Powder solid cosmetic

Abstract

To provide a powder solid cosmetic which can be applied smoothly to the skin with a moist sense of use and also has excellent makeup durability and impact resistance, and a method for producing the same.SOLUTION: There are provided: a powder solid cosmetic which comprises (A) 30 mass% or more of mica based on the total amount of the cosmetic, (B) a hydrophilic spherical powder and (C) a cationic surfactant, wherein a part of the mica (A) is mica obtained by surface-treating (a-1) untreated mica with the cationic surfactant (C) and the hydrophilic spherical powder (B) contains 5 mass% or more of a spherical powder obtained by surface-treating untreated hydrophilic spherical powder (b1) with the cationic surfactant (C) based on the total amount of the cosmetic; and a method for producing the same.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a powder solid cosmetic. More specifically, it relates to a powder solid cosmetic that has a moist feeling in use and still has good makeup retention.

Background Art

[0002] Powder solid cosmetics have a structure in which powder components are mainly solidified with an oily binder and are widely used as a dosage form for makeup cosmetics such as foundation and eyeshadow. Many conventional powder solid cosmetics contain microplastic beads (MPB) for the purpose of imparting a smooth feeling in use and a soft touch. However, in view of the impact of MPB on the environment and the like, Patent Document 1 proposes to manufacture a solid powder cosmetic without containing MPB by wet molding (forming).

[0003] Patent Document 1 combines a powder subjected to a specific surface treatment of (A) fluorinated talc, (B) organopolysiloxane-treated silica, and (C) stearic acid-treated fine particle titanium oxide and a specific oil in a predetermined amount, and manufactures it by a wet method using water and alcohol or a volatile oil as a solvent, stating that a solid powder cosmetic excellent in smoothness and impact resistance during application can be obtained. Extender pigments such as talc and mica are raw materials that occupy a large part of solid powder cosmetics, and their properties also affect the usability of cosmetics. The cosmetic of Patent Document 1 is manufactured by a wet method, but it is necessary that the talc of the extender pigment to be blended is fluorinated.

[0004] On the one hand, it is known that when manufactured by a dry method, treating the powder surface with an ionic surfactant improves the smoothness, elongation, and moist feeling on the skin (Patent Document 2). Patent Document 3 describes that a powdery cosmetic containing a extender pigment surface-treated with a cationic surfactant is excellent in skin affinity, adhesion to the skin, and uniformity of the cosmetic film. However, since the cosmetics described in Patent Document 3 are manufactured by dry molding as in Patent Document 2, they may all feel powdery or dry, and the makeup retention and impact resistance are not sufficient.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

Disclosure of the Invention

Problems to be Solved by the Invention

[0006] An object of the present invention is to provide a powdery solid cosmetic that can be smoothly applied to the skin with a moist feeling and is excellent in makeup retention and impact resistance, and a method for producing the same.

Means for Solving the Problems

[0007] As a result of intensive studies to solve the above problems, the present inventors have found that the above problems can be solved by formulating mica as an extender pigment, subjecting at least a part of the mica to surface treatment with a cationic surfactant, and using a powdery solid cosmetic in which spherical powder surface-treated with a cationic surfactant is co-formulated, thus completing the present invention. The inventors have also found that the above powdery solid cosmetic can be preferably produced by a wet production method.

[0008] That is, the present invention relates to (A) mica in an amount of 30% by mass or more based on the total amount of the cosmetic; (B) hydrophilic spherical powder; and (C) a cationic surfactant, and at least a part of the (A) mica is mica obtained by surface-treating untreated mica with the (C) cationic surfactant, the (B) hydrophilic spherical powder contains, in an amount of 5% by mass or more based on the total amount of the cosmetic, spherical powder obtained by surface-treating untreated hydrophilic spherical powder with the (C) cationic surfactant, and provides a powder solid cosmetic characterized by this.

[0009] Furthermore, the present invention relates to (1) a step of dissolving or dispersing a mixture containing (A) mica, (B) hydrophilic spherical powder, (C) cationic surfactant, and optionally (D) oil in a polar solvent to form a slurry; (2) a step of filling the slurry into a container; and (3) a step of removing the polar solvent; and provides a method for producing the above-mentioned powder solid cosmetic.

Advantages of the Invention

[0010] The powder solid cosmetic of the present invention contains mica as a extender pigment and hydrophilic spherical powder such as silica, and by surface-treating at least a part of them with a cationic surfactant, it exhibits a moist and smooth feeling in use and is also excellent in impact resistance and makeup retention.

