JP3432933B2 - Coated powder and cosmetic containing the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel coated powder, and more specifically, a coating which gives good transparency and bare skin feeling, and has an effect of making pores, wrinkles and the like present on the skin less visible. The present invention relates to powder and cosmetics containing the powder.

[0002]

BACKGROUND OF THE INVENTION As cosmetics containing powder, makeup cosmetics such as foundation, white powder, blusher, eye shadow, lipstick, eyeliner, eyebrow, etc. and body powder, baby powder, etc. Body cosmetics are sold on the market.

Conventionally, the following two methods have been used as methods for concealing problems related to the form of skin wrinkles, pores, etc. due to cosmetics. One of them is a pigment with a high hiding power, that is, a pigment with a large refractive index and a pigment with a high coloring power, such as titanium dioxide, red iron oxide, yellow iron oxide, and black iron oxide.
Compounding organic pigments etc. as coloring pigments to enhance coverage,
This is a method of concealing troubles related to the form of pores, wrinkles, etc. existing on the skin.

[0004] However, the above-mentioned cosmetics containing a large amount of a pigment having a high hiding power, that is, a pigment having a large refractive index and a pigment having a high coloring power, are effective against color tone problems such as stains and freckles. However, it has little effect on troubles related to the form such as pores and wrinkles, and conversely makes the problems related to the form noticeable. Furthermore, there is a problem that the finished feeling also gives a thick makeup feeling, becomes opaque, and the natural feeling of the skin is lost.

As another method for concealing morphological problems, cosmetics containing various diffuse reflection type powders are known (Japanese Patent Laid-Open No. 228406/1985). However, although these diffuse reflection type powders have a slight effect on troubles related to morphology such as pores and wrinkles, they have a whitish and unnatural finish and have a powdery finish. Have a point.

[0006]

Therefore, as a result of intensive studies to solve the above problems, the inventors of the present invention have found that a specific barium sulfate powder is surface-treated with aluminum oxide or aluminum hydroxide. Using a water-repellent coated powder, it is possible to obtain a cosmetic product that has good transparency and bare skin feel, and is also effective in concealing problems related to the morphology such as pores and wrinkles present on the skin. Heading out, the present invention has been completed.

That is, the present invention has a plate-like structure, has an aspect ratio of 5 to 100, and has a ratio of the square of the perimeter of the plate-like surface to the area of the orthogonal projection surface of the plate-like surface. 20:
Barium sulfate powder having a ratio of 1 to 150: 1 is a coating powder obtained by surface-treating aluminum oxide or aluminum hydroxide, and dimethylpolysiloxane (1
Coating having a concentration of 20% by weight and a scattering transmittance of 65% or more and a total transmittance of 85% or more when a thin film having a thickness of 15 μm is formed using Powder (hereinafter sometimes referred to as "coated powder 1")
Is provided. The present invention also provides the coated powder 1
Of water-repellent coated powder (hereinafter referred to as "Coated powder 2")
That is the case). Furthermore, the present invention provides a cosmetic containing the coated powder 1 or 2.

The barium sulfate powder used in the present invention has a plate-like structure and has an aspect ratio of 5 to 100, and the square of the perimeter of the plate-like surface and the area of the orthographic projection surface of the plate-like surface. Ratio of 20: 1 to 150: 1. Further, the shape is preferably a butterfly shape having one or two mirror image planes perpendicular to the plate-like surface and having a concave portion at the edge. In addition, when this barium sulfate powder was subjected to X-ray diffraction, the diffraction peak intensity ratio of the (020) and (200) planes of the crystal became very large, resulting in (020) / (20
0) = 1.5 to 100 is particularly preferable.

The barium sulfate powder is produced by reacting a barium salt solution with a sulfate solution. The barium salt used here is soluble in a solvent such as water or alcohol, and examples thereof include barium chloride, barium nitrate, barium acetate, and barium hydroxide.
The purity of the metal ions other than barium is preferably 1000 ppm or less so that the transparency does not hinder the transparency.
Further, the sulfate means water, a sulfate soluble in a solvent such as alcohol and sulfuric acid, and examples of the sulfate include sodium sulfate, ammonium sulfate and the like, but like the barium salt, a metal ion from the viewpoint of transparency. It is preferable to use a sulfate solution containing no.

The barium ion concentration of the barium salt solution and the sulfate ion concentration of the sulfate solution must each be 0.001 to 0.05 mole / l before the reaction. If the concentration is less than 0.001 mole / l, the plate-like structure of the crystal collapses and becomes closer to a columnar shape, resulting in poor usability and a low yield as barium sulfate, which is industrially undesirable. On the other hand, if it exceeds 0.05 mole / l, the crystal plate-like structure collapses to form fine particles, resulting in poor usability and a large light scattering effect, which is not preferable because of poor transparency. In the reaction, the barium salt solution and the sulfate solution are mixed at a molar ratio of 1:10 to 5: 1. Further, during the reaction, the pH is adjusted to 1.0 to 5.0, if necessary, with hydrochloric acid, sulfuric acid, and nitric acid, and the reaction temperature is 50 to 100 ° C, preferably 60 to 95 ° C.
If the pH and reaction temperature deviate from this range, the crystal plate-like structure will collapse, and the usability and transparency will deteriorate.

