JP7607436B2 - Powder cosmetics - Google Patents

Description

The present invention relates to a powder cosmetic that is applied to at least the areas that come into contact with the mask when it is worn.

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. The powder 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.

Patent Document 1 describes a finishing cosmetic that contains fine cellulose fibers and a polymer with film-forming properties 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.

International Publication No. 2018/221519

Masks have traditionally been used more and more to prevent infection with bacteria and viruses, to block pollen and house dust that can cause bronchitis, asthma, and allergic diseases, and to protect against the cold. When wearing makeup, wearing a mask can cause the makeup to stick to the mask and easily come off. There is also the problem of skin irritation caused by friction between the mask and the skin. In recent years, masks have been used more and more in all seasons to prevent infection, and there is a strong demand for preventing makeup from coming off and skin irritation caused by wearing a mask.

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.

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 powder having a different shape and/or particle size from the porous spherical powder (A);
Including,
The water absorption capacity of the powder cosmetic is 100 to 180 ml/100 g.

(A) The porous spherical powder is preferably porous spherical silica.

It is preferable that the cosmetic contains 50 to 99 mass% of (A) porous spherical silica.

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

(B) The powder is preferably a plate-shaped powder or a spherical silicone resin powder.

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 powder having a different shape and/or particle size from the porous spherical powder (A);
Including,
Since the water absorption capacity of the powder cosmetic is 100 to 180 ml/100 g, makeup run-off and skin irritation caused by wearing a mask can be suppressed.

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 powder having a different shape and/or particle size from the porous spherical powder (A);
Including,
The water absorption capacity of the powder cosmetic is 100 to 180 ml/100 g.

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.

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

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

The material of the (A) porous spherical powder is not particularly limited, but examples thereof include silica (silicic anhydride) and cellulose, with silica being particularly preferred.
Commercially available silica powders that can be used as (A) the porous spherical powder include spherical porous silica (SILDEX L-51, manufactured by Asahi Glass Co., Ltd., specific surface area 300 ^m2 /g, average particle size 5 μm) and spherical porous silica (Spherical Silica P-1500, manufactured by Catalysts & Chemicals Industry Co., Ltd., specific surface area 160 ^m2 /g, average particle size 5 μm). One or more types of (A) the porous spherical powder can be appropriately selected and used.

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

(B) Powder with a different shape and/or particle size from (A) porous spherical powder (hereinafter, simply referred to as (B) powder) means that the shape and/or particle size of the (B) porous spherical powder is different from that of the (A) porous spherical powder, and includes plate-like shapes such as flakes, thin plates, scales, leaflets, mica, and foils, 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 lumpy shapes. Examples of the (B) powder include plate-like powders, spherical powders with a different particle size from the (A) porous spherical powder, rod-like powders, and irregular powders.

Plate-shaped powders are distinguished from spherical powders by having an aspect ratio (average particle size/average thickness) greater than 1, for example at least 5 or more, but 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.

Specific examples 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 it may not be surface-treated.

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 porous spherical powder (A), the size will be different. Examples 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, cellulose, etc. 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).

The spherical powder may be surface-treated. Examples of surface treatments include treatment with a silicone compound, a fluorine-modified silicone compound, a fluorine compound, a higher fatty acid treatment, a higher alcohol treatment, a fatty acid ester treatment, a metal soap treatment, an amino acid treatment, and an alkyl phosphate treatment.

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 is particularly preferably in the range of 3 to 20 μm.

Examples of rod-shaped powders include titanium oxide, titanates, calcium carbonate, silica, alumina, zirconia, and halloysite. 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.

The rod-shaped powder may be a surface-treated powder. Examples of the surface treatment include inorganic treatment with metal oxides such as titania, treatment with amino acids, metal soaps, silane coupling agents, titanium coupling agents, and aluminum coupling agents, treatment with silicones and fluorine compounds, treatment with fatty acids, treatment with oils, treatment with natural products such as polysaccharides, treatment with silk, acylated lysine, keratin, and the like, treatment with resins such as PMMA (polymethyl methacrylate), treatment with plasma, and mechanochemical treatment.

Irregular shaped powders exclude powders that are plate-like, spherical, etc., and examples of such powders 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. Irregular shaped powders may be in any form, such as fine powder or granulated powder. Granulated powder refers to powder that has been compressed or solidified with a binder or the like. Irregular shaped powders may also be surface-treated, like the spherical and rod-shaped powders.

The shape of the powder is measured using the particle size obtained by observation with a transmission electron microscope (TEM) or a scanning electron microscope (SEM). (B) Powder can be used in one or more types selected appropriately.

The mass ratio of (B) powder to (A) porous spherical powder ((B)/(A)) is preferably 0.03 to 0.3. When the mass ratio of (B) powder to (A) porous spherical powder is 0.03 or more, the clumping of (A) porous spherical powder can be further suppressed, and when it is 0.3 or less, makeup run-off and skin irritation can be further suppressed.

