| 摘要 |
PURPOSE:The titled composition, obtained by incorporating carbon black and a process oil in a blend rubber of a specific solution polymerization styrene-butadiene copolymer rubber with natural rubber, and having improved low rolling resistance and processability without deteriorating wet skid resistance nor abrasion resistance. CONSTITUTION:A resin composition obtained by incorporating (A) 100pts.wt. blend rubber consisting of a solution polymerization styrene-butadine copolymer rubber with <=20wt% styrene content, <=20wt% 1,2-vinyl bond content in the butadiene component and <=-70 deg.C glass transition temperature and <=50pts.wt., preferably <=40pts.wt. natural rubber with (B) 40-70pts.wt., preferably 45- 65pts.wt. carbon black and (C) <=40pts.wt. process oil. 2-6pts.wt. zinc oxide, 1-3pts.wt. stearic acid, 1.5-3.5pts.wt. sulfur and 0.5-2.5pts.wt. vulcanization accelerator, etc. as other components are usually incorporated therewith. |
