Emulsified cosmetics

Abstract

To provide an emulsion cosmetic that is applied to skin and does not stick to the skin and spreads well and uniformly without unevenness, and yet exhibits superior pore covering power and cosmetic durability.SOLUTION: An emulsion cosmetic contains following components (A), (B), (C) and (D): (A) zinc oxide with an average particle size of 0.1-1 μm of 1-30 mass%, (B) silica with a specific surface area of 200 m2 / g or less of 1-20 mass%, (C) a nonionic surfactant, and (D) an oil component that is liquid at 25°C.SELECTED DRAWING: None

Description

[Technical Field]

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

[0002] Conventionally, in order to obtain cosmetics with excellent long-lasting makeup, cosmetics containing fine particle zinc oxide or trimethylsiloxysilicate have been investigated. For example, Patent Document 1 describes a water-in-oil emulsion cosmetic containing trimethylsiloxysilicate, a fluorine-modified silicone resin, finely divided zinc oxide, and spherical silica, and Patent Document 2 describes a water-in-oil emulsion cosmetic containing trimethylsiloxysilicate, a powder surface-treated with a fluorine compound, finely divided zinc oxide, and spherical silica. These emulsion cosmetics are excellent in that they prevent makeup from coming off and stickiness even after a long time has passed since application, and they provide a smooth feel when used. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-120662 [Patent Document 2] Japanese Patent Application Laid-Open No. 2015-120663 Summary of the Invention [Problem to be solved by the invention]

[0004] However, emulsion cosmetics containing fine particle zinc oxide have had problems such as sticking to the skin when applied, being prone to uneven application, and having an unpleasant feel to the touch. [Means for solving the problem]

[0005] The present inventors have discovered that by using a combination of zinc oxide with a specific particle size and silica with a small specific surface area, it is possible to obtain an emulsified cosmetic that does not stick to the skin when applied, spreads well, spreads evenly and is less likely to be uneven, and has excellent pore-covering power and makeup long-lasting effect.

[0006] The present invention relates to a composition comprising the following components (A), (B), (C) and (D): (A) 1 to 30 mass% of zinc oxide having a volume average particle size of 0.1 to 1 μm, (B) Specific surface area 200m 2 / g or less silica 1 to 20 mass %, (C) a nonionic surfactant, (D) Oil components that are liquid at 25°C The present invention relates to an emulsion cosmetic containing the above. [Effects of the Invention]

[0007] The emulsified cosmetic of the present invention has good adhesion to the skin, spreads well without sticking to the skin when applied, has excellent pore-covering power, spreads evenly and is less likely to be uneven, and has excellent cosmetic durability. DETAILED DESCRIPTION OF THE INVENTION

[0008] The zinc oxide component (A) used in the present invention has a volume average particle size of 0.1 to 1 μm, and from the viewpoints of achieving a natural finish, excellent pore covering power, and excellent cosmetic durability, the volume average particle size is preferably 0.1 to 0.9 μm, and more preferably 0.15 to 0.8 μm. In the present invention, the volume average particle size is a value measured using ethanol as a dispersion medium with a laser diffraction scattering particle size distribution analyzer (LMS-350, manufactured by Seishin Enterprise Co., Ltd.) The volume average particle size is the average particle size on a volume basis, and is the 50% median diameter.

[0009] In addition, zinc oxide (component (A)) has a specific surface area of ​​0.1 to 10 m, which provides a natural finish, pore coverage, and excellent makeup durability. 2 / g, and 0.5 to 9m 2 / g is more preferable, and 1 to 8m 2 / g is more preferred. In the present invention, the specific surface area is measured by the BET method (N2).

[0010] From the viewpoints of achieving a natural finish, excellent pore-covering power, and excellent makeup durability, the content of component (A) is 1% by mass or more, preferably 3% by mass or more, and more preferably 5% by mass or more, and 30% by mass or less, preferably 20% by mass or less, and more preferably 10% by mass or less, based on the total composition. The content of component (A) is 1 to 30% by mass, preferably 3 to 20% by mass, and more preferably 5 to 10% by mass, based on the total composition.

