JPH11293113A - Powder-containing silicone bead - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a powder/silicone composite useful for e.g. a cosmetic raw material and having an action providing a natural finish by dispersing e.g. a powder and an alkyl(1-4C)trialkyl(1-4C)oxysiloxane in an aqueous medium and treating it with an excessive amount of base. SOLUTION: This powder/silicone composite having a three dimensional structure and particle size of 1 to 50 p m is obtained by dispersing pref. 1 to 50 wt.% (based on the whole of the composite) of powder e.g. talc or titanium dioxide and/or a dialkyl(1-4C)dialkyl(1-4C)oxysiloxane in an aqueous medium, treating it with an excessive amount of base and furthermore sequestering a free silanol group with one or more selected from the treating agents of e.g. pref. alkyl(1-4C)oxytrialkyl(1-4C)silane. It is preferable to prepare an agent for external use for skin, e.g. make-up cosmetic, containing the powder/silicone composite.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a powder / silicone composite useful as a raw material for cosmetics.

[0002]

2. Description of the Related Art Since silicones have specific physical properties, they are widely used in the field of external preparations for skin such as cosmetics. It's no exaggeration to say that it has changed.
As one of such innovative silicone materials, for example, a three-dimensional methylsiloxane structure commercially available under the trade name of Tospearl 120A (manufactured by Toshiba Silicone Co., Ltd.) or Trefil (manufactured by Toray Co., Ltd.) is used. There are polymers that have The former is a methylsiloxane network polymer obtained by the dealcoholation of an alkyltrialkoxysilane with a base, and the latter is a crosslinked dimethylpolysiloxane obtained by polymerizing a mixture of an alkyltrialkoxysilane and a dialkoxydialkylsilane by a dealcoholization reaction. It is. Since it has a translucent optical property similar to that of the skin stratum corneum, which is unmatched by other cosmetic materials, it is an important raw material for foundations aiming for a natural finish. However, even with this material, it was not enough to make the foundation look natural. The present inventors have found that this is because the effect of softening the color of the optical coloring material of the material may not be sufficiently exhibited.

[0003] On the other hand, no powder is contained in silicone beads such as the above-mentioned Tospearl 120A and trefill, and therefore, the powder has a superior optical effect to provide a natural finish. It was not known at all that it was a very useful raw material in developing makeup cosmetics. There was no idea to develop such raw materials for cosmetics.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a cosmetic material which is excellent in providing a natural finish.

[0005]

SUMMARY OF THE INVENTION In view of such circumstances, the present inventors have made intensive research efforts in search of a cosmetic material having an excellent action of providing a natural finish, and as a result, blocked powder and free silanol groups. The inventors have found such properties in a powder / silicone composite comprising a polymer having a three-dimensional structure of an alkyl (C1-4) siloxane which may be used, and have completed the invention. Hereinafter, the present invention will be described in detail focusing on embodiments.

(1) Powder / Silicone Composite of the Present Invention The powder / silicone composite of the present invention comprises a powder and a silicone resin. Here, as the powder preferred for the powder-silicone composite of the present invention, there is no particular limitation as long as it is a powder used in cosmetics. For example, talc, titanium dioxide, iron oxide (black iron oxide) , Red iron oxide, yellow iron oxide, etc.), chromium oxide, chromium oxyhydroxide, zinc oxide, zirconium oxide, lithium cobalt titanate, dark blue, ultramarine, anhydrous silicic acid, calcium silicate, magnesium silicate, kaolin, sericite, mica, titanium cell Site, titanium mica, calcium carbonate, acrylic resin beads, nylon powder, polyethylene powder, red 106
No. 1, Red No. 201, Red No. 202, Red No. 226, Yellow No. 4 aluminum lake, Yellow No. 406, Blue No. 404, etc., and preferably one or more types. The preferred content of these powders in the composite of the present invention is 0.1 to 70% by weight, more preferably,
1 to 60% by weight.

