Powdered cosmetics

Abstract

To provide powder cosmetics that give a natural finish and can properly cover skin irregularities.SOLUTION: Powder cosmetics comprise following components (A), (B) and (C): (A) 0.1-25 mass% of zinc oxide with a volume average particle size of 0.1-1 μm, (B) powder selected from silica, corn starch and cellulose, with a volume average particle size of 2-20 μm, and (C) talc of 20-90 mass%.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to powdered cosmetics.

Background Art

[0002] Conventionally, in order to obtain a natural finish and a smooth feel, powdered cosmetics containing fine particle zinc oxide have been studied. For example, Patent Document 1 describes that a powdered cosmetic containing fine particle titanium oxide, hydrophobic iron oxide-coated titanium oxide, boron nitride, and a liquid oil agent can suppress uneven coating during application and obtain a natural finish with an adhesive feeling. Also, Patent Document 2 describes that a powdered cosmetic containing fine particle titanium oxide or a composite thereof and a polymer spherical elastic powder has a skin care effect and an excellent feel in use.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] Conventional powdered cosmetics containing fine particle zinc oxide have had a problem that they cannot achieve both the skin unevenness covering power and a natural finish.

Means for Solving the Problems

[0005] The present inventor has found that by using a combination of zinc oxide having a specific particle size, a powder having a specific particle size selected from silica, corn starch, and cellulose, and further talc, a powdered cosmetic having a natural finish and excellent skin unevenness covering power can be obtained.

[0006] The present invention comprises the following components (A), (B), and (C): (A) Zinc oxide with a volume-average particle size of 0.1 to 1 μm, 0.1 to 25% by mass. (B) A powder selected from silica, corn starch, and cellulose, with a volume-average particle size of 2 to 20 μm. (C) Talc 20-90% by mass This relates to powdered cosmetic products containing [a specific ingredient]. [Effects of the Invention]

[0007] The powder cosmetic of the present invention does not leave a white cast after application, provides a natural finish, and offers excellent coverage of skin imperfections. Furthermore, it spreads smoothly during application. [Modes for carrying out the invention]

[0008] The zinc oxide component (A) used in this invention has a volume average particle size of 0.1 to 1 μm. From the viewpoint of achieving a natural finish and excellent coverage of skin irregularities, a volume average particle size of 0.1 to 0.9 μm is preferred, and 0.15 to 0.8 μm is more preferred. In this invention, the volume-average particle size is the value measured using a laser diffraction scattering particle size analyzer (LMS-350, manufactured by Seishin Corporation) with ethanol as the dispersion medium. The volume-average particle size is the average particle diameter based on volume, and is defined as the 50% median diameter.

[0009] Furthermore, zinc oxide (A), an ingredient in this product, provides a natural finish and excellent coverage of skin imperfections, with a specific surface area of ​​0.1 to 13 m². 2 It is preferable that the amount is / g, and 0.5 to 12m 2 / g is more preferable, 1 to 11m 2 / g is even more preferable. In this invention, the specific surface area is measured by the BET method (N2).

[0010] The content of component (A) is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, more preferably 1% by mass or more, 25% by mass or less, more preferably 20% by mass or less, and more preferably 15% by mass or less, from the viewpoint of suppressing white cast after application, providing a natural finish, excellent coverage of skin irregularities, and excellent smooth spreadability during application. Furthermore, the content of component (A) is preferably 0.1 to 25% by mass, more preferably 0.5 to 20% by mass, and more preferably 1 to 15% by mass, from the viewpoint of suppressing white cast after application, providing a natural finish, excellent coverage of skin irregularities, and excellent smooth spreadability during application.

[0011] Component (B) is a powder with a volume-average particle size of 2 to 20 μm, selected from silica, corn starch, and cellulose. The volume-average particle size of these powders is preferably 3 to 15 μm, and more preferably 4 to 12 μm, from the viewpoint of suppressing white cast after application, providing a natural finish, excellent coverage of skin irregularities, and excellent smooth spreadability during application. The volume-average particle size is measured in the same way as component (A).

[0012] Of the powders in component (B), silica is chosen because it suppresses white cast after application, provides a natural finish, offers excellent coverage of skin imperfections, and spreads smoothly during application, resulting in a specific surface area of ​​200 m². 2 It is preferable that the amount is less than or equal to / g, and 150m 2 Preferably less than / g, 120m 2 More preferably less than / g, 75m 2 It is even more preferable that the amount be less than / g, and even more preferable that it be non-porous. The specific surface area is measured in the same way as component (A).

