Patent ID: 8735504
Filing Date: 2014-05-27
Classification: A61K,B29C,B29K,C08G,C08J,C08L

Abstract:
1. A method for preparing at least two polymers having a residual monomer content of less than 5%, the method comprising mixing the at least two polymers in a solvent to form a polymeric mixture, the polymeric mixture comprising at least one residual monomer; and adding an antisolvent to the polymeric mixture so as to separate the at least two polymers from the polymeric mixture, wherein the residual monomer is soluble in the antisolvent, wherein the at least two polymers include a first polymer in an amount of about 10%, a second polymer in an amount of about 20%, a third polymer in an amount of about 50% and a fourth polymer of about 20% by weight or volume based on the total weight or volume of the polymeric mixture.