Manufacturing method of solid powder cosmetic

Abstract

To provide a method for producing a solid powder cosmetic that has high uniformity of the surface of a molded product and an appropriate amount to be taken when in use even when water is used as dispersion solvent, is very smooth and comfortable, and does not give touch of powder.SOLUTION: A method for producing a solid powder cosmetic containing the following components (A) to (C): (A) coloring pigment by 0.1 mass% or more and 34 mass% or less in the total amount of powder; (B) oil agent by 3 mass% or more and 28 mass% or less for the total amount of powder; and (C) surfactant by 12 mass% or more and 30 mass% or less for the total amount of oil agent, where powder including the component (A) and oil-in-water type emulsion including the components (B), (C) and water are mixed into a slurry state, the mixture is filled into a cosmetic container, and then solvent is sucked to be removed.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a method for producing a solid powder cosmetic preparation. [Background technology]

[0002] There are two methods for manufacturing solid powder cosmetics: the dry method, in which a mixture of powder and oil is compressed and molded into an oil powder bulk, and the wet method, in which a volatile solvent such as water or alcohol is added to the oil powder bulk to make a slurry, which is then filled into a container and the volatile solvent is dried and removed to obtain the cosmetic. Compared to the dry method, the wet method is characterized by more uniform dispersion of the powder and oil, a fine powder texture, and a moist feel when used.

[0003] Volatile hydrocarbons and low-boiling alcohols are commonly used as dispersion solvents in the wet method, but in recent years, methods using water as a solvent have been reported due to growing environmental awareness. However, when using water to prepare a slurry, it is difficult to uniformly disperse the oil, and the oil dispersion state of the resulting product is non-uniform from the surface to the inside, posing problems in usability and uniformity of the molded product.

[0004] As a method for improving the dispersibility of oils even when water is used as a dispersion solvent, a method has been reported in which an oily component is first made into an oil-in-water emulsion composition, which is then mixed with powder to form a slurry, which is then filled into a container, and the water is then dried to remove, thereby obtaining a solid powder cosmetic (Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2009-242282 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, the solid powder cosmetic preparation obtained by the method of Patent Document 1 mentioned above has problems such as the surface of the molded product being prone to becoming uneven when dried, resulting in uneven removal of the product when used, the surface of the molded product being hard, and the powder clumping together, resulting in a powdery feel when used. Therefore, the present invention relates to a method for producing a solid powder cosmetic which has a highly uniform surface, comes off in just the right amount during use, and is very smooth and comfortable without a powdery feel, even when water is used as a dispersion solvent. [Means for solving the problem]

[0007] In view of the above, the present inventors have investigated the cosmetic filling process to solve the above problems, and have found that the key lies in the composition of the oil-in-water emulsion prepared using water as a dispersion solvent before mixing with the powder, and in the process of removing the solvent. That is, they have found that by mixing an oil-in-water emulsion prepared using a specific amount of surfactant with a powder cosmetic base to form a slurry, filling a cosmetic container, and then removing the solvent by suction, it is possible to obtain a solid powder cosmetic with a highly uniform surface, an appropriate amount of removal during use, and a very smooth, comfortable texture without a powdery feel, and have completed the present invention.

[0008] That is, the present invention provides the following components (A) to (C): (A) Color pigment: 0.1% by mass or more and 34% by mass or less of the total powder amount; (B) oil agent: 3% by mass or more and 28% by mass or less based on the total amount of powder, and (C) Surfactant: 12% by mass or more and 30% by mass or less based on the total amount of oil The present invention provides a method for producing a solid powder cosmetic comprising the steps of: mixing a powder containing the component (A) with an oil-in-water emulsion containing the components (B) and (C) and water to form a slurry; filling the slurry into a cosmetic container; and then removing the solvent by suction. Effect of the Invention

[0009] According to the present invention, it is possible to produce a solid powder cosmetic product which has a highly uniform surface, comes off in just the right amount during use, and is very smooth and comfortable, without the feeling of powder. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The solid powder cosmetic preparation produced by the method of the present invention contains the following components (A) to (C). (A) Color pigment: 0.1% by mass or more and 34% by mass or less of the total powder amount; (B) oil agent: 3% by mass or more and 28% by mass or less based on the total amount of powder; (C) Surfactant: 12% by mass or more and 30% by mass or less based on the total amount of the oil. In this specification, the content of a component is expressed as a mass ratio when the mass of the reference substance is taken as 100, and the unit is expressed in "mass %".

[0011] The solid powder cosmetic preparation of the present invention contains (A) a powder containing a color pigment. The powder used in the present invention is not limited as long as it is one that is commonly used in cosmetics, and includes extender pigments, luster pigments, and the like in addition to the (A) coloring pigment.

[0012] Examples of the color pigment (A) include metal oxides such as titanium oxide, zinc 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 color.

[0013] Examples of the extender pigment include inorganic pigments such as silicic acid, silicic acid anhydride, magnesium silicate, talc, sericite, boron nitride, mica, synthetic mica, glass flakes, synthetic phlogopite, kaolin, clay, bentonite, bismuth oxychloride, zirconium oxide, magnesium oxide, aluminum oxide, calcium sulfate, barium sulfate, magnesium sulfate, calcium carbonate, magnesium carbonate, aluminum silicate, magnesium silicate, silica, and alumina, as well as composite powders of these.

[0014] Luster pigments that can be used include plate-like powders such as mica, synthetic phlogopite, glass, silica, alumina, etc., the surface of which is coated with colorants such as titanium oxide, iron oxide, silicon oxide, Prussian blue, chromium oxide, tin oxide, chromium hydroxide, gold, silver, carmine, organic pigments, etc., as well as film rolls cut into any shape such as polyethylene terephthalate-polymethyl methacrylate laminated powder, polyethylene terephthalate-aluminum vapor-deposited powder, and polyethylene terephthalate-gold vapor-deposited laminated powder.