(Water absorption amount of powder cosmetic material)
The water absorption of the powder cosmetic of the present invention is 100 to 180 ml/100g. More preferably, it is 105 to 175 ml/100g, and even more preferably, it is 110 to 170 ml/100g. By having a water absorption of 100 ml/100g or more, makeup breakdown caused by wearing a mask can be suppressed, and by having a water absorption of 180 ml/100g 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.
Water absorption (g/100g)=(ion-exchanged water (g)/amount of sample (g))×100

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

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, cocoa 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, dimethicone, glyceryl stearate, and glyceryl stearate. Examples of such synthetic oil components include 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 rubber that can form a three-dimensional network structure.

Examples of the ultraviolet absorber include benzoic acid-based ultraviolet absorbers such as para-aminobenzoic acid, para-aminobenzoic acid monoglycerol ester, N,N-dipropoxy para-aminobenzoic acid ethyl ester, and N,N-dimethyl para-aminobenzoic acid ethyl ester; anthranilic acid-based ultraviolet absorbers such as homomenthyl-N-acetylanthranilate; amyl salicylate, homomenthyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, and p-isopropanol phenyl salicylate. salicylic acid-based ultraviolet absorbers such as octyl cinnamate, ethyl 4-isopropyl cinnamate, methyl 2,5-diisopropyl cinnamate, ethyl 2,4-diisopropyl cinnamate, propyl p-methoxy cinnamate, isoamyl p-methoxy cinnamate, octyl p-methoxy cinnamate (2-ethylhexyl p-methoxy cinnamate), 2-ethoxyethyl p-methoxy cinnamate, 2-ethylhexyl α-cyano-β-phenyl cinnamate, glyceryl cinnamic acid-based ultraviolet absorbers such as mono-2-ethylhexanoyl-di-p-methoxycinnamate; 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; Examples of infrared radiation absorbers include 3-(4'-methylbenzylidene)-d,l-camphor, 3-benzylidene-d,l-camphor, urocanic acid, urocanic acid ethyl ester, 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.

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 ester, etc.; propylene glycol fatty acid esters such as propylene glycol monostearate, etc.; hydrogenated castor oil derivatives; and glycerin alkyl ethers.

Examples of anionic surfactants 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, phosphate salts 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 lauroyl monoethanolamide succinate, N-palmitoyl aspartic acid, ditriethanolamine, and coconut oil fatty acid collagen hydrolyzed alkali salts.

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-N-N-dimethyl-N-ethylammonioethyl acrylate vinylpyrrolidone chloride copolymers, etc.

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 dimethylaminoacetate betaine, alkyl betaine, amido betaine, and sulfobetaine.

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

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.

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.

Other powder components may include extender pigments and powders other than those specified in the present invention as (A) and (B), such as 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, etc. Examples of 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 synthetic resin emulsions include acrylic resin emulsions and polyvinyl acetate resin emulsions.

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.

In terms of function, there are various types of masks, such as general-use masks used to prevent infection from bacteria and viruses, and to block pollen and house dust, as well as surgical masks used by medical and hospital personnel, face masks used by people working in clean rooms and food processing sites, and dust masks designed to prevent the inhalation of dust, mist, and the like generated during some work. In terms of structure, there are various types of masks, such as pleated masks in which pleats are formed in the mask body and can be expanded in the vertical direction when worn, three-dimensional masks in which a cup-shaped space is formed when the mask body is opened after being folded in half along the vertical center line, 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.

The mask body sheet 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 or hemp, or animal fibers such as wool or 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.

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 cosmetic compositions 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.

(Water absorption amount)
The prepared powder cosmetic was left to stand for 12 hours at 70° C. Thereafter, 1 g of the powder cosmetic was precisely weighed out in an atmosphere of 25° C. 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 endpoint was the time just before the entire mixture became paste-like and fluidized, and the viscosity was calculated using the following formula.
Water absorption (g/100g)=(ion-exchanged water (g)/amount of sample (g))×100

(Dispersibility Evaluation)
3 g of the prepared powder cosmetic was placed in a glass test tube and allowed to drop naturally 100 times from a height of 5 cm. After that, the test tube was held with its mouth facing down and allowed to drop naturally once from a height of 2 cm. The drop was then repeated, 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: 0-6 times B: 7-13 times C: 14-20 times D: 21 times or more

Tables 1 and 2 show the evaluation results together 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 5 μm (manufactured by Asahi Glass Co., Ltd.)
*2: CHIFFONSIL P-3R: non-porous silica, average particle size 10 μm (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 5 μm (manufactured by Shin-Etsu Chemical Co., Ltd.)
*6: PDM-10L, plate-shaped mica, aspect ratio 60 (manufactured by Topy Industries, Ltd.)

As shown in Table 1, Example 1 used a powder with a different shape than 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. Note that makeup breakdown is caused by the amount of water absorbed inside the mask, so it can be assumed that the cosmetic material of Example 1 prevents makeup breakdown.

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 (4)

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. The powder cosmetic according to claim 1, wherein the content of said porous spherical silica (A) is 65 to 95 % by mass based on the total amount of the cosmetic. 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. The powder cosmetic according to claim 1, wherein the powder (B) is a plate-like powder or a spherical silicone resin powder.