Powdered cosmetic

Abstract

To provide powdered cosmetics that enhance the skin adhesion of silicone-treated powder, ensuring a smooth and even application, superior skin compatibility, and a uniform and beautiful finish without any whitening.SOLUTION: Powdered cosmetics comprise following components (A) and (B): (A) silicone-treated powder and (B) a nonionic surfactant with an HLB of 2-7.SELECTED DRAWING: None

Description

[Technical field]

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

[0002] Powder cosmetics such as loose powders have a smooth feel when used and are used to obtain a uniform and natural finish. Patent Document 1 describes that a powder cosmetic containing talc with a specific average coefficient of friction can be applied evenly to skin where makeup has come off, and is highly effective in fixing makeup. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2012-193128 A Summary of the Invention [Problem to be solved by the invention]

[0004] It has been found that while powder cosmetics containing silicone-treated powders can be applied evenly onto the skin and have excellent cosmetic durability, they have poor adhesion to the skin and also pose problems with the finish when foundation is applied over them. [Means for solving the problem]

[0005] The present inventors have discovered that by using a combination of a silicone-treated powder and a specific nonionic surfactant in a powder cosmetic, the adhesion of the silicone-treated powder to the skin is improved, the powder spreads evenly and smoothly on the skin, blends well with the skin, and a uniform, beautiful finish is obtained without any white cast.

[0006] The present invention comprises the following components (A) and (B): (A) Silicone-treated powder, (B) Nonionic surfactants with HLB of 2 to 7 The present invention relates to a powder cosmetic composition comprising the above-mentioned. Effect of the Invention

[0007] The powder cosmetic of the present invention spreads evenly and smoothly on the skin and has excellent adhesion to the skin, so that it blends well with the skin and can achieve a uniform and beautiful finish without leaving a white cast. Even when a powder foundation is applied over the powder cosmetic of the present invention, it has excellent adhesion, good covering power, and a finish without leaving a white cast. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Component (A) is a silicone-treated powder. There are no limitations on the powder as long as it is one that is commonly used in cosmetics, and examples of the powder that can be used include extender pigments, coloring pigments, and luster pigments. Examples of the extender pigment include inorganic pigments such as silicic acid, silicic anhydride, magnesium silicate, talc, sericite, boron nitride, mica, synthetic mica, glass flakes, synthetic phlogopite, kaolin, clay, bentonite, bismuth oxychloride, zirconium oxide, magnesium oxide, aluminum oxide, calcium sulfate, barium sulfate, magnesium sulfate, calcium carbonate, magnesium carbonate, aluminum silicate, magnesium silicate, silica, alumina, and composite pigments thereof. Specific examples of composite pigments include titanium oxide-coated mica, zinc oxide-coated mica, titanium oxide-zinc oxide-coated mica, iron oxide-coated mica, iron oxide-coated mica titanium, barium sulfate-titanium oxide-coated mica, iron oxide-coated synthetic phlogopite, chromium oxide-coated mica titanium, titanium oxide-coated glass powder, iron oxide-coated glass powder, titanium oxide-containing glass powder, and iron oxide-containing glass powder.

[0009] Examples of color pigments include metal oxides such as titanium oxide, zinc oxide, yellow iron oxide, red iron oxide, black iron oxide, Prussian blue, ultramarine blue, chromium oxide, and chromium hydroxide; metal complexes such as manganese violet and cobalt titanate; inorganic pigments such as carbon black; synthetic organic pigments such as Red No. 3, Red No. 104, Red No. 106, Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 227, Red No. 228, Red No. 230, Red No. 401, Red No. 405, Red No. 505, Orange No. 203, Orange No. 204, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 401, Blue No. 1, and Blue 404; and natural organic pigments such as β-carotene, caramel, and paprika color.

