Fluoroelastomer compositions containing a tetraalkylammonium...

Details Fluoroelastomer compositions containing a tetraalkylammonium... Fluoroelastomer compositions containing a tetraalkylammonium...

C - Chemistry, Metallurgy

08

K

402/534

C08K 5/00 (2006.01) C08F 14/22 (2006.01) C08K 5/13 (2006.01) C08K 5/132 (2006.01) C08K 5/19 (2006.01) C08K 5/50 (2006.01)

Patent

CA 1331252

TITLE FLUOROELASTOMER COMPOSITIONS CONTAINING A TETRAALKYLAMMONIUM HALIDE AND VULCANIZATION ACCELERATOR ABSTRACT OF THE DISCLOSURE A fluoroelastomer composition that has enhanced adhesion to metal when cured which comprises: (a) an elastomeric copolymer of vinyli- dene 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: Image where R is H or an alkyl group or an aryl group and R' 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.

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