appropriate.

[0027] The composite powder A preferably has a surface treatment layer containing avobenzone on the surface of the titanium oxide. The surface treatment layer is preferably present on the entire surface of the titanium oxide, but there may be areas where the surface treatment layer is not present. The bonding mode between the titanium oxide surface (when the titanium oxide is surface-treated with at least one of an inorganic substance and a fatty acid, the inorganic substance or fatty acid disposed on the surface) and avobenzone is not particularly limited as long as the titanium oxide and avobenzone behave as a single entity, and may be a chemical bond such as a covalent bond, or a non-chemical bond such as adsorption.

[0028] The presence of avobenzone on the surface of titanium oxide can be confirmed by measuring the reflectance spectrum of composite powder A.

[0029] There are no particular limitations on the ratio of titanium oxide to avobenzone in composite powder A. From the viewpoint of ultraviolet ray shielding ability, the ratio of titanium oxide to avobenzone in composite powder A can be, for example, 0.03 to 1 part by mass of avobenzone per 1 part by mass of titanium oxide.

[0030] The average particle size of the composite powder A is preferably less than 1 μm. If the average particle size of the composite powder A is less than 1 μm, coloring of the emulsion cosmetic by the composite powder A itself is suppressed, and so-called white cast is less likely to occur. From the viewpoints of UV shielding effect and usability, the average particle size of the composite powder A is more preferably 1 nm to 500 nm, and even more preferably 3 nm to 100 nm. The average particle size of the composite powder A can be measured by the same method as that for the average primary particle size of titanium oxide.

[0031] As the composite powder A, for example, the composite powder disclosed in International Publication No. 2010 / 098249 can be used. The composite powder A in the present disclosure is also available as a commercially available product. An example of a commercially available product of composite powder A is HXMT-100ZA from Teika Corporation. HXMT-100ZA is a titanium oxide surface-treated with aluminum hydroxide and stearic acid, on which a surface treatment layer containing 4-tert-butyl-4'-methoxydibenzoylmethane is formed.

[0032] The content of composite powder A in the emulsion cosmetic of the present disclosure is 31% by mass or less relative to the total mass of the emulsion cosmetic. In particular, from the viewpoint of achieving better UV blocking effect and better usability, the content of composite powder A is preferably 1% by mass to 21% by mass, and more preferably 3% by mass to 17% by mass, relative to the total mass of the emulsion cosmetic.

[0033] [Zinc oxide B] The emulsion cosmetic of the present disclosure contains zinc oxide B. Zinc oxide B can function as an ultraviolet ray scattering agent in emulsion cosmetics.

[0034] The zinc oxide B is preferably in the form of a powder. The average primary particle size of zinc oxide B is not particularly limited, but from the viewpoint of UV blocking effect and the appearance of the emulsion cosmetic, it is preferably 1 nm to 90 nm, and more preferably 5 nm to 50 nm. The average primary particle size of zinc oxide B can be measured in the same manner as the method for measuring the average primary particle size of titanium oxide described above. When a commercially available product is used as zinc oxide B, the average primary particle size listed in the catalog or the like can be applied as is.

[0035] The zinc oxide B may be zinc oxide in which at least a portion of the surface has been surface-treated. By using zinc oxide in which a portion or the entire surface has been surface-treated, zinc oxide B may be more compatible with the oil phase when it is contained in the oil phase of an emulsion cosmetic, for example. Examples of surface-treated zinc oxide B include zinc oxide surface-treated with a fatty acid, zinc oxide surface-treated with an alkylalkoxysilane, and the like.

[0036] The fatty acid used for the surface treatment of zinc oxide B is not particularly limited. For example, from the viewpoint of further improving the dispersion stability of zinc oxide B, a fatty acid having 10 to 22 carbon atoms is preferred, a fatty acid having 12 to 20 carbon atoms is more preferred, a fatty acid having 16 to 20 carbon atoms is even more preferred, and stearic acid and / or isostearic acid, which are fatty acids having 18 carbon atoms, are particularly preferred. The term "fatty acid" as used herein includes fatty acids and their salts. Examples of salts include Ca salts, Mg salts, Zn salts, and Al salts.

[0037] The surface treatment of zinc oxide B with a fatty acid can be carried out, for example, by mixing and stirring zinc oxide in a fatty acid for a certain period of time.

[0038] The alkylalkoxysilane used for the surface treatment of zinc oxide B is not particularly limited. The alkyl group in the alkylalkoxysilane is preferably an alkyl group having 6 to 18 carbon atoms (for example, a hexyl group, an octyl group, a decyl group, or an octadecyl group) from the viewpoint of dispersion stability. The alkoxy group in the alkylalkoxysilane is preferably an alkoxy group having 1 to 3 carbon atoms (for example, a methoxy group, an ethoxy group, or a propoxy group) from the viewpoint of further improving the dispersion stability of zinc oxide B, for example.

[0039] Specific examples of alkylalkoxysilanes used in the surface treatment of zinc oxide B include trimethoxyhexylsilane, trimethoxyoctylsilane, trimethoxydecylsilane, trimethoxyoctadecylsilane, triethoxyhexylsilane, triethoxyoctylsilane (cosmetic name: triethoxycaprylylsilane), triethoxydecylsilane, and triethoxyoctadecylsilane. Among these, triethoxyoctylsilane is more preferred as the alkylalkoxysilane used for the surface treatment of zinc oxide.

[0040] The surface treatment of zinc oxide B with alkylalkoxysilane can be carried out, for example, by mixing and stirring zinc oxide in alkylalkoxysilane for a certain period of time.

[0041] The emulsion cosmetic of the present disclosure may contain only one type of zinc oxide B, or may contain two or more types.

[0042] From the viewpoint of improving the UV blocking effect and the feel when used, the content of zinc oxide B in the emulsion cosmetic of the present disclosure is preferably 1% by mass to 20% by mass, and more preferably 3% by mass to 15% by mass, relative to the total mass of the emulsion cosmetic.

[0043] [UV absorber C other than composite powder A of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane] The emulsion cosmetic of the present disclosure contains an ultraviolet absorber C (hereinafter also referred to as "ultraviolet absorber C") other than the composite powder A of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane. The ultraviolet absorber C is preferably an organic compound that has the ability to absorb ultraviolet rays.

[0044] The ultraviolet absorber C contained in the emulsion cosmetic of the present disclosure may be an ultraviolet absorber that absorbs ultraviolet rays in the UVA region (i.e., wavelengths of 320 nm or more and 400 nm or less) (hereinafter also referred to as a UVA absorber), or an ultraviolet absorber that absorbs ultraviolet rays in the UVB region (i.e., wavelengths of 280 nm or more and less than 320 nm) (hereinafter also referred to as a UVB absorber), or may be an ultraviolet absorber that functions as both a UVA absorber and a UVB absorber.