[0010] Luster pigments that can be used include plate-like powders such as mica, synthetic phlogopite, glass, silica, alumina, etc., the surface of which is coated with colorants such as titanium oxide, iron oxide, silicon oxide, Prussian blue, chromium oxide, tin oxide, chromium hydroxide, gold, silver, carmine, organic pigments, etc., as well as film rolls cut into any shape such as polyethylene terephthalate-polymethyl methacrylate laminated powder, polyethylene terephthalate-aluminum vapor-deposited powder, and polyethylene terephthalate-gold vapor-deposited laminated powder.

[0011] Component (A) is such a powder that has been silicone-treated. For example, it is surface-treated by a conventional method using a silicone-based compound such as dimethicone, methylhydrogenpolysiloxane, cyclic silicone, organopolysiloxane modified with trialkoxy groups at one or both ends, crosslinked silicone, silicone resin, fluorine-modified silicone resin, or acrylic-modified silicone. It is sufficient that the powder is at least silicone-treated, and it may also be surface-treated with a compound other than a silicone-based compound. Silicone-treated powder may be treated with a combination of a silicone compound and a hydrophobic non-silicone compound. Examples of hydrophobic non-silicone compound treatment include surface treatments such as alkyl treatment, alkylsilane treatment, metal soap treatment, water-soluble polymer treatment, amino acid treatment, acylated amino acid treatment, lecithin treatment, organic titanate treatment, polyol treatment, acrylic resin treatment, methacrylic resin treatment, and urethane resin treatment, and one or more of these can be used in combination. It should be noted that the silicone-treated powder is preferably a powder that is not treated with a hydrophobic non-silicone compound, and is preferably a silicone-treated powder that is treated only with a silicone compound. As the silicone treatment, dimethicone treatment is preferred from the viewpoints of spreading smoothly on the skin, blending well with the skin, suppressing white cast, and realizing a uniform and beautiful finish.

[0012] Furthermore, from the viewpoints of spreading smoothly on the skin, blending well with the skin, suppressing white cast, and realizing a uniform and beautiful finish, it is preferable for component (A) to contain a plate-like powder. Examples of the plate-like powder include inorganic pigments such as boron nitride, silicic acid, silicic anhydride, magnesium silicate, sericite, talc, mica, kaolin, clay, bentonite, synthetic phlogopite, mica titanium, titanium oxide-coated borosilicate, bismuth oxychloride, zirconium oxide, magnesium oxide, aluminum oxide, calcium sulfate, barium sulfate, magnesium sulfate, calcium carbonate, magnesium carbonate, and composite pigments thereof. Specific examples of composite pigments include titanium oxide-coated mica, iron oxide-coated mica, iron oxide-coated mica titanium, barium sulfate-coated mica titanium, iron oxide-coated synthetic phlogopite, chromium oxide-coated mica titanium, titanium oxide-coated glass powder, iron oxide-coated glass powder, titanium oxide-containing glass powder, and iron oxide-containing glass powder. The plate-like powder preferably contains one or more selected from talc, mica, titanium mica, and barium sulfate-titanium oxide-coated mica, and more preferably contains at least talc, mica, or titanium mica.

[0013] In the present invention, the silicone-treated powder of component (A) is not limited in size, shape, etc., but from the standpoint of spreading smoothly on the skin, blending well with the skin, suppressing white cast, and achieving a uniform, beautiful finish, it is preferable for the volume average particle size to be 0.01 to 40 μm, and more preferably 0.1 to 30 μm. In the present invention, the average particle size is a value measured using ethanol as a dispersion medium with a laser diffraction scattering type particle size distribution analyzer (LMS-350, manufactured by Seishin Enterprise Co., Ltd.) The volume average particle size is the average particle size based on volume, and is the 50% median size.

[0014] The silicone-treated powder of component (A) can be used in one or more kinds, and the content is preferably 20% by mass or more in the total composition, more preferably 30% by mass or more, even more preferably 35% by mass or more, and preferably 99% by mass or less, more preferably 90% by mass or less, and even more preferably 80% by mass or less, from the viewpoints of smooth spreading on the skin, good skin compatibility, suppression of white cast, realization of a uniform and beautiful finish, and good covering power and suppression of white cast even when a powder foundation is applied over it. The content of component (A) is preferably 20 to 99% by mass in the total composition, more preferably 30 to 90% by mass, and even more preferably 35 to 80% by mass.

