| 摘要 |
PURPOSE:To obtain a composition having excellent weather resistance and heat aging resistance as well as excellent mechanical strength and capable of providing vulcanized rubber by blending a conjugated diene based rubber with ethylene.alpha-olefin based copolymer rubber and styrene based oligomer. CONSTITUTION:The aimed composition obtained by blending 100 pts.wt. total amount of (A) 5-95 pts.wt., preferably 40-90 pts.wt. conjugated diene based rubber, preferably NR, BR, SBR, etc., with (B) 95-5 pts.wt., preferably 60-10 pts.wt. ethylene.alpha-olefin based copolymer having molar ratio of ethylene/alpha-olefin (preferably propylene or 1-butene) of 50/50-95/5 and capable of containing a polyene compound within the range without exceeding 50 in iodine value with (C) 1-50 pts.wt., preferably 5-40 pts.-wt. styrene based oligomer having 400-2000, preferably 500-1500 number-average molecular weight and as necessary softening agent, reinforcing agent, vulcanizing agent, etc. |
