Powder cosmetics

Abstract

To provide powder cosmetics that prevent the makeup from running due to the wearing of a mask and have reduced irritation to the skin.SOLUTION: Powder cosmetics are used for a site to touch at least a mask when the mask is worn, and contain (A) porous spherical powder, and (B) powder different in shape and / or particle size from the (A) porous spherical powder. The powder cosmetics can absorb water of 100-180 ml / 100 g.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a powder cosmetic preparation to be applied to at least the parts that come into contact with a mask when the mask is worn. [Background technology]

[0002] To finish off your makeup, it is common to use face powder with a low oil content. Face powder absorbs sebum and sweat, which helps foundation last longer and prevents makeup from coming off. It also has the aesthetic effect of diffusing light to make the skin look more three-dimensional. Carefully applying face powder can also solve problems such as creasing eyeshadow and uneven blush.

[0003] Patent Literature 1 describes a finishing cosmetic that contains fine cellulose fibers and a polymer with film-forming ability as a finishing cosmetic that can prevent makeup from coming off or secondary adhesion. This cosmetic forms a soft film immediately after being sprayed or misted, covering makeup such as foundation, and can prevent makeup from coming off or secondary adhesion. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2018 / 221519 DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0005] Conventionally, masks have been used more and more for the purpose of preventing infection by bacteria and viruses, blocking pollen and house dust that cause bronchitis, asthma, allergic diseases, and preventing cold weather. When wearing makeup and using a mask, there is a problem that the makeup is likely to adhere to the mask and cause makeup to come off. There is also a problem that the friction between the mask and the skin causes skin irritation. In particular, in recent years, there have been more and more opportunities to wear masks regardless of the season from the viewpoint of infection prevention, and there is a high demand for preventing makeup from coming off and skin irritation caused by wearing a mask.

[0006] After extensive research, the inventors found that makeup run-off and skin irritation caused by wearing a mask are not only due to secondary adhesion to the mask and friction between the mask and the skin, but also that the skin becomes steamy in the gaps and edges between the mask and the skin, making makeup more likely to come off, and that steam inside the mask exacerbates skin irritation, with high humidity trapped inside the mask also being a contributing factor. The present invention has been made in consideration of the above circumstances, and has an object to provide a powder cosmetic that can suppress makeup run-off and skin irritation caused by wearing a mask. [Means for solving the problem]

[0007] The powder cosmetic of the present invention is a powder cosmetic to be used at least on the part that comes into contact with a mask when the mask is worn, (A) a porous spherical powder; (B) (A) a powder having a different shape and / or particle size from the porous spherical powder, Including, The water absorption capacity of the powder cosmetic is 100 to 180 ml / 100 g.

[0008] The (A) porous spherical powder is preferably porous spherical silica.

[0009] It is preferable that the cosmetic contains (A) porous spherical silica at 50 to 99 mass % based on the total mass of the cosmetic.

[0010] The mass ratio of the (B) powder to the (A) porous spherical silica is preferably 0.03 to 0.3.

[0011] The (B) powder is preferably a plate-like powder or a spherical silicone resin powder. Effect of the Invention

[0012] The powder cosmetic of the present invention is a powder cosmetic to be used at least on the part that comes into contact with a mask when the mask is worn, (A) a porous spherical powder; (B) (A) a powder having a different shape and / or particle size from the porous spherical powder, Including, The water absorption capacity of the powder cosmetic is 100 to 180 ml / 100 g, which can prevent makeup from coming off and skin irritation caused by wearing a mask. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The powder cosmetic of the present invention will be described in detail below. The powder cosmetic of the present invention is a powder cosmetic to be used at least on the part that comes into contact with a mask when the mask is worn, (A) a porous spherical powder; (B) (A) a powder having a different shape and / or particle size from the porous spherical powder, Including, The water absorption capacity of the powder cosmetic is 100 to 180 ml / 100 g.

