Drug – bio-affecting and body treating compositions – Manicure or pedicure compositions
Patent
1993-04-05
1994-12-06
Page, Thurman K.
Drug, bio-affecting and body treating compositions
Manicure or pedicure compositions
523105, A61K 704
Patent
active
053708660
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The subject of the present invention is a colored or colorless nail polish containing aramide fibers in addition to the usual ingredients.
BACKGROUND
Of the principal characteristics that nail polishes should possess, the following may be singled out in particular: good adhesion to the nail surface, and a certain flexibility and strength of the film to prevent its fragility leading to cracking of the polish.
In general, at the present time, modified resins are used to confer good adhesion and plasticizers to lead to good flexibility of the polish.
After a substantial volume of research, it has not been found that good adhesion of a colorless or colored polish to the nail surface as well as good strength can be obtained by incorporating certain fibers.
British Patent No. 1,177,420 has already proposed polishes for reinforcing and repairing broken nails, containing 0.5 to 12% of certain fibers such as for example fibers of silk, cotton, nylon, polyacrylonitrile, polyethylene terephthalate, and other polymers or copolymers.
According to this patent, the fibers present in the polish act as a nail-reinforcing agent but do not favor adhesion or strength of the polish on the nail at all.
SUMMARY OF THE INVENTION
An object of the present invention, as a novel industrial product, is a colorless or colored nail polish containing, in a polish solvent system, a film-forming substance, a resin, and a plasticizer, said polish also containing 0.01 to 0.5 wt.% of aramide fibers.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
The expression "aramide fibers" shall be understood to mean poly(paraphenylene terephthalamide) fibers which may be obtained by polycondensation of paraphenylenediamine and terephthalyl chloride.
Of the aramide fibers that can be used in the polishes according to the invention, the fibers known under the commercial names of "Kevlar" in particular "Kevlar Dry Pulp" sold by the duPont de Nemours Company and "Arenka" sold by the Enka Glanzstoff Company, may be cited in particular.
The length of the fibers is generally between approximately 2 and 4 mm.
According to one particular embodiment of the invention, the polish preferably contains 0.05 to 0.2 wt.% of aramide fibers.
The aramide fiber concentration is generally higher in a colorless polish than in a colored polish.
In a colorless polish or base polish, the aramide fibers confer a slightly rough appearance on the deposited film, allowing better adhesion of the colored nail polish applied subsequently without the gloss of the colored film being altered.
Moreover, application of the colored polish proves far easier as it is homogenous over the entire nail surface.
The polish solvent system according to the invention is generally present in a proportion of between 55 and 90 wt.% based on the total weight of the polish.
This solvent system may essentially be composed of a mixture of various volatile organic solvents in order to achieve relatively short drying times.
Among these solvents, acetone, ethyl acetate, butyl acetate, 2-methoxyethyl acetate, methyl ethyl ketone, methyl isobutyl ketone, methyl acetate, amyl, acetate, and isopropyl acetate can be cited.
The solvent system may also contain a diluent which is preferably a saturated linear or branched hydrocarbon such as hexane or octane or an aromatic hydrocarbon such as toluene or xylene in a proportion generally ranging from 10 to 30% relative to the total weight of the polish.
The solvent system can also contain other volatile solvents such as ethanol, n-butanol, n-propanol, isopropanol, or mixtures thereof.
The film-forming agent is generally present in the polish according to the invention in a concentration of between 5 and 20%, preferably 10 and 20 wt.%, relative to the total weight of the polish.
Of the particularly preferred film-forming agents, "RS" or "SS" type nitrocelluloses, particularly the type 1/4 second RS nitrocellulose, type 1/2 second RS nitrocellulose, type 1/2 second SS nitrocellulose, and type 3/4 second RS nitrocellulose should be cited.
According to
REFERENCES:
patent: 4822423 (1989-04-01), Soyama et al.
patent: 4873077 (1989-10-01), Thompson et al.
Farer Alan M.
Frankfurt Christopher C.
Penicnak Adrian J.
"L'Oreal"
Page Thurman K.
Venkat Jyothsna
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