[0011] Component (B) silica has a specific surface area of ​​200m 2 / g or less, and has good adhesion to the skin, does not get caught on the skin when applied, and has excellent spreadability. 2 / g or less is preferable, and 120m 2 / g or less is more preferable, and 80m 2 / g or less is more preferred, and non-porous is even more preferred. Here, the specific surface area is measured in the same manner as for component (A).

[0012] Furthermore, the silica of component (B) is preferably spherical from the viewpoints of good adhesion to the skin and excellent spreadability without catching on the skin upon application. Here, spherical includes true spheres, nearly spherical, and spheroids, and may also be spherical powder with an uneven surface. The volume average particle size of the silica of component (B) is preferably 1 to 50 μm, more preferably 1 to 35 μm, even more preferably 2 to 25 μm, and even more preferably 3 to 15 μm, from the viewpoints of good adhesion to the skin and excellent spreadability without catching on the skin when applied. The volume average particle size is measured in the same manner as for component (A).

[0013] The silica of component (B) may be used as is, or may be subjected to a hydrophobic treatment by a conventional method before use. Examples of hydrophobic treatments include surface treatments such as fluorine compound treatment, silicone treatment, alkyl treatment, alkylsilane treatment, metal soap treatment, water-soluble polymer treatment, amino acid treatment, acylated amino acid treatment, lecithin treatment, organic titanate treatment, polyol treatment, acrylic resin treatment, methacrylic resin treatment, and urethane resin treatment. As the hydrophobic treatment, from the viewpoint of excellent adhesion to the skin, at least one or two or more hydrophobic treatments selected from silicone treatment, amino acid treatment, and acylated amino acid treatment are preferred, silicone treatment is more preferred, and dimethicone treatment is even more preferred.

[0014] From the viewpoints of achieving good adhesion to the skin and excellent spreadability without catching on the skin upon application, the content of component (B) is 1% by mass or more, preferably 1.5% by mass or more, and more preferably 2% by mass or more, and is 20% by mass or less, preferably 10% by mass or less, and more preferably 7% by mass or less, based on the total composition. The content of component (B) in the entire composition is 1 to 20 mass %, preferably 1.5 to 10 mass %, and more preferably 2 to 7 mass %.

[0015] In the present invention, from the viewpoints of good adhesion to the skin, good spreadability without catching on the skin upon application, excellent pore coverage, uniform spreadability that is less likely to be uneven, and excellent cosmetic durability, the mass ratio (A) / (B) of component (A) to component (B) is preferably 0.2 or more, more preferably 0.5 or more, even more preferably 0.8 or more, preferably 15 or less, more preferably 5 or less, and even more preferably 3 or less. Furthermore, the mass ratio (A) / (B) of component (A) to component (B) is preferably 0.2 to 15, more preferably 0.5 to 5, and even more preferably 0.8 to 3.

[0016] The nonionic surfactant of component (C) may be any surfactant commonly used in cosmetics, and examples thereof include sorbitan fatty acid esters such as sorbitan monoisostearate, sorbitan monooleate, sorbitan sesquistearate, and sorbitan sesquioleate; glycerin fatty acid esters, diglycerin fatty acid esters, propylene glycol fatty acid esters, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene hydrogenated castor oil fatty acid esters, polyethylene glycol fatty acid esters, alkyl glyceryl ethers, alkyl polyglyceryl ethers, polyoxyethylene alkyl ethers, polyoxyethylene alkyl ether fatty acid esters, polyoxyethylene alkylamines; polyether-modified silicones such as polyoxyethylene-methylpolysiloxane copolymers and poly(oxyethylene-oxypropylene)methylpolysiloxane copolymers; and silicone surfactants such as polyglycerin-modified silicones, alkyl-modified polyether-modified silicones, and alkyl chain-co-modified polyether-modified silicones. Of these, from the viewpoint of forming a uniform coating film, it is preferable to include one or more types selected from sorbitan fatty acid esters, diglycerin fatty acid esters, polyether-modified silicones, and polyglycerin-modified silicones, and it is more preferable to include one or more types selected from sorbitan fatty acid esters and polyether-modified silicones.