[0045] The emulsion cosmetic may contain a single type of ultraviolet absorber C, or two or more types of ultraviolet absorbers C. When two or more types of other ultraviolet absorbers C are contained, a preferred combination includes, but is not limited to, one or more UVA absorbers and one or more UVB absorbers.

[0046] The emulsion cosmetic of the present disclosure may contain an organic UV absorber that can be used in the fields of quasi-drugs or cosmetics as UV absorber C. Examples of organic UV absorbers include those described in various known documents. For example, the group of compounds described in paragraphs 0018 and 0021 of Japanese Patent No. 6359947 can be used as the organic UV absorber contained in the emulsion cosmetic of the present disclosure.

[0047] Examples of organic ultraviolet absorbers include, but are not limited to, triazine compounds, benzoic acid compounds, anthranilic acid compounds, salicylic acid compounds, cinnamic acid compounds, benzotriazole compounds, dibenzoylmethane compounds, benzophenone compounds, benzimidazole compounds, benzoylpiperazine compounds, dibenzoylmethane compounds, benzoxazole compounds, phenylacrylate compounds, imidazoline compounds, camphor compounds, and benzalmalonate compounds.

[0048] The ultraviolet absorber C preferably contains ethylhexyl methoxycinnamate, which is a cinnamic acid compound, from the viewpoint of further improving the solubility of the ultraviolet absorber in the medium and the UVB blocking effect. From the viewpoint of improving the UVA blocking effect and the feeling of use, the composition may contain diethylaminohydroxybenzoylhexyl benzoate, which is a benzophenone-based ultraviolet absorber. The content of the ultraviolet absorber C is preferably 1% by mass to 20% by mass, and more preferably 3% by mass to 15% by mass, relative to the total mass of the emulsion cosmetic.

[0049] [Composite powder A of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane, and ultraviolet absorber F other than ultraviolet absorber C] The emulsion cosmetic of the present disclosure may further contain a composite powder A of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane, as well as an ultraviolet absorber F other than ultraviolet absorber C (hereinafter also referred to as "other ultraviolet absorber F"). From the viewpoint of improving the feeling of use, it is preferable that the other ultraviolet absorber F is contained in the aqueous medium E described below. As the other ultraviolet absorber F, Tinosorb M (BASF), which is an aqueous dispersion of methylene bis triazolyl tetramethyl butyl phenol, is preferred.

[0050] The ultraviolet absorber F contained in the emulsion cosmetic of the present disclosure may be an ultraviolet absorber that absorbs ultraviolet rays in the UVA region (i.e., wavelengths of 320 nm or more and 400 nm or less) (hereinafter also referred to as a UVA absorber), or an ultraviolet absorber that absorbs ultraviolet rays in the UVB region (i.e., wavelengths of 280 nm or more and less than 320 nm) (hereinafter also referred to as a UVB absorber), or may be an ultraviolet absorber that functions as both a UVA absorber and a UVB absorber.

[0051] When the emulsion cosmetic contains other ultraviolet absorbers F, the emulsion cosmetic may contain one type of other ultraviolet absorbers F alone, or two or more types of other ultraviolet absorbers F. When two or more types of other ultraviolet absorbers F are contained, a preferred combination includes, but is not limited to, a combination of one or more UVA absorbers and one or more UVB absorbers.

[0052] The content of the other ultraviolet absorber F is preferably 1% by mass to 20% by mass, and more preferably 3% by mass to 15% by mass, relative to the total mass of the emulsion cosmetic.

[0053] In the emulsion cosmetic of the present disclosure, the total content of ultraviolet absorbers, i.e., the total content of composite powder A, ultraviolet absorber C, and other ultraviolet absorber F, is preferably 1% by mass to 30% by mass, and more preferably 3% by mass to 15% by mass, from the viewpoint of achieving both ultraviolet shielding effect and usability.

[0054] [Silicone Oil D] The emulsion cosmetic of the present disclosure contains 20% by mass to 60% by mass of silicone oil D relative to the total mass of the emulsion cosmetic.

[0055] Examples of silicone oil D contained in emulsion cosmetics include linear or branched polysiloxanes such as trisiloxane, methyltrimethicone, dimethylpolysiloxane (dimethicone), methylphenylpolysiloxane, methylhydrogenpolysiloxane, and diphenylsiloxyphenyltrimethicone, cyclic polysiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, and tetramethyltetrahydrogencyclotetrasiloxane, and caprylyl methicone, etc. Among these, preferred silicone oil D is dimethylpolysiloxane (dimethicone) or decamethylcyclopentasiloxane.

[0056] Silicone oils are commercially available, and examples of commercially available silicone oil D in the present disclosure include KF-96L-0.65cs, KF-96L-1cs, KF-96L-1.5cs, KF-96L-2cs, KF-96L-5cs, KF-96A-6cs, KF-96-10cs, KF-96-20cs, KF-995, and KF-56A (all manufactured by Shin-Etsu Chemical Co., Ltd.), SH200 C Fluid 1CS, SH200 Fluid 1.5CS, SH200 C 2CS, SH200 C Fluid 5CS, SH200 C Fluid 6CS, SH200 C Fluid 10CS, SH200 C Fluid 20CS, 2-1184 Fluid, SH245 Fluid, DC246 Fluid, and DC345 Fluid, SS-3408 (all manufactured by Toray Dow Corning Co., Ltd.), TSF404, TSF405, TSF4045 (all manufactured by Momentive Performance Materials Co., Ltd.), etc.

[0057] The emulsion cosmetic of the present disclosure may contain only one type of silicone oil D, or may contain two or more types. The content of silicone oil D in the emulsion cosmetic of the present disclosure is 20% by mass to 60% by mass relative to the total mass, and from the perspective of improving the feel during use, it is more preferably 25% by mass to 35% by mass relative to the total mass of the emulsion cosmetic. When the content of silicone oil D in the water-in-oil cosmetic composition of the present disclosure is within the above range, the composition tends to have a good feel when used while still containing an amount of ultraviolet absorber that provides effective ultraviolet shielding effect.

[0058] [Aqueous medium E] The emulsion cosmetic of the present disclosure contains an aqueous medium E. Examples of the aqueous medium E include water, a mixture of water and a water-soluble monohydric alcohol such as ethanol, and a mixture of water and a water-soluble polyhydric alcohol such as glycerin. In the present disclosure, water-soluble refers to a substance that can be dissolved in pure water at a liquid temperature of 25°C at a rate of at least 0.1% by mass.

