Powder solid cosmetic

Abstract

To provide a powdery solid cosmetic good in impact resistance and sense of use and excellent in color development, and to provide a method for producing the same.SOLUTION: A powder solid cosmetic comprising (A) a wax powder, (B) a powder ingredient (excluding the (A) wax powder), and (C) an oil ingredient, wherein the (B) powder ingredient comprises (b1) nonporous silica, and the (C) oil ingredient comprises 15 to 50% by mass of a non-volatile dimethicone having a (c1) viscosity of 10cs or less relative to the total amount of the cosmetic, and a method for producing the powder solid cosmetic using wet molding.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a solid cosmetic product in powder form, and more particularly to a solid cosmetic product in powder form that is excellent in usability and impact resistance, and also has good color development, and a method for producing the same. [Background technology]

[0002] Solid cosmetic powders have a structure in which powder ingredients are solidified with a primarily oily binder, and are widely used as a dosage form for makeup cosmetics such as foundation, eye shadow, etc. In recent years, solid cosmetic powders have been required to have not only basic cosmetic properties such as makeup effect and long-lasting makeup, but also excellent product properties such as impact resistance and mass productivity, as well as ease of use (feel when used), such as ease of removal from containers and high flexibility during use.

[0003] Patent Document 1 describes that a solid cosmetic preparation containing (A) an oil that is liquid at room temperature, (B) a powder, (C) a partially crosslinked organopolysiloxane polymer, and (D) a dextrin fatty acid ester of a specific structure, in which the mass ratio of (A) to (B) is adjusted within a specified range, has high elasticity, uniformity of the cosmetic film, impact resistance, etc.

[0004] However, when a silicone elastomer powder such as the partially crosslinked organopolysiloxane polymer (C) in Patent Document 1 is blended into a powder solid cosmetic, the color development of the cosmetic tends to decrease. On the other hand, reducing the amount of silicone elastomer powder to improve color development causes a problem of a significant decrease in the impact resistance of the cosmetic.

[0005] Powder solid cosmetics are generally produced using either a molding method (dry molding) in which the powder is filled into a tray and pressed in a mold to harden, or a method (wet molding) in which a solvent is added to the raw material to form a slurry, which is filled into a tray and molded by drying and evaporating the solvent after pressing. The solid cosmetic of Patent Document 1 is described as being suitable for production using the dry molding method (paragraph 0059).

[0006] The wet molding method has the advantage that the raw material is filled into the inner plate in a slurry state, allowing stable molding regardless of the shape of the inner plate, and that a cosmetic product with a soft feel can be obtained. However, a heat drying process is required to remove the solvent added to form the slurry, and the process is more complicated than the dry molding method, making it unsuitable for mass production in some cases.

[0007] In conventional wet molding, volatile solvents such as water, lower alcohols, or volatile hydrocarbons are commonly used to form the slurry, and the solvent is removed by a heat drying process after suction pressing. Recently, there have been examples of using a non-volatile oil (silicone oil) as a solvent to form the slurry in the wet molding process (Patent Document 2). In the manufacturing method of Patent Document 2, the solvent is removed in liquid form by being absorbed by an absorbent (paper or nonwoven fabric) pressed against the opening of the container. However, Patent Document 3 states that the manufacturing method of Patent Document 2 results in insufficient solvent removal, and that the solvent (non-volatile silicone oil) remaining in the molded cosmetic material may degrade the quality of the cosmetic material. Patent Document 3 also claims that the removal of the solvent (non-volatile silicone oil) is facilitated by blending a specific non-volatile hydrocarbon oil with the oil that constitutes the cosmetic material. However, the cosmetics of Patent Documents 2 and 3 contain wax and are manufactured through a heating process to dissolve (melt) the wax. However, heating causes another problem: the oil becomes cloudy and the color development is reduced. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-190838 [Patent Document 2] Japanese Patent Application Laid-Open No. 2007-291074 [Patent Document 3] WO2022 / 220027 specification DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0009] An object of the present invention is to provide a powdery solid cosmetic product that has good impact resistance, good feel in use, and excellent color development, and a method for producing said cosmetic product using a wet molding method. [Means for solving the problem]

[0010] As a result of extensive research aimed at solving the above-mentioned problems, the present inventors have discovered that a powdered solid cosmetic preparation prepared to contain a powdered wax, an oil component containing a predetermined amount of non-volatile dimethicone, and non-porous silica powder has good impact resistance and a pleasant feel when used, and also has excellent cosmetic appearance and color development after application, which has led to the completion of the present invention.

