cosmetics

Abstract

To provide a cosmetic which contains a hydrophobized silica powder dispersed in an aqueous solvent and can absorb sebum without whitening on the skin after application.SOLUTION: There is provided a cosmetic which contains a hydrophobized silica powder dispersed in an aqueous solvent, a nonvolatile oil and a dispersant, where (i) the hydrophobized silica powder is hydrophobized by a silicone-based hydrophobizing agent and the nonvolatile oil is a nonvolatile silicone oil or (ii) the hydrophobized silica powder is hydrophobized by a fatty acid-based hydrophobizing agent and the nonvolatile oil is a nonvolatile hydrocarbon oil.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a cosmetic preparation comprising a hydrophobic treated silica powder dispersed in an aqueous solvent. [Background technology]

[0002] In recent years, various cosmetic products have been developed to meet various needs.

[0003] For example, Patent Document 1 discloses a composition that has a pore-correcting effect and a feel similar to that of a skin care cosmetic, the composition comprising an aqueous medium, a lipophilic porous powder dispersed in the aqueous medium, an oil component having a viscosity of 100 mPa·s or less that is held in at least some of the pores of the lipophilic porous powder, and a dispersant that disperses the lipophilic porous powder in the aqueous medium. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2017 / 073758 Summary of the Invention [Problem to be solved by the invention]

[0005] On the other hand, up until now, cosmetics in which a hydrophobic treated silica powder is blended as a lipophilic porous powder in an aqueous solvent have not been sufficiently studied in cosmetics that use an aqueous solvent as a continuous phase.

[0006] Therefore, the present inventors have been working on the development of a cosmetic composition in which hydrophobic treated silica powder is blended as a lipophilic porous powder in an aqueous solvent in order to obtain a cosmetic lasting effect. However, although cosmetics in which hydrophobic treated silica powder is blended in an aqueous solvent can absorb sebum when applied to the skin, there is a problem in that the hydrophobic treated silica powder appears white on the skin.

[0007] The problem of the blended powder appearing unnaturally white on the skin after application is known in cosmetics formulated with lipophilic porous powder, as described in Patent Document 1, for example. Patent Document 1 reports that simply blending crosslinked polymethyl methacrylate as a lipophilic porous powder into an aqueous dispersion medium results in whitening due to an excessive light scattering effect. This problem is solved by retaining an oil with a viscosity of 100 mPa s or less in at least a portion of the pores of the crosslinked polymethyl methacrylate as a lipophilic porous powder, thereby appropriately suppressing light scattering.

[0008] However, when using hydrophobic treated silica powder as the lipophilic porous powder, even if oil similar to that in Patent Document 1 is retained in some of the pores of the hydrophobic treated silica powder, the problem of it appearing white on the skin could not be solved. [Means for solving the problem]

[0009] The present invention seeks to improve the above-mentioned circumstances, and its object is to provide a cosmetic that contains hydrophobically treated silica powder dispersed in an aqueous solvent and that can absorb sebum without turning white on the skin after application.

[0010] The present invention that achieves the above object is as follows.

[0011] <Aspect 1> an aqueous solvent; a hydrophobic treated silica powder dispersed in the aqueous solvent; A non-volatile oil, a dispersant; and and (i) the hydrophobically treated silica powder has been hydrophobically treated with a silicone-based hydrophobizing agent, and the non-volatile oil is a non-volatile silicone oil, or (ii) the hydrophobically treated silica powder has been hydrophobically treated with a fatty acid-based hydrophobizing agent, and the non-volatile oil is a non-volatile hydrocarbon oil; Cosmetics. <Aspect 2> A cosmetic preparation according to Aspect 1, wherein the hydrophobically treated silica powder has been hydrophobically treated with a dimethicone-based hydrophobizing agent, and the non-volatile oil is non-volatile dimethicone. <Aspect 3> 3. The cosmetic preparation according to claim 1, wherein the hydrophobic treated silica powder has an oil absorption of oleic acid of 1.0 ml / g or more. <Aspect 4> A cosmetic preparation according to any one of Aspects 1 to 3, wherein the content of the hydrophobic treated silica powder is 1.0 to 20% by mass. <Aspect 5> A cosmetic preparation according to any one of Aspects 1 to 4, wherein the content of the non-volatile oil is 1.0 to 40% by mass. <Aspect 6> A cosmetic preparation according to any one of Aspects 1 to 5, which is for correcting pores. <Aspect 7> A cosmetic preparation according to any one of aspects 1 to 6, having a viscosity of 100,000 mPa·s or less at 25°C. <Aspect 8> A cosmetic preparation according to any one of Aspects 1 to 7, wherein the ratio of the volume content of the non-volatile oil to the maximum oil absorption of the hydrophobic silica powder ("volume content of non-volatile oil" / "maximum oil absorption of hydrophobic silica powder") is 0.3 or greater and less than 1.0. [Effects of the Invention]

