Carbon fiber cord for rubber reinforcement and process for producing the same

摘要

A carbon fiber cord for rubber reinforcement, comprising (A) a carbon fiber bundle comprising carbon fibers selected from the group consisting of carbon fibers having coated thereon from 0.1 to 1% by weight of at least one epoxy resin composition and carbon fibers having coated thereon from 0.5 to 15% by weight of a metal selected from the group consisting of copper, nickel, zinc, and cobalt, and (B) a phenol-formalin-rubber latex type adhesive for rubber impregnated to said carbon fiber bundle in an amount of from 10 to 30% by weight, and said epoxy resin is selected from the group consisting of (1) a composition comprising an epoxy resin and from 5 to 20% by weight of a compound represented by formula (I) <IMAGE> (I) wherein A represents -C2H4O)l or -C2H4O)n(C3H6O)m, wherein l and n each represents an integrer of from 18 to 50, m represents an integer of from 1 to 50, and n/m is from 1 to 25, (2) a composition comprising a urethane-modified epoxy resin represented by formula <IMAGE> (II) wherein A represents an aliphatic or aromatic hydrocarbon group, m and n each represents 0 or an interger of 1 or more, and the sum of n and m is from 2 to 10, and (3) a composition comprising polybutadiene epoxide resin containing a glycidyl group and having an epoxy equivalent of from 1,000 to 2,000, which is represented by formula (III) <IMAGE> (III) <IMAGE> wherein n represents an integer of from 4 to 22, and l/m is from 2.3 to 9.