| 摘要 |
PURPOSE:To obtain a rubber compsn. which can suppress changes in tack with time and temp. dependancy and improve workability when it is molded by compounding a diene rubber with a specified amt. of a liq. polyisoprene rubber. CONSTITUTION:A diene rubber (e.q. natural rubbers, butadiene rubbers, styrene- butadiene copolymer rubbers, etc.) is compounded with 0.5-2 pts.wt. liq. polyisoprene rubber (a material with a wt.-average mol.wt. of 20,000-70,000 is pref.) in the sum of the diene rubber and the liq. polyisoprene rubber 100 pts.wt. By said procedure, it is possible to suppress change in tack with time and temp. dependancy and therefore, it is possible to improve workability when it is molded by using this rubber compsn. |