As the preferred silicone for the powder / silicone composite of the present invention, any silicone powder commonly used in cosmetics can be used without any particular limitation. Alkyl (C1-4)
A polymer having a three-dimensional structure of methylsiloxane, which is obtained by polymerizing or copolymerizing oxysiloxane or dialkyl (C1-4) dialkyl (C1-4) oxysiloxane, is particularly preferable. This is because the optical properties of this are similar to those of the stratum corneum. The preferred content of silicone in the powder / silicone composite of the present invention is from 30 to
The content is 99.9% by weight, more preferably 40 to 99% by weight. Incidentally, the alkyl group or the alkoxy group of the silicone preferably has 1 to 4 carbon atoms, more preferably 1 methyl group or 1 methoxy group. This is because such a balance between organic properties and inorganic properties is preferable in the presence of inorganic powder and the like. Further, the ratio of the alkyl trialkoxy silane to the dialkoxy dialkyl silane should be at least 10
%, More preferably 20% by weight.

In the powder / silicone composite of the present invention, raw materials usually used in cosmetics other than the above-mentioned powder and silicone are arbitrarily contained as long as the effects of the present invention are not impaired. Can be. Such optional components include, for example, hydrocarbons such as petrolatum and microcrystalline wax, esters such as jojoba oil and gay wax,
Triglycerides such as beef tallow and olive oil, higher alcohols such as cetanol and oleyl alcohol, fatty acids such as stearic acid and oleic acid, glycerin and 1,3-
Examples include polyhydric alcohols such as butanediol, preservatives, ultraviolet absorbers, and antioxidants. The content of these optional components is preferably controlled to 5% by weight or less based on the total amount of the composite. This is because if the amount is too large, the effect of the invention may be impaired.

The powder / silicone composite of the present invention can be manufactured as follows. In other words, after coexisting the pre-produced silicone beads and powder, a strong physical stimulus such as kneading with a planetary ball mill is applied,
The method of embedding using the hardness difference between silicone and powder,
For example, a method of embedding a powder in coexistence when producing by polymerization of silicone can be exemplified. The latter is preferred because of the completeness of the embedding. For example, in the embedding method at the time of this polymerization, a method in which an alkyl (C1-4) trialkyl (C1-4) oxysilane or the like is added to a powder together with a base such as aqueous ammonia in the presence of a dispersant or a surfactant, and the polymerization is performed Can be exemplified. When producing by such an emulsification method, preferred raw materials include:
In addition to alkyl (C1-4) trialkyl (C1-4) oxysilane, dialkyl (C1-4) dialkyl (C1-4) oxysilane and the like can be used.
By adjusting this ratio, it is also possible to adjust the number of crosslinks and control physical properties such as elasticity of the resin. The powder-silicone composite thus obtained can be further subjected to a surface treatment, such as treatment with a silane coupling agent, treatment with hydrogen methyl polysiloxane, treatment with metal soap, Examples thereof include a treatment with a fluoroalkyl phosphoric acid diethanolamine salt and a treatment with an acyl amino acid salt.

(2) External preparation for skin of the present invention The external preparation for skin of the present invention is characterized by containing the above-mentioned powder / silicone complex. The external preparation for skin referred to in the present invention means a general term for preparations directly administered on the skin such as cosmetics and external medicine for skin. Particularly preferred among the skin external preparations of the present invention are makeup cosmetics such as foundations, and among them, base makeup cosmetics are particularly preferred. This is because the natural finish characteristics of the powder / silicone composite of the present invention can be utilized. In the skin external preparation of the present invention, the preferable content of the powder / silicone complex is 1 to 70% by weight, more preferably 5 to 60% by weight, based on the total amount of the cosmetic. is there. This is because if the amount is too large, the makeup function may be impaired, and if the amount is too small, the effect of creating a natural finish may not be obtained. The external preparation for skin of the present invention may contain, in addition to the above-mentioned powder / silicone complex, optional components usually used in external preparations for skin. Such optional components include, for example, hydrocarbons such as petrolatum and microcrystalline wax,
Esters such as jojoba oil and gay wax, triglycerides such as tallow, olive oil, higher alcohols such as cetanol and oleyl alcohol, fatty acids such as stearic acid and oleic acid, and polyhydric alcohols such as glycerin and 1,3-butanediol. , Nonionic surfactants, anionic surfactants, cationic surfactants, amphoteric surfactants, thickeners such as ethanol and carbopol, preservatives, ultraviolet absorbers, antioxidants, pigments, powders, etc. Can be illustrated. Particularly preferred among these are, for example, Tospearl 120A
It is a polymer having a three-dimensional structure of methylsiloxane, such as (Toshiba Silicone Co., Ltd.) and Trefill (Toray Co., Ltd.).