[0012] According to the present invention, it is possible to provide a cosmetic that contains hydrophobically treated silica powder dispersed in an aqueous solvent, and that can absorb sebum without turning white on the skin after application. DETAILED DESCRIPTION OF THE INVENTION

[0013] Cosmetics The cosmetic of the present invention comprises: an aqueous solvent; a hydrophobic treated silica powder dispersed in the aqueous solvent; A non-volatile oil, a dispersant; and and (i) The hydrophobically treated silica powder is hydrophobically treated with a silicone-based hydrophobizing agent, and the non-volatile oil is a non-volatile silicone oil, or (ii) The hydrophobically treated silica powder has been hydrophobically treated with a fatty acid-based hydrophobizing agent, and the non-volatile oil is a non-volatile hydrocarbon oil.

[0014] As a result of extensive research by the present inventors into the above-mentioned problem of the hydrophobic treated silica powder causing a white appearance on the skin after application, it was discovered that this problem could be solved by selecting an appropriate combination of hydrophobic treated silica powder and non-volatile oil, leading to the completion of the present invention.

[0015] Here, an appropriate combination of hydrophobically treated silica powder and non-volatile oil is either (i) a combination in which the hydrophobically treated silica powder has been hydrophobically treated with a silicone-based hydrophobizing agent and the non-volatile oil is a non-volatile silicone oil, or (ii) a combination in which the hydrophobically treated silica powder has been hydrophobically treated with a fatty acid-based hydrophobizing agent and the non-volatile oil is a non-volatile hydrocarbon oil.

[0016] More specifically, examples of suitable combinations include, but are not limited to, (i-1) a combination in which the hydrophobically treated silica powder has been hydrophobically treated with a dimethicone-based hydrophobizing agent and the non-volatile oil is non-volatile dimethicone, or (ii-1) a combination in which the hydrophobically treated silica powder has been hydrophobically treated with a fatty acid-based hydrophobizing agent and the non-volatile oil is hydrogenated polydecene.

[0017] <Hydrophobic treated silica powder> The cosmetic of the present invention contains a hydrophobically treated silica powder dispersed in an aqueous solvent. The inclusion of the hydrophobically treated silica powder allows the cosmetic to absorb sebum, preventing makeup from running due to sebum. The hydrophobically treated silica powder also penetrates into the recesses of skin pores, making the unevenness of the pores less noticeable.

[0018] In the present invention, the hydrophobically treated silica powder refers to silica powder whose surface has been subjected to a hydrophobizing treatment. Here, the hydrophobizing treatment may be a treatment with a silicone-based hydrophobizing agent or a treatment with a fatty acid-based hydrophobizing agent.

[0019] More specifically, examples of silicone-based hydrophobic treatment agents include, but are not limited to, dimethicone-based hydrophobic treatment agents, methicone-based hydrophobic treatment agents, etc. Furthermore, examples of fatty acid-based hydrophobic treatment agents include, but are not limited to, stearic acid hydrophobic treatment agents, isostearic acid hydrophobic treatment agents, etc.

[0020] In the present invention, the silica powder may be porous silica particles or silica particles having an uneven surface, but from the viewpoint of improving the sebum absorption effect, porous silica particles are preferred. The shape of the silica particles is not particularly limited, and may be, for example, spherical, approximately spherical, or spheroidal.

[0021] The average particle size of the hydrophobic treated silica powder is not particularly limited and may be, for example, 2.0 μm or more, 3.0 μm or more, 4.0 μm or more, or 5.0 μm or more, or 20 μm or less, 15 μm or less, or 10 μm or less. In the present invention, the average particle size can be calculated as the number average of the diameter of a circle equivalent to the projected area of ​​primary particles observed by SEM or TEM.

[0022] In the present invention, the oil absorption of the hydrophobic treated silica powder is evaluated by the amount (ml) of oleic acid that the hydrophobic treated silica powder can absorb per gram (i.e., "oil absorption of oleic acid (ml / g)"). In the present invention, the oil absorption of oleic acid of the hydrophobic treated silica powder may be 1.0 ml / g or more, 1.1 ml / g or more, 1.2 ml / g or more, 1.3 ml / g or more, 1.4 ml / g or more, 1.5 ml / g or more, 1.6 ml / g or more, 1.7 ml / g or more, 1.8 ml / g or more, 1.9 ml / g or more, 2.0 ml / g or more, 2.1 ml / g or more, 2.2 ml / g or more, or 2.3 ml / g or more, from the viewpoint of improving the sebum absorption effect, and may be 8 ml / g or less, from the viewpoint of uniformly absorbing sebum on the skin.