[0015] Further, organic powders such as polyethylene powder, polypropylene powder, polymethyl methacrylate powder, nylon powder, polytetrafluoroethylene powder, silicone powder, silicone rubber powder, silk powder, urethane powder, cellulose powder, starch powder, and polyethylene fluoride; inorganic powders such as silica, magnesium carbonate, and calcium carbonate; acylated lysine powders such as lauroyl lysine; and metal soap powders which are higher fatty acid metal salts can be used.

[0016] Moreover, from the viewpoints of improving the dust removal properties of the solid powder cosmetic and improving spreadability on the skin, the above-mentioned organic powder and inorganic powder are preferably spherical powders, and it is more preferable to use the spherical powder in combination with at least one pigment selected from the group consisting of an extender pigment, a color pigment, and a high brilliance pigment.

[0017] There are no limitations on the size, shape, etc. of these powders, and they can be used as they are, or can be subjected to a hydrophobic or hydrophilic treatment by a conventional method before use. The hydrophobization treatment is not limited as long as it is a treatment that is performed on ordinary cosmetic powders, and a dry treatment, a wet treatment, or the like may be performed using a surface treatment agent such as a fluorine compound, a silicone compound, a metal soap, an amino acid compound, lecithin, an alkylsilane, an oil agent, or an organic titanate. Specific examples of surface treatment agents include fluorine-based compounds such as perfluoropolyether, perfluoroalkyl phosphate ester, perfluoroalkylalkoxysilane, and fluorine-modified silicone; silicone-based compounds such as dimethylpolysiloxane, methylhydrogenpolysiloxane, cyclic silicone, organopolysiloxane modified with trialkoxy groups at one or both ends, crosslinked silicone, silicone resin, fluorine-modified silicone resin, and acrylic-modified silicone; metal stones such as aluminum stearate, aluminum myristate, zinc stearate, and magnesium stearate. Examples of suitable surfactants include soaps; amino acid compounds such as proline, hydroxyproline, alanine, glycine, sarcosine, glutamic acid, aspartic acid, lauroyl lysine, lysine and their derivatives, and acylated amino acids; lecithin, hydrogenated lecithin; alkyl silanes such as methyltrimethoxysilane, ethyltrimethoxysilane, hexyltrimethoxysilane, octyltriethoxysilane, octyltriethoxysilane, and triethoxycaprylylsilane; oils such as polyisobutylene, waxes, oils and fats, and fatty acids; and organic titanates such as isopropyl triisostearoyl titanate.

[0018] The hydrophilization treatment is not limited as long as it is a treatment that is applied to ordinary cosmetic powders. For example, plant-based polymers such as gum arabic, tragacanth, arabinogalactan, locust bean gum (carob gum), guar gum, karaya gum, carrageenan, pectin, agar, quince seed, starch (rice, corn, potato, wheat), algae colloid, trant gum, and locust bean gum; microbial polymers such as xanthan gum, dextran, succinoglucan, and pullulan; animal polymers such as collagen, casein, albumin, deoxyribonucleic acid (DNA) and its salts; and carboxymethyl dextran. Examples of suitable cellulose-based polymers include starch, methyl hydroxypropyl starch, and other starch-based polymers; cellulose-based polymers such as methyl cellulose, ethyl cellulose, methyl hydroxypropyl cellulose, carboxymethyl cellulose, hydroxymethyl cellulose, hydroxypropyl cellulose, nitrocellulose, sodium cellulose sulfate, sodium carboxymethyl cellulose, crystalline cellulose, and cellulose powder; alginic acid-based polymers such as sodium alginate and propylene glycol alginate; vinyl-based polymers such as polyvinyl methyl ether, polyvinylpyrrolidone, and carboxyvinyl polymer; polyoxyethylene-based polymers such as polyethylene glycol and polyethylene glycol silane; polyoxyethylene-polyoxypropylene copolymer-based polymers; acrylic-based polymers such as sodium polyacrylate, polyethyl acrylate, and polyacrylic acid amide, as well as inorganic silicic acid-based compounds such as silica.

[0019] The powder preferably contains a hydrophobic powder from the viewpoints of powder removal, spreadability upon application, and cosmetic durability, and more preferably is surface-treated with a fluorine compound, a silicone compound, a metal soap, an amino acid compound, lecithin, an alkylsilane, an oil, an organic titanate, or the like.

[0020] When the powder contains the above-mentioned hydrophobic powder, the hydrophobic powder preferably accounts for 10% by mass or more of the total powder, more preferably 30% by mass or more, and even more preferably 50% by mass or more, and is preferably 100% by mass or less, more preferably 95% by mass or less, and even more preferably 90% by mass or less, in order to provide a very smooth and comfortable powdery feel.

[0021] The powders can be used alone or in combination of two or more kinds. The total content of the powders in the solid powder cosmetic of the present invention is, from the viewpoints of spreadability upon application, moist feeling upon application, and cosmetic durability, preferably from 70% by mass to 95% by mass, more preferably from 72% by mass to 92% by mass, even more preferably from 74% by mass to 90% by mass, and even more preferably from 75% by mass to 85% by mass.

[0022] The (A) color pigment is preferably contained in an amount of 0.1% by mass or more and 34% by mass or less of the total amount of powder, from the viewpoint of obtaining a solid powder cosmetic that comes off in just the right amount upon use and that is very smooth and comfortable and does not feel like powder to the touch. More preferably, it is 0.2 mass% or more, even more preferably 0.3 mass% or more, even more preferably 0.5 mass% or more, even more preferably 1.0 mass% or more, even more preferably 2 mass% or more, and more preferably 40 mass% or less, even more preferably 36 mass% or less, even more preferably 30 mass% or less, and even more preferably 25 mass% or less.

[0023] It is preferable for the extender pigment to be contained in an amount of 5% by mass or more and 95% by mass or less of the total powder, from the viewpoints of obtaining a solid powder cosmetic which has high moldability, high surface uniformity of the molded product, an appropriate amount of removal upon use, and which is very smooth and comfortable without the feeling of powder. From the viewpoints of moldability and of obtaining a solid powder cosmetic preparation that is very smooth and comfortable and does not feel like powder to the touch, the content is more preferably 10% by mass or more, even more preferably 15% by mass or more, and even more preferably 20% by mass, and from the viewpoint of increasing the uniformity of the surface of the molded product, the content is more preferably 85% by mass or less, even more preferably 75% by mass or less, and even more preferably 65% ​​by mass or less.

