Patent ID: 6197287
Filing Date: 2001-03-06
Classification: A61K,A61Q,C08F,Y10S

Abstract:
Composition comprising an oil phase, an aqueous phase, at least one water-in-oil emulsifier, at least one oil-in-water emulsifier, wherein the composition is an inverted latex comprising from 20% to 60% by weight of a branched or crosslinked anionic polyelectrolyte from at least one monomer possessing a strongly acidic function, copolymerized either with at least one monomer possessing a weakly acidic function or with at least one neutral monomer; the strongly acidic function of the monomer containing it being a sulfonic acid function or a phosphonic acid function, partially or totally salified; the weakly acidic function of the monomer containing it being a carboxylic acid function, and the monomer being selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid and maleic acid, partially or totally salified; the neutral monomer being selected from the group consisting of 2-hydroxyethyl acrylate, 2,3-dihydroxypropyl acrylate, 2-hydroxyethyl methacrylate, 2,3-dihydroxypropyl methacrylate, and an ethoxylated derivative, with a molecular weight between 400 and 1000, of each of these esters, the anionic polyelectrolyte being crosslinked and/or branched with a diethylenic or polyethylenic compound in a molar proportion, expressed relative to the monomers used, of from 0.005% to 1%; and wherein 30% to 906 of the monomer units which comprise the anionic polyelectrolyte have a strongly acidic function.