The coated powder obtained by surface-treating the barium sulfate powder obtained as described above with aluminum oxide or aluminum hydroxide has a powder concentration of 20% by weight and a thickness of 15 μm.
When the scattering transmittance when forming a thin film of m is 65% or more,
Moreover, it has an optical property that the total transmittance is 85% or more. A powder having such optical properties has a high total transmittance and thus a small amount of reflected / scattered light. The transmitted light is scattered and has the effect of making the base blurred and making it difficult to see. Such an effect does not exist in conventional pigments, and will be referred to as “sharpness suppressing effect” hereinafter.
Say.

As a method of treating the surface of such barium sulfate powder with aluminum hydroxide or aluminum oxide (alumina), barium sulfate is treated with one or more of aluminum sulfate, sodium aluminate, aluminum chloride and the like. Select one and add it as an aqueous solution, and then add one or more kinds of acidic or basic precipitating agent solutions to hydrolyze the metal salt to precipitate aluminum hydroxide on the barium sulfate surface, and to remove the salt produced by neutralization. Surface treatment can be performed by removing with water and drying. In addition, the surface can be treated with aluminum oxide (alumina) by firing alumina hydroxide deposited on the surface of barium sulfate at 500 to 1000 ° C or lower.

The amount of alumina or aluminum hydroxide treated with respect to the barium sulfate powder is preferably 0.05 to 20% by weight, more preferably 0.5 to 10% by weight, based on the barium sulfate powder. Within this range, the sharpness suppressing effect is further improved and the feel is also good.

The surface of the coated powder 1 surface-treated with alumina or aluminum hydroxide as described above can be further water-repellent treated by using a water-repellent treatment agent which is usually used. Examples of the water repellent agent used here include silicone oil, fatty acid metal salt, alkylphosphoric acid, alkali metal salt or amine salt of alkylphosphoric acid, N-mono long-chain (8 to 22 carbon atoms) aliphatic acyl basic Examples include amino acids.

The silicone oil is not particularly limited as long as it is used in ordinary cosmetics and the like. For example, a silicone oil containing a Si-H group such as methyl hydrogen polysiloxane, a silicone oil containing a Si-OH group, etc. , Cyclic dimethyl polysiloxane, dimethyl silicone, and the like. Specifically, dimethyl polysiloxane,
Cyclic dimethyl polysiloxane, methylphenyl polysiloxane, methyl hydrogen polysiloxane, cyclic methyl hydrogen polysiloxane, dimethyl siloxane / methyl (polyoxyethylene) siloxane copolymer, dimethyl siloxane / methyl (polyoxypropylene) siloxane copolymer , Myristyl silicone, dimethyl siloxane / methyl stearoxy siloxane copolymer, dimethyl siloxane / methyl cetyloxy siloxane copolymer, methyl polysiloxane emulsion, silicone resin, silicone grease, polyether modified silicone, methyl styryl modified silicone, alkyl modified silicone , Higher fatty acid ester modified silicone, higher alkoxy modified silicone, phenol modified silicone, higher fatty acid modified Recone, and the like.

The fatty acid metal salt particularly has 12 to 12 carbon atoms.
Preferred are 18 salts, and salts thereof include, for example, salts of calcium, magnesium, zinc, aluminum and the like, with aluminum salts being particularly preferred. Therefore, preferred fatty acid metal salts include, but are not limited to, aluminum monostearate, aluminum disterate, aluminum monooleate, aluminum monopalmitate, and aluminum monolaurate.

Examples of the alkyl phosphoric acid or its alkali metal salt or amine salt include those represented by the general formula (1) or (2). For example, dicetyl phosphoric acid, monolauryl phosphoric acid, sodium monolauryl phosphoric acid. salt,
Examples thereof include potassium salt or amine salt, sodium salt of dicetyl phosphate, potassium salt or amine salt.

[0018]

[Chemical 1]

