CROSSLINK STABILIZATION PROCESS FOR AZO-CROSSLINKED FLUOROPOLYMER WITH PERFLUOROETHER PENDANT GROUPS
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United States of America Patent
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Issued Date -
Aug 13, 2015
app pub date -
Sep 26, 2013
filing date -
Sep 28, 2012
priority date (Note) -
Abandoned
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Abstract
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.
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