Solid powder cosmetic

Abstract

To provide a solid powder cosmetic that exhibits superior removability when water is used, reduces the occurrence of unevenness during application, and achieves a uniform, natural finish with no powdery appearance.SOLUTION: A solid powder cosmetic includes following components (A), (B), (C) and (D): (A) 20-95 mass% of plate-like powder treated with alkoxysilane, (B) a nonionic surfactant with an HLB of less than 8, (C) a nonionic surfactant with an HLB of 8 or more, and (D) an oil component that is liquid at 25°C.SELECTED DRAWING: None

Description

[Technical field]

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

[0002] 2. Description of the Related Art Conventionally, solid powder cosmetics that are used with a sponge soaked in water have been known as solid powder cosmetics that provide a refreshing feeling during use and excellent cosmetic durability. For example, Patent Document 1 describes a solid powder cosmetic preparation for use with water that contains a non-silicone anionic surfactant, a non-silicone nonionic surfactant, a silicone surfactant, and a powder, which has good miscibility between water and the powder, a refreshing feeling, good spreadability on the skin, and excellent cosmetic durability. Patent Document 2 describes a water-soluble eye makeup cosmetic that is characterized by blending a nonionic surfactant with an HLB of 10 to 15, silicic anhydride and / or crystalline cellulose with a particle size of 1 to 100 μm, a hydrophobized powder, and a non-volatile oily component, and that has excellent water solubility, good color development, is smooth and easy to apply, has a uniform finish, and has good makeup durability. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2001-220319 A [Patent Document 2] JP 2012-211102 A Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional water-based solid powder cosmetics tend to be uneven when applied, and there were problems with the finish. Specifically, there were problems such as uneven streaks when applied, noticeable boundaries between applied and unapplied areas after drying, and noticeable powderiness and whiteness. [Means for solving the problem]

[0005] The present inventors have discovered that a solid powder cosmetic product that combines a plate-like powder treated with alkoxysilane, two types of nonionic surfactants with specific HLB values, and a liquid oil component is easy to remove with water, is less likely to become uneven when applied, and provides a uniform, non-powdery, and natural finish.

[0006] The present invention comprises the following components (A), (B), (C) and (D): (A) 20 to 95 mass% of a plate-like powder treated with an alkoxysilane, (B) a nonionic surfactant having an HLB value of less than 8; (C) Nonionic surfactants with HLB of 8 or more; (D) Oil components that are liquid at 25°C The present invention relates to a solid powder cosmetic preparation comprising the above-mentioned. Effect of the Invention

[0007] The solid powder cosmetic of the present invention is easy to remove with water, does not easily become uneven when applied, gives a uniform, non-powdery, transparent and natural finish, and is not easily disintegrated by sweat. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Component (A) is a platelet-like powder treated with an alkoxysilane. The plate-like powder is not limited as long as it is used in ordinary cosmetics, and examples thereof include boron nitride, silicic acid, silicic anhydride, magnesium silicate, sericite, talc, mica, kaolin, clay, bentonite, synthetic phlogopite, bismuth oxychloride, zirconium oxide, magnesium oxide, aluminum oxide, calcium sulfate, barium sulfate, magnesium sulfate, calcium carbonate, magnesium carbonate, etc. Also, composite pigments based on these plate-like powders can be used. Examples of composite pigments based on these plate-like powders include titanium oxide-coated sericite, titanium oxide-coated mica, titanium oxide-coated bismuth oxychloride, titanium oxide-coated talc, titanium oxide-iron oxide-coated mica, titanium oxide-coated synthetic phlogopite, titanium oxide-barium sulfate-coated mica, titanium oxide-silica-coated mica, zinc oxide-coated talc, titanium oxide-tin oxide-coated mica, zinc oxide-titanium oxide-coated mica, titanium oxide-alumina-coated mica, titanium oxide-iron oxide-silica-coated mica, titanium oxide-silica-alumina-coated mica, etc. Among these, from the viewpoints of preventing unevenness when applied, achieving a uniform, non-powdery, transparent, natural finish, and further suppressing smudging due to sweat, it is preferable to contain at least one or more types selected from sericite, talc, mica, synthetic mica, and boron nitride, more preferably to contain at least one or more types selected from talc and synthetic mica, and even more preferably to contain at least talc.

[0009] In component (A), examples of alkoxysilanes used to treat the plate-like powder include hexyltrimethoxysilane, hexyltriethoxysilane, caprylyltrimethoxysilane, caprylyltriethoxysilane, decyltrimethoxysilane, decyltriethoxysilane, and the like. Caprylylsilane is preferred, and caprylyltriethoxysilane is more preferred, from the viewpoints of being less prone to unevenness when applied, providing a uniform, non-powdery, transparent, and natural finish, and further preventing breakdown due to sweat.