[0017] Furthermore, from the viewpoint of enhancing the dispersibility and solubility of water and water-soluble components in oil, the nonionic surfactant of component (C) is preferably a lipophilic nonionic surfactant, and preferably has an HLB value of 1 to 8, more preferably 2 to 7, and even more preferably 3 to 6. Here, HLB (Hydrophilic-Lipophilic Balance) indicates the molecular weight of the hydrophilic group portion relative to the total molecular weight of the surfactant, and is calculated using Griffin's equation. When a surfactant is composed of two or more nonionic surfactants, the HLB of the mixed surfactant is calculated as follows: The HLB of the mixed surfactant is the arithmetic average of the HLB values ​​of each nonionic surfactant based on their blending ratio. Mixed HLB=Σ(HLBx×Wx) / ΣWx HLBx indicates the HLB value of nonionic surfactant X. Wx represents the mass (g) of the nonionic surfactant X having the value of HLBx.

[0018] As the nonionic surfactant of component (C), commercially available products can be used. For example, sorbitan monoisostearate such as Span 120-LQ (HLB 4.7) (manufactured by Croda) can be used; polyoxyethylene-methylpolysiloxane copolymers such as KF-6015 (HLB 4.5), KF-6017 (HLB 4.5), KF-6028 (HLB 4) (all manufactured by Shin-Etsu Chemical Co., Ltd.) and SH3775M (HLB 5) (manufactured by Toray Dow Corning Co., Ltd.) can be used; poly(oxyethylene-oxypropylene)methylpolysiloxane copolymers such as KF-6012 (HLB 7) (manufactured by Shin-Etsu Chemical Co., Ltd.), DOWSIL BY 22-008 M (HLB 2), DOWSIL ES-5226 (HLB2) (manufactured by Dow Corning Toray Co., Ltd.), and alkyl-modified polyether-modified silicones such as KF-6038 (HLB3) (manufactured by Shin-Etsu Chemical Co., Ltd.) and ABIL EM 90 (HLB5) (manufactured by Evonik).

[0019] The nonionic surfactant of component (C) can be used alone or in combination with two or more species, and from the viewpoint of forming a uniform coating film, the content is preferably 0.1 mass% or more of the total composition, more preferably 1 mass% or more, even more preferably 2 mass% or more, and preferably 20 mass% or less, more preferably 10 mass% or less, and even more preferably 7 mass% or less. The content of component (C) is preferably 0.1 to 20 mass% of the total composition, more preferably 1 to 10 mass%, and even more preferably 2 to 7 mass%.

[0020] The component (D) used in the present invention is an oil component that is liquid at 25°C. Being liquid at 25°C means having fluidity at 25°C, and includes being in a paste state. The oil component of component (D) is one that is commonly used in cosmetics and may be either a non-volatile oil or a volatile oil as long as it is liquid at 25°C. Examples of non-volatile oils include linear or branched hydrocarbon oils such as liquid paraffin, liquid isoparaffin, squalane, and squalene; monoester oils such as ethylhexyl paramethoxycinnamate, octyldodecyl myristate, isotridecyl isononanoate, and isononyl isononanoate; diester oils such as neopentyl glycol dicaprate, propylene glycol dicaprate, and diisostearyl malate; triester oils such as glyceryl tri-2-ethylhexanoate and glyceryl tri(caprylate / caprate); tetraester oils such as dipentaerythrityl tetraisostearate; silicone oils such as dimethylpolysiloxane, caprylyl methicone, methylphenylpolysiloxane, diphenylsiloxyphenyl trimethicone, methylhydrogenpolysiloxane, and higher alcohol-modified organopolysiloxane; and fluorine oils such as fluoropolyethers and perfluoroalkyl ether silicones. Of these, from the viewpoint of excellent spreadability and not catching on the skin when applied, monoester oil, diester oil, triester oil, tetraester oil, and silicone oil are preferred, diester oil and silicone oil are more preferred, and diisostearyl malate, neopentyl glycol dicaprate, caprylyl methicone, and diphenylsiloxyphenyl trimethicone are preferred.

