Fluorelastomer compositions containing a tetraalkylammonium halide and vulcanization accelerator.

摘要

A fluoroelastomer composition that has enhanced adhesion to metal when cured which comprises: (a) an elastomeric copolymer of vinylidene fluoride and at least one other fluorinated monomer, (b) a vulcanization accelerator that is a quaternary phosphonium compound, (c) a crosslinking agent selected from the group consisting of a bisphenol or a polyhydroxy phenol of the formula: <CHEM> where R is H or an alkyl group or an aryl group and R min is an alkyl group or an aryl group, and (d) 0.02-0.8 weight percent based on the weight of the elastomeric copolymer of a metal adhesion promoter that is a tetraalkylammonium halide where each alkyl group contains 1-10 carbon atoms and the halide is a chloride, bromide or iodide. When cured in contact with metal the fluoroelastomer composition forms a strong bond with the metal surface. o