Drug – bio-affecting and body treating compositions – Live hair or scalp treating compositions – Polymer containing
Patent
1997-12-30
1999-11-02
Azpuru, Carlos A.
Drug, bio-affecting and body treating compositions
Live hair or scalp treating compositions
Polymer containing
424 7012, 424 7803, A61K 706, A61K 711, A61K 3174
Patent
active
059765178
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a cosmetic or dermatological composition for treating keratin substances, in particular human hair, comprising at least one grafted silicone polymer containing a polysiloxane skeleton grafted with anionic, amphoteric or nonionic non-silicone organic monomers and at least one amphoteric polymer.
Grafted silicone polymers are known in the prior art, such as those described in patent applications EP-A-0,582,152 and WO 93/23009. These polymers are proposed in hair composition for their styling properties. However, when these polymers are used, the fixing power of the composition and the feel of the hair are unsatisfactory.
The Applicant has discovered, surprisingly, that by combining at least one grafted silicone polymer of the anionic, amphoteric or nonionic type with at least one amphoteric polymer in an amphoteric polymer/grafted silicone polymer ratio of between 0.25 and 15, the softness and feel properties of hair 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 of the anionic, amphoteric or nonionic type and at least one amphoteric polymer, in an amphoteric polymer/grafted silicone polymer ratio of between 0.25 and 15.
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, amide groups, acyloxy radicals or acyloxyalkyl radicals, 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).
According to the present invention, the silicone polymer(s) which must be used is (are) that (those) which comprise(s) a main silicone chain (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 can be existing commercial products or can be obtained according to any means known to those skilled in the art, in particular by reaction between (i) a starting silicone which is 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(s) borne by the said silicone, forming a covalent bond; a classic example of such a reaction is the hydrosilylation reaction between .tbd.Si--H groups and vinyl groups CH.sub.2 .dbd.CH--, or alternatively the reaction between thio functional groups --SH with these same vinyl groups.
Examples of silicone polymers which are suitable for carrying out the present invent
REFERENCES:
English Language Derwent Abstract of FR 2 709 955.
Cauwet-Martin Daniele
Dubief Claude
Dupuis Christine
"L'Oreal"
Azpuru Carlos A.
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