JP3492966B2 - Cosmetics - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cosmetic composition capable of changing the hue sensation of the skin while having a transparent feeling, and having an excellent effect of making it difficult to see color spots, freckles and the like present on the skin. Regarding

[0002]

2. Description of the Related Art Conventionally, basic cosmetics and make-up cosmetics are applied to change the texture of the skin. Therefore, powder having strong diffuse reflection is blended to obtain a matte finish, mica and the like. For example, a powder with strong specular reflection is mixed to obtain a glossy finish. In addition, pigments with high hiding power such as titanium dioxide and iron oxide are added to cover dull skin (dark and yellowish skin) due to poor blood circulation and aging, and uneven coloring such as spots and freckles. In addition, red tints such as red iron oxide, lake pigments and organic pigments have been added to change the hue sense of the skin.

On the other hand, a green pigment, which is a complementary color of red, is used to hide a reddish face or acne scars, and a blue or purple pigment is used to give a transparent feeling to change the hue sense of the skin. Is being done.

However, when a pigment having a high hiding power is used, there is a problem that the natural feeling is lost. Further, when the principle of complementary color is used, there is a problem that although the hue can be covered, the saturation is lowered and the skin color is dull. These problems arise because the method is a hue control based on subtractive color mixture, and the more the colors are overlapped, the lower the saturation becomes, and the closer the color is to gray.

As described above, in the conventional makeup cosmetics, it is difficult to effectively change the hue sensation of the skin and to make the unevenness of color such as spots and freckles difficult to be seen, while giving transparency.

[0006]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a cosmetic composition capable of changing the hue of the skin while imparting a transparent feeling, and capable of covering color unevenness such as spots and freckles. To provide.

[0007]

Means for Solving the Problems The present inventors have used a metal oxide plate-like powder having a hollow structure and an inorganic powder having a specific optical property in combination to give a transparent feeling to the skin. It has been found that a cosmetic composition capable of changing the hue sense of the above and excellent in concealing color unevenness such as spots and freckles can be obtained.

That is, the present invention relates to (A) a hollow-structured metal oxide plate-like powder (B) having a refractive index of 1.6 to 1.8, a powder concentration of 20% by weight and a thickness of 25 μm. Plate-like, with a scattered transmittance of 70% or more and a total transmittance of 85% or more when formed
Structured aluminum oxide, barium sulfate and nitriding
The present invention provides a cosmetic characterized by containing an inorganic powder selected from boron .

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The "plate-like powder" of the hollow-structured metal oxide plate-like powder (component (A)) used in the present invention means the aspect ratio (long axis length and thickness of the powder). Ratio of 5 to 1
A powder in the range of 00 is used. Particularly, in terms of reducing the coefficient of friction to improve the feeling of use and ease of manufacturing,
The aspect ratio is preferably in the range of 10 to 70. The average particle size (measured by a laser diffraction / scattering type particle size distribution measuring device) is preferably 12 μm or less, particularly 5 to 12 μm, from the viewpoint of improving the feeling of use and reducing the feeling of glare.

The metal oxide that constitutes the plate-like powder is
For example, those having a high refractive index such as titanium dioxide, iron oxide, zirconium oxide, and tin oxide (for example, a refractive index of 1.7 to
2.8) is preferred, especially titanium dioxide (refractive index 2.5
To 2.7) are preferable, and among them, titanium dioxide having a rutile crystal system (refractive index 2.7) is preferable.

The component (A) is a plate-like powder made of a metal oxide and has a cavity inside. For example, it can be produced by a method in which a plate-shaped substrate such as mica or calcium sulfate is coated with a metal oxide, and then only the substrate substance is dissolved and removed with an acid or an alkali to make the inside of the powder hollow (special feature. JP-A-55-60565, JP-A-9
-194757, JP-A-49-45129). Here, as the plate-shaped substrate, mica, for example, muscovite,
Biotite, phlogopite, etc .; calcium sulfate, such as gypsum dihydrate, can be used, but mica is particularly preferable. Examples of the acid used for dissolving the substrate substance include mineral acids such as hydrofluoric acid, hydrochloric acid, sulfuric acid, nitric acid and phosphoric acid, and examples of the alkali include sodium hydroxide and potassium hydroxide. The substance such as mica or calcium sulfate used as the substrate may remain up to 20% by weight in the produced plate-like powder, but in terms of the intensity of interference color, the lower the amount is, the more preferable. In this respect, a method of bringing the metal oxide-coated plate-like powder into contact with an aqueous acid solution containing a mineral acid and then with an aqueous alkali solution is preferable because the content rate of the base substance can be further lowered (Japanese Patent Laid-Open No. H9-96952). -194757). The hollow powder does not have to have a surface completely composed of a metal oxide layer, and may have a part missing. In addition, various color tones can be created by controlling the optical thickness (coating thickness) of the metal oxide of the metal oxide-coated plate-like powder before dissolving the substrate substance. Furthermore, it is possible to create various color tones by using two or more kinds of powders in combination.