The above general formula (1) and the above general formula (2)
Among them, the hydrocarbon group represented by R ^{1 to} R ³ has 1 to 4 carbon atoms.
The number of carbon atoms is 5, but those having 8 or more carbon atoms are preferable. When the number of carbon atoms is less than 8, the metal salt of alkylphosphoric acid exhibits tackiness, and lubricity and spreadability may be reduced. Examples of such a hydrocarbon group include octyl, nonyl, decyl, dodecyl, undecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl, heneicosyl, docosyl, tricosyl, tetracosyl, pentacosyl, hexacosyl, heptacosyl, octacosyl. ,
Nonacosyl, triacontyl, hentriacontyl, dotriacontyl, octenyl, nonenyl, decenyl, dodecenyl, undecenyl, tridecenyl, tetradecenyl, pentadecenyl, hexadecenyl, heptadecenyl, octadecenyl, nonadecenyl, cocenyl, tetracenyl, cocenyl, docenyl, tricocenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, codonyl Octacosenyl, nonacocenyl, triacontenyl, hentriacontenyl, dotriacontenyl, octadienyl, nonadienyl, decadienyl, dodecadienyl, undecadienyl, tridecadienyl, tetradecadienyl, pentadecadienyl, hexadecadienyl, heptadecadienyl, Octadecadienyl, nonadecadienyl, eicosa Enyl, heneicosadienyl, docosadienyl, tricosadienyl, tetracosadienyl, pentacosadienyl, hexacosadienyl, heptacosadienyl, octacosadienyl, nonacosadienyl, triacontadienyl, gentriacontadienyl, do Triacontadienyl, 2-hexyldecyl, 2
-Octyl undecyl, 2-decyl tetradecyl, 2-
Undecyl hexadecyl, 2-tetradecyl octadecyl group, etc. are mentioned. Further, in the general formula (1) and the general formula (2), examples of the alkali metal represented by X ^{1 to} X ³ include potassium and sodium, and X ^{1 to} X
^{As the} amine represented by ³ , monoethanolamine,
Examples include diethanolamine, triethanolamine, triisopropanolamine, morpholine and arginine.

Examples of the basic amino acid that constitutes the N-mono long-chain (C8-22) aliphatic acyl basic amino acid include α, γ-diaminobutyric acid, ornithine, lysine, arginine, histidine and the like. These may be optically active or racemic. The long-chain aliphatic acyl group is a saturated or unsaturated straight-chain or branched-chain aliphatic acyl group having 8 to 22 carbon atoms, which may have a single chain length or a mixed chain length. Good. Specifically, 2-ethylhexanoyl, capryloyl, caproyl, lauroyl, myristoyl, palmitoyl, stearoyl, isostearoyl, oleoyl, behenoyl,
Examples include cocoyl, tallow fatty acid acyl, and hardened tallow fatty acid acyl. The binding site of the long-chain acyl group to the basic amino acid is the amino group at the α-position or the amino group at the ω-position, but in arginine and histidine, it is limited to the amino group at the α-position. Specific examples include Nε-2-ethylhexanoyl lysine, Nε-lauroyl lysine, Nε-cocoyl lysine, Nε-palmitoyl lysine, Nε-isostearoyl lysine, Nε-hardened tallow fatty acid acyl lysine, Nα-capryloyl lysine, Nα-. Lauroyl lysine, Nα-myristoyl lysine, Nα-oleoyl lysine, Nα-behenoyl lysine, Nδ-cocoyl ornithine, Nδ-stearoyl ornithine, Nδ-beef tallow fatty acyl ornithine, Nα-ethylhexanoyl ornithine, Nα-lauroyl ornithine, Nα-iso. Stearoylornithine, Nγ-palmitoyl-α, γ-diaminobutyric acid, Nα-beef tallow fatty acid acyl-α, γ-diaminobutyric acid, Nα-caproylarginine, Nα-lauroylarginine, Nα-palmitoylarginine, Nα-curing Fat fatty acyl arginine, N @ .alpha cocoyl histidine, N @ .alpha isostearoyl but histidine and the like, but are not limited to these examples.

As a method for treating the coated powder 1 with silicone oil, the coated powder 1 is dispersed in one or two or more kinds of the above-mentioned silicone oil dissolved in an appropriate amount of hexane and the like. There is a method of treating at ~ 200 ° C for 2 to 10 hours and then drying. As a method for treating the coated powder 1 with alkylphosphoric acid, X in the formulas (1) and (2) can be used.
^{When 1} and X ² or X ³ are hydrogen, the coating powder 1 is dispersed in a solution of the above-mentioned alkylphosphoric acid in a solvent such as isopropyl alcohol or hexane, and the temperature is 50 ° C to 7 ° C.
There is a method of treating at 0 ° C. for 1 to 3 hours, then distilling off the solvent and then drying. Further, in the formulas (1) and (2), X ¹ or X
^{When 2} and X ³ are other than hydrogen (when it is an alkali metal or amine), the coating powder 1 is dispersed in a solution of the above-mentioned alkali metal salt or amine salt of alkylphosphoric acid in water, There is a method of treating at 70 ° C. for 1 to 3 hours, then neutralizing with a suitable acid, filtering while hot, washing with an aqueous ethanol solution, and then drying. These coated powder 1
The method of water repellent treatment is not limited to the above example.