[0015] The powder cosmetic of the present invention may contain powders other than component (A), such as powders exemplified as component (A) that have not been silicone-treated, or powders that have been hydrophobized other than silicone-treated, etc. These powders may also be used alone or in combination of two or more. In the present invention, the content of all powders including component (A) is preferably 30% by mass or more, more preferably 45% by mass or more, and even more preferably 60% by mass or more, and is preferably 99% by mass or less, and more preferably 98% by mass or less, in order to spread smoothly on the skin, blend well with the skin, and provide good covering power even when a powder foundation is applied over it. The content of all powders including component (A) is preferably 30 to 99% by mass, more preferably 45 to 99% by mass, and even more preferably 60 to 98% by mass, in the entire composition.

[0016] In the present invention, the mass ratio of component (A) to the total powder ((A) / total powder) is preferably 0.3 or more, more preferably 0.35 or more, even more preferably 0.4 or more, and preferably 1 or less, more preferably 0.9 or less, and even more preferably 0.8 or less, from the viewpoints of spreading smoothly on the skin, blending well with the skin, suppressing white cast, realizing a uniform and beautiful finish, and providing good covering power and suppressing white cast even when a powder foundation is applied over it. Furthermore, the mass ratio of component (A) to the total powder ((A) / total powder) is preferably 0.3 to 1, more preferably 0.35 to 0.9, and even more preferably 0.4 to 0.8.

[0017] The component (B) used in the present invention is a nonionic surfactant having an HLB of 2-7. The HLB of component (B) is preferably 2 to 6, and more preferably 2 to 5, from the viewpoints of spreading smoothly on the skin, blending well with the skin, suppressing white cast, achieving a uniform and beautiful finish, and providing good covering power and suppressing white cast even when a powder foundation is applied over it. In the present invention, HLB (Hydrophilic-Lipophilic Balance) indicates the molecular weight of the hydrophilic group portion in the total molecular weight of the surfactant, and is calculated by Griffin's formula. When a surfactant is composed of two or more nonionic surfactants, the HLB of the mixed surfactant is the phase arithmetic average of the HLB values ​​of each nonionic surfactant based on the blending ratio, and is calculated as follows. Mixed HLB=Σ(HLBx×Wx) / ΣWx HLBx indicates the HLB value of nonionic surfactant X. Wx denotes the mass (g) of the nonionic surfactant X having a value of HLBx.

[0018] Nonionic surfactants include those used in ordinary cosmetics, such as sorbitan fatty acid esters, glycerin 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.

[0019] From the viewpoints of spreading smoothly on the skin, blending well with the skin, suppressing white cast, achieving a uniform and beautiful finish, and providing good covering power and suppressing white cast even when a powder foundation is applied over it, component (B) preferably contains one or more types selected from sorbitan fatty acid esters and glycerin fatty acid esters, more preferably contains one or more types selected from sorbitan fatty acid esters and polyglycerin fatty acid esters, and more preferably contains one or more types selected from polyglyceryl diisostearate, polyglyceryl triisostearate, and sorbitan isostearate.

[0020] Component (B) can be used alone or in combination of two or more, and the content is preferably 0.01% by mass or more in the total composition, more preferably 0.02% by mass or more, even more preferably 0.05% by mass or more, preferably 3% by mass or less, more preferably 2% by mass or less, and even more preferably 1% by mass or less, from the viewpoints of smooth spreading on the skin, good skin compatibility, suppression of white cast, realization of a uniform and beautiful finish, and good covering power and suppression of white cast even when a powder foundation is applied over it. The content of component (B) is preferably 0.01 to 3% by mass in the total composition, more preferably 0.02 to 2% by mass, and even more preferably 0.05 to 1% by mass.

