JPH09227114A - Pigment for colored cosmetic material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a pigment for a cosmetic material, coated so as not to expose the pigment to surface thereof by coating the surface of an inorganic base material having a flat and smooth plane by a metallic oxide gel containing the pigment. SOLUTION: This pigment for a cosmetic material is obtained by coating the surface of mica or a metallic oxide-coated mica having 1-10.0μm size and 0.1-30μm spherical diameter among inorganic base materials of a mica having a flat and smooth plane and a white and transparent feeling, or a mica titanium, etc., besides mineral-based inorganic pigment such as titanium oxide and ferric oxide, with a metallic oxide gel having >=0.05μm membrane thickness formed by a sol-gel method from a starting solution containing a metallic alkoxyde, a pigment, water, an alcohol, an alkali, etc. The metallic oxide is expressed by the formula: M(OR)n [M is a metallic element; OR is an alkoxyl group; (n) is an oxidation number of the metallic element], and as the metallic element, one or more kinds of Si, Zn, Ti, Al, Fe, Zr, etc., are used. Then, 0.01-20wt.% inorganic and organic pigments based on the metallic oxide are added, and subjected to hydrolysis and a polymerization reaction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cosmetic pigment and a method for producing the same, and more particularly to a cosmetic pigment having a substrate surface coated with a metal oxide gel containing a dye by a sol-gel method and a method for producing the same.

[0002]

2. Description of the Related Art Generally, white powder, foundation,
Cosmetics such as eye shadows, cheek colors, and lipsticks contain cosmetic pigments, which can produce colors of all tones.

Usually, the base material for cosmetic pigments is titanium oxide,
In addition to mineral inorganic pigments such as iron oxide, zinc oxide and ultramarine blue,
Examples include mica having a smooth surface and a white and transparent appearance, and mica titanium obtained by coating the mica with a metal oxide. Here, the metal oxide of the metal oxide-coated mica is an oxide of titanium, zirconium, aluminum, iron, chromium or the like. The metal oxide-coated mica is widely used as a so-called pearl luster pigment.

Conventionally, the pigment has been attached to the inorganic base material, but in recent years, when the pigment is coated on these inorganic base materials, the pigment is attached to the inorganic base material by a wet method using an organic binder. Alternatively, it has been proposed that silica and a dye be mixed by a mechanochemical method and the mixture be attached to an inorganic substrate.

[0005]

However, in the cosmetic pigment produced by the above method, silica is exposed everywhere because the entire surface of the pigment is not coated with silica. On the other hand, some pigments have a weak skin stimulative property by themselves, or may enhance skin irritation by a chemical action of ultraviolet rays or the like.

Therefore, if the exposed dye comes into direct contact with the skin during makeup, some people may cause a skin irritation reaction or allergic sensitization.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to provide a cosmetic pigment coated so that a dye is not exposed on the surface and a method for producing the same.

[0008]

In order to achieve the above object, the cosmetic pigment according to claim 1 comprises coating an inorganic base material having a smooth surface with a pigment-containing metal oxide gel. Characterize.

The cosmetic pigment according to claim 2 is characterized in that the surface of a spherical inorganic base material is coated with a metal oxide gel containing a pigment.

The cosmetic pigment according to claim 3 is produced by a sol-gel method from a starting solution in which the metal oxide gel according to claims 1 and 2 contains a metal alkoxide, a dye, water, an alcohol, an alkali and the like. It is characterized by

Here, the inorganic base material is titanium oxide, iron oxide,
In addition to mineral inorganic pigments such as zinc oxide and ultramarine, mica that has a smooth surface and has a white transparency, and mica titanium that is obtained by coating this with a metal oxide.

The mica generally used in cosmetics is
It is mica which is a muscovite powder, and titanium mica is mainly used as the metal oxide-coated mica.

The size of mica or metal oxide-coated mica is
About 1 μm to 100 μm, preferably 10 μm to 30 μm
m, the diameter of the spherical inorganic base material is preferably about 0.1 μm to 30 μm.

The inorganic substrate having a smooth surface is not limited to the above mica or metal oxide-coated mica, and any inorganic substrate that can be processed to obtain a smooth surface may be used. The size of the base material is preferably the same as that of the mica.

The thickness of the coating film of the metal oxide gel containing the dye is preferably 0.05 μm or more. Film thickness 0.0
If it is less than 5 μm, the dye may be exposed.