[0011]

EXAMPLES The present invention will be described in more detail with reference to examples, but it is needless to say that the present invention is not limited only to such examples.

Example 1 Production Example 1 90 parts by weight of Tospearl 120A and 10 parts by weight of titanium dioxide were charged in a planetary ball mill and mixed for 24 hours to obtain a powder / silicone composite 1.

Example 2 Production Example 2 90 parts by weight of Tospearl 120A, 9 parts by weight of trefill, and 1 part by weight of Yellow No. 401 were charged into a planetary ball mill, and
After mixing for 4 hours, a powder / silicone composite 2 was obtained.

Example 3 Production Example 3 270 parts by weight of dimethoxydimethylsilane and 10 parts by weight of titanium dioxide were mixed in a mixture of 5000 parts by weight of water, 1 part by weight of sodium lauryl sulfate and 5 parts by weight of sodium metaphosphate. Disperse and add 1N ammonia water 1000
Of a polymer having a three-dimensional structure of methylsiloxane, and 11 parts by weight of titanium dioxide contained in 89 parts by weight of a polymer having a three-dimensional structure of methylsiloxane.
I got

Example 4 Production Example 4 270 parts by weight of methyltrimethoxysilane and yellow iron oxide 1
0 parts by weight is dispersed in a mixed solution of 5000 parts by weight of water, 1 part by weight of sodium lauryl sulfate and 5 parts by weight of sodium metaphosphate, and 1000 parts by weight of 1N ammonia water is added thereto and reacted for 1 hour. Then, the mixture was filtered and washed with water to obtain a powder / silicone complex 4 in which 92 parts by weight of a polymer having a three-dimensional structure of methylsiloxane contained 8 parts by weight of yellow iron oxide.

Example 5 Production Example 5 200 parts by weight of methyltrimethoxysilane, 70 parts by weight of dimethoxydimethylsilane, and 10 parts by weight of bengara were mixed with 500 parts by weight.
0 parts by weight of water, 1 part by weight of sodium lauryl sulfate and 5 parts by weight
The mixture was dispersed in a mixed solution of sodium metaphosphate in parts by weight, 1000 parts by weight of 1N aqueous ammonia was added thereto, reacted for 1 hour, filtered and washed with water, and 9 parts by weight of a polymer having methylsiloxane three-dimensional structure was added to bengara. A powder / silicone composite 5 containing 1 part by weight was obtained.

Example 6 Production Example 6 210 parts by weight of methyltrimethoxysilane and sericite 3
0 parts by weight is dispersed in a mixed solution of 5000 parts by weight of water, 1 part by weight of sodium lauryl sulfate and 5 parts by weight of sodium metaphosphate, and 1000 parts by weight of 1N ammonia water is added thereto and reacted for 1 hour. Then, the mixture was filtered and washed with water to obtain a powder / silicone composite 6 in which 32 parts by weight of sericite was included in 68 parts by weight of a polymer having a three-dimensional structure of methylsiloxane.

<Example 7> Production Example 7 210 parts by weight of dimethoxydimethylsilane and multiple beads (produced by Sekiyu Kasei Co., Ltd., powder of 85% spherical silicic acid anhydride coated with 10% titanium dioxide and further coated with 5% silicic anhydride) 30 parts by weight are dispersed in a mixture of 5000 parts by weight of water, 1 part by weight of sodium lauryl sulfate and 5 parts by weight of sodium metaphosphate, and 1N aqueous ammonia is added thereto.
After adding 000 parts by weight, the mixture was reacted for 1 hour, and filtered and washed with water to obtain a powder / silicone composite 7 in which 29 parts by weight of multiple beads were contained in 71 parts by weight of a polymer having a three-dimensional structure of methylsiloxane.

Example 8 Production Example 8 300 parts by weight of dimethoxydimethylsilane and 1 part by weight of Red No. 226 were dispersed in a mixed solution of 5000 parts by weight of water and 1 part by weight of sodium lauryl sulfate, and 1 part of Add 1000 parts by weight of specified ammonia water and react for 1 hour,
Filtered and washed with water, powder containing 1 part by weight of Red No. 226 in 99 parts by weight of a polymer having methylsiloxane three-dimensional structure.
Silicone composite 8 was obtained.