[0011] That is, the present invention provides: (A) wax powder; (B) powder components (but excluding (A) wax powder); and (C) Contains oil, the (B) powder component contains (b1) nonporous silica, The present invention provides a solid cosmetic in powder form, characterized in that the (C) oil component contains (c1) non-volatile dimethicone having a viscosity of 10 cs or less in an amount of 15 to 50 mass % relative to the total amount of the cosmetic. [Effects of the Invention]

[0012] In the solid cosmetic powder preparation of the present invention, the nonporous silica powder does not excessively absorb oil, so a large amount of oil remains unconstrained, while the lipophilicity of the wax powder allows the oil to be appropriately retained within the cosmetic preparation. Therefore, the solid cosmetic powder preparation of the present invention spreads well upon application, has a moist feel, and is also excellent in impact resistance and color development. DETAILED DESCRIPTION OF THE INVENTION

[0013] The solid cosmetic in powder form of the present invention (hereinafter simply referred to as "cosmetic") contains (A) wax powder, (B) powder component (excluding (A) wax powder), and (C) oil component. The (B) powder component contains (b1) nonporous silica, and the (C) oil component contains a predetermined amount of (c1) nonvolatile dimethicone.

[0014] (A) Wax powder The wax powder (A) (hereinafter also referred to as "Component A") in the cosmetic of the present invention is a powdered wax. The wax powder (Component A) can be produced by a method of mechanically pulverizing a wax that is solid at room temperature (25°C), or by a method of dissolving the wax in a volatile solvent and spray-drying it. Examples of methods for mechanically pulverizing wax include methods using pulverizing devices such as a jet mill, hammer mill, pin mill, ball mill, and bead mill.

[0015] The wax constituting the wax powder (component A) preferably has a melting point of 40 to 200°C, preferably about 85 to 125°C, and is poorly compatible with non-volatile dimethicone. Specific examples include synthetic waxes, beeswax, carnauba wax, candelilla wax, montan wax, paraffin wax, ozokerite, ceresin, microcrystalline wax, polyethylene wax, ethylene-propylene copolymer wax, Fischer-Tropsch wax, sunflower seed wax (sunflower wax), rice bran wax, Japan wax, hydrogenated jojoba oil, behenyl behenate, glyceryl tribehenate, jojoba ester, etc. Among these, hydrocarbon waxes such as synthetic wax, polyethylene wax, ethylene-propylene copolymer wax, paraffin wax, Fischer-Tropsch wax, and microcrystalline wax are preferred.

[0016] The average particle size of the wax powder (component A) used in the cosmetic of the present invention is not particularly limited, but is generally preferably in the range of 0.1 to 50 μm, more preferably 5 to 40 μm, and even more preferably 6 to 25 μm. As component A of the cosmetic of the present invention, one type of wax powder may be used alone, or two or more types of wax powder may be used in combination.

[0017] Commercially available wax powders (component A) may be used, such as PRESS-AID-SP (synthetic wax; average particle size 6 to 7.5 μm) and PRESS-AID-XP (synthetic wax; average particle size 3 μm) manufactured by PRESPERSE, PE wax manufactured by SHAMROCK, carnauba wax powder manufactured by Cerarica NODA, and polishing wax (carnauba wax) and rubriwax (hydrogenated castor oil or hydrogenated rapeseed oil) manufactured by Freund Corporation.

