Method for manufacturing a solid powdered cosmetic

Abstract

The present invention provides a method for producing a solid powder cosmetic, which is high in surface uniformity of a molded product even when water is used as a dispersion solvent, is appropriate in the amount of use, is very smooth, comfortable, and does not feel the touch of powder. The present invention relates to a method for producing a solid powder cosmetic, characterized by containing components (A) to (C) of (A) a coloring pigment, which is 0.1 mass% or more and 34 mass% or less of the total amount of powder; (B) an oil agent, which is 3 mass% or more and 28 mass% or less of the total amount of powder; and (C) a surfactant, which is 12 mass% or more and 30 mass% or less of the total amount of the oil agent, in which the method for producing the solid powder cosmetic mixes a powder containing the component (A) and an oil-in-water emulsion containing the components (B), (C), and water to produce a slurry, and after filling the slurry into a cosmetic container, removes the solvent by suction.

Description

TECHNICAL FIELD

[0001] The present application relates to a method for producing a solid powder cosmetic. BACKGROUND

[0002] Among methods for producing a solid powder cosmetic, there are a dry method in which an oil-powder block in which a powder and an oil agent are mixed is compression-molded, and a wet method in which a slurry is prepared by adding water, an alcohol, or the like, which is a volatile solvent, to the oil-powder block, the slurry is filled into a container, and then the volatile solvent is removed by drying to obtain a cosmetic. The wet method has the following characteristics compared to the dry method: the uniform dispersion of the powder and the oil agent is promoted, and a smooth powder texture and a moist feeling of use are obtained.

[0003] Among the dispersion solvents of the wet method, volatile hydrocarbons and low-boiling alcohols are widely used, but in recent years, due to an increase in environmental awareness, a method using water as a solvent has been reported. However, in the case of preparing a slurry using water, the oil agent is difficult to uniformly disperse, and the dispersion state of the oil agent obtained becomes non-uniform from the surface to the inside, which is a problem in terms of usability and uniformity of the molded product.

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

[0005] Patent Literature 1: Japanese Patent Application Laid-Open No. 2009-242282 SUMMARY

[0006] The present application provides a method for producing a solid powder cosmetic, characterized by containing the following components (A) to (C),

[0007] (A) a coloring pigment, which is 0.1% by mass or more and 34% by mass or less of the total amount of the powder;

[0008] (B) an oil agent, which is 3% by mass or more and 28% by mass or less with respect to the total amount of the powder; and

[0009] (C) a surfactant, which is 12% by mass or more and 30% by mass or less with respect to the total amount of the oil agent,

[0010] In the method for producing a solid powder cosmetic, a powder containing the component (A) is mixed with an oil-in-water emulsion containing the components (B) and (C) and water to prepare a slurry, and then the slurry is filled into a cosmetic container, and the solvent is removed by suction. DETAILED DESCRIPTION

[0011] The solid powder cosmetic obtained by the method of Patent Document 1 has the following problems: unevenness is easily generated on the surface of the molded product by drying, the amount taken at the time of use becomes uneven, the surface of the molded product is hard, and the powder feels heavy in the sense of use because of powder aggregation.

[0012] Therefore, the present application relates to a manufacturing method of a solid powder cosmetic, which is high in surface uniformity of the molded product even when water is used as a dispersion solvent, is appropriate in the amount taken at the time of use, is very smooth, comfortable, and does not feel the touch of powder.

[0013] The present inventors and others have studied the filling step of the cosmetic in view of the above problems, and as a result, it has been found that the key is the composition of an oil-in-water emulsion prepared using water as a dispersion solvent before mixing with powder, and the step of removing the solvent. That is, it has been found that a solid powder cosmetic, which is high in surface uniformity of the molded product, is appropriate in the amount taken at the time of use, is very smooth, comfortable, and does not feel the touch of powder, can be obtained by mixing a cosmetic base using a specific amount of surfactant with powder to make a slurry, and removing the solvent by suction after filling into a cosmetic container, thereby completing the present application.

[0014] According to the present application, it is possible to manufacture a solid powder cosmetic, which is high in surface uniformity of the molded product, is appropriate in the amount taken, is very smooth, comfortable, and does not feel the touch of powder.

[0015] The manufacturing method of the present application relates to a solid powder cosmetic containing the following components (A) to (C),

[0016] (A) a coloring pigment, which is 0.1 mass% or more and 34 mass% or less of the total amount of powder;

[0017] (B) an oil agent, which is 3 mass% or more and 28 mass% or less of the total amount of powder;

[0018] (C) a surfactant, which is 12 mass% or more and 30 mass% or less of the total amount of oil agent.

[0019] Note that in the present specification, the content of a component refers to the mass ratio when the mass of a substance taken as a reference is taken as 100, and is indicated with "mass%" as the unit.

[0020] In the solid powder cosmetic of the present application, a powder containing (A) a coloring pigment is included.

[0021] The powder used in the present application is not limited as long as it is a powder used in general cosmetics, and in addition to (A) a coloring pigment, a body pigment, a glittering pigment, or the like can be included.

[0022] As the (A) coloring pigment, for example, metal oxides such as titanium oxide, zinc oxide, yellow iron oxide, Indian red, black iron oxide, ultramarine blue, blue black, chromium oxide, chromium hydroxide, and the like; metal complexes such as manganese violet, cobalt titanate, and the like; further, inorganic pigments such as carbon black, and the like; 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, Blue No. 404, and the like; natural organic pigments such as β-carotene, caramel pigment, paprika pigment, and the like can be mentioned.

[0023] As the body pigment, for example, inorganic pigments such as silicic acid, anhydrous silicic acid, magnesium silicate, talc, sericite, boron nitride, mica, synthetic mica, glass flake, 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, silicon dioxide, aluminum oxide, and the like, and composite powders thereof can be mentioned.

[0024] As the glittering pigment, for example, substances obtained by coating the surface of plate-like powders such as mica, synthetic phlogopite, glass, silicon dioxide, aluminum oxide, and the like with a coloring agent such as titanium oxide, iron oxide, silicon oxide, ultramarine blue, chromium oxide, tin oxide, chromium hydroxide, gold, silver, carmine, organic pigments, and the like; and substances obtained by cutting a film raw material such as polyethylene terephthalate / poly(methyl methacrylate) laminated powder, polyethylene terephthalate / aluminum vapor deposition powder, polyethylene terephthalate / gold vapor deposition laminated powder, and the like into an arbitrary shape can be used.

