JPH0495011A - Powder-containing oily cosmetic - Google Patents

Abstract

PURPOSE:To obtain the subject cosmetic, containing a prescribed amount or more of cosmetic powder having the surface treated with a specified treating agent and an oil containing a prescribed amount or more of a wax composition as principal constituent ingredients and excellent in touch and makeup effects with good stability. CONSTITUTION:A cosmetic containing cosmetic powder containing >=30wt.% cosmetic powder having the surface treated with one or more of (A) rosin and/or an ester thereof, (B) a solid oil having >=80 deg.C melting point and (C) a metallic soap and an oil containing >=60wt.% wax composition, obtained by polymerizing a mixture of methylpolysiloxane (meth)acrylate macromonomer having one (meth)acryloyl group and >=3 methylsiloxy groups in one molecule with a vinyl polymerizable monomer copolymerizable therewith in the presence of dimethylpolysiloxane and/or methylphenylpolysiloxane and an organic wax using a radical former and capable of homogeneously dispersing in a low- viscosity silicone oil as principal constituent ingredients.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a powder-containing oil-based cosmetic containing a specific wax composition, which has excellent feel and cosmetic effect, and has good stability.

[Conventional technology]

Traditionally, oil-based foundations, oil-based eye shadows,
Powder-containing oil-based cosmetics such as oil-based blushers and sunscreen sticks contain cosmetic powder and oil as main components, and are prepared in solid or paste form.

Conventionally, solid oils or oils containing oil-based gelling agents have been used as the oil component, but the powder-containing oil-based cosmetics mentioned above contain a large amount of these oil components, resulting in an oily appearance. However, it had drawbacks such as being heavy to the touch and giving off an oily shine. Therefore, in order to improve this feel, attempts have been made to blend silicone oil as an oil component, but silicone oil generally has poor compatibility with other oils, and even if it can give a light feel, it does not adhere well. There were problems in that it was difficult to obtain a good fit, and the cosmetic effect and stability were poor.

[Problem to be solved by the invention]

Therefore, the present inventor investigated the possibility of blending the specific wax composition discovered earlier (Japanese Patent Application No. 1-324730) as an oil component, and found that a powder-containing oil-based product with a light feel and good stability. Although we succeeded in obtaining a cosmetic product, this product still has the same disadvantages as the silicone oil mentioned above, such as not being able to provide a feeling of adhesion and the powder getting into the skin texture, making it impossible to obtain a uniform cosmetic film. I couldn't escape it.

[Means to solve the problem]

Under these circumstances, the inventor of the present invention conducted intensive research to overcome the above-mentioned drawbacks, and as a result, used a specific surface-treated powder as a powder for cosmetics, and combined it with the above-mentioned specific wax composition. The present invention was completed based on the discovery that a powder-containing oil-based cosmetic with excellent texture, cosmetic effect, and good stability can be obtained by combining the two.

That is, the present invention provides a cosmetic whose main components are a cosmetic powder and an oil, wherein (1) 30% by weight or more of the cosmetic powder contains the following (a) to (
c) (a) Rosin and/or rosin acid ester, etc.)
Solid oil with a melting point of 80°C or higher (c) Surface-treated with one or more metal soaps, and (2) 60% by weight or more of the oil contains one (meth) in each molecule. ) At least one macromonomer selected from the group consisting of methylpolysiloxane (meth)acrylate macromonomers having an acrylic group and three or more methylsiloxy groups, and one or more vinyl copolymerizable with these macromonomers. A wax composition obtained by polymerizing a mixture of polymerizable monomers using a radical generator in the presence of dimethylpolysiloxane and/or methylphenylpolysiloxane and an organic wax, and which is uniformly dispersed in a low-viscosity silicone oil. The present invention provides a powder-containing oil-based cosmetic characterized by the following.

In the present invention, any commonly used powder for cosmetics can be used, such as white pigments such as titanium oxide and zinc oxide; extender pigments such as talc, mica, kaolin, silica, and alumina; red iron oxide, Coloring pigments such as yellow iron oxide, black iron oxide, and ultramarine; organic powders such as nylon, Teflon, acrylic, silk, and cellulose; tar pigments; pearl agents such as fish scale foil, mica titanium, iron mica titanium oxide, and bismuth oxychloride. etc.

