JP2007045800A - Flaky particle and cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide flaky particles excellent in slipperiness, having a high transparent feeling, and therefore not causing such a problem that the particles become whitish when used, and to provide a cosmetic containing the flaky particles. <P>SOLUTION: The flaky particles have an average coefficient of friction of not more than 0.50 and a total light transmittance of not less than 85%. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to flaky particles and a cosmetic.

Flaky particles, which are plate-shaped pigments, are widely used in make-up cosmetics because of their shape, because they have good adhesion to the skin, good slipperiness, and good usability.

As such flaky particles, various types are known. Among them, particles having a small coefficient of friction have good slipperiness, so that when used, a cosmetic having an excellent feeling of use is obtained. be able to. Examples of flaky particles having a particularly small coefficient of friction include boron nitride described in Patent Document 1.

However, although boron nitride has good slipperiness, it has a disadvantage that it looks whitish when applied to the skin because of poor transparency. For this reason, in order to obtain a transparent and natural finish, it has been difficult to increase the blending amount in cosmetics. On the other hand, other flaky particles such as talc, mica, sericite, barium sulfate, and aluminum oxide have a drawback that they are inferior in slipperiness compared to boron nitride, although they are excellent in transparency. That is, flaky particles for cosmetics having both transparency and high slip properties have not been known.

Patent Document 2 describes that the surface is treated with a fatty acid metal salt in order to improve the feeling of use, adhesion, and makeup of the boron nitride particles. However, such treatment does not improve the transparency of the boron nitride particles, and flaky particles having both transparency and slipperiness cannot be obtained. It is known that the surface of other cosmetic pigments is treated with a fatty acid metal salt (for example, Patent Document 3). However, treatment with a fatty acid metal salt usually imparts pigment dispersion, adhesion, and water repellency. There was no example in which a treatment with a fatty acid metal salt was performed to improve slipperiness.

JP 62-49247 A JP 2003-40736 A JP 60-69011 A

In view of the above, the present invention provides flaky particles that are excellent in slipperiness and have a high transparency and do not cause a problem of becoming whitish when used, and a cosmetic containing the flaky particles. It is the purpose.

The present invention provides flaky particles having an average friction coefficient of 0.50 or less and a total light transmittance of 85% or more.
The flaky particles are preferably based on one kind selected from the group consisting of mica, synthetic mica, sericite, talc, barium sulfate and aluminum oxide.

The flaky particles are preferably obtained by surface-treating the base particles with 0.1 to 15% by mass of a fatty acid metal salt.
The flaky particles preferably have a ratio (0 ° / 45 °) of the reflection intensity at a light reception angle of 0 ° and the reflection intensity at a light reception angle of 45 ° measured by a three-dimensional gonioglossometer of 0.30 or more.
The present invention is also a cosmetic containing at least one of the flaky particles described above.
The present invention is described in detail below.

Since the flaky particles of the present invention are excellent in slipperiness and transparency, when used in cosmetics, excellent usability and finish can be obtained. That is, it is possible to achieve both a transparent and natural finish that has not been obtained so far and a feeling of use due to high slipperiness.

The flaky particles of the present invention more preferably have a high reflection intensity ratio (0 ° / 45 °). Thus, a pigment having a high reflection intensity ratio (0 ° / 45 °) is a pigment having a matte feeling, and a cosmetic blended with the pigment can obtain a matte finish. In this respect, the properties are greatly different from boron nitride which has a strong gloss and does not give a matte feel. Since cosmetics often require a matte finish with little shine, there is a great demand for pigments that have a matte feel.

The flaky particles of the present invention have an average friction coefficient of 0.50 or less. In the present invention, the “average friction coefficient” means a friction coefficient of 20 mm when the friction coefficient is measured using a silicone rubber friction element using a friction tester KES-SE (manufactured by Kato Tech Co., Ltd.). Is the average value. The larger the average friction coefficient, the lower the slipperiness. When the average friction coefficient exceeds 0.50, there arises a problem that the slipperiness is poor. The average friction coefficient is more preferably 0.45 or less.

