JP2909924B2 - Oily cosmetics with powder - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a powdery oil-based cosmetic containing a specific wax composition, which is excellent in feel and cosmetic effect and has good stability.

[Conventional technology]

2. Description of the Related Art Conventionally, oily cosmetics containing a powder such as an oily foundation, an oily eye shadow, an oily blusher, and a sunscreen stick have been prepared in a solid or paste form using a cosmetic powder and an oil as main components.

Thus, conventionally, solid oils or oils containing an oily gelling agent have been used as the oil component. However, the above-mentioned powdered oily cosmetic contains a large amount of these oil components in composition, so that it is oily. There were drawbacks such as heavy touch, oily glow, and the like.
Therefore, in order to improve this feel, attempts have been made to incorporate silicone oil as an oil component.However, silicone oil generally has poor compatibility with other oil agents, and even if a light feel can be imparted, silicone oil will not adhere. There is a problem that a feeling (fitness) is hardly obtained, and a cosmetic effect and stability are poor.

[Problems to be solved by the invention]

Therefore, the present inventor examined mixing a specific wax composition (Japanese Patent Application No. 1-324730) previously found as an oil component. Although we succeeded in obtaining a cosmetic, this still has the disadvantage that, like the above-mentioned silicone oil, a feeling of adhesion cannot be obtained, and the powder enters the texture of the skin and a uniform cosmetic film cannot be obtained. I was not spared.

[Means for solving the problem]

Under such circumstances, the present inventor has conducted intensive studies to overcome the above-mentioned disadvantages, and as a result, used a specific surface-treated powder as a cosmetic powder, and used the above-mentioned specific wax composition with the above-mentioned specific wax composition. It has been found that when combined, an oil-based cosmetic containing powder having excellent touch and cosmetic effects and good stability can be obtained, and the present invention has been completed.

That is, the present invention relates to a cosmetic comprising a cosmetic powder and an oil component as main components, and (1) at least 30% by weight of the cosmetic powder is as follows:
(C) (a) rosin and / or rosin acid ester, (b) solid oil having a melting point of 80 ° C. or more, (c) metal soap, which has been surface-treated with one or more kinds, and (2) oil component At least one type selected from the group consisting of methylpolysiloxane (meth) acrylate macromonomers having at least one (meth) acrylic group and at least three methylsiloxy groups in one molecule. By polymerizing a monomer and a mixture of one or more vinyl polymerizable monomers copolymerizable therewith with a radical generator in the presence of dimethylpolysiloxane and / or methylphenylpolysiloxane and an organic wax. And a wax composition obtained and uniformly dispersed in a low-viscosity silicone oil. .

In the present invention, any commonly used cosmetic powder can be used, for example, white pigments such as titanium oxide and zinc oxide; extenders such as talc, mica, kaolin, silica and alumina; Colored pigments such as yellow iron oxide, black iron oxide, and ultramarine blue; organic powders such as nylon, Teflon, acrylic, silk, and cellulose; tar pigments: pearlescent agents such as fish scale foil, mica titanium, iron oxide mica titanium, and bismuth oxychloride And the like.

Examples of the treating agent for treating the surface of these cosmetic powders include the following.

The rosin (a) is a solid resin obtained by removing essential oils from secretions of pine plants. The rosin acid ester is an ester of rosin or a reduced product or polymer thereof with a polyhydric alcohol such as glycerin, ethylene glycol and pentaerythritol, and examples thereof include pentaerythritol rosin acid. Examples of the solid oil (b) include carnauba wax, ceresin, microcrystalline wax, polyethylene wax, montan wax and the like. The metal soap (c) is a metal soap comprising 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. Magnesium and the like.

The surface treatment of the cosmetic powder with these treating agents is performed by a method known per se. That is, in the case of the treating agents of (a) and (b), for example, one or two or more kinds of the above-mentioned powders and one or two or more kinds of the above-mentioned treating agents dissolved or dispersed in a solvent in advance are used. After mixing and stirring to make the mixture homogeneous, the solvent is removed under reduced pressure, and if necessary, the mixture is removed by heating and dried. Known solvents can be used as the solvent, and examples thereof include alcohols such as isopropyl alcohol, esters such as ethyl acetate and butyl acetate, halogenated hydrocarbons such as chloroform and carbon tetrachloride, ketones, and chlorofluorocarbon. (C)
In the case of the treating agent, for example, a mixture of one or more of the above-mentioned powders, an alkali salt of a fatty acid of the target metal soap, and water are mixed to form a metal salt of the target metal soap. The reaction is carried out by adding a substance and allowing the treated substance to settle. The amount of the treating agent is
(A) and (b) are preferably 1 to 15% by weight, and (c) is preferably 0.1 to 10% by weight.

The oil-based cosmetic containing powder of the present invention contains about 30 to 70% by weight of a cosmetic powder in the whole composition, but in order to achieve the object of the present invention, 30% by weight of the powder is used. It is necessary that at least% by weight be treated with the treatment agent. In particular, an excellent cosmetic effect can be obtained when a white pigment such as titanium oxide and zinc oxide, an extender pigment such as talc and kaolin, a coloring pigment, and a tar pigment in the powder are surface-treated.