[0024] The amount of the glittering pigment in the total powder is preferably 0% by mass or more and 95% by mass or less, from the viewpoint of obtaining a solid powder cosmetic product that has a high uniformity of the surface of the molded product, has an appropriate amount of removal during use, and is very smooth and comfortable without a powdery feel. From the viewpoint of increasing the uniformity of the surface of the molded product, the amount is more preferably 5% by mass or more, even more preferably 10% by mass or more, and even more preferably 20% by mass or more, and from the viewpoint of moldability, the amount is more preferably 85% by mass or less, even more preferably 75% by mass or less, and even more preferably 65% ​​by mass or less.

[0025] The solid powder cosmetic preparation of the present invention contains an oil (B). Examples of the oil agent of component (B) include hydrocarbon oils, ester oils, ether oils, silicone oils, and higher alcohols having 10 to 24 carbon atoms.

[0026] More specifically, examples of the hydrocarbon oil include squalane, liquid paraffin, liquid isoparaffin, heavy liquid isoparaffin, etc. Among these hydrocarbon oils, from the viewpoint of obtaining a solid powder cosmetic product that has a high surface uniformity of a molded product, that comes off in just the right amount upon use, and that is very smooth and comfortable without a powdery feel, it is preferable to include at least one or more types selected from liquid paraffin, liquid isoparaffin, and squalane, and it is more preferable to include at least one type selected from liquid isoparaffin and squalane.

[0027] Ester oils include monoester oils, diester oils, triester oils and tetraester oils. Examples of monoester oils include monoesters of aliphatic or aromatic monocarboxylic or dicarboxylic acids having 2 to 24 carbon atoms. Specific examples include cetyl 2-ethylhexanoate, cetyl octanoate, isononyl isononanoate, isotridecyl isononanoate, hexyl laurate, isopropyl myristate, octyldodecyl myristate, myristyl myristate, 2-hexyldecyl myristate, isopropyl palmitate, octyl palmitate, 2-hexyldecyl palmitate, butyl stearate, isocetyl stearate, isocetyl isostearate, decyl oleate, isodecyl benzoate, octyl methoxycinnamate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, 2-ethylhexyl succinate, 2-hexyldecyl adipate, and alkyl benzoates (C12 to C15). Among these, from the viewpoint of obtaining a solid powder cosmetic product which has a high degree of surface uniformity in a molded product, which comes off in just the right amount during use, and which is very smooth and comfortable and does not feel like powder, it is preferable to include at least one or more types selected from cetyl ethylhexanoate, isononyl isononanoate, isotridecyl isononanoate, isopropyl myristate, and octyl methoxycinnamate, it is more preferable to include at least one or more types selected from cetyl ethylhexanoate, isononyl isononanoate, and isotridecyl isononanoate, and even more preferable to include at least one or more types selected from cetyl ethylhexanoate and isononyl isononanoate.

[0028] Examples of diester oils include diesters of dicarboxylic acids having 3 to 18 carbon atoms and difatty acid esters of polyhydric alcohols. Specific examples include propylene glycol dicaprylate, neopentyl glycol dicaprate, glycol distearate, propylene glycol diisostearate, glyceryl diisostearate, glyceryl monomyristate monoisostearate, glycerin di-2-heptylundecanoate, di-2-ethylhexyl succinate, diisopropyl sebacate, diisostearyl malate, ethylene glycol di-2-ethylhexanoate, diisobutyl adipate, di-2-heptylundecyl adipate, and di-2-ethylhexyl sebacate. Among these, from the viewpoint of obtaining a solid powder cosmetic preparation which has a high degree of surface uniformity in a molded product, comes off in just the right amount during use, is very smooth and comfortable, and does not feel like powder to the touch, it is preferable to contain at least one or two or more selected from propylene glycol dicaprylate, neopentyl glycol dicaprate, glycol distearate, diisostearyl malate, and propylene glycol diisostearate, it is more preferable to contain at least one or two or more selected from propylene glycol dicaprylate, neopentyl glycol dicaprate, and diisostearyl malate, it is even more preferable to contain at least one or two or more selected from neopentyl glycol dicaprate and diisostearyl malate, and it is even more preferable to contain diisostearyl malate.

[0029] Examples of triester oils include tri-fatty acid esters of trihydric or higher polyhydric alcohols, and specific examples thereof include glycerin trimyristate, glycerin triisopalmitate, glycerin tri-2-heptylundecanoate, trimethylolpropane triethylhexanoate, trimethylolpropane trioctanoate, tri(capryl / capric)glycerin, trioleate, glycerin tri-2-ethylhexanoate, glycerin triisostearate, olive oil, jojoba oil, etc. Among these, from the viewpoint of obtaining a solid powder cosmetic product that has a high surface uniformity of a molded product, has an appropriate amount of removal during use, is very smooth, comfortable, and does not feel like powder, it is preferable to include at least one or more selected from tri(capryl / capric)glycerin, trioleate, glycerin tri-2-ethylhexanoate, and glycerin triisostearate, and tri(capryl / capric)glycerin is more preferable.

[0030] Examples of tetraester oils include tetra-fatty acid esters of polyhydric alcohols having 4 or more valences, and specific examples thereof include pentaerythritol tetra(behenic acid / benzoic acid / ethylhexanoic acid), pentaerythritol tetraethylhexanoate, pentaerythritol tetraoctanoate, and pentaerythritol tetra-2-ethylhexanoate. Among these, from the viewpoint of obtaining a solid powder cosmetic product having a high surface uniformity of a molded product, an appropriate amount of removal during use, and which is very smooth and comfortable and does not feel like powder, it is preferable to include at least one or more selected from pentaerythritol tetraethylhexanoate, pentaerythritol tetraoctanoate, and pentaerythritol tetra-2-ethylhexanoate, and more preferably to include pentaerythritol tetraethylhexanoate.