[0018] Unless otherwise specified, the average particle size of a powder in this specification refers to the volume average particle size (D50) measured by adding the powder to a solvent such as ethanol, ultrasonically dispersing the powder for 1 minute using an ultrasonic homogenizer (US-150T; manufactured by Nippon Seiki Seisakusho), and then measuring the volume average particle size (D50) using a laser diffraction / scattering particle size distribution analyzer (MT3300EXII; manufactured by Microtrack Bell Corporation).

[0019] The amount of wax powder (component A) in the cosmetic of the present invention is preferably 1% by mass or more, more preferably 2.5% by mass or more, and even more preferably 4% by mass or more, based on the total amount of the cosmetic. If the amount is less than 1% by mass, sufficient impact resistance may not be obtained. The amount of wax powder (component A) can be, for example, 1 to 20% by mass, 2 to 15% by mass, or 3 to 10% by mass.

[0020] (B) Powder component The powder component (B) (also referred to as "component B") blended in the cosmetic of the present invention is a powder component that constitutes a solid cosmetic in powder form, but does not include a component that corresponds to the wax powder (A). The powder component (B) in the present invention contains (b1) nonporous silica (also referred to as "component b1") as an essential component.

[0021] The nonporous silica (b1) of the present invention is a powder made of silica (silicic anhydride) and is a nonporous powder. In this specification, "nonporous" refers not only to solid powders (particles) that have no "pores" at all, but also to silica powders that have fewer "pores" than the general "porous silica" used in cosmetics, and is distinguished from "porous silica" in its "specific surface area" and / or "oil absorption capacity." That is, the "nonporous silica" that is the component (b1) of the present invention has (Condition 1) a specific surface area of ​​50 m 2 / g or less, and (condition 2) the oil absorption is 50 mL / 100 g or less.

[0022] The non-porous silica (component b1) used in the present invention may be a silica powder that satisfies either one or both of the above-mentioned (Condition 1) and (Condition 2). 2 Silica powder of 20m / g or less is preferred, and more preferred is silica powder of 20m / g or less. 2 / g or less, more preferably 10m 2 / g or less, e.g., 10m 2 / g or less than 8m 2 The silica powder can have a specific surface area of ​​1 / g or less. The specific surface area can be calculated by measuring the amount of nitrogen adsorbed to silica at 77K and analyzing it by the BET method.

[0023] The nonporous silica (component b1) used in the present invention preferably has an oil absorption of 50 mL / 100 g or less, more preferably 30 mL / 100 g or less, for example, 25 mL / 100 g or less or 20 mL / 100 g or less.

[0024] The "oil absorption" in this specification is a value measured in accordance with JIS K5101-13-2:2004 (boiled linseed oil method). Specifically, it can be roughly determined by the following method. A 1.5g sample of silica powder is placed on a piece of wrapping paper and transferred to a glass measuring plate. Next, squalane is added to the sample from a burette, 4 or 5 drops at a time, and each time the whole is thoroughly kneaded with a palette knife. This dropping and kneading process is repeated until the whole becomes a hard, putty-like mass, and each drop is kneaded together until the last drop can be rolled into a spiral shape with a palette knife. This is the end point, and the oil absorption per 100g of sample is calculated using the following formula. Oil absorption amount (mL / 100g)=(A / W)×100 (A represents the amount of squalane dropped (mL), and W represents the amount of sample collected (g))

[0025] As the nonporous silica (component b1) in the present invention, it is particularly preferable to use spherical nonporous silica powder. The use of spherical nonporous silica further improves the usability of cosmetics. "Spherical powder" refers to powder with a spherical or nearly spherical outer shape, with a ratio of the major axis to the minor axis of 1.2 or less. The average particle size of the non-porous silica (component b1) in the present invention is preferably about 1 to 20 μm, more preferably 2 to 15 μm.

[0026] Commercially available products may be used as the nonporous silica (component b1). An example of a commercially available product that satisfies both the above (Condition 1) and (Condition 2) is CHIFFONSIL P-3R (average particle size: approximately 7 μm; oil absorption capacity: 20 mL / 100 g; specific surface area: 1.1 to 5.2 m). 2 / g), CHIFFONSIL-5 (average particle size: approx. 5μm; oil absorption = less than 20mL / 100g; specific surface area = 2m 2 / g) (all manufactured by JGC Catalysts and Chemicals Co., Ltd.).