[0023] The oil absorption of oleic acid of the hydrophobic treated silica powder can be determined, for example, by referring to "JIS-K JIS K 5101-13-1 Japanese Industrial Standards Pigment Test Methods - Part 13: Oil Absorption - Section 1: Refined Linseed Oil Method."

[0024] In the present invention, commercially available hydrophobic treated silica powder may be used.

[0025] In the cosmetic of the present invention, the content of the hydrophobic treated silica powder may be, from the viewpoint of improving the sebum absorption effect, 1.0% by mass or more, 2.0% by mass or more, 3.0% by mass or more, 4.0% by mass or more, 5.0% by mass or more, 6.0% by mass or more, 7.0% by mass or more, 8.0% by mass or more, 9.0% by mass or more, 10% by mass or more, 11% by mass or more, 12% by mass or more, 13% by mass or more, 14% by mass or more, 15% by mass or more, 16% by mass or more, 17% by mass or more, or 18% by mass or more, relative to the total amount of the cosmetic; and, from the viewpoint of dispersibility, the content may be 30% by mass or less, 29% by mass or less, 28% by mass or less, 27% by mass or less, 26% by mass or less, 25% by mass or less, 24% by mass or less, 23% by mass or less, 22% by mass or less, or 21% by mass or less, relative to the total amount of the cosmetic.

[0026] In the cosmetic of the present invention, the hydrophobic treated silica powder is dispersed in an aqueous solvent. The dispersed state of the hydrophobic treated silica powder is preferably such that, for example, the sedimentation rate when left standing at 25°C for 1 day is 1.0 mass% or less. The sedimentation rate may be measured, for example, by referring to the "Soil Particle Size Test Method" specified in JIS A 1204:2020.

[0027] <Non-volatile oil> The cosmetic of the present invention contains a non-volatile oil. The non-volatile oil may be a non-volatile silicone oil or a non-volatile hydrocarbon oil. In the present invention, "non-volatile" refers to a substance that exhibits a volatile content of 5% or less when left at 105°C for 3 hours. Here, the volatile content refers to the weight change rate measured by a gravimetric method after placing filter paper on a glass petri dish and dropping about 0.2 g of a sample. In contrast, "volatile" refers to a substance that exhibits a volatile content of more than 5% when left at 105°C for 3 hours under atmospheric pressure.

[0028] In the present invention, examples of non-volatile silicone oils include non-volatile dimethicone, caprylyl methicone, and phenyl-modified silicone, with non-volatile dimethicone being most preferred.

[0029] In the present invention, examples of non-volatile hydrocarbon oils include, but are not limited to, hydrogenated polydecene, squalane, and petrolatum.

[0030] Furthermore, from the viewpoint of further exerting the effects of the present invention, the non-volatile oil preferably has a viscosity of 100 mPa·s or less at 25° C., and preferred examples thereof include those having a viscosity of 100 mPa·s or less, 90 mPa·s or less, 80 mPa·s or less, 70 mPa·s or less, 60 mPa·s or less, 50 mPa·s or less, 40 mPa·s or less, 30 mPa·s or less, 20 mPa·s or less, or 10 mPa·s or less at 25° C. Alternatively, the viscosity at 25° C. may be 2 mPa·s or more or 5 mPa·s or more.

[0031] In the present invention, the viscosity can be confirmed by measuring, for example, using a BL type viscometer (manufactured by Shibaura Systems Co., Ltd.) with rotor No. 3 at 12 rpm for 60 seconds at 25°C.

[0032] The non-volatile oil may be commercially available, including, but not limited to, hydrogenated polydecene, squalane, liquid paraffin, and petrolatum.

[0033] In the cosmetic of the present invention, the content of the non-volatile oil may be 1.0% by mass or more, 2.0% by mass or more, 3.0% by mass or more, 4.0% by mass or more, 5.0% by mass or more, 6.0% by mass or more, 7.0% by mass or more, 8.0% by mass or more, 9.0% by mass or more, 10% by mass or more, 11% by mass or more, 12% by mass or more, 13% by mass or more, 14% by mass or more, 15% by mass or more, 16% by mass or more, 17% by mass or more, 18% by mass or more, 19% by mass or more, or 20% by mass or more, relative to the total amount of the cosmetic, from the viewpoint of preventing the hydrophobic treated silica powder from appearing white on the skin; and from the viewpoint of improving sebum absorbency, the content of the non-volatile oil may be 40% by mass or less, 35% by mass or less, 30% by mass or less, 25% by mass or less, or 20% by mass or less, relative to the total amount of the cosmetic.

