Patent ID: 7488781

Claim:
A method of making a cured perfluoroelastomer article comprising the steps of: a) providing a composition comprising a crosslinkable perfluoroelastomer composition consisting essentially of a terpolymer of tetrafluoroethylene (TFE), perfluoroalkyl vinyl ether (PAVE), and perfluoro cyano vinyl ether (CNVE), b) shaping the composition comprising the crosslinkable perfluoroelastomer composition into a shaped article, c) heating the composition at about 250° C. or greater, and d) crosslinking the crosslinkable perfluoroelastomer by heating the composition to form a crosslinked article wherein the method occurs in the absence of an additional crosslinking agent, coagent or catalyst, and wherein the crosslinked article has a metal content of less than about 3000 ppb and a compression set of less than or equal to about 50% when tested at about 200° C.