| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a rubber composition for a tire tread superior in grip performance on a wet road surface and a semi-wet road surface, and having improved wear resistance. <P>SOLUTION: This method includes a kneading step in which a mixture is kneaded at≥120°C, which is formed by blending a 15-50 pts. wt tackifier resin having a softening point of 130-170°C, a 80-180 pts. wt filler containing≥80 pts. wt silica and a compounding agent other than a vulcanization compounding agent with 100 pts. wt diene-based rubber, and further by blending a silane coupling agent having a 1-15 wt.% silica amount therewith, and a kneading temperature Ti is measured at everyΔt (second), to thereby adjust to be 70-350, a heat history amount converted at 150°C expressed by formula: HHS=Σ[Δt×exp(Ea/R×(1/To-1/Ti))] (HHS is the heat history amount converted at 150°C,Δt is a measuring interval (second), Ea=22,000 cal/mol, R=1.987 cal/(mol-K), To=150+273K, and Ti is the i-th kneading temperature (K)). <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
