Drug – bio-affecting and body treating compositions – Solid synthetic organic polymer as designated organic active...
Patent
1997-12-30
2000-10-17
Williamson, Michael A.
Drug, bio-affecting and body treating compositions
Solid synthetic organic polymer as designated organic active...
424 7011, 424 7012, 424 7021, 424 7022, 424 7027, 424 7031, A61K 706
Patent
active
061327077
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a cosmetic or dermatological composition for treating keratin substances, in particular human hair, this composition comprising at least one grafted silicone polymer containing a polysiloxane skeleton grafted with non-silicone organic monomers and at least one amphiphilic polymer containing at least one fatty chain and at least one hydrophilic unit.
The polymers of the grafted silicone polymer type containing a polysiloxane skeleton grafted with non-silicone organic monomers are known in the prior art for their hairstyling properties. They are particularly advantageous in haircare cosmetics since they give the hair hold. However, when they are applied to the hair their cosmetic properties are unsatisfactory. It is observed that the hair has a coarse and crisp feel after these polymers have been applied, resulting from a non-continuous distribution of the polymer along the hair fibres.
The Applicant has observed that certain standard thickeners such as, for example, crosslinked poly(acrylic acid) homopolymers, used in haircare compositions containing these particular polymers have a tendency to lower the viscosity of the composition and do not allow the distribution of the composition along the wet or dry hair fibres to be improved appreciably, nor do they allow the softness to the touch or the disentangling properties to be improved appreciably after it has been applied.
The Applicant has found, surprisingly, that the use of an amphiphilic polymer containing at least one fatty chain and at least one hydrophilic unit, as a thickener in haircare compositions containing a polymer with a polysiloxane skeleton grafted with non-silicone organic monomers makes it possible not only to increase the viscosity of the medium of these compositions appreciably but also to improve, on application, the deposition of the grafted silicone polymer along the keratin fibres and to improve their cosmetic properties, especially as regards the feel and the disentangling, while at the same time retaining the styling properties of the grafted silicone polymer.
The composition according to the invention is thus essentially characterized in that it contains, in a cosmetically or dermatologically acceptable medium, at least one grafted silicone polymer containing a polysiloxane skeleton grafted with non-silicone organic monomers and at least one amphiphilic polymer containing at least one fatty chain and at least one hydrophilic unit.
In the following text, in accordance with what is generally accepted, the term silicone polymer is understood to denote any organosilicon polymer or oligomer having a linear or cyclic, branched or crosslinked structure of variable molecular weight, obtained by polymerization and/or polycondensation of suitably functionalized silanes, and consisting essentially of a repetition of main units in which the silicon atoms are linked together by oxygen atoms (siloxane bonding .tbd.Si--O--Si.tbd.), optionally substituted hydrocarbon radicals being linked directly via a carbon atom to the said silicon atoms. The most common hydrocarbon radicals are alkyl radicals, especially C.sub.1 -C.sub.10 alkyl radicals, and in particular methyl, fluoroalkyl radicals, aryl radicals and in particular phenyl, and alkenyl radicals and in particular vinyl; other types of radicals which can be linked, either directly or via a hydrocarbon radical, to the siloxane chain are, especially, hydrogen, halogens and in particular chlorine, bromine or fluorine, thiols, alkoxy radicals, polyoxyalkylene (or polyether) radicals and in particular polyoxyethylene and/or polyoxypropylene, hydroxyl or hydroxyalkyl radicals, substituted or unsubstituted amine groups, amide groups, acyloxy or acyloxyalkyl radicals, hydroxyalkylamino or aminoalkyl radicals, quaternary ammonium groups, amphoteric or betaine groups, anionic groups such as carboxylates, thioglycolates, sulphosuccinates, thiosulphates, phosphates and sulphates, needless to say this list not being limiting in any way (so-called "organomodified" silicones).
REFERENCES:
patent: 5362485 (1994-11-01), Hayama et al.
patent: 5855878 (1999-01-01), Coffindaffer et al.
English Language Derwent Abstract of FR 2 709 955.
Dubief Claude
Dupuis Christine
"L'Oreal"
Williamson Michael A.
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