[0013] The powder of component (B) can be used as is, or it can be used after being hydrophobized using a conventional method. 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, methacrylate resin treatment, and urethane resin treatment. As the hydrophobization treatment, from the viewpoint of excellent adhesion to the skin, hydrophobization treatment with at least one or two or more selected from silicone treatment, amino acid treatment, acylated amino acid treatment, and metallic soap treatment is preferable, silicone treatment is more preferable, and dimethicone treatment is even more preferable.

[0014] Component (B) can be used in combination of one or two or more, and the content is preferably 0.5% by mass or more in the total composition, more preferably 1% by mass or more, even more preferably 2% by mass or more, preferably 20% by mass or less, more preferably 15% by mass or less, and even more preferably 10% by mass or less from the viewpoints of suppressing white bloom after coating, achieving a natural finish, having excellent skin unevenness covering power, and having excellent smooth elongation during coating. Also, the content of component (B) is preferably 0.5 to 20% by mass in the total composition, more preferably 1 to 15% by mass, and even more preferably 2 to 10% by mass.

[0015] In the present invention, the mass ratio (A) / (B) of component (A) to component (B) is preferably 0.05 or more, more preferably 0.1 or more, even more preferably 0.15 or more, preferably 10 or less, more preferably 5 or less, and even more preferably 3 or less from the viewpoints of suppressing white bloom after coating, achieving a natural finish, having excellent skin unevenness covering power, and having excellent smooth elongation during coating. Also, the mass ratio (A) / (B) of component (A) to component (B) is preferably 0.05 to 10, more preferably 0.1 to 5, and even more preferably 0.15 to 3.

[0016] The talc of component (C) may be any as long as it is used in ordinary cosmetics, and from the viewpoints of suppressing white bloom after coating, achieving a natural finish, having excellent skin unevenness covering power, and having excellent smooth elongation during coating, the volume average particle diameter is preferably 1 to 30 μm, more preferably 2 to 20 μm, and even more preferably 3 to 14 μm.

[0017] The content of talc as component (C) is 15% by mass or more in the total composition, preferably 30% by mass or more, more preferably 50% by mass or more, 90% by mass or less, more preferably 85% by mass or less, and even more preferably 80% by mass or less, from the viewpoints of suppressing whitening after application, achieving a natural finish, having excellent skin unevenness covering power, and having excellent smooth elongation during application. Also, the content of component (C) is 15 to 90% by mass in the total composition, more preferably 30 to 85% by mass, and even more preferably 50 to 80% by mass.

[0018] In the present invention, the mass ratio (C) / (A) of component (C) to component (A) is preferably 1 or more, more preferably 1.6 or more, even more preferably 3.5 or more, preferably 150 or less, more preferably 120 or less, and even more preferably 80 or less, from the viewpoints of suppressing whitening after application, achieving a natural finish, having excellent skin unevenness covering power, and having excellent smooth elongation during application. Also, the mass ratio (C) / (A) of component (C) to component (A) is preferably 1 to 150, more preferably 1.6 to 120, and even more preferably 3.5 to 80.

[0019] In the present invention, the mass ratio ((A)+(B)) / (C) of the total amount of components (A) and (B) to component (C) is preferably 0.01 or more, more preferably 0.02 or more, even more preferably 0.04 or more, preferably 2 or less, more preferably 1.1 or less, and even more preferably 0.4 or less, from the viewpoints of suppressing whitening after application, achieving a natural finish, having excellent skin unevenness covering power, and having excellent smooth elongation during application. Also, the mass ratio ((A)+(B)) / (C) of the total amount of components (A) and (B) to component (C) is preferably 0.01 to 2, more preferably 0.02 to 1.1 or less, and even more preferably 0.04 to 0.4.

[0020] [[ID=1P2]]The powdered cosmetic of the present invention can further contain (D) an oil component that is liquid at 25°C. Being liquid at 25°C means having fluidity at 25°C and includes paste-like states. The oil component of component (D) can be either a non-volatile oil or a volatile oil, as long as it is used in ordinary cosmetics and is liquid at 25°C, with non-volatile oils being preferred. Examples of non-volatile oils include linear or branched hydrocarbon oils such as petrolatum, hydrogenated polydecene, liquid paraffin, liquid isoparaffin, squalane, and squalene; monoester oils such as ethylhexyl paramethoxycinnamate, isocetyl myristate, octyldodecyl myristate, isotridecyl isononanoate, and isononyl isononanoate; diester oils such as neopentyl glycol dicaprate, propylene glycol dicaprate, and diisostearyl malate; triethylhexanoin, glyceryl tri-2-ethylhexanoate, caprylic / capric triglyceride, olive oil, jojoba oil, and macadamia oil. Examples include triester oils such as tsut oil, meadowfoam oil, castor oil, safflower oil, sunflower oil, avocado oil, canola oil, apricot kernel oil, rice germ oil, and rice bran oil; tetraester oils such as dipentaerythrityl tetraisostearate; silicone oils such as phytosteryl / octyldodecyl lauroyl glutamate, dimethylpolysiloxane, caprylyl methicone, methylphenylpolysiloxane, diphenylsiloxyphenyl trimethicone, methylhydrogenpolysiloxane, and higher alcohol-modified organopolysiloxane; and fluorine oils such as fluoropolyethers and perfluoroalkyl ether silicones. Of these, petrolatum, hydrogenated polydecene, isocetyl myristate, isononyl isononanoate, triethylhexanoin, caprylic / capric triglyceride, phytosteryl / octyldodecyl lauroyl glutamate, and dimethylpolysiloxane are preferred from the viewpoint of suppressing white cast after application, providing a natural finish, excellent coverage of skin irregularities, and excellent smooth application. Petrolatum, hydrogenated polydecene, isononyl isononanoate, and triethylhexanoin are more preferred.