[0025] Further, for example, organic powders such as polyethylene powder, polypropylene powder, poly(methyl methacrylate) powder, nylon powder, polytetrafluoroethylene powder, silicone powder, silicone rubber powder, silk powder, urethane powder, cellulose powder, starch powder, polyfluoroethylene, and the like; inorganic powders such as silicon dioxide, magnesium carbonate, calcium carbonate, and the like; acylated lysine powders such as lauroyl lysine, and the like; metal soap powders as higher fatty acid metal salts, and the like can be used.

[0026] In addition, from the viewpoint of improving the powder pick-up property of the solid powder cosmetic and the viewpoint of improving the spreadability to the skin, the above-mentioned organic powders and inorganic powders are preferably spherical powders, and more preferably, at least one kind of pigment among the body pigment, the coloring pigment, and the glittering pigment is used in combination with the spherical powders.

[0027] The size, shape, etc. of these powders are not limited, and in addition to being used directly, they can be subjected to hydrophobizing treatment, hydrophilizing treatment, etc. by conventional methods.

[0028] As the hydrophobizing treatment, there are no limitations as long as it is a treatment that is performed on a conventional cosmetic powder, and dry treatment, wet treatment, etc. can 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, an organic titanate, etc.

[0029] As specific examples of the surface treatment agent, the following can be given: fluorine compounds such as perfluoropolyether, perfluoroalkyl phosphate ester, perfluoroalkyl alkoxysilane, fluorine-modified silicone; silicone compounds such as dimethylpolysiloxane, methylhydrogenpolysiloxane, cyclic silicone, mono-terminal or di-terminal trialkoxy-modified organopolysiloxane, cross-linking silicone, silicone resin, fluorine-modified silicone resin, acrylic-modified silicone; metal soaps such as aluminum stearate, aluminum myristate, zinc stearate, magnesium stearate; amino acid compounds such as proline, hydroxyproline, alanine, glycine, sarcosine, glutamic acid, aspartic acid, lauroyllysine, lysine and its derivatives, acylated amino acid; lecithin, hydrogenated lecithin; alkylsilanes such as methyltrimethoxysilane, ethyltrimethoxysilane, hexyltrimethoxysilane, octyltrimethoxysilane, octyltriethoxysilane, triethoxysiloxyoctanoylsilane; oil agents such as polyisobutylene, wax, oil, fatty acid; organic titanates such as isopropyltriisostearyl titanate.

[0030] In addition, as the hydrophilizing treatment, there are no limitations as long as it is a treatment that is performed on a conventional cosmetic powder.

[0031] For example, gum arabic, gum tragacanth, arabinogalactan, locust bean gum (carob gum), guar gum, gum karaya, carrageenan, pectin, agar, quince seed (Cydonia oblonga Mill.), starch (rice, corn, potato, wheat), algin, tranth gum, locust bean gum, and the like can be given as plant-based polymers. Xanthan gum, dextran, succinoglucan, amylopectin, and the like can be given as microbial-based polymers. Collagen, casein, albumin, deoxyribonucleic acid (DNA), and salts thereof, and the like can be given as animal-based polymers. Carboxymethyl starch, methylhydroxypropyl starch, and the like can be given as starch-based polymers. Cellulose-based polymers such as methylcellulose, ethylcellulose, methylhydroxypropylcellulose, carboxymethylcellulose, hydroxymethylcellulose, hydroxypropylcellulose, nitrocellulose, sodium cellulose sulfate, sodium carboxymethylcellulose, crystalline cellulose, and cellulose powder. Sodium alginate, alginic acid propylene glycol ester, and the like can be given as alginic acid-based polymers. Vinyl-based polymers such as polyvinyl methyl ether, polyvinylpyrrolidone, and carboxyvinyl polymer. Polyethylene oxide-based polymers such as polyethylene glycol, polyethylene glycol silane, and the like. Polyethylene oxide-polypropylene oxide copolymer-based polymers. Acrylic acid-based polymers such as sodium polyacrylate, polyacrylate, polyacrylamide, and the like. Further, inorganic silicic acid-based compounds such as silicon dioxide, and the like.

[0032] As the powder, a hydrophobic powder is preferably contained from the viewpoint of the spread width at the time of powdering and coating, and the cosmetic durability, and more preferably a powder that has been surface-treated with a fluorine compound, a silicone compound, a metal soap, an amino acid compound, lecithin, an alkylsilane, an oil agent, an organic titanate, or the like.

[0033] In the case where the above-mentioned hydrophobic powder is contained as the powder, the content of the hydrophobic powder is preferably 10% by mass or more, more preferably 30% by mass or more, and further preferably 50% by mass or more, in the total powder, and is preferably 100% by mass or less, more preferably 95% by mass or less, and further preferably 90% by mass or less, from the viewpoint of being very smooth, comfortable, and not feeling the touch of powder.

[0034] As the powder, one kind or two or more kinds in combination can be used, and the total content of the powder in the solid powder cosmetic of the present application is preferably 70% by mass or more and 95% by mass or less, more preferably 72% by mass or more and 92% by mass or less, further preferably 74% by mass or more and 90% by mass or less, and more further preferably 75% by mass or more and 85% by mass or less, in the total amount of the solid powder cosmetic, from the viewpoint of the spread width at the time of coating, the moist feeling at the time of coating, and the cosmetic durability.

[0035] The content of the (A) coloring pigment in the total amount of the powder is preferably 0.1% by mass or more and 34% by mass or less, from the viewpoint of obtaining a solid powder cosmetic that is appropriate in the amount of use, is very smooth, comfortable, and does not feel the touch of powder.

[0036] More preferably, it is 0.2% by mass or more, further preferably 0.3% by mass or more, more further preferably 0.5% by mass or more, more further preferably 1.0% by mass or more, and more further preferably 2% by mass or more. In addition, more preferably, it is 40% by mass or less, further preferably 36% by mass or less, more further preferably 30% by mass or less, and more further preferably 25% by mass or less.

[0037] From the viewpoint of moldability and obtaining a solid powder cosmetic in which the surface of the molded product is uniform, the amount of powder used is appropriate, it is very smooth, comfortable, and the feeling of the powder is not felt, it is preferable that the total amount of the powder contain 5% by mass or more and 95% by mass or less of the base pigment.

