RUBBER COMPOSITION, COMPOSITE MATERIAL, AND PROCESS FOR PRODUCING COMPOSITE MATERIAL

摘要

A rubber composition comprising a rubber, a crosslinking agent, and a specific organonickel salt; a composite material obtained by directly bonding the rubber composition to a metallic material comprising either a metal having higher ionization tendency than nickel or an alloy of the metal while crosslinking the composition; and a process for producing a composite material which comprises heating the rubber composition kept in contact with a metallic material comprising either a metal having higher ionization tendency than nickel or an alloy of the metal to thereby directly bond the composition to the metallic material and crosslink the composition. Thus, a composite material excellent in interfacial adhesion to the metallic material can be obtained by the direct crosslinking/bonding method without the need of subjecting the metallic material to a surface treatment such as coating with an adhesive or plating.