[0021] The powder cosmetic preparation of the present invention may further contain (C) an oily agent that is liquid at 25° C. The term “liquid” means one that has flowability, and includes a paste-like form. The oil agent of component (C) may be any oil agent that is commonly used in cosmetics, and examples thereof include hydrocarbon oils, ester oils, ether oils, silicone oils, and higher alcohols.

[0022] More specifically, examples of the hydrocarbon oil include straight-chain or branched-chain hydrocarbon oils such as squalane, liquid paraffin, liquid isoparaffin, polybutene, hydrogenated polyisobutene, hydrogenated polydecene, and petrolatum.

[0023] Ester oils include monoester oils, diester oils, triester oils and tetraester oils. Examples of monoester oils include monoesters of aliphatic or aromatic monocarboxylic or dicarboxylic acids having 2 to 24 carbon atoms. Specific examples include cetyl 2-ethylhexanoate, cetyl octanoate, isononyl isononanoate, isotridecyl isononanoate, hexyl laurate, isopropyl myristate, octyldodecyl myristate, myristyl myristate, 2-hexyldecyl myristate, isopropyl palmitate, octyl palmitate, 2-hexyldecyl palmitate, butyl stearate, isocetyl stearate, isocetyl isostearate, decyl oleate, isodecyl benzoate, octyl methoxycinnamate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, 2-ethylhexyl succinate, 2-hexyldecyl adipate, and alkyl benzoates (C12 to C15).

[0024] 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.

[0025] 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.

[0026] 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.

[0027] The ether oils include dialkyl ethers, specifically, dihexyl ether, dicaprylyl ether, cetyl-1,3-dimethylbutyl ether, and the like.

[0028] 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.

[0029] 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.

[0030] The oil agent of component (C) preferably contains a non-volatile oil from the viewpoints of spreading smoothly on the skin, blending well with the skin, allowing for uniform application when powder foundation is layered on top, providing good coverage, and preventing white casts. Non-volatile oil means that the mass loss rate of 1% or less after 1g of the oil agent is spread on a glass petri dish with a diameter of 48 mm and left at 25°C and normal pressure for 24 hours.

[0031] Component (C) may be used alone or in combination of two or more, and the content is preferably 0.1% by mass or more in the total composition, more preferably 0.5% by mass or more, even more preferably 1% by mass or more, preferably 8% by mass or less, more preferably 6% by mass or less, and even more preferably 5% by mass or less, from the viewpoints of smooth spreading on the skin, good skin compatibility, uniform application even when powder foundation is layered, good covering power, and suppression of white cast. The content of component (C) is preferably 0.1 to 8% by mass in the total composition, more preferably 0.5 to 5% by mass, and even more preferably 1 to 5% by mass.

[0032] In the present invention, the mass ratio (B) / (C) of component (B) to component (C) is preferably 0.01 or more, more preferably 0.02 or more, and more preferably 0.4 or less, more preferably 0.3 or less, and even more preferably 0.2 or less, from the viewpoints of smooth spreading on the skin, good skin compatibility, suppression of white cast, realization of a uniform and beautiful finish, and good covering power and suppression of white cast even when a powder foundation is applied over it. The mass ratio (B) / (C) of component (B) to component (C) is preferably 0.01 to 0.4, more preferably 0.01 to 0.3, and even more preferably 0.02 to 0.2.

[0033] The powder cosmetic of the present invention may contain, in addition to the above-mentioned components, components used in ordinary cosmetics, such as oily components other than those mentioned above, surfactants other than those mentioned above, thickeners, preservatives, fragrances, UV absorbers, moisturizers, salts, solvents, antioxidants, chelating agents, neutralizing agents, pH adjusters, blood circulation promoters, cooling agents, antiperspirants, disinfectants, skin activators, etc.

[0034] The powder cosmetic of the present invention can be produced according to a conventional method. For example, after all of the powder components including component (A) are mixed and ground, all of the oil components including component (B) are added and mixed, and the resulting mixture is further ground in a grinder to produce a powdered cosmetic preparation.