[0038] From the viewpoint of moldability and obtaining a solid powder cosmetic in which the surface of the molded product is very smooth, comfortable, and the feeling of the powder is not felt, it is more preferable that it be 10% by mass or more, further preferable that it be 15% by mass or more, and more further preferable that it be 20% by mass. In addition, from the viewpoint of improving the surface uniformity of the molded product, it is more preferable that it be 85% by mass or less, further preferable that it be 75% by mass or less, and more further preferable that it be 65% by mass or less.

[0039] From the viewpoint of obtaining a solid powder cosmetic in which the surface of the molded product is uniform, the amount of powder used is appropriate, it is very smooth, comfortable, and the feeling of the powder is not felt, it is preferable that the total amount of the powder contain 0% by mass or more and 95% by mass or less of the glittering pigment. From the viewpoint of improving the surface uniformity of the molded product, it is more preferable that it be 5% by mass or more, further preferable that it be 10% by mass or more, and more further preferable that it be 20% by mass or more. In addition, from the viewpoint of moldability, it is more preferable that it be 85% by mass or less, further preferable that it be 75% by mass or less, and more further preferable that it be 65% by mass or less.

[0040] In the solid powder cosmetic of the present application, (B) an oil agent is contained.

[0041] As the oil agent of component (B), for example, a hydrocarbon oil, an ester oil, an ether oil, a silicone oil, a higher alcohol having 10 to 24 carbon atoms, or the like can be given.

[0042] More specifically, as the hydrocarbon oil, squalane, liquid paraffin, liquid isoparaffin, heavy liquid isoparaffin, or the like can be given. Among these hydrocarbon oils, from the viewpoint of obtaining a solid powder cosmetic in which the surface of the molded product is uniform, the amount of powder used is appropriate, it is very smooth, comfortable, and the feeling of the powder is not felt, it is preferable that at least one or two or more selected from liquid paraffin, liquid isoparaffin, and squalane be contained, and more preferably at least one selected from liquid isoparaffin and squalane be contained.

[0043] As the ester oil, monoglyceride, diglyceride, triglyceride, and tetraglyceride can be given.

[0044] As the monoglyceride, monoglyceride of aliphatic or aromatic monocarboxylic acid or dicarboxylic acid having 2 to 24 carbon atoms can be given, and as specific examples, hexadecyl 2-ethylhexanoate, hexadecyl 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, dimethyl octanoate hexyldecyl ester, hexadecyl lactate, myristyl lactate, acetylated lanolin, 2-ethylhexyl succinate, 2-hexyldecyl adipate, alkyl (C12-C15) benzoate, and the like can be given. Among these, from the viewpoint of obtaining a solid powder cosmetic which is high in uniformity of the surface of the molded product, is appropriate in the amount of use, is very smooth, comfortable, and does not feel the touch of powder, it is preferable to contain at least one or two or more selected from the group consisting of hexadecyl 2-ethylhexanoate, isononyl isononanoate, isotridecyl isononanoate, isopropyl myristate, and octyl methoxycinnamate, more preferable to contain at least one or two or more selected from the group consisting of hexadecyl 2-ethylhexanoate, isononyl isononanoate, and isotridecyl isononanoate, and further more preferable to contain at least one or two or more selected from the group consisting of hexadecyl 2-ethylhexanoate and isononyl isononanoate.

[0045] As the diglyceride, diester of dicarboxylic acid having 3 to 18 carbon atoms, di-fatty acid ester of polyhydric alcohol, and the like can be given, and as specific examples, propylene glycol dioctanoate, neopentyl glycol dicaprate, ethylene glycol distearate, propylene glycol diisostearate, glycerol diisostearate, glycerol monomyristate monoisostearate, glycerol di-2-heptylundecanoate, di-2-ethylhexyl succinate, diisopropyl sebacate, diisostearyl malate, ethylene glycol di-2-ethylhexanoate, diisobutyl adipate, di-2-heptylundecyl adipate, di-2-ethylhexyl sebacate, and the like can be given. Among these, from the viewpoint of obtaining a solid powder cosmetic which is high in uniformity of the surface of the molded product, is appropriate in the amount of use, is very smooth, comfortable, and does not feel the touch of powder, it is preferable to contain at least one or two or more selected from the group consisting of propylene glycol dioctanoate, neopentyl glycol dicaprate, ethylene glycol distearate, diisostearyl malate, and propylene glycol diisostearate, more preferable to contain at least one or two or more selected from the group consisting of propylene glycol dioctanoate, neopentyl glycol dicaprate, and diisostearyl malate, further more preferable to contain at least one or two or more selected from the group consisting of neopentyl glycol dicaprate and diisostearyl malate, and still further more preferable to contain diisostearyl malate.

[0046] As the triester oil, a tri fatty acid ester of a polyol of 3 or more valence can be given, specifically, glyceryl trimyristate, glyceryl triisopalmitate, glyceryl tri-2- heptylundecanoate, trimethylolpropane triethylhexanoate, trimethylolpropane trioctanoate, tri(caprylate / caprate)glyceride, triolein, glyceryl tri-2-ethylhexanoate, glyceryl triisostearate, olive oil, jojoba oil, and the like. Among these, from the viewpoint of obtaining a solid powder cosmetic of a molded product having high uniformity of the surface, appropriate amount of use at the time of use, very smoothness, comfort, and no feeling of the touch of powder, it is preferable to contain at least one or two or more kinds selected from tri(caprylate / caprate)glyceride, triolein, glyceryl tri-2-ethylhexanoate, and glyceryl triisostearate, and more preferably tri(caprylate / caprate)glyceride.

[0047] As the tetraester oil, a tetra fatty acid ester of a polyol of 4 or more valence can be given, specifically, pentaerythritol tetra(behenate / benzoate / ethylhexanoate), pentaerythritol tetraethylhexanoate, pentaerythritol tetraoctanoate, pentaerythritol tetra-2-ethylhexanoate. Among these, from the viewpoint of obtaining a solid powder cosmetic of a molded product having high uniformity of the surface, appropriate amount of use at the time of use, very smoothness, comfort, and no feeling of the touch of powder, it is preferable to contain at least one or two or more kinds selected from pentaerythritol tetraethylhexanoate, pentaerythritol tetraoctanoate, and pentaerythritol tetra-2-ethylhexanoate, and more preferably pentaerythritol tetraethylhexanoate.

