Powder cosmetic

Abstract

To provide a powder cosmetic which maintains natural luster of skin while suppressing shine with time, in which makeup breakdown is suppressed, and in which an applied color remains unchanged.SOLUTION: A powder cosmetic comprising the following components (A), (B) and (C): (A) a plate-like powder having an average particle diameter of 3 to 200 μm and an aspect ratio of 10 to 120, (B) methylpolysiloxane having a viscosity at 25°C of 30 to 10000 mPa s, and (C) a spherical inorganic powder.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a powder cosmetic. [Background technology]

[0002] Conventionally, powder cosmetics have been required to have smoothness upon application and excellent cosmetic durability. For example, a patent document describes that a solid powder cosmetic containing synthetic phlogopite and / or iron-containing synthetic phlogopite, organic plate-like powder, boron nitride, spherical powder with an average particle size of 0.2 to 10 μm, and an oil that is liquid at 25°C has excellent moldability and impact resistance, a smooth feel when applied, excellent adhesion to the skin, a suppressed powdery feel, and makes irregularities such as pores less noticeable. Patent Document 2 describes that a solid powder cosmetic containing a composite powder containing spherical silica and titanium oxide, an organic spherical elastic powder, a plate-like powder, and an oil agent can be taken up in an optimal amount using a sponge or the like, reduces the sense of resistance when applied to the skin using a sponge or the like, and provides a natural finish without leaving a white cast while having excellent unevenness coverage. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-209346 [Patent Document 2] Patent Publication No. 2021-080182 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional powder cosmetics, when used to create a lustrous finish, tend to become shiny over time and the makeup tends to come off, making it difficult to achieve a natural, lustrous finish and maintain it. [Means for solving the problem]

[0005] The present inventors have discovered that by combining a plate-like powder having an average particle size of 3 to 200 μm and an aspect ratio of 10 to 120 with a methylpolysiloxane of a specific viscosity and a spherical inorganic powder, it is possible to obtain a powder cosmetic that maintains a natural, lustrous skin, suppresses shine over time, prevents makeup from coming off, and maintains the same color when applied.

[0006] The present invention comprises the following components (A), (B) and (C): (A) Plate-like powder having an average particle size of 3 to 200 μm and an aspect ratio of 10 to 120, (B) a methylpolysiloxane having a viscosity at 25°C of 30 to 10,000 mPa·s; (C) Spherical inorganic powder The present invention relates to a powder cosmetic containing the above. [Effects of the Invention]

[0007] The powder cosmetic of the present invention does not powder out immediately after application, maintains a natural gloss on the skin, suppresses shine over time, prevents makeup from coming off, and does not change the applied color after being blended into the skin. DETAILED DESCRIPTION OF THE INVENTION

[0008] The component (A) used in the present invention is a plate-like powder having an average particle size of 3-200 μm and an aspect ratio of 10-120. Examples of the plate-like powder include those commonly used in cosmetics, such as boron nitride, silicic acid, silicic anhydride, magnesium silicate, sericite, talc, mica, synthetic mica, kaolin, clay, bentonite, synthetic phlogopite, bismuth oxychloride, zirconium oxide, magnesium oxide, aluminum oxide, calcium sulfate, barium sulfate, magnesium sulfate, calcium carbonate, and magnesium carbonate. Also usable are pearl pigments in which the surface of a plate-like powder such as mica, synthetic phlogopite, glass, silica, or alumina is coated with a colorant such as titanium oxide, iron oxide, silicon oxide, Prussian blue, chromium oxide, tin oxide, chromium hydroxide, gold, silver, carmine, or an organic pigment. Of these, from the viewpoint of imparting a lustrous finish to the skin, it is preferable to include one or more selected from mica, synthetic mica, and pearl pigments, and it is more preferable to include synthetic mica.

