Polymer particle dispersion, composition containing the same and cosmetic treatment method
OwnerNathalle Mougin, Gwenaëlle Jegouinventors
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Abstract
The present patent application relates to novel dispersions of particles of polymer stabilized at the surface in a nonaqueous medium, in which dispersions the polymer comprises mainly hydrophilic cationic monomers. Another subject-matter of the invention is a cosmetic or pharmaceutical composition comprising the said dispersion in a cosmetically or pharmaceutically acceptable medium. The invention also relates to a method for the cosmetic treatment of keratinous substances employing the said composition.
Claims46
1-25. (canceled)
A dispersion of particles of at least one ethylenic polymer, stabilized by a stabilizing agent, in a nonaqueous medium comprising of at least one nonaqueous compound which is liquid at 25° C. and which has an overall solubility parameter, according to the Hansen solubility space, of less than or equal to 20 (MPa)1/2, wherein said at least one ethylenic polymer comprises from 50 to 100% by weight of at least one hydrophilic cationic monomer having a log p of less than or equal to 2, with respect to the total weight of starting monomers.
A cosmetic or pharmaceutical composition comprising, in a cosmetically or pharmaceutically acceptable medium, at least one dispersion of particles of at least one ethylenic polymer, stabilized by a stabilizing agent, in a nonaqueous medium comprising at least one nonaqueous compound which is liquid at 25° C. and which has an overall solubility parameter, according to the Hansen solubility space, of less than or equal to 20 (MPa)1/2, wherein said at least one ethylenic polymer comprises from 50 to 100% by weight of at least one hydrophilic cationic monomer having a log p of less than or equal to 2, with respect to the total weight of starting monomers.
A method for the cosmetic treatment of keratinous substances, comprising the application, to said keratinous substances, of a cosmetic composition, comprising, in a cosmetically or pharmaceutically acceptable medium, at least one dispersion of particles of at least one ethylenic polymer, stabilized by a stabilizing agent, in a nonaqueous medium comprising at least one nonaqueous compound which is liquid at 25° C. and which has an overall solubility parameter, according to the Hansen solubility space, of less than or equal to 20 (MPa)1/2, wherein said at least one ethylenic polymer comprises from 50 to 100% by weight of at least one hydrophilic cationic monomer having a log p of less than or equal to 2, with respect to the total weight of starting monomers.
Dependencies are inferred from the claim text.