[0035] The powder cosmetic of the present invention is in the form of a powder. Specific examples of the powder cosmetic include makeup cosmetics such as powder foundation, face powder, face powder, blusher, and eye shadow; and body powders such as body powder and baby powder. Of these, face powder and face powder are preferred, and the powder cosmetic is suitable as a powdered face powder (loose powder). EXAMPLES

[0036] Examples 1 to 13 and Comparative Examples 1 to 2 A powder cosmetic (loose powder) having the composition shown in Table 1 was produced and evaluated for smooth spreading when spread, compatibility with the skin, lack of white cast, uniform finish, covering power when layered, and lack of white cast when layered. The results are also shown in Table 1.

[0037] (Manufacturing method) After all the powder ingredients including component (A) were mixed and ground, all the oil ingredients including component (B) were added and mixed, and the resulting mixture was further ground in a grinder and filled into a container to obtain a powder cosmetic preparation (loose powder).

[0038] (Evaluation method) (1) Smooth stretch when stretched: Six expert panelists evaluated the smoothness and feel of each powder cosmetic (loose powder) when it was spread on the skin, according to the following criteria. The results were shown as the total score of the six panelists. 5;It spreads very smoothly. 4;It stretches smoothly. 3: Has a fairly smooth spread. 2;It doesn't spread very smoothly. 1;It doesn't spread smoothly.

[0039] (2) Good compatibility with skin: Six expert panelists evaluated the compatibility of each powder cosmetic (loose powder) with the skin when it was spread on the skin, according to the following criteria. The results were shown as the total score of the six panelists. 5; Blends well with skin. 4; Blends well with skin. 3; Blends slightly with the skin. 2;It doesn't blend well with the skin. 1;Does not blend well with skin.

[0040] (3) No white cast: Six expert panelists evaluated the absence of white cast when each powder cosmetic (loose powder) was applied to the skin, using the following criteria. The results were shown as the total score given by the six panelists. 5;There is absolutely no white cast. 4;No white cast. 3;There is not much white cast. 2: There is a slight whitish cast. 1: There is a whitish cast.

[0041] (4) Uniform finish: Six expert panelists evaluated the uniformity of the finish when each powder cosmetic (loose powder) was spread on the skin, using the following criteria. The results were shown as the total score of the six panelists. 5;Fairly uniform. 4. Uniform 3: Fairly uniform. 2;Not very uniform. 1;Not uniform.

[0042] (5) Coverage when layered: Six expert panelists applied each powder cosmetic (loose powder) and then layered a powder foundation on top to evaluate the covering power, using the following criteria. The results were expressed as the total score given by the six panelists. 5.Excellent coverage. 4;High coverage. 3: Slightly high coverage. 2;The coverage is not very good. 1;It doesn't have high coverage.

[0043] (6) No white cast when layered: Six expert panelists applied each powder cosmetic (loose powder) and then layered a powder foundation on top to evaluate whether it left a white cast, using the following criteria. The results were expressed as the total score given by the six panelists. 5;There is absolutely no white cast. 4;No white cast. 3;There is not much white cast. 2: There is a slight whitish cast. 1: There is a whitish cast.

[0044] [Table 1]

Claims

**Claim 1** The following components (A) and (B): (A) Silicone-treated powder (B) Nonionic surfactant with an HLB of 2 to 7 A powdered cosmetic containing the same. **Claim 2** The powdered cosmetic according to Claim 1, wherein component (A) contains at least plate-shaped powder. **Claim 3** The powdered cosmetic according to Claim 1, wherein component (B) contains one or more selected from sorbitan fatty acid esters and glycerin fatty acid esters. **Claim 4** The powdered cosmetic according to Claim 1 or 2, wherein the content of component (A) is 20 to 99% by mass and the content of component (B) is 0.01 to 3% by mass. **Claim 5** The powdered cosmetic according to Claim 1 or 2, wherein the mass ratio of component (A) to the total powder ((A) / total powder) is 0.3 to 1.