TUBBER COMPOSITION FOR TIRE TREADS

摘要

Compsn. for tire treads comprises (i) styrene/butadien copolymer 20- 80 wt.% (as rubber component); styrene contents=20 wt.%, formed by extending styrene/butadien copolymer rubber (1,2-butadien bond unit is below 20%) with extender oil, Moonet viscosity (ML1-4; 100 deg.C) =53, (ii) at least one different diens rubber 80-20 wt.% (to become 100 wt.% together with extender oil-free styrene/butadien copolymer rubber) and (iii) carbon black 40-70 wt.% to total rubber component 100 wt.%.