JP6034618B2 - Cosmetics - Google Patents

Description

  The present invention relates to a cosmetic material in which wrinkles and pores are not noticeable and a natural finish can be obtained.

  An important role of cosmetics is to make the skin look more natural and beautiful by modifying the shape of the skin surface such as wrinkles, fine lines, pores, and rough texture. Conventionally, as a method of covering such a form trouble with cosmetics, it has been practiced to blend a pigment having high hiding power such as titanium oxide or iron oxide to increase the covering power and hide pores and fine lines. However, cosmetics containing many pigments with high hiding power are effective against color troubles such as spots and freckles, but are not effective against form troubles such as pores and fine lines. There was a problem that it was conspicuous, the finish was thick, and nature was lost.

  As an improvement of these pigments, polyamide composite particles (for example, Patent Document 1) supporting zirconium oxide on the surface layer portion, composite particles (for example, Patent Document 2) supporting zirconium oxide and aluminum oxide on silicon oxide, and A resin powder in which a powder of titanium oxide or zinc oxide is dispersed therein is hydrophobized (for example, Patent Document 3). However, these composite particles are satisfactory in terms of the pore concealing effect and the natural finish, but the actual situation is that they have not reached a level at which deep wrinkles called so-called wrinkles can be concealed. Accordingly, there has been a strong demand for a cosmetic that can provide a natural finish without noticeable wrinkles on the skin surface, particularly wrinkles.

JP 63-27532 A Japanese Patent Laid-Open No. 2-49717 JP-A-9-30935

  An object of this invention is to provide the cosmetics excellent in the uneven | corrugated concealment effect of the skin surface.

  In order to solve the above-mentioned problems, the present inventors have conducted intensive studies. As a result, the spherical composite resin powder in which titanium oxide and cerium oxide are double-coated has a light dispersibility superior to conventional composite particles. I found out. Furthermore, the present inventor used the spherical composite resin powder in combination with a polymer component having high skin adhesion, and synergistically observed wrinkles and pores compared to the case where each component was used alone. The inventors have found that a natural finish can be obtained without standing, and have completed the present invention.

  That is, in order to achieve the above object, the present invention provides a spherical composite resin powder in which titanium oxide fine particles and cerium oxide fine particles are supported on the surface of the resin powder in this order, oat grain extract, cork oak bark extract, xanthan gum The present invention provides a cosmetic containing at least a skin adhesive polymer selected from the group consisting of a cross polymer, an almond extract, sorghum sap, chrysanthemum root oligosaccharide, and a mixture thereof.

  In one form, the cosmetic according to the present invention contains 1.0 to 30% by mass of the spherical composite resin powder.

  In one form, the cosmetic according to the present invention contains 0.01 to 20% by mass of the skin adhesive polymer.

  In one form of the cosmetic according to the present invention, the spherical resin powder is one or more selected from the group consisting of nylon, polyethylene, polymethyl methacrylate, silicone resin, silicone elastomer, cellulose, and polyurethane resin powder. It is.

  In one form of the cosmetic according to the present invention, the surface of the spherical composite resin powder is subjected to a hydrophobic treatment. The hydrophobizing treatment is, for example, one or more hydrophobizing selected from the group consisting of a silicone oil, a fatty acid metal salt, an N-mono long-chain aliphatic acyl basic amino acid, and a phosphoric ester having a perfluoroalkyl group. This is a treatment using an agent.

  In one form, the cosmetic according to the present invention is a wrinkle / pore concealing cosmetic.

  The cosmetic according to the present invention has the property of being excellent in the uneven surface concealing effect on the skin surface.

  Hereinafter, the cosmetic according to the present invention will be described in more detail. The present invention is not limited to the following embodiments.

[Cosmetics]
The cosmetic according to the present invention contains at least (1) a spherical composite resin powder and (2) a skin adhesive polymer.