[0027] The blending amount of nonporous silica (component b1) in the cosmetic of the present invention is preferably 2 to 15 mass% of the total amount of the cosmetic, more preferably 2.5 to 12 mass%, and even more preferably 3 to 10 mass%. If the blending amount of nonporous silica (component b1) is less than 2 mass%, the usability of the molded cosmetic may be poor.

[0028] The powder components (component B) blended into the cosmetic of the present invention, other than nonporous silica (component b1) (also referred to as "other powders" or "component b2"), are not particularly limited as long as they are those commonly used in powder cosmetics. Examples of other powders (component b2) include extender pigments, coloring materials (including inorganic pigments (white pigments, colored pigments) and organic pigments), pearlescent agents, UV scattering agents, other inorganic powders and organic powders, etc.

[0029] Specific examples of other powders (component b2) include, but are not limited to, the following. Examples of extender pigments include talc, kaolin, sericite, muscovite, phlogopite, synthetic mica, synthetic fluorphlogopite, lepidolite, biotite, calcined talc, calcined sericite, calcined muscovite, calcined phlogopite, 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 soaps (e.g., zinc myristate, calcium palmitate, aluminum stearate, etc.), photochromic titanium oxide (titanium dioxide sintered with iron oxide), and reduced zinc oxide.

[0030] Examples of coloring materials include inorganic white pigments (e.g., titanium dioxide, zinc oxide, etc.); inorganic red pigments (e.g., red iron oxide (red iron oxide (red ochre), iron titanate, etc.); inorganic brown pigments (e.g., γ-iron oxide, etc.); inorganic yellow pigments (e.g., yellow iron oxide, ochre, etc.); inorganic black pigments (e.g., black iron oxide, low-order titanium oxide, etc.); inorganic purple pigments (e.g., mango violet, cobalt violet, etc.); inorganic green pigments (e.g., chromium oxide, chromium hydroxide, cobalt titanate, etc.); inorganic blue pigments (e.g., ultramarine, Prussian blue, etc.); natural pigments ( Examples include chlorophyll, β-carotene, etc.); organic pigments (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, 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 202, Yellow No. 203, Green No. 3, and Blue No. 1, etc.).

[0031] Examples of pearlescent agents include bismuth oxychloride, fish scale foil, titanium mica, iron oxide-coated titanium mica, low-order titanium oxide-coated titanium mica; and metal powder pigments (such as aluminum powder and copper powder). Examples of ultraviolet scattering agents include fine particle titanium oxide and fine particle zinc oxide.

[0032] Other inorganic powders include, for example, silica (silicic anhydride) other than non-porous silica (component b1) and organically modified clay mineral powders. However, in order to maintain good impact resistance and usability, the cosmetic composition of the present invention is made of porous material (specific surface area of ​​50 m or less). 2 It is preferable that the cosmetic does not contain silica powder with an oil absorption of more than 50 mL / 100 g or an oil absorption of more than 50 mL / 100 g, or that the amount blended is less than 2% by mass. Furthermore, when flaky silica powder is blended, it is preferable that the amount blended is 2% by mass or less of the total amount of the cosmetic. Examples of organic powders include polyamide resin powder (nylon powder), polyethylene powder, polystyrene powder, styrene-acrylic acid copolymer resin powder, benzoguanamine resin powder, and polytetrafluoroethylene powder.

[0033] The other powder (component b2) preferably contains an extender pigment, a coloring material, and a pearling agent. Although not particularly limited, the amount of the extender pigment is usually 10 to 50% by mass, preferably 15 to 40% by mass, based on the total amount of the cosmetic. The amount of the coloring material is usually 1 to 15% by mass, preferably 3 to 10% by mass, based on the total amount of the cosmetic. The amount of the pearling agent is usually 5 to 40% by mass, preferably 10 to 30% by mass, based on the total amount of the cosmetic.