[0059] The water used in the aqueous medium E is not particularly limited, as long as it is water that can be used in cosmetics, for example. Specific examples of water include natural water, purified water, distilled water, ion-exchanged water, pure water, and ultrapure water (for example, Milli-Q water). As the water, for example, purified water, distilled water, ion-exchanged water, pure water, or ultrapure water is preferred from the viewpoint of having few impurities.

[0060] The water-soluble monohydric alcohol used in the aqueous medium E includes ethanol.

[0061] Examples of water-soluble polyhydric alcohols used in the aqueous medium E include glycerin, polyglycerin, ethylene glycol, propylene glycol, dipropylene glycol, 1,3-butylene glycol (also referred to as "BG"), 1,2-pentanediol, 1,2-hexanediol, polyethylene glycol, glucose, galactose, sucrose, sorbitol, maltitol, erythritol, xylitol, and trehalose. Of these, 1,3-butylene glycol is preferred from the viewpoint of improving the feel of the emulsion cosmetic when used. By including a polyhydric alcohol in the aqueous medium E, the moisturizing feeling of the emulsion cosmetic tends to be further improved, and the feel during use tends to be more favorable. When the aqueous medium E in the emulsion cosmetic of the present disclosure contains a polyhydric alcohol, it may contain only one type of polyhydric alcohol, or may contain two or more types of polyhydric alcohol.

[0062] The content of aqueous medium E in the emulsion cosmetic of the present disclosure is not particularly limited, but is, for example, preferably 10% by mass to 45% by mass, more preferably 15% by mass to 40% by mass, and even more preferably 20% by mass to 35% by mass, relative to the total mass of the emulsion cosmetic.

[0063] [Other ingredients] In addition to the composite powder A, zinc oxide B, ultraviolet absorber C, silicone oil D, and aqueous medium E, the emulsion cosmetic of the present disclosure may further contain other ingredients used in cosmetics for various purposes, as long as the effects are not impaired. Other ingredients include surfactants such as silicone surfactants, oils other than silicone oil D, silicone gels, organic or inorganic particles as feel adjusters, active ingredients to be included in the cosmetic product depending on the purpose, and additive ingredients such as coloring pigments (hereinafter simply referred to as "additive ingredients").

[0064] -Silicone surfactants- The emulsion cosmetic of the present disclosure may further contain a silicone surfactant. By further including a silicone surfactant in the emulsion cosmetic, the emulsion stability of the emulsion cosmetic becomes better.

[0065] The silicone surfactant is not particularly limited as long as it is used in the fields of pharmaceuticals, quasi-drugs, or cosmetics.

[0066] Examples of silicone surfactants include polyether-modified silicone surfactants, polyether-alkyl co-modified silicone surfactants, polyglycerin-modified silicone surfactants, and polyglycerin-alkyl co-modified silicone surfactants.

[0067] Specific examples of silicone surfactants include polyether-modified silicone surfactants such as PEG-10 dimethicone, PEG-3 dimethicone, PEG-12 dimethicone, PEG / PPG-19 / 19 dimethicone, polysilicone 13, and PEG-9 polydimethylsiloxyethyl dimethicone; Polyether-alkyl co-modified silicone surfactants such as methylpolysiloxane-cetylmethylpolysiloxane-poly(oxyethylene-oxypropylene)methylpolysiloxane copolymer, lauryl PEG-9 polydimethylsiloxyethyl dimethicone; Polyglycerin-modified silicone surfactants such as bisbutyldimethicone polyglyceryl-3, polyglyceryl-3 polydimethylsiloxyethyl dimethicone, and polyglyceryl-3 disiloxane dimethicone; and Examples include polyglycerin-alkyl co-modified silicone surfactants such as lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone.

[0068] Among the silicone surfactants described above, it is preferable to contain a polyether-modified silicone surfactant in which the silicone chain is branched, from the viewpoint of uniformity of the oil phase in the emulsified cosmetic of the present disclosure.

[0069] A polyether-modified silicone surfactant with a branched silicone chain refers to a polyether-modified silicone surfactant having a structure in which one or more siloxane bond chains branch off from the siloxane bond chain that constitutes the main chain of the polyether-modified silicone surfactant.

[0070] Examples of polyether-modified silicone surfactants with branched silicone chains include PEG-10 dimethicone, PEG-3 dimethicone, PEG-12 dimethicone, PEG / PPG-19 / 19 dimethicone, polysilicone 13, PEG-9 polydimethylsiloxyethyl dimethicone, methylpolysiloxane-cetylmethylpolysiloxane-poly(oxyethylene-oxypropylene)methylpolysiloxane copolymer, lauryl PEG-9 polydimethylsiloxyethyl dimethicone, bisbutyl dimethicone polyglyceryl-3, polyglyceryl-3 polydimethylsiloxyethyl dimethicone, polyglyceryl-3 disiloxane dimethicone, and lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone, with PEG-9 polydimethylsiloxyethyl dimethicone being preferred.

[0071] The silicone surfactant may be a commercially available product or a synthetic product. There is no particular limitation on commercially available silicone surfactants, and examples thereof include KF-6017 (Shin-Etsu Chemical Co., Ltd.), KF-6019 (Shin-Etsu Chemical Co., Ltd.), KF-6015 (Shin-Etsu Chemical Co., Ltd.), SH3772M (Dow Corning Toray Co., Ltd.), SH3775M (Dow Corning Toray Co., Ltd.), BY-11-030 (Dow Corning Toray Co., Ltd.), KF-6004 (Shin-Etsu Chemical Co., Ltd.), KF-6011 (Shin-Etsu Chemical Co., Ltd.), FZ-2222, FZ-2233, KF-6028 (Shin-Etsu Chemical Co., Ltd.), ABIL Examples of such acrylic resins include EM90 (manufactured by Goldschmidt), KF-6048 (Shin-Etsu Chemical Co., Ltd.), KF-6038 (Shin-Etsu Chemical Co., Ltd.), KF-6104, KF6106 (Shin-Etsu Chemical Co., Ltd.), KF-6100 (Shin-Etsu Chemical Co., Ltd.), and KF-6105 (Shin-Etsu Chemical Co., Ltd.).

[0072] When the emulsion cosmetic of the present disclosure contains a silicone surfactant, the emulsion cosmetic may contain one type of silicone surfactant alone, or two or more types of silicone surfactants.

[0073] From the viewpoint of uniformity of the oil phase, the content of the silicone surfactant is preferably 0.1% by mass or more, preferably 0.1 to 15% by mass, and more preferably 1.0 to 10% by mass, relative to the total mass of the emulsion cosmetic.

