| abstract |
Process for preparing a linear, branched or crosslinked anionic polyelectrolyte from free, partially salified or totally salified 2-methyl 2 - [(1-oxo 2-propenyl) amino] 1-propanesulfonic acid in the form of the sodium salt , of at least one neutral monomer, and optionally of at least one monomer of formula (I): in which R1 represents a hydrogen atom or a methyl radical, R represents an alkyl radical comprising from eight to thirty carbon atoms and n represents a number greater than or equal to one and less than or equal to fifty, said process comprising the following steps: A step a) of mixing all of the monomers and, where appropriate of the crosslinking agent and / or other additives in an organic solvent, chosen from, chosen from propan-2-one, butan-2-one, pentan-2-one, 3-methyl butan-2-one, 3-ethyl pentane-20 -one or 4-methyl pentan-2-one; A step b) during which the polymerization reaction is initiated by introducing into the dispersion prepared in step a), a free radical initiator, allowed to proceed until its conclusion. Use of said polyelectrolyte as a thickener and / or as a stabilizer and / or emulsifier, of a topical cosmetic, dermopharmaceutical or pharmaceutical composition. Topical cosmetic, dermopharmaceutical or pharmaceutical composition comprising. |