(1) Spherical composite resin powder Spherical composite resin powder is a resin powder in which titanium oxide and cerium oxide are supported in this order. Each particle of titanium oxide and cerium oxide is supported to be in a state of being mechanically, physically, or chemically attached to the resin powder. The resin powder is formed by each of the titanium oxide particles and the cerium oxide particles. It will be in a state of being covered twice. That is, the spherical composite resin powder is a composite powder having a three-layer structure using substances having different refractive indexes. The resin powder having a low refractive index is used as a central part, and an intermediate layer made of titanium oxide particles having a high refractive index around the resin powder. And a laminated structure comprising an outermost layer of cerium oxide particles having a medium refractive index.

  The spherical resin powder of the mother powder is not particularly limited as long as it is thermoplastic or has a property such as being soft enough to drive metal particles onto the surface. Examples of the spherical resin powder include nylon resin such as nylon 6 resin, nylon 12 resin, copolymer resin of nylon 6 and nylon 12, polyethylene, polypropylene, polymethyl methacrylate, silicone resin, silicone elastomer, cellulose, and polyurethane resin. The powder is preferably nylon resin powder. These spherical resin powders may be used alone or in combination of two or more.

  The spherical resin powder is more preferably a porous type. The average particle diameter is not particularly limited, but is preferably 0.5 to 100 μm, and particularly preferably 2 to 20 μm. If the average particle diameter of the mother powder is within the above range, when the spherical composite resin powder is blended in cosmetics, it is good in feeling of use, and easily falls into wrinkles and pores by the application operation, and the concave on the skin. Only the site can be selectively hidden. Here, the average particle size is calculated as the particle size at an integrated value of 50% in the particle size distribution obtained by the laser diffraction / scattering method.

  Titanium oxide is fixed on the surface of the resin powder in contact with the surface of the spherical resin powder or at least part of the particles are embedded in the resin powder. The titanium oxide particles may be completely embedded in the resin powder. The titanium oxide particles may or may not be in contact with each other, nothing may exist between the particles, and a resin may exist in the gap. The titanium oxide particles cover the spherical resin powder and constitute an intermediate layer around the spherical resin powder. Although the average particle diameter of the titanium oxide particles is not particularly limited, for example, 0.005 to 2 μm is preferable, and 0.01 to 0.5 μm is particularly preferable. The shape of titanium oxide is not particularly limited, and may be any of a spherical shape, a columnar shape, a rod shape, a plate shape, an indeterminate shape, and the like. The amount of titanium oxide supported is preferably 10 to 50% by mass, more preferably 20 to 40% by mass in the spherical composite resin powder.

  Most of cerium oxide is supported on the surface of spherical resin powder in which titanium oxide is partially embedded. The cerium oxide particles are fixed to the spherical resin powder outside the titanium oxide particles, and constitute the outermost layer around the intermediate layer made of the titanium oxide particles. Although the average particle diameter of the cerium oxide particles is not particularly limited, for example, 0.005 to 2 μm is preferable, and 0.01 to 0.5 μm is particularly preferable because the support property to the mother powder and the sliding property of the spherical composite resin powder are improved. preferable. The shape is not particularly limited, and may be spherical, columnar, rod-like, plate-like, or indefinite. The supported amount of cerium oxide is 5 to 40% by mass, more preferably 10 to 30% by mass in the spherical composite resin powder.

  The average particle diameter of the spherical composite resin powder is preferably 2 to 20 μm. The spherical composite resin powder consists of low refractive index resin powder (refractive index: 1.4 to 1.6) and high refractive index inorganic particles of titanium oxide particles (refractive index: 2.5 to 3.0). The layer and the layer of cerium oxide particles (refractive index: 2.2), which are inorganic particles having medium refractive index, form a three-layer structure having different refractive indexes, so that many refractive points are formed inside the composite resin powder. Causing the light entering inside to diffuse strongly. Therefore, the spherical composite resin powder has a high light diffusibility, and is excellent in the effect of entering the concave portion of the skin surface and making wrinkles and pores inconspicuous. In particular, the spherical composite resin powder is excellent in that it can produce a natural finish while having high light diffusibility compared to conventional composite particles. The spherical composite resin powder has, for example, an unevenness concealment effect that is approximately twice as large as that of general powder talc and approximately 1.4 times that of cerium oxide-coated titanium oxide-containing silica as pore concealment powder. ing.

