Adhesive compositions for adhering organic synthetic fibers to nitrile group-containing highly saturated copolymer rubbers, method for treating organic synthetic fibers using same, and method for adhering organic synthetic fibers to rubbers using same

An adhesive composition for adhering an organic synthetic fiber to a nitrile group-containing highly saturated copolymer rubber, said composition comprising

• (A) a nitrile group-containing highly saturated copolymer rubber latex having an iodine value of not more than 120 and obtained by hydrogenating with hydrogen in the presence of a hydrogenation catalyst an emulsion polymerized nitrile group-containing unsaturated copolymer rubber latex in the state of latex to selectively hydrogenate a carbon-carbon double bond of the nitrile group-containing unsaturated copolymer constituting said latex, said rubber comprising 30 to 90% by weight of a conjugated diene unit, 10 to 50% by weight of an alpha, beta-ethylenically unsaturated nitrile unit, and 0 to 20% by weight of an ethylenically unsaturated monomer unit copolymerizable therewith, said hydrogenation catalyst being selected from a palladium salt of a carboxylic acid, dichloro (norbornadiene) palladium and ammonium hexachloropalladate, said hydrogenation being conducted, at a temperature 0.degree. to 300.degree. C. and a hydrogen pressure of atmospheric pressure to 300 kg/cm.sup.2, in the presence of an organic solvent which can dissolve or swell the nitrile group-containing unsaturated copolymer, and
• (B) a resorcinol-formaldehyde resin.