The flaky particles of the present invention have transparency with a total light transmittance of 85% or more when a thin film having a concentration of 20% by mass and a thickness of 25 μm is formed. When the total light transmittance is 85% or more, the cosmetic containing the flaky particles of the present invention does not cause a problem of whitening on the skin when used. In the present invention, the total light transmittance can be measured by a method according to JIS K 7361 using a haze meter HM-150 (manufactured by Murakami Color Research Laboratory). The total light transmittance is more preferably 86.5% or more.

In the flaky particles of the present invention, the ratio (0 ° / 45 °) of the reflection intensity at a light reception angle of 0 ° and the reflection intensity at a light reception angle of 45 ° measured by a three-dimensional gonioglossmeter is 0.30 or more. preferable. That is, it is preferable that the flaky particles of the present invention have low gloss and matte feeling having such properties. If the ratio of the reflection intensity is less than 0.30, the cosmetic becomes highly glossy, which is not preferable. The light receiving angle of 0 ° and the light receiving angle of 45 ° are oriented by spreading the sample on a material such as synthetic leather with a cosmetic puff, etc., and the three-dimensional gonio-gloss meter GP-200 (Murakami Color Research Laboratory). It is the reflection intensity of the sample measured by (made).

The flaky particles in the present invention refer to particles having a tabular shape, and the ratio of the minimum length in the planar direction to the length 1 in the thickness direction of the flaky particles is preferably 5 or more on average. . By using the flaky particles of the present invention mainly for cosmetics, the effects of the present invention can be exhibited more preferably. Here, the ratio of the minimum length in the planar direction to the length 1 in the thickness direction is a value measured by the same method as the particle diameter shown below.

In the present specification, the particle diameter of the flaky particles is preferably 3 to 70 μm. If it is less than 3 μm, the slipperiness is remarkably impaired, and if it exceeds 70 μm, it becomes rough and neither is suitable for use as a cosmetic, so it is limited to the above range.
In addition, the said particle diameter averages the maximum diameter of 20 particles on the straight line drawn at random on the scanning electron micrograph of a thin piece powder, and is made into the particle diameter of the obtained particle | grains. The upper limit of the particle diameter is more preferably 50 μm.

The flaky particles are preferably based on one kind selected from the group consisting of mica, synthetic mica, sericite, talc, barium sulfate, and aluminum oxide. Since the substrate particles are excellent in transparency, particles having light transmittance within the predetermined range can be obtained.

On the other hand, boron nitride or the like is excellent in smoothness, but it is very difficult to obtain transparency even if it is treated. Therefore, it is difficult to use it suitably for the purpose of the present invention. .

The flaky particles of the present invention use one kind selected from the group consisting of the above-mentioned mica, synthetic mica, sericite, talc, barium sulfate, and aluminum oxide as the base particles, and by subjecting them to surface treatment, the average friction is obtained. It is preferable that the coefficient is reduced. That is, untreated mica, synthetic mica, sericite, talc, barium sulfate, and aluminum oxide are pigments that are excellent in transparency but not as slippery as boron nitride. By performing a necessary surface treatment on such a pigment, flaky particles having the above-described characteristics can be obtained. Since such particles have excellent slipperiness and transparency, when used in makeup cosmetics, an excellent feeling of use and a natural finish can be obtained. In addition, among the materials having a matte feeling, there are many cases where the particle surface has poor smoothness or the particle size distribution is broad, and the slipperiness tends to deteriorate. By performing a necessary surface treatment on such a material, flaky particles having the above-described characteristics can be obtained. Such particles have excellent matte feeling in addition to excellent slipperiness and transparency, so that excellent use feeling and a natural and matte finish can be obtained.

One kind selected from the group consisting of mica, synthetic mica, sericite, talc, barium sulfate, and aluminum oxide used as the base particles is not particularly limited, and is of a grade that can be used normally as a cosmetic raw material. Can be used. Examples of commercially available products include synthetic mica PDM-10S (manufactured by Topy Industries), sericite FSE (manufactured by Sanshin Mining Co., Ltd.), sericite SL (manufactured by Horie Chemical Co., Ltd.), talc Micro Ace P-2 (Nihon Talc And barium sulfate / H (made by Sakai Chemical Industry Co., Ltd.).