  The spherical composite resin powder is produced by supporting titanium oxide on the surface of the resin powder and further supporting cerium oxide on the surface. The method for supporting titanium oxide and cerium oxide on the resin powder as the mother powder is not particularly limited, but for example, it can be supported by a dry blend method. In the dry blending method, for example, spherical resin powder as a base powder and titanium oxide are charged in a mixing apparatus such as a Henschel mixer or a tumbler mixer at the above-described ratio. Two powders are mixed with a rotating blade in the apparatus at a peripheral speed of 40 m / sec and a physical effect of a centrifugal effect of 750 to 1000 G, and titanium oxide is adhered to the surface of the spherical resin powder by static electricity generated at that time. And in order to strengthen the coupling | bonding of spherical resin powder and titanium oxide, the physical force of the peripheral speed 70m / sec and the centrifugal effect 2000-3500G is given continuously. By this treatment, a stronger shearing force or impact force acts between both particles, the surface of the spherical resin powder is partially softened, titanium oxide is shot into this surface and firmly bonded, and the spherical resin that is the mother powder A composite powder having titanium oxide supported on the powder is produced. Next, cerium oxide is added to the composite powder at the above-described ratio, and the mixture is mixed with a peripheral speed of 40 m / second and a centrifugal force of 750 to 1000 G, as in the case of titanium oxide, and then the peripheral speed of 70 m / second. Second, a composite effect having a centrifugal effect of 2000 to 3500 G is continuously applied to form a composite, and a composite powder having a three-layer structure further supporting cerium oxide is produced on the surface of the composite powder having a two-layer structure supporting titanium oxide.

  The spherical composite resin powder may be further subjected to a hydrophobizing treatment using a hydrophobizing agent, thereby imparting excellent water and oil repellency. The hydrophobizing agent is not particularly limited, and examples thereof include silicone oil, fatty acid metal salt, N-mono long chain (carbon number 8 to 22) aliphatic acyl basic amino acid, phosphate ester having a perfluoroalkyl group, and the like. And a phosphoric acid ester having a silicone oil or a perfluoroalkyl group is preferred. These may be used alone or in combination of two or more.

The spherical composite resin powder is treated with silicone oil by dissolving at least one silicone oil such as dimethylpolysiloxane, cyclic dimethylpolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, etc. in an appropriate amount of hexane or the like. There is a method in which after the solvent is distilled off, it is treated at 100 to 200 ° C. for 2 to 10 hours and then dried. As a method of treating with a phosphoric ester having a perfluoroalkyl group, diheptadecafluorodecyl phosphorus is mixed with spherical resin powder in a mixing and stirring device such as a Henschel mixer, a vibration ball mill, a rotary ball mill, or a super mixer. Pars such as acid [(C ₈ F ₁₇ C ₂ H ₄ O) ₂ P (O) (OH)], heptadecafluorodecyl phosphate [C ₈ F ₁₇ C ₂ H ₄ OP (O) (OH) ₂ ] Phosphoric ester having a fluoroalkyl group is added as it is or dissolved in an appropriate solvent (for example, water, ethanol, isopropyl alcohol, chloroform, Freon R113 and a mixed solvent thereof), and added by spraying or dropwise addition. After the dispersion, it can be carried out by room temperature or heat drying. When a perfluoroalkyl group having 8 or more carbon atoms is used as the solvent, the solvent has extremely low fluidity, so that it is dissolved in a fluorine-based solvent such as Freon R113 or hexafluorometaxylene. It is preferable.

  The treatment amount of the hydrophobizing agent is preferably 0.01 to 30% by mass, more preferably 0.5 to 10% by mass with respect to the spherical composite resin powder. Within this range, sufficient water resistance and oil resistance can be obtained, and the feeling in use is also good.

  The content of the spherical composite resin powder in the cosmetic is preferably 0.1% by mass or more in the cosmetic, and 1.0-30% by mass in particular makes the unevenness such as wrinkles and pores inconspicuous. Therefore, it is preferable.