[0034] In addition, in order to balance the objective of suppressing the hydrophobic treated silica powder from appearing white on the skin and the objective of improving sebum absorption, the volume ratio of non-volatile oil to the maximum oil absorption of the hydrophobic treated silica powder may be appropriately adjusted. For example, in the cosmetic of the present invention, the ratio of the volume content of non-volatile oil to the maximum oil absorption of the hydrophobic silica powder ("volume content of non-volatile oil" / "maximum oil absorption of the hydrophobic silica powder") is, for example, 0.05 or more, 0.08 or more, 0.10 or more, 0.15 or more, 0.20 or more, 0.25 or more, 0.30 or more, 0.35 or more, 0.40 or more, 0.45 or more, 0.50 or more, 0.55 or more, 0.60 or more, 0.65 or more, It may be 0.70 or more, or 0.75 or more, and may be less than 1.0, 0.95 or less, or 0.90 or less. The maximum oil absorption of the hydrophobic silica powder is the value obtained by multiplying the oil absorption of the hydrophobic silica powder with respect to oleic acid (ml / g) by the content (g) of the hydrophobic silica powder contained in the cosmetic.

[0035] <Dispersant> The cosmetic preparation of the present invention contains a dispersant, which is mainly used to disperse the hydrophobic treated silica powder in an aqueous solvent.

[0036] In the present invention, the dispersant may be, for example, a dispersant made of a polymer, and more specifically, examples thereof include, but are not limited to, acrylic polymers and cross-linked acrylic acid copolymers.

[0037] where: acrylicExamples of the polymers include n-butyl (meth)acrylate, isobutyl (meth)acrylate, t-butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, n-hexyl (meth)acrylate, n-octyl (meth)acrylate, cyclohexyl (meth)acrylate, decyl (meth)acrylate, undecyl (meth)acrylate, lauryl (meth)acrylate, tridecyl (meth)acrylate, myristyl (meth)acrylate, pentadecyl (meth)acrylate, palmityl (meth)acrylate, heptadecyl (meth)acrylate, ) Stearyl acrylate, isostearyl (meth)acrylate, oleyl (meth)acrylate, behenyl (meth)acrylate, (meth)acrylic acid esters having a linear, branched or alicyclic hydrocarbon group; acrylonitrile; (meth)acrylamides such as acrylamide, diacetone acrylamide, N,N-dimethylacrylamide, Nt-butylacrylamide, N-octylacrylamide, and Nt-octylacrylamide; (meth)acrylamides containing a sulfonic acid group such as 2-(meth)acrylamido-2-methylpropanesulfonic acid; amino Alkylaminoalkyl (meth)acrylates such as ethyl (meth)acrylate, t-butylaminoethyl methacrylate, and methylaminoethyl (meth)acrylate; dialkylaminoalkyl (meth)acrylates such as dimethylaminoethyl (meth)acrylate and diethylaminoethyl (meth)acrylate; dialkylaminoalkyl (meth)methacrylamides such as dimethylaminoethyl (meth)acrylamide and diethylaminoethyl (meth)acrylamide; esters of cyclic compounds and meth)acrylic acid such as tetrahydrofurfuryl (meth)acrylate, isobornyl (meth)acrylate, and glycidyl (meth)acrylate; alkoxyalkyl (meth)acrylate esters such as ethoxyethyl (meth)acrylate and methoxyethyl (meth)acrylate; monoesters of polyalkylene glycols and (meth)acrylic acid such as polyethylene glycol mono(meth)acrylate and polypropylene glycol mono(meth)acrylate; sulfonic acid group-containing (meth)acrylic esters; methacryloyloxyalkyl phosphate monoesters such as (meth)acryloyloxyethyl phosphate;Glyceryl (meth)acrylate, 2-methacryloyloxyethyl succinate, 2-(meth)acryloyloxyethyl phthalate, β-carboxyethyl acrylate, acryloyloxyethyl succinate, 2-(meth)acryloyloxyethyl tetrahydrophthalate, 2-(meth)acryloyloxyethyl hexahydrophthalate; 1,4-butanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, ethylene glycol di(meth)acrylate, polyethylene (n=2-50) glycol di(meth)acrylate, propylene glycol di(meth)acrylate, polypropylene (n=2-50) glycol di(meth)acrylate, butylene glycol di(meth)acrylate, dipentyl glycol di(meth)acrylate, neopentyl glycol di(meth)acrylate, trimethylolpropane di(meth)acrylate, methylene bisacrylamide, bisphenol F EO-modified (n=2-50) di(meth)acrylate, bisphenol A EO-modified (n=2-50) di(meth)acrylate, bisphenol S EO-modified (n=2-50) di(meth)acrylate, trimethylolethane tri(meth)acrylate, trimethylolpropane tri(meth)acrylate, trimethylolpropane tricaprolactonate tri(meth)acrylate, trimethylolhexane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, diglycerin tetra(meth)acrylate, ditrimethylolpropane tetra(meth)acrylate, Examples of the acrylate include ditrimethylolpropane tetracaprolactonate tetra(meth)acrylate, ditrimethylolethane tetra(meth)acrylate, ditrimethylolbutane tetra(meth)acrylate, ditrimethylolhexane tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, dipentaerythritol hexa(meth)acrylate, tripentaerythritol hexa(meth)acrylate, and tripentaerythritol hepta(meth)acrylate.