[0021] Component (D) can be one or more types, and its content is preferably 0.5% by mass or more, more preferably 1% by mass or more, even more preferably 2% by mass or more, preferably 20% by mass or less, more preferably 14% by mass or less, and even more preferably 7% by mass or less, from the viewpoint of suppressing white cast after application, providing a natural finish, excellent coverage of skin irregularities, and excellent smooth spreadability during application. Furthermore, the content of component (D) is preferably 0.5 to 20% by mass, more preferably 1 to 14% by mass, and even more preferably 2 to 7% by mass, from the total composition.

[0022] The powder cosmetic composition of the present invention may further contain coloring pigments other than component (A). Examples of coloring pigments include those commonly used in cosmetics, such as metal oxides like titanium dioxide, cerium oxide, aluminum oxide, iron oxide, Prussian blue, ultramarine blue, chromium oxide, and chromium hydroxide; metal complexes like manganese violet and cobalt titanate; and inorganic pigments such as carbon black; synthetic organic pigments such as Red No. 3, Red No. 104, Red No. 106, Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 227, Red No. 228, Red No. 230, Red No. 401, Red No. 405, 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 pigment. Examples also include complexes of these coloring pigments and composite pigments that combine these coloring pigments with pearl pigments. Examples of pearl pigments that can be processed 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-shaped alumina powder. Specific examples of composite pigments include titanium oxide-coated mica, iron oxide-coated mica, iron oxide-coated titanium mica, barium sulfate-coated titanium mica, iron oxide-coated synthetic phlogopite, chromium oxide-coated titanium mica, titanium oxide-coated glass powder, iron oxide-coated glass powder, titanium oxide-encapsulated glass powder, and iron oxide-encapsulated glass powder. Of these, metal oxides are preferred, more preferably containing at least one or more selected from titanium oxide and iron oxide, and even more preferably containing at least one or more selected from titanium oxide, yellow iron oxide, black iron oxide, and red iron oxide.

[0023] These coloring pigments can be used as is, or, like component (B), they can be hydrophobized before use.

[0024] One or more coloring pigments may be used, and from the viewpoint of achieving a natural and beautiful makeup effect on the skin, the content is preferably 0 to 15% by mass, more preferably 0 to 8% by mass, and even more preferably 0 to 3% by mass.

[0025] The powder cosmetic composition of the present invention may further contain extender pigments other than components (B) and (C). Examples of extender pigments include those commonly used in cosmetics, such as inorganic extender pigments and composite powders thereof, including magnesium silicate, aluminum silicate, sericite, mica, synthetic fluorophlogopite, glass powder, fluorphlogopite, kaolin, clay, bentonite, hectorite, zeolite, zinc stearate, bismuth oxychloride, zirconium oxide, magnesium oxide, aluminum oxide, calcium sulfate, barium sulfate, magnesium sulfate, calcium carbonate, magnesium carbonate, boron nitride, etc. As the extender pigment, a plate-shaped powder is preferred.

[0026] Extender pigments other than components (B) and (C) may be used in one or more forms. From the viewpoint of excellent feel and finish, the content is preferably 2 to 50% by mass of the total composition, more preferably 5 to 45% by mass, and even more preferably 8 to 18% by mass.

[0027] In addition to the above-mentioned components, the powder cosmetic composition of the present invention may contain components commonly used in cosmetics, such as other powders, other oil components, surfactants, polymer compounds, antioxidants, fragrances, preservatives, thickeners, pH adjusters, blood circulation promoters, cooling agents, antiperspirants, bactericides, skin activators, UV absorbers, moisturizers, cooling agents, etc.