(2) Skin-adhesive polymer As the skin-adhesive polymer, natural saccharides having a property that the film formed on the skin surface by intermolecular hydrogen bonding lifts the skin can be used. The skin adhesive polymer has an effect of forming a film on the skin by evaporating moisture in the cosmetic, and then lifting (lifting) the concave portion of the skin surface by contracting the film. The skin adhesion polymer is selected from the group consisting of oat grain extract, cork oak bark extract, xanthan gum cross polymer, almond extract, sorghum sap, chrysanthemum root oligosaccharide, and mixtures thereof. Particularly preferred is oat grain extract. Commercially available products can be used for both components. As the oat grain extract, for example, OSILIFT manufactured by Silab Corporation can be used. As the cork oak bark extract, for example, Sublift manufactured by ISP Corporation can be used. As the xanthan gum cross polymer, for example, QUICKLIFT manufactured by BASF can be used. As the almond extract, for example, POLYLIFT manufactured by Silab can be used. As sorghum sap, for example, DYNALIFT manufactured by Croda can be used. As the chrysanthemum root oligosaccharide, for example, Tens'Up manufactured by PROVITAL can be used.

0.01-20 mass% is preferable in cosmetics, and, as for content of the skin adhesive polymer in the cosmetics of this invention, 0.5-10 mass% is more preferable. By setting the content of the skin-adhesive polymer to 0.01 to 20% by mass, there is no feeling of stickiness and stickiness peculiar to the polymer, and a good use feeling can be obtained.

  In the cosmetic of the present invention, the content ratio between the spherical composite resin powder and the skin-adhesive polymer component is not particularly limited, but is preferably 60: 1 to 1:10, particularly 10: 1 to 1:10 in terms of mass ratio. 4 is preferable from the viewpoint of the feeling of use and the effect of making the unevenness such as wrinkles and pores inconspicuous. Further, the total content of the spherical composite resin powder and the skin adhesive polymer is preferably 0.1 to 40% by mass in the cosmetic, and 3 to 20% by mass is particularly preferable for unevenness such as wrinkles and pores. This is preferable because it is inconspicuous.

(3) Other components In addition to the spherical composite resin powder and the skin-adhesive polymer, the cosmetic according to the present invention may contain components generally blended into the cosmetic as necessary. Ingredients commonly blended in cosmetics include, for example, oil components, emulsifiers, polyhydric alcohols, moisturizers, sugars, preservatives, antibacterial agents, sequestering agents, and water-soluble polymers. Other cosmetics such as stickers, film formers, neutralizers, pH adjusters, powder components, UV absorbers, UV blockers, vitamins, skin activators, blood circulation promoters, anti-inflammatory agents, whitening agents, etc. Ingredients, medicinal ingredients, physiologically active ingredients, fragrances, pigments, etc. The content of these components in the cosmetic can be appropriately determined by those skilled in the art as long as the effect of concealing the unevenness of the skin surface of the cosmetic is not impaired.

  The oil component is not particularly limited. For example, hydrocarbons such as liquid paraffin and squalane; natural animal and vegetable oils such as olive oil, jojoba oil, avocado oil, soybean oil, meadowweed oil, and lanolin; cetyl 2-ethylhexanoate Fatty acid esters such as isononyl isononate, isononyl isononanoate, isotridecyl isononanoate, isopropyl myristate, isopropyl palmitate, 2-ethylhexyl palmitate, 2-ethylhexyl stearate, stearyl stearate; Triglycerides such as glyceryl ethylhexanoate and polyhydric alcohol fatty acid ester oils; higher alcohols such as cetyl alcohol, stearyl alcohol, isostearyl alcohol, and behenyl alcohol; lauric acid, Higher fatty acids such as stinic acid, palmitic acid, stearic acid, isostearic acid; chain silicone oils such as dimethylpolysiloxane and methylphenylpolysiloxane, cyclic silicone oils such as decamethylcyclopentanesiloxane, trimethylsiloxysilicic acid, silicone gel, Examples thereof include liquid such as silicone powder or solid silicone oil. These oil components can be used alone or in combination of two or more.

  Examples of emulsifiers include anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants, and silicone surfactants as emulsifiers for silicone oils, preferably nonionic Surfactants and silicone surfactants, one or more of which can be used.