[0034] The cosmetic of the present invention has good impact resistance and a pleasant feel when used due to the inclusion of (A) wax powder and (b1) nonporous silica. Therefore, it is not necessary to incorporate silicone elastomer powder, which has been incorporated into conventional solid powder cosmetics to improve impact resistance. Furthermore, the inclusion of silicone elastomer powder tends to reduce color development. Therefore, when the cosmetic of the present invention contains silicone elastomer powder, the amount of silicone elastomer powder incorporated is less than 2% by mass or less than 1% by mass of the total cosmetic, as well as embodiments in which silicone elastomer powder is not incorporated.

[0035] (C) Oil content The oil component (also referred to as "ingredient C") incorporated into the cosmetic of the present invention contains (c1) a non-volatile dimethicone having a viscosity of 10 cs or less. "Non-volatile dimethicone with a viscosity of 10 cs or less" (also referred to as "ingredient c1") is a dimethicone (polydimethylsiloxane) that is liquid at room temperature (25°C) and is a non-volatile silicone oil with a viscosity (kinematic viscosity) of 10 cs (centistokes) or less. In this specification, "non-volatile" means that the volatile content is 5% or less when left at atmospheric pressure and 105°C for 3 hours. Here, "volatile content" refers to the weight change rate (rate of loss due to volatilization) measured by a gravimetric method after placing filter paper on a glass petri dish and dropping about 0.2 g of sample. In contrast, a volatile content of more than 5% measured under similar conditions is considered "volatile."

[0036] The non-volatile dimethicone (component c1) used in the present invention is a dimethicone, preferably a linear dimethicone, having a viscosity of 10 cs or less, preferably 8 cs or less, more preferably about 6 cs. The lower limit of the viscosity is not particularly limited as long as it is "non-volatile," but it is usually 6 cs or more.

[0037] The amount of non-volatile dimethicone (ingredient c1) in the cosmetic of the present invention is 15 to 50% by mass, preferably 20 to 45% by mass, and more preferably 30 to 40% by mass, based on the total amount of the cosmetic. If the amount of non-volatile dimethicone is less than 15% by mass or more than 50% by mass, impact resistance or usability will decrease.

[0038] The oil (component C) in the present invention, which is a non-volatile oil other than non-volatile dimethicone (component c1), is not particularly limited as long as it is one that can be used in general cosmetics, but it is preferable to blend (c2) a non-silicone oil that is liquid at room temperature (25°C) (referred to as a "non-silicone liquid oil" or "component c2").

[0039] Examples of non-silicone liquid oils (component c2) include cetyl octanoate, cetyl ethylhexanoate, isodecyl pivalate (isodecyl neopentanoate), hexyldecyl dimethyloctanoate, ethyl laurate, hexyl laurate, isopropyl myristate, 2-hexyldecyl myristate, myristyl myristate, octyldodecyl myristate, isopropyl palmitate, 2-ethylhexyl palmitate, 2-hexyldecyl palmitate, 2-heptylundecyl palmitate, stearyl Butyl phosphate, Isocetyl stearate, Isocetyl isostearate, Decyl oleate, Dodecyl oleate, Oleyl oleate, Myristyl lactate, Cetyl lactate, Diisostearyl malate, Cholesteryl 12-hydroxystearate, Castor oil fatty acid methyl ester, 2-Ethylhexyl succinate, Diisobutyl adipate, 2-Hexyldecyl adipate, Di-2-heptylundecyl adipate, Diisopropyl sebacate, Di-2-ethylhexyl sebacate, Ethylene di-2-ethylhexanoate Glycol, Neopentyl Glycol Dicaprate, Neopentyl Glycol Dioctanoate, Acetoglyceride, Glycerin Di-2-heptylundecanoate, Glycerin Trioctanoate, Glycerin Tri-2-ethylhexanoate, Glycerin Trimyristate, Glycerin Triisopalmitate, Glycerin Tri-2-heptylundecanoate, Trimethylolpropane Tri-2-ethylhexanoate, Trimethylolpropane Triisostearate, Pentaerythritol Tetraoctanoate, Tetra-2-ethyl Examples of suitable oils include, but are not limited to, ester oils such as pentaerythritol hexanoate; hydrocarbon oils such as liquid paraffin, squalane, and polybutene; and liquid oils such as avocado oil, evening primrose oil, camellia oil, macadamia nut oil, sunflower oil, almond oil, corn oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, camellia oil, castor oil, linseed oil, safflower oil, cottonseed oil, perilla oil, soybean oil, peanut oil, tea seed oil, Japanese kaya oil, rice bran oil, Chinese tung oil, Japanese tung oil, jojoba oil, and germ oil.

