Patent ID: 6375959
Filing Date: 2002-04-23
Classification: A61K,A61Q,C08J,Y10S

Abstract:
Composition consisting essentially of an oil phase, an aqueous phase, at least one water-in-oil (W/O) emulsifier, at least one oil-in water (O/W) emulsifier;said composition being an inverted latex comprising from 20% to 70% by weight of a branched or crosslinked anionic polyelectrolyte of a monomer possessing a strongly acidic group and comprising 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propane-sulphonic acid which is partially or totally salinized in the form of the sodium salt or the ammonium salt; said composition containing from 2.5% to 15% by weight, of emulsifiers, among which from 20% to 50% of the total weight of the emulsifiers present are water-in-oil (W/O) emulsifiers, and among which from 80% to 50% of the total weight of the emulsifiers are oil-in-water (O/W) emulsifiers, and in which the anionic polyelectrolyte is crosslinked and/or branched with diethylenic or polyethylenic compounds in a molar proportion, expressed relative to the monomers used, of from 0.005% to 1%; said crosslinking agent and/or the branching agent being selected from the group consisting of ethylene glycol methacrylate, sodium diallyloxyacetate, diethylene glycol, diacrylate, diallylurea, trimethylopropane triacrylate and methylenebisacrylamide; and said oil phase representing from 15% to 40% of the total weight of the composition.