Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Liquid composition
Reexamination Certificate
2000-10-06
2002-12-03
Webb, Gregory E. (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Liquid composition
C510S136000, C510S137000, C510S421000, C510S475000, C424S401000, C424S701000
Reexamination Certificate
active
06489283
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a composition in the form of an oil-in-water emulsion containing fibers and a specific surfactant system, and to the use of the composition, for example, for caring for, treating and/or making up body or facial skin, the hair, the eyelashes and/or the lips.
2. Description of the Background
JP 07-196 440 discloses cosmetic compositions containing short polyamide fibers which give the said compositions a velvety feel and good cosmetic behavior. However, the incorporation of these polyamide fibers into oil-in-water (O/W) 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 is large.
Thus, is thus still a need for O/W emulsions containing fibers, and in particular polyamide fibers, and which have good cosmetic properties without having the drawbacks of known compositions.
SUMMARY OF THE INVENTION
The Inventor has discovered, unexpectedly, that a surfactant system comprising at least one glycerol ester of a C
8
-C
24
fatty acid and at least one polyethylene glycol ester of a C
8
-C
24
fatty acid provides a stable oil-in-water emulsions containing fibers.
Thus, the present invention provides a composition in the form of an oil-in-water emulsion comprising, in a physiologically acceptable medium, an oily phase dispersed in an aqueous phase, which contains fibers and a surfactant system comprising at least one glycerol ester of a C
8
-C
24
fatty acid and at least one polyethylene glycol ester of a C
8
-C
24
fatty acid.
The present invention also provides method of treating, protecting, caring for, removing make-up from and/or cleansing the skin, the lips and/or the hair, and/or for making up the skin, the lips, the eyelashes and/or the body, comprising applying the composition of the invention to the skin, lips, hair, eyelashes and/or body.
The present invention also provides a method of preparing the composition of Claim 1, comprising combining water, at least one oil, the fibers, and the surfactant system.
A more complete appreciation of the invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description.
DETAILED DESCRIPTION OF THE INVENTION
The term “physiologically acceptable medium” refers to a medium which is compatible with the skin, the lips, the scalp, the eyelashes, the eyes and/or the hair.
The composition obtained according to the invention is in the form of a cream (soft product as opposed to a solid product). It has good stability over time, even at a temperature above room temperature (for example 45° C.) and it has a velvety texture which feels pleasant when applied.
The fibers which can be used in the composition of the invention can be hydrophilic or hydrophobic 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. In particular, they have blunt and/or rounded ends to prevent injury.
In particular, the fibers have a length ranging from 1 nm to 20 mm, preferably from 10 nm to 5 mm and better still from 0.1 mm to 1.5 mm. These ranges for the length of the fibers include all specific values and subranges therebetween, such as 5 nm, 25 nm, 50 nm, 0.05 mm, 0.2 mm, 0.5 mm, 1 mm, 2 mm, 10 mm and 15 mm. Their cross section can be within a circle of diameter ranging from 2 nm to 100 &mgr;m, preferably ranging from 20 nm to 20 &mgr;m and better still from 5 &mgr;m to 50 &mgr;m. These ranges for the cross sections of the fibers include all specific values and subranges therebetween, such as 5 nm, 10 nm, 50 nm, 1 &mgr;m, 2 &mgr;m, 10 &mgr;m, 25 &mgr;m and 50 &mgr;m. The weight of the fibers is often given in denier or decitex.
The fibers can 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, 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.
It is also possible to use fibers used in surgery, such as resorbable synthetic fibers prepared from glycolic acid and from caprolactone (Monocryl from Johnson & Johnson), resorbable synthetic fibers such as the copolymer of lactic acid and of glycolic acid (Vicryl from Johnson & Johnson), terephthalic polyester fibers (Ethibond from Johnson & Johnson) and stainless steel threads (Steel from Johnson & Johnson).
Moreover, the fibers may or may not be surface-treated and may or may not be coated. As coated fibers which can be used in the invention, mention may be made of polyamide fibers coated with copper sulphide for an antistatic effect (for example R-STAT from Rhodia) or another polymer allowing a particular organization of the fibers (specific surface treatment) or a surface treatment which induces color/hologram effects (Lurex fiber from Sildorex, for example).
The fibers which can be used in the composition according to the invention are preferably polyamide and/or poly-p-phenylene terephthamide fibers. Their length can range from 0.1 to 5 mm, preferably from 0.25 to 1.6 mm, and their average diameter can range from 5 to 50 &mgr;m. These ranges include all specific values and subranges therebetween, as described above. 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. According to one specific embodiment of the invention, these fibers are introduced in the oily phase of the emulsion.
The fibers can be present in the composition according to the invention in an amount ranging from 0.1 to 20% by weight and preferably from 0.5 to 15% by weight relative to the total weight of the composition. These ranges include all specific values and subranges therebetween, such as 0.2, 1, 2, 5, 10 and 12% by weight relative to the total weight of the composition.
The surfactant system in the emulsion according to the invention comprises at least one glyceryl ester of a C
8
-C
24
fatty acid and at least one polyethylene glycol ester of a C
8
-C
24
fatty acid.
The glyceryl ester of a fatty acid can be obtained in particular from an acid comprising a saturated linear alkyl chain containing from 8 to 24 and preferably from 16 to 22 carbon atoms. These ranges for the number of carbon atoms include all specific values and subranges therebetween, such as 10, 12, 14, 18 and 20 carbon atoms. Glyceryl esters of a fatty acid which may be mentioned in particular are glyceryl stearate (glyceryl mono-, di- and/or tristearate), glyceryl ricinoleate and their mixtures.
The polyethylene glycol ester of a fatty acid can be obtained in particular from an acid comprising a saturated linear alkyl chain containing from 8 to 24 and preferably from 16 to 22 carbon atoms. These ranges for the number of carbon atoms include all specific values and subranges therebetween, such as 10, 12, 14, 18 and
L'Oreal
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Webb Gregory E.
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