[0040] The blend amount of the non-silicone liquid oil (ingredient c2) in the cosmetic of the present invention is usually 1 to 20 mass %, preferably 1 to 15 mass %, and more preferably 1 to 10 mass %, based on the total amount of the cosmetic.

[0041] The cosmetic of the present invention may contain a non-volatile silicone oil other than non-volatile dimethicone (component c1) (referred to as "other non-volatile silicone oil" or "component c3"). Examples of other non-volatile silicone oils (component c3) include linear polysiloxanes such as dimethylpolysiloxane (dimethicone; provided that the viscosity exceeds 10 cs), methylphenylpolysiloxane, and diphenylpolysiloxane, as well as various modified polysiloxanes such as amino-modified polysiloxanes, polyether-modified polysiloxanes, alkyl-modified polysiloxanes, and fluorine-modified polysiloxanes. When the cosmetic of the present invention contains other non-volatile silicone oils (component c3), the amount of the other non-volatile silicone oil (component c3) is preferably less than that of the non-volatile dimethicone (component c1). The amount of the other non-volatile silicone oil (component c3) relative to the total amount of the cosmetic is preferably 5% by mass or less, more preferably 3% by mass or less, and even more preferably 1% by mass or less. The cosmetic preparation of the present invention includes an embodiment that does not contain other non-volatile silicone oils (component c3).

[0042] In addition to the non-volatile oils described above, the cosmetic of the present invention may contain a volatile oil (component c4). Examples of volatile oils (component c4) include hydrocarbon oils with low boiling points (e.g., boiling points of 200°C or less), such as isododecane, isohexadecane, and light liquid isoparaffin, and low boiling point chain or cyclic silicone oils, such as octamethylcyclotetrasiloxane and decamethylcyclopentasiloxane. However, formulations containing a volatile oil (component c4) pose limitations, such as the need to use an airtight container for the molded cosmetic. Therefore, the amount of volatile oil (component c4) in the molded cosmetic is preferably less than 5% by mass, more preferably 3% by mass or less, and even more preferably 1% by mass or less, of the total amount of the cosmetic. The cosmetic of the present invention also includes embodiments that do not contain a volatile oil (component c4).

[0043] The oil component (component C) of the cosmetic of the present invention may contain a substance that thickens liquid oil (an "oil thickener" or "oil gelling agent"), such as a dextrin fatty acid ester. However, when the cosmetic of the present invention is produced using a wet molding method (using non-volatile dimethicone as the solvent), the incorporation of a dextrin fatty acid ester may reduce solvent removal, making molding difficult during mass production, and the molded cosmetic tends to become soft. Therefore, the amount of dextrin fatty acid ester in the cosmetic of the present invention is preferably less than 1% by mass, and more preferably less than 0.5% by mass. The cosmetic of the present invention also includes embodiments that do not contain a dextrin fatty acid ester.

[0044] In addition to the essential components (A) wax powder, (B) powder component, and (C) oil component described above, the cosmetic of the present invention may contain other optional components that can be incorporated into solid cosmetic powder compositions, to the extent that the effects of the present invention are not impaired. Examples of other optional ingredients include, but are not limited to, surfactants, ultraviolet absorbers, moisturizers, antioxidants, preservatives, various drugs, and fragrances.