Treatment agents for treating the surface of these powders for cosmetics include the following.

The rosin (a) is a solid resin obtained by removing essential oil from the secretions of plants of the genus Pinus. The rosin acid ester is an ester of rosin or its reduced product or polymer and a polyhydric alcohol such as glycerin, ethylene glycol, or pentaerythritol, and includes, for example, rosin acid pentaerythritol. Examples of the solid oil (5) include carnauba wax, ceresin, microcrystalline wax, polyethylene wax, and montan wax. The metal soap (c) is a metal soap made of a metal selected from zinc, calcium, and magnesium and a fatty acid having 12 to 18 carbon atoms, such as zinc myristate, magnesium myristate, zinc laurate, zinc stearate, and stearic acid. Examples include magnesium.

Surface treatment of cosmetic powders with these treatment agents is carried out by methods known per se. That is, (a) and et al.)
In the case of a processing agent, for example, one or more of the above-mentioned powders and one or more of the above-mentioned processing agents previously dissolved or dispersed in a solvent are mixed and stirred to make a homogeneous mixture. Thereafter, the solvent is removed under reduced pressure, and if necessary, by heating, followed by drying. Known solvents can be used, such as alcohols such as isopropyl alcohol, esters such as ethyl acetate and butyl acetate, halogenated hydrocarbons such as chloroform and carbon tetrachloride, ketones, and chlorofluorocarbons.

In the case of the treatment agent (c), for example, the desired metal soap is mixed with one or a mixture of two or more of the powders, an alkali salt of a fatty acid of the desired metal soap, and water. This is done by adding a metal salt building, causing a reaction, and settling the treated product. The amount of the processing agent is 1 to 15% by weight for (a) and (c) and 0% by weight for (c) based on the powder for cosmetics.
．． 1 to 10% by weight is preferred.

The powder-containing oil-based cosmetic of the present invention contains about 30 to 70% by weight of cosmetic powder in the entire composition. It is necessary that at least % by weight be treated with the above-mentioned treatment agent. In particular, excellent cosmetic effects can be obtained when the powder is surface-treated with white pigments such as titanium oxide and zinc oxide, extender pigments such as talc and kaolin, coloring pigments, and tar pigments.

The wax composition used in the present invention was prepared as follows.

Dimethylpolysiloxane or methylphenylpolysiloxane, which is the first component constituting the wax composition, has the following general formula (% formula %) (where p and q are 1≦p≦3.0≦q≦1.7 .1.
5<p+q≦3), and may be straight, circular, or branched. In addition, this component may be a mixture of two or more types having different molecular structures and/or different molecular weights, and 1
Viscosities ranging from low viscosity below centistokes to about 100 centistokes can be used as appropriate depending on the purpose.

The second component organic wax is a solid natural or synthetic organic substance, including animal beeswax, wool wax, vegetable carnauba wax, and wood wax, as well as petroleum-based montan wax, paraffin wax, and petrolatum. , microcrystalline wax (microcrystalline wax), synthetic polyethylene wax, and the like.

The third component of the wax composition has one (meta) in the molecule.
At least one macromonomer selected from the group consisting of methylpolysiloxane (meth)acrylate macromonomers having an acrylate group and three or more methylsiloxy groups, and one or more vinyl polymers copolymerizable with these macromonomers This is a comb-shaped copolymer obtained by copolymerizing a mixture with 100% polyester. In order to obtain a composition with good stability without decreasing the compatibilizing ability, the weight fraction of the methylpolysiloxane (meth)acrylate macromonomer should be 5 to 90%.
Preferably, it is % by weight. The methylpolysiloxane (meth)acrylate macromonomer is not particularly limited as long as it has one (meth)acrylate group and three or more methylsiloxy groups in one molecule, but typical ones include It can be represented by the following general formula (III).