The hollow-structured metal oxide plate-like powder of component (A) may be used after its surface has been subjected to a hydrophobizing treatment from the viewpoint of improving makeup retention (persistence). The hydrophobizing treatment is carried out by treating with a hydrophobizing agent according to a usual method.
Examples of the hydrophobizing agent include silicone oil, fatty acid metal salt, alkylphosphoric acid, alkali metal salt or amine salt of alkylphosphoric acid, N-mono long-chain (C8 to C22) aliphatic acyl basic amino acid, and Examples thereof include a fluorine compound having a fluoroalkyl group. Examples of silicone oils include various chain silicones, cyclic silicones, and modified silicones; fatty acid metal salts have especially 12 carbon atoms.
Salts of calcium, magnesium, zinc, aluminum, etc. of fatty acids of 18 to 18; alkylphosphoric acid and salts thereof include mono- or diesters having an alkyl or alkenyl group with a total of 8 to 45 carbon atoms and alkali metal salts or amine salts thereof. As the N-mono long-chain aliphatic acyl basic amino acid, 2-ethylhexanoyl, capryloyl, lauroyl, myristoyl, palmitoyl, stearoyl, isostearoyl, oleoyl, behenoyl,
A compound in which an acyl group having 8 to 22 carbon atoms such as cocoyl, tallow fatty acid acyl, and hardened tallow fatty acid acyl is bonded to the amino group at the α-position or the ω-position of a basic amino acid; as the fluorine compound having a perfluoroalkyl group, US Patent No. 36
32744, JP-A-62-250074, JP-A-55-167209, JP-A-2-21.
Examples thereof include those described in Japanese Patent No. 8603.

The amount of the hydrophobic treatment of the component (A) is 0.0005 to 0.2 part by weight of the hydrophobic treatment agent per 1 part by weight of the component (A), from the viewpoint of sufficient hydrophobicity and good feel. Especially 0.0
2 to 0.1 parts by weight is preferable.

The component (B) used in the present invention is an inorganic powder having a large light scattering transmittance and a high total transmittance, and light when a thin film having a thickness of 25 μm is formed at a powder concentration of 20% by weight. Has a scattering transmittance of 70% or more and a total transmittance of 85%
The above is necessary from the viewpoints of the effect of making color unevenness difficult to see and the transparency. The refractive index of the powder is 1.6 to 1.
8, the inorganic powder having a refractive index outside this range is
It can be used if it is coated with an organic polymer or the like to adjust the refractive index. Here, the component (B) does not have a hollow structure.

Here, the light-scattering transmittance and the total transmittance are measured as follows. That is, powder (concentration 20% by weight) in a dispersion medium dimethyl silicone oil (viscosity 1000 mPa · s)
Knead and evenly disperse, and use an applicator to
A thin film having a thickness of 5 μm is formed on a transparent glass plate and measured using a reflection / transmittance meter HR-100 manufactured by Murakami Color Research Laboratory. The scattering transmittance is the total transmittance excluding the transmittance of light traveling straight in the range of a viewing angle of 7 °, and the total transmittance is the total transmitted light amount divided by the incident light amount.