  Nonionic surfactants include polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil and derivatives thereof; sorbitan monopalmitate, sorbitan monostearate, sorbitan monooleate, sorbitan palm oil fatty acid, sorbitan tristearate Sorbitan fatty acid esters such as sorbitan trioleate; polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monopalmitate, polyoxyethylene sorbitan monooleate, polyoxyethylene sorbitan tristearate, polyoxyethylene sorbitan trioleate, etc. Polyoxyethylene sorbitan fatty acid ester; polyoxyethylene sorbite monolaurate, polyoxyethylene sorbite tetrastearate Glycerol fatty acid esters such as glyceryl monostearate, glyceryl monostearate, glyceryl monoisostearate; polyoxyethylene glyceryl monostearate, polyoxyethylene glyceryl monoisostearate, polyoxyethylene glyceryl tristearate, tri Polyoxyethylene glyceryl fatty acid esters such as polyoxyethylene glyceryl isostearate and polyoxyethylene glyceryl trioleate; polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, polyoxyethylene Polyoxyethylene alkyl ethers such as octyldodecyl ether; polyethylene monolaurate Polyglycol fatty acid esters such as polyglyceryl monolaurate, polyglyceryl monomyristate, polyglyceryl monostearate, polyglyceryl monostearate, polyglyceryl tristearate, polyglyceryl tristearate, etc. Can be mentioned.

  Examples of the silicone-based surfactant include polyether-modified silicone and polyglycerin-modified silicone.

  Examples of the polyhydric alcohol include glycerin, 1,3-butylene glycol, 1,2-pentanediol, polyethylene glycol, dipropylene glycol, propylene glycol, isoprene glycol, diglycerin and the like.

  Examples of the humectant include xylitol, maltitol, maltose, sorbitol, glucose, fructose, hyaluronic acid, collagen, elastin, sodium lactate, cyclodextrin, pyrrolidone carboxylic acid and salts thereof, natural and synthetic ceramides, and the like.

  Examples of antiseptics and antibacterial agents include benzoic acid, salicylic acid, coalic acid, sorbic acid, p-oxybenzoic acid ester, parachloromethcresol, hexachlorophene, benzalkonium chloride, chlorhexidine chloride, trichlorocarbanilide, photosensitizer, phenoxyethanol Etc.

  Examples of the sequestering agent include edetate salts such as disodium ethylenediaminetetraacetate, edetic acid, and sodium edetate.

  Examples of the water-soluble polymer or thickener include gum arabic, gum tragacanth, galactan, guar gum, carrageenan, pectin, agar, quince seed, dextran, dextrin, pullulan, carboxymethyl starch, collagen, casein, gelatin, methylcellulose, methyl Examples thereof include hydroxypropylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, sodium carboxymethylcellulose, sodium alginate, carboxymethyldextran sodium, carboxyvinyl polymer, bentonite and the like. Examples of the film forming agent include polyalkyl acrylate, eicosene vinylpyrrolidone polymer, ester gum and the like. Examples of the neutralizing agent include potassium hydroxide, sodium hydroxide, triethanolamine, sodium carbonate and the like. Examples of the pH adjuster include lactic acid, citric acid, glycolic acid, succinic acid, tartaric acid, dl-malic acid, potassium carbonate, sodium hydrogen carbonate, ammonium hydrogen carbonate and the like.

  Examples of the powder component include talc, mica, kaolin, silica, sericite, zeolite, polyethylene powder, polystyrene powder, cellulose powder, nylon powder, lauroyl lysine, polymethyl methacrylate powder, boron nitride, barium sulfate, hydroxyapatite, Surfactant metal salt powder such as magnesium carbonate, calcium carbonate, magnesium silicate, aluminum silicate, inorganic white pigment, inorganic red pigment, inorganic yellow pigment, black iron oxide, magnesium stearate, zinc stearate, magnesium myristate, oxidation Examples include pearl pigments such as titanium coated mica, titanium oxide coated talc, and colored titanium oxide coated mica, and organic pigments such as red 201 and red 202. Those treated with the compound are preferred.

  Examples of the ultraviolet absorber include paraaminobenzoic acid, phenyl salicylate, isopropyl methoxycinnamate, ethylhexyl methoxycinnamate, 2,4-dihydroxybenzophenone, and the like. Examples of the ultraviolet blocking agent include fine particle titanium oxide and fine particle zinc oxide.