[0011] In addition, in the method for producing the powder solid cosmetic of the present invention, since the cationic surfactant dissolves in the solvent for slurry formation, all of the blended powder components will be surface-treated with the cationic surfactant throughout the production process. However, the cationic surfactant is particularly likely to adsorb on the surfaces of untreated mica and untreated hydrophilic spherical powder, so the untreated mica and hydrophilic spherical powder are selectively surface-treated. As a result, it is not necessary to surface-treat each powder component individually, and it is possible to easily produce a powder solid cosmetic having the above excellent properties.

Mode for Carrying Out the Invention

[0012] <Powder solid cosmetic> One aspect of the present invention is a powder solid cosmetic (hereinafter, also simply referred to as "cosmetic"), which contains (A) mica, (B) hydrophilic spherical powder, and (C) cationic surfactant as essential components.

[0013] (A) Mica The "mica" (also referred to as "component A") in the present invention may be any that is used in cosmetics. "Mica" (also referred to as "muscovite") is a powder composed of silicate minerals. As natural products, "muscovite (hard mica)" and "phlogopite (soft mica)" are widely used. As a synthetic product, "synthetic phlogopite (synthetic fluorophlogopite)" is known. In this specification, unless otherwise specified, "mica" is used as a name representing a superordinate concept that includes natural products and synthetic products.

[0014] The cosmetic of the present invention needs to contain mica (component A) in an amount of 30% by mass or more, preferably 35% by mass or more, more preferably 40% by mass or more based on the total amount of the cosmetic. The upper limit of the blending amount of mica (component A) is not particularly limited, but is usually 70% by mass or less, preferably 65% by mass or less, more preferably 60% by mass or less based on the total amount of the cosmetic. The blending amount range of mica (Component A) in the cosmetic of the present invention may be between the above-mentioned lower limit value and upper limit value. For example, it can be 30 to 70% by mass, 35 to 65% by mass, 40 to 60% by mass, or another combination of the lower limit value and the upper limit value with respect to the total amount of the cosmetic.

[0015] The "untreated mica" in this specification means mica of a natural product or a synthetic product that has not been surface-treated. The mica (Component A) in the cosmetic of the present invention includes "(a-1) mica obtained by surface-treating untreated mica with (C) a cationic surfactant" (also referred to as "cation-treated mica" or "Component a-1").

[0016] The "cation-treated mica" (Component a-1) may be untreated mica that has been surface-treated with a cationic surfactant in advance, or it may be mica that is surface-treated with a cationic surfactant during the manufacturing process of the cosmetic using untreated mica as a raw material. The "cation-treated mica" means that a cationic surfactant is attached (or adsorbed) to a part or all of the surface of untreated mica. For example, it can be produced by coating untreated mica with a solvent in which a cationic surfactant is dissolved and then evaporating the solvent. In contrast, a mixture of untreated mica and a powdery cationic surfactant in which mica and the surfactant are merely in contact does not correspond to "cation-treated mica". Also, mica that is treated with a surface hydrophobizing agent other than a cationic surfactant and then further surface-treated with a cationic surfactant does not correspond to the "cation-treated mica" (Component a-1) in the present invention.

[0017] In the cosmetic of the present invention, it is necessary that at least a part of the mica (Component A) is cation-treated mica (Component a-1). The blending amount of the cationically treated mica (Component a-1) in the cosmetic of the present invention is preferably 15 to 25% by mass based on the total amount of the cosmetic. The value of "(a-1) / (A)", which is the ratio (mass ratio) of the blending amount of the cationically treated mica (Component a-1) to the blending amount of mica (Component A), is preferably in the range of 0.3 to 1.0, more preferably 0.4 to 0.9, and even more preferably 0.5 to 0.8.

[0018] Mica (Component A) that does not correspond to the cationically treated mica (Component a-1) (also referred to as "Component a-2") includes untreated mica (a-2(1)); mica obtained by hydrophobically treating untreated mica with a treating agent other than a cationic surfactant (a-2(2)); and mica obtained by further surface-treating the hydrophobically treated mica of (a-2(2)) with a cationic surfactant (a-2(3)).

[0019] Here, the "treating agent other than a cationic surfactant" refers to a treating agent used for surface hydrophobization treatment of powders blended in cosmetics and is other than a cationic surfactant. Examples include silicones such as methylhydrogenpolysiloxane, dimethicone, and amodimethicone; fluorine compounds such as perfluoroalkyl phosphate esters and perfluoroalcohols; amino acids such as N-acylglutamic acid; lecithin; metal soaps such as magnesium stearate and aluminum octenyl succinate; fatty acids; alkyl phosphate esters; and the like.

