Method of bonding fibers to hydrogenated nitrile rubber

Abstract

A method of bonding fibers to hydrogenated nitrile rubber which comprises: the first step of treating fibers with an activating agent selected from the group consisting of polyisocyanates, epoxy compounds and silane coupling agents; the second step of dipping the fibers into a resorcinol/formalin/latex solution; the third step of treating the fibers with an adhesive composition which comprises (a) 1-90% by weight of polymers, based on the composition, the polymers containing halogens in amounts of 25-70% by weight based on the polymers, and (b) 10-99% by weight of polyisocyanates, aromatic polynitroso compounds or polyepoxy compounds; and the fourth step of placing the fibers in close contact with hydrogenated nitrile rubber and vulcanizing the rubber together with the fibers. The resultant composites have large strength and high resistance to fatigue from repeated flexure.

Dependencies are inferred from the claim text.