The medicinal ingredient, for example, coenzyme Q10, vitamin A oil, vitamin A such as retinol, vitamin B ₂ such as riboflavin, B ₆ such as pyridoxine hydrochloride, L- ascorbic acid, L- ascorbic acid magnesium phosphate Vitamin C such as L-ascorbic acid monopalmitate, L-ascorbic acid dipalmitate, L-ascorbic acid-2-glucoside, pantothenic acids such as calcium pantothenate, vitamin D ₂ , cholecalciferol, etc. Vitamin Ds: Vitamins such as vitamin E such as α-tocopherol, tocopherol acetate, and DL-α-tocopherol nicotinate. Whitening agents such as arbutin, ellagic acid, tranexamic acid, placenta extract, glutathione, and yukinoshita extract, skin activators such as royal jelly, beech extract, capsaicin, gingeron, cantalis tincture, ictamol, caffeine, tannic acid, γ-oryzanol And the like, glycyrrhizic acid derivatives, glycyrrhetinic acid derivatives, anti-inflammatory agents such as azulene and allitein, and amino acids such as arginine, serine, leucine and tryptophan. In addition, as a medicinal ingredient, horse chestnut seed extract, chamomile flower extract, scotch peony extract, button extract, parsley extract, beech tree extract, wine yeast extract, grapefruit extract, honeysuckle extract, rice extract, grape extract, hop extract, rice bran extract, loquat extract, green grass Extract, Yokuinin extract, Assembly extract, Merrilot extract, Birch extract, Licorice extract, Peonies extract, Soap extract, Loofah extract, Pepper extract, Lemon extract, Gentian extract, Perilla extract, Aloe extract, Rosemary extract, Sage extract, Keihi extract , Thyme extract, tea extract, seaweed extract, cucumber extract, clove extract, carrot extract, marronnier extract, hamamelis extract, mulberry extract Ougonekisu, St. John's wort extract, mention may be made of hawthorn extract, Centella asiatica extract, kudzu root nodule extract, various extracts such as artichoke leaf extract.

  The cosmetic according to the present invention preferably further contains low-temperature baked zinc oxide for improving makeup sustainability. Content in cosmetics becomes like this. Preferably it is 1-10 mass%.

  The cosmetic according to the present invention is preferably a spherical composite resin powder of 0.1% by mass or more, more preferably 1.0 to 30% by mass, and a skin adhesion polymer preferably 0.01 to 20% by mass, more preferably. Contains 0.5 to 10% by mass and optionally further contains other components. The total content of the spherical composite resin powder and the skin adhesive polymer in the cosmetic is preferably 0.1 to 40% by mass, more preferably 3 to 20% by mass, and the spherical composite resin powder and the skin. The ratio of the content with the adhesive polymer component is preferably a mass ratio of 60: 1 to 1:10, more preferably 10: 1 to 1: 4. The cosmetic according to the present invention has a viscosity at 25 ° C. of preferably 10,000 to 500,000 mPa · s, and more preferably 50,000 to 300,000 mPa · s.

The cosmetic according to the present invention is a cosmetic applied to the skin, for example, skin care cosmetics such as milky lotion, cream, cosmetic liquid, sunscreen milky lotion, foundation, makeup base, blusher, eye shadow, lipstick, etc. It can be used as a make-up cosmetic. In particular, it can be more suitably used as a makeup base, liquid and oily foundation. The cosmetic according to the present invention has an excellent effect of concealing unevenness on the skin surface, makes wrinkles less noticeable, and has a uniform and natural finish. Furthermore, it has an excellent effect on a feeling of use (smooth feeling) and makeup sustainability.