The surface treatment is not particularly limited, but treatment with a fatty acid metal salt is preferable. The fatty acid metal salt is not particularly limited, but from the viewpoint of improving the touch and the storage stability when it is used as a cosmetic, it is preferable that the alkyl group has a larger number of carbon atoms, more preferably those having 12 or more carbon atoms. . As the fatty acid part of the fatty acid metal salt, for example, saturated fatty acids such as lauric acid, myristic acid, palmitic acid and stearic acid, unsaturated fatty acids such as oleic acid, branched fatty acids such as isostearic acid and the like are preferably used. Can do. Furthermore, naturally-derived fatty acids such as palm oil fatty acid, beef tallow fatty acid, palm oil fatty acid, palm kernel oil, and papas oil may be used. One of the above fatty acids may be used alone, or two or more thereof may be mixed and used. Laurate, palmitate, and stearate are more preferable, and palmitate and stearate are most preferable. The metal of the fatty acid metal salt is not particularly limited, and is preferably a metal salt of a divalent or trivalent metal. Specific examples include calcium salts, magnesium salts, zinc salts, aluminum salts and the like. Of these, calcium salts, magnesium salts, and aluminum salts are preferable.

The treatment of the base particles with the fatty acid metal salt is not particularly limited, but for example, the base particles are suspended in water, and an aqueous solution of a water-soluble metal salt and a basic aqueous solution are added to adjust the basic, By dropping an aqueous solution of a water-soluble fatty acid salt, the method can be performed by a method of depositing a fatty acid metal salt film on the surface of the substrate particles.

The flaky particles are preferably treated with 0.1 to 15% by mass of a fatty acid metal salt in the treated particles. If the amount is less than 0.1% by mass, the improvement of the slipping property may be insufficient, and if it exceeds 15% by mass, the slipping property tends to deteriorate.

The present invention is also a cosmetic containing one or more of the flaky particles described above. The cosmetics of the present invention are particularly preferably makeup cosmetics, specifically, base makeup cosmetics such as foundations, face powders, and makeup bases, point makeups such as lipsticks, eye shadows, and cheek colors. Cosmetics can be mentioned.

The cosmetic of the present invention contains, in addition to the flaky particles, flaky particles whose average friction coefficient and total light transmittance are not within the above ranges, various colored pigments and extender pigments in other shapes. May be.

The cosmetic of the present invention may be used in combination with any color pigment, extender pigment, aqueous component, and oil component that can be used in the cosmetic field.

The color pigment is not particularly limited, and includes, for example, inorganic white pigments (for example, titanium dioxide, zinc oxide, etc.); inorganic red pigments (for example, iron oxide (Bengara), iron titanate, etc.); inorganic brown pigments ( For example, γ-iron oxide, etc.); inorganic yellow pigments (eg, yellow iron oxide, ocher, etc.); inorganic black pigments (eg, black iron oxide, low-order titanium oxide, etc.); inorganic purple pigments (eg, mango) Violet, cobalt violet, etc.); inorganic green pigments (eg, chromium oxide, chromium hydroxide, cobalt titanate, etc.); inorganic blue pigments (eg, ultramarine blue, bitumen, etc.); pearl pigments (eg, titanium oxide coated mica, Titanium oxide coated bismuth oxychloride, titanium oxide coated talc, colored titanium oxide coated mica, bismuth oxychloride, fish scale foil, etc.); metal powder pigment For example, aluminum powder, copper powder, etc.); organic pigments such as zirconium, barium or aluminum lake (for example, red 201, red 202, red 204, red 205, red 220, red 226, red 228) Organic pigments such as red 405, orange 203, orange 204, yellow 205, yellow 401, and blue 404, red 3, red 104, red 106, red 227, red 230, Red No. 401, Red No. 505, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No. 203, Green No. 3 and Blue No. 1); natural pigments (eg, chlorophyll, β-carotene, etc.) Etc. The extender pigment is not particularly limited, and examples thereof include mica, synthetic mica, sericite, talc, kaolin, calcium carbonate, magnesium carbonate, barium sulfate, and aluminum oxide.

The aqueous component and the oil component are not particularly limited, and examples thereof include oils, surfactants, humectants, higher alcohols, sequestering agents, natural and synthetic polymers, water-soluble and oil-soluble polymers, ultraviolet absorbers, Various extracts, inorganic and organic pigments, inorganic and organic clay minerals, inorganic and organic pigments treated with metal soaps or silicones, organic dyes and other colorants, preservatives, antioxidants, pigments, thickeners, pH You may contain components, such as a regulator, a fragrance | flavor, a cooling agent, an antiperspirant, a disinfectant, and a skin activator. Specifically, it is possible to produce any desired cosmetic by a conventional method by arbitrarily blending one or more of the blending ingredients listed below. The compounding amounts of these compounding components are not particularly limited as long as the effects of the present invention are not impaired.