[0048] As the ether oil, a dialkyl ether can be given, specifically, dihexyl ether, dioctyl ether, cetyl-1,3-dimethylbutyl ether, and the like. Among these, from the viewpoint of obtaining a solid powder cosmetic of a molded product having high uniformity of the surface, appropriate amount of use at the time of use, very smoothness, comfort, and no feeling of the touch of powder, it is preferable to contain at least one or two or more kinds selected from dioctyl ether and cetyl-1,3-dimethylbutyl ether, and more preferably cetyl-1,3-dimethylbutyl ether.

[0049] As the silicone oil, there can be mentioned crosslinked methylpolysiloxane, network-type methylpolysiloxane, dimethylpolysiloxane, methyltrimethylpolysiloxane, dimethylcyclopolysiloxane, methylphenylpolysiloxane, higher alcohol-modified organopolysiloxane, and the like. Among these, from the viewpoint of obtaining a solid powder cosmetic of a molded product having high uniformity of the surface, proper amount of use at the time of use, very smoothness, comfort, and no feeling of the touch of powder, it is preferred to contain at least one or two or more selected from the group consisting of dimethylpolysiloxane, methyltrimethylpolysiloxane, dimethylcyclopolysiloxane, and methylphenylpolysiloxane, more preferred to contain at least one or two or more selected from the group consisting of dimethylpolysiloxane, methyltrimethylpolysiloxane, and methylphenylpolysiloxane, further preferred to contain at least one or two or more selected from the group consisting of dimethylpolysiloxane, methyltrimethylpolysiloxane, and methylphenylpolysiloxane. Furthermore, the silicone oil is further preferred to contain a volatile silicone oil.

[0050] As the volatile silicone oil, there can be mentioned, for example, linear dimethylpolysiloxane such as dimethylpolysiloxane (1 cs), dimethylpolysiloxane (1.5 cs), dimethylpolysiloxane (2 cs); branched siloxane such as methyltrimethylpolysiloxane, tris(trimethylsilyl)methylsilane, tetra(trimethylsilyl)silane; cyclic dimethylpolysiloxane such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane; and the like, and it is preferred to contain at least one or two or more selected from the group consisting of linear dimethylpolysiloxane and branched siloxane, more preferred to contain at least one or two or more selected from the group consisting of dimethylpolysiloxane (1.5 cs) and methyltrimethylpolysiloxane.

[0051] As the higher alcohol having 10 to 24 carbon atoms, from the viewpoint of stability of oil-in-water emulsions, stability of slurries, and the like, it is preferred to contain at least one or two or more selected from the group consisting of higher alcohols having 12 to 22 carbon atoms, more preferred to contain at least one or two or more selected from the group consisting of higher alcohols having 16 to 22 carbon atoms, further preferred to contain at least one or two or more selected from the group consisting of higher alcohols having 18 to 22 carbon atoms, more further preferred to contain at least one or two or more selected from the group consisting of higher alcohols having 18 and 22 carbon atoms.

[0052] As the oil agent of component (B), from the viewpoint of obtaining a solid powder cosmetic of a molded product having high uniformity of the surface, proper amount of use at the time of use, very smoothness, comfort, and no feeling of the touch of powder, it is preferred to contain at least one or two or more selected from the group consisting of ester oil and silicone oil, more preferred to contain at least one or two or more selected from the group consisting of monoester oil, diester oil, and silicone oil, more further preferred to contain at least one or two or more selected from the group consisting of monoester oil, diester oil, dimethylpolysiloxane, methyltrimethylpolysiloxane, and methylphenylpolysiloxane.

[0053] As the oil agent of component (B), from the viewpoint of obtaining a solid powder cosmetic of which the surface of the molded product is uniform, the amount used is appropriate, it is very smooth, comfortable, and the feeling of the touch of the powder is not felt, it is preferable that the oil agent be one that is liquid at 25°C. Further, it is more preferable that it contain at least a volatile silicone oil.

[0054] The content of component (B) with respect to the total amount of the powder is preferably 3% by mass or more and 28% by mass or less, and more preferably 5% by mass or more and 27% by mass or less, from the viewpoint of obtaining a solid powder cosmetic of which the surface of the molded product is uniform, the amount used is appropriate, it is very smooth, comfortable, and the feeling of the touch of the powder is not felt. Further, it is more preferably 7% by mass or more, further preferably 10% by mass or more, and more further preferably 14% by mass or more, and more further preferably 18% by mass or more, from the viewpoint of moldability and obtaining a solid powder cosmetic of which the amount used is appropriate, it is very smooth, comfortable, and the feeling of the touch of the powder is not felt. Further, it is more preferably 28% by mass or less, from the viewpoint of obtaining a solid powder cosmetic of which the surface of the molded product is uniform, the amount used is appropriate, it is very smooth, comfortable, and the feeling of the touch of the powder is not felt.

[0055] As the surfactant of component (C), from the viewpoint of the stability of the slurry, it is preferable to contain a nonionic surfactant.

[0056] As the surfactant of component (C), a nonionic surfactant other than a silicone type and a silicone type nonionic surfactant can be mentioned.

[0057] As the nonionic surfactant other than a silicone type, there is no limitation as long as it is a nonionic surfactant used for a general cosmetic, and 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 ethers, polyoxyethylene phytosterol ethers, polyoxyethylene cholestanol ethers, polyoxyethylene cholesterol ethers, and the like can be mentioned.

[0058] As the silicone-based nonionic surfactant, there are mentioned linear or branched polyether-modified silicone such as polyoxyethylene-methylpolysiloxane copolymer, polyoxyethylene-polydimethylsiloxane copolymer (specifically, PEG-9 polydimethylsiloxane copolymer), alkyl-modified polyether-modified silicone (specifically, cetyl PEG / PPG-10 / 1 polydimethylsiloxane), alkyl-modified polyoxyethylene-polydimethylsiloxane copolymer (specifically, dodecyl PEG-9 polydimethylsiloxane copolymer), and alkyl chain co-modified polyether-modified silicone.

[0059] Among these, from the viewpoint of stability of oil-in-water emulsion, stability of slurry, high uniformity of the surface of the molded product, proper amount of use at the time of use, very smoothness, comfort and no feeling of powder touch, the solid powder cosmetic preferably contains at least one or two or more selected from sorbitan fatty acid ester, linear or branched polyether-modified silicone, alkyl-modified polyether-modified silicone and alkyl-modified polyoxyethylene-polydimethylsiloxane, more preferably at least one or two or more selected from sorbitan fatty acid ester, linear or branched polyether-modified silicone and alkyl-modified polyether-modified silicone, and more preferably at least one or two or more selected from sorbitan fatty acid ester and alkyl-modified polyether-modified silicone. Further, it is preferable to use a nonionic surfactant other than silicone and a silicone-based nonionic surfactant in combination.