[0009] The plate-like powder of component (A) has an average particle size of 3 to 200 μm, preferably 5 to 100 μm, and more preferably 7 to 50 μm. The plate-like powder of component (A) has an aspect ratio of 20-120, preferably 25-100, and more preferably 30-80. In the present invention, the average particle size is measured by electron microscope observation or a particle size distribution analyzer using a laser diffraction / scattering method. Specifically, in the case of the laser diffraction / scattering method, ethanol is used as a dispersion medium and a laser diffraction / scattering particle size distribution analyzer (e.g., LA-920 manufactured by Horiba, Ltd.) is used to measure, and the 50% median diameter is taken as the average particle size. The thickness is measured using an atomic force microscope to determine the difference from a reference plane, and the arithmetic mean is taken as the average thickness. The aspect ratio is calculated from the ratio of the average particle diameter to the average thickness, and is defined as aspect ratio=average particle diameter / average thickness.

[0010] These plate-like powders may be used as they are, or may be subjected to a hydrophobic treatment by a conventional method before use. Examples of hydrophobic treatments include surface treatments such as 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 of the plate-like powder, silicone treatment, amino acid treatment, and acylated amino acid treatment are preferred, with silicone treatment being more preferred.

[0011] Component (A) can be used alone or in combination of two or more, and from the viewpoint of imparting radiance to the skin, the content is preferably 25% by mass or more of the total composition, more preferably 30% by mass or more, even more preferably 35% by mass or more, and preferably 90% by mass or less, more preferably 80% by mass or less, even more preferably 60% by mass or less. The content of component (A) is preferably 25 to 90% by mass of the total composition, more preferably 30 to 80% by mass, even more preferably 35 to 60% by mass.

[0012] Component (B) is a methylpolysiloxane having a viscosity of 30 to 10,000 mPa·s at 25°C. From the viewpoints of achieving a natural, lustrous complexion by reflecting light in a fixed direction from a plate-like powder having a specific average particle size and a specific aspect ratio, suppressing shine over time, and preventing makeup from smearing, methylpolysiloxanes having a viscosity of 50 to 8,000 mPa·s at 25°C are preferred, and methylpolysiloxanes having a viscosity of 100 to 5,000 mPa·s are more preferred. In the present invention, viscosity is measured at 25°C using a Brookfield viscometer (Model TVB-10, manufactured by Toki Sangyo Co., Ltd., measurement conditions: rotors TM1 to TM4, 6 rpm, 1 minute). Viscosities of 30 to 1000 mPa s are measured using TM1, viscosities of 1000 to 5000 mPa s using TM2, and viscosities of 5000 to 10000 mPa s using TM3.

[0013] Component (B) can be used alone or in combination of two or more types, and its content is preferably 4% by mass or more, more preferably 6% by mass or more, even more preferably 8% by mass or more, and preferably 35% by mass or less, more preferably 25% by mass or less, and even more preferably 18% by mass or less, based on the viewpoint that the reflected light from the plate-like powder having a specific average particle size and a specific aspect ratio is reflected in a certain direction to give a natural, lustrous skin, and that shine and makeup wear are suppressed over time. The content of component (B) is preferably 4 to 35% by mass, more preferably 6 to 25% by mass, and even more preferably 8 to 18% by mass, based on the total composition.

[0014] Component (C) is a spherical inorganic powder. The spherical shape includes a perfect sphere, an approximately sphere, and a spheroid, and may also be a spherical powder with an irregular surface. The spherical powder of component (C) is one commonly used in cosmetics, such as spherical silicic anhydride, spherical alumina, spherical titania, etc. Of these, it is preferable to contain silicic anhydride from the viewpoint of controlling the applied color after blending into the skin. As with component (A), the spherical inorganic powder of component (C) may be a hydrophobized spherical powder, and silicone-treated spherical powder is preferred.

[0015] From the viewpoint of controlling the applied color after blending into the skin, component (C) preferably has a volume average particle size of 1 to 50 μm, more preferably 2 to 25 μm. 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. In addition, in order to prevent shine and makeup from coming off over time, the specific surface area is set to 40 to 500 m 2 / g, and 70 to 320m 2 / g is more preferred. The specific surface area is measured by the BET method (N2). Furthermore, from the viewpoint of controlling excess sebum in pores, the oil absorption is preferably 15 to 300 mL / 100 g, and more preferably 25 to 220 mL / 100 g. The oil absorption is measured according to JIS K 5101-13-1 (2004) Section 1: Refined linseed oil method.