[0031] Examples of ether oils include dialkyl ethers, specifically dihexyl ether, dicaprylyl ether, cetyl-1,3-dimethylbutyl ether, etc. Among these, from the viewpoint of obtaining a solid powder cosmetic product that has a high surface uniformity of a molded product, has an appropriate amount of removal upon use, is very smooth and comfortable, and does not feel like powder, it is preferable to contain at least one or more selected from dicaprylyl ether and cetyl-1,3-dimethylbutyl ether, and more preferably to contain cetyl-1,3-dimethylbutyl ether.

[0032] Examples of silicone oils include crosslinked methylpolysiloxane, network methylpolysiloxane, dimethylpolysiloxane, methyltrimethicone, dimethylcyclopolysiloxane, methylphenylpolysiloxane such as diphenylsiloxyphenyltrimethicone, higher alcohol-modified organopolysiloxane, etc. Among these, from the viewpoint of obtaining a solid powder cosmetic product that has a high surface uniformity of a molded product, that comes off in an appropriate amount during use, and that is very smooth and comfortable and does not feel like powder, it is preferable to contain at least one or more types selected from dimethylpolysiloxane, methyltrimethicone, dimethylcyclopolysiloxane, and methylphenylpolysiloxane, more preferably to contain at least one or more types selected from dimethylpolysiloxane, methyltrimethicone, and methylphenylpolysiloxane, and even more preferably to contain at least one or more types selected from dimethylpolysiloxane, methyltrimethicone, and diphenylsiloxyphenyltrimethicone. Even more preferably, the silicone oil comprises a volatile silicone oil. Examples of volatile silicone oils include linear dimethylpolysiloxanes such as dimethylpolysiloxane (1cs), dimethylpolysiloxane (1.5cs), and dimethylpolysiloxane (2cs); branched siloxanes such as methyltrimethicone, tris(trimethylsilyl)methylsilane, and tetrakis(trimethylsilyl)silane; and cyclic dimethylsiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane. It is preferable to contain at least one or two or more types selected from linear dimethylpolysiloxanes and branched siloxanes, and it is more preferable to contain at least one or two or more types selected from dimethylpolysiloxane (1.5cs) and methyltrimethicone.

[0033] From the viewpoints of the stability of the oil-in-water emulsion, the stability of the slurry, and the like, the higher alcohol having 10 to 24 carbon atoms preferably includes at least one or more types selected from higher alcohols having 12 to 22 carbon atoms, more preferably includes at least one or more types selected from higher alcohols having 16 to 22 carbon atoms, even more preferably includes at least one or more types selected from higher alcohols having 18 to 22 carbon atoms, and even more preferably includes at least one or more types selected from higher alcohols having 18 and 22 carbon atoms.

[0034] From the viewpoint of obtaining a solid powder cosmetic product which has a high degree of surface uniformity on a molded article, which comes off in just the right amount upon use, and which is very smooth and comfortable and does not feel like powder, it is preferable for the oil agent of component (B) to contain at least one or more types selected from ester oils and silicone oils, more preferably at least one or more types selected from monoester oils, diester oils and silicone oils, and even more preferably at least one or more types selected from monoester oils, diester oils, dimethylpolysiloxanes, methyltrimethicones and methylphenylpolysiloxanes. As the oil agent of component (B), from the viewpoint of obtaining a solid powder cosmetic product that has high surface uniformity on the molded product, that comes off in just the right amount upon use, and that is very smooth and comfortable without a powdery feel, it is preferable that the oil agent be one that is liquid at 25° C. Furthermore, it is more preferable that the oil agent contain at least a volatile silicone oil.

[0035] The content of component (B) relative to the total powder amount is 3% by mass or more and 28% by mass or less, but from the viewpoint of obtaining a solid powder cosmetic having a high surface uniformity of the molded product, an appropriate amount of removal during use, and a very smooth and comfortable feeling without a powdery feel, it is preferably 5% by mass or more and 27% by mass or less. Also, from the viewpoint of obtaining a solid powder cosmetic having good moldability, an appropriate amount of removal during use, and a very smooth and comfortable feeling without a powdery feel, it is more preferably 7% by mass or more, even more preferably 10% by mass or more, even more preferably 14% by mass or more, and even more preferably 18% by mass or more. Also, from the viewpoint of obtaining a solid powder cosmetic having a high surface uniformity of the molded product, an appropriate amount of removal during use, and a very smooth and comfortable feeling without a powdery feel, it is more preferably 28% by mass or less.

[0036] From the viewpoint of slurry stability, it is preferable that the surfactant of component (C) contains a nonionic surfactant. Examples of the surfactant of component (C) include nonionic surfactants other than silicone-based surfactants and silicone-based nonionic surfactants.

[0043] The nonionic surfactants other than silicone-based surfactants are not limited as long as they are used in ordinary cosmetics, and examples thereof include sorbitan fatty acid esters such as sorbitan monoisostearate, glycerin fatty acid esters, polyglycerin fatty acid esters, propylene glycol fatty acid esters, polyethylene glycol fatty acid esters, sucrose fatty acid esters, polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene alkyl ethers, polyoxyethylene sorbitol fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyoxyethylene propylene glycol fatty acid esters, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene hydrogenated castor oil fatty acid esters, polyoxyethylene phytostanol ether, polyoxyethylene phytosterose ether, polyoxyethylene cholestanol ether, polyoxyethylene cholesteryl ether, and the like. Examples of silicone-based nonionic surfactants include linear or branched polyether-modified silicones such as polyoxyethylene-methylpolysiloxane copolymers and polyoxyethylene-polydimethylsiloxyethyl dimethicone (specifically, PEG-9 polydimethylsiloxyethyl dimethicone); alkyl-modified polyether-modified silicones (specifically, cetyl PEG / PPG-10 / 1 dimethicone); and alkyl-chain-co-modified polyether-modified silicones such as alkyl-modified polyoxyethylene-polydimethylsiloxyethyl dimethicone (specifically, lauryl PEG-9 polydimethylsiloxyethyl dimethicone).