Example 9 A foundation, which is an external preparation for skin of the present invention, was prepared according to the following formulation.
That is, after mixing the components of A with a Henschel mixer,
The mixture was pulverized with a pulverizer equipped with a 0.9 mm round-hole screen, and sprayed with a component (b) while mixing with a Henschel mixer to coat. This was pulverized by a pulverizer equipped with a 1 mm herringbone screen, packed in a gold plate and molded under pressure to obtain Foundation 1. B. Powder / silicone composite 1 40 parts by weight Silicone-treated sericite 20 parts by weight Silicone-treated yellow iron oxide 5 parts by weight Silicone-treated bengala 1 part by weight Multiple beads (manufactured by Catalyst Chemicals Co., Ltd.) 10 parts by weight Tospearl 120A (Toshiba Silicone Co., Ltd.) 14 parts by weight Ro dimethicone 100 centistokes 10 parts by weight

Example 10 A foundation, a skin external preparation of the present invention, was prepared according to the following formulation. That is, after the component (a) was mixed with a Henschel mixer, the mixture was pulverized with a pulverizer equipped with a 0.9 mm round hole screen, and the component (b) was sprayed and coated while mixing with a Henschel mixer. This was pulverized by a pulverizer equipped with a 1 mm herringbone screen, filled in a metal plate and pressed to obtain a foundation 2. B Powder / silicone composite 3 40 parts by weight Silicone-treated sericite 20 parts by weight Silicone-treated yellow iron oxide 5 parts by weight Silicone-treated bengala 1 part by weight Multiple beads (manufactured by Toshiba Chemical Co., Ltd.) 10 parts by weight Trefil (manufactured by Toray Industries, Ltd.) 14 parts by weight 100 cm Stokes of dimethicone 10 parts by weight

<Example 11> The foundation 1 and the foundation 2 were evaluated for their whiteness and natural finish. Control product 1 was prepared by mixing the powder / silicone composite with titanium dioxide and Tospearl 120A at 1:
The control product 2 was prepared by simply mixing the powder / silicone composite with titanium dioxide and trefil at a ratio of 1: 9 using a Henschel mixer. The evaluation was made by one group of panelists arbitrarily collected.
Ask the name to use the control product for the first week,
For the week, use the product of the example, and in the last week, arbitrarily compare and use the control product and the product of the example. Request a 3-week use test, and let them know the evaluation result by questionnaire. Was. Evaluation criteria: ++: markedly better than control product, +: clearer than control product, ±: not much changed,-: control product better, natural whiteness and finish I got the answer. Table 1 shows the results. From this, the foundation, which is an external preparation for the skin of the present invention, suppresses the whiteness and provides a natural finish, and as the powder / silicone composite of the present invention,
It can be seen that those manufactured by dispersion and polymerization are more preferable in physical properties than those manufactured by mechanochemical.

[0023]

[Table 1]

<Example 12> A foundation, a skin external preparation of the present invention, was prepared according to the following formulation. That is, after the component (a) was mixed with a Henschel mixer, the mixture was pulverized with a pulverizer equipped with a 0.9 mm round hole screen, and the component (b) was sprayed and coated while mixing with a Henschel mixer. This was pulverized by a pulverizer equipped with a 1 mm herringbone screen, packed in a gold plate and pressed to obtain a foundation 3. According to the evaluation by a specialized panelist, excellent whiteness was suppressed and natural finish was recognized. (A) Powder / silicone composite 3 30 parts by weight Powder / silicone composite 6 20 parts by weight Powder / silicone composite 4 5 parts by weight Powder / silicone composite 51 1 part by weight Multiple beads (manufactured by Catalyst Kasei Co., Ltd.) 20 parts by weight Tospearl 120A (manufactured by Toshiba Silicone Co., Ltd.) 14 parts by weight Logimethicone 100 centistokes 10 parts by weight