[0074] -Other surfactants- The emulsion cosmetic of the present disclosure may contain surfactants other than the silicone surfactants described above (also referred to as "other surfactants").

[0075] The other surfactant may be either an ionic surfactant or a nonionic surfactant. Ionic surfactants include, for example, alkyl sulfonates, alkyl sulfates, monoalkyl phosphates, and lecithin. Examples of nonionic surfactants include sorbitan fatty acid esters, glycerin fatty acid esters, organic acid monoglycerides, polyglycerin fatty acid esters, propylene glycol fatty acid esters, polyglycerin condensed ricinoleic acid esters, sucrose fatty acid esters, polyethylene glycol fatty acid esters, polyoxyethylene alkyl ethers, polyoxypropylene alkyl ethers, polyoxyethylene alkylphenyl ethers, polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitol fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyoxyethylene propylene glycol fatty acid esters, polyoxyethylene castor oil, and polyoxyethylene hydrogenated castor oil. As the other surfactant, sorbitan fatty acid esters are preferred from the viewpoint of emulsion stability.

[0076] When the water-in-oil cosmetic of the present disclosure contains other surfactants, it may contain only one type of other surfactant, or it may contain two or more types.

[0077] When the emulsion cosmetic of the present disclosure contains other surfactants, the content of the other surfactants in the emulsion cosmetic is not particularly limited. The content of the other surfactants is, for example, preferably 0.01% to 5% by mass, more preferably 0.05% to 3% by mass, and even more preferably 0.1% to 2% by mass, relative to the total mass of the emulsion cosmetic.

[0078] -Oils other than Silicone Oil D- The emulsion cosmetic of the present disclosure may contain oils other than silicone oil D (also referred to as other oils). When constituted as an emulsion, the oil is a component that serves as a solvent or dispersion medium in the composition that forms the oil phase. There are no particular limitations on the oil, as long as it is liquid at room temperature (25°C). Other oils include ester oils, hydrocarbon oils, and the like. The emulsion cosmetic may contain one type of other oil agent alone, or may contain two or more types.

[0079] Examples of ester oils include pentaerythrityl tetraethylhexanoate, cetyl ethylhexanoate, jojoba oil, di(phytosteryl / octyldodecyl) lauroyl glutamate, triisostearin, glyceryl diisostearate, triethylhexanoin, phytosteryl / behenyl dimer dilinoleate, phytosteryl / isostearyl / cetyl / stearyl / behenyl dimer dilinoleate, isopropyl palmitate, phytosteryl macadamiate, pentaerythrityl tetra(behenate / benzoate / ethylhexanoate), ethylhexyl palmitate, myristyl myristate, tripropylene glycol dipivalate, and isotridecyl isononanoate.

[0080] The hydrocarbon oil may be either linear or branched. Examples of the hydrocarbon oil include isoalkanes (isoparaffins) having 8 to 16 carbon atoms, such as isodecane, isododecane, and isohexadecane.

[0081] The content of oils in the emulsion cosmetic, as the total content of silicone oil D and other oils, is, for example, preferably 5% to 80% by mass, more preferably 10% to 80% by mass, and even more preferably 20% to 60% by mass, relative to the total mass of the emulsion cosmetic. When the emulsion cosmetic of the present disclosure is a water-in-oil emulsion cosmetic, it preferably contains 50% by mass or more of silicone oil D relative to the total mass of the oil phase excluding complex powder A. If the content of silicone oil D in the oil phase excluding complex powder A of the emulsion cosmetic is 50% by mass or more, the water resistance and feel (refreshing feeling) of the emulsion cosmetic tend to be improved. The total content of silicone oil D and other oils includes the oils contained together with the silicone gel when a commercially available silicone gel, described below, is used to produce the emulsified cosmetic of the present disclosure.

[0082] -Silicone gel- The emulsion cosmetic of the present disclosure may contain a silicone gel from the viewpoint of emulsion stability and the like. In the present disclosure, silicone gel refers to a cross-linked silicone material in which silicone chains forming the main chain skeleton are cross-linked with each other via polyether chains, polyglycerin chains, silicone chains, or the like. Depending on the chain structure used for crosslinking, there are various types, such as polyether-modified silicone gel, polyglycerin-modified silicone gel, polyether-alkyl co-modified silicone gel, and polyglycerin-alkyl co-modified silicone gel. These can be used without limitation in the emulsion cosmetic of the present disclosure.

[0083] Specific examples of silicone gels include dimethicone / PEG-10 / 15 crosspolymer, PEG-15 / lauryl dimethicone crosspolymer, PEG-10 / lauryl dimethicone crosspolymer, PEG-15 / lauryl polydimethylsiloxyethyl dimethicone crosspolymer, dimethicone / polyglycerin-3 crosspolymer, lauryl dimethicone / polyglycerin-3 crosspolymer, polyglyceryl-3 / lauryl polydimethylsiloxyethyl dimethicone crosspolymer, dimethicone / vinyl dimethicone crosspolymer, dimethicone / phenyl vinyl dimethicone crosspolymer, vinyl dimethicone / lauryl dimethicone crosspolymer, and lauryl polydimethylsiloxyethyl dimethicone / bis vinyl dimethicone crosspolymer.

[0084] Commercially available silicone gels include KSG-210, KSG-240, KSG-310, KSG-320, KSG-330, KSG-340, KSG-320Z, KSG-350Z, KSG-360Z, KSG-380Z, KSG-710, KSG-810, KSG-820, KSG-830, KSG-840, and KSG-820. Z, KSG-850Z, KSG-15, KSG-1510, KSG-16, KSG-1610, KSG-18A, KSG-19, KSG-016F, KSG-41A, KSG-42A, KSG-43A, KSG-44A, KSG-042Z, KSG-045Z, KSG-048Z (all manufactured by Shin-Etsu Chemical Co., Ltd.), and the like.

[0085] Among silicone gels, at least one selected from the group consisting of (dimethicone / (PEG-10 / 15) crosspolymer and (dimethicone / vinyl dimethicone) crosspolymer is preferred in terms of availability, swelling ability in oils such as silicone oil D, and emulsion stability, and it is more preferred to use a combination of (dimethicone / (PEG-10 / 15) crosspolymer and (dimethicone / vinyl dimethicone) crosspolymer.

[0086] When the emulsion cosmetic contains a silicone gel, the content of the silicone gel in the emulsion cosmetic is, for example, preferably 0.1% to 8% by mass, more preferably 0.25% to 4.5% by mass, and even more preferably 0.5% to 3% by mass, relative to the total mass of the emulsion cosmetic. The emulsion cosmetic may contain one type of silicone gel alone or two or more types. When two or more types of silicone gels are contained, the above content is the total content of the two or more types of silicone gels.

