Drug – bio-affecting and body treating compositions – Live skin colorant containing – Lip
Reexamination Certificate
2000-03-30
2003-04-15
Hartley, Michael G. (Department: 1616)
Drug, bio-affecting and body treating compositions
Live skin colorant containing
Lip
C424S401000, C424S059000, C424S076100
Reexamination Certificate
active
06548050
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a care and/or make-up composition for human skin and/or lips which has both long-lasting matte-effect properties and freshness properties. This composition is, in particular, a lipstick, an eyeliner, a face powder, an eyeshadow or a foundation, or alternatively an antisun product, a deodorant or a treating shampoo. It is preferably in the form of an anhydrous gel, a more or less thick lotion or cream, or a product cast as a stick or in a dish.
The invention also relates to the use of particles of a specific polyorganosiloxane in order to give the skin or the lips a matte effect and/or to camouflage imperfections thereof.
2. Discussion of the Background
Conventional lipstick and foundation compositions generally contain fatty substances such as oils, pasty compounds and waxes, as well as a particulate phase generally composed of fillers and pigments. The fillers generally serve to modify the texture of the composition, as well as to give a matte effect to a film of the composition that is deposited on the skin and/or the lips, while the pigments generally serve to give color to the composition.
The matte effect is particularly desired for users with combination skin or greasy skin, as well as in hot and/or humid climates. The matte-effect fillers used are usually absorbent fillers; in particular, fillers which absorb sebum and the excess oil introduced by the composition, such as talc, silica, kaolin or Nylon powder; or else fillers which have optical properties of scattering light, these properties being known as the “soft focus” effect. These fillers, however, have a tendency to dry out the skin and to emphasis the skin relief, in particular the wrinkles and pores, thus accentuating the local imperfections. In addition, absorbent fillers give the skin a somewhat unnatural powdery appearance, and they have a matte effect which is not long-lasting.
Matte-effect polymers, such as crosslinked silicone polymers known under the commercial references KSG (KSG 6, 16, 17 and 18) from the company Shin Etsu, Trefils from the company Dow Corning or Gransils from the company Grand Industrie, have been used more recently (see in particular EP-A-790 055).
The drawback of these commercial products is that they give an oily, greasy effect, without giving a fresh effect, thereby making them unsuitable or difficult to use in a hot and/or humid environment and/or for users with greasy skin. Furthermore, these commercial products, even those free of silicone oil (Trefils 505 C from Dow Corning, for example), are difficult to disperse in an aqueous medium. These products are presented as “water-insoluble” elastomeric silicone polymers (see in particular EP-A-0 855 178 from Kao).
These polymers, which are difficult to incorporate into an aqueous phase, are entirely water-repellent. On account of their high incompatibility with water and in particular with sweat, these polymers do not absorb sweat, which even has a tendency to “pearl” at the surface of the skin during perspiration. The matte-effect power of these polymers thus has a tendency to fade out over time. Furthermore, compositions that contain these polymers, such as water-in-oil or oil-in-water emulsion compositions, become destabilized over time.
Emulsions containing this type of polymer have recently been designed (cf. U.S. Pat. No. 5,421,004 from Kose and U.S. Pat. No. 5,599,533 from Estee Lauder) in order to improve their cosmetic properties. Although these emulsions introduce less grease and more freshness than anhydrous products, they lose the matte-effect property initially provided by the crosslinked silicone polymers.
Although there are crosslinked organosiloxane-type compounds that disperse in aqueous media, such as, for example, the compounds of the type, KSG 20 or KSG 21 sold by the company Shin Etsu, and whose specific chemical structure (cf. U.S. Pat. No. 5,236,986 from Shin Etsu) is responsible for this dispersion in aqueous medium (presence of polar groups giving them surfactant properties), these compounds, unlike those of the composition of the invention, provide no particular matte effect, and they are incapable of emulsifying large amounts of water (i.e. up to 70% by weight of water).
There is thus a need for a matte-effect composition, which is stable over time, whose properties on the skin persist over time, and which simultaneously provides a fresh sensation.
Moreover, when the known foundation and/or lipstick compositions are applied to the skin or the lips, they have the drawback of transferring, i.e. of becoming at least partly deposited, or by leaving marks, on certain supports with which they may come into contact, and in particular a glass, a cup, a cigarette, an item of clothing or the skin. This results in mediocre persistence of the film applied to the skin or the lips, making it necessary to freshen the application of the foundation or lipstick composition regularly. The appearance of these unacceptable marks, in particular on shirt collars, can put certain women off using this type of make-up.
Cosmeticians have been interested for several years in “transfer-resistant” lipstick and foundation compositions. Thus, the company Shiseido has envisaged, in its application JP-A-61-65809, “transfer-resistant” lipstick.compositions containing from 1 to 70% by weight of a siloxysilicate resin (with a three-dimensional network) having pendent alkyl chains of 1 to 6 carbon atoms or pendent phenyl chains, from 10 to 98% by weight of a volatile silicone oil containing a cyclic silicone chain, and pulverulent fillers. Similarly, the company Noevier has described, in JP-A-62-61911, “transfer-resistant” lipstick, eyeliner and foundation compositions containing one or more volatile silicones combined with one or more hydrocarbon-based waxes.
Although these compositions are entirely satisfactory as regards the “transfer resistance” property, they have the drawback of leaving on the skin, after the silicone oils have evaporated, a film which becomes uncomfortable over time (sensation of dryness and tautness), which puts a certain number of women off this type of make-up product. To make this type of composition more comfortable to wear, non-volatile oils could be added, but in this case the “transfer-resistance” efficacy would be lost.
More recently, the company Revlon has envisaged, in its application EP-A-602 905, “transfer-resistant” lipsticks containing a cyclic or linear volatile silicone containing pendent methyl chains and a silicone resin containing a pendent esterified chain containing from 12 to 18 carbon atoms. The film of lipstick that remains on the lips after the volatile silicone has evaporated again has the drawback of not feeling comfortable when applied and in particular of being too dry. The above company has also envisaged, in its application EP-A-709 083, “transfer-resistant” foundations containing a volatile silicone combined with a siloxysilicate resin. These foundations again have the drawback of being relatively uncomfortable and dry over time.
In addition, when the foundation or lipstick compositions, in particular the pigments in these compositions, are applied to the skin or the lips, they have a tendency to migrate over time, i.e., to travel inside the wrinkles and fine lines in the skin which surround the lips and the eyes, and to run beyond the outline of the lips, outside the initial line, resulting in an unaesthetic effect. The appearance of these marks has a tendency to put certain women off using this type of make-up.
SUMMARY OF THE INVENTION
Accordingly, one object of the present invention is to provide a care or make-up composition for human skin and lips, which makes it possible to overcome the various drawbacks mentioned above.
Another object of the present invention is to provide a composition for human skin and lips that results in a film that does not transfer.
Another object of the present invention is to provide a composition for human skin and lips that has better cosmetic properties than the “tr
George Konata M.
Hartley Michael G.
L'Oreal
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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