[0037] Among these, from the viewpoint of obtaining a solid powder cosmetic product that has high stability of an oil-in-water emulsion, high stability of a slurry, uniformity of the surface of a molded product, and has an appropriate amount of removal during use, is very smooth and comfortable, and does not feel like powder, it is preferable to contain at least one or more selected from sorbitan fatty acid esters, linear or branched polyether-modified silicones, alkyl-modified polyether-modified silicones, and alkyl-modified polyoxyethylene-polydimethylsiloxyethyl dimethicones, more preferably to contain at least one or more selected from sorbitan fatty acid esters, linear or branched polyether-modified silicones, and alkyl-modified polyether-modified silicones, and more preferably to contain at least one or more selected from sorbitan fatty acid esters and alkyl-modified polyether-modified silicones. It is also preferable to use a silicone-based nonionic surfactant in combination with a nonionic surfactant other than a silicone-based surfactant.

[0038] From the viewpoint of obtaining a solid powder cosmetic preparation that has high stability of an oil-in-water emulsion, high stability of a slurry, high surface uniformity of a molded product, and which comes off in just the right amount upon use and is very smooth and comfortable without a powdery feel, these nonionic surfactants preferably have an HLB value of 3.5 to 16, more preferably 7 to 14, and even more preferably 8 to 12. Here, HLB (Hydrophilic-Lipophilic Balance) indicates the molecular weight of the hydrophilic group portion in the total molecular weight of the surfactant, and for nonionic surfactants, it is calculated by Griffin's formula. The HLB of a mixed surfactant consisting of two or more nonionic surfactants is calculated as follows. The HLB of a mixed surfactant is the phase arithmetic average of the HLB values ​​of each nonionic surfactant based on their blending ratio. Mixed HLB=Σ(HLBx×Wx) / ΣWx HLBx indicates the HLB value of the nonionic surfactant X. Wx indicates the weight (g) of the nonionic surfactant X having the value of HLBx.

[0039] When a nonionic surfactant other than silicone-based surfactant and a nonionic surfactant based on silicone are used in combination as component (C), the mass ratio of the silicone-based nonionic surfactant to the nonionic surfactant based on silicone-based surfactant is preferably (nonionic surfactant based on silicone-based surfactant) / (nonionic surfactant based on silicone-based surfactant)=0.5 to 20, more preferably 1 to 10, and even more preferably 2 to 5, from the viewpoints of obtaining stability of the oil-in-water emulsion, stability of the slurry, and a uniform appearance, and suppressing separation and decrease in viscosity after storage.

[0040] The content of component (C) relative to the total amount of oil is preferably 12% by mass or more and 30% by mass or less, from the viewpoint of obtaining a solid powder cosmetic having high stability of the oil-in-water emulsion, high stability of the slurry, high uniformity of the surface of the molded product, just the right amount of removal during use, and very smooth and comfortable without a powdery feel. Also, from the viewpoint of stability of the oil-in-water emulsion and high stability of the slurry, it is more preferably 12.5% ​​by mass or more, even more preferably 13% by mass or more, even more preferably 13.5% by mass or more, and even more preferably 14% by mass or more, and from the viewpoint of obtaining a solid powder cosmetic having high uniformity of the surface of the molded product, just the right amount of removal during use, and very smooth and comfortable without a powdery feel, it is preferably 25% by mass or less, even more preferably 20% by mass or less.

[0041] The content of component (C) relative to the total powder amount is preferably 0.9% by mass or more and 3.9% by mass or less, from the viewpoint of obtaining a solid powder cosmetic with high stability of the oil-in-water emulsion, high stability of the slurry, high uniformity of the surface of the molded product, just the right amount of removal during use, very smooth and comfortable, and no powdery feel. Also, from the viewpoint of stability of the oil-in-water emulsion and high stability of the slurry, it is more preferably 1.4% by mass or more, even more preferably 2.0% by mass or more, and even more preferably 2.5% by mass or more, and from the viewpoint of obtaining a solid powder cosmetic with high uniformity of the surface of the molded product, just the right amount of removal during use, very smooth and comfortable, and no powdery feel, it is preferably 4.5% by mass or less, more preferably 4.0% by mass or less, and even more preferably 3.5% by mass or less.

[0042] The content of component (C) relative to the total amount of oil and total powder is preferably 0.8% by mass or more and 3.5% by mass or less, from the viewpoint of obtaining a solid powder cosmetic having high surface uniformity of the oil-in-water emulsion, high slurry stability, a good amount of removal during use, and a very smooth and comfortable texture without a powdery feel. Also, from the viewpoint of obtaining a solid powder cosmetic having high surface uniformity of the molded product, a good amount of removal during use, and a very smooth and comfortable texture without a powdery feel, it is more preferably 1.0% by mass or more, even more preferably 1.3% by mass or more, even more preferably 1.7% by mass or more, even more preferably 2.0% by mass or more, and more preferably 3.2% by mass or less, and even more preferably 3.0% by mass or less.

[0043] The solid powder cosmetic of the present invention may contain, in addition to the above-mentioned powder, oil and surfactant, polyhydric alcohols, water-soluble polymers, cosmetic ingredients, fragrances, preservatives, ultraviolet absorbers, antioxidants and the like.

