| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a tread rubber composition for a studless tire, reducing the strain dependence of hardness of the tread rubber, while securing the rigidity on a non-snow-covered road, having a good performance on snow and ice and excellent in abrasion resistance. <P>SOLUTION: This tread rubber composition for the studless tire is provided by containing a diene-based rubber having≥80 mass% total content of a natural rubber and polybutadiene rubber, silica, and carbon black, as to the diene-based rubber, containing≥10% modified polybutadiene rubber with a compound expressed by formula (1): R<SP>1</SP>R<SP>2</SP>R<SP>3</SP>Si-(CH<SB>2</SB>)<SB>n</SB>-NR<SB>4</SB>R<SB>5</SB>, and having 10 to 150 pts.mass silica content and 3 to 50 pts.mass carbon black content based on 100 pts.mass diene-based rubber. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
