Drug – bio-affecting and body treating compositions – Live hair or scalp treating compositions – Polymer containing
Patent
1997-06-26
2000-07-11
Venkat, Jyothsna
Drug, bio-affecting and body treating compositions
Live hair or scalp treating compositions
Polymer containing
424 47, 424 61, 424 701, 424 7016, 424 7017, 424 7022, 424401, A61K 7075, A61K 748
Patent
active
060868627
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a cosmetic or dermatological composition for the treatment of keratinous material, in particular the hair, comprising at least one grafted silicone polymer, containing a polysiloxane skeleton grafted with non-silicone organic monomers and at least one anionic polymer.
Grafted silicone polymers are known in the state of the art, such as those described in patent applications EP-A-0,582,152 and WO 93/23009. These polymers are proposed in hair compositions for their styling properties. However, when these polymers are used, the hold of the hairstyle and the feel of the hair are not satisfactory.
The Applicant has discovered, surprisingly, that by combining at least one grafted silicone polymer with at least one anionic polymer in an anionic polymer/grafted silicone polymer weight ratio of between 0.25 and 15, properties of hair softness and feel are obtained which are substantially superior to those obtained with each polymer used alone.
The composition according to the invention is thus essentially characterized in that it comprises, 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 anionic polymer in an anionic polymer/grafted silicone polymer weight ratio of between 0.25 and 15.
In the following text, in accordance with that which is generally accepted, the term silicone polymer is understood to denote any organosilicon polymer or oligomer with a branched or crosslinked, linear or cyclic 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 linkage .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, notably 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 may be linked, either directly or via a hydrocarbon radical, to the siloxane chain are, notably, 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 and anionic groups such as carboxylates, thioglycolates, sulphosuccinates, thiosulphates, phosphates and sulphates, this list not, of course, being limiting in any way (so-called "organomodified" silicones).
According to the present invention, the silicone polymer or polymers which must be used are those which comprise a main chain of silicone (or polysiloxane (.tbd.Si--O--).sub.n) on which is grafted, inside the said chain as well as optionally on at least one of its ends, at least one organic group containing no silicone.
These silicone polymers may be existing commercial products or may be obtained according to any means known to those skilled in the art, in particular by reaction between (i) a starting silicone correctly functionalized on one or more of these silicon atoms and (ii) a non-silicone organic compound which is itself correctly functionalized with a function which is capable of reacting with the functional group or groups carried by the said silicone, forming a covalent bond; a standard example of such a reaction is the hydrosilylation reaction between .tbd.Si--H groups and CH.sub.2 .dbd.CH-- vinyl groups, or alternatively the reaction between --SH thiofunctional groups and these same vinyl groups.
Examples of silicone polymers which are suitable for carrying out the present invention,
REFERENCES:
patent: 4983418 (1991-01-01), Murphy et al.
patent: 5034218 (1991-07-01), Duvel
patent: 5362485 (1994-11-01), Hayama et al.
patent: 5468477 (1995-11-01), Kumar et al.
patent: 5618524 (1997-04-01), Bolich, Jr. et al.
Cauwet-Martin Daniele
Dubief Claude
Dupuis Christine
"L'Oreal"
Venkat Jyothsna
LandOfFree
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