[0014] The powder cosmetic of the present invention is a powder cosmetic to be used at least on the parts that come into contact with the mask when it is worn, and in detail, it can be used not only on the skin that faces the mask body when the mask is worn and the skin that comes into contact with the ear loops of the mask when it is worn, but also on the border between the mask body and the mask when it is worn, around the mask and the ear loops, in other words, on the periphery of the mask. Each component will be described in detail below.

[0015] (A) Porous spherical powder The porous spherical powder (A) used in the present invention has a specific surface area of ​​100 m 2 / g or more, and the specific surface area is preferably 300 m 2 / g or more is more preferable. The specific surface area is calculated by measuring the amount of nitrogen adsorbed to the powder at 77 K and analyzing it by the BET method. The measuring device used is an OMNISORP manufactured by Beckmann Coluter.

[0016] The average particle size of the (A) porous spherical powder is preferably 0.1 to 20 μm, more preferably 1 to 15 μm, and even more preferably 3 to 10 μm. An average particle size of 0.1 μm or more provides good usability, and an average particle size of 10 μm or less provides a good blurring effect. The average particle size is a value measured as the volume average particle size (D50) using a laser diffraction / scattering type particle size distribution measuring device (MT3300EXII; manufactured by Microtrack Bell).

[0017] The material of the (A) porous spherical powder is not particularly limited, but examples thereof include silica (silicic anhydride) and cellulose, with silica being preferred. (A) Commercially available silica powders that can be used as the porous spherical powder include spherical porous silica (SILDEX L-51, manufactured by Asahi Glass Co., Ltd., with a specific surface area of ​​300 m 2 / g, average particle size 5μm), spherical porous silica (Catalysts and Chemical Industries Co., Ltd. spherical silica P-1500, specific surface area 160m 2 / g, average particle size 5 μm. (A) The porous spherical powder may be used singly or in combination of two or more types.

[0018] The content of (A) porous spherical silica is preferably 50 to 99% by mass, more preferably 65 to 95% by mass, and even more preferably 70 to 90% by mass, based on the total amount of the cosmetic. By including (A) porous spherical silica in an amount of 50% by mass or more based on the total amount of the cosmetic, makeup run-off and skin irritation can be further suppressed, and by including (A) porous spherical silica in an amount of 99% by mass or less based on the total amount of the cosmetic, clogging in the container can be prevented, and the range of container options can be expanded.

[0019] (B) (A) Porous spherical powder and powders with different shapes and / or particle sizes (B) powders having a shape and / or particle size different from that of the (A) porous spherical powder (hereinafter simply referred to as (B) powder) mean that the shape and size of the particles are different from those of the (A) porous spherical powder, and examples of such shapes include plate-like shapes such as flake-like, thin plate-like, scale-like, leaf-like, mica-like, and foil-like, spherical shapes such as true spheres, approximately spheres, oval spheres, and pseudospheres (however, when the particle shape is the same as that of the (A) porous spherical powder, the size is different), rod-like, hemispherical, irregular, and lump-like shapes. Examples of the (B) powder include plate-like powders, spherical powders having a different particle size from that of the (A) porous spherical powder, rod-like powders, and irregular-shaped powders.

[0020] Plate-like powders are distinguished from spherical powders in that their aspect ratio (average particle diameter / average thickness) is greater than 1, for example, at least 5 or more; however, it is preferably 20 or more, more preferably in the range of 35 to 80, and even more preferably in the range of 50 to 65.

[0021] Specifically, examples of the powder include plate-like powders made of mica, sericite, talc, kaolin, alumina, barium sulfate, boron nitride, N-acylated lysine, synthetic phlogopite, synthetic mica, synthetic talc, zinc oxide, silica, fish scale foil, bismuth oxychloride, etc., and one or more of these can be appropriately selected and used. The plate-like powder may be surface-treated like the spherical powder described below, or may not be surface-treated.

