| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a rubber composition for a sidewall in which low fuel consumption nature and flex crack-proof nature can be improved with sufficient balance at high dimension, and which can also assure control stability and fracture strength; and to provide a pneumatic tire which uses the composition for the sidewall of the tire. <P>SOLUTION: The rubber composition for a sidewall includes: a rubber component which contains a compound modified butadiene rubber expressed by formula (1), silica, sulfur, and a compound expressed by formula (2): R<SP POS="POST">6</SP>-S-S-A-S-S-R<SP POS="POST">7</SP>. In formula (1), R<SP POS="POST">1</SP>, R<SP POS="POST">2</SP>and R<SP POS="POST">3</SP>denote a branching or not branching alkyl group, a branching or not branching alkoxy group, a branching or not branching silyloxy group, a branching or not branching acetal group, a carboxyl group, a mercapto group or derivatives thereof, R<SP POS="POST">4</SP>and R<SP POS="POST">5</SP>denote a hydrogen atom or a branching or not branching alkyl group, and n denotes an integer. In formula (2), A denotes a branching or not branching 2-10C alkylene group, and R<SP POS="POST">6</SP>and R<SP POS="POST">7</SP>are the same or different and denote a monovalent organic group containing a nitrogen atom. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