[0016] Component (C) can be used alone or in combination of two or more, and its content is preferably 3% by mass or more, more preferably 6% by mass or more, even more preferably 9% by mass or more, and preferably 30% by mass or less, more preferably 18% by mass or less, and even more preferably 15% by mass or less, from the viewpoints of controlling excess sebum in pores while maintaining a natural luster on the skin, suppressing shine over time, preventing makeup from coming off, and controlling the applied color after blending into the skin. The content of component (C) is preferably 3 to 30% by mass, more preferably 6 to 18% by mass, and even more preferably 9 to 15% by mass.

[0017] In the present invention, the mass ratio of the total of components (A) and (C) to component (B), [(A)+(C)] / (B), is preferably 1.5 or more, more preferably 2.5 or more, even more preferably 3 or more, and is preferably 20 or less, more preferably 12 or less, and even more preferably 7 or less, from the viewpoints of achieving a natural, lustrous skin without powdery deposits immediately after application, suppressing shine and makeup wear over time, and controlling the applied color after blending into the skin. Furthermore, the mass ratio of the total of components (A) and (C) to component (B), [(A)+(C)] / (B), is preferably 1.5 to 20, more preferably 2.5 to 12, and even more preferably 3 to 7.

[0018] The powder cosmetic of the present invention may further contain zinc oxide other than component (A), which allows for the control of the applied color after blending into the skin. As with component (A), such zinc oxide may be hydrophobized. The content of zinc oxide other than component (A) in the total composition is preferably 0.1 to 15 mass %, more preferably 1 to 8 mass %, and even more preferably 2 to 6 mass %.

[0019] The powder cosmetic of the present invention may further contain a color pigment. Examples of color pigments include those commonly used in cosmetics, such as metal oxides such as titanium oxide, yellow iron oxide, red iron oxide, black iron oxide, Prussian blue, ultramarine blue, chromium oxide, and chromium hydroxide; metal complexes such as manganese violet and cobalt titanate; 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. 505, Orange No. 203, Orange No. 204, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 401, Blue No. 1, and Blue 404; and natural organic pigments such as β-carotene, caramel, and paprika pigment. As with component (A), these color pigments may be hydrophobized before use.

[0020] One or more color pigments can be used, and the content thereof is preferably 0.01 to 10% by mass, more preferably 0.1 to 4% by mass, and even more preferably 0.3 to 1% by mass, of the total composition from the viewpoint of imparting natural brightness to the skin and a makeup effect.

[0021] In addition to the above-mentioned components, the powder cosmetic of the present invention may contain components used in ordinary cosmetics, such as powders other than those mentioned above, oily components other than those mentioned above, surfactants, thickeners, preservatives, fragrances, UV absorbers, moisturizers, salts, solvents, antioxidants, chelating agents, neutralizing agents, pH adjusters, blood circulation promoters, cooling agents, antiperspirants, disinfectants, skin activators, etc.

[0022] From the viewpoints of being environmentally friendly, providing excellent usability, and controlling the application color after blending with the skin, the powder cosmetic of the present invention preferably contains an organic resin powder in an amount of 1% by mass or less, more preferably 0.1% by mass or less, and even more preferably substantially free of organic resin powder, based on the total composition. 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.

[0023] The powder cosmetic of the present invention can be a powder cosmetic or a solid powder cosmetic, and is preferably a solid powder cosmetic. The powder cosmetic of the present invention can be produced according to a conventional method. When preparing a powdered cosmetic, for example, all powder components including components (A) and (C) are mixed uniformly, and if necessary, other components are added and further mixed, and then the mixture is pulverized and passed through a sieve, whereby a powdered cosmetic can be produced. When a solid powder cosmetic is used, it can be produced by either a dry method or a wet method. When dry-processing is used, for example, all powder components including components (A) and (C) are mixed and pulverized, and then an oily component including component (B) is added and mixed. The resulting mixture is then pulverized in a pulverizer, and the pulverized product is filled into a container and molded at a molding pressure of 1000 to 2500 kgf, thereby obtaining a solid powder cosmetic.

[0024] The powder cosmetic of the present invention can be, for example, a makeup cosmetic such as face powder, powder foundation, concealer, highlighter, shading, blusher, eye shadow, etc. [Example]

[0025] Examples 1 to 7 and Comparative Example 1 A solid powder cosmetic (powder foundation) was prepared with the composition shown in Table 1, and evaluated for the glossiness of the skin (cheeks) immediately after application, the lack of powderiness immediately after application, the lack of noticeable shine after 8 hours, the lack of makeup smudging after 8 hours, and the lack of change in applied color after blending into the skin after 8 hours. The results are also shown in Table 1.

