POLYMERIC RELEASE FILMS AND THEIR METHOD OF USE

摘要

POLYMERIC RELEASE FILMS AND THEIR METHOD OF USE A polymeric release film comprises a film forming base polymer and a surface modifying copolymer additive which provides desired release properties. The copolymer additive comprises a hard segment polymer component selected to obtain a desired level of compatibility with the film forming base polymer and a soft segment polymer component selected from the group consisting of polydiorganosiloxanes such as polydimethylsiloxane, polydialkylsiloxane, and polyfluoroalkyl alkyl siloxane; polyalkylene oxide; polyolefin; polydiene and polyfluorocarbon. The method of use of the release film as a substrate for deposition of reinforcing fiber and resin matrix in the production of composite materials including prepregs, bulk molding compound, sheet molding compound and thick molding compound is a part of this invention.