The preferred inorganic powder as the component (B) of the present invention is aluminum oxide, barium sulfate or boron nitride having a plate-like structure, and particularly has an aspect ratio of 5 to 5.
The plate-like barium sulfate having a ratio R of 100 and the ratio R of the square of the perimeter of the plate-like surface to the area of the orthographic projection surface of the plate-like surface is 20: 1 to 150: 1. Is preferred.
Here, the plate-like structure includes flakes, flakes, leaflets, petals,
Mica-like, foil-like, etc. are included. A particularly preferable form of barium sulfate is a butterfly form having one or two mirror image planes perpendicular to the plate-like surface and having a recess at the edge (Japanese Patent Laid-Open No. 4-5215). The inorganic powder as the component (B) is preferably used after being subjected to a hydrophobic treatment in the same manner as the component (A).

The cosmetics of the present invention can be produced according to a conventional method, for example, basic cosmetics such as lotions, emulsions, creams; white powder, solid white powder, face powder, powder foundation, oil foundation, cream foundation, It can be used as a makeup cosmetic such as liquid foundation, concealer, lipstick, lip balm, blusher, eyeliner, eye shadow, eyebrow.

The content of the component (A) in the cosmetic composition of the present invention is 0.1 to 30% by weight from the viewpoint of sufficiently exerting the effect of the composition and avoiding unnaturalness due to a strong glossy feeling. (Hereinafter, simply indicated by "%"), particularly preferably 0.5 to 30%. Furthermore, in the case of lotion, emulsion and cream, it is preferable to add 0.1 to 10%, especially 0.5 to 8% in the total composition, and in the case of white powder, solid white powder and face powder, 0.1 to 10% is preferable. 30%, especially 0.5-30%, 0.1-30% for powder foundations and oil foundations, especially 0.5-30%, 0.1-30 for cream foundations, liquid foundations and concealers. %, Especially 0.5-25%, 0.1-20% for lipsticks and lip balms, especially 0.5-15%, 0.1 for blushers and eye shadows
-30%, especially 0.5-25%, and in the case of eyeliner and eyebrow, it is preferably 0.1-30%, especially 0.5-20%.

The content of the component (B) in the cosmetic of the present invention is preferably 0.01 to 99%, particularly preferably 0.1 to 90%. In addition, regarding the cosmetics in which the components (A) and (B) are combined, in order to make the spots and freckles on the skin inconspicuous and to exhibit the desired optical characteristics, the mixing ratio (weight ratio) of these components Is preferably in the range of (A) / (B) = 1/10 to 10/1.

[0020]

EXAMPLES Production Example 1 1.0 g of anatase-type titanium oxide-coated mica exhibiting green interference light was weighed into a 250 mL polypropylene beaker, and 50 mL of distilled water was further added. A stirring rod covered with plastic and a heating mantle were installed so that the temperature could be controlled. 5.0 mL of concentrated sulfuric acid from a glass pipette under stirring
Was added, and then 2.0 mL of concentrated hydrofluoric acid (50%) was added from a synthetic resin pipette. This suspension is then 70
Heated at ° C for 1 hour. After adding 200 mL of distilled water, the slurry was filtered with a Buchner funnel and washed with 500 mL of distilled water to remove residual acid. The obtained powder is 30 at 120 ℃
After drying in an oven for 1 minute, a metal oxide plate-like powder having a hollow inside was obtained.

Production Example 2 Rutile-type titanium oxide-coated mica 90 exhibiting blue interference light
A suspension was prepared by mixing g, 124 g sulfuric acid, 60 g phosphoric acid and 300 mL distilled water. The suspension was refluxed at 120 ° C. for 6 hours, then cooled and filtered.
The press cake was washed with distilled water until the pH of the eluate was 2, and then slurried with 800 mL of distilled water without drying. 83 g of sodium hydroxide was added to make a 9% sodium hydroxide solution, and the mixture was heated to 60 ° C. After stirring for 1 hour, the mixture was filtered and the pressed cake was washed until the pH of the eluate reached 10. This product was dried at 100 ° C. for 14 hours to obtain a metal oxide plate-like powder having a hollow inside.

Example 1 (Powder Foundation) A powder foundation having the composition shown in Table 1 was produced according to a conventional method and its finish was evaluated. The results are shown in Table 2.