As the method for treating the coated powder 1 with the N-mono long-chain aliphatic acyl basic amino acid, either a dry method or a wet method can be used. The dry method is simple and effective, and either the fine powder of N-mono long-chain aliphatic acyl basic amino acid is mixed with barium sulfate powder by stirring, or the N-mono long-chain aliphatic acyl basic amino acid and sulfuric acid are mixed. The surface of the barium sulfate powder can be easily treated by mixing the barium powder and then co-milling. In the wet method, since N-mono long-chain aliphatic acyl basic amino acids are hardly dissolved in water near neutrality and ordinary oil, calcium chloride is used as a solubilizing agent, and N-mono long-chain aliphatic acyl basic amino acids are used. After being dissolved in an organic solvent, the surface of the barium sulfate powder can be treated by bringing it into contact with barium sulfate powder and further washing with water to remove calcium chloride and drying. Alternatively, the N-mono long-chain aliphatic acyl basic amino acid is dissolved in acidic or alkaline water or an aqueous solvent and contacted with barium sulfate powder, and then neutralized to near neutrality to form a barium sulfate powder surface. The same surface treatment can be carried out by depositing N-mono long-chain aliphatic acyl basic amino acid, depositing the salt produced by neutralization by washing with water, and drying the salt (JP-A-61-2202, JP-A-61-2202). -10503).

The amount of the water repellent treatment agent applied to the surface-treated barium sulfate powder is preferably 0.05 to 20% by weight, more preferably 2 to 10% by weight. Within this range, sufficient water repellency and good feel can be obtained, which is preferable.

Since the surface-treated powder thus obtained can be appropriately mixed with the components used in ordinary cosmetics, use of this can provide a cosmetic having an excellent sharpness suppressing effect.

In the cosmetic of the present invention, the blending amount of the treated powder is arbitrarily selected according to the properties of the cosmetic, but is 0.1 to 99% by weight, especially 1 to 95% by weight based on the total amount of the cosmetic ingredients. % Is preferred.

In the cosmetic of the present invention, in addition to the surface-treated powder which is the above-mentioned essential component, if necessary, components which are blended in ordinary cosmetics within a range not impairing the effects of the present invention, for example, Various oils, surfactants, other powders, water-soluble polymers,
Preservatives, drugs, dyes, fragrances, humectants, ultraviolet absorbers, inorganic or organic salts, chelating agents, pH adjusters, water and the like may be added.

As the oil, for example, liquid paraffin,
Vaseline, paraffin wax, squalane, beeswax, carnauba wax, olive oil, lanolin, higher alcohols, fatty acids, higher fatty acids, ester oils, ceresin,
Oils commonly used in cosmetics such as microcrystalline wax, candelilla wax, diglyceride, triglyceride, silicone oil, perfluoropolyether, perfluorodecalin, perfluorooctane, jojoba oil, octyldodecyl myristate, neopentyl glycol dioctanoate, etc. Used. As a surfactant,
For example, polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, glycerin fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitol fatty acid ester, etc. Nonionic surfactants; anionic surfactants represented by fatty acid soaps such as sodium stearate and triethanolamine palmitate; and interfaces commonly used in cosmetics such as cationic surfactants and amphoteric surfactants Activators are used. Examples of the water-soluble polymer include carboxymethylcellulose, methylcellulose, hydroxymethylcellulose, polyvinyl alcohol, polyvinylpyrrolidone, tragacanth gum, carrageenan, locust bean gum, dextrin, dextrin fatty acid ester, carboxyvinyl polymer, xanthan gum, gelatin, sodium alginate, and gum arabic. The water-soluble polymer generally used for cosmetics is used.

Examples of moisturizers include cosmetics such as sorbitol, xylitol, glycerin, maltitol, propylene glycol, 1,3-butylene glycol, 1,4-butylene glycol, sodium pyrrolidonecarboxylate, lactic acid, sodium lactate and polyethylene glycol. A moisturizer commonly used for is used. As an antiseptic,
For example, preservatives commonly used in cosmetics such as paraoxybenzoic acid alkyl ester, sodium benzoate and potassium sorbate are used. As the drug, for example, drugs commonly used in cosmetics such as vitamins, crude drugs, antiphlogistics, and bactericides are used. Examples of the ultraviolet absorber include paraaminobenzoic acid-based ultraviolet absorbers, anthranyl-based ultraviolet absorbers, salicylic acid-based ultraviolet absorbers, cinnamic acid-based ultraviolet absorbers, and benzophenone-based ultraviolet absorbers, which are commonly used in cosmetics. Used.

Other powders include, for example, talc, mica, kaolin, sericite, muscovite, synthetic mica, phlogopite, phlogopite, biotite, lithia mica, vermiculite,
Magnesium carbonate, calcium carbonate, diatomaceous earth, magnesium silicate, calcium silicate, aluminum silicate, barium silicate, strontium silicate, tungstate metal salt,
Hydroxyapatite, hydrous silicic acid, anhydrous silicic acid, magnesium oxide, bentonite, zeolite, ceramic powder, inorganic powder such as aluminum hydroxide; nylon powder, polyethylene powder, polymethylbenzoguanamine powder, polymethylmethacrylate powder, tetrafluoroethylene powder fine Organic powders of crystalline cellulose, rice starch lauroyl lysine, etc .; surfactant metal salt powders of calcium stearate, zinc stearate, magnesium stearate, magnesium myristate, calcium cetyl phosphate, sodium zinc cetyl phosphate, etc .; titanium oxide, oxidation Zinc, zirconium oxide, iron oxide (red iron oxide), iron titanate, iron hydroxide, ocher, black iron oxide, carbon black, mango violet, cobalt violet, oxidation Inorganic colored powders such as ROM, chromium hydroxide, cobalt titanium, ultramarine, dark blue; titanium oxide coated mica, titanium oxide coated bismuth oxychloride, bismuth oxychloride, titanium oxide coated talc, fish scale foil, colored titanium oxide coated mica, etc. Pearl pigment; aluminum powder, stainless powder,
Powders commonly used in cosmetics such as metal powders such as copper powder and powders treated with silicon or a fluorine compound are used.