[0044] The solid powder cosmetic of the present invention is characterized in that a powder containing the component (A) is mixed with an oil-in-water emulsion containing the components (B) and (C) and water as a solvent to form a slurry, which is then filled into a cosmetic container and the solvent is removed by suction. Conventional methods for producing solid powder cosmetic products involve first mixing the powder containing the component (A) with the component (B) oil and homogenizing it, and then dispersing it in a solvent, but by using the method of the present invention, a solid powder cosmetic can be produced that has a highly uniform surface of a molded product, comes off in just the right amount during use, and is very smooth and has an excellent feel when used. First, the process for obtaining an oil-in-water emulsion containing the components (B), (C) and water will be described. The amount of water used when preparing an oil-in-water emulsion is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 65% ​​by mass or more, preferably 90% by mass or less, more preferably 85% by mass or less, even more preferably 82% by mass or less, even more preferably 78% by mass or less, and even more preferably 75% by mass or less, from the viewpoint of handling during preparation and stability of the emulsion. The emulsion of the present invention uses water as a solvent, but may contain a water-soluble organic solvent within a range that does not inhibit emulsification. When a water-soluble organic solvent is contained, it is preferably 10% by mass or less, more preferably 5% by mass or less, and even more preferably 0% by mass, from the viewpoint of not inhibiting emulsification. The apparatus for producing the oil-in-water emulsion is not particularly limited as long as it can produce a uniform oil-in-water emulsion, and it is preferable to use an emulsifying apparatus having a homomixer or a dispersing blade. From the viewpoint of improving the emulsion dispersion and reducing the load during production, the peripheral speed of the tip of the agitating blade of the mixer during emulsification is preferably 1 m / s or more, more preferably 3 m / s or more, even more preferably 5 m / s or more, and preferably 30 m / s or less, more preferably 25 m / s or less, and even more preferably 20 m / s or less. From the viewpoint of improving emulsification and dispersion and reducing the load during production, the stirring time is preferably 1 minute or more, more preferably 3 minutes or more, and even more preferably 5 minutes or more, and is preferably 90 minutes or less, more preferably 75 minutes or less, and even more preferably 60 minutes or less. From the viewpoints of improving emulsification and dispersion and reducing the load during production, the stirring temperature is preferably 15°C or higher, more preferably 20°C or higher, and even more preferably 25°C or higher, and is preferably 90°C or lower, more preferably 80°C or lower, and even more preferably 70°C or lower.

[0045] Next, the powder containing the component (A) is mixed with the oil-in-water emulsion to form a slurry. This step can be carried out using any mixing device capable of uniformly mixing the emulsion and the powder, and a high-speed dispersing machine such as a homodisper having a dispersing blade can be used. From the viewpoint of improving emulsification and dispersion and reducing the load during production, the peripheral speed of the tip of the agitator blade during mixing is preferably 1 m / s or more, more preferably 3 m / s or more, and even more preferably 5 m / s or more, and is preferably 30 m / s or less, more preferably 25 m / s or less, and even more preferably 20 m / s or less. From the viewpoint of improving emulsification and dispersion and reducing the load during production, the stirring time is preferably 1 minute or more, more preferably 3 minutes or more, and even more preferably 5 minutes or more, and is preferably 120 minutes or less, more preferably 75 minutes or less, and even more preferably 60 minutes or less. From the viewpoints of improving emulsification and dispersion and reducing the load during production, the stirring temperature is preferably 15°C or higher, more preferably 20°C or higher, and even more preferably 25°C or higher, and is preferably 90°C or lower, more preferably 80°C or lower, and even more preferably 70°C or lower.

[0046] The obtained slurry is filled into a cosmetic container, and the solvent is removed by suction. When an organic solvent is used as the solvent, it is preferable to remove the solvent by suction from the viewpoint of safety and from the viewpoint of preventing the oily agent from being localized on the surface of the molded product due to capillary action together with the solvent when only drying is performed. However, when water is used as the solvent, there is no need to remove the solvent by suction since there is no such problem. In addition, it was technically common knowledge among those skilled in the art that when an emulsion system is used, the oily agent is also easily removed when attempting to remove the solvent by suction. On the other hand, in the present invention, it has been found that when water is used as a solvent, the hardness of the cosmetic increases and the resistance to disintegration is improved by pressing while removing the solvent by suction, and therefore the present invention is characterized in that the solvent is removed by suction. The cosmetic container used is a container suitable for the desired solid powder cosmetic product. The filling method is not particularly limited, and may be either front filling or back filling. The timing of suction removal of the solvent may be such that the solvent is suctioned and removed after the completion of filling the cosmetic container with the slurry, or the cosmetic container may be filled with the solvent while suctioning and removing the solvent. Here, the degree of vacuum during suction removal of the solvent is preferably -5 kPa or more and 80 kPa or less from the viewpoints of solvent removal efficiency and load on the equipment during production. From the viewpoints of solvent removal efficiency, load on the equipment during production, and drop resistance strength of the product, it is preferable to perform suction removal until the solvent content after solvent removal is 10% or more and 25% or less. In addition, from the viewpoints of solvent removal efficiency and load on the equipment during production, the solvent content is more preferably 12% or more, even more preferably 15% or more, even more preferably 19% or more, even more preferably 20% or more, and even more preferably 24% or less, and even more preferably 23% or less. The solvent content is measured by the method described in the examples.

[0047] Furthermore, if necessary, it is preferable to dry the solid powder cosmetic. The drying method is not particularly limited, and natural drying is acceptable, but hot air drying and vacuum drying are preferably used. From the viewpoints of drying efficiency, the load on the equipment during production, and thermal degradation of the product, the drying temperature is preferably 20°C or higher, more preferably 25°C or higher, and even more preferably 30°C or higher, and is preferably 95°C or lower, more preferably 90°C or lower, and even more preferably 85°C or lower. The moisture content (moisture content) in the solid powder cosmetic after drying is preferably 0.01 to 1.0 mass %, more preferably 0.05 to 0.8 mass %, and even more preferably 0.1 to 0.5 mass %, from the viewpoints of the amount removed during use and drop resistance.

[0048] The solid powder cosmetic preparations obtainable by the method of the present invention include make-up cosmetics such as eye color, foundation, blusher, eyeliner, face powder, and lipstick.

[0049] In relation to the above-mentioned embodiment, the present invention further discloses the following manufacturing method.