(In the formula, r is a number from 0 to 200 representing the average degree of polymerization, S is 0.1 or 2, R8 is a hydrogen atom or a methyl group, and R4 is the number of carbon atoms that may be interrupted by an oxygen atom. 1~
The compound represented by the general formula (III) (representing a divalent hydrocarbon group of 6) is, for example, a living polymer obtained by anionically polymerizing a cyclic siloxane disclosed in JP-A-59-126478, and a (meth)acrylate-containing compound. It can be synthesized by reaction with a chlorosilane compound. Specific examples of the compound represented by the above general formula (III) include the following.

Details below CH2=C CH.

0-C=O CH2 CH2=C-CH.

CH2 CH2=C-CH3 OC=O CH.

CH,=CC)I3 OC=O CH.

C) 12=c-CH.

C)1. =C-CH.

0-C=O CH.

CH.

CH2 Hs L CH.

CH2=[: 0=C-O CH,=CH C=0 CH,=CH 0-C=O CH2 CH2=CH C=0 CH2 CH2 CH2 CH.

CH3 CH2=CH -C H2 CH,=C-CH.

OC=O CH2 C1(2 CH2 CHa=C-CHs 0-C=O CH.

CH.

CH, Si-+OSi (cHs) s) 5CH2=
C-CH.

? 0-C=O CH2 CH2=C-CH.

〇−C=O CH2 C) 12=C-CH3 OC=O CH.

These methylpolysiloxane (meth)acrylate macromonomers can be used alone or in combination of two or more.

Furthermore, examples of vinyl polymerizable monomers copolymerizable with the methylpolysiloxane (meth)acrylate macromonomer include methyl methacrylate, ethyl methacrylate, butyl methacrylate, hexyl methacrylate, 2-ethylhexyl methacrylate, octyl methacrylate, decyl methacrylate, Dodecyl methacrylate, tridecyl methacrylate, octadecyl methacrylate, 2-hydroxyethyl methacrylate, 3
'-Hydroxypropyl methacrylate, carbon number 1-8
Methacrylic acid esters such as methacrylate, trimethoxysilylpropyl methacrylate, and dimethoxymethylsilylpropyl methacrylate having a perfluoroalkyl group; methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, hexyl acrylate, 2-ethylhexyl acrylate, octyl Acrylic acid esters such as acrylate, decyl acrylate, dodecyl acrylate, tridecyl acrylate-F12-hydroxyethyl acrylate, 3-hydroxypropyl acrylate, trimethoxysilylpropyl acrylate; Styrene derivatives such as styrene and α-methylstyrene; Vinyl acetate, Vinyl esters such as vinyl propionate, vinyl caproate, vinyl caprylate, vinyl laurate, and vinyl versatility 98: Examples include methacrylic acid, acrylic acid, methacrylic acid amide, acryl amide, maleic anhydride, acrylonitrile, and butadiene. . These vinyl polymerizable monomers can be used alone or in combination of two or more.

The wax composition of (a) is prepared in the presence of a first component of dimethylpolysiloxane and/or methylphenylpolysiloxane and a second component of an organic wax and a radical generator.
Copolymerizing the methylpolysiloxane (meth)acrylate macromonomer, which is the raw material for the third component, and a vinyl polymerizable monomer copolymerizable therewith, while stirring strongly at a temperature higher than the melting point of the organic wax, which is the second component. It is obtained by

Examples of the radical generator include benzoyl peroxide, butyl perbenzoate, methyl ethyl ketone peroxide, dicumyl peroxide, t-butyl hydroperoxide, 2.2'-azobisisobutyronitrile, 2.
Examples include 2'-azobisisovaleronitrile, 2,2'-azobis(2,4-dimethylvaleronitrile), etc., which are used in amounts based on 100 parts by weight of methylpolysiloxane (meth)acrylate macromonomer and vinyl polymerizable monomer. It is used in a range of 0.05 to 5.0 parts by weight.