Metal alkoxides are generally M (OR) n
It is represented by (M: metallic element, OR: alkoxyl group,
n: oxidation number of metal element). A typical example of this metal alkoxide is Si (OR) 2, but S
In addition to i, Zn, Ti, Al, Fe, Zr, etc. can be used alone or in combination according to the purpose. For example, Zn or Ti may be used when high reactivity is desired, and Zr may be used when strength and alkali resistance are required to be improved.

As Si (OR) ₄ , for example, Si (O)
_{CH 3) 4, Si (OC} 2 H 5) 4, Si (iso-O
_{C 3 H 7) 4, Si} (ter-OC 4 H 9) 4, Si
(Sec-OC ₄ H ₉ ) _{4 and the} like.

As Ti (OR) ₄ , for example, Ti (O)
_{CH 3) 4, Ti (OC} 2 H 5) 4, Ti (iso-O
_{C 3 H 7) 4, Ti} (OC 4 H 9) 4 , and the like.

As Al (OR) ₃ , for example, Al (O)
_{CH 3) 3, Al (OC} 2 H 5) 3, Al (iso-O
_{C 3 H 7) 3, Al} (OC 4 H 9) 3 and the like.

As Zr (OR) ₄ , for example, Zr (O)
_{CH 3) 4, Zr (OC} 2 H 5) 4, Zr (iso-O
_{C 3 H 7) 4, Zr} (OC 4 H 9) 4 , and the like.

The alcohol as the solvent is preferably an alcohol having 1 to 5 carbon atoms, and examples thereof include methanol, ethanol, propanol, butanol and pentanol. In addition, ethylene glycol, triethanolamine, xylene or the like which dissolves a metal oxide may be used.

Examples of the alkali used as a catalyst for hydrolysis include amines such as ammonia water, ammonium hydroxide, ammonium bicarbonate, monoethanolamine and diethanolamine.

The following chemical reactions occur in the sol-gel method. Hydrolysis: M (OR) ₄ + xH ₂ O → M
(OH) x (OR) n-x + x ROH The following polymerization reaction occurs with hydrolysis.

[0024] Therefore, in the case of Si (OC H), S is first obtained by hydrolysis.
i (OH) _4, which is highly reactive Si (OH) ₄
Polymerizes to become a SiO ₂ solid with ≡Si-O-Si≡ connected.

As the pigment contained in the metal oxide gel and coated on the inorganic substrate, inorganic pigments and organic pigments which are uniformly dispersed when added to the alcohol solution containing metal alkoxide are suitable.

As the inorganic pigment, yellow iron oxide (FeO (O
H)), red iron oxide (Fe ₂ O ₃ ), black iron oxide (Fe ₂ O)
₄ ) etc., iron oxides, sulfur, aluminum silicate, ultramarine blue, zinc oxide, titanium oxide and the like.

As the organic pigments, Risoru Rubin B (Red No. 202), Lake Red CBA (Red No. 204),
Herringdon Pink CN) (Red No. 226), Bench Gin Range G (Daidai No. 204), Bent Jin Yellow G
(Yellow No. 205), Brilliant Fast Scarlet (Red No. 404), Permanent Red F5R (Red 4)
No. 05), Hansa Orange (daidai No. 401), Hansa Yellow (yellow No. 401), phthalocyanine blue (Blue No. 404), and the like.

The inorganic pigment or organic pigment is preferably 0.01 wt% to 20 wt% with respect to the metal alkoxide.
%, More preferably 3 to 10 wt%. If the addition amount is less than 0.01 wt%, the coloring effect is lost, and if it exceeds 20 wt%, the production becomes difficult.

[0029]

According to the present invention, since the pigment is included in the metal oxide gel which is the coating film, the pigment does not come into direct contact with the skin. Therefore, there is no possibility of causing skin irritation by the dye or skin irritation by a substance generated as a result of a chemical reaction between the dye and ultraviolet rays.

Further, since the pigment is encapsulated in the translucent metal oxide gel, there is almost no color change (color dullness or blemishes) due to wetting of sweat or sebum.

[0031]

EXAMPLES Next, the present invention will be specifically described with reference to Examples and Comparative Examples.

