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US 5,688,885 AGranted
Tetrafluoroethylene terpolymer
AssigneeE. I. Du Pont de Nemours and Company
InventorLeslie Mitchell Blair
Life of this patent
Estimating the term…
Abstract
Copolymers of tetrafluoroethylene, hexafluoropropylene, and perfluoro(methyl vinyl ether) have excellent flex life.
Claims4
A partially-crystalline copolymer comprising tetrafluoroethylene, hexafluoropropylene in an amount corresponding to HFPI of from 1.9 to about 5.3, and an amount of perfluoro(methyl vinyl ether) effective to improve toughness, characterized by the copolymer exhibiting MIT Flex Life of at least 2000 cycles.
Dependencies are inferred from the claim text.