METALLARMERT GUMMILAMINAT HVOR GUMMIDELEN HAR FORBEDRET ADHESJON TIL EN METALLDEL I KONTAKT MED GUMMIBLANDINGEN

摘要

This disclosure relates to a method, a rubber skim stock and a product containing the skim stock having improved adhesion between a metal member and a contiguous rubber skim stock. The invention lies in a discovery that improved rubber-to-metal adhesion can be obtained by adding to an otherwise conventional rubber skim stock compound appropriate amounts of either paminobenzoic acid or a transition metal salt of paminobenzoic acid. In particular, the cobalt and nickel salts of p-aminobenzoic acid have been found to be effective. The method of this invention comprises the steps of mixing the p-aminobenzoic acid or transition metal salt of p-aminobenzoic acid into a rubber compound, forming this compound into contiguous relationship with a metal member in an unvulcanized product and vulcanizing the product to yield the end product.