Patent ID: 6465576
Filing Date: 2002-10-15
Classification: C08F,C08K

Abstract:
A curable fluoroelastomer composition comprising:(1) a fluoroelastomer containing interpolymerized units derived from (a) at least one perfluoroolefin; (b) at least one perfluorovinyl ether selected from the group consisting of perfluoro(alkyl vinyl) ethers, perfluoro(alkoxy vinyl) ethers, and mixtures thereof, and (c) a cure site component; (2) at least one additive selected from acid functional oniums having the formula: [R3â€”Qâ€”Z]n(+)[X]n(âˆ’) â€ƒwherein Q is a nitrogen, phosphorus, arsenic, or antimony; Z is a hydrogen atom or is a substituted or unsubstituted, cyclic or acyclic alkyl group having from 4 to about 20 carbon atoms that is terminated with a group of the formula â€”COOA where A is a hydrogen atom or is a metal cation or Z is a group of the formula CY2â€”COOAâ€² where Y is a hydrogen or halogen atom, or is a substituted or unsubstituted alkyl or aryl group having from 1 to about 6 carbon atoms that may optionally contain one or more catenary heteroatoms and where Aâ€² is a hydrogen atom, a metal cation, an alkyl group, or is an acyclic anhydride, which itself may contain organo-onium; or Z is a substituted or unsubstituted, cyclic or acyclic alkyl group having from 4 to about 20 carbon atoms that is terminated with a group of the formula â€”COOA where A is a hydrogen atom or is a metal cation; each R is, independently, a hydrogen atom or an alkyl, aryl, alkenyl, or any combination thereof; each R can be substituted with chlorine, fluorine, bromine, cyano, â€”ORâ€³ or â€”COORâ€³ where Râ€³ is a C1 to C20 alkyl, aryl, aralkyl, or alkenyl, and any pair of the R groups with Q may together form to form a heterocyclic ring; one or more of the R groups may also be group of the formula Z where Z is as defined above; X is an organic or inorganic anion; and n is a number equal to the valence of the anion X; (3) a peroxide curative; and (4) optionally, a coagent.