[0060] From the viewpoint of stability of oil-in-water emulsion, stability of slurry, high uniformity of the surface of the molded product, proper amount of use at the time of use, very smoothness, comfort and no feeling of powder touch, the HLB of these nonionic surfactants is preferably 3.5 to 16, more preferably 7 to 14, and still more preferably 8 to 12.

[0061] Here, HLB (Hydrophilic-Lipophilic Balance) is a value indicating the molecular weight of the hydrophilic group portion in the total molecular weight of the surfactant, and for nonionic surfactants, it is calculated by the formula of Griffin. For the HLB of a mixed surfactant composed of two or more nonionic surfactants, it is calculated by the following method. The HLB of the mixed surfactant is a value obtained by adding and averaging the HLB values of the respective nonionic surfactants according to their blending ratio.

[0062] Mixed HLB =∑(HLBx x Wx) / ∑Wx

[0063] HLBx represents the HLB value of the nonionic surfactant X. Wx represents the weight (g) of the nonionic surfactant X having the HLBx value.

[0064] In the case where the nonionic surfactant other than silicone and the silicone nonionic surfactant are used in combination in the component (C), the mass ratio of the silicone nonionic surfactant to the nonionic surfactant other than silicone is preferably (silicone nonionic surfactant) / (nonionic surfactant other than silicone) = 0.5 to 20, more preferably 1 to 10, and further preferably 2 to 5 from the viewpoints of the stability of the oil-in-water emulsion, the stability of the slurry, obtaining a uniform appearance, inhibiting separation and viscosity reduction after storage, and the like.

[0065] The content of the component (C) with respect to the total amount of the oil agent is preferably 12 mass% or more and 30 mass% or less from the viewpoints of the stability of the oil-in-water emulsion, the stability of the slurry, obtaining a high uniformity of the surface of the molded product, appropriate amount of use at the time of use, very smoothness, comfort, and no feeling of the touch of the powder, and the like. Further, it is more preferably 12.5 mass% or more, further preferably 13 mass% or more, still further preferably 13.5 mass% or more, still further preferably 14 mass% or more from the viewpoints of the stability of the oil-in-water emulsion, the stability of the slurry, and still further preferably 25 mass% or less, further preferably 20 mass% or less from the viewpoints of obtaining a high uniformity of the surface of the molded product, appropriate amount of use at the time of use, very smoothness, comfort, and no feeling of the touch of the powder, and the like.

[0066] The content of the component (C) with respect to the total amount of the powder is preferably 0.9 mass% or more and 3.9 mass% or less from the viewpoints of the stability of the oil-in-water emulsion, the stability of the slurry, obtaining a high uniformity of the surface of the molded product, appropriate amount of use at the time of use, very smoothness, comfort, and no feeling of the touch of the powder, and the like. Further, it is more preferably 1.4 mass% or more, further preferably 2.0 mass% or more, still further preferably 2.5 mass% or more from the viewpoints of the stability of the oil-in-water emulsion, the stability of the slurry, and still further preferably 4.5 mass% or less, more preferably 4.0 mass% or less, further preferably 3.5 mass% or less from the viewpoints of obtaining a high uniformity of the surface of the molded product, appropriate amount of use at the time of use, very smoothness, comfort, and no feeling of the touch of the powder, and the like.

[0067] From the viewpoint of the stability of the oil-in-water emulsion, the stability of the slurry, the high uniformity of the surface of the molded product, the appropriate amount of use at the time of use, the very smoothness, the comfort, and the feeling of the touch of the powder not being felt, the content of the component (C) with respect to the total amount of the oil agent and the total powder amount is preferably 0.8% by mass or more and 3.5% by mass or less. Further, from the viewpoint of the high uniformity of the surface of the molded product, the appropriate amount of use at the time of use, the very smoothness, the comfort, and the feeling of the touch of the powder not being felt, it is more preferable to be 1.0% by mass or more, it is further preferable to be 1.3% by mass or more, it is more further preferable to be 1.7% by mass or more, it is more further preferable to be 2.0% by mass or more, and it is more further preferable to be 3.2% by mass or less, and it is further preferable to be 3.0% by mass or less.

[0068] In the solid powder cosmetic of the present application, in addition to the powder, the oil agent, and the surfactant, a polyol, a water-soluble polymer, a cosmetic component, a perfume, a preservative, an ultraviolet absorber, an antioxidant, or the like can be contained.

[0069] The solid powder cosmetic of the present application is characterized in that the powder containing the component (A) is mixed with the oil-in-water emulsion containing the components (B), (C), and water as a solvent to make a slurry, and after the slurry is filled into a cosmetic container, the solvent is removed by suction. In the method employed in the production of the conventional solid powder cosmetic, the powder containing the component (A) is mixed with the component (B) oil agent and homogenized, and then dispersed in the solvent, but by employing the method of the present application, a solid powder cosmetic having a high uniformity of the surface of the molded product, an appropriate amount of use at the time of use, very smoothness, and an excellent feeling of use can be produced.

[0070] First, the process of obtaining the oil-in-water emulsion containing the components (B), (C), and water will be described.

[0071] From the viewpoint of the workability at the time of production and the stability of the emulsion, the amount of water used at the time of production of the oil-in-water emulsion is preferably 50% by mass or more, more preferably 60% by mass or more, further preferably 65% by mass or more, preferably 90% by mass or less, more preferably 85% by mass or less, further preferably 82% by mass or less, more further preferably 78% by mass or less, and more further preferably 75% by mass or less, with respect to the entire emulsion. In addition, the emulsion of the present application uses water as a solvent, but an organic solvent that is water-soluble can also be contained within a range that does not hinder emulsification. In the case where an organic solvent that is water-soluble is contained, with respect to water, it is preferably 10% by mass or less, more preferably 5% by mass or less, and further preferably 0% by mass.

[0072] For the device for producing the oil-in-water emulsion, there is no particular limitation as long as a uniform oil-in-water emulsion can be produced, and a homomixer, an emulsifying device having dispersing blades, is preferably used. From the viewpoint of improving emulsification dispersibility and reducing the load at the time of production, the peripheral speed of the tip of the stirring blade of the mixer at the time of emulsification is preferably 1 m / s or more, more preferably 3 m / s or more, and further preferably 5 m / s or more, and in addition, is preferably 30 m / s or less, more preferably 25 m / s or less, and further preferably 20 m / s or less.