Examples of dyes include Red No. 3 and Red No. 10
No. 4, Red 106, Red 201, Red 202, Red 204, Red 205, Red 220, Red 226
No., Red 227, Red 228, Red 230, Red 401, Red 505, Yellow 4, Yellow 5, Yellow 2
02, yellow 203, yellow 204, yellow 401,
Blue No. 1, Blue No. 2, Blue No. 201, Blue No. 404, Green No. 3, Green No. 201, Green No. 204, Green No. 205,
Orange 201, Orange 203, Orange 204, Orange 20
Tar dyes such as No. 6 and orange No. 207; natural dyes such as carminic acid, laccaic acid, bradylin, and crocin, which are commonly used in cosmetics, are used.

Examples of the inorganic salt or organic acid salt include inorganic acids such as hydrochloric acid, sulfuric acid and nitric acid; oxycarboxylic acids such as citric acid, tartaric acid, lactic acid and malic acid; carboxylic acids such as formic acid, acetic acid and sorbic acid; or salicylic acid. , An alkali metal salt, an alkaline earth metal salt or an aluminum salt of an aromatic carboxylic acid such as benzoic acid.

Specific examples of preferred inorganic or organic acid salts include potassium sulfate, sodium sulfate, magnesium sulfate, aluminum sulfate, potassium nitrate, sodium nitrate, magnesium nitrate, aluminum nitrate, calcium nitrate, potassium chloride, magnesium chloride and sodium chloride. , Calcium chloride, aluminum chloride, potassium carbonate, sodium carbonate, aluminum carbonate, potassium acetate, sodium acetate, calcium acetate, magnesium acetate, sodium formate, potassium formate, magnesium formate, sodium citrate, sodium tartrate, potassium sorbate, sorbic acid Sodium, sodium salicylate, potassium benzoate, sodium benzoate and the like can be mentioned, particularly potassium sulfate, magnesium sulfate, potassium chloride, magnesium chloride. Aluminum chloride, sodium citrate, sodium tartrate, potassium sorbate,
Sodium salicylate and sodium benzoate are preferred.

These inorganic salts or organic acid salts may be added to the cosmetic composition in the form of a salt, but they are necessary to form the corresponding acid substance and basic substance at the time of producing the cosmetic product to form a salt. It may be produced by adding a stoichiometric amount. Further, water can be added in any amount.

The cosmetic material of the present invention can be produced by a conventional method except that the above-mentioned coating powder 1 is blended.

The cosmetics of the present invention include liquid foundations, cream foundations, oily solid cosmetics, lipsticks, water-in-oil cosmetics such as emulsions / creams and oily solid cosmetics, powder foundations, white powders,
Examples include makeup cosmetics such as solid white powder, eye shadow, face powder, blusher, eyeliner, and eyebrow pencil, and basic cosmetics.

[0036]

The present invention will be described in more detail with reference to examples, but the present invention is not limited thereto.

Reference Example 1 1.974 g of special grade barium chloride reagent and 0.50 of special grade sulfuric acid
Dissolve 5 g in 1000 g of ion-exchanged water, and
A barium solution of 008 mole / l and a sulfuric acid solution of 0.005 mole / l were used. Next, each solution was heated to 70 ° C., a barium solution was added dropwise to the sulfuric acid solution stirred at a rotation speed of 1000 rpm for 10 minutes using a U-shaped stirring spring, and then stirring was continued for 3 minutes to complete the reaction. The pH during the reaction was 3.5. Then, the mixture was cooled to room temperature, filtered through a 5C filter paper, washed with water, and dried at 105 ° C. for 2 hours to obtain barium sulfate powder 1.
12 g was obtained. The obtained powder has a plate-shaped surface with an average diameter of 5.
3 μm, aspect ratio is 58, and the perimeter of the plate-like surface is 2
The ratio of the square to the area of the orthographic plane of the plate-like surface was 88: 1. In addition, in the X-ray diffraction, (0
The diffraction peak ratio of the (20) and (200) planes is 5.3,
It has a butterfly shape and has a well-developed plate-like structure.
The powder was transparent and slippery. The degree of development of the plate-like structure was measured as follows. That is, 1 g of the powder is dispersed in 50 ml of ethanol, then a thin film having a thickness of about 15 μm is formed on a glass plate, and after drying, the intensity of the (020) / (200) diffraction peak of the crystal is determined by X-ray diffraction. It was evaluated by the ratio. X-ray diffraction is made by Rigaku Denki (type; RAD-200) with CuKα rays, 40 kV, 8
It was performed at 0 mV.