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

Dimethylpolysiloxane or methylphenylpolysiloxane, which is the first component of the wax composition, has the following general formula (CH ₃ ) _p · (C ₆ H ₅ ) _q SiO _{(4-pq) / 2} (wherein p and q are 1 ≦ p ≦ 3, O ≦ q ≦ 1.7, 1.5 <p
+ Q ≦ 3), and may be linear, cyclic, or branched. This component may be a mixture of two or more kinds having different molecular structures and / or different molecular weights.
Any of those having a low viscosity of not more than centistokes and those having a viscosity of about 100 centistokes can be used as appropriate according to the purpose.

The organic wax as the second component is a solid natural or synthetic organic substance, and includes animal beeswax, wool wax, vegetable carnauba wax, wood wax, petroleum montan wax, paraffin wax, petrolatum. ,
Examples include microcrystalline wax (microcrystalline wax) and synthetic polyethylene wax.

The third component of the wax composition is at least one member selected from the group consisting of a methylpolysiloxane (meth) acrylate macromonomer having one (meth) acrylate group and three or more methylsiloxy groups in the molecule. A comb-type copolymer obtained by copolymerizing a macromonomer and a mixture of one or more vinyl polymerizable monomers copolymerizable therewith. In order to obtain a composition having good stability without compatibilizing ability decreasing, the weight fraction of the methylpolysiloxane (meth) acrylate macromonomer is preferably 5 to 5%.
Preferably it is 90% by weight. Here, 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. It can be represented by the following general formula (III).

(In the formula, r represents a number of 0 to 200 representing an average degree of polymerization, s represents 0, 1 or 2, R ₃ represents a hydrogen atom or a methyl group, and R ₄ may be interrupted by an oxygen atom. Carbon number 1-6
The compound represented by the general formula (III) is described in, for example,
It can be synthesized by reacting a living polymer obtained by anionic polymerization of a cyclic siloxane disclosed in JP-A-9-126478 with a (meth) acrylate-containing chlorosilane compound. Specific examples of the compound represented by the general formula (III) include the following.

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

Examples of the vinyl polymerizable monomer copolymerizable with the methyl polysiloxane (meth) acrylate macromonomer include, for example, methyl methacrylate, ethyl methacrylate, butyl methacrylate, hexyl methacrylate, 2-ethylhexyl methacrylate, octyl methacrylate, decyl methacrylate, and dodecyl methacrylate. , Tridecyl methacrylate, octadecyl methacrylate, 2-hydroxyethyl methacrylate,
3-hydroxypropyl methacrylate, having 1 to 8 carbon atoms
Methacrylates such as methacrylates having a perfluoroalkyl group, trimethoxysilylpropyl methacrylate, and dimethoxymethylsilylpropyl methacrylate; methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, hexyl acrylate, 2-ethylhexyl acrylate, octyl acrylate, and decyl Acrylates such as acrylate, dodecyl acrylate, tridecyl acrylate, 2-hydroxyethyl acrylate, 3-hydroxypropyl acrylate and trimethoxysilyl propyl acrylate; styrene derivatives such as styrene and α-methylstyrene; vinyl acetate, vinyl propionate; Vinyl caproate, vinyl caprylate, vinyl laurate,
Vinyl esters such as vinyl versatate; methacrylic acid, acrylic acid, methacrylamide, acrylamide, maleic anhydride, acrylonitrile, butadiene and the like. These vinyl polymerizable monomers are
They can be used alone or in combination of two or more.

The wax composition (a) has a temperature equal to or higher than the melting point of the second component organic wax in the presence of the first component dimethylpolysiloxane and / or methylphenylpolysiloxane, the second component organic wax, and the radical generator. By virtue of vigorous stirring and copolymerizing a methylpolysiloxane (meth) acrylate macromonomer as a raw material of the third component and a vinyl polymerizable monomer copolymerizable therewith.

Examples of the radical generator include benzoyl peroxide,
Butyl perbenzoate, methyl ethyl ketone peroxide, dicumyl peroxide, t-butyl hydroperoxide, 2,2'-azobisisobutyronitrile, 2,2 '
-Azobisisovaleronitrile, 2,2'-azobis (2,4
-Dimethylvaleronitrile) and the like, which are used in an amount of 0.05% based on 100 parts by weight of a methylpolysiloxane (meth) acrylate macromonomer and a vinyl polymerizable monomer.
Used in the range of ~ 5.0 parts by weight.

In the polymerization reaction, the three components and the radical generator are charged into a reactor and maintained at a predetermined reaction temperature while stirring, or the first component, the second component and the radical generator are charged into the reactor and stirred. A method of dropping a mixture of a macromonomer and a vinyl polymerizable monomer, which is a raw material of the third component, while keeping the temperature at a predetermined temperature, and then ripening while maintaining the same conditions may be used. However,
In any case, it is necessary to perform strong stirring.For example, when stirring is performed by a stirring blade connected to a stirring motor on a flask scale of 5 l or less, at least 200 rpm or more, preferably 300 rpm or more. Is required. It is also preferable to use a homogenizer in order to perform strong stirring. The reaction temperature is, as described above, a temperature not lower than the melting point of the organic wax of the second component and a temperature range in which the radical generator to be used effectively acts, but is usually 50 to 200 ° C, preferably 70 to 150 ° C. The reaction is performed in 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 thus obtained to be uniformly dispersed in the low-viscosity silicone oil, the ratio of each component varies depending on the type of each component, but is preferably 45 to 80 parts by weight of dimethylpolysiloxane and / or methylphenylpolysiloxane. The siloxane organic wax is preferably in the range of 5 to 35 parts by weight and the monomer mixture in the range of 5 to 50 parts by weight.

