Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Matrices
Reexamination Certificate
1998-02-27
2002-05-14
Webman, Edward J. (Department: 1617)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Matrices
C424S063000, C424S064000, C514S844000
Reexamination Certificate
active
06387405
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to cosmetic compositions. More specifically, the invention relates to cosmetic compositions comprising an organopolysiloxane elastomer and a hydrocarbon vehicle which results in a makeup cosmetic product that feels soft and powdery on the skin and is transfer resistant.
BACKGROUND OF THE INVENTION
Consumers desire makeup which they can apply smoothly and easily on their skin. They also want makeup to feel good and stay on their skin after it is applied. However, many makeup formulations that provide different types of appearances on the skin, feel less than desirable on the skin. For example, in order to achieve various “looks” that makeup can have on the skin, the makeup base is formulated with additional solids and fillers. Consequently, these makeup formulations feel greasy or oily, sticky or heavy, or drag or cake on the skin. While the makeup may provide a certain look, overall, the makeup does not feel good on the skin during and after application. To overcome this challenge, it is well known in the art to use silicone in the formula because it improves the feel of the makeup on the skin.
In recent years, there has been a strong trend toward the use of silicone fluids in makeup products. Silicones provide an elegant feel in that the makeup containing them goes onto the skin smoothly, with an excellent slip, and yet does not produce the greasy, heavy feel that non-silicone oils frequently have. Despite the excellent characteristics of silicone oil, especially that of low viscosity silicone oils which give a less sticky fresh feeling, it does not provide a fresh feeling on the skin.
Silicone oils remain attractive because of their tendency to produce a very shiny appearance on the skin. However, for certain types of cosmetic products, and/or for certain types of consumers, a significant amount of shininess is not desired. Therefore, attempts have been made using higher levels of pigment. The problem that frequently occurs is that the makeup is heavy and cakey, and does not feel good on the skin of a majority of consumers.
One type of look, for example, that certain consumers desire from their makeup is what is commonly referred to as a “matte” look. Traditionally, matte makeup has been achieved by the addition of solid powders, such as mica, silica, talc, and the like, to the formulation. In the case of silicone oil-based compositions, however, counteracting the shine produced tends to be more difficult than with more conventional cosmetic oils, thus requiring the addition of even greater amounts of solid fillers. The larger proportion of solids in a formulation, however, results in the heavy, draggy feel on the skin. Therefore, the benefit of the silicone oil is to some extent canceled.
There remains a need for base formulations which can confer a variety of appearances on the skin of the user without feeling draggy and heavy on the skin due to the necessity of using a large percentage of solids or fillers in the formulation. The present invention provides such a method, as well as non-silicone oil based formulations which are transfer resistant on the skin.
SUMMARY OF THE INVENTION
The invention relates to cosmetic compositions for topical application to the skin. Specifically, the composition comprises an organopolysiloxane elastomer dispersed in a hydrocarbon vehicle which produces a powdery feeling on the skin. The present invention also includes a method of producing a cosmetic which comprises adding to a compatible cosmetically acceptable carrier a silicone gel comprising an organopolysiloxane elastomer dispersed in a hydrocarbon vehicle.
It has been unexpectedly discovered that use of a gel base makeup formulation which includes the silicone gel combined with the compatible cosmetically acceptable carrier effectively provides a makeup product that feels velvety when applied on the skin. The resulting cosmetic compositions are also transfer resistant and appear soft, light, and attractive on the skin; the combination of the silicone gel with the compatible cosmetically acceptable carrier improves the feel and slip of makeup products.
DETAILED DESCRIPTION OF THE INVENTION
A cosmetic composition having long-lasting and unique tactile properties is provided in the present invention. The composition comprises an organopolysiloxane elastomer dispersed in a hydrocarbon vehicle. The elastomer dispersed in the hydrocarbon vehicle together form a silicone gel that is in turn, combined with a compatible cosmetically acceptable carrier to produce a cosmetic composition that possesses a characteristic soft and powdery feel on the skin and is also transfer resistant. Therefore, the present invention also includes a cosmetic composition comprising the silicone gel in combination with the compatible cosmetically acceptable carrier.
The term “hydrocarbon vehicle” as used in the present specification and claims is any cosmetically acceptable hydrocarbon oil. The hydrocarbon vehicle can be a volatile or a non-volatile hydrocarbon oil. Suitable volatile oils include straight (i.e., linear) or branched chain volatile hydrocarbon oils having from 1 to 14 carbon atoms, such as decane, dodecane, tridecane, tetradecane, and C8-20 isoparaffins; non-volatile hydrocarbons include but are not limited to isoparaffins, squalane, or petrolatum, or mixtures thereof. The hydrocarbon vehicle is present in an amount of about 5 to about 60 percent by weight of the silicone gel. In a preferred embodiment, the hydrocarbon vehicle is isododecane.
The silicone gel of the present invention is prepared by dispersing in the hydrocarbon vehicle, the organopolysiloxane elastomer. Gels of this type have been previously disclosed for use in water-in-oil emulsion products, for example in U.S. Pat. No. 5,599,533. Silicone gels:
have also been reported in anhydrous non-silicone oil-based products in U.S. Pat. No. 5,266,321. However, they have not previously been dispersed in a hydrocarbon vehicle and combined in makeup products with any compatible carrier, and the ability of such products to provide a soft powdery feel on the skin has not previously been disclosed.
Combining the gels (i.e., the elastomer and the hydrocarbon vehicle) in any compatible carrier yields a cosmetic product that feels soft and powdery on the skin and is transfer resistant. Advantageously, the gels combined with the compatible carrier permit the production of “soft-focus” and matte-finish products without feeling heavy, greasy or oily, or caking or dragging on the skin caused by the addition of solids and fillers. In a preferred embodiment of the present invention, the silicone gel is present in an amount of about 5 to about 60 percent by weight of the composition.
Specifically, the elastomer of the present invention is a reaction product of an organopolysiloxane having an unsaturated group bound to a terminal silicon atom and an organohydrogensiloxane which reaction product is at least partially cross-linked. Cross-links are junctions of polymer strands in a three-dimensional structured network. They are like long-chain branches which are so numerous that a continuous insoluble gel is formed. An elastomer is generally, a chain polymer having a degree of cross-linking sufficient to provide a gel-like substance. Such an elastomer may have a viscosity of about 100,000 to 1,000,000 cps. The elastomer can be cured by mechanisms known in the art such as addition-type or condensation-type.
The organopolysiloxane elastomers of the present invention are hetero-chain polymers. Preferred organopolysiloxane are ones which are at least partially cross-linked addition reaction products, i.e., hydrosilation products, or addition polymerization products, of an organopolysiloxane having unsaturated groups, such as vinyl or allyl, preferably bonded to at least one terminal silicon atom, and another silicone compound capable of participation in the addition reaction, such as an organohydrogenpolysiloxane. Suitable organopolysiloxane elastomers having a partial three-dimensional cross-linked structure, are descri
Ehrenberg Jeffrey
Huggins Nicole B.
Najdek Linda
Orr Carl C.
Shah Amit R.
E-L Management Corp.
Lowney, Esq. Karen A.
Price, Esq. Dorene M.
Webman Edward J.
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