Drug – bio-affecting and body treating compositions – Live hair or scalp treating compositions – Hair coloring
Reexamination Certificate
2000-06-29
2003-03-18
Page, Thurman K. (Department: 1615)
Drug, bio-affecting and body treating compositions
Live hair or scalp treating compositions
Hair coloring
C424S401000
Reexamination Certificate
active
06534047
ABSTRACT:
The present invention relates to a composition for coating keratin fibers comprising a mixture of film-forming polymers. The invention also relates to the use of this composition for making up keratin fibers, as well as to a process for making up these fibers. The composition and the make-up process according to the invention are suitable for substantially longilinear human keratin fibers such as the eyelashes, the eyebrows and the hair, including false eyelashes and hairpieces. The composition can be a make-up composition, a make-up base, a composition to be applied to a make-up, also known as a top-coat, or, alternatively, a composition for cosmetically treating keratin fibers. According to one embodiment, the invention relates to a mascara.
Compositions for coating the eyelashes, known as mascaras, generally comprise at least one wax and at least one film-forming polymer. A mascara is typically used to deposit a make-up film on the eyelashes and coat them. Published PCT Application No. WO-A-95/15741, for example, describes such compositions. Users expect these products to have good a cosmetic properties, such as adhesion to the eyelashes, lengthening or a curling of the eyelashes, or, alternatively, good staying power of the mascara over time, in particular good resistance to rubbing, for example with the fingers or fabrics (handkerchiefs, towels).
To give the eyelashes a lengthening effect, French Patent Application No. FR-A-2 528 699 proposes a mascara comprising waxes and a combination of anionic polymer and cationic polymer. However, these compositions may not allow optimum curling of the eyelashes.
One aspect of the present invention is to provide a composition for making up keratin fibers, including fibers such as the eyelashes, which may apply easily and may provide for good curling of the keratin fibers.
The inventor has discovered that such a composition may be obtained using a specific combination of film-forming polymers.
More specifically, one aspect of the invention is a composition for making up keratin fibers comprising at least one film-forming polymer comprising at least one cationic film-forming polymer and at least one anionic film-forming polymer, characterized in that it comprises an aqueous dispersion of at least one C
1
-C
6
alkyl (meth)acrylate nonionic film-forming polymer.
The composition according to the invention may apply easily and may attach well to keratin fibers such as the eyelashes. It has been found that the make-up results such as the coating, lengthening, and curling of the eyelashes may be obtained quickly and easily after applying the composition to the eyelashes. The make-up may be comfortable for the user to wear, and it may be easily removed with conventional make-up-removing agents.
One embodiment of the invention is a process for coating keratin fibers, such as the eyelashes, comprising applying a composition as defined above to the keratin fibers.
Another embodiment of the invention is the use of a composition as defined above to curl and/or lengthen and/or coat the eyelashes, and/or to obtain a fast make-up, and/or a make-up which is easy to apply, and/or which has good staying power.
The expression “film-forming polymer” means a polymer which by itself, or in the presence of a plasticizer, leads to an isolable film.
The composition according to the invention comprises an aqueous dispersion of at least one nonionic film-forming C
1
-C
6
alkyl (meth)acrylate polymer, such as a polymer derived from at least one C
1
-C
6
alkyl (meth)acrylate monomer. These polymers can be chosen from C
1
-C
4
alkyl (meth)acrylate polymers, such as copolymers derived from at least one monomer chosen from C
1
-C
4
alkyl acrylate and C
1
-C
4
alkyl methacrylate. C
1
-C
4
alkyl (meth)acrylates which may be mentioned include, for example, methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, and butyl (meth)acrylate. A copolymer derived from ethyl acrylate and methyl methacrylate, such as the one sold under the name DAITOSOL 5000 AD by Daito Kasey Kogyo, may be used.