[0050] <1> The following components (A) to (C): (A) Color pigment: 0.1% by mass or more and 34% by mass or less of the total powder amount; (B) Oil: 5% by mass or more and 27% by mass or less based on the total amount of powder; (C) Surfactant: 12.5% ​​by mass or more and 25% by mass or less based on the total amount of oil The method for producing a solid powder cosmetic comprising the steps of: mixing a powder containing the component (A) with an oil-in-water emulsion containing the components (B), (C) and water to form a slurry; filling the slurry into a cosmetic container; and removing the solvent by suction. <2> The following components (A) to (C): (A) Color pigment: 0.1% by mass or more and 34% by mass or less of the total powder amount; (B) Oil: 5% by mass or more and 27% by mass or less based on the total amount of powder; (C) Surfactant: 12% by mass or more and 30% by mass or less based on the total amount of oil, and 0.8% by mass or more and 3.5% by mass or less based on the total amount of oil and powder The method for producing a solid powder cosmetic comprising the steps of: mixing a powder containing the component (A) with an oil-in-water emulsion containing the components (B), (C) and water to form a slurry; filling the slurry into a cosmetic container; and removing the solvent by suction. <3> The following components (A) to (C): (A) Color pigment: 0.1% by mass or more and 34% by mass or less of the total powder amount; (B) Oil: 5% by mass or more and 27% by mass or less based on the total amount of powder; (C) Surfactant: 12% by mass or more and 30% by mass or less based on the total amount of oils, and 0.9% by mass or more and 3.9% by mass or less based on the total amount of powders The method for producing a solid powder cosmetic comprising the steps of: mixing a powder containing the component (A) with an oil-in-water emulsion containing the components (B), (C) and water to form a slurry; filling the slurry into a cosmetic container; and removing the solvent by suction. <4> The following components (A) to (C): (A) Color pigment: 0.1% by mass or more and 34% by mass or less of the total powder amount; (B) Oil: 5% by mass or more and 27% by mass or less based on the total amount of powder; (C) Surfactant: 12% by mass or more and 30% by mass or less based on the total amount of oil, 0.8% by mass or more and 3.5% by mass or less based on the total amount of oil and powder, and 0.9% by mass or more and 3.9% by mass or less based on the total amount of powder. The method for producing a solid powder cosmetic comprising the steps of: mixing a powder containing the component (A) with an oil-in-water emulsion containing the components (B), (C) and water to form a slurry; filling the slurry into a cosmetic container; and removing the solvent by suction.

[0051] <5> The following components (A) to (C): (A) Color pigment: 0.1% by mass or more and 34% by mass or less of the total powder amount; (B) Oil: 3% by mass or more and 28% by mass or less based on the total amount of powder; (C) Surfactant: 12.5% ​​by mass or more and 25% by mass or less based on the total amount of oil, 1.0% by mass or more and 3.0% by mass or less based on the total amount of oil and powder, and 1.4% by mass or more and 3.5% by mass or less based on the total amount of powder. The method for producing a solid powder cosmetic comprising the steps of: mixing a powder containing the component (A) with an oil-in-water emulsion containing the components (B), (C) and water to form a slurry; filling the slurry into a cosmetic container; and removing the solvent by suction. <6> The following components (A) to (C): (A) Color pigment: 0.1% by mass or more and 34% by mass or less of the total powder amount; (B) Oil: 5% by mass or more and 27% by mass or less based on the total amount of powder; (C) Surfactant: 12.5% ​​by mass or more and 25% by mass or less based on the total amount of oil, 1.0% by mass or more and 3.0% by mass or less based on the total amount of oil and powder, and 1.4% by mass or more and 3.5% by mass or less based on the total amount of powder. The method for producing a solid powder cosmetic comprising the steps of: mixing a powder containing the component (A) with an oil-in-water emulsion containing the components (B), (C) and water to form a slurry; filling the slurry into a cosmetic container; and removing the solvent by suction. <7> The following components (A) to (C): (A) Color pigment: 0.1% by mass or more and 34% by mass or less of the total powder amount; (B) Oil: 5% by mass or more and 27% by mass or less based on the total amount of powder; (C) Surfactant: 12.5% ​​by mass or more and 25% by mass or less based on the total amount of oil The method for producing a solid powder cosmetic comprising the steps of: mixing a powder containing component (A) with an oil-in-water emulsion containing components (B), (C) and water to form a slurry; filling the slurry into a cosmetic container; and removing the solvent by suction so that the solvent content is 10% by mass or more and 25% by mass or less. EXAMPLES

[0052] The present invention will now be described in more detail with reference to examples, but the present invention is not limited to these examples.

[0053] [Method of manufacturing molded products] Examples 1 to 11 and Comparative Examples 1 to 6 Pure water was added to a beaker and heated to 60°C, after which the surfactant and oil agent mixed in advance were added. Then, a homomixer MARKII 2.5 type (PRIMIX) was used to stir at 60°C and 6,000 rpm for 5 minutes to prepare an oil-in-water emulsion. The pigment was added to the emulsion and stirred with a spatula until the pigment was wet. Then, a homodisper 2.5 type (PRIMIX) equipped with a 40 mm dispersing blade was used to stir at 60°C and 4,200 rpm for 5 minutes to obtain a slurry. 3 g of the obtained slurry was filled into a 27 mm x 27 mm metal plate, and with two pieces of cloth overlapped between the press plate with suction holes and the metal plate, the solvent was sucked out from the suction holes by vacuum and pressed twice with a pressure of 1 kN for 2 seconds. Then, the mixture was dried at 40°C for 24 hours to prepare a solid powder cosmetic, and the moisture content after drying was also measured.

[0054] Comparative Example 6 Pure water heated to 60°C, surfactant, oil, and pigment were added to a beaker at once, and the mixture was stirred with a spatula until the pigment was wet. A homodisper 2.5 type (PRIMIX) equipped with a 40mm dispersing blade was then used to stir at 60°C and 4,200 rpm for 5 minutes to obtain a slurry. 3g of the obtained slurry was filled into a 27mm x 27mm metal plate, and with two pieces of cloth placed between a press plate with suction holes and the metal plate, the mixture was pressed twice for 2 seconds at a pressure of 1kN while the solvent was removed by vacuum suction from the suction holes. The mixture was then dried at 40°C for 24 hours to produce a solid powder cosmetic, and the moisture content after drying was measured.

