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 polyme...

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Bibliographische Detailangaben
Hauptverfasser:	MOHAJER, YOUSEF, NGUYEN, TRUC-LAM HUYNH, DEGRASSI, ALFIERI, BELFOURE, EDWARD, LOUIS, SASTRI, VINOD, RAM
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS MAKING GRANULES OR PREFORMS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	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 polydimethysiloxane, 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. L'invention se rapporte à un film de séparation polymère, qui comprend un polymère de base filmogène et un additif copolymère modificateur de surface qui produit les propriétés de séparation désirées. L'additif copolymère contient un composant polymère à segments durs choisi de façon à produire un niveau désiré de compatibilité avec le polymère de base filmogène, ainsi qu'un composant polymère à segments moux choisi dans le groupe composé des polydiorganosiloxanes, tel que le polydiméthyle siloxane, le polydialkyle siloxane et le polyfluoroalkyle alkyle siloxane; d'oxyde de polyalkylène; polyoléfine; polydiène et polyfluorocarbone. L'invention se rapporte également à un procédé d'utilisation de ce film de séparation comme substrat pour le dépôt de fibres de renforcement et de matrices résineuses dans la production de matériaux composites tels que les pré-imprégnés, de composés de moulage en masse, de composés de moulage en feuilles et de composés de moulage épais.