[0087] [Particles with a diameter of 5 μm to 50 μm] The emulsion cosmetic of the present disclosure preferably contains particles with a particle size of 5 μm to 50 μm. By containing particles with a particle size of 5 μm to 50 μm, stickiness on the surface to which the emulsion cosmetic is applied can be effectively suppressed. The particles may be inorganic particles or resin particles (organic particles).

[0088] In the present disclosure, the particle size of particles refers to the value obtained by photographing 1,000 or more particles with a transmission electron microscope, processing the images of each particle with an image analysis-type particle size distribution analyzer, and measuring the equivalent circle diameter. When using commercially available products, the average particle size listed in the catalog or the like can be used as is. The particle shape in a dry state may be spherical, plate-like, cubic, or the like, and particles that maintain such a clear three-dimensional structure can be suitably used as the specific particles.

[0089] The particle size is preferably 5 μm to 50 μm, more preferably 10 μm to 50 μm, and even more preferably 10 μm to 45 μm. When the particle size is 5 μm or more, the effect of suppressing stickiness is improved, and a good tactile feel tends to be obtained. Furthermore, when the particle size is 50 μm or less, particle detachment from the coating film of the emulsion cosmetic or significant protrusion, etc., is suppressed, and the tactile feel tends to be further improved.

[0090] The particles may be inorganic particles or resin particles, and whichever type of particles is used, a good tactile feel with reduced stickiness can be obtained on the surface to which the emulsion cosmetic is applied. On the other hand, from the viewpoint of obtaining a light feel when used, it is preferable that the particles be resin particles.

[0091] Examples of resin particles include particles containing resins or polymers such as nylon, polyethylene, polypropylene, melamine, polyphenylene sulfide, polyethersulfone, polyamideimide, polylactic acid, ethyl cellulose, dimethicone (siloxane), dimethiconol, vinyl dimethicone, silsesquioxane, polyethylene oxide, or crosspolymers thereof, acrylate crosspolymers, collagen, etc., and from the viewpoint of suppressing stickiness, particles containing acrylate crosspolymers are preferred.

[0092] In this disclosure, acrylate-based crosspolymer refers to a crosspolymer that includes structural units derived from acrylic acid esters and / or methacrylic acid esters.

[0093] Acrylate crosspolymers include methyl methacrylate crosspolymer, (methyl methacrylate / glycol dimethacrylate) crosspolymer, (butyl acrylate / glycol dimethacrylate) crosspolymer, (acrylic acid / VP) crosspolymer, (acrylic acid / phosphorylcholine glycol acrylate) crosspolymer, (sodium acrylate / acryloyldimethyltaurine / dimethylacrylamide) crosspolymer, (butyl acrylate / isopropylacrylamide / PEG-18 dimethacrylate) crosspolymer, (acrylates / alkyl acrylate (C10-30)) crosspolymer potassium, (acrylates / alkyl acrylate (C10-30)) crosspolymer sodium, (acrylates / ethylhexyl acrylate) crosspolymer Crosspolymer, (Acrylates / Ethylhexyl Acrylate / Glycidyl Methacrylate) Crosspolymer, (Acrylates / Vinyl Isodecanoate) Crosspolymer, (Acrylates / Vinyl Isodecanoate) Crosspolymer Sodium, (Acrylates / PEG-4 Dimethacrylate) Crosspolymer, (Acrylates / Vinyl Neodecanoate) Crosspolymer, (Acrylates / C12,13 Alkyl Methacrylate / Methoxyethyl Acrylate) Crosspolymer, (Acrylates / Steareth-20 Methacrylate) Crosspolymer, (Acrylates / Ceteareth-20 Methacrylate) Crosspolymer, (Acrylates / Trimethylsiloxypropyl Methacrylate) Crosspolymer, (Acrylates / Beheneth-25 Methacrylate) Crosspolymer Sodium, (Acrylates / MethoxyPEG-90 Methacrylate) Crosspolymer

[0094] Sodium Acryloyldimethyltaurate / VP Crosspolymer, Sodium Acryloyldimethyltaurate / PEG-8 Diacrylate Crosspolymer, Ammonium Acryloyldimethyltaurate / Carboxyethylammonium Acrylate Crosspolymer, Ammonium Acryloyldimethyltaurate / Steareth-25 Methacrylate Crosspolymer, Ammonium Acryloyldimethyltaurate / Beheneth-25 Methacrylate Crosspolymer, Hexylene Glycol Dimethacrylate / Glycol Dimethacrylate Crosspolymer, Styrene / Acrylates / Dimethicone Acrylate Crosspolymer, Styrene / Stearyl Methacrylate Crosspolymer, Polyurethane-24 / Methyl Methacrylate Crosspolymer, Diethylaminoethyl Methacrylate / HEMA / Perfluorohexylethyl Methacrylate Crosspolymer, Stearyl Methacrylate / Lauryl Methacrylate Crosspolymer, Methyl Methacrylate / PEG Methacrylate / PPG-4 / 3 Crosspolymer crosspolymer, (lauryl methacrylate / glycol dimethacrylate) crosspolymer, (lauryl methacrylate / sodium methacrylate) crosspolymer, sodium acrylate crosspolymer, lauryl acrylate crosspolymer, acrylate crosspolymer, acrylate crosspolymer-2-Na, acrylate crosspolymer-3, acrylate crosspolymer-4, acrylate polyacrylate crosspolymer-9-AMP, acrylate crosspolymer K, glycol dimethacrylate crosspolymer, polyacrylate-1 crosspolymer, polyacrylate-2 crosspolymer, polyacrylate crosspolymer-1-Na, polyacrylate crosspolymer-10, polyacrylate crosspolymer-11, polyacrylate crosspolymer-14, polyacrylate crosspolymer-3, polyacrylate crosspolymer-5, polyacrylate crosspolymer-6, allyl methacrylate crosspolymer, propyl methacrylate trimethicone crosspolymer, and the like.

[0095] Resin particles that contain the above-mentioned acrylate crosspolymer and are in particulate form can be suitably used as the resin particles in the present disclosure. In the above examples of acrylate crosspolymers, "VP" stands for "vinylpyrrolidone," "HEMA" stands for "hydroxyethyl methacrylate," and "AMP" stands for "aminomethylpropanol." The resin particles may contain only one type of acrylate crosspolymer, or may contain two or more types.

[0096] Examples of inorganic particles include silica particles, porous silica particles, zinc oxide, mica, kaolin, bentonite, calcium carbonate, and talc particles. Examples of silica particles include particles of silica, silica silylate, silica dimethyl silylate, and silica dimethicone silicate.