[0073] From the viewpoint of improving emulsification dispersibility and reducing the load at the time of production, the stirring time is preferably 1 minute or more, more preferably 3 minutes or more, and further preferably 5 minutes or more, and in addition, is preferably 90 minutes or less, more preferably 75 minutes or less, and further preferably 60 minutes or less.

[0074] From the viewpoint of improving emulsification dispersibility and reducing the load at the time of production, the stirring temperature is preferably 15°C or more, more preferably 20°C or more, and further preferably 25°C or more, and in addition, is preferably 90°C or less, more preferably 80°C or less, and further preferably 70°C or less.

[0075] Next, the powder containing the component (A) is mixed with the oil-in-water emulsion to produce a slurry.

[0076] In this step, any mixing device that can uniformly mix the emulsion and the powder can be used, and a high-speed disperser, such as a homodisperser having dispersing blades, or the like, can be used.

[0077] From the viewpoint of improving emulsification dispersibility and reducing the load at the time of production, the peripheral speed of the tip of the stirring blade of the mixing device at the time of mixing is preferably 1 m / s or more, more preferably 3 m / s or more, and further preferably 5 m / s or more, and in addition, is preferably 30 m / s or less, more preferably 25 m / s or less, and further preferably 20 m / s or less.

[0078] From the viewpoint of improving emulsification dispersibility and reducing the load at the time of production, the stirring time is preferably 1 minute or more, more preferably 3 minutes or more, and further preferably 5 minutes or more, and in addition, is preferably 120 minutes or less, more preferably 75 minutes or less, and further preferably 60 minutes or less.

[0079] From the viewpoint of improving emulsification dispersibility and reducing the load at the time of production, the stirring temperature is preferably 15°C or more, more preferably 20°C or more, and further preferably 25°C or more, and in addition, is preferably 90°C or less, more preferably 80°C or less, and further preferably 70°C or less.

[0080] After the obtained slurry is filled into the cosmetic container, the solvent is removed by suction. In the case where an organic solvent is used as the solvent, the solvent is preferably removed by suction from the viewpoint of safety and the prevention of the occurrence of a phenomenon in which the oil agent is locally present on the surface of the molded product together with the solvent due to capillary phenomenon when only drying is performed, and in the case where water is used as the solvent, since this problem does not occur, suction removal is not necessary. Furthermore, when it is an emulsified system, if the solvent is removed by suction, the oil agent is also easily removed, which is common knowledge to those skilled in the art.

[0081] On the other hand, in the present application, it is clarified that, in the case where water is used as the solvent, the solvent is removed by suction while being pressed, whereby the hardness of the cosmetic is increased and the collapse resistance is also improved, and thus the present application is characterized in that suction removal is performed.

[0082] The cosmetic container used in the present application is a container suitable for the target solid powder cosmetic.

[0083] The filling method is not particularly limited and can be any of a front filling method or a back filling method.

[0084] The timing of the removal of the solvent by suction can be after the filling of the slurry into the cosmetic container is completed or the slurry can be filled into the cosmetic container while the solvent is removed by suction. In this regard, the degree of vacuum at the time of the removal of the solvent by suction is preferably -5 kPa or higher and 80 kPa or lower from the viewpoints of the efficiency of the removal of the solvent and the load on the machine at the time of production. The solvent content after the removal of the solvent is preferably 10% or higher and 25% or lower from the viewpoints of the efficiency of the removal of the solvent and the load on the machine at the time of production and the viewpoint of the drop resistance of the product. Furthermore, the solvent content is more preferably 12% or higher, further preferably 15% or higher, still further preferably 19% or higher, still further preferably 20% or higher, and still further preferably 24% or lower, and still further preferably 23% or lower from the viewpoints of the efficiency of the removal of the solvent and the load on the machine at the time of production. In addition, the solvent content is a value determined by the method described in the examples.

[0085] Further, as necessary, the solid powder cosmetic is preferably dried. The drying method is not particularly limited and can be natural drying, and hot air drying, vacuum drying can be preferably used.

[0086] The drying temperature is preferably 20°C or higher, more preferably 25°C or higher, and further preferably 30°C or higher, and is preferably 95°C or lower, more preferably 90°C or lower, and further preferably 85°C or lower from the viewpoints of the efficiency of the drying and the load on the machine at the time of production and the thermal deterioration of the product.

[0087] The water content (water content rate) in the solid powder cosmetic after drying is preferably 0.01 to 1.0% by mass, more preferably 0.05 to 0.8% by mass, and further preferably 0.1 to 0.5% by mass, from the viewpoint of the amount of use at the time of use and the strength against dropping.

[0088] As the solid powder cosmetic obtained by the method of the present application, there can be mentioned eye shadow, foundation, blush, eyeliner, loose powder, lipstick, and the like.

[0089] With respect to the above-described embodiments, the present application further discloses the following production method.

[0090] <1> A production method of a solid powder cosmetic, characterized by containing the following components (A) to (C) in the solid powder cosmetic,

[0091] (A) a coloring pigment, which is 0.1% by mass or more and 34% by mass or less of the total amount of the powder;

[0092] (B) an oil agent, which is 5% by mass or more and 27% by mass or less with respect to the total amount of the powder; and

[0093] (C) a surfactant, which is 12.5% by mass or more and 25% by mass or less with respect to the total amount of the oil agent,

[0094] In the production method of the solid powder cosmetic, the powder containing the component (A) is mixed with an oil-in-water emulsion containing the components (B) and (C) and water to make a slurry, which is filled into a cosmetic container, and then the solvent is removed by suction.

[0095] <2> A production method of a solid powder cosmetic, characterized by containing the following components (A) to (C) in the solid powder cosmetic,

[0096] (A) a coloring pigment, which is 0.1% by mass or more and 34% by mass or less of the total amount of the powder;

[0097] (B) an oil agent, which is 5% by mass or more and 27% by mass or less with respect to the total amount of the powder; and

[0098] (C) a surfactant, which is 12% by mass or more and 30% by mass or less with respect to the total amount of the oil agent, and 0.8% by mass or more and 3.5% by mass or less with respect to the total amount of the oil agent and the powder,

[0099] In the production method of the solid powder cosmetic, the powder containing the component (A) is mixed with an oil-in-water emulsion containing the components (B) and (C) and water to make a slurry, which is filled into a cosmetic container, and then the solvent is removed by suction.

