| 摘要 |
PURPOSE:To obtain a composition having excellent mechanical characteristics, rubber elasticity, weather resistance and heat resistance, comprising a hydrogen ated block copolymer and/or a modified material thereof, alpha,beta-unsaturated nitrile- conjugated diene copolymer and/or a hydrogenated substance thereof and fluororubber. CONSTITUTION:A composition comprising (A) a hydrogenated material obtained by hydrogenating a block copolymer consisting of a vinyl aromatic compound polymer block and a conjugated diene compound polymer block and/or a modi fied material obtained by adding an unsaturated carboxylic acid (derivative) to the hydrogenated material, (B) a copolymer having the weight ratio of alpha,beta-un saturated nitrile/conjugated diene of 10/90-80/20 and 5,000-200,000 molecular weight and/or a hydrogenated substance thereof, and (C) fluororubber (preferably tetrafluoroethylene-hexefluoropropylene-vinylidene fluoride copolymer) in the weight ratio of A/B+C of 95/5-50/50 wherein the component B and/or C is optionally crosslinked. |