[0023]

[Table 1]

* 1 Refractive index 1.65, scattering transmittance 73
%, Total transmittance 88%, aspect ratio 58, R = 88: 1
Butterfly shape * 2 Refractive index 1.76, scattering transmittance 68%, total transmittance 8
0%, aspect ratio 1.5, R = 78: 1 plate

(Evaluation method) When the powder foundation is applied to the skin, the lack of dullness, brightness, naturalness,
The transparency and the difficulty of seeing stains and freckles were evaluated. 14 professional panelists evaluated each item as 5 points for good, 4 points for good, 3 points for normal, and 2 points for slightly bad.
An average value of 14 persons was calculated by setting 1 point as bad and 1 as bad.

[0026]

[Table 2]

When any of the cosmetics of the present invention was applied, it had a high transparency, a natural finish, and good visibility of spots and freckles.

Example 2 (Cream foundation) (Composition) (%) (1) Stearic acid 5.5 (2) Lipophilic glyceryl monostearate 2.5 (3) Cetostearyl alcohol 1.0 (4) Monolauryl propylene glycol 3.0 (5) Squalane 7.0 (6) Olive oil 8.0 (7) Purified water Balance (8) Preservative Appropriate amount (9) Triethanolamine 1.2 (10) Solbit 3.0 (11) Titanium dioxide 8.0 (12) Talc 5.0 (13) Color pigment (black iron oxide, red iron oxide, yellow iron oxide) Appropriate amount (14) Plate barium sulfate ^{* 3} 4.0 (15) Production example 1 powder 5.0 (16) Fragrance amount * 3: Refractive index 1.63, scattering transmittance 75%, total transmittance 89%

Example 3 (Powdered white powder) (Composition) (%) (1) Mica balance (2) Hollow metal oxide plate-like powder ^{* 4} 8.0 (3) Plate-like barium sulfate ^{* 5} 30. 0 (4) Talc 30.0 (5) Titanium dioxide 0.5 (6) Red iron oxide 0.1 (7) Yellow iron oxide 0.1 (8) Black iron oxide 0.01 (9) Magnesium stearate 10.0 (10) Preservative Appropriate amount * 4: Powder obtained by using rutile-type titanium oxide-coated mica that exhibits purple interference light as the raw material powder in Production Example 2 * 5: Refractive index 1.63, scattering transmission 71%, total transmittance 86%

Example 4 (solid white powder) (composition) (%) (1) Mica balance (2) Hollow metal oxide plate-like powder ^{* 6} 25.0 (3) Plate-like barium sulfate ^{* 7} 6. 0 (4) Talc 20.0 (5) Titanium dioxide 0.5 (6) Red iron oxide 0.1 (7) Yellow iron oxide 0.1 (8) Black iron oxide 0.01 (9) Liquid paraffin 8.0 ( 10) Beeswax 2.0 (11) Preservative Suitable amount (12) Fragrance Small amount * 6: Powder obtained by using rutile type titanium oxide coated mica that exhibits purple interference light as the raw material powder of Production Example 2. (1 part by weight) treated with dimethylpolysiloxane (0.02 parts by weight) * 7: Refractive index 1.64, scattering transmittance 72%, total transmittance 88%

Example 5 (Blusher) (Composition) (%) (1) Mica balance (2) Hollow metal oxide plate-like powder ^{* 8} 20.0 (3) Talc 20.0 (4) Plate Barium sulfate (same as in Example 1) 7.0 (5) Titanium dioxide 4.0 (6) Zinc stearate 5.0 (7) Rice starch 5.0 (8) Coloring material 3.0 (9) Liquid paraffin 3.0 (10) Preservative Appropriate amount (11) Perfume Slight amount * 8: Manufactured by replacing the raw material powder of Production Example 1 with the anatase type titanium oxide coated mica that exhibits a red interference color (1 part by weight) Treated with lauroyl lysine (0.05 parts by weight)

Example 6 (Eyeshadow) (Composition) (%) (1) Mica balance (2) Hollow metal oxide plate-like powder ^{* 9} 20.0 (3) Talc 5.0 (4) Plate Barium sulfate (same as in Example 3) 7.0 (5) Mica titanium 5.0 (6) Zinc stearate 5.0 (7) Zinc laurate 3.0 (8) Color pigments (black iron oxide, red iron oxide) (Yellow iron oxide) 10.0 (9) Liquid paraffin 7.0 (10) Preservatives Appropriate amount (11) Perfume Slight amount * 9: Rutile type titanium showing red interference color as raw material powder in Production Example 2. Powder obtained using coated mica