[0020] The cosmetic of the present invention preferably contains, as component a-2, mica whose surface has been hydrophobized (the above a-2(2) and / or a-2(3)). Since their nuclear is mica, in this specification, they do not belong to (E) hydrophobic powders, but belong to (A) mica. On the other hand, if the cosmetic of the present invention contains a large amount of untreated mica (a-2(1)), it may feel powdery, or the makeup retention and impact resistance may decrease. Therefore, the blending amount of untreated mica (a-2(1)) in the cosmetic of the present invention is 3% by mass or less, preferably 2% by mass or less, more preferably 1% by mass or less based on the total amount of the cosmetic, and the cosmetic of the present invention includes an embodiment that does not contain untreated mica (a-2(1)).

[0021] (B) Hydrophilic spherical powder The "hydrophilic spherical powder" (also referred to as "component B") in the present invention refers to a powder whose shape is substantially spherical and whose surface exhibits hydrophilicity. Substantially spherical means a true sphere or a prolate ellipsoid, and the ratio of the major axis to the minor axis (ellipticity) is preferably 1.5 or less, more preferably 1.2 or less, still more preferably 1.1 or less of the powder. Hydrophilicity can be defined, for example, as a powder having a contact angle of 90 degrees or less when water is dropped on the surface of a molded body obtained by pressing the powder with a tablet press and the contact angle is measured. The particle size of the hydrophilic spherical powder (component B) is not particularly limited, but spherical powders having an average particle size of preferably 1 to 20 μm, more preferably 5 to 10 μm are used. The average particle size in this specification is the arithmetic mean value of the particle diameters measured by microscopic observation.

[0022] As the hydrophilic spherical powder, spherical silica powder, starch, spherical glass beads, spherical cellulose, or polymer powders such as spherical nylon powder and spherical urethane powder hydrophilized by introducing hydroxyl groups or carboxyl groups on the surface can be used. In the cosmetic of the present invention, it is particularly preferable to use spherical powder of silica (silicic anhydride).

[0023] The blending amount range of the hydrophilic spherical powder (Component B) in the cosmetic of the present invention is preferably 5 to 25% by mass, more preferably 7 to 20% by mass, and even more preferably 10 to 15% by mass based on the total amount of the cosmetic.

[0024] In this specification, the "untreated hydrophilic spherical powder" means a hydrophilic spherical powder that has not been surface-treated. The hydrophilic spherical powder (Component B) in the cosmetic of the present invention includes "(b-1) a hydrophilic spherical powder obtained by surface-treating an untreated hydrophilic spherical powder with a (C) cationic surfactant" (also referred to as "cation-treated spherical powder" or "Component b-1").

[0025] The "cation-treated spherical powder" (Component b-1) may be an untreated hydrophilic spherical powder that has been surface-treated with a cationic surfactant in advance, or may be one that is surface-treated with a cationic surfactant during the manufacturing process of the cosmetic using an untreated hydrophilic spherical powder as a raw material. The "cation-treated spherical powder" means one in which a cationic surfactant has adhered (or adsorbed) to part or all of the surface of the untreated hydrophilic spherical powder. For example, it can be produced by coating the untreated hydrophilic spherical powder with a solvent in which a cationic surfactant is dissolved and then evaporating the solvent. In contrast, a mixture of an untreated hydrophilic spherical powder and a powdery cationic surfactant in which the hydrophilic spherical powder and the surfactant are merely in contact does not correspond to the "surface-treated hydrophilic spherical powder". Also, an untreated hydrophilic spherical powder treated with a surface hydrophobizing agent other than a cationic surfactant and then further surface-treated with a cationic surfactant does not correspond to the "cation-treated spherical powder" (Component b-1) in the present invention.

[0026] In the cosmetic of the present invention, the hydrophilic spherical powder (Component B) contains the cation-treated spherical powder (Component b-1), and the blending amount of the cation-treated spherical powder (Component b-1) needs to be 5% by mass or more based on the total amount of the cosmetic, preferably 7% by mass or more, and more preferably 9% by mass or more. When the blending amount of the cation-treated spherical powder (Component b-1) is less than 5% by mass, a smooth feeling of use cannot be obtained, and a powdery feeling will be felt. The upper limit value of the blending amount of the cation-treated spherical powder is not particularly limited, but is usually 20% by mass or less, preferably 15% by mass or less.

[0027] The ratio (mass ratio) of the blending amount of the cation-treated spherical powder (Component b-1) to the blending amount of the hydrophilic spherical powder (Component B) in the cosmetic of the present invention, "(b-1) / (B)", is preferably in the range of 0.6 to 1.0, more preferably 0.7 to 0.9, and even more preferably 0.75 to 0.85.