[0100] <3> A method for producing a solid powder cosmetic, characterized by comprising the following components (A) to (C) in the solid powder cosmetic,

[0101] (A) a coloring pigment, which is 0.1 mass% or more and 34 mass% or less of the total amount of the powder;

[0102] (B) an oil agent, which is 5 mass% or more and 27 mass% or less with respect to the total amount of the powder; and

[0103] (C) a surfactant, which is 12 mass% or more and 30 mass% or less with respect to the total amount of the oil agent, and 0.9 mass% or more and 3.9 mass% or less with respect to the total amount of the powder,

[0104] In the method for producing the solid powder cosmetic, a powder containing the component (A) is mixed with an oil-in-water emulsion containing the components (B) and (C) and water to produce a slurry, and the slurry is filled into a cosmetic container, and then a solvent is removed by suction.

[0105] <4> A method for producing a solid powder cosmetic, characterized by comprising the following components (A) to (C) in the solid powder cosmetic,

[0106] (A) a coloring pigment, which is 0.1 mass% or more and 34 mass% or less of the total amount of the powder;

[0107] (B) an oil agent, which is 5 mass% or more and 27 mass% or less with respect to the total amount of the powder; and

[0108] (C) a surfactant, which is 12 mass% or more and 30 mass% or less with respect to the total amount of the oil agent, 0.8 mass% or more and 3.5 mass% or less with respect to the total amount of the oil agent and the powder, and 0.9 mass% or more and 3.9 mass% or less with respect to the total amount of the powder,

[0109] In the method for producing the solid powder cosmetic, a powder containing the component (A) is mixed with an oil-in-water emulsion containing the components (B) and (C) and water to produce a slurry, and the slurry is filled into a cosmetic container, and then a solvent is removed by suction.

[0110] <5> A method for producing a solid powder cosmetic, characterized by comprising the following components (A) to (C) in the solid powder cosmetic,

[0111] (A) a coloring pigment, which is 0.1 mass% or more and 34 mass% or less of the total amount of the powder;

[0112] (B) an oil agent, which is 3 mass% or more and 28 mass% or less with respect to the total amount of the powder; and

[0113] (C) a surfactant, the total amount of which with respect to the oil agent is 12.5 mass% or more and 25 mass% or less, the total amount of which with respect to the total amount of the oil agent and the powder is 1.0 mass% or more and 3.0 mass% or less, and the total amount of which with respect to the total amount of the powder is 1.4 mass% or more and 3.5 mass% or less,

[0114] In the production method of the solid powder cosmetic, the powder containing the component (A) is mixed with an oil-in-water emulsion containing the components (B), (C), and water to make a slurry, and the slurry is filled into a cosmetic container, after which the solvent is removed by suction.

[0115] <6> A production method of a solid powder cosmetic, characterized by containing the following components (A) to (C) in the solid powder cosmetic,

[0116] (A) a coloring pigment, the amount of which with respect to the total amount of the powder is 0.1 mass% or more and 34 mass% or less;

[0117] (B) an oil agent, the amount of which with respect to the total amount of the powder is 5 mass% or more and 27 mass% or less; and

[0118] (C) a surfactant, the total amount of which with respect to the oil agent is 12.5 mass% or more and 25 mass% or less, the total amount of which with respect to the total amount of the oil agent and the powder is 1.0 mass% or more and 3.0 mass% or less, and the total amount of which with respect to the total amount of the powder is 1.4 mass% or more and 3.5 mass% or less,

[0119] In the production method of the solid powder cosmetic, the powder containing the component (A) is mixed with an oil-in-water emulsion containing the components (B), (C), and water to make a slurry, and the slurry is filled into a cosmetic container, after which the solvent is removed by suction.

[0120] <7> A production method of a solid powder cosmetic, characterized by containing the following components (A) to (C) in the solid powder cosmetic,

[0121] (A) a coloring pigment, the amount of which with respect to the total amount of the powder is 0.1 mass% or more and 34 mass% or less;

[0122] (B) an oil agent, the amount of which with respect to the total amount of the powder is 5 mass% or more and 27 mass% or less; and

[0123] (C) a surfactant, the total amount of which with respect to the oil agent is 12.5 mass% or more and 25 mass% or less,

[0124] In the method for producing the solid powder cosmetic, a slurry is prepared by mixing a powder containing the component (A) with an oil-in-water emulsion containing the components (B), (C), and water, and the slurry is filled into a cosmetic container, after which the solvent is removed by suction so that the content of the solvent becomes 10% by mass or more and 25% by mass or less.

[0125] [Examples]

[0126] Next, the present application will be described in further detail by citing examples, but the present application is not limited to these examples.

[0127] [Method for producing molded product]

[0128] Examples 1 to 11 and Comparative Examples 1 to 5

[0129] To a beaker, pure water warmed to 60°C was added, and then the surfactant and oil agent that had been mixed beforehand were added. Then, using a HOMO Mixer MARK II 2.5 (manufactured by PRIMIX Corporation), the mixture was stirred at 6000 rpm for 5 minutes at 60°C, thereby preparing an oil-in-water emulsion. The pigment was added to the emulsion, and the mixture was stirred using a spatula until the pigment was wetted. Then, using a HOMO DISPER 2.5 (manufactured by PRIMIX Corporation) provided with a dispersing blade of 40 mm, the mixture was stirred at 4200 rpm for 5 minutes at 60°C, thereby obtaining a slurry. The obtained slurry was filled into a 27 mm x 27 mm metal tray, and, in a state in which two cloths were overlaid between a press plate provided with a suction hole and the metal tray, the solvent was removed by suction from the suction hole while pressing at a press pressure of 1 kN for 2 seconds and 2 times. Then, the solid powder cosmetic was produced by drying at 40°C for 24 hours, and the water content after drying was measured.

[0130] Comparative Example 6

[0131] To a beaker, pure water warmed to 60°C was added, and then the surfactant and oil agent that had been mixed beforehand were added. Then, using a HOMO Mixer MARK II 2.5 (manufactured by PRIMIX Corporation), the mixture was stirred at 6000 rpm for 5 minutes at 60°C, thereby preparing an oil-in-water emulsion. The pigment was added to the emulsion, and the mixture was stirred using a spatula until the pigment was wetted. Then, using a HOMO DISPER 2.5 (manufactured by PRIMIX Corporation) provided with a dispersing blade of 40 mm, the mixture was stirred at 4200 rpm for 5 minutes at 60°C, thereby obtaining a slurry. The obtained slurry was filled into a 27 mm x 27 mm metal tray, and, in a state in which two cloths were overlaid between a press plate provided with a suction hole and the metal tray, the solvent was removed by suction from the suction hole while pressing at a press pressure of 1 kN for 2 seconds and 2 times. Then, the solid powder cosmetic was produced by drying at 40°C for 24 hours, and the water content after drying was measured.

