| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rubber composition for a tire tread with further improved low rolling resistance, wet grip performance and abrasion resistance compared to conventional levels. <P>SOLUTION: This rubber composition is formulated with 100-140 pts.wt. of a filler to 100 pts.wt. of a diene-based rubber including ≥80 wt.% of three kinds of rubber comprising emulsion-polymerized styrene-butadiene rubber (E-SBR), terminally modified solution-polymerized styrene-butadiene rubber (modified S-SBR) and natural rubber (NR); where the filler contains silica by ≥70 wt.%, the diene-based rubber contains the natural rubber by 10-25 wt.%, the weight ratio (E-SBR:modified S-SBR:NR) of the three kinds of rubber is (1-2):(2.5-4):1, the styrene content of the E-SBR and the modified S-SBR is each 35-40 wt.%, and the difference of glass transition temperatures between the E-SBR and S-SBR is ≤10°C. <P>COPYRIGHT: (C)2012,JPO&INPIT |