[0028] The spherical powder that is the hydrophilic spherical powder (Component B) and does not correspond to the cation-treated spherical powder (Component b-1) (also referred to as "Component b-2") includes the untreated hydrophilic spherical powder (b-2(1)); the spherical powder obtained by hydrophobizing the untreated hydrophilic spherical powder with a treating agent other than a cationic surfactant (b-2(2)); and the spherical powder obtained by further surface-treating the hydrophobized spherical powder of (b-2(2)) with a cationic surfactant (b-2(3)). The "treating agent other than a cationic surfactant" is as described above.

[0029] The cosmetic of the present invention preferably contains, as component b-2, spherical powder having a hydrophobized surface (the above b-2(2) and / or b-2(3)). Since their mother nucleus is a hydrophilic spherical powder, in this specification, they do not belong to (E) hydrophobized powder and belong to (B) hydrophilic spherical powder. On the other hand, if the cosmetic of the present invention contains a large amount of untreated hydrophilic powder (b-2(1)), the surface of the cosmetic tends to become hard when manufactured by wet molding, and the take-out of the cosmetic tends to deteriorate. Therefore, the blending amount of the untreated hydrophilic powder (b-2(1)) in the cosmetic of the present invention is 3% by mass or less, preferably 2% by mass or less, more preferably 1% by mass or less based on the total amount of the cosmetic, and the cosmetic of the present invention includes an embodiment that does not contain the untreated hydrophilic powder (b-2(1)).

[0030] (C) Cationic surfactant The cationic surfactant used in the present invention is not particularly limited as long as it can be blended in cosmetics. Among them, the quaternary ammonium salt represented by the following general formula (I) is preferable.

[0031] [Chemical formula] [In the formula, R 1 and R 2 are each independently a linear or branched alkyl group having 6 to 35 carbon atoms, R 3 and R 4 are each independently a hydrogen atom or a linear or branched alkyl group having 1 to 3 carbon atoms, and X - is a halogen ion or an organic anion.] Among them, a quaternary ammonium salt in which R 1 and R 2 are each independently a linear or branched alkyl group having 6 to 35 carbon atoms, R 3 and R 4 are each independently a hydrogen atom or a linear or branched alkyl group having 1 to 3 carbon atoms, and X - is a halogen ion or an organic anion is preferable.

[0032] More specifically, R is a linear or branched alkyl group having 6 to 35 carbon atoms 1 is, for example, hexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group, octadecyl group, nonadecyl group, icosyl group, henicicosyl group, docosyl group, tricosyl group, tetracosyl group, pentacosyl group, hexacosyl group, heptacosyl group, octacosyl group, nonacosyl group, triacontyl group, hentriacontyl group, dotriacontyl group, tritriacontyl group, tetratriacontyl group, pentatriacontyl group, myristyl group, palmitoleyl group, oleyl group, linoleyl group, linolenyl group, ricinoleyl group, isostearyl group, and the like. R 2 , R 3 and R 4 are, as described above, the same or different and are a hydrogen atom or a linear or branched alkyl group having 1 to 3 carbon atoms. Further, X is a halogen ion such as chlorine, iodine, bromine, or an organic anion such as methosulfate, etosulfate, methophosphate, etophosphate, and the like.

[0033] Particularly preferred cationic surfactants in the present invention include distearyldimethylammonium chloride (= distearldimonium chloride) in which two of R 1 , R 2 , R 3 and R 4 are alkyl groups having 18 carbon atoms and the remaining two are methyl groups and X is chlorine, behenyltrimethylammonium chloride (= behentrimonium chloride) in which one of R 1 , R 2 , R 3 and R 4 is an alkyl group having 22 carbon atoms and the remaining three are methyl groups and X is chlorine, R 1 , R 2 , R 3 and R 4One of them is an alkyl group having 18 carbon atoms, the remaining three are methyl groups, and X is chlorine, such as stearyltrimethylammonium chloride (= steartrimonium chloride), R 1 R 2 R 3 and R 4 One of them is an alkyl group having 16 carbon atoms, the remaining three are methyl groups, and X is chlorine, such as cetyltrimethylammonium chloride. Among these, distearyldimonium chloride is preferably used.

[0034] The cationic surfactant (Component C) in the cosmetic of the present invention preferably exists in a state of being attached (or adsorbed) to the surface of the powder. In particular, it is preferable that the cationic surfactant is mainly attached (or adsorbed) to the surfaces of untreated mica and untreated hydrophilic spherical powder (also referred to as "surface coating state").

[0035] For example, cationically treated mica and cationically treated spherical powder are obtained by surface-treating untreated mica and untreated hydrophilic spherical powder with a cationic surfactant in advance, and a cosmetic in which the cationic surfactant exists in a surface coating state can be obtained by producing from the raw materials containing them using wet molding or dry molding.

