Drug – bio-affecting and body treating compositions – Live skin colorant containing
Reexamination Certificate
2000-01-05
2001-12-04
Page, Thurman K. (Department: 1615)
Drug, bio-affecting and body treating compositions
Live skin colorant containing
C424S401000, C424S064000, C424S059000
Reexamination Certificate
active
06325994
ABSTRACT:
The present invention relates to a composition containing at least one styrene/acrylate copolymer, which is intended in particular for the cosmetics, dermatological, pharmaceutical and hygiene fields. More specifically, the invention relates to a composition for caring for or making up the skin, including the lips, or alternatively superficial keratinous body growths, such as the eyelashes, the eyebrows, the hair and the nails.
This composition can be in the form of a mascara, an eyeliner, a product for the lips, a face powder, an eyeshadow, a foundation, a make-up product for the body, a concealer product, an antisun composition, a skin-coloring composition or a skincare product.
Products for making up or caring for the human skin or lips, such as eyeliners, foundations or lipsticks, or alternatively for the eyelashes, such as mascaras, generally contain fatty substances, such as waxes and oils, pigments and/or fillers and, optionally, additives such as cosmetic or dermatological active agents. When these compositions are applied to the skin or the eyelashes, they leave a film on them which does not always have good water-resistance, during bathing or taking a shower, for example, and/or resistance to tears, to perspiration or to sebum, and/or to rubbing with the fingers or against clothes. The film is thus made brittle and the make-up effect resultantly does not have good staying power over time.
Moreover, these compositions also have the drawback of transferring, i.e., of becoming at least partly deposited, leaving marks on certain supports with which they may come into contact, in particular a glass, a cup, a cigarette, an item of clothing or the skin. This results in mediocre persistence of the film applied, making it necessary to freshen the application of the make-up composition regularly. Moreover, the appearance of unacceptable marks, in particular on shirt collars, may dissuade some women from using this type of make-up.
One object of the present invention is to develop a composition which does not have the above drawbacks and which leads to the formation of a film which has good staying power and is resistant to water.
The inventors have discovered, entirely surprisingly, that the use of a specific styrene/acrylate copolymer in a cosmetic, dermatological, pharmaceutical or hygiene composition can make it possible to obtain a film which has very good staying power and good transfer-resistant properties. The film obtained is resistant in particular to water, to rubbing, for example with the fingers or against clothing, to perspiration and to sebum. The film is also supple, flexible, shiny and non-sticky.
More specifically, a subject of the present invention is a composition for topical application comprising, in a cosmetically, dermatologically, hygienically or pharmaceutically acceptable support, at least one fatty phase and at least one lipophilic polymer, characterized in that the lipophilic polymer is a tert-butylstyrene/C
1
-C
10
alkyl methacrylate/C
1
-C
10
alkyl acrylate copolymer.
Another subject of the invention is the use, in a cosmetic, dermatological or hygiene composition or for the manufacture of a pharmaceutical composition for topical application, of at least one tert-butylstyrene/C
1
-C
10
alkyl methacrylate/C
1
-C
10
alkyl acrylate copolymer to obtain a film which has good staying power and/or which is resistant to water, to rubbing, to perspiration and/or to sebum, and/or which has transfer-resistance properties, whereas the composition comprises at least one fatty phase.
A subject of the invention is also a cosmetic process for making up or for non-therapeutically treating the skin or superficial keratinous body growths, which includes applying thereto a composition as described above.
The expression “lipophilic polymer” means a polymer which can be dissolved and/or dispersed in the fatty phase of the composition.
Preferably, the lipophilic polymer is a copolymer of tert-butylstyrene/C
1
-C
10
alkyl methacrylate/C
1
-C
10
alkyl acrylate and of a vinylaromatic monomer other than tert-butylstyrene.
