Patent ID: 7666337
Filing Date: 2010-02-23
Classification: A61K,A61P,A61Q,C08J,F26B

Abstract:
1. A process for making a film having a substantially uniform distribution of components, comprising the steps of: (a) forming a flowable polymer matrix comprising a water-soluble polymer composition comprising polyethylene oxide, at least 30% solvent and an active component, said matrix having a uniform distribution of said active component; (b) casting said flowable polymer matrix; (c) evaporating at least a portion of said solvent from said flowable polymer matrix to form a visco-elastic film within about 10 minutes or fewer to maintain said uniform distribution of said active component by locking-in or substantially preventing migration of said active component within said visco-elastic film; and (d) forming a resulting film from said visco-elastic film, wherein said resulting film has a water content of 10% or less and said uniform distribution of active by said locking-in or substantially preventing migration of said active component is maintained.