The oil content is not particularly limited. For example, avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, sasanqua oil, castor Oil, flaxseed oil, safflower oil, cottonseed oil, eno oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, cinnagari oil, Japanese kiri oil, jojoba oil, germ oil, triglycerin, glycerin trioctanoate, Glycerin triisopalmitate, cocoa butter, coconut oil, horse fat, hydrogenated coconut oil, palm oil, beef tallow, sheep fat, hydrogenated beef tallow, palm kernel oil, pork tallow, beef bone oil, owl kernel oil, hydrogenated oil, cow leg Fat, Owl, Hardened castor oil, Beeswax, Candelilla wax, Cotton wax, Carnauba wax, Bayberry wax, Ibotaro, Whale wax, Montan wax, Nukarou, Norin, Kapok wax, Lanolin acetate, Liquid lanolin, Sugar cane wax, Lanolin fatty acid isopropyl, Hexyl laurate, Reduced lanolin, Jojo wax, Hard lanolin, Shellac wax, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, lanolin fatty acid polyethylene glycol POE hydrogenated lanolin alcohol ether, liquid paraffin, ozokerite, pristane, paraffin, ceresin, squalene, petrolatum, microcrystalline wax and the like.

The lipophilic nonionic surfactant is not particularly limited. For example, sorbitan monooleate, sorbitan monoisostearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquioleate, sorbitan trioleate Sorbitan fatty acid esters such as diglycerol sorbitan tetra-2-ethylhexylate, diglycerol sorbitan tetra-2-ethylhexylate, mono-cotton oil fatty acid glycerin, glyceryl monoerucate, glyceryl sesquioleate, glyceryl monostearate, α, α ' -Glycerol polyglycerin fatty acids such as glyceryl oleate, glyceryl monooleate, glyceryl monostearate, and propylene glycol such as propylene glycol monostearate Examples include recall fatty acid esters, hardened castor oil derivatives, and glycerin alkyl ethers.

The hydrophilic nonionic surfactant is not particularly limited. For example, POE sorbitan fatty acid esters such as POE sorbitan monooleate, POE-sorbitan monostearate, POE-sorbitan monooleate, POE-sorbitan tetraoleate, POE sorbite fatty acid esters such as POE-sorbite monolaurate, POE-sorbite monooleate, POE-sorbite pentaoleate, POE-sorbite monostearate, POE-glycerol monostearate, POE-glycerol monoisostearate, POE glycerol fatty acid esters such as POE-glycerin triisostearate, POE monooleate, POE distearate, POE monodiolate, PO such as ethylene glycol stearate Fatty acid esters, POE lauryl ether, POE oleyl ether, POE stearyl ether, POE behenyl ether, POE2-octyldodecyl ether, POE alkyl ethers such as POE cholestanol ether, POE octylphenyl ether, POE nonylphenyl ether, POE dinonyl POE alkyl phenyl ethers such as phenyl ether, pluronic types such as brulonic, POE / POP cetyl ether, POE / POP2-decyltetradecyl ether, POE / POP monobutyl ether, POE / POP hydrogenated lanolin, POE / POP glycerin ether POE / POP alkyl ethers such as Tetronic, Tetra POE / Tetra POP ethylenediamine condensates such as Tetronic, POE Castor POE hydrogenated castor oil, POE hydrogenated castor oil monoisostearate, POE hydrogenated castor oil triisostearate, POE hydrogenated castor oil monopyroglutamic acid monoisostearic acid diester, POE hydrogenated castor oil maleic acid, etc. Derivatives, POE beeswax / lanolin derivatives such as POE sorbite beeswax, alkanolamides such as coconut oil fatty acid diethanolamide, lauric acid monoethanolamide, fatty acid isopropanolamide, POE propylene glycol fatty acid ester, POE alkylamine, POE fatty acid amide, sucrose fatty acid Examples thereof include esters, POE nonylphenyl formaldehyde condensates, alkylethoxydimethylamine oxide, trioleyl phosphoric acid and the like.