[0022] The spherical powder is not particularly limited as long as it is a material of spherical powder that can be normally blended into cosmetics, but if the shape of the particles is the same as that of the (A) porous spherical powder, the size is different. Examples of the spherical powder include polyethylene, polypropylene, polystyrene, polymethylmethacrylate, polyamide resin (nylon), urethane, silicone resin, silicone rubber, silicone resin-coated rubber, polytetrafluoroethylene, silicon dioxide (silica), copolymer resin of styrene and acrylic acid, benzoguanamine resin, and cellulose. It is preferable not to include microplastic beads such as resin powder. An example of a commercially available silicone powder is "KSP-102" (manufactured by Shin-Etsu Chemical Co., Ltd., (vinyl dimethicone / methicone silsesquioxane) crosspolymer, average particle size: 30 μm).

[0023] The spherical powder may be surface-treated, for example, with a silicone compound, a fluorine-modified silicone compound, a fluorine compound, a higher fatty acid, a higher alcohol, a fatty acid ester, a metal soap, an amino acid, or an alkyl phosphate.

[0024] The particle size (average particle size) of the spherical powder is preferably in the range of 1 to 30 μm in terms of feel when used, and more preferably in the range of 3 to 20 μm.

[0025] Examples of the rod-shaped powder include titanium oxide, titanate, calcium carbonate, silica, alumina, zirconia, halloysite, etc. The size of the rod-shaped powder is preferably such that the minor axis is 0.005 to 0.2 μm, the ratio of the minor axis to the major axis is in the range of 1:10 to 1:1000, and the major axis is 0.5 μm or more.

[0026] The rod-shaped powder may be a surface-treated powder. Examples of the surface treatment include inorganic treatment with a metal oxide such as titania, treatment with an amino acid, a metal soap, a silane coupling agent, a titanium coupling agent, or an aluminum coupling agent, treatment with a silicone or a fluorine compound, treatment with a fatty acid, treatment with an oil, treatment with a natural product such as a polysaccharide, treatment with silk, acylated lysine, or keratin, treatment with a resin such as PMMA (polymethyl methacrylate), treatment with plasma, and treatment with a mechanochemical agent.

[0027] The irregular shaped powder does not include powders having a plate-like or spherical shape, and examples of the irregular shaped powder include silica, aluminum oxide, zirconia oxide, titanium dioxide, and zinc oxide. The average particle size of the irregular shaped powder is not particularly limited, but is preferably about 1 to 100 μm. The irregular shaped powder may be in any form, such as a fine powder or a granulated powder. The granulated powder refers to a powder that is compressed or solidified with a binder or the like. The irregular shaped powder may also be surface-treated, like the spherical powder and rod-like powder.

[0028] The shape of the powder is measured by the particle size obtained by observation with a transmission electron microscope (TEM) or a scanning electron microscope (SEM). One or more types of (B) powder can be appropriately selected and used.

[0029] The mass ratio of the (B) powder to the (A) porous spherical powder ((B) / (A)) is preferably 0.03 to 0.3. When the mass ratio of the (B) powder to the (A) porous spherical powder is 0.03 or more, the (A) porous spherical powder can be prevented from caking, and when it is 0.3 or less, makeup run-off and skin irritation can be prevented.

[0030] (Water absorption of powder cosmetics) The water absorption of the powder cosmetic of the present invention is 100 to 180 ml / 100 g. More preferably, it is 105 to 175 ml / 100 g, and further preferably, it is 110 to 170 ml / 100 g. By having a water absorption of 100 ml / 100 g or more, makeup breakdown caused by wearing a mask can be suppressed, and by having a water absorption of 180 ml / 100 g or less, rough skin when wearing a mask can be suppressed. The water absorption was calculated according to the following formula, following the index JIS K-5101 for measuring oil absorption, by precisely weighing 1 g of the powder cosmetic in an atmosphere of 25°C after leaving it at 70°C for 12 hours before measurement and placing it on a glass plate, dripping ion-exchanged water into the center of the powder in small amounts, and kneading it with a spatula each time until it becomes uniform, and the end point is just before the entire product becomes paste-like and becomes fluid, and the water absorption was calculated according to the following formula. Water absorption (g / 100g) = (ion-exchanged water (g) / amount of sample (g)) x 100

[0031] In addition to the above-mentioned essential components (A) and (B), the powder cosmetic of the present invention can contain, as necessary, appropriate components that are typically used in cosmetics and topical skin preparations such as pharmaceuticals, such as oily components, ultraviolet absorbers, surfactants, moisturizers, thickeners, alcohols, other powder components, various drugs, etc.