[0132] [Method for measuring hardness of molded product (before drying)]

[0133] The hardness of the molded product was measured using a RHEO METER COMPAC-100II (Sun Scientific) under conditions of a 2 mmφ jig, 1 mm intrusion.

[0134] [Method for measuring the moisture content of the molded product (before drying)]

[0135] 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.

[0136] [Equation 1]

[0137] Moisture content of the molded product (before drying) = ((mass of the molded product (before drying)) - (mass of the molded product (after drying)) / (mass of the molded product (before drying))

[0138] [Method for evaluating the uniformity of the surface of the molded product]

[0139] The surface of the molded product (after drying) was observed using a microscope, the height of the unevenness was measured, and evaluation was performed according to the following score.

[0140] Uniformity of the surface of the molded product (after drying)

[0141] 5 points: No unevenness of 0.3 mm or more was confirmed.

[0142] 4 points: Unevenness of 0.3 mm or more was confirmed.

[0143] 3 points: Unevenness of 0.4 mm or more was confirmed.

[0144] 2 points: Unevenness of 0.5 mm or more was confirmed.

[0145] 1 point: Unevenness of 0.6 mm or more was confirmed.

[0146] [Method for evaluating the performance of the molded product (after drying)]

[0147] Five cosmetic researchers evaluated the [amount taken for use when used] and [comfortable touch feeling in which the feeling of the powder is not felt] of the prepared solid powder cosmetic on a scale of 5 points, and the average score was taken as the score of the solid powder cosmetic.

[0148] [Amount taken for use when used]

[0149] 5 points: The amount taken for use when used was appropriate (Example 4).

[0150] 4 points: The amount taken for use when used was more than that of Comparative Example 4.

[0151] 3 points: Slightly more than Comparative Example 4 in the amount of powder taken and used when used with a dip.

[0152] 2 points: Slightly more than Comparative Example 4 in the amount of powder taken and used when used with a dip.

[0153] 1 point: Too little powder taken and used when used with a dip (Comparative Example 4).

[0154] [Comfortable touch feeling in which the touch feeling of the powder is difficult to feel]

[0155] 5 points: Very smooth, comfortable, and hardly feel the touch feeling of the powder (Example 5).

[0156] 4 points: Slightly less smooth and comfortable, and slightly feel the touch feeling of the powder compared to Example 5.

[0157] 3 points: Less smooth and comfortable, and feel the touch feeling of the powder compared to Example 5.

[0158] 2 points: Weak touch feeling of the powder compared to Comparative Example 3.

[0159] 1 point: Likewise, the touch feeling of the powder is quite strong (Comparative Example 3).

[0160] The formulation of the solid powdered cosmetic manufactured, the blending mass ratio of each component, the manufacturing conditions, and the evaluation results of the molded product are shown in Table 1.

[0161]

[0162] *1: Talc JA-68R (Hata Iron Works Co., Ltd.)

[0163] *2: Sericite FSE (Sankyo Company, Ltd.)

[0164] *3: Synthetic iron oxide R-516P (Titan Kogyo, Ltd.)

[0165] *4: Synthetic iron oxide LL-100 (Titan Kogyo, Ltd.)

[0166] *5: Synthetic iron oxide BL-100P (Titan Kogyo, Ltd.)

[0167] *6: METASHINE MT1040RS (Nippon Sheet Glass Co., Ltd.)

[0168] *7: RHEODOL 430V LOT2085 (Kao Corporation)

[0169] *8: SILKFLO 364 (Vantage Specialty Chemicals Inc.)

[0170] *9: NOMCORT HP-100 (Nisshin OilliO Group Inc.)

[0171] *10: P-RC-10SH (Nisshin OilliO Group Inc.)

[0172] As shown in Table 1, the solid powder cosmetic manufactured by mixing the powder containing component (A) with the oil-in-water emulsion containing component (B) (3% by mass or more and 28% by mass or less with respect to the total amount of the powder), component (C) (12% by mass or more and 30% by mass or less with respect to the total amount of the oil agent), and water in a slurry state, and then removing the solvent by suction after being filled into the cosmetic container, is a solid powder cosmetic having high surface uniformity of the molded product, appropriate amount of use at the time of use, very smooth, comfortable, and no feeling of the touch of the powder.

Claims

1. A method for producing a solid powder cosmetic, characterized in that, the solid powder cosmetic contains components (A) to (C) below, (A) a coloring pigment, which is 0.1 mass% or more and 34 mass% or less in the total amount of powder; (B) an oil agent, which is 3 mass% or more and 28 mass% or less with respect to the total amount of powder; and (C) a surfactant, which is 12 mass% or more and 30 mass% or less with respect to the total amount of the oil agent, in the method for producing the solid powder cosmetic, a powder containing the component (A) is mixed with an oil-in-water emulsion containing the components (B) and (C) and water to produce a slurry, which is filled into a cosmetic container, and then a solvent is removed by suction, followed by a drying process.

2. The method for producing a solid powder cosmetic according to claim 1, wherein, the content of the component (C) is 0.8 mass% or more and 3.0 mass% or less with respect to the total amount of the oil agent and the powder.

3. The method for producing a solid powder cosmetic according to claim 1, wherein, the content of the component (C) is 0.9 mass% or more and 3.9 mass% or less with respect to the total amount of the powder.

4. The method for producing a solid powder cosmetic according to any one of claims 1 to 3, wherein, the operation of removing the solvent by suction is performed so that the content rate of the solvent becomes 10 mass% or more and 25 mass% or less.

5. The method for producing a solid powder cosmetic according to any one of claims 1 to 3, wherein, the drying process after the removal of the solvent by suction is performed at 20 to 95°C.

6. The method for producing a solid powder cosmetic according to any one of claims 1 to 3, wherein, the peripheral speed of the tip of the stirring blade when the powder containing the component (A) is mixed with the oil-in-water emulsion containing the components (B) and (C) and water is 1 m / s or more and 30 m / s or less.

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