Examples of other surfactants include anionic surfactants such as fatty acid soaps, higher alkyl sulfates, POE lauryl sulfate triethanolamine, alkyl ether sulfates, alkyltrimethylammonium salts, alkylpyridinium salts, alkyl quaternary salts. Stabilizes cationic surfactants such as ammonium salts, alkyldimethylbenzylammonium salts, POE alkylamines, alkylamine salts, polyamine fatty acid derivatives, and amphoteric surfactants such as imidazoline-based amphoteric surfactants and betaine-based surfactants. And you may mix | blend in the range which does not have a problem in skin irritation.

The moisturizing agent is not particularly limited, and examples thereof include xylitol, sorbitol, maltitol, chondroitin sulfate, hyaluronic acid, mucoitin sulfate, caronic acid, atelocollagen, cholesteryl-12-hydroxystearate, sodium lactate, bile salt, dl- Examples thereof include pyrrolidone carboxylate, short-chain soluble collagen, diglycerin (EO) PO adduct, Isaiyobara extract, Achillea millefolium extract, and Merirot extract.

The higher alcohol is not particularly limited, and examples thereof include linear alcohols such as lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, cetostearyl alcohol, monostearyl glycerin ether (batyl alcohol), 2-decyl. Examples thereof include branched chain alcohols such as tetradecinol, lanolin alcohol, cholesterol, phytosterol, hexyldodecanol, isostearyl alcohol, octyldodecanol, and the like.

The sequestering agent is not particularly limited. For example, 1-hydroxyethane-1,1-diphosphonic acid, 1-hydroxyethane-1,1-diphosphonic acid tetrasodium salt, sodium citrate, sodium polyphosphate, metaphosphoric acid Examples thereof include sodium, gluconic acid, phosphoric acid, citric acid, ascorbic acid, succinic acid, edetic acid and the like.

The natural water-soluble polymer is not particularly limited. For example, arabia gum, tragacanth gum, galactan, guar gum, carob gum, caraya gum, carrageenan, pectin, agar, quince seed (malmello), alge colloid (guckweed extract), starch (rice, rice, Corn, potato, wheat), plant polymers such as glycyrrhizic acid, microbial polymers such as xanthan gum, dextran, succinoglucan and pullulan, and animal polymers such as collagen, casein, albumin and gelatin. .

The semi-synthetic water-soluble polymer is not particularly limited. For example, starch-based polymers such as carboxymethyl starch and methylhydroxypropyl starch, methylcellulose, nitrocellulose, ethylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, sodium cellulose sulfate, Examples thereof include cellulose polymers such as hydroxypropylcellulose, sodium carboxymethylcellulose (CMC), crystalline cellulose, and cellulose powder, and alginic acid polymers such as sodium alginate and propylene glycol alginate.

The synthetic water-soluble polymer is not particularly limited, and examples thereof include vinyl polymers such as polyvinyl alcohol, polyvinyl methyl ether, and polyvinyl pyrrolidone, and polyoxyethylene polymers such as polyethylene glycol 20,000, 40,000, and 60,000. Examples thereof include polymers, polyoxyethylene polyoxypropylene copolymer copolymer polymers, acrylic polymers such as sodium polyacrylate, polyethyl acrylate and polyacrylamide, polyethyleneimine, and cationic polymers.

The inorganic water-soluble polymer is not particularly limited, and examples thereof include bentonite, silicate A1Mg (beegum), laponite, hectorite, and silicic anhydride.