The polymerization reaction can be carried out by charging the three components and the radical generator into a reactor and maintaining the reaction temperature at a predetermined temperature while stirring, or by charging the first component, the second component, and the radical generator into the reactor and stirring. A mixture of a macromonomer and a vinyl polymerizable monomer, which is a raw material for the third component, is added dropwise while maintaining the temperature at a predetermined temperature under the same conditions, and the mixture is further aged while maintaining the same conditions. However, in any case, it is necessary to stir strongly; for example, when stirring is carried out using a stirring blade connected to a stirring motor in a normal flask scale of 51 or less, it is preferably at least 20 Orpm or more. is 300 rp
A rotation speed of m or more is required. It is also preferable to use a homogenizer to perform strong stirring. As mentioned above, the reaction temperature is set at a temperature higher than the melting point of the organic wax as the second component and at which the radical generator used is effective, and is usually 50 to 200°C, preferably 70 to 15°C. React at a temperature range of [)°C. In this case, the reaction is completed in 30 minutes to 15 hours, but it is necessary to cool the reaction mixture to room temperature while continuing stirring even after the reaction is completed, and then take out the reaction composition.

In order for the wax composition obtained in this way to be uniformly dispersed in low-viscosity silicone oil, it is necessary to adjust the ratio of each component, which varies depending on the type of each component.
5-35 parts by weight monomer mixture 5
The amount is preferably in the range of 50 parts by weight.

The powder-containing oil-based cosmetic of the present invention has an oil content of about 3% in the total composition.
Although the wax composition contains 0 to 70% by weight, in order to obtain excellent texture and cosmetic effects, it is necessary that the wax composition accounts for 60% by weight or more of the oil content. In addition, oils other than the wax composition are not particularly limited, but mainly include hydrocarbon oils such as vaseline and liquid paraffin,
Oil components gelled using a gelling agent such as dextrin fatty acid ester and N-acylamino acid amide are preferred from the viewpoint of stability.

In addition to the above-mentioned essential ingredients, the powder-containing oil-based cosmetic of the present invention may appropriately contain water, lower alcohols, polyhydric alcohols, polymers, preservatives, antioxidants, fragrances, beauty ingredients, and the like. Further, the preparation is carried out by a conventional method, but the heating temperature in the manufacturing process is set to be lower than the melting point of the processing agent.

〔Example〕

Next, a more detailed explanation will be given with reference to examples.

Reference Example 1 Synthesis of wax composition: In a glass reactor equipped with a stirring blade, a thermometer, a reflux condenser, a dropping funnel, and a nitrogen gas introduction tube, dimethylpolysiloxane (having a viscosity of 6 centistokes at 25°C)
Manufactured by Shin-Etsu Chemical, product name: KF-96, 6cs) 300
G, ? Add 120 g of icrocrystalline wax (manufactured by Petrolite Co., Ltd., trade name: B'sware 195) and 0.5 g of t-butyl perbenzoate (manufactured by NOF ■, trade name: Perbutyl Z) and place in an oil bath without aerating nitrogen gas. to maintain the internal temperature at 120°C, and at 600 rpm.
Stirring was performed with

On the other hand, 50 g of methyl methacrylate, 15 g of 2-ethylhexyl acrylate, and 35 g of dimethylpolysiloxane methacrylate macromonomer represented by the following formula were mixed well and added dropwise through a dropping funnel over 30 minutes.

H3 CII2=C It was.

Reference Example 2 Preparation of treated powder: (1) Treated titanium oxide, titanium dioxide, zinc stearate, (2) Treated talc: Talc, (2) Treated 1 mica: After dropping mica, aging was carried out for 4 hours while maintaining the internal temperature and stirring state. Next, replace the reflux condenser with a Claisen head,
Stripping was performed for 2 hours under reduced pressure of 20 mm) Ig while maintaining the internal temperature and stirring state. After the stripping was completed, the oil bath was removed, and the reaction product was cooled to room temperature while stirring to obtain 504 g of a milky white and uniform creamy product. The obtained wax composition is uniformly dispersed in low viscosity silicone oil and gelled. Treatment 1 Colored Pigment 2 Colored Pigment Zinc Laurate Treatment 2 Mica: Mica ■ Treatment 3 Mica: Mica ■ Treatment 4 Mica: Mica 90 Vaseline (not solid oil) 10 ■Treatment 1 Mica titanium: Mica titanium 950 Zin ■Treatment 2 Mica titanium: Mica titanium Polyisobutylene 0 Treatment 3 Mica titanium: Mica titanium ■Treatment 2 Colored pigment: Colored pigment 90 Zinc laurate 10 ■～■, ■ and ■ are treated powders of the present invention, and ■, ■,
(2) and O are treated powders other than those of the present invention.