[0097] Commercially available particles that can be used as the feel-adjusting agent include Matsumoto Microsphere (registered trademark, hereinafter the same) S-100 (Matsumoto Yushi Pharmaceutical Co., Ltd., acrylate crosspolymer particles, 20 μm), Matsumoto Microsphere S-102 (Matsumoto Yushi Pharmaceutical Co., Ltd., acrylate crosspolymer particles, 20 μm), Matsumoto Microsphere M (Matsumoto Yushi Pharmaceutical Co., Ltd., acrylate crosspolymer particles, 15 μm), Matsumoto Microsphere M-305 (Matsumoto Yushi Pharmaceutical Co., Ltd., acrylate crosspolymer particles, 15 μm), Techpolymer ACX-1502C (Sekisui Plastics Co., Ltd., particle size 15 μm), Techpolymer ACX-2502 (Sekisui Plastics Co., Ltd.), and SILICA MICRO BEAD (Nikki Catalysts & Chemicals Co., Ltd., silica particles, particle size: 5 μm).

[0098] When the emulsion cosmetic contains particles, from the viewpoint of simultaneously achieving skin compatibility, stickiness suppression, and UV protection effects, the content of particles relative to the total mass of the emulsion cosmetic is preferably 0.5% by mass to 5.0% by mass, and more preferably 0.5% by mass to 4.0% by mass.

[0099] -Additional ingredients- Examples of additive components include functional components that exhibit useful beauty effects (moisturizing effect, whitening effect, skin conditioning effect, etc.) when used in cosmetics (so-called cosmetics and medicated cosmetics). Such functional ingredients include ascorbic acid derivatives such as L-ascorbyl palmitate and magnesium ascorbyl phosphate; carotenoids such as beta-carotene, astaxanthin, zeaxanthin, lycopene, and lutein; vitamin E such as tocopherol and tocotrienol; retinol derivatives such as retinol palmitate; ubiquinones such as coenzyme Q10; glycosphingolipids such as glucosylceramide and galactosylceramide; collagens such as hydrolyzed collagen and water-soluble collagen; amino acids such as acetylhydroxyproline; hydrolyzed white lupin protein; nicotinamide; Acacia extract; Belamcanda chinensis extract; Morus alba root bark extract; dipotassium glycyrrhizinate (also known as "glycyrrhizinate dipotassium"); and the like.

[0100] Other additive ingredients include fatty acids, lipophilic thickeners, water-soluble organic solvents (ethanol, etc.), preservatives (phenoxyethanol, methylparaben, etc.), pH adjusters (sodium hydroxide, potassium hydroxide, hydrochloric acid, etc.), emollients, moisturizers, antioxidants (sodium citrate, etc.), stabilizers (magnesium sulfate, etc.), colorants, fragrances, etc. These additional components may be such that one component performs two or more functions.

[0101] The emulsion cosmetic of the present disclosure may contain a color pigment. There are no particular limitations on the color pigment, and color pigments that can be used in cosmetics can be appropriately selected and used depending on the desired hue of the emulsion cosmetic. Examples of inorganic pigments include iron oxide (red) and iron oxide (yellow), and examples of organic dyes include commercially available products such as DK D&C RED No. 7 (manufactured by Daito Kasei Co., Ltd.). The type and content of the color pigment can be appropriately selected depending on the desired hue of the emulsion cosmetic.

[0102] When the emulsion cosmetic of the present disclosure contains other components, it may contain only one type of other component, or may contain two or more types.

[0103] When the emulsion cosmetic of the present disclosure contains other components, the content of the other components is not particularly limited and can be set appropriately depending on the purpose.

[0104] <Dosage form> The milk cosmetic of the present disclosure may be a water-in-oil emulsion cosmetic or an oil-in-water emulsion cosmetic. A water-in-oil emulsion cosmetic is preferred in that it has a better UV blocking effect and a better feeling when used. There are no particular limitations on the formulation of the emulsion cosmetic of the present disclosure, and examples include cream, emulsion, gel, stick, and the like.

[0105] <Application> The uses of the emulsion cosmetic of the present disclosure are not particularly limited. The emulsion cosmetic of the present disclosure can be preferably used as a skin care cosmetic, a sunscreen cosmetic, a makeup cosmetic (for example, a makeup base), and the like. In particular, the emulsion cosmetic of the present disclosure is suitable as a sunscreen cosmetic because it contains composite powder A and ultraviolet absorber C and has both a good ultraviolet shielding effect and a good feel when used.

[0106] <Method of manufacturing emulsion cosmetics> The method for producing the emulsion cosmetic of the present disclosure is not particularly limited. The emulsion cosmetic of the present disclosure can be produced according to known methods for producing emulsion cosmetics. Below, an example of a production method for the emulsion cosmetic of the present disclosure when it is a water-in-oil emulsion cosmetic will be described, but it goes without saying that the production method for the emulsion cosmetic of the present disclosure is not limited to the following.

[0107] When the emulsion cosmetic of the present disclosure is a water-in-oil emulsion cosmetic, it can be produced, for example, by mixing and stirring an oil phase composition containing an oil phase component and an aqueous phase composition containing an aqueous phase component. For example, when compounding composite powder A and zinc oxide B in an oil phase, an oil phase composition containing composite powder A, zinc oxide B, and other oil phase components (e.g., silicone oil D, a silicone surfactant, and other optional components) is prepared, and the resulting oil phase composition and aqueous phase composition are mixed to produce a water-in-oil emulsion cosmetic. The aqueous phase composition can be obtained, for example, by stirring and mixing an aqueous medium E containing water and ethanol with other aqueous phase components (for example, a polyhydric alcohol and other optional components). The emulsification method for mixing the oil phase composition and the aqueous phase composition to obtain a water-in-oil emulsion is not particularly limited, and can be carried out according to a conventional method.

[0108] When mixing the oil phase composition and the aqueous phase composition, the oil phase composition and the aqueous phase composition may be mixed at once, or one may be mixed by adding the other little by little. The mixing method is not particularly limited. The mixing method may be, for example, a method of mixing by stirring. For stirring, a general stirring tool or stirring device can be used.

[0109] The emulsification method is not particularly limited. The emulsification method may be, for example, a method in which the mixture is emulsified by stirring. A general emulsifying device can be used for the emulsification treatment by stirring. Examples of the emulsifying device include a homogenizer and a homomixer. The conditions for the emulsification treatment are not particularly limited and can be appropriately set depending on the type of emulsification apparatus, the composition and amount of the oil phase composition and the aqueous phase composition, and the like. The obtained emulsion cosmetic of the present disclosure has a good ultraviolet shielding effect and a good feeling when used, and can be suitably used as various cosmetics, particularly as sunscreen cosmetics. [Example]

[0110] The water-in-oil cosmetic composition of the present disclosure will be explained in more detail below using examples. However, the water-in-oil cosmetic composition of the present disclosure is not limited to the following examples as long as it does not deviate from the gist of the present disclosure. In the following examples, "%" means "% by mass" unless otherwise specified. The emulsion cosmetics of the following examples can all be suitably used as sunscreen cosmetics.