[0021] Examples of the volatile oil include silicone oil, hydrocarbon oil, and ether oil. Examples of volatile silicone oils include linear dimethylpolysiloxanes and cyclic dimethylpolysiloxanes. The linear dimethylpolysiloxanes may be either linear or branched. Examples of linear dimethylpolysiloxanes include dimethylpolysiloxane (1.5cs) and dimethylpolysiloxane (2cs). Examples of branched dimethylpolysiloxanes include methyltrimethicone, tris(trimethylsilyl)methylsilane, and tetrakis(trimethylsilyl)silane. Examples of cyclic dimethylpolysiloxanes include octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane. Examples of volatile hydrocarbons include isododecane, isotridecane, isohexadecane, light isoparaffin, and light liquid isoparaffin, and examples of volatile ether oils include ethyl perfluorobutyl ether. Of these, from the viewpoint of excellent adhesion to the skin, volatile silicone oils and volatile hydrocarbon oils are preferred, and among these, volatile silicone oils are more preferred, with dimethylpolysiloxane and methyltrimethicone being even more preferred.

[0022] One or more types of component (D) can be used, and from the viewpoint of excellent spreadability without sticking to the skin upon application, the content is preferably 2% by mass or more of the total composition, more preferably 5% by mass or more, even more preferably 10% by mass or more, and preferably 50% by mass or less, more preferably 40% by mass or less, and even more preferably 30% by mass or less. The content of component (D) is preferably 2 to 50% by mass of the total composition, more preferably 5 to 40% by mass, and even more preferably 10 to 30% by mass.

[0023] In the present invention, the mass ratio (B) / ((A)+(B)+(C)+(D)) of component (B) to the total amount of components (A), (B), (C), and (D) is preferably 0.02 or more, more preferably 0.03 or more, even more preferably 0.05 or more, and preferably 0.4 or less, more preferably 0.3 or less, and even more preferably 0.2 or less, from the viewpoints of good adhesion to the skin, good spreadability without catching on the skin upon application, excellent pore coverage, uniform spreadability that is less likely to be uneven, and excellent cosmetic lasting power. Furthermore, the mass ratio (B) / ((A)+(B)+(C)+(D)) of component (B) to the total amount of components (A), (B), (C), and (D) is preferably 0.02 to 0.4, more preferably 0.03 to 0.3, and even more preferably 0.05 to 0.2.

[0024] In the emulsion cosmetic of the present invention, from the viewpoint of maintaining the emulsion form and providing an excellent feel when used, the content of (E) water is preferably 10% by mass or more of the total composition, more preferably 20% by mass or more, even more preferably 30% by mass or more, and preferably 60% by mass or less, more preferably 55% by mass or less, and even more preferably 50% by mass or less. The content of component (E) is preferably 10 to 60% by mass of the total composition, more preferably 20 to 55% by mass, and even more preferably 30 to 50% by mass.