[0010] The plate-like powder can be surface-treated with an alkoxysilane by a conventional method such as dry treatment or wet treatment.

[0011] From the viewpoint of obtaining a transparent and natural finish, the average particle size of the platy powder of component (A) is preferably from 1 to 20 μm, more preferably from 5 to 15 μm, and even more preferably from 7 to 12 μm. Here, the average particle size is measured by a laser diffraction scattering particle size distribution analyzer (LA-920, manufactured by Horiba, Ltd.) In the present invention, the volume average particle size is the average particle size based on volume, and is defined as the 50% median size.

[0012] The plate-like powder of component (A) has an apparent specific gravity of 0.1 to 0.4 g / cm3 from the viewpoint of providing excellent slipperiness and a natural finish with transparency. 3 It is preferable that the density is 0.18 to 0.37 g / cm 3 More preferably, 0.25 to 0.34 g / cm 3 is more preferred. Here, the apparent specific gravity is a measurement value derived by filling a sample into a cup of a specified capacity by allowing the powder to fall naturally and weighing it, and indicates the packing density of the powder in a state where it is allowed to fall naturally. These apparent specific gravities can be measured according to the standard JIS K-5101.

[0013] Component (A) can be used alone or in combination of two or more types. From the viewpoints of preventing unevenness upon application, providing a transparent and natural finish, and further suppressing smudging due to sweat, the content is 20 to 95 mass % of the total composition, preferably 40 to 92 mass %, and more preferably 50 to 90 mass %.

[0014] Component (B) is a nonionic surfactant having an HLB of less than 8, preferably an HLB of 2-7.5, and more preferably an HLB of 3-7.

[0015] In the present invention, HLB (Hydrophilic-Lipophilic Balance) indicates the molecular weight of the hydrophilic group portion in the total molecular weight of a surfactant, and for nonionic surfactants, it is calculated by Griffin's formula.

[0016] The nonionic surfactant of component (B) is not limited as long as it is one that is used in ordinary cosmetics, and examples thereof include sorbitan fatty acid esters, glycerin fatty acid esters, polyglycerin fatty acid esters, propylene glycol fatty acid esters, polyethylene glycol fatty acid esters, sucrose fatty acid esters, polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene alkyl ethers, polyoxyethylene sorbitol fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyoxyethylene propylene glycol fatty acid esters, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene hydrogenated castor oil fatty acid esters, polyoxyethylene phytostanol ether, polyoxyethylene phytosterose ether, polyoxyethylene cholestanol ether, polyoxyethylene cholesteryl ether, alkyl glyceryl ether modified silicones, polyether modified silicones, polyoxyalkylene / alkyl co-modified silicones, polyoxyalkylene / fluoroalkyl co-modified silicones, and the like.

[0017] Of these, from the viewpoints of preventing uneven application and preventing breakdown due to sweat when used with water, it is preferable to include sorbitan fatty acid esters, glycerin fatty acid esters, polyglycerin fatty acid esters, polyether-modified silicones, and polyoxyalkylene / alkyl-co-modified silicones, and it is more preferable to include sorbitan fatty acid esters.

[0018] Component (B) can be used alone or in combination of two or more kinds. From the viewpoints of preventing unevenness when applied when used with water and suppressing smudging due to sweat, the content is preferably 0.01 to 5 mass %, more preferably 0.2 to 4 mass %, and even more preferably 0.4 to 1.5 mass % of the total composition.

[0019] Component (C) is the same as the nonionic surfactant described above, and is a nonionic surfactant having an HLB of 8 or more, preferably an HLB of 9 to 16, and more preferably an HLB of 9.5 to 15.5.

[0020] The nonionic surfactant of component (C) is the same as the nonionic surfactant described above, and examples thereof include those having an HLB value of 8 or more. From the viewpoint of excellent removal when used in water, it is preferable for the surfactant to contain one or more selected from 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, and polyoxyethylene hydrogenated castor oil fatty acid esters, and it is more preferable for the surfactant to contain polyoxyethylene sorbitan fatty acid esters.

[0021] Component (C) can be used alone or in combination of two or more kinds. From the viewpoint of excellent removal when used with water, the content is preferably 0.1 to 5 mass % of the total composition, more preferably 0.2 to 4 mass %, and even more preferably 0.4 to 2 mass %.