Comparative Example 1 100 g of the butterfly-like barium sulfate obtained in Reference Example 1
2 g of methyl hydrogen polysiloxane and an appropriate amount of hexane were dispersed in the above, and treated at 160 ° C. for 6 hours to obtain 99 g of barium sulfate treated with silicone.

Example 1 100 g of butterfly-like barium sulfate obtained in Reference Example 1
Was dispersed in an aqueous solution in which 8 g of sodium aluminate was dissolved, and sulfuric acid was added to this to hydrolyze to deposit alumina on the surface of barium sulfate. Next, the powder was separated by filtration, washed with water and dried to obtain aluminum hydroxide-treated barium sulfate. This is baked and alumina treated barium sulfate 1
03 g was obtained.

Example 2 2 g of methylhydrogenpolysiloxane was added to 100 g of alumina-treated barium sulfate obtained in the same manner as in Example 1.
And an appropriate amount of hexane were dispersed and treated at 160 ° C. for 6 hours to obtain 99 g of silicon-treated alumina-treated barium sulfate.

Example 3 To 100 g of alumina-treated barium sulfate obtained in the same manner as in Example 1, 10 g of dicetyl phosphoric acid and 50 parts of ethanol were added.
Add what was heated and dissolved (60 ℃) to 0g, and add 3 at 60 ℃.
Mix for 0 minutes. Then, ethanol was distilled off under reduced pressure at 60 ° C. and drying was performed to obtain 103 g of dicetyl phosphate treated alumina treated barium sulfate.

Example 4 150 g of the alumina-treated barium sulfate obtained in the same manner as in Example 1 and 7.5 g of N-lauroyl lysine were placed in a Henschel mixer and stirred for 10 minutes to perform surface treatment, and N-lauroyl was used. 155 g of lysine-treated alumina-treated barium sulfate was obtained.

Example 5 A round bottom flask (or kneader) is charged with 50 g of alumina-treated barium sulfate obtained in the same manner as in Example 1.
50 g of calcium chloride was dissolved in 2500 g of ethanol in advance, and then 2.5 g of N-lauroyl lysine was added.
Was added and mixed with stirring at room temperature for 2 hours. It is then filtered and washed with water to remove calcium chloride,
After drying, 51 g of N-lauroyl lysine treated alumina treated barium sulfate was obtained.

Test Example 1 Dimethyl silicone oil (K, manufactured by Shin-Etsu Chemical Co., Ltd.) as a dispersion medium
F-96-1000CS), and a powder as a sample is kneaded by a Hoover Mahler and dispersed uniformly (concentration 20%). Using a baker applicator,
A thin film with a thickness of 15 μm is formed on a transparent glass plate.
Using this as a sample, the scattering transmittance (H) was measured. Measuring instrument is Murakami Color Research Laboratory reflection / transmittance meter HR-100
Was used to measure the total transmittance (Tt) and the diffuse transmittance (Td), and the scattering transmittance (H = Tt / Td) was determined from these. The results are shown in Table 1.

[0045]

[Table 1]

From Table 1, it can be seen that the coated pigment of the present invention has a higher scattering transmittance and a higher total transmittance than any of the commercially available pigments, and thus has high transparency and a large sharpness suppressing effect. .

Example 6 Powder foundation:

[Table 2] (Composition) (%) (1) Remaining amount of mica (2) Coated powder obtained in Example 50 (3) Talc 20 (4) Titanium oxide 10 (5) Red iron oxide 0.8 (6) ) Yellow iron oxide 2.5 (7) Black iron oxide 0.1 (8) Liquid paraffin 8 (9) Beeswax 2 (10) Preservative suitable amount (11) Fragrance total amount 100.0

(Production method) Components (1) to (7) are mixed and pulverized. Transfer this to a high-speed blender, and then add ingredient (8)-
What was mixed and dissolved in (10) at 80 ° C. was added and mixed uniformly. Ingredient (11) is added to this mixture, mixed, and then ground again and passed through a sieve. This is compression molded on a gold plate.

Example 7 Powder foundation: The content of the component (2) of Example 6 was reduced to 10%.

Example 8 Powder Foundation: The content of the component (2) of Example 6 was increased to 80% and the components (3) and (4) were removed.

Example 9 Powder Foundation: The component (2) of Example 6 was replaced with that obtained in Example 3.