[0032] Examples of oily components include natural oils and fats such as camellia oil, macadamia nut oil, olive oil, castor oil, safflower oil, soybean oil, tea seed oil, cacao butter, coconut oil, hardened coconut oil, palm oil, Japan wax, hardened castor oil, beeswax, candelilla wax, carnauba wax, lanolin, liquid lanolin, jojoba wax, hard lanolin, polyoxyethylene lanolin alcohol ether, and polyoxyethylene cholesterol ether; hydrocarbon oils and fats such as liquid paraffin, ozokerite, squalene, paraffin, ceresin, petrolatum, and microcrystalline wax; isopropyl myristate, octyldodecyl myristate, isopropyl palmitate, cholesteryl 12-hydroxystearate, dihydroxystearate, and glyceryl stearate. Examples of the silicone oil include synthetic oil components such as ethylene glycol 2-ethylhexyl, dipentaerythritol fatty acid ester, pentaerythritol tetra-2-ethylhexyl, glycerin tri-2-ethylhexyl, trimethylolpropane triisostearate, cetyl-2-ethylhexanoate, and castor oil fatty acid methyl ester; linear polysiloxanes such as dimethylpolysiloxane, methylphenylpolysiloxane, and methylhydrogenpolysiloxane; cyclic polysiloxanes such as decamethylpolysiloxane, dodecamethylpolysiloxane, and tetramethyltetrahydrogenpolysiloxane; and silicones such as silicone resins and silicone rubbers capable of forming a three-dimensional network structure.

[0033] Examples of the ultraviolet absorber include para-aminobenzoic acid, para-aminobenzoic acid monoglycerin ester, N,N-dipropoxypara-aminobenzoic acid ethyl ester, N,N-dimethyl ... Benzoic acid-based UV absorbers such as ethyl para-aminobenzoate, anthranilic acid-based UV absorbers such as homomenthyl-N-acetylanthranilate, salicylic acid-based UV absorbers such as amyl salicylate, homomenthyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, and p-isopropanol phenyl salicylate, octyl cinnamate, ethyl 4-isopropyl cinnamate, and methyl 2,5-diisopropyl Cinnamic acid-based UV absorbers such as rus cinnamate, ethyl 2,4-diisopropyl cinnamate, propyl p-methoxycinnamate, isoamyl p-methoxycinnamate, octyl p-methoxycinnamate (2-ethylhexyl p-methoxycinnamate), 2-ethoxyethyl p-methoxycinnamate, 2-ethylhexyl α-cyano-β-phenyl cinnamate, and glyceryl mono-2-ethylhexanoyl di-p-methoxycinnamate. absorbents, benzophenone-based ultraviolet absorbers such as 2,4-dihydroxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2',4,4'-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonate, 4-phenylbenzophenone, and 2-ethylhexyl-4'-phenylbenzophenone-2-carboxylate, 3-(4'-methylbenzylidene)benzophenone-based ultraviolet absorbers, Examples of such benzoyl compounds include 2,2'-hydroxy-5-methylphenylbenzotriazole, 2-(2'-hydroxy-5'-t-octylphenyl)benzotriazole, dibenzalazine, dianisoylmethane, 4-methoxy-4'-t-butyldibenzoylmethane, and 5-(3,3-dimethyl-2-norbornylidene)-3-pentan-2-one.

