CROSSLINK STABILIZATION PROCESS FOR AZO-CROSSLINKED FLUOROPOLYMER WITH PERFLUOROETHER PENDANT GROUPS

CROSSLINK STABILIZATION PROCESS FOR AZO-CROSSLINKED FLUOROPOLYMER WITH PERFLUOROETHER PENDANT GROUPS

This invention pertains to a thermal treatment process for converting azo crosslinks in an azo-crosslinked fluoropolymer having perfluoroether pendant groups to perfluoroalkyl crosslinks. The perfluoroalkyl crosslinks exhibit greater thermal and chemical stability than to the azo crosslinks. Accordi...

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Bibliographische Detailangaben
1. Verfasser: WHELAND ROBERT CLAYTON
Format: Patent
Sprache:eng
Schlagworte:
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
GENERAL PROCESSES OF COMPOUNDING
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
WORKING-UP
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Beschreibung
Zusammenfassung:This invention pertains to a thermal treatment process for converting azo crosslinks in an azo-crosslinked fluoropolymer having perfluoroether pendant groups to perfluoroalkyl crosslinks. The perfluoroalkyl crosslinks exhibit greater thermal and chemical stability than to the azo crosslinks. According to the treatment, an azo-crosslinked fluoropolymer having perfluoroether pendant groups is subject to heating in the temperature range of 300 to 350° C. in order to effect a high degree of conversion to the perfluoroalkyl-crosslinked fluoropolymer.