| 摘要 |
PROBLEM TO BE SOLVED: To obtain a rubber-code composite material capable of improving adhesion of an organic fiber to rubber in addition to retention of the characteristics of the organic fiber by treating the organic fiber with 2 kinds of treating liquid then vulcanizing the organic fiber integrally with green rubber. SOLUTION: At first, organic fiber is treated with a first treating liquid formulated with (A) an epoxy resin, (B) a styrene-butadiene copolymer rubber latex at weight ratio of styrene/butadiene of 5/95-45/55, and (C) a thermally reactive water-soluble polyurethane resin of the formula (A is an organic polyisocyanate residual group bearing 3-5 functional groups; Y is an active hydrogen of an isocyanate-blocking compound; Z is an active hydrogen of a compound bearing both an active hydrogen and an anion-forming group; X is an active hydrogen of a polyol with an average molecular weight of <=5,000 having 2-4 OH groups; (n), (p + m) are each 2-4, m>=0.25). Then, the treated fiber is treated with a second treating liquid comprising a resorcinol- formaldehyde condensed product and a rubber latex, and is integrally vulcanized with green rubber. |