[0034] Examples of lipophilic nonionic surfactants include sorbitan fatty acid esters such as sorbitan monooleate, sorbitan monoisostearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquioleate, diglycerol sorbitan penta-2-ethylhexyl acid, etc.; glycerin or polyglycerin esters such as glycerin monostearate, α,α'-oleic acid pyroglutamic acid glycerin, monostearate glycerin malate, etc.; propylene glycol fatty acid esters such as propylene glycol monostearate, etc.; hydrogenated castor oil derivatives; and glycerin alkyl ethers.

[0035] Examples of the anionic surfactant include fatty acid soaps such as sodium laurate and sodium palmitate, higher alkyl sulfates such as sodium lauryl sulfate and potassium lauryl sulfate, alkyl ether sulfates such as polyoxyethylene triethanolamine lauryl sulfate and sodium polyoxyethylene lauryl sulfate, N-acylsarcosinates such as sodium lauroyl sarcosine, higher fatty acid amide sulfonates such as sodium N-myristoyl-N-methyl taurine, sodium coconut oil fatty acid methyl tauride and sodium lauryl methyl tauride, phosphates such as sodium polyoxyethylene oleyl ether phosphate and sodium polyoxyethylene stearyl ether phosphate, and sulfosuccinates such as sodium di-2-ethylhexyl sulfosuccinate, sodium monolauroyl monoethanolamide polyoxyethylene sulfosuccinate and sodium lauryl polypropylene glycol sulfosuccinate. salts, alkylbenzenesulfonates such as sodium linear dodecylbenzenesulfonate and triethanolamine linear dodecylbenzenesulfonate; N-acylglutamic acids such as monosodium N-lauroylglutamate and disodium N-stearoylglutamate; higher fatty acid ester sulfates such as sodium hydrogenated coconut oil fatty acid glycerin sulfate; polyoxyethylene alkyl ether carboxylates, α-olefin sulfonates, higher fatty acid ester sulfonates, secondary alcohol sulfates, higher fatty acid alkylolamide sulfates, sodium lauroylmonoethanolamide succinate, N-palmitoyl aspartic acid, ditriethanolamine, and coconut oil fatty acid collagen hydrolyzed alkali salts.

[0036] Examples of cationic surfactants include alkyl trimethyl ammonium salts such as stearyl trimethyl ammonium chloride and lauryl trimethyl ammonium chloride, dialkyl dimethyl ammonium salts such as distearyl dimethyl ammonium chloride, alkyl pyridinium salts such as poly(N,N'-dimethyl-3,5-methylene piperidinium) chloride and cetyl pyridinium chloride, alkyl quaternary ammonium salts, alkyl dimethyl benzyl ammonium salts, alkyl isoquinolinium salts, dialkyl morphonium salts, polyoxyethylene alkyl amines, alkyl amine salts, polyamine fatty acid derivatives, amyl alcohol fatty acid derivatives, benzalkonium chloride, benzethonium chloride, cationic polymers, β-NN-dimethyl-N-ethylammonioethyl acrylate vinylpyrrolidone chloride copolymers, and the like.

[0037] Examples of amphoteric surfactants include imidazoline-based amphoteric surfactants such as 2-undecyl-N,N,N-(hydroxyethylcarboxymethyl)-2-imidazoline sodium and 2-cocoyl-2-imidazolinium hydroxide-1-carboxyethyloxy disodium salt, and betaine-based amphoteric surfactants such as 2-heptadecyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, lauryl dimethylaminoacetic acid betaine, alkyl betaine, amido betaine, and sulfobetaine.

[0038] Examples of moisturizing agents include cholesteryl-12-hydroxystearate, sodium lactate, dl-pyrrolidone carboxylate, urea, and diglycerol ethylene oxide / propylene oxide adduct.

[0039] Examples of thickening agents include gum arabic, carrageenan, tragacanth gum, quince seed, casein, sodium caseinate, dextrin, gelatin, sodium alginate, methylcellulose, ethylcellulose, carboxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, polyvinyl alcohol, sodium polyacrylate, carboxyvinyl polymer, guar gum, xanthan gum, magnesium aluminum silicate, bentonite, and hectorite.