[0036] Alternatively, a cosmetic in which the cationic surfactant exists in a surface coating state can be obtained by producing using wet molding in which a slurry is formed with a solvent in which the cationic surfactant is dissolved from a raw material containing untreated mica and untreated hydrophilic spherical powder. In this method, the cationic surfactant also adheres to the surfaces of powders other than untreated mica and untreated hydrophilic spherical powder, but due to the hydrophobicity / hydrophilicity and surface charge of the powder surface, etc., it is considered that the cationic surfactant preferentially adheres to the surface of untreated mica or untreated hydrophilic spherical powder rather than the surface of the hydrophobically treated powder.

[0037] The blending amount of the cationic surfactant (Component C) in the cosmetic of the present invention is preferably 0.1 to 2.0% by mass, more preferably 0.3 to 1.5% by mass, and even more preferably 0.5 to 1.2% by mass based on the total amount of the cosmetic. If the blending amount is less than 0.1% by mass, a smooth and moist feeling of use may not be obtained.

[0038] In addition to the above (A) mica, (B) hydrophilic spherical powder, and (C) cationic surfactant, the cosmetic of the present invention can be blended with other components that can be blended in solid powder cosmetics within a range that does not inhibit the effects of the present invention.

[0039] (D) Oil The oil (also referred to as "Component D") blended in the cosmetic of the present invention may be any oil used in ordinary cosmetics and is not particularly limited. For example, as the oil that is liquid at normal temperature (25°C), hydrocarbon oils, higher fatty acids, ester oils, higher alcohols, silicone oils, fluorine-based oils such as perfluoroalkyl ethers, and oily ultraviolet absorbers can be mentioned. Further, it may contain an oil that is solid or semi-solid at normal temperature (25°C) ("solid oil or semi-solid oil").

[0040] Examples of hydrocarbon oils include hydrogenated polydecene, liquid paraffin, ozokerite, squalane, pristane, paraffin, squalene, petrolatum, and the like. Examples of ester oils include triethylhexanoin, isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, glycerin di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, pentaerythritol tetra-2-ethylhexanoate, glycerin tri-2-ethylhexanoate, glycerin trioctanoate, glycerin triisopalmitate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, glycerin trimyristate, glyceride di-2-heptylundecanoate, methyl ester of castor oil fatty acid, oleyl oleate, acetoglyceride, 2-heptylundecyl palmitate, diisobutyl adipate, 2-octyldodecyl N-lauroyl-L-glutamate, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, 2-ethylhexyl succinate, triethyl citrate, and the like.

[0041] Examples of silicone oils include chain polysiloxanes (e.g., dimethylpolysiloxane, etc.); cyclic polysiloxanes (e.g., octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, etc.), modified silicones such as methylphenylpolysiloxane, diphenylpolysiloxane, diphenylsiloxyphenyltrimethicone, etc. (phenyl-modified silicone, polyether-modified silicone, alkyl-modified silicone, fluorine-modified silicone, etc.). Examples of solid or semi-solid oil components include semi-solid oils such as macadamia nut oil polyglyceryl-6 esters behenate, and paste-like oils such as silicone elastomer paste.

[0042] The blending amount of the oil component (Component D) in the cosmetic of the present invention is not particularly limited, but is usually preferably 1 to 20% by mass, more preferably 3 to 15% by mass, and still more preferably 5 to 12% by mass based on the total amount of the cosmetic.

[0043] (E) Hydrophobized powder It is preferable to further blend a powder having a hydrophobized surface (referred to as "hydrophobized powder" or "Component E") in the cosmetic of the present invention. The "hydrophobized powder" (Component E) in the present invention includes a powder obtained by hydrophobizing the surface of an untreated powder (excluding mica and hydrophilic spherical powder) with an arbitrary treating agent (including a cationic surfactant), and a powder obtained by further surface-treating a powder whose surface has been hydrophobized with a treating agent other than a cationic surfactant with a cationic surfactant. The "treating agent other than a cationic surfactant" is as described above. That is, a powder whose mother nucleus (base material) is (A) mica or (B) hydrophilic spherical powder is not included in the "hydrophobized powder" (Component E).

