POLYMER PURIFICATION

摘要

A process for removing silicon impurities from a polymer comprising the steps of (1) dissolving said polymer in a first solvent to make a solution, (2) adding a non-solvent to said solution, and (3) contacting said solution containing said non-solvent with a mixture of acidic cation and basic anion exchange resins, for a sufficient period of time to substantially remove all of said silicon from the solution of step (2).