[0040] Examples of polyhydric alcohols include ethylene glycol, propylene glycol, dipropylene glycol, 1,3-butylene glycol, glycerin, erythritol, trimethylolpropane, pentaerythritol, sorbitol, maltitol, diglycerin, and polyethylene glycol.

[0041] The other powder components may contain extender pigments or powders other than (A) and (B) specified in the present invention, and examples thereof include inorganic powders such as talc, kaolin, sericite, phlogopite, synthetic mica, magnesium carbonate, calcium carbonate, aluminum silicate, zeolite, calcined calcium sulfate (calcined gypsum), calcium phosphate, fluorapatite, hydroxyapatite, ceramic powder, metal soap (zinc myristate, calcium palmitate, aluminum stearate, etc.), boron nitride, polyamide resin powder (nylon powder), polyethylene powder, polymethylmethacrylate powder, polystyrene powder, styrene-acrylic acid copolymer resin powder, polymethysilsesquioxane powder, and the like. Examples of the pigments include inorganic pigments such as titanium dioxide, iron oxide (red iron oxide), iron titanate, yellow iron oxide, black iron oxide, carbon black, low-order titanium oxide, mango violet, cobalt violet, chromium oxide, ultramarine, and Prussian blue, pearl pigments such as titanium oxide-coated mica, titanium oxide-coated bismuth oxychloride, colored titanium oxide-coated mica, bismuth oxychloride, and fish scale foil, metal powder pigments such as aluminum powder, organic pigments such as Red No. 201, Red No. 202, Orange No. 203, Yellow No. 205, Yellow No. 401, and Blue No. 404, organic pigments such as zirconium, barium, and aluminum lakes such as Red No. 3, Yellow No. 4, Green No. 3, and Blue No. 1, and natural pigments such as chlorophyll and β-carotene. Examples of the synthetic resin emulsions include acrylic resin emulsions and polyvinyl acetate resin emulsions.

[0042] The powder cosmetic of the present invention can be produced by a conventional method used for producing powder cosmetics. The powder cosmetic of the present invention can be used at least on the part that comes into contact with the mask when worn, and may also be used by applying the powder cosmetic with a puff, brush, etc. to the side that comes into contact with the skin when worn. Examples of the form of the powder cosmetic of the present invention include foundation, face powder, body powder, whitening powder, emollient powder, fragrance powder, blusher, face powder, etc. The cosmetic of the present invention may also be in the form of a set with the mask, integrated with the mask by applying the powder cosmetic to the mask in advance, etc.

[0043] From the viewpoint of function, there are various types of masks, such as general-use masks used for the purpose of preventing infection by bacteria, viruses, etc. and blocking pollen, house dust, etc., as well as surgical masks used by medical and hospital personnel, face masks used by people working in clean rooms, food processing sites, etc., and dust masks intended to prevent the inhalation of dust, mist, etc. generated during some work. From the viewpoint of structure, there are various types of masks, such as pleated-type masks in which pleats are formed in the mask body and which can be unfolded in the vertical direction when worn, three-dimensional masks in which a cup-shaped space is formed when the mask body is folded in half along the vertical center line and opened, and molded masks that are molded in advance into a three-dimensional shape such as a cup shape, but the powder cosmetic of the present invention can be used regardless of the type of mask.

[0044] The sheet of the mask body may be a laminated sheet or a single layer, and the material of the mask is not particularly limited, and any nonwoven or woven fabric made of natural fibers, synthetic fibers, or a mixture of these fibers may be used. Natural fibers may be plant fibers such as cotton and hemp, or animal fibers such as wool and silk. On the other hand, synthetic fibers may be polyamide, polyester, polyolefin, polyacrylonitrile, or polyurethane fibers. Examples of the ear loops of the mask are preferably elastically stretchable, and include woven fabrics, nonwoven fabrics, or knitted cords made of round rubber with a circular cross section, flat rubber with a rectangular cross section, urethane fibers, nylon fibers, polyester fibers, polypropylene fibers, etc. EXAMPLES

[0045] The present invention will be described in more detail below with reference to examples. The present invention is not limited to these examples. The blend amounts are in mass % unless otherwise specified. Powder cosmetics were prepared in the usual manner according to the formulations shown in Tables 1 and 2 below, and the water absorption was measured by the following method. Dispersibility was also evaluated according to the following criteria.