[0044] Examples of the powder serving as the mother nucleus of the hydrophobized powder (Component E) include extender pigments (excluding mica), inorganic pigments (white pigments, colored pigments), organic pigments, pearlescent agents, ultraviolet scattering agents, and other inorganic and organic powders (excluding hydrophilic spherical powder). Specific examples include, but are not limited to, the following. Boron nitride, barium sulfate, kaolin, sericite, talc, calcined talc, calcined sericite, vermiculite, magnesium carbonate, calcium carbonate, aluminum silicate, barium silicate, calcium silicate, magnesium silicate, strontium silicate, metal tungstate, magnesium, zeolite, barium sulfate, calcined calcium sulfate (calcined gypsum), calcium phosphate, fluorapatite, hydroxyapatite, ceramic powder, metal soap (e.g., magnesium myristate, zinc myristate, calcium palmitate, aluminum stearate, etc.), photochromic titanium oxide (titanium dioxide sintered with iron oxide), reduced zinc white; organic powder (e.g., starch powder, lauroyl lysine powder, polyamide resin powder (nylon powder), polyethylene powder, polystyrene powder, copolymer resin powder of styrene and acrylic acid, benzoguanamine resin powder, polytetrafluoroethylene powder, etc.); inorganic white pigment (e.g., titanium dioxide, zinc oxide, etc.); inorganic red pigment (e.g., red iron oxide (vermilion), iron titanate, etc.); inorganic brown pigment (e.g., γ-iron oxide, etc.); inorganic yellow pigment (e.g., yellow iron oxide, loess, etc.); inorganic black pigment (e.g., black iron oxide, lower titanium oxide, etc.); inorganic purple pigment (e.g., manganese violet, cobalt violet, etc.); inorganic green pigment (e.g., chromium oxide, chromium hydroxide, cobalt titanate, etc.); inorganic blue pigment (e.g., ultramarine, navy blue, etc.); pearlescent agent (e.g., bismuth oxychloride, fish scale foil, etc.); metal powder pigment (e.g., aluminum powder, copper powder, etc.); organic pigment such as zirconium, barium or aluminum lake (e.g., Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 228, Red No. 405, Orange No. 203, Orange No. 204, Yellow No. 205, Yellow No. 401, and Blue No. 404, Red No. 3, Red No. 104, Red No. 106, Red No. 227, Red No. 230, Red No. 401, Red No. 505, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No. 203, Green No. 3 and Blue No. 1, etc.); natural pigment (e.g., chlorophyll, β-carotene, etc.); ultraviolet scattering agent (fine particle titanium oxide, fine particle zinc oxide, etc.).

[0045] The cosmetic of the present invention preferably contains 5 to 30% by mass, more preferably 10 to 25% by mass, and even more preferably 15 to 22% by mass of the hydrophobized powder (Component E) based on the total amount of the cosmetic. In addition, when talc is blended in the cosmetic of the present invention, the smoothness when applied may decrease, and it may have a powdery feel. Therefore, the blending amount of talc in the cosmetic of the present invention is preferably 10% by mass or less, more preferably 5% by mass or less. The cosmetic of the present invention includes an embodiment that does not contain talc.

[0046] Since the cosmetic of the present invention contains a predetermined amount of the hydrophilic spherical powder (Component b-1) surface-treated with a cationic surfactant, it is excellent in smoothness, moist feeling when applied, and makeup retention. Therefore, the cosmetic of the present invention also includes an embodiment that does not contain microplastic beads (MPB), which have conventionally been blended for improving usability.

[0047] Examples of other optional components that can be blended in the cosmetic of the present invention include, but are not limited to, humectants, antioxidants, preservatives, various drugs, fragrances, and the like.

[0048] <Manufacturing Method> Another aspect of the present invention is (1) A step of dissolving or dispersing a mixture containing (A) mica, (B) hydrophilic spherical powder, and (C) cationic surfactant in a polar solvent to form a slurry; (2) A step of filling the slurry into a container; and (3) A step of removing the polar solvent; which is a method for manufacturing a powdered solid cosmetic.

[0049] The manufacturing method of the present invention is a method for manufacturing a solid powdered cosmetic using wet molding with a polar solvent. In the mixture in the step (1), (D) oil, (E) hydrophobized powder, and other optional components may be added, and the slurry is formed by heating as necessary. Specifically, a solvent and a raw material mixture are charged into devices such as a disperser, a homogenizer, a planetary mixer, a combi-mixer (registered trademark), an azi-homo mixer, and a twin-screw kneader, and mixed / dispersed.

[0050] In the production method of the present invention, it is preferable to use water or a mixture of water and an aqueous solvent as the polar solvent. Examples of the aqueous solvent include low-boiling alcohols such as ethyl alcohol, propyl alcohol, isopropyl alcohol, and butyl alcohol. As the polar solvent, it is preferable to use a solvent mainly composed of water. That is, only water or an alcohol aqueous solution in which a low-boiling alcohol is dissolved in water is preferable, and the concentration of the low-boiling alcohol in the alcohol aqueous solution is preferably 50% by mass or less.

[0051] In the production method of the present invention, in the slurry formed by dissolving or dispersing a mixture containing (A) mica, (B) hydrophilic spherical powder, and (C) cationic surfactant in a polar solvent, since (C) the cationic surfactant is dissolved in the polar solvent, the surfaces of all powder components including (A) mica and (B) hydrophilic spherical powder are surface-treated with the cationic surfactant. As a result, the makeup retention is further improved as compared with the case of production by dry molding.

