Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Reexamination Certificate
2000-07-07
2002-12-10
Hartley, Michael G. (Department: 1617)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
C424S061000, C424S063000, C424S070700
Reexamination Certificate
active
06491931
ABSTRACT:
The present invention relates to a process for making up or caring for keratinous fibers, comprising applying to the fibers a composition comprising fibers and an aqueous dispersion of at least one film forming polymer. The invention also relates to a make-up or care composition for keratin fibers, wherein the composition comprises fibers, an aqueous dispersion of at least one film forming polymer, and at least one wax. Specifically, the invention relates to the use of this composition for making up substantially longilinear keratin fibres of human beings, such as eyelashes, eyebrows, and hair, as well as for artificial eyelashes and wigs. More specifically, the invention relates to a mascara composition.
It is known, for example in document JP-A-3 153 613, the disclosure of which is specifically incorporated by reference herein, to use fibers in mascara compositions in order to give a lengthening and thickening effect to the eyelashes. Documents JP-A-57 158 714 and JP-9-263 518, the disclosures of which are specifically incorporated by reference herein, describe mascara compositions comprising fibers and polymers in aqueous dispersion of acrylic type. However, the make-up composition obtained is not resistant to water, such as, for example, during bathing or when taking showers, and is not resistant to tears and/or to perspiration. The make-up compositions thus do not have good staying power over time.
An aim of the present invention, therefore, is to propose a make-up composition for keratin fibers, such as the eyelashes, which has at least one of the following properties: good staying power over time, resistance to water, in particular while rubbing, and, at the same time, imparts good lengthening properties to the eyelashes.
The inventors have discovered, surprisingly, that the use of a polyurethane dispersion combined with fibers makes it possible to make an aqueous composition water-resistant, whereas previously, so-called “waterproof” mascaras were anhydrous compositions. Further, at least some embodiments of the make-up composition according to the invention have good cosmetic properties, adhere well to the eyelashes and coat them without forming blobs. In addition to being water-resistant, the make-up composition of at least some embodiments does not “crumble” by the end of the day.
Thus, a subject of the invention is a process for making up or caring for keratin fibers, comprising applying to the keratin fibers a composition comprising, in a physiologically acceptable medium, fibers and at least one film-forming polymer in the form of particles in aqueous dispersion, wherein the film-forming polymer is a polyurethane. Another subject of the invention is a cosmetic composition comprising, in a physiologically acceptable medium, fibers, at least one film-forming polymer in the form of particles in aqueous dispersion, and at least one wax, wherein the film-forming polymer is a polyurethane. Another subject of the invention is a process for forming at least one film of fibers and a polyurethane polymer in the form of particles in aqueous dispersion on keratin fibers, comprising applying to the keratin fibers a make-up or care composition according to the invention, wherein the film is transfer-resistant to at least one of water, tears, and perspiration when the keratin fibers are exposed thereto.
The fibers which can be used in the composition of the invention can be fibers of synthetic, natural, mineral, and organic origin. They can be short or long, hollow or solid, individual or organized, such as, for example, like plaits or braids, and any combination thereof. They can be in any shape, and, for example, of circular or polygonal cross section, such as square, hexagonal, or octagonal, depending on the specific application envisaged. Further, their ends can be blunt and/or smooth to prevent injury.
The fibers can generally have a length, in one embodiment, ranging from 0.1 mm to 10 mm, in another embodiment ranging from 1 mm to 5 mm, and in another embodiment ranging from 1 mm to 3.5 mm. Their cross section can be included in a circle of diameter ranging from 500 nm to 500 &mgr;m in one embodiment, in another embodiment in a circle of diameter ranging from 10 nm to 100 &mgr;m, and in another embodiment in a circle of diameter ranging from ranging from 20 &mgr;m to 50 &mgr;m. The weight of the fibers is often given in denier or decitex.
The fibers which can be used according to the invention can be those used in the manufacture of textiles, such as, for example, silk fibers, cotton fibers, wool fibers, or flax fibers, cellulose fibers (or Rayon), such as, for example, extracted fibers such as fibers from wood, plants, or algae, polyamide (Nylon®) fibers, viscose fibers, acetate fibers, such as, for example, rayon acetate fibers, poly(p-phenyleneterephthalamide) (or aramide) fibers, such as, for example, Kevlar®, acrylic polymer fibers, such as, for example, polymethyl methacrylate or poly(2-hydroxyethyl methacrylate) fibers, polyolefin fibers, such as, for example, polyethylene or polypropylene fibers, silica fibers, carbon fibers, such as, for example, in graphite form, polytetrafluoroethylene fibers (such as Teflon®), insoluble collagen fibers, polyester fibers, polyvinyl chloride fibers, polyvinylidene chloride fibers, polyvinyl alcohol fibers, polyacrylonitrile fibers, chitosan fibers, polyurethane fibers, polyethylene phthalate fibers, fibers formed from a mixture of polymers such as those mentioned above, such as, for example, polyamide/polyester fibers, and mixtures of different fibers.
Moreover, the fibers can be surface-treated or untreated, and can be coated or uncoated. Coated fibers which can be useful according to the invention can be, for example, polyamide fibers coated with copper sulphide for an antistatic effect, such as, for example R-STAT from Rhodia, or fibers coated with another polymer to facilitate the specific organization of the fibers (specific surface treatment), or fibers with a surface treatment which induces color and/or hologram effects, such as, for example, Lurex fiber from Sildorex.
In one embodiment, fibers of synthetic origin can be used, for example, organic fibers, such as those used in surgery. For example, water-insoluble fibers can be used. The fibers which can be used according to the invention are generally polyamide or cellulose fibers. They can generally range in length, in one embodiment, from 0.1 mm to 5 mm, and in another embodiment from 0.25 mm to 1.6 mm, and their average diameter can generally range from 5 &mgr;m to 50 &mgr;m. For example, the polyamide fibers sold by the company 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 decitex, and a length ranging from 0.3 mm to 1.5 mm, can be used. Poly-p-phenylene terephthalamide 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 DuPont Fibers. Cellulose (or Rayon) fibers having an average diameter of 50 &mgr;m and a length ranging from 0.5 mm to 6 mm, such as those sold under the name Natural rayon flock fiber RC1BE-N003-M04 by the company Claremont Flock can also be used. Polyethylene fibers can also be used, such as those sold under the name Shurt Stuff 13 099 F by the company Mini Fibers.
The fibers can be present in the composition according to the invention, in one embodiment, in an amount generally ranging from 0.1% to 10% by weight, relative to the total weight of the composition, and in another embodiment from 0.3% to 5% by weight.
In the present application, the expression “film-forming polymer” means a polymer which is capable, by itself or in the presence of a film-forming auxiliary agent, of forming an isolable film. The expression “polymer in the form of particles in aqueous dispersion,” generally known as a latex or pseudolatex, means a phase containing water and, optionally, a compound which is soluble in water, in which the polymer is dispersed directly in the form of particles.
The polyuretha
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Hartley Michael G.
L'Oreal (S.A.)
Willis Michael A.
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