C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 5/18 (2006.01) B29C 33/68 (2006.01) B32B 27/04 (2006.01) C08G 18/61 (2006.01) C08G 18/65 (2006.01) C08G 69/42 (2006.01)
Patent
CA 2078693
ABSTRACT OF THE INVENTION 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.
Belfoure Edward L.
Degrassi Alfieri
Mohajer Yousef
Nguyen Truc-Lam H.
Sastri Vinod R.
Alliedsignal Inc.
Gowling Lafleur Henderson Llp
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