[0022] In the present invention, from the viewpoints of excellent removal when water is used, less unevenness when applied, and further suppression of smearing due to sweat, the total content of components (B) and (C), (B)+(C), is preferably 0.11 to 10 mass%, more preferably 0.4 to 8 mass%, and further preferably 0.8 to 3.5 mass%, of the total composition.

[0023] In the present invention, the mass ratio (B) / (C) of component (B) to component (C) is preferably 1.8 or less, more preferably 1.5 or less, and even more preferably 1 or less, from the viewpoints of excellent removal when water is used, less unevenness when applied, and further suppression of smudging due to sweat.

[0024] In the present invention, the mass ratio (A) / [(B)+(C)] of component (A) to the total content of components (B) and (C) is preferably 25 or more, more preferably 25 to 300, even more preferably 35 to 200, and even more preferably 40 to 100, from the viewpoints of excellent removal when using water, less unevenness when applied, uniform, non-powdery, transparent and natural finish, and further, suppression of breakdown due to sweat and excellent washability with soap and the like.

[0025] Component (D) is an oil component that is liquid at 25° C. Liquid means that it has fluidity, and includes a paste state. The oil component of component (D) may be any oil that is commonly used in cosmetics, such as hydrocarbon oils, ester oils, ether oils, silicone oils, and higher alcohols.

[0026] More specifically, examples of the hydrocarbon oil include straight-chain or branched-chain hydrocarbon oils such as squalane, vegetable squalane, liquid paraffin, liquid isoparaffin, polybutene, hydrogenated polyisobutene, hydrogenated polydecene, and petrolatum.

[0027] Ester oils include monoester oils, diester oils, triester oils and tetraester oils. Examples of monoester oils include monoesters of aliphatic or aromatic monocarboxylic or dicarboxylic acids having 2 to 24 carbon atoms. Specific examples include cetyl 2-ethylhexanoate, cetyl octanoate, isononyl isononanoate, isotridecyl isononanoate, hexyl laurate, isopropyl myristate, octyldodecyl myristate, myristyl myristate, 2-hexyldecyl myristate, isopropyl palmitate, octyl palmitate, palmitate, and ethylhexyl hexanoate. Examples of the lactose-soluble oleate include 2-hexyldecyl butyl stearate, isocetyl stearate, isocetyl isostearate, decyl oleate, isodecyl benzoate, octyl methoxycinnamate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, octyldodecyl lactate, lanolin acetate, 2-ethylhexyl succinate, 2-hexyldecyl adipate, alkyl benzoate (C12 to C15), and octyldodecyl 12-stearoyl stearate.

[0028] Examples of diester oils include diesters of dicarboxylic acids having 3 to 18 carbon atoms and difatty acid esters of polyhydric alcohols. Specific examples include propylene glycol dicaprylate, neopentyl glycol dicaprate, glycol distearate, propylene glycol diisostearate, glyceryl diisostearate, glyceryl monomyristate monoisostearate, glycerin di-2-heptylundecanoate, di-2-ethylhexyl succinate, diisopropyl sebacate, diisostearyl malate, ethylene glycol di-2-ethylhexanoate, diisobutyl adipate, di-2-heptylundecyl adipate, and di-2-ethylhexyl sebacate.

[0029] Triester oils include tri-fatty acid esters of trivalent or higher polyhydric alcohols, and specific examples include glyceryl trimyristate, glyceryl triisopalmitate, glyceryl tri-2-heptylundecanoate, trimethylolpropane triethylhexanoate, trimethylolpropane trioctanoate, tri(caprylic / capric)glyceryl, trioleate, glyceryl tri-2-ethylhexanoate, glyceryl triisostearate, olive oil, and jojoba oil.

[0030] Examples of tetraester oils include tetra fatty acid esters of polyhydric alcohols having 4 or more valences, and specific examples thereof include pentaerythritol tetra(behenic acid / benzoic acid / ethylhexanoic acid), pentaerythritol tetraethylhexanoate, pentaerythritol tetraoctanoate, and pentaerythritol tetra-2-ethylhexanoate.

[0031] The ether oils include dialkyl ethers, specifically, dihexyl ether, dicaprylyl ether, cetyl-1,3-dimethylbutyl ether, and the like.

[0032] Examples of silicone oils include crosslinked methylpolysiloxane, network methylpolysiloxane, dimethylpolysiloxane, methyltrimethicone, dimethylcyclopolysiloxane, methylphenylpolysiloxanes such as diphenylsiloxyphenyltrimethicone, and higher alcohol-modified organopolysiloxanes. Examples of volatile silicone oils include linear dimethylpolysiloxanes such as dimethylpolysiloxane (1cs), dimethylpolysiloxane (1.5cs), and dimethylpolysiloxane (2cs); branched siloxanes such as methyltrimethicone, tris(trimethylsilyl)methylsilane, and tetrakis(trimethylsilyl)silane; and cyclic dimethylsiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane.