The aqueous dispersion of nonionic film-forming alkyl (meth)acrylate polymer can comprise polymer particles ranging from 10 nm to 500 nm in size. In another embodiment, the particles can range from 20 nm to 300 nm in size.
The expression “aqueous dispersion of polymer”, which is generally known as a latex or pseudo-latex, means a phase containing water and optionally a water-soluble compound, in which the polymer is dispersed directly in the form of particles.
In practice, the nonionic film-forming C
1
-C
6
alkyl (meth)acrylate polymer can be present in the composition according to the invention in a solids content ranging from 0.1% to 15% by weight, relative to the total weight of the composition. In another embodiment, the solid content can range from 0.5% to 8% by weight.
According to one embodiment, the composition according to the invention may contain any known anionic polymer, including a non-crosslinked anionic polymer, or any known cationic polymer.
These polymers can be used in dissolved form or in the form of aqueous dispersions of solid polymer particles.
The anionic polymers generally used can be polymers comprising groups derived from at least one monomer chosen from carboxylic, sulfonic, and phosphoric acid, and can have a weight-average molecular weight ranging from about 500 to about 5,000,000.
1) The carboxylic groups can be borne by unsaturated mono- or dicarboxylic acid monomers such as those corresponding to formula (I):
wherein n is an integer from 0 to 10,
A can be a methylene group, optionally connected to the carbon atom of the unsaturated group or to the neighboring methylene group when n is greater than 1 via a hetero atom such as oxygen or sulphur;
R
5
is chosen from a hydrogen atom, a phenyl group, and a benzyl group;
R
3
is chosen from a hydrogen atom, lower alkyl groups, and carboxyl groups; and
R
4
is chosen from a hydrogen atom, lower alkyl groups,
CH
2
—COOH, phenyl groups, and benzyl groups.
In the abovementioned formula and throughout the disclosure, the expressions “lower alkyl” and “lower alkyl radical” can denote a group containing 1 to 8 carbon atoms such as, for example, methyl and ethyl.
The anionic polymers containing carboxylic groups which are useful according to the invention include:
A) Homo- and copolymers derived from at least one monomer chosen from acrylic and methacrylic acid and the salts of the homo- and copolymers (such as alkali metal, alkaline earth metal, and ammonium salts), including the products sold under the names VERSICOL E or VERSICOL K by Allied Colloid, ULTRAHOLD by BASF, and DARVAN 7 by Vanderbilt. The copolymers derived from acrylic acid and acrylamide sold in the form of their sodium salt under the names RETEN 421, RETEN 423, or RETEN 425 by Hercules, and the sodium salts of polyhydroxycarboxylic acids.
B) Copolymers derived from (i) at least one monomer chosen from acrylic and methacrylic acids and (ii) a monoethylenic monomer such as ethylene, styrene, vinyl esters, and acrylic or methacrylic acid esters. These copolymers can be grafted onto a polyalkylene glycol such as polyethylene glycol. Such polymers are described in, for example, French Patent No. 1,222,944, and German Patent Application No. 2,330,956, the disclosures of which are incorporated by reference herein. Mention may be made of copolymers whose chain comprises an optionally N-alkylated and/or hydroxyalkylated acrylamide unit, such as those described in Luxembourg Patent Application Nos. 75370 and 75371, the disclosures of which are incorporated by reference herein, or sold under the name QUADRAMER by American Cyanamid. Mention may also be made of copolymers derived from acrylic acid and C
1
-C
4
alkyl methacrylate and terpolymers derived from vinylpyrrolidone, (meth)acrylic acid and (meth)acrylate of a C
1
-C
20
alkyl, for example of lauryl (such as the product sold by ISP under the name ACRYLIDONE LM), of tert-butyl (LUVIFLEX VMB 70 sold by BASF) or of methyl (STEPANHOLD EXTRA sold by Stepan) and methacrylic acid/ethyl acryl
Howard S.
L'Oreal (S.A.)
Page Thurman K.
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