Fluoroelastomer composition with improved bonding properties.

摘要

A curable fluoroelastomer composition comprising: (A) fluoroelastomer gum comprising interpolymerized, repeating units derived from vinylidene fluoride, tetrafluoroethylene, and copolymerizable hydrocarbon olefin, (B) polyhydroxy compound, (C) organo-onium compound, and (D) RfSO2CHR<7>SO2Rf where R<7> is selected from H, Br, Cl, I, alkyl radicals having 1 to 20 carbon atoms, alkenyl radicals having 3 to 4 carbon atoms, aryl radicals having up to 10 carbon atoms and alkaryl radicals having up to 10 carbon atoms, and Rf is a monovalent fluoroaliphatic radical having 1 to 20 carbon atoms, where the amount of component (D) in the elastomeric composition is sufficient to result in greater adhesion of the elastomeric composition, after curing, to surface coated with a primer composition comprising aminosilane compound, than can be achieved between an elastomeric composition comprising (A), (B), and (C), after curing, and surface coated with said primer composition comprising aminosilane compound