[0046] (Water absorption) The prepared powder cosmetic was left to stand for 12 hours at 70° C. Then, in an atmosphere of 25° C., 1 g of the powder cosmetic was precisely weighed out and placed on a glass plate, and ion-exchanged water was gradually dropped into the center of the powder, and each time, the mixture was kneaded with a spatula until it became homogeneous. The end point was when the entire product became paste-like and immediately before it became fluid, and the viscosity was calculated using the following formula. Water absorption (g / 100g) = (ion-exchanged water (g) / amount of sample (g)) x 100

[0047] (Dispersibility evaluation) 3g of the prepared powder cosmetic was placed in a glass test tube and allowed to drop naturally 100 times from a height of 5cm.Then, the test tube was held with its mouth facing down and allowed to drop naturally once from a height of 2cm.Then, the tube was repeatedly dropped, and the number of drops required until all the powder in the glass tube came out was counted and evaluated according to the following criteria. A: 0 to 6 times B: 7~13 times C: 14~20 times D: 21 times or more

[0048] The evaluation results are shown in Tables 1 and 2 along with the formulations. Details of the raw material product names etc. in the table are as follows: *1: SILDEX L-51: Porous silica, average particle size 5μm (manufactured by Asahi Glass Co., Ltd.) *2:CHIFFONSIL P-3R: Non-porous silica, average particle size 10μm (manufactured by JGC Catalysts and Chemicals Co., Ltd.) *3: Mica ST (HS), plate-shaped mica, aspect ratio 30 (manufactured by Topy Industries, Ltd.) *4: KSP-102: Spherical silicone elastomer powder, average particle size 30 μm (manufactured by Shin-Etsu Chemical Co., Ltd.) *5: KSP-100: Spherical silicone elastomer powder, average particle size 5μm (Shin-Etsu Chemical Co., Ltd.) *6: PDM-10L, plate mica, aspect ratio 60 (manufactured by Topy Industries, Ltd.)

[0049] [Table 1]

[0050] [Table 2]

[0051] As shown in Table 1, Example 1 used a powder with a different shape from the porous spherical powder, but had a high water absorption. On the other hand, Comparative Example 1 used Example 1 in which the porous spherical powder was replaced with a non-porous spherical powder, but in this case the water absorption was low. Since makeup run-off is caused by the amount of water absorbed in the mask, it can be assumed that the cosmetic of Example 1 prevents makeup run-off.

[0052] As shown in Table 2, Example 2 used a powder with a different particle size from the porous spherical powder, and Examples 1 and 3 used powders with a different shape from the porous spherical powder, but all had good dispersibility. On the other hand, Comparative Example 2 used only the porous spherical powder, and Comparative Example 3 used a powder with the same particle size as the porous spherical powder, but these had poor dispersibility.

Claims

1. A powder cosmetic to be used at least on a part that comes into contact with a mask when the mask is worn, (A) a porous spherical powder; (B) a powder having a different shape and / or particle size from the porous spherical powder (A); Including, The (A) porous spherical powder is porous spherical silica, and the cosmetic contains the (A) porous spherical silica in an amount of 50 to 99% by mass based on the total amount of the cosmetic, The powder cosmetic has a water absorption capacity of 100 to 180 ml / 100 g.

2. 2. The powder cosmetic according to claim 1, wherein the powder cosmetic contains 65 to 95 mass % of the porous spherical silica (A) based on the total mass of the cosmetic.

3. 3. The powder cosmetic according to claim 1, wherein a mass ratio of said powder (B) to said porous spherical silica (A) is 0.03 to 0.

3.

4. 4. The powder cosmetic according to claim 1, wherein the powder (B) is a plate-like powder or a spherical silicone resin powder.

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