The ultraviolet absorber is not particularly limited. For example, paraaminobenzoic acid (hereinafter abbreviated as PABA), PABA monoglycerin ester, N, N-dipropoxy PABA ethyl ester, N, N-diethoxy PABA ethyl ester, N, N-dimethyl Benzoic acid UV absorbers such as PABA ethyl ester and N, N-dimethyl PABA butyl ester; Anthranilic acid UV absorbers such as homomenthyl-N-acetylanthranilate; Amil salicylate, menthyl salicylate, homomenthyl salicylate, octyl salicylate , Salicylic acid ultraviolet absorbers such as phenyl salicylate, benzyl salicylate, p-isopropanol phenyl salicylate; octylcinnamate, ethyl-4-isopropylcinnamate, methyl-2,5- Isopropyl cinnamate, ethyl-2,4-diisopropyl cinnamate, methyl-2,4-diisopropyl cinnamate, propyl-p-methoxycinnamate, isopropyl-p-methoxycinnamate, isoamyl-p-methoxycinnamate, octyl- p-methoxycinnamate (2-ethylhexyl-p-methoxycinnamate), 2-ethoxyethyl-p-methoxycinnamate, cyclohexyl-p-methoxycinnamate, ethyl-α-cyano-β-phenylcinnamate, 2- Cinnamic acid-based UV absorbers such as ethylhexyl-α-cyano-β-phenylcinnamate, glyceryl mono-2-ethylhexanoyl-diparamethoxycinnamate; 2,4-dihydroxybenzophenone, 2,2′-dihydroxy-4 -Met Xibenzophenone, 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-octate Benzophenone ultraviolet absorbers such as xylbenzophenone and 4-hydroxy-3-carboxybenzophenone; 3- (4′-methylbenzylidene) -d, l-camphor, 3-benzylidene-d, l-camphor, urocanic acid, urocanic acid Ethyl ester, 2- Enyl-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, etc. Can be mentioned.

There are no particular limitations on the various extracts, for example, Dokudami extract, Oat extract, Merirot extract, Odorikosou extract, Licorice extract, Peonies extract, Soap extract, Loofah extract, Kina extract, Yukinoshita extract, Clara extract, Kouhone extract, Fennel Extract, Primrose Extract, Rose Extract, Giant Extract, Lemon Extract, Shikon Extract, Aloe Extract, Shobu Root Extract, Eucalyptus Extract, Horsetail Extract, Sage Extract, Thyme Extract, Tea Extract, Seaweed Extract, Cucumber Extract, Clove Extract, Raspberry Extract, Melissa Extract , Carrot extract, horse chestnut extract, peach extract, peach leaf extract, mulberry extract, cornflower extract, hamamelis extract, placenta extract, thymus extract, silk extract, licorice Mention may be made of the kiss and the like.

Other components are not particularly limited, and examples thereof include vitamin A oil, retinol, retinol palmitate, inosit, pyridoxine hydrochloride, benzyl nicotinate, nicotinamide, nicotinic acid DL-α-tocopherol, magnesium ascorbate phosphate, 2 Vitamins such as -O-α-D-glucopyranosyl-L-ascorbic acid, vitamin D2 (ergocaciferol), DL-α-tocopherol, DL-α-tocopherol acetate, pantothenic acid, biotin; estradiol, ethinylestradiol, etc. Hormones; amino acids such as arginine, aspartic acid, cystine, cysteine, methionine, serine, leucine, and tryptophan; anti-inflammatory agents such as allantoin and azulene; whitening agents such as arbutin; and zinc oxide and tannic acid Agent: Inorganic pigments such as titanium dioxide, bengara, iron titanate, γ-iron oxide, ocher, yellow iron oxide, black iron oxide, carbon black; lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, isostearic acid Fatty acids such as sodium salts, potassium salts, calcium salts, magnesium salts, strontium salts, barium salts; refreshing agents such as L-menthol and camphor; sulfur, lysozyme chloride, pyridoxine chloride; it can.

Since the flaky particles of the present invention contain flaky particles having an average friction coefficient of 0.5 or less and a total light transmittance of 85% or more as a main component, they have excellent slipperiness and transparency. For this reason, when it mix | blends with cosmetics, it has the property which was excellent in the usability | use_condition and the finished external appearance. Furthermore, when the ratio of the reflection intensity (0 ° / 45 °) is 0.30 or more, a cosmetic having an excellent mat feeling can be obtained. Thus, a cosmetic material having an unprecedented feeling of use and a finished appearance is provided.

According to the present invention, flaky particles having excellent slipperiness, transparency, and matting properties could be obtained. By using the flaky particles of the present invention, it is possible to obtain a cosmetic material having excellent usability and aesthetics.