[0052] The blending ratio (mass ratio) of the raw material mixture and the solvent in the slurry formation step is preferably in the range of 1 / 7 to 1 / 11, more preferably 1 / 9 to 1 / 11, in terms of the value of raw material mixture (mass) / solvent (mass).

[0053] Next, in step (2), the slurry obtained in step (1) is filled into a container and compression-molded while removing the solvent (step (3)). The method for carrying out the compression molding is not particularly limited, and a known method can be used. For example, the slurry is filled into a container such as an inner dish made of metal or resin by injection filling or the like, and the solvent in the filled slurry is removed by suction or absorption while compression-molding to obtain the cosmetic of the present invention.

[0054] The cosmetic according to the present invention can be provided in the form of a powder solid cosmetic having a smooth and moist feeling when applied, for example, in the form of makeup cosmetics such as foundation, eyeshadow, cheek color, body powder, perfume powder, baby powder, pressed powder, deodorant powder, and white face powder.

Examples

[0055] The present invention will be described in more detail with specific examples below, but the present invention is not limited to the following examples. In addition, the blending amounts in the following examples indicate mass% based on the total amount of the cosmetic unless otherwise specified.

[0056] Powder solid cosmetics having the formulations described in Tables 1 and 2 below were prepared. In the tables, examples described as "wet" in the "manufacturing method" column were manufactured using the following <wet molding method>, and examples described as "dry" were manufactured using the following <dry molding method>. The symbols described in the tables have the following meanings. (*1) Dimethyldistearylammonium chloride-treated mica (*2) Amodimethicone-treated mica (*3) Magnesium stearate-treated synthetic phlogopite (*4) Dimethicone-treated silica (*5) Dimethyldistearylammonium chloride-treated mica (*6) Aluminum octenyl succinate-treated starch powder

[0057] <Wet molding method> (A) Components 1 to 26 are mixed using a Henschel mixer, and further pulverized using a pulperizer to obtain a uniform mixture. (B) An equal amount of a solvent (water) is added to the mixture of (A), and the mixture is mixed using a disperser to obtain a slurry. (C) The slurry of (B) is filled in a middle dish, the solvent is removed by suction, and then dried to obtain a solid powder cosmetic.

[0058] <Dry molding method> (A) Components 1 to 17 are mixed. Uniformly mix components 18 - 26 in (B). Add (B) to (A) in (C) and mix uniformly. In (D), pulverize (C) and compress - mold it in a middle - sized dish to obtain a solid - powder cosmetic.

[0059] For the cosmetics of each example, (1) usability, (2) makeup retention, (3) impact resistance, and (4) moldability were evaluated. The evaluation methods are as follows. The evaluation results for the cosmetics of each example are shown in Table 2 below.

[0060] (1) Usability evaluation Five professional cosmetic panels were asked to apply the solid - powder cosmetics of each example on the skin, and a five - level evaluation was conducted on "smoothness when applying", "absence of powdery feeling", "gloss", and "moistness". A: Very good B: Good C: Normal (standard) D: Bad E: Very bad

[0061] (2) Makeup retention evaluation Five professional cosmetic panels were asked to apply the solid - powder cosmetics of each example on the skin. Three professional evaluators conducted a five - level evaluation based on the "sagging evaluation" and "greasy evaluation" three hours later according to the following evaluation criteria. A: Very good (no sagging or very little sagging, no greasiness or very little greasiness) B: Good C: Normal (standard) D: Bad E: Very bad (sagging and greasiness are very obvious)

[0062] (3) Impact resistance evaluation The solid - powder cosmetics of each example (number of samples N = 3) were set in a cosmetic compact container, and the container was dropped onto a metal plate from a height of 30 cm with the cosmetic surface facing downwards, and the number of times until it cracked was examined. For each example, based on the average value of the number of times the three samples cracked, the judgment was made as follows. A: 7 times or more B: 5 times or more and less than 7 times C: 3 times or more and less than 5 times D: Less than 3 times

[0063] (4) Moldability For the solid powder cosmetics of each example, a resin tray was filled with slurry in the case of wet type or powder cosmetics in the case of dry type, and pressure molding was performed. The states during and after molding were evaluated based on the following evaluation criteria. <Wet type> A: The slurry has appropriate hardness and is very easy to mold. B: There is a slight leakage from the tray during molding, but molding is possible. C: The slurry is a bit soft and there is leakage of the contents, but molding is possible. D: The slurry is soft and the contents leak out, making molding difficult. E: Almost all of the contents leak out after molding and molding is impossible. <Dry type> A: The powder contains an appropriate amount of oil and is easy to mold. B: The oil content of the powder is slightly less, but molding is possible. C: Normal D: The obtained molded body is brittle and difficult to mold. E: It remains powdery even after pressing and cannot be molded.