Comparative Example 2 Powder foundation:

[Table 3] (Composition) (%) (1) Remaining amount of mica (2) Commercial product Plate barium sulfate 50 (3) Talc 20 (4) Titanium oxide 10 (5) Red iron oxide 0.8 (6) Yellow iron oxide 2.5 (7) Black iron oxide 0.1 (8) Liquid paraffin 8 (9) Beeswax 2 (10) Preservative suitable amount (11) Fragrance total amount 100.0

(Production method) Components (1) to (7) are mixed and pulverized. Transfer this to a high-speed blender, and then add ingredient (8)-
What was mixed and dissolved in (10) at 80 ° C. was added and mixed uniformly. Ingredient (11) is added to this mixture, mixed, and then ground again and passed through a sieve. This is compression molded on a gold plate.

Comparative Example 3 Powder foundation:

[Table 4] (Composition) (%) (1) Remaining amount of mica (2) Nylon powder 10 (3) Talc 20 (4) Titanium oxide 10 (5) Red iron oxide 0.8 (6) Yellow iron oxide 2.5 ( 7) Black iron oxide 0.1 (8) Liquid paraffin 8 (9) Beeswax 2 (10) Preservative suitable amount (11) Perfume trace amount total 100.0

(Production method) Components (1) to (7) are mixed and pulverized. Transfer this to a high-speed blender, and then add ingredient (8)-
What was mixed and dissolved in (10) at 80 ° C. was added and mixed uniformly. Ingredient (11) is added to this mixture, mixed, and then ground again and passed through a sieve. This is compression molded on a gold plate.

Test Example 2 Practical tests of Comparative Examples 2 and 3 and Examples 6 to 9 on the following items were carried out by 14 professional panelists, and the result was 5
An average score of 14 persons was calculated by summing up points, 4 points were good, 3 points were normal, 2 points were bad and 1 point was bad. The results are shown in Table 5.

[Item] Item 1: Difficult to see pores and wrinkles. Item 2: Fineness of texture. Item 3: A feeling of bare skin. Item 4: Cover power.

[0058]

[Table 5]

As is clear from Table 5, when the cosmetic composition of the present invention was applied to the skin, it was confirmed that troubles related to the morphology such as pores and wrinkles were difficult to see due to the sharpness suppressing effect of the blended coating pigment. Furthermore, it has become clear that the fineness of the texture that expresses the texture of the skin is also improved, and that the feeling of bare skin and the covering power, which cannot be satisfied at the same time with conventional cosmetics, can be satisfied at the same time.

Example 10 Solid white powder:

[Table 6] (Composition) (%) (1) Remaining amount of mica (2) Coated powder obtained in Example 4 50 (3) Talc 20 (4) Titanium oxide 0.5 (5) Red iron oxide 0.1 (6) Yellow iron oxide 0.1 (7) Black iron oxide 0.01 (8) Liquid paraffin 8 (9) Beeswax 2 (10) Preservative suitable amount (11) Perfume trace amount total 100.00

(Production method) Components (1) to (7) are mixed and pulverized. Transfer this to a high-speed blender, and then add ingredient (8)-
What was mixed and dissolved in (10) at 80 ° C. was added and mixed uniformly. Ingredient (11) is added to this mixture, mixed, and then ground again and passed through a sieve. This is compression molded on a gold plate.

Example 11 White powder:

[Table 7] (Composition) (%) (1) Remaining amount of mica (2) Coated powder obtained in Example 50 (3) Talc 20 (4) Titanium oxide 0.5 (5) Red iron oxide 0.1 (6) Yellow iron oxide 0.1 (7) Black iron oxide 0.01 (8) Magnesium stearate 10 (9) Preservative A suitable amount (10) Perfume Trace amount total 100.00

(Production method) Components (1) to (8) are mixed and pulverized. Transfer this to a high-speed blender, and further add ingredients (9)-
The product obtained by mixing and dissolving (10) at 80 ° C. is added and uniformly mixed, then pulverized again and passed through a sieve to obtain a product.

Example 12 Creamy foundation:

[Table 8]

(Production method) Components (1) to (14) are mixed and pulverized. Separately, a solution in which the aqueous phase components (7) to (10) are mixed is prepared, and a crushed pigment is added to disperse the solution, followed by heating to 75 ° C. The oil phase components (1) to (6) heated and dissolved at 80 ° C. are added to the previously prepared aqueous phase with stirring to emulsify. This is cooled with stirring and the component (15) is added at 50 ° C.
Is added and cooled with stirring to obtain a product.

Example 13 Blusher:

[Table 9] (Composition) (%) (1) Remaining amount of mica (2) Coated powder obtained in Example 2 50 (3) Talc 20 (4) Titanium oxide 4 (5) Zinc stearate 5 (6) ) Rice starch 5 (7) Coloring material 3 (8) Liquid paraffin 3 (9) Preservative proper amount (10) Fragrance total amount 100

(Production method) Components (1) to (7) are mixed and developed. Next, components (8) to (10) are added by spraying in a mixer, mixed evenly, passed through a sieve, and then compressed in a metal plate using a pressing machine to be solidified.