[0033] Examples of higher alcohols include those having a straight or branched alkyl or alkenyl group having 10 to 24 carbon atoms, such as lauryl alcohol, myristyl alcohol, isocetyl alcohol, isostearyl alcohol, 2-octyldodecanol, and oleyl alcohol.

[0034] From the viewpoint of achieving excellent shape retention and a good feel in use and finish, component (D) is preferably a hydrocarbon oil or an ester oil, and more preferably contains one or more oils selected from hydrocarbon oils and monoester oils.

[0035] Component (D) can be used alone or in combination of two or more kinds. From the viewpoint of obtaining excellent shape retention and good usability and finish, the content is preferably 4 to 25 mass % of the total composition, more preferably 6 to 20 mass %, and even more preferably 8 to 15 mass %.

[0036] The solid powder cosmetic preparation of the present invention may further contain (E) a color pigment treated with an alkoxysilane. Examples of color pigments include those used in ordinary cosmetics, such as metal oxides such as titanium oxide, zinc oxide, cerium oxide, aluminum oxide, yellow iron oxide, black iron oxide, red ocher, Prussian blue, ultramarine, chromium oxide, and chromium hydroxide, metal complexes such as manganese violet and cobalt titanate, and inorganic pigments such as carbon black; synthetic organic pigments, organic dyes and lake pigments thereof, such as Red No. 3, Red No. 104, Red No. 106, Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 227, Red No. 228, Red No. 230, Red No. 401, Red No. 405, Red No. 505, Orange No. 203, Orange No. 204, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 401, Blue No. 1, and Blue 404; and natural organic dyes, such as β-carotene, caramel, and paprika dye. The color pigment preferably contains at least one or more selected from titanium oxide, zinc oxide, yellow iron oxide, black iron oxide, and red iron oxide.

[0037] In component (E), the alkoxysilane used to treat the color pigment is the same as in component (A), with caprylylsilane being preferred, and caprylyltriethoxysilane being more preferred.

[0038] The color pigment of component (E) can be used alone or in combination of two or more kinds. From the viewpoints of maintaining the makeup effect while preventing unevenness upon application and suppressing smearing due to sweat, the content is preferably 0.01 to 30 mass %, more preferably 0.1 to 25 mass %, and even more preferably 1 to 20 mass % of the total composition.

[0039] The solid powder cosmetic of the present invention may contain, in addition to the above-mentioned components, components used in ordinary cosmetics, such as powders other than components (A) and (E), oil components other than component (D), surfactants other than components (B) and (C), preservatives, antioxidants, colorants, pH adjusters, fragrances, ultraviolet absorbers, moisturizers, blood circulation promoters, cooling agents, antiperspirants, germicides, skin activators, etc.

[0040] From the viewpoints of being environmentally friendly and providing excellent usability, the solid powder cosmetic of the present invention preferably contains no more than 1% by mass of organic resin powder such as microplastics in the total composition, more preferably no more than 0.1% by mass, and even more preferably is substantially free of such powder. Specifically, it refers to organic resin powder other than cellulose powder that has excellent biodegradability. Examples of the organic resin powder include crosslinked or non-crosslinked organic resin powders such as powders of one or more polymers or copolymers selected from polyamide resin, nylon resin, polyester resin, polyethylene resin, polytetrafluoroethylene resin, polypropylene resin, polystyrene resin, benzoguanamine resin, polymethylbenzoguanamine resin, polyurethane resin, vinyl resin, fluororesin, acrylic resin, and melamine resin; butyl acrylate-vinyl acetate copolymer, styrene-acrylic acid copolymer, silicone resin, and divinylbenzene-styrene copolymer.

[0041] The solid powder cosmetic of the present invention can be produced according to a conventional method. For example, after all the powder components including component (A) are mixed and ground, the oil phase components including components (B), (C) and (D) are added and mixed, the resulting mixture is further ground in a grinder, and the ground product is filled into a container and molded under a molding pressure of 1000 to 2500 kgf to obtain a solid powder cosmetic.

