| 摘要 |
PURPOSE:To obtain a composition having excellent heat resistance, fatigue resistance and endurance and used for a rubber vibration insulator of car component such as engine mount by blending a rubber component consisting of a natural rubber, etc., and ethylene-alpha-olefin copolymer rubber, etc., with an organic peroxide. CONSTITUTION:The objective composition obtained by blending a rubber component consisting of (A) 50-90wt.% natural rubber and/or polyisoprene rubber and (B) 10-50wt.% ethylene-alpha-olefin nonconjugated-diene copolymer rubber and/or ethylene-alpha-olefin copolymer rubber with an organic peroxide as a crosslinking agent at a ratio of 2-7 pts.wt., based on 100 pts.wt. rubber component. The weight ratio of the component A to the component B is preferably (80/20) to (60/40). 3-12Calpha-Olefin, especially propylene is preferably used as the alpha-olefin of the component B. |