Example 14 Eyeshadow:

[Table 10] (Composition) (%) (1) Remaining amount of mica (2) Coated powder obtained in Example 2 50.0 (3) Talc 5.0 (4) Mica titanium 5.0 (5) Zinc stearate 5.0 (6) Zinc laurate 3.0 (7) Coloring pigments (black iron oxide, red iron oxide, yellow iron oxide) 10.0 (8) Liquid paraffin 7.5 (9) Preservative A suitable amount (10 ) Fragrance Total amount 100.0

(Production method) Components (1) to (7) are mixed and developed. Next, components (8) to (10) are added by spraying in a mixer, mixed evenly, passed through a sieve, and then compressed in a metal plate using a pressing machine to be solidified.

Example 15 Lipstick:

[Table 11] (Composition) (%) (1) Titanium oxide 1.0 (2) Red No. 201 1.0 (3) Red No. 202 2.0 (4) Yellow No. 4 aluminum lake 1.0 (5) Red No. 223 0.1 (6) Coated powder obtained in Example 2 5.0 (7) Castor oil 46.9 (8) Octyldodecanol 15.0 (9) Lanolin 5.0 (10) Liquid Lanolin 5.0 (11) Beeswax 5.0 (12) Ozokerite 4.0 (13) Candelilla wax 7.0 (14) Carnauba wax 1.0 (15) Antioxidant proper amount (16) Preservative proper amount (17) Fragrance Total amount 100.0

(Production Method) Components (7) to (14) are heated and melted and uniformly mixed. (1) to (6) were added to this, and the mixture was kneaded with a roll mill to disperse uniformly and then remelted (15)
~ (17) is added, and after defoaming, it is poured into a mold and rapidly cooled to solidify. Remove the cake from the mold and load it in a container. Next, after adjusting the appearance of the stick, let it pass through the flame,
Make the surface uniform.

Example 16 Eyeliner:

Table 12 (Composition) (%) (1) Carnauba wax 5.0 (2) Beeswax 1.0 (3) Microcrystalline wax 10.0 (4) White petrolatum 1.0 (5) Light liquid isoparaffin 67.5 (6) Organic bentonite 0.5 (7) Coated powder obtained in Example 2 10.0 (8) Titanium oxide 3.0 (9) Carbon black 2.0 (10) Preservative proper amount total 100. 0

(Production method) (6) is added to a part of the component (5), and the mixture is dispersed and gelled through a colloid mill. On the other hand, (1) to (4) and (10) were mixed, heated and dissolved, (7) to (9) were added, cooled, kneaded with a roll mill, and heated again to be melted, and bentonite was added. Add the gel and the rest (5) and cool with stirring.

Example 17 O / W cream:

[Table 13] (Composition) (%) (1) Beeswax 5.5 (2) Cetanol 4.5 (3) Hydrogenated lanolin 7 (4) Squalane 33 (5) Fatty acid glycerin 3.5 (6) Lipophilic type Glycerin monostearate 2 (7) Polyoxyethylene sorbitan monolauric acid ester (20E.O.) 2 (8) Coated powder obtained in Example 2 8 (9) Perfume 0.1 (10) Preservative 0 .2 (11) antioxidant 0.1 (12) propylene glycol 10 (13) purified water Balance total 100.0

(Production method) Components (8), (10), (12)
Stir and mix (13) and (13) and keep at 80 ° C. The other ingredients are mixed, heated and dissolved to 80 ° C. The above-mentioned water phase portion is added to this oil phase portion to pre-emulsify the mixture, which is homogenized with a homomixer and then cooled to 30 ° C to obtain a product.

[0076]

EFFECTS OF THE INVENTION The coated powder of the present invention has a completely new optical effect which conventional pigments do not have, that is, a sharpness suppressing effect, and cosmetics containing the same have excellent transparency and bare skin feeling. It is an excellent cosmetic that simultaneously satisfies the effect of concealing troubles related to the form of pores, wrinkles, and the like.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-330007 (JP, A) JP-A-4-41411 (JP, A) JP-A-4-5217 (JP, A) JP-A-5- 39436 (JP, A) JP-A-6-171932 (JP, A) JP-A-4-5215 (JP, A) JP-A-7-291623 (JP, A) JP-A-6-92630 (JP, A) JP-A-6-234518 (JP, A) JP-A-3-115211 (JP, A) JP-A-60-228406 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) A61K 7/00-7/50 C09C 1/02

Claims (3)

(57) [Claims] 1. A plate-like structure having an aspect ratio of 5
˜100, and the ratio of the square of the perimeter of the plate-like surface to the area of the orthogonal projection surface of the plate-like surface is 20: 1 to 150: 1, barium sulfate powder is converted into aluminum oxide or hydroxide. A coated powder surface-treated with aluminum, which has a scattering transmittance of 65% when a thin film having a thickness of 15 μm is formed at a concentration of 20% by weight of the coated powder using dimethylpolysiloxane (1000 cs) as a dispersion medium. The coated powder having the above and a total transmittance of 85% or more. 2. A coated powder obtained by subjecting the surface of the coated powder according to claim 1 to a water repellent treatment. 3. A cosmetic containing the coated powder according to claim 1.