Calculation of average friction coefficient <br/> A double-sided tape with a width of 25 mm is pasted on a slide glass, flaky particles are placed on it, spread on a cosmetic puff, and made of silicone rubber with a friction tester KES-SE (manufactured by Kato Tech). The friction coefficient was measured using a friction element, and the average friction coefficient was calculated from the average value of the friction coefficient (μ) between 20 mm.
The average friction coefficient of plate-like barium sulfate · H (particle diameter: 5 to 10 μm, manufactured by Sakai Chemical Industry Co., Ltd.) used as the base particles was 0.56.
Measurement of total light transmittance 2 g of flaky particles and 8 g of liquid paraffin smoil P-80 (manufactured by Matsumura Oil Research Co., Ltd.) were kneaded with a Hoover type Mahler, and a thin film having a thickness of 25 μm was formed with an applicator. The total light transmittance was measured using a haze meter HM-150 (manufactured by Murakami Color Research Laboratory). The results are shown in Table 1.

Mica Y-3000, synthetic mica PDM-10S, sericite FSE, plate-like barium sulfate / H, and aluminum oxide FAO-H satisfy the total light transmittance regulation (85% or more) of the present invention.

Measurement of matte property The material is placed on supplere (polyurethane coated synthetic leather with protein powder) (made by Idemitsu Techno Fine Co., Ltd.) and spread evenly with a cosmetic sponge. The reflection intensity was measured using Murakami Color Research Laboratory. The ratio of light receiving angle 0 ° intensity / light receiving angle 45 ° was calculated. It shows that a mat feeling is so strong that the said ratio is large. The results are shown in Table 2.

It can be seen that sericite FSE and plate-like barium sulfate · H have a strong matte feeling compared to boron nitride.

Production of flaky particles
Example 1
An aqueous solution in which 99.50 g of plate-like barium sulfate H (manufactured by Sakai Chemical Industry Co., Ltd.) is suspended in 1 L of ion-exchanged water and 0.53 g of aluminum chloride hexahydrate is dissolved in 50 mL of ion-exchanged water and a 1% by mass NaOH aqueous solution Were added simultaneously over 30 minutes to a pH of 8 ± 0.5. After the temperature was raised to 70 ° C., a solution (70 ° C.) in which 0.49 g of sodium laurate was dissolved in 50 mL of ion-exchanged water was added dropwise over 10 minutes. After completion of dropping, the mixture was aged for 30 minutes, filtered, washed with water (70 ° C., until the washing conductivity became 0.1 mS / cm or less) and dried to obtain flaky particles (average coefficient of friction 0.42). In addition, the processing amount by a fatty-acid metal salt is 0.5 mass%.

Example 2
Plate-like barium sulfate / H (manufactured by Sakai Chemical Industry Co., Ltd.) 97.00 g suspended in 1 L of ion-exchanged water, aluminum chloride hexahydrate 3.20 g dissolved in ion-exchanged water 50 mL, and 5% by weight NaOH aqueous solution Were added simultaneously over 30 minutes to a pH of 8 ± 0.5. After heating up to 70 degreeC, the liquid (70 degreeC) which melt | dissolved 2.95 g of sodium laurate in 300 mL of ion-exchange water was dripped over 10 minutes. After completion of the dropwise addition, the mixture was aged for 30 minutes, filtered, washed with water (70 ° C., until the washing liquid conductivity was 0.1 mS / cm or less) and dried to obtain flaky particles (average coefficient of friction 0.45). In addition, the processing amount by a fatty-acid metal salt is 3.0 mass%.

Example 3
An aqueous solution in which 99.00 g of plate-like barium sulfate / H (manufactured by Sakai Chemical Industry Co., Ltd.) is suspended in 1 L of ion-exchanged water and 0.50 g of calcium chloride dihydrate is dissolved in 50 mL of ion-exchanged water and a 1% by mass NaOH aqueous solution. Were added simultaneously over 30 minutes to a pH of 11 ± 0.5. After the temperature was raised to 80 ° C., a solution (80 ° C.) obtained by dissolving 0.94 g of sodium palmitate in 100 mL of ion-exchanged water was added dropwise over 10 minutes. After completion of the dropwise addition, the mixture was aged for 30 minutes, filtered, washed with water (80 ° C., until the washing liquid conductivity was 0.1 mS / cm or less) and dried to obtain flaky particles (average coefficient of friction 0.39). In addition, the processing amount by a fatty-acid metal salt is 1.0 mass%.