[0038] Examples of crosslinked acrylic acid copolymers include, but are not limited to, acrylic acid / alkyl methacrylate copolymers, more specifically, (acrylates / C10-30 alkyl acrylate) crosspolymers and (hydroxyethyl acrylate / sodium acryloyldimethyltaurate) copolymers.

[0039] The dispersant may include a surfactant having a dispersing effect, which may be selected from, for example, anionic surfactants, cationic surfactants, amphoteric surfactants, and nonionic surfactants.

[0040] The cosmetic of the present invention can contain one or more dispersants. The content of the dispersant in the cosmetic of the present invention may be 0.01% by mass or more, 0.03% by mass or more, 0.05% by mass or more, 0.1% by mass or more, 0.5% by mass or more, or 0.7% by mass or more, relative to the total amount of the cosmetic, and may be 2.0% by mass or less, 1.5% by mass or less, or 1.0% by mass or less.

[0041] <Aqueous solvent> The cosmetic preparation of the present invention contains an aqueous solvent. The aqueous solvent is a medium containing water as a main component, and may be water alone or may contain a lower alcohol and / or a polyhydric alcohol.

[0042] The water may be ion-exchanged water, purified water, or tap water.

[0043] Examples of lower alcohols include, but are not limited to, ethanol, propanol, and isopropanol.

[0044] Examples of polyhydric alcohols include, but are not limited to, dihydric alcohols such as ethylene glycol, propylene glycol, trimethylene glycol, 1,2-butylene glycol, 1,3-butylene glycol, tetramethylene glycol, and 2,3-butylene glycol, and trihydric alcohols such as glycerin. The polyhydric alcohols may be blended as other ingredients (e.g., moisturizers) contained in cosmetics.

[0045] Furthermore, the content of the aqueous solvent in the cosmetic of the present invention may be 10% by mass or more, 20% by mass or more, 30% by mass or more, 30% by mass or more, 40% by mass or more, or 50% by mass or more, relative to the total amount of the cosmetic, and may be 95% by mass or less, 90% by mass or less, 85% by mass or less, or 80% by mass or less.

[0046] <Other ingredients> The cosmetic of the present invention may contain the above-mentioned components (i.e., hydrophobically treated silica powder, non-volatile oil, dispersant, and aqueous solvent) in a total amount of 50% by mass or more, 60% by mass or more, 70% by mass or more, 80% by mass or more, or 90% by mass or more relative to the total amount of the cosmetic. Furthermore, the cosmetic of the present invention may further contain other components in addition to these components, as long as the effects of the present invention are not impaired. The following provides an illustrative explanation of these other components, but does not limit the cosmetic of the present invention.

[0047] The cosmetic preparation of the present invention may further contain a moisturizing agent, such as polyethylene glycol, propylene glycol, glycerin, 1,3-butylene glycol, xylitol, sorbitol, maltitol, chondroitin sulfate, hyaluronic acid, mucoitin sulfate, caronic acid, atelocollagen, sodium lactate, dl-pyrrolidone carboxylate, short-chain soluble collagen, diglycerin (EO)PO adduct, Rosa illustrator extract, Achillea millefolium extract, and Melilot extract, but is not limited to these.