Example 1 Pigment (Bengala) 25.0 parts by weight, dispersant ("Etocel" manufactured by Dow Chemical Co., Ltd. (ethyl cellulose))
4.0 parts by weight and solvent (isopropyl alcohol) 7
1.0 part by weight was mixed and dispersed for 10 minutes using a disperser to prepare a pigment dispersion liquid.

Next, 5.2 g of tetraethoxysilane, 62.7 g of isopropyl alcohol, 1.1 g of water, 1.0 g of diethanolamine and 5.0 g of the above pigment dispersion were mixed and stirred at room temperature for 2 hours to prepare a coating liquid. (75.0
g) was obtained.

Example 2 The total amount of the coating liquid obtained in Example 1 (75.0
g) was poured into 25.0 g of mica, stirred well, and after confirming that the surface of the mica was sufficiently covered with the liquid, the temperature was gradually raised from room temperature to 60 ° C. and the whole was dried to give a colored gel layer. To form. Further raise the temperature to around 150 ° C. 1
After standing for a time, the colored gel layer was fixed to the surface of the mica to obtain red mica treated mica.

The red-silver-treated mica thus obtained was used in Examples 9, 10 and 13.

Example 3 In the same manner as in Example 1, a yellow iron oxide coating solution was prepared. Example 4 Using the coating liquid obtained in Example 3, Example 2
Mica treatment was carried out in the same manner as in, to obtain yellow iron oxide silica-treated mica.

The yellow iron oxide silica-treated mica thus obtained was applied to Examples 9, 10, 11, 12, and 13.

6.0 parts by weight of pigment (Red No. 226), 4.0 parts by weight of dispersant ("Goselan L-301" manufactured by Nippon Gosei Co., Ltd. (polyvinyl alcohol), and 90.0 parts by weight of solvent (ethyl alcohol). Parts were mixed and dispersed for 10 minutes using a disperser to prepare a pigment dispersion.

Next, 3.0 g of tetraethoxysilane, 56.0 g of ethyl alcohol, 3.0 g of water, 0.5 g of ammonium hydroxide and 12.5 g of the above pigment dispersion were mixed,
Stir at room temperature for 2 hours, coating liquid (75.0g)
I got

Example 6 The total amount of the coating liquid obtained in Example 5 (75.0
g) was poured into 25.0 g of mica titanium, and the same treatment as in Example 2 was carried out to obtain red 226 silica-treated mica titanium.

The red 226 silica-treated mica titanium thus obtained was used in Examples 12 and 13.

Example 7 A yellow No. 205 coating solution was prepared in the same manner as in Example 5.

Example 8 The total amount of the coating liquid obtained in Example 6 (75.0
g) was poured into 25.0 g of mica titanium, and the same treatment as in Example 2 was carried out to obtain yellow 205 silica-treated mica titanium.

The thus-obtained yellow # 205 silica-treated mica titanium was used in Example 11. From these results,
It has been found that the cosmetic pigments of the present invention have no skin irritation. Next, a suitable blending example of a cosmetic using the cosmetic pigment according to the present invention is shown below.

Example 9 The following 13 components were uniformly mixed to prepare 100
g was prepared.

1. Talc 78.55g 2. Magnesium stearate 3.00 g 3. Nylon powder 2.00 g 4. Silk powder 1.00g 5. Methyl polysiloxane 1.70 g 6. Squalane 0.30 g 7. Titanium oxide 3.00 g 8. Particulate titanium oxide 2.00 g 9. Red iron oxide / talc (1: 2 mixture) 0.25 g 10. Yellow iron oxide / talc (1: 2 mixture) 0.50 g 11. Black iron oxide / talc (1: 2 mixture) 0.20 g 12. Redgar silica treated mica 2.50 g 13. Yellow iron oxide silica treated mica 5.00g Total 100g

Example 10 The following 17 components were uniformly mixed to obtain a "foundation".
Was prepared. 1. Talc 31.10 g 2. Sericite 20.00 g 3. Titanium oxide 12.00 g 4. Mica titanium 1.00 g 5. Barium sulfate 5.00 g 6. Nylon powder 2.00 g 7. Silk powder 1.00g 8. Methyl polysiloxane 9.50 g 9. Squalane 0.50g 10. Octyldodecanol 3.00 g 11. Butyl paraoxybenzoate 0.20 g 12. Vitamin E 0.20 g 13. Red iron oxide / talc (1: 2 mixture) 0.50 g 14. Yellow iron oxide / talc (1: 2 mixture) 1.50 g 15. Black iron oxide / talc (1: 2 mixture) 0.50 g 16. Bengal-silica-treated mica 4.00 g 17. Yellow iron oxide silica treated mica 8.00g Total amount 100g