[0028] From the viewpoint of being environmentally friendly and having excellent usability, the powder cosmetic composition of the present invention preferably contains 1% by mass or less of organic resin powder in the total composition, more preferably 0.1% by mass or less, and even more preferably substantially no organic resin powder. Furthermore, the content of spherical organic resin powder is preferably 1% by mass or less in the total composition, more preferably 0.1% by mass or less, and even more preferably substantially absent. 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, melamine resin; butyl acrylate / vinyl acetate copolymer, styrene / acrylic acid copolymer, silicone resin, and divinylbenzene / styrene copolymer.

[0029] The powdered cosmetic composition of the present invention can be manufactured according to conventional methods. The powder cosmetic of the present invention can be in the form of a solid powder cosmetic. For example, a solid powder cosmetic can be obtained by mixing and grinding all the powder phase components, including components (A), (B), and (C), then adding and mixing the oil phase component, including component (D), further grinding the resulting mixture with a grinder, filling the pulverized material into a container, and molding it at a molding pressure of 1000 to 2500 kgf.

[0030] The powdered cosmetic composition of the present invention can be used, for example, as a makeup cosmetic such as face powder, powder foundation, blush, or eyeshadow. The powder cosmetic composition of the present invention is suitable as a solid powder cosmetic composition. [Examples]

[0031] Examples 1-14 and Comparative Examples 1-2 Solid powder cosmetics (face powders) with the compositions shown in Table 1 were manufactured and evaluated for non-white cast, natural finish, coverage of skin imperfections, and smooth spreadability. The results are also shown in Table 1.

[0032] (Manufacturing method) After mixing and grinding all the powder components, including components (A), (B), and (C), an oil was added and mixed, and the resulting mixture was further ground in a grinder. The ground material was filled into a container and molded at a molding pressure of 1000 to 2500 kgf to obtain a solid powder cosmetic (face powder).

[0033] (Evaluation method) (1) No white cast: Five expert panelists sensory-evaluated each powdered / solid cosmetic (face powder) when applied to the skin using a puff, assessing the degree of white cast according to the following criteria. The results are shown as the average score of the five panelists. 5; I don't notice any white cast. 4. I don't notice much of a white cast. 3; I notice a slight white cast. 2; I feel a white cast. 1; I notice a significant white cast.

[0034] (2) Natural finish: Five expert panelists evaluated the naturalness of the finish of each powdered / solid cosmetic (face powder) applied to the skin using a puff, based on the following criteria. The results are shown as the average score of the five panelists. 5; The finished look is quite natural. 4. The finished look is natural. 3; The finished look is somewhat natural. 2; The finished look doesn't look very natural. 1. The finished look doesn't look natural.

[0035] (3) Coverage of skin imperfections: Five expert panelists evaluated the skin's ability to cover uneven skin texture when applying each powdered / solid cosmetic (face powder) to the skin using a puff, according to the following criteria. The results are shown as the average score of the five panelists. 5; It effectively covers uneven skin texture. 4; It covers uneven skin texture. 3; It slightly covers uneven skin texture. 2. It doesn't cover skin imperfections very well. 1. It does not cover uneven skin texture.

[0036] (4) Smooth and easy to spread: Five expert panelists conducted a sensory evaluation of each powdered cosmetic (face powder) when applied to the skin using a puff, assessing its smoothness and spreadability according to the following criteria. The results are shown as the average score of the five panelists. 5; It spreads very smoothly on the skin. 4; It spreads smoothly and nicely on the skin. 3; It spreads fairly well on the skin. 2. It doesn't spread very well on the skin. 1. It doesn't spread well on the skin.

[0037] [Table 1]

[0038] Example 15 Solid powder cosmetics (powder foundations) with the compositions shown in Table 2 were manufactured in the same manner as in Examples 1 to 14. The resulting solid powder cosmetic (powder foundation) does not leave a white cast, provides a natural finish, offers excellent coverage of skin imperfections, and spreads smoothly during application.

[0039] [Table 2]

Claims

1. The following components (A), (B), (C), and (D): (A) Zinc oxide with a volume-average particle size of 0.1 to 1 μm, 0.1 to 25% by mass. (B) Corn starch powder with a volume-average particle size of 2 to 20 μm, (C) Talc 20-90% by mass, (D) Liquid oil component at 25°C: 0.5-14% by mass It contains, A solid powder cosmetic composition in which the mass ratio of the total amount of components (A) and (B) to component (C) ((A) + (B)) / (C) is 0.01 to 1.

1.

2. The powder cosmetic composition according to claim 1, wherein the content of component (B) is 0.5 to 20% by mass.

3. The powder cosmetic composition according to claim 1 or 2, wherein the mass ratio (A) / (B) of component (A) to component (B) is 0.05 to 10.

Images