Advantageously, the lipophilic polymer can be a copolymer derived from the polymerization of:
a) 10 to 55% by weight, relative to the total weight of monomers, of para-tert-butylstyrene,
b) 20 to 80% by weight of C
1
-C
10
alkyl methacrylate monomer,
c) 2 to 25% by weight of C
1
-C
10
alkyl acrylate monomer,
d) from 0 to 40% by weight of vinylaromatic monomer other than para-tert-butylstyrene.
The alkyl group of the C
1
-C
10
alkyl methacrylate monomer can be linear or branched and preferably contains from 1 to 4 carbon atoms, and more preferably contains 4 carbon atoms. C
1
-C
10
alkyl methacrylates which may be mentioned, for example, are methyl methacrylate, ethyl methacrylate, propyl methacrylate, isobutyl methacrylate and n-butyl methacrylate. The methacrylate monomer which is particularly preferred is isobutyl methacrylate.
The alkyl group of the C
1
-C
10
alkyl acrylate monomer can be linear or branched and can preferably contain from 2 to 8 carbon atoms, and more preferably contains 8 carbon atoms. C
1
-C
10
alkyl acrylates which may be mentioned, for example, are propyl acrylate, isopropyl acrylate, n-butyl acrylate, isobutyl acrylate, pentyl acrylate, hexyl acrylate and 2-ethylhexyl acrylate. The acrylate monomer which is particularly preferred is 2-ethylhexyl acrylate.
The vinylaromatic monomer which may be present in the copolymer can be chosen from vinylaromatic monomers other than tert-butylstyrene, which is known to undergo radical-mediated polymerization. Vinylaromatic monomers which can be used in particular are those containing from 8 to 20 carbon atoms, and preferably those containing from 4 to 14 carbon atoms. Such monomers are, for example, styrene, 1-vinylnaphthalene, 2-vinylnaphthalene, 2-methylstyrene (or ortho-methylstyrene), 3-methylstyrene, 4-methylstyrene (or para-methylstyrene), 4-propylstyrene, 4-cyclohexylstyrene, 4-dodecylstyrene, 2-ethyl-4-benzylstyrene and 4-(phenylbutyl)styrene. Styrene, para-methylstyrene, ortho-methylstyrene and mixtures can preferably be used. The vinylaromatic monomer which is particularly preferred is para-methylstyrene.
Advantageously, the copolymer can be derived from the polymerization of:
a) 10 to 30% by weight of para-tert-butylstyrene,
b) 20 to 40% by weight of para-methylstyrene,
c) 25 to 45% by weight of isobutyl methacrylate, and
d) 8 to 25% by weight of 2-ethylhexyl acrylate.
According to a specific embodiment of the invention, the copolymer can be crosslinked and can thus comprise, in a known manner, at least one ethylenic crosslinking monomer. Crosslinking monomers which may be mentioned in particular are ethylene glycol dimethacrylate, ethylene glycol diacrylate and divinylbenzene. Ethylene glycol dimethacrylate is preferably used.
The crosslinking monomer can be present in the copolymer in an amount ranging from 0.1% to 10% by weight relative to the total weight of the mixture of monomers in the copolymer.
The copolymers of the composition according to the invention are known and are described in particular in U.S. Pat. No. 5,496,905, the disclosure of which is incorporated by reference herein. Such copolymers are sold under the names “Plioway® Ultra 200” and “Plioway® Ultra G 20,” by the company Goodyear.
The copolymer can be present in the composition in an amount ranging from 0.5% to 30% by weight relative to the total weight of the composition, preferably from 1 % to 20% by weight, and still more preferably from 5% to 15% by weight.
The fatty phase of the composition according to the invention makes it possible to incorporate the styrene/acrylate copolymer easily into the composition.
The fatty phase can comprise at least one fatty substance which may be liquid, pasty or solid at room temperature (in general 25° C.). In particular, the fatty substance can be chosen from oils, waxes, pasty fatty substances, gums and mixtures thereof. The fatty substance can be present in the composition in an amount ranging from 5% to 99% by weight relative to the total weight of the com
Bodelin Sophie
Collin Nathalie
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
L'Oreal (S.A.)
Page Thurman K.
Seidleck Brian K.
LandOfFree
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