[0045] The cosmetic of the present invention contains a powdery wax, and the wax powder (component A) maintains its powdery form even after molding, thereby working in conjunction with the co-formulated nonporous silica (component b1) and oil (component C) to exhibit excellent impact resistance and a pleasant feel when used. Therefore, it is preferable that the manufacturing process of the cosmetic of the present invention does not include a step of heating the wax powder (component A) to a temperature above the melting point. In other words, the cosmetic of the present invention is suitable for manufacturing by wet molding, which does not include a heating step.

[0046] Therefore, the present invention provides: (1) mixing (A) a wax powder, (B) (b1) a powder component including nonporous silica, and (C) a raw material composition including an oil component with (c1) a nonvolatile dimethicone having a viscosity of 10 cs or less to form a slurry; and (2) filling the slurry into a container and compression-molding the slurry while removing a portion of the (c1) non-volatile dimethicone; The present invention provides a method for producing a powdery solid cosmetic product, comprising:

[0047] In the manufacturing method of the present invention, (A) wax powder, (B) powder component (including (b1) nonporous silica), (C) oil component, and (c1) nonvolatile dimethicone having a viscosity of 10 cs or less are as described above.

[0048] In the manufacturing method of the present invention, first, raw materials including (A) wax powder, (B) powder component, and (C) oil are mixed to prepare a raw material composition (raw material preparation step). The (B) powder component contains (b1) nonporous silica. The (C) oil component preferably contains (c2) non-silicone liquid oil and further contains (c1) nonvolatile dimethicone having a viscosity of 10 cs or less. The blending amount of each component is within the range described above for cosmetics. The raw material preparation step can be carried out using, for example, a device such as a Henschel mixer (registered trademark) or a pulverizer.

[0049] Next, a solvent is added to the prepared raw material composition and mixed to form a slurry (slurry formation step). Specifically, the solvent and the raw material composition are introduced into an apparatus such as a disper mixer, a homogenizer, a planetary mixer, a Combimix (registered trademark), an Ajihomo mixer, or a twin-screw kneader, and then mixed / dispersed.

[0050] As the solvent used in the slurry formation step, (c1) non-volatile dimethicone having a viscosity of 10 cs or less is used. The solvent may contain a volatile solvent such as water, a lower alcohol, a volatile silicone oil, or a volatile hydrocarbon oil. However, since the remaining volatile solvent may affect the properties of the cosmetic after molding, a heat drying process may be required to completely remove the volatile solvent. Therefore, in the manufacturing method of the present invention, it is preferable that the solvent used in the slurry formation process consists solely of (c1) a non-volatile dimethicone having a viscosity of 10 cs or less.

[0051] The blending ratio (mass ratio) of the solvent to the raw material composition in the slurry formation step, solvent (mass) / raw material composition (mass), is preferably within a range of 1 / 2 to 3 / 2, and more preferably 7 / 10 to 11 / 10.

[0052] In the production method of the present invention, the slurry obtained in the slurry formation step is filled into a container and compression molded while removing the solvent (compression molding step). The method for carrying out the compression molding step is not particularly limited, and any known method can be used. For example, the cosmetic of the present invention is obtained by filling the slurry into a container such as a metal or resin tray by injection filling or the like, and then compression molding while removing the solvent from the filled slurry by suction or absorption.

[0053] In the compression molding process, it is preferable to adjust the conditions for solvent removal and compression so that at least a portion of the solvent (c1) non-volatile dimethicone remains in the molded cosmetic. By using the manufacturing method of the present invention, the heat drying step for removing the solvent is unnecessary, simplifying the process. Therefore, the manufacturing method of the present invention is suitable for mass-producing the cosmetic of the present invention.

[0054] The cosmetic according to the present invention is a powdery solid cosmetic that has excellent impact resistance and color development, is highly elastic, and has a moist feel when used, and can be provided in the form of makeup cosmetics such as foundation, eye shadow, blush, body powder, perfume powder, baby powder, pressed powder, deodorant powder, face powder (face powder), highlighter, bronzer, etc. [Example]

[0055] The present invention will be described in more detail below with reference to specific examples, but the present invention is not limited to the following examples. Furthermore, unless otherwise specified, the blending amounts in the following examples are expressed as % by mass relative to the total amount of the cosmetic.