Example 7 (Liquid Foundation) (Composition) (%) (1) Hydrophobized pigment (treated with methylhydrogenpolysiloxane) Titanium dioxide 6.0 Iron oxide (red, yellow, black) Appropriate amount (2) Polymethylsilsesquioxane powder (“Tospearl 145”, manufactured by Toshiba Silicone Co., Ltd.) 4.0 (3) Hollow metal oxide plate-like powder ^{* 10} 5.0 (4) Plate-like barium sulfate ( The product used in Example 2 (1 part by weight) treated with dimethylpolysiloxane (0.02 part by weight) 4.0 (5) octamethylcyclotetrasiloxane 20.0 (6) dimethylpolysiloxane (“ Silicone KF-96A ", manufactured by Shin-Etsu Chemical Co., Ltd.) 10.0 (7) Dimethylpolysiloxane / polyoxyalkylene copolymer (" SH3775C ", manufactured by Toray Dow Corning) 1 0 (8) Glycerin 2.0 (9) Purified water Balance * 10: that of Preparation 2 powder (1 part by weight) was treated with methyl hydrogen polysiloxane (0.02 parts by weight)

[0034] Example 8 (eyeliner) (Composition) (%) (1) Carnauba wax 5.0 (2) Beeswax 1.0 (3) Microcrystalline wax 10.0 (4) White vaseline 1.0 (5) Organic bentonite 0.5 (6) Light liquid paraffin balance (7) Dimethyl polysiloxane was added to the powder of Production Example 1 (1 part by weight).       Treated with (0.02 parts by weight) 10.0 (8) Plate-shaped barium sulfate (the one used in Example 4 (1 part by weight) was added to dimethyl poly       Treated with siloxane (0.02 parts by weight) 5.0 (9) Titanium dioxide 3.0 (10) Carbon black 2.0 (11) Preservative proper amount

[0035] Example 9 (O / W type cream) (Composition) (%) (1) Beeswax 5.5 (2) Cetanol 4.5 (3) Hydrogenated lanolin 7.0 (4) Squalane 33.0 (5) Fatty acid glycerin 3.5 (6) Lipophilic type glyceryl monostearate 2.0 (7) Polyoxyethylene sorbitan monolaurate (20E.O.)                                                       2.0 (8) Powder of Production Example 1 4.0 (9) Plate-shaped barium sulfate (same as in Example 1) 4.0 (10) Perfume 0.1 (11) Preservative 0.2 (12) Antioxidant 0.1 (13) Propylene glycol 10.0 (14) Purified water balance

All the cosmetics obtained in Examples 2 to 9 were highly transparent and had a natural finish, were able to change the hue sensation of the skin, and were difficult to see spots and freckles.

[0037]

EFFECT OF THE INVENTION The cosmetic composition of the present invention can produce a highly transparent and natural finish and change the hue of the skin.
Moreover, it is possible to make the stain freckles difficult to see.

[Brief description of drawings]

FIG. 1 is an electron micrograph showing the appearance of a metal oxide plate-like powder used in the present invention.

FIG. 2 is an electron micrograph showing the inside of the metal oxide plate-like powder used in the present invention.

─────────────────────────────────────────────────── ─── Continued Front Page (51) Int.Cl. ⁷ Identification Code FI A61K 7/032 A61K 7/032

Claims (3)

(57) [Claims] 1. The following components (A) and (B), (A) a hollow-structured metal oxide plate-like powder (B) having a refractive index of 1.6 to 1.8 and a powder concentration of 20. A plate-like material having a scattering transmittance of 70% or more and a total transmittance of 85% or more when a thin film having a thickness of 25 μm is formed by weight.
Structured aluminum oxide, barium sulfate and nitriding
A cosmetic containing an inorganic powder selected from boron . 2. The inorganic powder of component (B) has an aspect ratio of
Is 5 to 100 and the square of the perimeter of the plate surface
The ratio R of the plate-shaped surface to the area of the orthogonal projection surface is 20: 1 to 150:
The cosmetic according to claim 1, which is 1-type plate-shaped barium sulfate . 3. The average particle size of the powder of component (A) is 12 μm.
The cosmetic according to claim 1 or 2, which is as follows.