[0025] The emulsion cosmetic of the present invention may further contain a coloring pigment. The color pigments are those used in ordinary cosmetics, such as titanium oxide, zinc oxide, cerium oxide, aluminum oxide, yellow iron oxide, black iron oxide, red iron oxide, iron oxide red, iron blue, ultramarine blue, chromium oxide, chromium hydroxide, and other metal oxides, manganese violet, cobalt titanate, and other metal complexes, as well as inorganic pigments such as carbon black; Red No. 3, Red No. 104, Red No. 106, Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 2 Examples of the pigments to be treated include synthetic organic pigments such as Red No. 20, Red No. 226, Red No. 227, Red No. 228, Red No. 230, Red No. 401, Red No. 405, Red No. 505, Orange No. 203, Orange No. 204, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 401, Blue No. 1, and Blue No. 404; and natural organic pigments such as β-carotene, caramel, and paprika color, as well as composites of these colored pigments and composite pigments combining these colored pigments with pearl pigments. Examples of the pearl pigments to be treated include natural or synthetic inorganic powders such as mica, phlogopite, talc, silica, sericite, glass, kaolin, bismuth oxychloride, cerium oxide, calcium sulfate, barium sulfate, magnesium sulfate, and plate-like alumina powder. Specific examples of composite pigments include titanium oxide-coated mica, iron oxide-coated mica, iron oxide-coated mica titanium, iron oxide-coated synthetic phlogopite, chromium oxide-coated mica titanium, titanium oxide-coated glass powder, iron oxide-coated glass powder, titanium oxide-containing glass powder, and iron oxide-containing glass powder. Of these, metal oxides are preferred, and it is more preferred to include at least one or two or more selected from titanium oxide, zinc oxide, yellow iron oxide, black iron oxide, and red iron oxide, and it is even more preferred to include at least one or two or more selected from titanium oxide, yellow iron oxide, black iron oxide, and red iron oxide.

[0026] These color pigments can be used as they are, or can be used after being subjected to a hydrophobic treatment, similar to component (B).

[0027] One or more color pigments can be used, and the content thereof is preferably 1 to 30 mass % of the total composition, more preferably 3 to 25 mass %, even more preferably 5 to 20 mass %, and even more preferably 7 to 15 mass %, from the viewpoint of achieving a beautiful makeup effect on the skin.

[0028] The emulsion cosmetic of the present invention may further contain an extender pigment. Examples of extender pigments include those commonly used in cosmetics, such as magnesium silicate, aluminum silicate, talc, sericite, mica, synthetic fluorphlogopite, glass powder, phlogopite, kaolin, clay, bentonite, hectorite, zeolite, bismuth oxychloride, zirconium oxide, magnesium oxide, aluminum oxide, calcium sulfate, barium sulfate, magnesium sulfate, calcium carbonate, magnesium carbonate, and other inorganic extender pigments, as well as composite powders of these.

[0029] One or more extender pigments can be used, and the content is preferably 1 to 20 mass % of the total composition, more preferably 2 to 15 mass %, and even more preferably 3 to 8 mass %, from the viewpoint of excellent usability and finish.

[0030] In addition to the above-mentioned components, the emulsion cosmetic of the present invention may contain components that are commonly used in cosmetics, such as powders other than those mentioned above, polymeric compounds, antioxidants, fragrances, preservatives, pH adjusters, blood circulation promoters, cooling agents, antiperspirants, disinfectants, skin activators, moisturizers, and refreshing agents. From the viewpoints of being environmentally friendly and providing an excellent feel when used, the emulsion cosmetic of the present invention preferably contains no more than 1% by mass of organic resin powder in the total composition, more preferably no more than 0.1% by mass, and even more preferably is substantially free of organic resin powder. The content of spherical organic resin powder in the total composition is preferably 1% by mass or less, more preferably 0.1% by mass or less, and even more preferably substantially zero. Examples of organic resin powders include crosslinked or non-crosslinked organic resin powders such as powders of one or more polymers or copolymers selected from polyamide resin, nylon resin, polyester resin, polyethylene resin, polytetrafluoroethylene resin, polypropylene resin, polystyrene resin, benzoguanamine resin, polymethylbenzoguanamine resin, polyurethane resin, vinyl resin, fluororesin, acrylic resin, and melamine resin; butyl acrylate-vinyl acetate copolymer, styrene-acrylic acid copolymer, silicone resin, and divinylbenzene-styrene copolymer.