[0056] The powder solid cosmetics (eye shadows) having the formulations of Examples 1 to 4 and Comparative Examples 1 to 3 shown in Tables 1 and 2 below were prepared by wet molding using non-volatile dimethicone (Silicone KF-96A-6T (Shin-Etsu Chemical Co., Ltd.)) as a solvent. Comparative Example 4 was prepared by a dry method including a step of heating to a temperature above the melting point of the wax (95 to 100°C).

[0057] The cosmetic compositions of each example were evaluated for impact resistance and color development. The evaluation methods and criteria were as follows. The evaluation results for the cosmetic compositions of each example are shown in Tables 1 and 2.

[0058] (1) Impact resistance After vibration was applied to each cosmetic material, the appearance of the cosmetic material was visually observed and evaluated according to the following criteria. <Evaluation criteria> A+: No change in the appearance of the cosmetic product A: Almost no change in the appearance of the cosmetic B: There is a slight change in the appearance of the cosmetic product, but it does not cause any problems in practical use. C: Part of the cosmetic was liquefied D: The entire cosmetic was liquefied and its appearance changed significantly.

[0059] (2) Color development Each cosmetic sample was applied to the inner arm of a subject, and the color development was evaluated by visual observation after use according to the following criteria. <Evaluation criteria> A: Excellent color development B: Normal (same as conventional eyeshadow) C: Poor color development

[0060] [Table 1]

[0061] [Table 2]

[0062] As shown in Tables 1 and 2, the cosmetics of Examples 1 to 4, which contained wax powder (component A) and nonporous silica (component b1), had sufficient impact resistance and excellent color development. On the other hand, Comparative Examples 1 and 2, which contained neither wax powder (component A) nor nonporous silica (component b1), had extremely low impact resistance. When the nonporous silica (component b1) in Example 1 was replaced with porous silica (oil absorption = 150 mL / 100 g; specific surface area = 300 m 2 In Comparative Example 3, in which wax was replaced with methylcellulose (Mg / g), sufficient impact resistance was not obtained. In Comparative Example 4, in which wax that had been heated and melted in the manufacturing process was blended, the impact resistance was sufficient, but the entire cosmetic became cloudy and the color development was poor.

Claims

1. (A) wax powder; (B) powder components (but excluding (A) wax powder); and (C) containing oil, The (B) powder component contains (b1) nonporous silica, A solid cosmetic in powder form, characterized in that the (C) oil component contains (c1) non-volatile dimethicone having a viscosity of 10 cs or less in an amount of 15 to 50% by mass relative to the total amount of the cosmetic.

2. 2. The cosmetic according to claim 1, wherein the blending amount of the wax powder (A) is 1% by mass or more based on the total amount of the cosmetic.

3. The (b1) non-porous silica has a specific surface area of ​​50 m ２ 2. The cosmetic preparation according to claim 1, wherein the spherical silica powder satisfies either or both of the following conditions: (1) the surface area of ​​the spherical silica powder is 100 μm / g or less; and (2) the oil absorption is 50 mL / 100 g or less.

4. 2. The cosmetic according to claim 1, wherein the blending amount of the nonporous silica (b1) is 2 to 15% by mass based on the total amount of the cosmetic.

5. (1) mixing (A) a wax powder, (B) (b1) a powder component containing nonporous silica, and (C) a raw material composition containing an oil component with (c1) a nonvolatile dimethicone having a viscosity of 10 cs or less to form a slurry; and (2) filling the slurry into a container and compression-molding the slurry while removing a portion of the (c1) non-volatile dimethicone; 2. The method for producing the solid cosmetic preparation in powder form according to claim 1, comprising:

6. The method according to claim 5, which does not include the step (A) of heating to a temperature at which the wax powder melts or higher.