[0048] The cosmetic of the present invention may further contain powder components other than the hydrophobic treated silica powder. Examples of such powder components include inorganic powders (e.g., talc, kaolin, mica, sericite, muscovite, phlogopite, synthetic mica, lepidolite, biotite, vermiculite, magnesium carbonate, calcium carbonate, aluminum silicate, barium silicate, calcium silicate, magnesium silicate, strontium silicate, metal tungstate, magnesium, silica, zeolite, barium sulfate, calcined calcium sulfate (calcined gypsum), calcium phosphate, fluorapatite, hydroxyapatite, ceramics, etc.). Powder, metal soap (e.g., zinc myristate, calcium palmitate, aluminum stearate), boron nitride, etc.); organic powder (e.g., polyamide resin powder (nylon powder), polyethylene powder, polymethyl methacrylate powder, polystyrene powder, styrene-acrylic acid copolymer resin powder, benzoguanamine resin powder, polytetrafluoroethylene powder, cellulose powder, etc.); inorganic white pigment (e.g., zinc oxide, etc.); inorganic red pigment (e.g., iron titanate, etc.); inorganic purple pigment (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, iron blue, etc.); pearl pigments (e.g., titanium dioxide coated mica, titanium dioxide coated bismuth oxychloride, titanium dioxide coated talc, colored titanium dioxide coated mica, bismuth oxychloride, fish scale foil, etc.); metal powder pigments (e.g., aluminum powder, copper powder, etc.); organic pigments such as zirconium, barium or aluminum lake (e.g., red 20 organic pigments such as Red No. 1, Red 202, Red 204, Red 205, Red 220, Red 226, Red 228, Red 405, Orange 203, Orange 204, Yellow 205, Yellow 401, and Blue 404; Red No. 3, Red 104, Red 106, Red 227, Red 230, Red 401, Red 505, Orange 205, Yellow 4, Yellow 5, Yellow 202, Yellow 203, Green 3, and Blue 1; natural pigments (e.g., chlorophyll, beta-carotene, etc.), and the like.

[0049] The cosmetic of the present invention may further contain a liquid oil. Examples of liquid oils include, but are not limited to, avocado oil, camellia oil, macadamia nut oil, corn oil, olive oil, rapeseed 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, germ oil, and triglycerin.

[0050] The cosmetic of the present invention may further contain a solid oil or fat, such as, but not limited to, cocoa butter, coconut oil, hydrogenated coconut oil, palm oil, palm kernel oil, Japan wax kernel oil, hydrogenated oil, Japan wax, and hydrogenated castor oil.

[0051] The cosmetic of the present invention may further contain waxes, such as beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, ivota wax, montan wax, rice bran wax, kapok wax, sugarcane wax, hexyl laurate, jojoba wax, shellac wax, POE lanolin alcohol ether, POE lanolin alcohol acetate, and POE cholesterol ether, but are not limited to these.

[0052] The cosmetic of the present invention may further contain a higher fatty acid, such as, but not limited to, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, undecylenic acid, tall acid, isostearic acid, linoleic acid, linolenic acid, eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA).

[0053] The cosmetic preparation of the present invention may further contain a higher alcohol. Examples of higher alcohols include, but are not limited to, straight-chain alcohols (e.g., lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, cetostearyl alcohol, etc.); branched-chain alcohols (e.g., monostearyl glycerin ether (batyl alcohol), 2-decyltetradecynol, cholesterol, phytosterol, hexyldodecanol, isostearyl alcohol, octyldodecanol, etc.).

[0054] The cosmetic preparation of the present invention may further contain a surfactant for the purpose of emulsification, in addition to the dispersant. Such surfactant may be selected from, for example, anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants, etc.