[0031] The emulsified cosmetic of the present invention can be produced by a conventional method and can be made into a dosage form such as a liquid, emulsion, paste, cream, gel, or solid.

[0032] The emulsion cosmetic of the present invention may be either a water-in-oil emulsion cosmetic or an oil-in-water emulsion cosmetic, and is preferably a water-in-oil emulsion cosmetic. Furthermore, the emulsion cosmetic of the present invention can be used, for example, as makeup cosmetics such as a makeup base, foundation, concealer, blusher, eye shadow, mascara, eyeliner, eyebrow cream, overcoat agent, and lipstick; and as ultraviolet protection cosmetics such as a sunscreen emulsion and sunscreen cream, and is therefore suitable as a makeup cosmetic. [Example]

[0033] Examples 1 to 7 and Comparative Examples 1 to 3 Water-in-oil emulsion cosmetics (liquid foundations) were prepared with the compositions shown in Table 1, and evaluated for spreadability, pore coverage, uniform spreadability, and makeup durability. The results are also shown in Table 1.

[0034] (Manufacturing method) The powder phase components containing components (A) and (B) were mixed and pulverized, added to a separately mixed oil phase component containing components (C) and (D), and dispersed using a disperser. The aqueous phase components were then added, dispersed using a disperser, and stirred using a homomixer to obtain each water-in-oil emulsion cosmetic (liquid foundation).

[0035] (Evaluation method) (1) Good stretchability: Three expert panelists evaluated the spreadability of each water-in-oil emulsion cosmetic (foundation) when applied to the skin, using the following criteria. The results were expressed as the total score of the three panelists. 5: Very stretchy. 4;Good stretch. 3: Slightly stretchy. 2: Not very stretchy. 1: Not stretchy.

[0036] (2) Pore coverage: Three expert panelists evaluated the pore-covering power of each water-in-oil emulsion cosmetic (foundation) after applying it to the skin, using the following criteria. The results are shown as the total score of the three panelists. 5. Pores are much less noticeable. 4. Pores are less noticeable. 3;Pores are less noticeable. 2: Pores are noticeable. 1: Pores are very noticeable.

[0037] (3) Uniform elongation: Three expert panelists applied each water-in-oil emulsion cosmetic (foundation) to the skin and performed a sensory evaluation of the uniformity of spread (non-uniformity) according to the following criteria. The results were expressed as the total score of the three panelists. 5. Spreads quite evenly on the skin. 4. Spreads evenly on the skin. 3. Spreads evenly on the skin. 2: It doesn't spread very evenly on the skin. 1. It doesn't spread evenly on the skin.

[0038] (4) Makeup durability: Three expert panelists performed a sensory evaluation of the makeup durability after applying each water-in-oil emulsion cosmetic (foundation) to the skin, using the following criteria. The results were expressed as the total score of the three panelists. 5. Makeup lasts quite well. 4. Makeup lasts well. 3: Makeup lasts fairly well. 2: The makeup doesn't last very long. 1: The makeup doesn't last long.

[0039] [Table 1]

Claims

1. The following components (A), (B), (C), and (D): (A) 1 to 30 mass% of zinc oxide having an average particle size of 0.1 to 1 μm, (B) Specific surface area 200m 2 / g or less silica 1 to 20 mass %, (C) one or more nonionic surfactants selected from sorbitan fatty acid esters and polyether-modified silicones; (D) Oil component that is liquid at 25°C Contains An emulsion cosmetic in which the mass ratio (A) / (B) of component (A) to component (B) is 0.2 to 15.

2. 2. The emulsion cosmetic according to claim 1, wherein the content of component (C) is 0.1 to 20% by mass.

3. 3. The emulsion cosmetic according to claim 1, wherein the content of component (D) is 2 to 50% by mass.

4. The emulsion cosmetic according to any one of claims 1 to 3, wherein the HLB value of component (C) is 1 to 8.

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