[0111] [Preparation of emulsified cosmetics] Example 1 An emulsion cosmetic was prepared as follows, according to the formulation shown in Table 1, so that the total amount of each component was 100% by mass.

[0112] (Preparation of Oil Phase Components) Ethylhexyl methoxycinnamate (trade name: Uvinul MC80N, manufactured by BASF; ultraviolet absorber C) and diethylaminohydroxybenzoylhexyl benzoate (trade name: Uvinul A Plus Granular, manufactured by BASF; ultraviolet absorber C) were heated to 80°C and dissolved. The resulting solution was thoroughly mixed with cyclopentasiloxane (trade name: KF-995, Shin-Etsu Chemical Co., Ltd.: Silicone Oil D), avobenzone complex titanium oxide (trade name: HXMT-100ZA, Teika Co., Ltd.: Composite Powder A), triethoxycaprylylsilane-treated zinc oxide (trade name: MZX-508OTS, average primary particle size: 25 nm, Teika Co., Ltd.: Zinc Oxide B), and PEG-9 polydimethylsiloxyethyl dimethicone (trade name: KF-6028, Shin-Etsu Chemical Co., Ltd.: Silicone surfactant) at room temperature (25°C; the same applies hereinafter) using a disper. Subsequently, dimethicone (trade name: KF-96A-5cs, Shin-Etsu Chemical Co., Ltd.: Silicone Oil D), dimethicone / vinyl dimethicone crosspolymer (trade name: KSG-16, Shin-Etsu Chemical Co., Ltd.), and dimethicone / PEG-10 / 15 crosspolymer (trade name: KSG-210, Shin-Etsu Chemical Co., Ltd.), butyl acrylate / glycol dimethacrylate crosspolymer (trade name: Matsumoto Microsphere S-100, particle size: 15 μm, Matsumoto Yushi Pharmaceutical Co., Ltd.), and sorbitan sesquioleate (trade name: NIKKOL SO-15V, Nikko Chemicals Co., Ltd.), diphenylsiloxyphenyl trimethicone (trade name: KF-56A, Shin-Etsu Chemical Co., Ltd.), tri(trimethylsiloxy)silylpropylcarbamate pullulan (trade name: TSP-30-D5, silicone-modified pullulan, Shin-Etsu Chemical Co., Ltd.), and the coloring pigments listed in Table 1 were further added, and the mixture was stirred and mixed at room temperature (25°C; the same applies hereinafter) to obtain a homogenous oil phase composition.

[0113] (Preparation of aqueous phase components) Purified water (aqueous medium E), methylenebisbenzotriazolyltetramethylbutylphenol (trade name: Tinosorb M, manufactured by BASF; other UV absorber F, aqueous dispersion), phenoxyethanol (preservative), 1,3-butylene glycol (polyhydric alcohol: aqueous medium E), and ethanol (monohydric alcohol: aqueous medium E) were mixed with magnesium sulfate and sodium citrate as pH adjusters, and functional ingredients such as dipotassium glycyrrhizinate, Averrhoa carambola leaf extract, Lagerstroemia indica (crape myrtle) and Centaurea cyanus flower extract, and antioxidant capsules (trade name: Smart Vector UV-CE (C00013, manufactured by BASF)), followed by the addition of fragrance. The mixture was homogenized by stirring at room temperature to obtain an aqueous phase composition.

[0114] (Preparation of Emulsion Cosmetics) Next, the oil phase composition and the aqueous phase composition were mixed according to a conventional method and stirred for 15 minutes at 3000 rpm using a homogenizer (trade name: HM-310, manufactured by AS ONE Corporation), to obtain the emulsified cosmetic preparation of Example 1.

[0115] [Examples 2 to 12, Comparative Examples 1 to 4] Emulsified cosmetics of Examples 2 to 12 and Comparative Examples 1 to 4 were obtained in the same manner as in Example 1, except that the components and amounts thereof were changed to those shown in Table 1 or Table 2 below. The total content of silicone oil D relative to the total amount of the emulsion cosmetic is shown in Tables 1 and 2.

[0116] [evaluation] 1. UV protection effect The SPF and PA values ​​of each emulsion cosmetic were calculated from the compositions of the composite powder A and ultraviolet absorber C contained in each of the emulsion cosmetics of Examples 1 to 12 and Comparative Examples 1 to 4 using an SPF simulator (Sunscreen Simulator) provided by BASF (https: / / sunscreensimulator.basf.com / Sunscreen_Simulator / ). The calculated SPF was ranked as follows: -SPF rating- a: 45 or above b: 35 or more and less than 45 c: 25 or more and less than 35 d: Less than 25

[0117] -PA rank- The calculated PA was ranked as follows: a: 18 years old or older b: 16 to under 18 c: 10 or more and less than 16 d: Less than 10

[0118] Since UV protection requires good SPF and PA, the UV protection effect of each emulsion cosmetic was evaluated using the following four-level evaluation criteria. -Standards for UV protection effectiveness- A: Both SPF and PA results are a B: Both SPF and PA results are b or higher (excluding cases where both results are a) C: Both SPF and PA results are c or higher (excluding both results being a or b) D: Either SPF or PA is d Evaluation criteria of "A", "B" and "C" are practically acceptable, with "A" and "B" being preferred and "A" being more preferred.

[0119] 2. Feeling of use The emulsion cosmetics prepared above in Examples 1 to 12 and Comparative Examples 1 to 4 were evaluated for feel during use.

[0120] 2-1. Elongation Ten expert evaluators applied the emulsion cosmetics to their faces with their fingers and evaluated the spread of the cosmetics on the skin during application using the following four-point scale. The scores of the 10 people were then averaged, with A being 4 points, B being 3 points, C being 2 points, and D being 1 point, and the average was rounded off to the nearest whole number to determine the corresponding evaluation rank as the growth evaluation result. The results are shown in Tables 1 and 2. Spreadability is one of the important aspects of the feel when applying a cosmetic to the face, and good spreadability when applied leads to a good feel when applied. Evaluation ranks of "A", "B" and "C" are practically acceptable, with "A" and "B" being preferred and "A" being more preferred. -standard- A: I feel that it stretches well. B: I feel a little good stretch. C: It spreads on the skin, but I don't feel it spreads well. D: I feel that the stretch is not good.