[0026] (Manufacturing method) After all the powder ingredients including components (A) and (C) were mixed and pulverized, an oil containing component (B) was added and mixed, and the resulting mixture was further pulverized in a pulverizer. The pulverized product was filled into a container and molded at a molding pressure of 1000 to 2500 kgf to obtain a solid powder cosmetic product (powder foundation).

[0027] (Evaluation method) Five expert evaluators applied each solid powder cosmetic (powder foundation) to the skin and evaluated it based on the following criteria: the glossiness of the skin (cheeks) immediately after application, the lack of powderiness immediately after application, the lack of shine after 8 hours, the lack of makeup smudging after 8 hours, and the lack of change in the applied color after blending into the skin after 8 hours. The results are shown as the cumulative scores of the five evaluators.

[0028] (1) Shiny skin (cheeks) immediately after application: 5: Immediately after application, the skin (cheeks) has a very natural glow. 4. Immediately after application, the skin (cheeks) has a natural glow. 3: Immediately after application, the skin (cheeks) has a slight natural glow. 2: Immediately after application, the skin (cheeks) does not have much of a natural glow. 1: Immediately after application, the skin (cheeks) lacks a natural glow.

[0029] (2) No powdery residue immediately after application: 5: There is absolutely no powdery feeling immediately after application to the skin. 4. There is no powdery feeling immediately after application to the skin. 3. I don't feel much powder on my skin immediately after applying it. 2: Immediately after applying to the skin, there is a slight powdery feeling. 1: I feel powder coming off my skin immediately after applying it.

[0030] (3) Less noticeable shine after 8 hours: 5: After 8 hours of application, there is no noticeable shine at all. 4. After 8 hours of application, the shine is not noticeable. 3: After 8 hours of application, the shine is not very noticeable. 2: Eight hours after application, the shine is slightly noticeable. 1: Shine becomes noticeable 8 hours after application.

[0031] (4) Makeup wear after 8 hours: 5: After 8 hours of application, there is no makeup smudging whatsoever. 4: Makeup remains intact 8 hours after application. 3: After 8 hours of application, my makeup didn't come off very easily. 2: Eight hours after application, makeup was slightly ruined. 1: Makeup came off 8 hours after application.

[0032] (5) Color consistency after application and absorption into the skin 8 hours later: After 5-8 hours, the applied color remains unchanged. 4. After 8 hours, the applied color remains unchanged. 3. After 8 hours, the color of the product has not changed much. 2: After 8 hours, the color of the applied product changes slightly. 1. After 8 hours, the applied color will change.

[0033] [Table 1]

[0034] Example 8 The solid powder cosmetic (powder foundation) having the composition shown in Table 2 was produced in the same manner as in Examples 1 to 7, and did not powder out immediately after application, maintained a natural, lustrous skin, suppressed shine over time, prevented makeup from coming off, and did not change the applied color.

[0035] [Table 2]

Claims

1. The following components (A), (B), and (C): (A) Plate-like powder having an average particle size of 3 to 200 μm and an aspect ratio of 10 to 120; (B) a methylpolysiloxane having a viscosity at 25°C of 30 to 10,000 mPa·s; (C) Spherical inorganic powder A powder cosmetic containing

2. 2. The powder cosmetic according to claim 1, wherein component (C) is a spherical inorganic powder that has been hydrophobized.

3. 3. The powder cosmetic according to claim 1, wherein the content of component (A) is 25 to 90% by mass, the content of component (B) is 4 to 35% by mass, and the content of component (C) is 3 to 30% by mass.

4. 3. The powder cosmetic according to claim 1, wherein component (A) comprises one or more selected from the group consisting of mica, synthetic mica, and pearl pigments.

5. 3. The powder cosmetic according to claim 1, wherein component (C) is silicic anhydride.

6. 3. The powder cosmetic according to claim 1, wherein the mass ratio of the total of components (A) and (C) to component (B), [(A) + (C)] / (B), is 1.5 to 20.

Images