The oil-based cosmetic containing powder of the present invention has an oil content of about
Although it contains 30 to 70% by weight, in order to obtain an excellent feel and cosmetic effect, it is necessary that at least 60% by weight of the oil component is the above wax composition. The oil component other than the wax composition is not particularly limited, but is mainly composed of a hydrocarbon oil such as petrolatum or liquid paraffin, and an oil component gelled using a gelling agent such as dextrin fatty acid ester or N-acylamino acid amide. Is preferred in terms of stability.

In addition to the essential components, water, lower alcohols, polyhydric alcohols, polymers, preservatives, antioxidants, fragrances, cosmetic ingredients, and the like can be appropriately added to the powder-containing oily cosmetic of the present invention. The preparation is carried out by a conventional method, but the heating temperature in the production process is determined in consideration of the melting point of the treating agent.
Care should be taken to run at a lower temperature.

〔Example〕

 Next, the present invention will be described in more detail 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 inlet tube, dimethylpolysiloxane having a viscosity of 6 centistokes at 25 ° C (Shin-Etsu) 300 g, microcrystalline wax (manufactured by Petrolite, trade name; product name; KF-96, 6cs, manufactured by Chemical Co., Ltd.)
Besquare 195) 120 g and t-butyl perbenzoate (trade name: Perbutyl Z, manufactured by NOF CORPORATION) 0.5 g
And the internal temperature is set to 120 in an oil bath while passing nitrogen gas through.
C., and the mixture was stirred at 600 rpm.

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 well mixed, and added dropwise through a dropping funnel over 30 minutes.

After dropping, aging was performed for 4 hours while maintaining the internal temperature and stirring state. Then replace the reflux condenser with a Claisen head,
While maintaining the internal temperature and stirring state, 2
Time stripping was performed. After completion of the stripping, the oil bath was removed, and the reaction product was cooled to room temperature with stirring to obtain 504 g of a milky white uniform cream. The obtained wax composition was uniformly dispersed in low-viscosity silicone oil and gelled.

Reference example 2 Example 1 Cream type foundation: <Production method> A. 1-3 are mixed and dissolved at 75 ° C.

B. Mix and grind 4-8.

C. Knead A and B thoroughly.

DC was melt-filled at 75 ° C. and cooled to give a cream type foundation.

<Evaluation Criteria> ：: Very good ：: Good Δ: Normal ×: Poor As shown in Table 1, both of the products 1 and 2 of the present invention have low elongation and do not feel oily. In addition, a uniform cosmetic film having an excellent fit was obtained.

On the other hand, Comparative Product 1 (having a low content of the wax composition) was generally low in evaluation, but particularly had an oily feel, making it difficult to obtain a uniform decorative film. Also, comparative products 2, 3
(No treated powder or low content) had no fit and it was difficult to obtain a uniform decorative film.

Example 2 Eye Shadow: <Production method> A.1 to 4 are mixed and dissolved at 75 ° C.

B. Mix and grind 5-7.

C. Knead A and B thoroughly.

DC was melt-filled at 75 ° C. and cooled to form an eye shadow.

<Evaluation Criteria> Same as Table 1 As shown in Table 2, each of the products 3 and 4 of the present invention has a low elongation, does not feel greasy, has a good fit, and has a good coloring. It was excellent. On the other hand, the comparative products 4 to 7 (different processed powders) have elongation,
Although good in terms of lack of oiliness, the degree of color development was poor because there was no fit and the film did not stretch uniformly.

〔The invention's effect〕

As described in detail above, according to the present invention, the powder is very excellent in feel, has a strong feeling of adhesion, has a high cosmetic effect, and has good stability, such as light elongation and no oiliness. Oil containing cosmetics are provided.

Claims (1)

(57) [Claims] 1. A cosmetic comprising a cosmetic powder and an oil component as main components, wherein (1) at least 30% by weight of the cosmetic powder is as follows:
(C) (a) rosin and / or rosin acid ester, (b) solid oil having a melting point of 80 ° C. or more, (c) metal soap, which has been surface-treated with one or more kinds, and (2) oil component At least one type selected from the group consisting of methylpolysiloxane (meth) acrylate macromonomers having at least one (meth) acrylic group and at least three methylsiloxy groups in one molecule. By polymerizing a monomer and a mixture of one or more vinyl polymerizable monomers copolymerizable therewith with a radical generator in the presence of dimethylpolysiloxane and / or methylphenylpolysiloxane and an organic wax. A wax composition which is obtained and is uniformly dispersed in a low-viscosity silicone oil.