[Preparation method]
The cosmetic according to the present invention can be prepared according to a conventional method. For example, the oil phase component is uniformly mixed, and then the aqueous phase component is added and mixed. The oil phase component preferably contains an oil component and an emulsifier, and may further contain other lipophilic components such as a lipophilic ultraviolet absorber, a lipophilic medicinal component, and a hydrophobized powder component. Good. The water phase component contains a skin-adhesive polymer, and in addition, polyhydric alcohol, moisturizer, sugar, preservative, antibacterial agent, sequestering agent, polymer thickener, neutralizing agent, powder component, ultraviolet ray You may further contain other hydrophilic components, such as an absorber, a ultraviolet blocker, and vitamins. The spherical composite resin powder is contained in the aqueous phase when it has not been hydrophobized. The content of these components is such that the final concentration in the cosmetic is within the above-described preferred range. The temperature at the time of mixing the oil phase component and the water phase component is preferably set to 60 to 80 ° C. Moreover, it is preferable to add a pH adjuster to the mixture as appropriate so that the final cosmetic has a pH of 4.0 to 7.0.

  EXAMPLES Next, although an Example is given and this invention is demonstrated further more concretely, the cosmetics based on this invention are not limited by these Examples.

[Production Example 1: Production of spherical composite resin powder]
44 parts of titanium oxide (JR-800, manufactured by Teika Co., Ltd.) with an average particle diameter of 0.27 μm and 56 parts of nylon powder (TR-1, manufactured by Toray Industries, Inc.) with an average particle diameter of 12.6 μm as a spherical resin powder are weighed. did. These raw materials were put into a high-speed Henschel mixer (Mechanohybrid, manufactured by Mitsui Mining Co., Ltd.) and treated at a peripheral speed of 40 m / sec for 3 minutes. Subsequently, it processed for 15 minutes by peripheral speed 83m / sec and the centrifugal effect 5000G. As time progressed, the composite progressed, and titanium oxide was shot and supported on the surface of the nylon powder. The treated product was recovered after cooling to room temperature.
Next, 80 parts of spherical resin powder supporting titanium oxide and 20 parts of cerium oxide having an average particle diameter of 0.3 μm prepared as described below were weighed.
Cerium oxide was produced as follows. After adding 19.7 g of 31% aqueous hydrogen peroxide to 148.7 mL of 1.6 mol / L cerium chloride aqueous solution, pure water was added to make the total volume 200 mL. Then, the two solutions are dropped and stirred little by little in a beaker to which 50 mL of pure water is added to precipitate the cerium oxide-containing cerium gel. Next, this precipitated gel was heat-treated at 150 ° C. for 24 hours in an autoclave to produce a slurry. This was washed with pure water, filtered and dried. This powder was put into an alumina crucible and baked in an electric furnace in air at 800 ° C. for 2 hours. Then, it grind | pulverizes with an attritor (media grinder attritor, Mitsui Mining Co., Ltd.), and also wash | cleans, filters, dries, and sifts with ethyl alcohol. The cerium oxide after the sieving treatment was a particle having an average particle diameter of 0.3 μm.
These raw materials were put into a high-speed Henschel mixer and processed at a peripheral speed of 40 m / sec for 3 minutes. Subsequently, it processed for 15 minutes by peripheral speed 83m / sec and the centrifugal effect 5000G. With the passage of time, the compounding progressed, and cerium oxide was shot and supported on the surface of titanium oxide. The treated product was recovered after cooling to room temperature. During operation of the high-speed Henschel mixer, cooling water was always allowed to flow into the jacket portion of the apparatus in order to suppress the temperature rise in the apparatus that occurred during the combination.

[Preparation of makeup base for wrinkle cover]
A makeup base for a wrinkle cover having the composition shown in Table 1 was prepared by the following method.
Using a vacuum emulsification stirring device PVQ-5UN (manufactured by Mizuho Kogyo Co., Ltd.), the oil phase components (1) to (7) are heated to about 70 ° C. and uniformly mixed, and then the powder components, plant extracts, and preservatives are used. The components (8) to (14) and the like were gradually added with stirring, and after sufficiently stirring at 50 rpm for 60 minutes with a paddle mixer under reduced pressure, the mixture was cooled to room temperature to obtain a pasty makeup base. Content is shown in mass%.