[0064]

Table 1

[0065]

Table 2

[0066] According to the results shown in Table 1, the cosmetic of the present invention in which (A) the total blending amount of mica is 30% by mass or more, (a-1) cation-treated mica is included, and (b-1) cation-treated spherical powder (cation-treated silica) is blended in an amount of 5% by mass or more was satisfactory in all of the evaluated items. Among them, Examples 1, 2, 4, and 5 in which the blending amount of (a-1) cation-treated mica was 15% by mass or more were superior to Example 3 in which the blending amount of (a-1) cation-treated mica was 10% by mass in terms of a moist feeling of use and makeup retention. Further, Examples 1, 4, and 5 in which the blending amount of (a-1) cation-treated mica was 25% by mass or less were superior in smoothness when applied as compared with Example 2 in which the blending amount of (a-1) cation-treated mica exceeded 30% by mass.

[0067] Note that there was no significant difference between the case where the treatment of untreated mica and untreated hydrophilic spherical powder (silica) with a cationic surfactant was carried out in the wet molding process (Examples 1 to 4) and the case where raw materials subjected to surface treatment in advance were used (Example 5), and it was confirmed that good cosmetics could be obtained by any method. On the other hand, when a cosmetic having the same formulation as that of Example 1 was produced by dry molding, that is, when the cationic surfactant (distearyldimonium chloride) did not adsorb (attach) to the surfaces of mica and the hydrophilic spherical powder and was present in the solid state in the cosmetic, the results were inferior in all of the evaluated items (Comparative Example 1).

[0068] On the other hand, in the results shown in Table 2, Comparative Example 2 that did not contain (a-1) cation-treated mica and (b-1) cation-treated spherical powder received low evaluations in all items, and satisfactory cosmetics could not be obtained even in Comparative Examples 3 and 7 that did not contain either one of them. Further, Comparative Example 6 in which the blending amount of (b-1) cation-treated spherical powder was less than 5% by mass was particularly lacking in smoothness when applied and had a powdery feel. Furthermore, Comparative Example 4 in which the blending amount of mica in the cosmetic was less than 30% by mass received low-level evaluations in all items, and even when the total blending amount of mica and talc was 30% by mass or more, a moist feeling of use, smoothness when applied, and gloss could not be obtained if the blending amount of mica was less than 30% by mass (Comparative Example 5).

Claims

1. (A)Mica of 30% by mass or more based on the total amount of the cosmetic; (B)Hydrophilic spherical powder; and (C)Containing a cationic surfactant, At least a part of the mica of (A) is mica obtained by surface-treating untreated mica of (a-1) with the cationic surfactant of (C), The hydrophilic spherical powder of (B) contains 5% by mass or more, based on the total amount of the cosmetic, of spherical powder obtained by surface-treating untreated hydrophilic spherical powder of (b-1) with the cationic surfactant of (C), A powder solid cosmetic characterized by the above.

2. The cosmetic according to claim 1, wherein the blending amount of mica obtained by surface-treating untreated mica of (a-1) with the cationic surfactant of (C) is 15 to 25% by mass based on the total amount of the cosmetic.

3. The cosmetic according to claim 1 or 2, wherein the cationic surfactant of (C) is a quaternary ammonium salt represented by the following general formula (I): [wherein, R １ and R ２ are each independently a linear or branched alkyl group having 6 to 35 carbon atoms, R ３ and R ４ are each independently a hydrogen atom or a linear or branched alkyl group having 1 to 3 carbon atoms, and X － is a halogen ion or an organic anion]]

4. The cosmetic according to claim 3, wherein the quaternary ammonium salt is distearyldimonium chloride.

5. The cosmetic according to claim 1 or 2, wherein the hydrophilic spherical powder of (B) is silica.

6. The cosmetic according to claim 1 or 2, further containing (D) an oil component.

7. The cosmetic according to claim 1 or 2, further containing (E) a hydrophobized powder (excluding powders having mica of (A) and hydrophilic spherical powder of (B) as nuclei).

8. The cosmetic according to claim 1 or 2, wherein the blending amount of talc is 5% by mass or less.

9. (1)A step of dissolving or dispersing a mixture containing (A) mica, (B) hydrophilic spherical powder, and (C) a cationic surfactant in a polar solvent to form a slurry; (2)A step of filling the slurry into a container; and (3)A step of removing the polar solvent; A method for producing a powder solid cosmetic according to claim 1, including the above steps.

10. The production method according to claim 9, wherein the mixture in the step (1) further contains (D) an oil component.

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