TETRAFLUOROETHYLENE/PERFLUORO(ALKYL VINYL ETHER) COPOLYMER HAVING AN INCREASED MELTING TEMPERATURE

A Process is provided comprising melt fabricating tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer characterized by an MFR of no greater than 10 g/10 min and PPVE content of no greater than 5 wt% in to a final-shape article and heat aging said article at a temperature of at least 295°C to...

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Bibliographische Detailangaben
1. Verfasser:	BURCH, HEIDI ELIZABETH
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS 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 Process is provided comprising melt fabricating tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer characterized by an MFR of no greater than 10 g/10 min and PPVE content of no greater than 5 wt% in to a final-shape article and heat aging said article at a temperature of at least 295°C to increase the melting temperature of said tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer by at least 6°C. L'invention concerne un procédé comprenant la fabrication à l'état fondu d'un copolymère tétrafluoroéthylène/perfluoro(alkyl vinyl éther) caractérisé par un MFR de pas plus de 10 g/10 min et une teneur en PPVE non supérieure à 5 % en poids dans un article de forme finale et le vieillissement par chauffage dudit article à une température d'au moins 295°C pour augmenter la température de fusion dudit copolymère tétrafluoroéthylène/perfluoro(alkyl vinyl éther) d'au moins 6°C.