[Evaluation test of wrinkle cover make-up base]
For the makeup bases of Examples 1 to 3 and Comparative Examples 1 to 3 respectively prepared with the compositions shown in Table 1, the wrinkle hiding effect evaluation test was performed by the following method.
About 0.2 to 0.3 g of the makeup bases of Examples 1 to 3 and Comparative Examples 1 to 3 were applied to the entire eye periphery of women in their 60s who had wrinkles on the corners of the eyes. Was visually evaluated by 10 professional panelists. Determine whether each cosmetic product falls into one of the following evaluation categories: “Wrinkles are inconspicuous”, “Little wrinkles are inconspicuous”, “Slightly wrinkles are conspicuous”, or “Wrinkles are conspicuous”. It was evaluated by.
(Evaluation criteria)
◎ ・ ・ 9 or more people who evaluated “wrinkles are inconspicuous” or “almost no wrinkles” ○ ・ ・ 6 people who evaluated “wrinkles are inconspicuous” or “little wrinkles are inconspicuous” ~ 8 people △ · · · 3 to 5 people who evaluated "wrinkle is inconspicuous" or "almost wrinkle is inconspicuous" × · · · evaluation of "wrinkle is inconspicuous" or "little wrinkle is inconspicuous" Less than 2 people

＊１：ＳＵＮＳＩＬ−Ｔｉｎ Ｎａｔｕｒａｌ Ｗｈｉｔｅ（ＣＯ）（ＳＵＮＪＩＮ ＣＨＭＩＣＡＬ社製）
＊２：ＯＳＩＬＩＦＴ（Ｓｉｌａｂ社製） The results of the evaluation test are shown in Table 1.

* 1: SUNIL-Tin Natural White (CO) (manufactured by SUNJIN CHMICAL)
* 2: OSILIFT (manufactured by Silab)

From the results of Table 1, all the makeup bases of Examples 1 to 3 contain silica-treated titanium oxide-containing silica that is currently widely used in cosmetics for wrinkle covers, instead of the spherical composite resin powder of Production Example 1. It was shown that the effect of concealing wrinkles is remarkably superior to that of the makeup base of Comparative Example 2 to be performed. In particular, almost all the makeup bases of Examples 2 and 3 evaluated that “wrinkles were not noticeable” or “almost no wrinkles were noticeable”, and showed a very excellent wrinkle concealing effect. On the other hand, it was shown that the makeup base of Comparative Example 1 that does not contain spherical composite resin powder and the makeup base of Comparative Example 3 that does not contain a skin-adhesive polymer have a very low effect of hiding wrinkles. Therefore, it became clear that unevenness such as wrinkles could not be sufficiently hidden only by containing either the spherical composite resin powder or the skin adhesive polymer alone.

  The cosmetics according to the present invention are less noticeable over time, have a uniform and natural finish, and also have an excellent feeling of use (smooth feeling) and makeup sustainability. For example, pores, wrinkles, etc. It can be suitably used for a makeup base for the purpose of making the unevenness of the skin surface inconspicuous.

Claims (7)

A spherical composite resin powder in which titanium oxide fine particles and cerium oxide fine particles are supported on the surface of the spherical resin powder in this order;
A cosmetic comprising at least a skin-adhesive polymer selected from the group consisting of oat grain extract, cork oak bark extract, xanthan gum cross polymer, almond extract, sorghum sap, chrysanthemum root oligosaccharide, and mixtures thereof.   The cosmetic according to claim 1, comprising 1.0 to 30% by mass of the spherical composite resin powder.   The cosmetic according to claim 1 or 2, comprising 0.01 to 20% by mass of the skin adhesive polymer.   The spherical resin powder is at least one selected from the group consisting of nylon, polyethylene, polypropylene, polymethyl methacrylate, silicone resin, silicone elastomer, cellulose, and polyurethane resin powder. Cosmetics described.   The cosmetic according to any one of claims 1 to 4, wherein a surface of the spherical composite resin powder is subjected to a hydrophobic treatment.   One or more hydrophobizing agents selected from the group consisting of a phosphoric acid ester having a hydrophobization treatment, a silicone oil, a fatty acid metal salt, an N-mono long-chain aliphatic acyl basic amino acid, and a perfluoroalkyl group; The cosmetic according to claim 5, which is a treatment used.   The cosmetic according to any one of claims 1 to 6, wherein the cosmetic is a wrinkle / pore concealing cosmetic.