Example 1 Cream type foundation: Margin below <Manufacturing method> A. Mix and dissolve 1 to 3 at 75°C.

B. Mix and grind 4 to 8.

C. Thoroughly knead A and B.

D and C were melt-filled at 75°C and cooled to form a cream type foundation.

<Evaluation Criteria> ◎: Very good ○: Good △: Average ×: Bad As shown in Table 1, products 1 and 2 of the present invention both have light elongation and do not feel oily. It also had an excellent fit and provided a uniform cosmetic film.

On the other hand, Comparative Product 1 (containing a small amount of wax composition) was rated low overall, but had an oily feel and was difficult to obtain a uniform cosmetic film.

Comparative product 2.3 (which did not use treated powder or contained a small amount of powder) did not have a good fit and was difficult to obtain a uniform cosmetic film.

Example 2 Eyeshadow: Margin below Manufacturing method A. Mix and dissolve 1 to 4 at 75°C.

8. Mix and grind 5 to 7.

C. Thoroughly knead A and B.

D and C were melt-filled at 75°C and cooled to form eye shadows.

Evaluation Criteria> As shown in Table 2, which is the same as Table 1, products 3 and 4 of the present invention both spread easily, do not feel oily, have an excellent fit, and have low color development. It was excellent. On the other hand, comparative products 4 to 7 (different treated powders) showed elongation,
Although it was good in terms of lack of oiliness, the degree of color development was also poor because it did not have a fitting feeling and did not spread uniformly.

〔Effect of the invention〕

As detailed above, according to the present invention, the powder has excellent texture such as easy spreadability and no oily feeling, has a feeling of adhesion, has a high makeup effect, and has good stability. An oil-based cosmetic containing the oil is provided.

Procedural amendment (voluntary) 1. Indication of the case 1990 Patent Application No. 2N658 2. Name of the invention Powder-containing oil-based cosmetics 3. Person making the amendment Relationship to the case Applicant name: Kobayashi Kose Co., Ltd. 4, Agent Address: 1-3-6 Nihonbashi Ningyocho, Chuo-ku, Tokyo (
103) 6, “Detailed Description of the Invention” column 7 of the specification to be amended, Contents of the amendment (1) In the specification, page 5, lines 11-12 “Colored pigment,
The text "nylon" should be corrected to "coloring pigment; nylon."

(2) The chemical formulas on pages 14 to 17 of the same publication are corrected as follows.

" CH2=CH 0-C=0 CH2 CH2 CH2 CH2CH3CH3 [:H2Si-+DSi-+i'TO3i([:H3)
3CH3CH3 CH2=CH 0-C=O CH.

C)1. =C-11')I3 [1-C'=[+ CH.

CH2 CH2 ['H2=C-C)I.

DC=O CH.

CH.

CLSi-℃O3i (cH3) 3) 3CH,=C
-C113 0-C=D CH2 CH, =C-CH3 0-C=O CH, =C-CH.

0-C=O CH.

C)+2=cH ” (3) Same, page 24, line 13 It says "zinc laurate", Corrected to "zinc laurate."

(4) The same, page 29, Table 2 is corrected as follows.

Claims (1)

[Scope of Claims] 1. A cosmetic whose main components are cosmetic powder and oil, wherein (1) 30% by weight or more of the cosmetic powder contains the following (a) to (
c) (a) Rosin and/or rosin acid ester (b) Solid oil with a melting point of 80°C or higher (c) Surface treated with one or more metal soaps, and (2) Oil content 60% by weight or more of at least one macromonomer selected from the group consisting of methylpolysiloxane (meth)acrylate macromonomers having one (meth)acrylic group and three or more methylsiloxy groups in one molecule and a mixture of one or more vinyl polymerizable monomers copolymerizable with these in the presence of dimethylpolysiloxane and/or methylphenylpolysiloxane and an organic wax using a radical generator. 1. A powder-containing oil-based cosmetic comprising: a wax composition that is uniformly dispersed in a low-viscosity silicone oil;