Patent ID: 7416739
Filing Date: 2008-08-26
Classification: A61K,A61Q

Abstract:
1. A process for retaining an active ingredient in a composition comprising: (a) polymerizing butyl acrylate, methacrylic acid, methyl methacrylate and cetyl-eicosyl methacrylate by aqueous emulsion polymerization to form a polymer having a network structure of 1.4% by weight of polymerized residues of methacrylic acid, 49% by weight of polymerized residues of butyl acrylate, 18.6% by weight of polymerized residues of methyl methacrylate and 31% by weight of polymerized residues of cetyl-eicosyl methacrylate and (b) combining the polymer and one or more active ingredients in an oil phase; wherein the polymer is present in the oil phase in an amount from 0.01 to 10% by weight based on the total weight of the composition.