[0055] The cosmetic of the present invention may further contain an ultraviolet absorber. Examples of the ultraviolet absorber include benzoic acid-based ultraviolet absorbers (e.g., para-aminobenzoic acid (hereinafter abbreviated as PABA), PABA monoglycerin ester, N,N-dipropoxy PABA ethyl ester, N,N-diethoxy PABA ethyl ester, N,N-dimethyl PABA ethyl ester, N,N-dimethyl PABA butyl ester, N,N-dimethyl PABA ethyl ester, etc.); anthranilic acid-based ultraviolet absorbers (e.g., homomenthyl-N-acetylanthranilate, etc.); salicylic acid-based ultraviolet absorbers (e.g., amyl salicylate, etc.); cinnamic acid-based ultraviolet absorbers (e.g., octyl cinnamate, ethyl 4-isopropyl cinnamate, methyl 2,5-diisopropyl cinnamate, ethyl 2,4-diisopropyl cinnamate, methyl 2,4-diisopropyl cinnamate, propyl p-methoxycinnamate, isopropyl p-methoxycinnamate, isoamyl p-methoxycinnamate, methyl 2,5-diisopropyl cinnamate, ethyl 2,4-diisopropyl cinnamate, propyl p-methoxycinnamate, isopropyl p-methoxycinnamate, isoamyl p-methoxycinnamate, methyl 2,5-diisopropyl cinnamate, ethyl 2,4-diisopropyl cinnamate, methyl ...methyl 2,4-diisopropyl cinnamate, methyl 2,5-diisopropyl cinnamate, methyl 2,4-diisopropyl cinnamate, methyl 2,5-diisopropyl cinnamate, methyl 2,4-diisopropyl cinnamate, methyl 2,5-diisopropyl cinnamate, methyl 2,4-diisopropyl cinnamate, methyl 2,5-diisopropyl cinnamate, methyl 2,4-diisopropyl cinnamate, methyl 2,5-diisopropyl cinnamate, methyl 2,5-diisopropyl cinnamate, methyl 2,5-diiso cyclohexyl-p-methoxycinnamate, octyl-p-methoxycinnamate (2-ethylhexyl-p-methoxycinnamate), 2-ethoxyethyl-p-methoxycinnamate, cyclohexyl-p-methoxycinnamate, ethyl-α-cyano-β-phenylcinnamate, 2-ethylhexyl-α-cyano-β-phenylcinnamate, glyceryl mono-2-ethylhexanoyl-di-para-methoxycinnamate, etc.; benzophenone-based ultraviolet absorbers (e.g., 2,4-dihydroxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, etc.); non, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2,2',4,4'-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-4'-methylbenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonate, 4-phenylbenzophenone, 2-ethylhexyl-4'-phenyl-benzophenone-2-carboxylate, 2-hydroxy-4-n-octoxybenzophenone, 4-hydroxy-3-carboxybenzophenone, etc.);Examples of suitable benzylamine derivatives include, but are not limited to, 3-(4'-methylbenzylidene)-d,l-camphor, 3-benzylidene-d,l-camphor; 2-phenyl-5-methylbenzoxazole; 2,2'-hydroxy-5-methylphenylbenzotriazole; 2-(2'-hydroxy-5'-t-octylphenyl)benzotriazole; 2-(2'-hydroxy-5'-methylphenylbenzotriazole; dibenzalazine; dianisoylmethane; 4-methoxy-4'-t-butyldibenzoylmethane; 5-(3,3-dimethyl-2-norbornylidene)-3-pentan-2-one, and the like.

[0056] Furthermore, other ingredients that can be blended into the cosmetic composition of the present invention include, but are not limited to, water-soluble polymers, thickeners, monosaccharides, oligosaccharides, organic amines, alkylene oxide derivatives, sequestering agents, antioxidant aids, preservatives, whitening agents, blood circulation promoters, various extracts, activators, and antiseborrheic agents.

[0057] <Viscosity of cosmetics> The viscosity of the cosmetic of the present invention at 25°C is preferably 100,000 mPa·s or less, and more specifically may be, for example, 100,000 mPa·s or less, 80,000 mPa·s or less, 50,000 mPa·s or less, 10,000 mPa·s or less, 8,000 mPa·s or less, 5,000 mPa·s or less, or 1,000 mPa·s or less. A viscosity of 100,000 mPa·s or less allows the cosmetic to have a skin care feel. Furthermore, from the viewpoint of suppressing sedimentation of the hydrophobic treated silica powder, the viscosity of the cosmetic is preferably 100 mPa·s or more.

[0058] <Uses of cosmetics> The cosmetic composition of the present invention may be, for example, for pore correction and / or shine suppression. Here, "pore correction" means making the irregularities of pores less noticeable. Furthermore, "shine suppression" refers to the ability to suppress shine caused by sebum by absorbing sebum in pores.

[0059] Furthermore, the cosmetic of the present invention may be in any formulation, such as a solution, emulsion, lotion, gel, mist, spray, or mousse.

[0060] The product form of the cosmetic of the present invention is not particularly limited, and it can be suitably used, for example, in skin care cosmetics such as lotions, emulsions, serums, creams, whitening agents, eye care creams, and sunscreen cosmetics, as well as in makeup cosmetics such as foundations and makeup bases.

