Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Reexamination Certificate
2000-10-13
2003-01-07
Travers, Russell (Department: 1617)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
C424S078030, C514S063000, C514S762000, C514S937000
Reexamination Certificate
active
06503520
ABSTRACT:
PRIORITY
This application claims priority to French Application, FR 9912911, filed Oct. 15, 1999.
BACKGROUND OF THEE INVENTION
1. Field of the Invention
The present invention relates to a composition in the form of a water-in-oil (W/O) emulsion containing fibers, at least one silicone surfactant and at least one wax, and to the use of this composition, in particular for caring for, treating and/or making up body or facial skin, the hair, the eyelashes and/or the lips of a human.
2. Description of the Background
JP 07-196 440 describes cosmetic compositions containing short polyamide fibers which impart to the compositions a velvety feel and good cosmetic behaviour. However, the incorporation of these polyamide fibers into water-in-oil (W/O) emulsions poses problems of stability, i.e. the emulsions dephase at room temperature or at higher temperatures, and do so, in particular, when the amount of fibers contained therein is large.
Thus, a need exists for W/O emulsions containing fibers, which are stable while at the same time exhibit good cosmetic properties and thus avoid the drawbacks noted above.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide water-in-oil emulsions containing fibers, which are stable and cosmetically pleasant, i.e. soft and non-greasy, wherein a large amount of fibers can be incorporated thereinto without compromising stability and cosmetic pleasantness, including good feel and cosmetic behavior.
In particular, the present invention provides a composition in emulsion form, containing in a physiologically acceptable medium, an aqueous phase dispersed in an oily phase, which contains fibers, at least one silicone surfactant, and at least one wax.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The present invention provides a composition in emulsion form containing, in a physiologically acceptable medium, an aqueous phase dispersed in an oily phase, wherein it contains fibers, at least one silicone surfactant and at least one wax.
The expression “physiologically acceptable medium” means a medium which is compatible with the skin, the lips, the nails, the scalp and/or the hair of a mammal, particularly a human.
The composition obtained according to the present invention has good stability over time, even at temperatures above room temperature (for example 45° C.). The composition of the present invention has the appearance of a cream, i.e. supple product as opposed to a solid product, and has a velvety texture which feels pleasant when applied. This appearance and texture may be described collectively as “cosmetic pleasantness.”
The fibers which may be used in the present composition can be fibers of synthetic or natural, and inorganic or organic origin. They can be short or long, individual or organized, for example in bundles. They can have any shape, and, in particular, a circular or polygonal (square, hexagonal or octagonal) cross section depending on the specific application envisaged. However, the fibers of the present invention have blunt and/or rounded ends, and not sharp ends, to prevent injury.
In particular, the fibers of the present invention have a length ranging from 1 nm to about 20 mm, preferably from about 10 nm to 5 mm, and better still from about 0.1 mm to 1.5 mm. Their cross section can be within a circle of diameter ranging from about 2 nm to 100 &mgr;m, preferably ranging from about 20 nm to 20 &mgr;m, and better still from about 5 &mgr;m to 50 &mgr;m. The weight of the fibers may be given in denier or decitex.
The fibers of the present invention may be those used in the manufacture of textiles, and in particular silk, cotton, wool or flax fibers, cellulose fibers extracted, in particular, from wood, plants or algae, polyamide (Nylon®), rayon or viscose fibers, acetate fibers, in particular rayon acetate, cellulose acetate or silk acetate fibers, poly-p-phenylene terephthamide fibers, in particular Kevlar® fibers, acrylic fibers, in particular polymethyl methacrylate or poly-
2-
hydroxyethyl methacrylate fibers, polyolefin fibers and, in particular, polyethylene or polypropylene fibers, glass, silica or aramid fibers, carbon fibers, in particular, in graphite form, Teflon, insoluble collagen, polyester, polyvinyl chloride or polyvinylidene chloride, polyvinyl alcohol, polyacrylonitrile, chitosan, polyurethane or polyethylene phthalate fibers, fibers formed from a mixture of polymers such as those mentioned above, for instance polyamide/polyester fibers, and mixtures of these fibers.
It is also possible to use surgical fibers, such as resorbable synthetic fibers prepared from glycolic acid and from caprolactone (“Monocryl” from the company Johnson & Johnson), resorbable synthetic fibers such as the copolymer of lactic acid and of glycolic acid (“Vicryl” from the company Johnson & Johnson), terephthalic polyester fibers (“Ethibond” from the company Johnson& &Johnson) and stainless steel threads (“Steel” from the company Johnson & Johnson).
Moreover, the fibers of the present invention may be optionally surface-treated and be optionally coated. As coated fibers which can be used in the present invention, mention may be made of polyamide fibers coated with copper sulphide for an antistatic effect (for example the R-STAT fibers from the company Rhodia) or another polymer allowing a particular organization of the fibers (specific surface treatment) or a surface treatment which induces colour/hologram effects (“Lurex” fibre from the company Sildorex, for example).
The fibers which can be used in the composition according to the present invention are preferably polyamide or poly-p-phenylene terephthamide fibers. Their length can range from about 0.1 to 5 mm, preferably from about 0.25 to 1.6 mm, and their average diameter can range from about 5 to 50 &mgr;m. In particular, the polyamide fibers sold by Etablissements P. Bonte under the name Polyamide 0.9 Dtex 0.3 mm, having an average diameter of 6 &mgr;m, a weight of about 0.9 dtex and a length ranging from 0.3 mm to 1.5 mm, can be used. Poly-p-phenylene terephthamide fibers with an average diameter of 12 &mgr;m and a length of about 1.5 mm can also be used, such as those sold under the name Kevlar Floc by the company Du Pont Fibers.
The fibers can be present in the composition according to the present invention in an amount ranging from about 0.1 to 20% by weight and preferably from about 0.5 to 12% by weight relative to the total weight of the composition. Notably, the present invention enables a larger amount of fibers to be used in the composition than does JP 07-196 440.
As silicone surfactants which may form part of the composition according to the present invention, mention may be made of dimethicone copolyols and alkyldimethicone copolyols. Dimethicone copolyols which may be mentioned, for example, are the mixture of dimethicone copolyol, cyclomethicone and water (10/88/2) sold by the company Dow Coming under the name DC3225C or DC2-5225C, and the mixture of dimethicone copolyol and cyclopentasiloxane (85/15) sold under the name Abil EM-97 by the company Goldschmidt. Alkyldimethicone copolyols which may be mentioned in particular are those having an alkyl radical containing from about 10 to 22 carbon atoms, such as cetyl dimethicone copolyol, for instance the product sold under the name Abil EM-90 by the company Goldschmidt; lauryl dimethicone copolyol and, for example, the mixture of about 91% lauryl dimethicone copolyol and about 9% isostearyl alcohol, sold under the name Q2-5200 by the company Dow Corning, and mixtures of these silicone surfactants. The silicone surfactant is preferably an alkyldimethicone copolyol and in particular cetyldimethicone copolyol.
The amount of silicone surfactant(s) in the composition of the invention preferably ranges from about 0.1 to 5% by weight of active material, and more preferably from about 0.5 to 2% by weight of active material, relative to the total weight of the composition.
The composition of the present invention contains at least one wax which is usually present in the oily-phase of the emulsion.
L'Oreal
Travers Russell
Wells Lauren Q.
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