[0042] The solid powder cosmetic composition of the present invention is suitable as a makeup cosmetic composition such as foundation, blusher, eye shadow, etc. The solid powder cosmetic of the present invention can be used with an applicator (such as a sponge) soaked in water. For example, it can be used by rubbing it off with a sponge soaked in water. EXAMPLES

[0043] Examples 1-6, Comparative Examples 1-6 A solid powder cosmetic (foundation) with the composition shown in Table 1 was manufactured and evaluated for ease of removal with water, resistance to unevenness when applied, evenness of finish, lack of powderiness of finish, transparency of finish, water resistance, and ease of removal with soap. The results are also shown in Table 1. It should be noted that the solid powder cosmetic preparation of Comparative Example 1 could not be removed with a sponge soaked in water, and therefore other evaluations could not be performed.

[0044] (Manufacturing method) The powder components including component (A) were mixed uniformly using a Henschel mixer, and the oil components including components (B), (C), and (D) were added to this and further mixed, and then the mixture was pulverized using an atomizer and passed through a sieve. This was then filled into a metal dish and compression molded to obtain a solid powder cosmetic.

[0045] (Evaluation method) (1) Removal when using water: Five expert panelists evaluated the ease of removal of each solid powder cosmetic product when the surface was rubbed with a sponge soaked in water, according to the following criteria. The results are shown as the average score of the five panelists. 5;Very easy to remove. 4;Easy to remove. 3: Can be picked up with normal force. 2: A little difficult to remove; only a small amount can be removed even with force. 1;Cannot be taken.

[0046] (2) Lack of unevenness when applied, uniform finish, lack of powderiness, transparency of finish: Five expert panelists applied each solid powder makeup to their arms with a sponge soaked in water and rated it based on the following criteria: how even the application was, how smooth the finish was after drying, how powdery the finish was, and how transparent the finish was. The results were shown as the average score of the five panelists. (2-1) How easily the application becomes uneven: 5;Very unlikely to become uneven. 4; Less likely to become uneven. 3: Slightly less prone to unevenness. 2: Tends to be somewhat uneven. 1; It is prone to unevenness.

[0047] (2-2) Uniformity of finish after drying: 5;Very uniform. 4;Uniform. 3: Fairly uniform. 2: Not very uniform. 1;Not uniform.

[0048] (2-3) Lack of powderiness in the finished product: 5;Not very powdery. 4;Not powdery. 3;Not too powdery. 2; Slightly powdery. 1; Powdery.

[0049] (2-4) Transparency of the finish: 5;It has a very transparent feel. 4;Transparent. 3: Slightly transparent. 2: It is slightly lacking in transparency. 1;Lack of transparency.

[0050] (3) Water resistance: Five expert panelists applied each solid powder makeup to their arms with a sponge soaked in water, and after a few hours had passed since drying, they washed their hands with tap water and evaluated the water resistance according to the following criteria. The results are shown as the average score of the five panelists. 5;Very hard to fall off. 4;Not easy to fall off. 3: Somewhat difficult to remove. 2: Slightly lower. 1; to fall, to flow.

[0051] (4) Ease of removal with soap: Five expert panelists applied each solid powder makeup to their arms with a sponge soaked in water, and after a few hours had passed since it dried, they washed it off with soap and rated it according to the following criteria. The results were shown as the average score of the five panelists. 5;Very easy to remove. 4;Easy to drop. 3: Somewhat easy to remove. 2: Somewhat difficult to remove. 1;It is difficult to remove and may remain.

[0052] [Table 1]

[0053] Examples 7 to 10 The solid powder cosmetics having the compositions shown in Table 2 were produced in the same manner as in Examples 1 to 6, and all of them were easy to remove with water, were less likely to be uneven when applied, had a uniform finish that was not powdery, had a transparent finish, were highly water resistant, and were easily washable with soap, etc.

[0054] [Table 2]

Claims

1. The following components (A), (B), (C), and (D): (A) Plate-shaped powder treated with alkoxysilane, 20-95% by mass, (B) Nonionic surfactants with an HLB of less than 8, (C) Nonionic surfactant with an HLB of 8 or higher, (D) Oil component that is liquid at 25°C A solid powder cosmetic containing [a specific ingredient].

2. The solid powder cosmetic composition according to claim 1, wherein the mass ratio of component (A) to the total content of components (B) and (C) (A) / [(B) + (C)] is 25 or more.

3. The solid powder cosmetic composition according to claim 1 or 2, wherein the content of component (B) is 0.01 to 5% by mass, the content of component (C) is 0.1 to 5% by mass, and the content of component (D) is 4 to 25% by mass.

4. Furthermore, the solid powder cosmetic composition according to claim 1 or 2, further comprising (E) a coloring pigment treated with alkoxysilane.

5. A solid powder cosmetic composition according to claim 1 or 2, to be used with an applicator moistened with water.