[0121] 2-2. Stickiness Ten expert evaluators applied the emulsion cosmetics to their faces with their fingers and then evaluated the stickiness after application using the following four-point scale. The evaluation scores of the 10 people were then averaged, with A: 4 points, B: 3 points, C: 2 points, and C: 1 point, and the evaluation rank corresponding to the average rounded to the nearest decimal place was used as the evaluation result for stickiness. The results are shown in Tables 1 and 2. Evaluation ranks of "A", "B" and "C" are practically acceptable, with "A" and "B" being preferred and "A" being more preferred. -standard- A: No stickiness B: Almost no stickiness C: A little sticky D: I feel a strong stickiness

[0122] In Tables 1 and 2, "%" in the column for each component means "% by mass." In Tables 1 and 2, "-" in the column for each component means that the component in that column is not contained. Details of each component listed in Tables 1 and 2 are as follows.

[0123] [Oil Phase Components] -Composite Powder A- Avobenzone composite titanium dioxide (product name: HXMT-100ZA, Teika Co., Ltd.) -Zinc Oxide B- Triethoxycaprylylsilane-treated zinc oxide (product name: MZX-508OTS, average primary particle size: 25 nm, Teika Corporation) -Ultraviolet absorber C- Ethylhexyl methoxycinnamate (Uvinul MC80N, BASF) Polysilicone-15 (Parsol SLX, DSM Nutrition) Diethylaminohydroxybenzoylhexyl benzoate (Uvinul A Plus Granular, BASF) -Silicone Oil D- Dimethicone (KF-96A-5cs, Shin-Etsu Chemical Co., Ltd.) Diphenylsiloxyphenyl trimethicone (KF-56A, Shin-Etsu Chemical Co., Ltd.) Cyclopentasiloxane (KF-995, Shin-Etsu Chemical Co., Ltd.) -Ester oil- Cetyl 2-ethylhexanoate (NIKKOL CIO, Nikko Chemicals Co., Ltd.) -Feel-adjusting agent- (Dimethicone / vinyl dimethicone) crosspolymer (KSG-16, Shin-Etsu Chemical Co., Ltd.) (Butyl acrylate / glycol dimethacrylate) crosspolymer (Matsumoto Microsphere S-100, particle size: 15 μm, Matsumoto Yushi Pharmaceutical Co., Ltd.) (Dimethicone / (PEG-10 / 15) Crosspolymer (KSG-210, Shin-Etsu Chemical Co., Ltd.) Tri(trimethylsiloxy)silylpropylcarbamate pullulan (TSP-30-D5, silicone-modified pullulan, Shin-Etsu Chemical Co., Ltd.) -Coloring pigments- Iron oxide (red) (SA / NAI-R10D5, Miyoshi Kasei Co., Ltd.) Iron oxide (yellow) (SA / NAI-Y10D5, Miyoshi Kasei Co., Ltd.) Organic dye (red) (DK D&C RED No. 7, Daito Chemical Industry Co., Ltd.) -Silicone surfactants- PEG-9 polydimethylsiloxyethyl dimethicone (KF-6028, Shin-Etsu Chemical Co., Ltd.) -Sorbitan fatty acid ester- Sorbitan sesquioleate (NIKKOL SO-15V, Nikko Chemicals Co., Ltd.)

[0124] [Aqueous phase component] -Aqueous medium E- Water (purified water) Monohydric alcohol (ethanol) Polyhydric alcohol (1,3-butylene glycol) -Other UV absorbers F- Methylenebisbenzotriazolyltetramethylbutylphenol (Tinosorb M, BASF) - pH adjuster - Magnesium sulfate Sodium citrate -Functional ingredients- Dipotassium glycyrrhizinate Carambola Leaf Extract (Starfruit Leaf Extract, Maruzen Pharmaceutical Co., Ltd.) Lagerstroemia indica extract (Yamakawa Trading Co., Ltd.) Centaurea flower extract (Centaurea extract BG-J, Maruzen Pharmaceutical Co., Ltd.) Antioxidant capsule (Smart Vector UV-CE (C00013), BASF) -Preservatives- Phenoxyethanol

[0125] [Table 1]

[0126] [Table 2]

[0127] The results shown in Tables 1 and 2 reveal that the emulsion cosmetics of the Examples all solve the problems of the present disclosure, have superior UV blocking effects compared to the emulsion cosmetics of the Comparative Examples, and provide a pleasant feel when used.

[0128] On the other hand, the emulsion cosmetic of Comparative Example 1, which did not contain the ultraviolet absorber C, did not provide a sufficient ultraviolet shielding effect. The emulsion cosmetic of Comparative Example 2, which did not contain UV absorber C and contained too much composite powder A, was inferior in feel when used, particularly in spreadability when applied to the skin. The emulsion cosmetic of Comparative Example 3, which did not contain ultraviolet absorber C and contained a higher amount of zinc oxide B relative to composite powder A, spread poorly when applied to the skin, while the emulsion cosmetic of Comparative Example 4, which did not contain zinc oxide B relative to composite powder A and contained only ultraviolet absorber C, was extremely sticky when applied to the skin.

Claims

1. a composite powder A of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane in an amount of 21% by mass or less relative to the total mass of the emulsion cosmetic; Zinc oxide B, an ultraviolet absorber C other than the composite powder A of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane; Silicone oil D in an amount of 20% by mass to 60% by mass relative to the total mass of the emulsion cosmetic; an aqueous medium E; An emulsified cosmetic comprising:

2. 2. The emulsion cosmetic according to claim 1, wherein the content of said composite powder A of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane is 1% by mass to 21% by mass relative to the total mass of the emulsion cosmetic.

3. 3. The emulsion cosmetic according to claim 1, wherein the content of the zinc oxide B is 1% by mass to 20% by mass relative to the total mass of the emulsion cosmetic.

4. 3. The emulsion cosmetic according to claim 1, wherein the content of the ultraviolet absorber C other than the composite powder A of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane is 1% by mass to 20% by mass relative to the total mass of the emulsion cosmetic.

5. 3. The emulsion cosmetic according to claim 1, wherein the ultraviolet absorber C other than the composite powder A of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane comprises ethylhexyl methoxycinnamate.

6. The emulsion cosmetic according to claim 1 or 2, further comprising a composite powder A of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane, and an ultraviolet absorber F other than the ultraviolet absorber C, wherein the ultraviolet absorber F is contained in the aqueous medium E.

7. The emulsion cosmetic according to claim 1, further comprising a silicone surfactant.

8. 3. The emulsion cosmetic according to claim 1, which is a sunscreen cosmetic.

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