[0061] <<Method for manufacturing cosmetics>> The cosmetic composition of the present invention can be prepared, for example, by adding hydrophobic treated silica powder, a dispersant, and other optional components to an aqueous solvent, dispersing the hydrophobic treated silica powder, and then dispersing the hydrophobic treated silica powder in a non-volatile solvent selected appropriately according to the type of hydrophobic treated silica powder. oil It can be produced by further adding [Example]

[0062] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these. Unless otherwise specified, the contents are expressed in mass %.

[0063] Preparation of Cosmetic Samples of Examples and Comparative Examples According to the formulations shown in Tables 1 to 3, hydrophobic treated silica powder, dispersant, and other ingredients were added to an aqueous solvent, the hydrophobic treated silica powder was dispersed, and then oil was added to prepare each cosmetic sample.

[0064] <evaluation> (Whiteness rating) Each cosmetic sample prepared above was applied to black sapparatus (artificial leather), and after 15 minutes, five expert panelists evaluated it based on the following criteria. The results are shown in Table 1.

[0065] Evaluation criteria: "A": More than three out of five people answered that whiteness is not noticeable; "B": Three or more out of five people answered that the whiteness was not noticeable, or that the whiteness was visible but barely noticeable (excluding cases where three or more out of five people answered that the whiteness was not noticeable); "C]: More than three out of five people answered that the whiteness was noticeable.

[0066] (Evaluation of sebum absorption effect) 25 μl of each cosmetic sample of the Examples prepared above was applied to a 5 cm x 5 cm piece of artificial leather ("Supra-le", manufactured by Ideatex Japan Co., Ltd.) and left for 15 minutes. 15 μl of oleic acid was then applied on top of the applied sample and left for 30 minutes. Using a gloss meter "VG-2000" (manufactured by Nippon Denshoku Industries Co., Ltd.), the gloss value of each sample on the black Supra-le was measured three times, and the average gloss values ​​obtained are shown in Table 4.

[0067] The lower the gloss value, the less shine there is, i.e., the greater the sebum absorption effect. A gloss value of 3 or less is considered to have a sebum absorption effect. In addition, in Tables 1 to 3, the sebum absorption effect of the measured examples was evaluated based on the following criteria.

[0068] "A": gloss value is less than 2; "B": Gloss value is 2 or more and 3 or less.

[0069] [Table 1]

[0070] [Table 2]

[0071] [Table 3]

[0072] Other ingredients (common) in Tables 1 and 2 are as follows: Other ingredients content (mass%) Sodium metaphosphate (appropriate amount) Glycerin 9.0 Dipropylene Glycol 1.0 1.3-Butylene Glycol 8.0 Phenoxyethanol 0.5 (Acrylates / C10-30 alkyl acrylate) crosspolymer 0.03 Potassium hydroxide (appropriate amount) (Hydroxyethyl acrylate / Sodium acryloyldimethyl taurate) copolymer 0.75 Total (mass % of total cosmetic amount) 19

[0073] [Table 4]

[0074] As is clear from Tables 1 to 4, it was found that all of the cosmetics of Examples 1 to 11 were able to absorb sebum without turning white on the skin after application.

Claims

1. an aqueous solvent; a hydrophobic treated silica powder dispersed in the aqueous solvent; A non-volatile oil, a dispersant; and and (i) the hydrophobically treated silica powder has been hydrophobically treated with a silicone-based hydrophobizing agent, and the non-volatile oil is a non-volatile silicone oil, or (ii) the hydrophobically treated silica powder has been hydrophobically treated with a fatty acid-based hydrophobic treatment agent, and the non-volatile oil is a non-volatile hydrocarbon oil; The ratio of the volume content of the non-volatile oil to the maximum oil absorption of the hydrophobic treated silica powder ("volume content of non-volatile oil" / "maximum oil absorption of the hydrophobic treated silica powder") is 0.3 or more and less than 1.0; Cosmetics.

2. 2. The cosmetic according to claim 1, wherein the hydrophobically treated silica powder has been hydrophobically treated with a dimethicone-based hydrophobizing agent, and the non-volatile oil is non-volatile dimethicone.

3. 3. The cosmetic according to claim 1, wherein the hydrophobic treated silica powder has an oil absorption of oleic acid of 1.0 ml / g or more.

4. The cosmetic preparation according to any one of claims 1 to 3, wherein the content of the hydrophobic treated silica powder is 1.0 to 20% by mass.

5. The cosmetic preparation according to any one of claims 1 to 4, wherein the content of the non-volatile oil is 1.0 to 40% by mass.

6. The cosmetic according to any one of claims 1 to 5, which is for correcting pores.

7. The cosmetic preparation according to any one of claims 1 to 6, having a viscosity of 100,000 mPa·s or less at 25°C.

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