Example 4
After adding 87.00 g of plate-like barium sulfate H (manufactured by Sakai Chemical Industry Co., Ltd.) in 1 L of ion-exchanged water and adding an aqueous solution prepared by dissolving 8.58 g of magnesium chloride hexahydrate in 50 mL of ion-exchanged water, 3% by mass Was added dropwise over 30 minutes so that the pH was 11 ± 0.5. After the temperature was raised to 70 ° C., a solution (70 ° C.) in which 8.58 g of sodium stearate was dissolved in 150 mL of ion-exchanged water was added dropwise over 30 minutes. After completion of dropping, the mixture was aged for 30 minutes, filtered, washed with water (70 ° C., until the washing liquid conductivity was 0.1 mS / cm or less), and dried to obtain flaky particles (average coefficient of friction 0.44). In addition, the processing amount by a fatty-acid metal salt is 13.0 mass%.

Comparative Example 1
99.96 g of plate-like barium sulfate H (manufactured by Sakai Chemical Industry Co., Ltd.) was suspended in 1 L of ion-exchanged water, and an aqueous solution prepared by dissolving 0.04 g of aluminum chloride hexahydrate in 50 mL of ion-exchanged water and 0.1% by mass An aqueous NaOH solution was added simultaneously over 30 minutes so that the pH was 8 ± 0.5. After heating up to 70 degreeC, the liquid (70 degreeC) which melt | dissolved sodium laurate 0.04g in ion-exchange water 50mL was dripped over 10 minutes. After completion of dropping, the mixture was aged for 30 minutes, filtered, washed with water (70 ° C., until the washing conductivity became 0.1 mS / cm or less) and dried to obtain flaky particles (average coefficient of friction 0.55). In addition, the processing amount by a fatty acid metal salt is 0.04 mass%.

Comparative Example 2
An aqueous solution prepared by suspending 83.00 g of plate-like barium sulfate / H (manufactured by Sakai Chemical Industry Co., Ltd.) in 700 mL of ion-exchanged water and dissolving 18.32 g of aluminum chloride hexahydrate in 50 mL of ion-exchanged water and a 3% by mass NaOH aqueous solution Were added simultaneously over 30 minutes to a pH of 8 ± 0.5. After the temperature was raised to 70 ° C., a solution (70 ° C.) in which 16.89 g of sodium laurate was dissolved in 500 mL of ion-exchanged water was added dropwise over 30 minutes. After completion of the dropwise addition, the mixture was aged for 30 minutes, filtered, washed with water (70 ° C., until the washing liquid conductivity was 0.1 mS / cm or less) and dried to obtain flaky particles (average coefficient of friction 0.60). In addition, the processing amount with a fatty-acid metal salt is 17.0 mass%.

Manufacture of cosmetics Components (1) to (7) were mixed and ground for the formulations shown in Table 3 below, transferred to a high-speed blender, and components (8) to (10) were further mixed and dissolved at 80C. Things were added and mixed uniformly. The component (11) was added to the mixture and mixed, and then ground again and passed through a sieve. This was compression molded into a metal pan to produce cosmetics (Examples 5 to 8, Comparative Examples 3 to 5).

Evaluation of cosmetics 15 panelists evaluated the cosmetics obtained. The results are shown in Table 3 below. Evaluation was performed according to the following criteria. ◎ Very good, ○ Good, △ Normal, × Bad

From Table 3, it became clear that cosmetics excellent in slipperiness, mat feeling and transparency can be obtained.

According to the present invention, flaky particles having excellent slipperiness, transparency, and matting properties could be obtained. By using the flaky particles of the present invention, it is possible to obtain a cosmetic material having excellent usability and aesthetics.

Claims (5)

A flaky particle having an average friction coefficient of 0.50 or less and a total light transmittance of 85% or more. The flaky particle according to claim 1, wherein the flaky particle comprises, as a base particle, one kind selected from the group consisting of mica, synthetic mica, sericite, talc, barium sulfate, and aluminum oxide. The flaky particle according to claim 1 or 2, wherein the flaky particle is obtained by surface-treating the base particle with 0.1 to 15% by mass of a fatty acid metal salt. 4. A flake according to claim 1, 2 or 3, wherein the ratio (0 ° / 45 °) of the reflection intensity at a light reception angle of 0 ° and the reflection intensity at a light reception angle of 45 ° measured by a three-dimensional gonioglossometer is 0.30 or more. Particles. A cosmetic comprising at least one of the flaky particles according to claim 1, 2, 3, or 4.