Example 13 A foundation, a skin external preparation of the present invention, was prepared according to the following formulation. That is, after the component (a) was mixed with a Henschel mixer, the mixture was pulverized with a pulverizer equipped with a 0.9 mm round hole screen, and the component (b) was sprayed and coated while mixing with a Henschel mixer. This was pulverized by a pulverizer equipped with a 1 mm herringbone screen, packed in a gold plate and pressed to obtain a foundation 3. According to the evaluation by a specialized panelist, excellent whiteness was suppressed and natural finish was recognized. B. Powder / silicone composite 3 30 parts by weight Silicone-treated sericite 20 parts by weight Powder / silicone composite 25 5 parts by weight Powder / silicone composite 8 1 part by weight Powder / silicone composite 7 20 parts by weight Trefill ( 14 parts by weight Ro dimethicone 100 centistokes 10 parts by weight

Example 14 An antiviral agent, which is a skin external preparation of the present invention, was prepared according to the following formulation. That is, after mixing the components of (a) with a Henschel mixer, the components were mixed at 0.1.
The mixture was pulverized with a pulverizer equipped with a 9 mm round-hole screen, and sprayed with a component (b) while mixing with a Henschel mixer to coat. This was pulverized by a pulverizer equipped with a 1 mm herringbone screen, packed in a gold plate and pressed to obtain an antiviral agent. This is I
It was excellent in suppressing the inflammation around the mouth due to herpes simplex, and also excellent in hiding the rough skin caused by inflammation. B. Powder / silicone composite 3 30 parts by weight Silicone-treated sericite 20 parts by weight Powder / silicone composite 25 5 parts by weight Powder / silicone composite 8 1 part by weight Powder / silicone composite 7 20 parts by weight Trefill ( 13 parts by weight Sorivudine 1 part by weight Rodimethicone 100 centistokes 10 parts by weight

Example 15 A steroid, which is an external preparation for skin of the present invention, was prepared according to the following formulation. That is, after mixing the components of (a) with a Henschel mixer, the components were mixed at 0.1.
The mixture was pulverized with a pulverizer equipped with a 9 mm round-hole screen, and sprayed with a component (b) while mixing with a Henschel mixer to coat. This was pulverized with a pulverizer equipped with a 1 mm herringbone screen, packed in a gold plate and molded under pressure to obtain a steroid. This product was excellent in suppressing inflammation and also excellent in hiding the rough skin caused by inflammation. A powder / silicone composite 3 30 parts by weight Silicone-treated sericite 20 parts by weight Powder / silicone composite 25 5 parts by weight Powder / silicone composite 8 1 part by weight Powder / silicone composite 7 20 parts by weight Tospearl 120A (Manufactured by Toshiba Silicone Co., Ltd.) 13 parts by weight Hydrocortisol 1 part by weight Rodimethicone 100 centistokes 10 parts by weight

[0028]

According to the present invention, it is possible to provide a cosmetic material having an excellent action of providing a natural finish.

Claims (9)

[Claims] 1. A powder / silicone composite comprising a powder and a polymer having a three-dimensional structure of an alkyl (C1-4) siloxane which may be blocked with a free silanol group. 2. The powder / silicone composite according to claim 1, wherein the particle size is 1 to 50 μm. 3. The content of the powder is 1 to the total amount of the composite.
The composite according to claim 1, wherein the amount is from about 50% by weight to about 50% by weight. 4. A powder and an alkyl (C1-4) trialkyl (C1-4) oxysiloxane and / or a dialkyl (C1-4) dialkyl (C1-4) oxysiloxane dispersed in an aqueous carrier, The method for producing a complex according to any one of claims 1 to 3, wherein the complex is treated with a base. 5. The production method according to claim 4, wherein one or more kinds of the treatment agents shown in the following (a) are used to block free silanol groups. A) alkyl (C1-4) oxytrialkyl (C1
4) silane, halogenotrialkyl (C1-4) silane, hydrogen alkyl (C1-4) polysiloxane, fatty acid (C10-24), higher alcohol (C1
4), alkoxy (C1-4) dialkyl (C1-4)
Perfluoroalkyl (C3-12) silane 6. A powder and an alkyl (C1-4) trialkyl (C1-4) oxysiloxane and / or a dialkyl (C1-4) dialkyl (C1-4) oxysiloxane are dispersed in an aqueous carrier, and excess Powder / silicone composite obtained by treatment with a base. 7. The powder / silicone composite according to claim 6, which is further treated with one or more kinds selected from the following treatment agents. 8. An external preparation for skin containing the powder / silicone complex according to any one of claims 1 to 3 and 6 to 7. 9. The external preparation for skin according to claim 8, which is a makeup cosmetic.