Example 11 The following 16 components were uniformly mixed to prepare 1 "eye shadow".
00g was prepared. 1. Talc 26.20 g 2. Polymethylmethacrylate 6.00 g 3. Collagen-treated sericite 0.30 g 4. Mica titanium 30.00 g 5. Jojoba oil 2.00 g 6. Cetyl octanoate 1.50 g 7. Methyl polysiloxane 9.00 g 8. Squalane 0.20 g 9. Diglyceryl diisostearate 2.00 g 10. Butyl paraoxybenzoate 0.10 g 11. Vitamin E 0.20 g 12. Red iron oxide / talc (1: 2 mixture) 5.00 g 13. Ultramarine / talc (1: 2 mixture) 3.00 g 14. Black iron oxide / talc (1: 2 mixture) 7.50 g 15. Red No. 226 silica-treated mica titanium 3.00 g 16. Yellow No. 205 silica-treated mica titanium 4.00g Total 100g

Example 12 The following 16 components were uniformly mixed to give 1 "cheek color".
00g was prepared. 1. Talc 43.00 g 2. Nylon powder 10.00g 3. Collagen-treated sericite 0.20 g 4. Mica titanium 5.00 g 5. Mica 8.00 g 6. Titanium oxide 1.00 g 7. Jojoba oil 2.00 g 8. Cetyl octanoate 1.50 g 9. Methyl polysiloxane 2.00 g 10. Squalane 1.00 g 11. Sericite 9.00 g 12. Butyl paraoxybenzoate 0.10 g 13. Vitamin E 0.20 g 14. Carmine / talc (1: 2 mixture) 2.00 g 15. Yellow iron oxide silica-treated mica 5.00 g 16. Red No. 226 Silica-treated mica titanium 8.00 g Total 100 g

Example 13 The following 17 components were dissolved by heating, uniformly dispersed, and then cooled to prepare 100 g of "lipstick". Carnavalou 2.00 g 2. Ceresin 10.00 g 3. Candelilla wax 7.00 g 4. Microcristan wax 2.00 g 5. Liquid lanolin 15.00 g 6. Titanium oxide 1.80 g 7. Diglyceryl triisostearate 10.00 g 8. Diisostearyl malate 17.00 g 9. Methyl polysiloxane 1.00 g 10. Squalane 1.00 g 11. Glyceryl trioctanoate 12.60 g 12. Liquid paraffin 4.00 g 13. Barium sulfate 1.00 g 14. Safflower red 0.10 g 15. Yellow iron oxide silica-treated mica 3.50 g 16. Red No. 226 silica-treated mica titanium 9.00 g 17. Bengal-silica-treated mica 3.00 g Total amount 100 g Each of the above-mentioned compounding compositions had good dispersibility, adhesion properties, and fluidity. In addition, separation and deterioration of the blended components did not occur.

[0051]

As described above, the coloring cosmetic pigment according to the present invention does not come into direct contact with the skin because the coloring matter is contained in the metal oxide gel which is the coating film. Therefore, there is no risk of skin irritation caused by the pigment or skin irritation caused by a substance resulting from a chemical reaction between the pigment and ultraviolet rays. Therefore, a highly safe cosmetic product which does not cause allergic dermatitis can be provided.

Further, since the pigment is encapsulated in the semi-transparent metal oxide gel, it is possible to obtain a natural transparent coloring that approximates the texture of the skin.

Furthermore, since the pigment is encapsulated in the metal oxide gel, the color change (color dullness, dullness, etc.
There is almost no color stain. Therefore, you can always wear makeup.

Claims (3)

[Claims] 1. A colored cosmetic pigment, characterized in that the surface of an inorganic substrate having a smooth surface is coated with a metal oxide gel containing a pigment. 2. A colored cosmetic pigment, characterized in that the surface of a spherical inorganic substrate is coated with a metal oxide gel containing a pigment. 3. The metal oxide gel according to claim 1 or 2, comprising a metal alkoxide, a dye, water, alcohol,
A colored cosmetic pigment produced by a sol-gel method from a starting solution containing an alkali or the like.