[0055] [Method for measuring hardness of molded products (before drying)] The hardness of the molded product was measured using a RHEO METER COMPAC-100II (Sun Scientific) with a 2 mm diameter jig and a 1 mm penetration.

[0056] [Method for measuring moisture content of molded products (before drying)] The moisture content of the molded product (before drying) was calculated from the change in mass between the molded product (before drying) and the molded product (after drying). The drying conditions were 105°C for 3 hours.

[0057] [Number 1] Moisture content of molded product (before drying) = ((mass of molded product (before drying)) - (mass of molded product (after drying))) / (mass of molded product (before drying))

[0058] [Method for evaluating the uniformity of the surface of a molded product] The surface of the molded product (after drying) was observed under a microscope, the height of the unevenness was measured, and the surface was evaluated using the following scores. Surface uniformity of molded product (after drying) 5 points: No irregularities of up to 0.3 mm or more are observed 4 points: Maximum irregularities of 0.3 mm or more are observed 3 points: Maximum irregularities of 0.4 mm or more are observed 2 points: Maximum irregularities of 0.5 mm or more are observed 1 point: Maximum irregularities of 0.6 mm or more are observed

[0059] [Sensory evaluation method for molded products (after drying)] Five people engaged in cosmetics research were asked to evaluate the solid powder cosmetic products we had created on a 5-point scale in terms of "amount that comes off when used" and "comfortable feel with little powdery sensation." The average score was used as a score for the solid powder cosmetic products.

[0060] [Amount removed when used] 5 points: The amount of material removed when used with a tip is just right (Example 4) 4 points: The amount of material removed when used with a tip is greater than that of Comparative Example 4. 3 points: The amount of material removed when used with a tip is slightly greater than in Comparative Example 4. 2 points: The amount of material removed when used with a tip is slightly greater than in Comparative Example 4. 1. The amount of material removed when used with a tip is too small (Comparative Example 4)

[0061] [Comfortable texture with a powdery feel] 5 points: Very smooth and comfortable, with almost no powdery feel (Example 5) 4 points: Slightly less smooth and comfortable feeling compared to Example 5, and a slight powdery feeling 3 points: Less smooth and comfortable feeling compared to Example 5, more powdery feeling 2 points: The powder feels weaker than Comparative Example 3 1 point: Similarly, the powdery feel is quite strong (Comparative Example 3)

[0062] Table 1 shows the formulation of the produced solid powder cosmetic, the blending ratio of each component by mass, production conditions, and evaluation results of the molded products.

[0063] [Table 1]

[0064] *1: Talc JA-68R (Asada Flour Milling Co., Ltd.) *2: Sericite FSE (Sanshin Mining Co., Ltd.) *3: Synthetic iron oxide R-516P (Titanium Industries Co., Ltd.) *4: Synthetic iron oxide LL-100 (Titanium Industries Co., Ltd.) *5: Synthetic iron oxide BL-100P (Titanium Industries Co., Ltd.) *6: Metashine MT1040RS (Nippon Sheet Glass Co., Ltd.) *7: Leodor 430V LOT2085 (Kao Corporation) *8:SILKFLO 364 (Vantage Specialty Chemicals) *9: Nomcoat HP-100 (Nisshin Oillio Group, Ltd.) *10: P-RC-10SH (NOF Corporation)

[0065] As can be seen from Table 1, a solid powder cosmetic produced by mixing a powder containing component (A) with an oil-in-water emulsion containing component (B) (3% by mass or more and 28% by mass or less, based on the total amount of powder), component (C) (12% by mass or more and 30% by mass or less, based on the total amount of oil), and water to form a slurry, filling it into a cosmetics container, and then removing the solvent by suction is a solid powder cosmetic that has a highly uniform surface in the molded product, has just the right amount of removal upon use, and is very smooth and comfortable, with no powdery feel, compared to cosmetics with too much oil, cosmetics with too little surfactant, and cosmetics in which the solvent is not removed by suction.

Claims

1. The following components (A) to (C): (A) a color pigment that has been hydrophobized using one or more surface treatment agents selected from a silicone compound and an amino acid compound, the amount being 0.1% by mass or more and 34% by mass or less of the total amount of powder; (B) one or more oils selected from hydrocarbon oils, ester oils, ether oils, silicone oils, and higher alcohols having 10 to 24 carbon atoms, the amount of which is 3% by mass or more and 28% by mass or less based on the total amount of powder; (C) A nonionic surfactant having an HLB of 8 or more and 12 or less: 12% by mass or more and 30% by mass or less based on the total amount of the oil agent The method for producing a solid powder cosmetic comprising the steps of: mixing a powder containing component (A) with an oil-in-water emulsion containing components (B) and (C) and water to form a slurry; filling the slurry into a cosmetic container; and removing the solvent by suction.

2. The method for producing a solid powder cosmetic preparation according to claim 1, further comprising the step of: carrying out a drying step after removing the solvent by suction.

3. 3. The method for producing a solid powder cosmetic according to claim 1 or 2, wherein the content of component (C) is from 0.8% by mass to 3.0% by mass based on the total amount of the oil and the powder.

4. 4. The method for producing a solid powder cosmetic preparation according to any one of claims 1 to 3, wherein the content of component (C) is 0.9% by mass or more and 3.9% by mass or less based on the total amount of powder.

5. The method for producing a solid powder cosmetic preparation according to any one of claims 1 to 4, wherein the suction removal of the solvent is carried out so that the solvent content is 10% by mass or more and 25% by mass or less.

6. The method for producing a solid powder cosmetic preparation according to any one of claims 2 to 5, wherein the drying step after removing the solvent by suction is carried out at a temperature of 20 to 95°C.

7. The method for producing a solid powder cosmetic preparation according to any one of claims 1 to 6, wherein the peripheral speed of the tip of the stirring blade when mixing the powder containing component (A) with the oil-in-water emulsion containing components (B), (C) and water is 1 m / s or more and 30 m / s or less.

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