Drug – bio-affecting and body treating compositions – Manicure or pedicure compositions
Reexamination Certificate
1995-07-13
2001-10-23
Page, Thurman K. (Department: 1615)
Drug, bio-affecting and body treating compositions
Manicure or pedicure compositions
C424S401000
Reexamination Certificate
active
06306374
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a nail care composition containing, in an aqueous or weakly aqueous-alcoholic medium, the combination of a water-dispersible polycondensate containing sulphonate functional groups and a water-soluble copolymer containing at least units having a neutralized carboxylic acid functional group, and at least one nail care active principle.
2. Discussion of the Background
The nails can present various problems. They can, in particular, be damaged by organic solvent-based nail varnishes or, alternatively, by compositions which dissolve these varnishes.
With a view to protecting the nails from the harm caused, in particular, by the presence of organic solvents, various base compositions have been proposed, to be applied prior to the application of the varnish, these compositions playing essentially the part of a physical barrier in order to avoid contact of the varnish with the nail.
Thus, in Application JP 92-103511, nail varnish, base or pre-coating compositions have been described, based on an aqueous emulsion of a polymer of cationic, nonionic or amphoteric nature, but preferably cationic, prepared by polymerization of hydrophobic monomers and monomers containing tertiary amine groups, optionally neutralized with an inorganic or organic acid. These base compositions display some degree of resistance to water, and are removed only at the same time as the nail varnish by means of a dissolving agent containing organic solvents.
Moreover, the nails may also be damaged by frequent contact with detergents or, alternatively, by the use of aqueous nail varnishes of the peelable type, the removal of which brings about a desquamation of the keratin of the nail.
It is desirable to have compositions not displaying any toxicity for the nails, the removal of which would not be detrimental to the nails and which, in addition, would enable the active principle or principles intended for treating the various problems mentioned above to be efficiently applied on the surface of the nail.
In order to be satisfactory, these compositions must, furthermore, be readily applicable to the nail, dry fairly rapidly and leave after drying a film which must, on the one hand cover the whole of the surface of the nail, and on the other hand display good adhesion.
SUMMARY OF THE INVENTION
It has now been found, surprisingly and unexpectedly, that nail care compositions displaying the above mentioned properties are obtained by combining, in an aqueous or aqueous-alcoholic vehicle, a water-dispersible polycondensate containing sulphonate functional groups, a water-soluble copolymer containing neutralized carboxylic acid functional groups and at least one nail care active principle.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The subject of the present invention is a nail care composition containing, in an aqueous or aqueous-alcoholic medium:
a) from 5 to 50% by weight relative to the total weight of the composition of a water-dispersible polycondensate containing sulphonate functional groups,
b) from 0.5 to 20% by weight relative to the total weight of the composition of a water-soluble copolymer containing carboxylic acid functional groups neutralized in a proportion of at least 80% with a nonvolatile basic agent, the weight average molecular weight of the copolymer being between 1,000 and 700,000, and
c) from 0.01 to 0.5% by weight relative to the total weight of the composition of a nail care active principle.
Preferably, the composition according to the invention contains from 10 to 25% by weight relative to the total weight of the composition of the water-dispersible polycondensate as defined above, and preferably from 2 to 10% by weight relative to the total weight of the composition of the water-soluble copolymer as defined above.
According to an embodiment of the compositions according to the invention, the ratio by weight of the water-soluble copolymer to the water-dispersible polycondensate is between 0.05 and 0.4, and preferably between 0.1 and 0.3.
The water-dispersible polycondensates containing sulphonate functional groups used according to the invention generally have a glass transition temperature of between 10° C. and 100° C., and preferably between 25° C. and 60° C.
Water-dispersible polycondensates containing sulphonate functional groups are preferably understood, according to the invention, to mean copolyesters or copolyesteramides. The copolyesters are obtained by polycondensation of at least one dicarboxylic acid or one of its esters, at least one diol and at least one bifunctional sulphoaryldicarboxylic compound substituted on the aromatic ring system with an —SO
3
M group in which M represents a hydrogen atom or a metal ion such as Na
+
, Li
+
or K
+
.
The copolyesteramides are obtained in the same manner as the copolyesters, but the polycondensation also involves a diamine and/or an amino alcohol.
The water-dispersible polycondensates as defined above are known, and have been described, in particular, in U.S. Pat. No. 3,779,993, U.S. Pat. No. 4,300,580 and EP 0,540,374 which are incorporated herein by reference.
They generally have a weight average molecular weight of between about 1,000 and 60,000, and preferably of about 14,000.
Preferably, the water-dispersible polycondensates containing sulphonate functional groups used according to the invention display the common feature of comprising at least some units derived from isophthalic acid, from a sulphoaryldicarboxylic acid salt and from diethylene glycol.
According to a particular embodiment of the composition according to the invention, the water-dispersible polycondensates containing sulphonate functional groups used are copolyesters consisting of units derived from isophthalic acid, from sulphoisophthalic acid sodium salt, from diethylene glycol and from 1,4-cyclohexanedimethanol, these preferably being present in proportions of 89:11:78:22 or 82:18:54:46. These polycondensates are marketed, respectively, under the trade names “AQ 38®” and “AQ 55®” by the company Eastman Kodak.
According to another embodiment of the compositions according to the invention, the water-dispersible polycondensates used can contain, in addition, units derived from ethylene glycol, from tri- and tetraethylene glycol and from terephthalate.
The water-soluble copolymers containing carboxylic acid functional groups used according to the invention are synthetic polymers, and are preferably selected from the group consisting of:
a) polyoxyethylenated vinyl acetate/crotonic acid copolymers,
b) N-octylacrylamide/methyl methacrylate/hydroxylpropyl methacrylate/acrylic acid/tert-butylaminoethyl methacrylate copolymers,
c) methyl vinyl ether/maleic anhydride alternating copolymers monoesterified with butanol,
d) acrylic acid/ethyl acrylate/N-tert-butylacrylamide terpolymers, and
e) the copolymers corresponding to the following formula (I):
in which:
R, R′ and R″, which may be identical or different, are a hydrogen atom or a methyl group,
m, n and t are 1 or 2,
R
1
is a saturated or unsaturated, linear or branched alkyl group having from 2 to 21 carbon atoms,
Z is a bivalent group taken from the group consisting of —CH
2
—, —CH
2
—O—CH
2
— and —CH
2
O—(CH
2
)
2
—,
and Cyc is a group selected from the group consisting of:
(i) a group of formula:
(ii) a group of formula:
in which:
R
2
is a hydrogen atom or a methyl group, and p is 1 or 2,
(iii) a group of formula:
in which:
R
3
is a hydrogen atom or a methyl, ethyl, tert-butyl, ethoxy, butoxy or dodecyloxy group and R
4
is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and
(iv) a group of formula:
v is from 10 to 97% and preferably from 36 to 90% by weight,
w is from 3 to 20% and preferably from 6 to 12% by weight,
x is from 0 to 60% and preferably from 6 to 40% by weight, and
y is from 0 to 40% and preferably from 4 to 30% by weight,
v+w+x+y being equal to 100%.
Among polyoxyethylenated vinyl acetate/crotonic acid copol
Mondet Jean
Ramin Roland
Howard S.
L'Oreal
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Page Thurman K.
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