| 摘要 |
PROBLEM TO BE SOLVED: To provide a rubber composition suitably used in a heavy-duty pneumatic tire and an off-road tire and having excellent low heat build-up properties and good operation efficiency and to provide the pneumatic tire using the rubber composition. SOLUTION: The rubber composition is obtained by compounding at least one kind of rubber component selected from the group consisting of natural rubber and synthetic rubbers with a compound having a moiety Q containing one or more dipolar nitrogens represented by A1-C(A2)=N(A3)→O, A1-C≡N→O and A1-C≡N→N-A4 (wherein, A1 to A4 are each a hydrogen or a≤20C group or a linking group to B) and a moiety B containing a 4- to a 6-membered nitrogen-containing heterocycle containing an oxygen or a sulfur and silica and simultaneously including a partial ester compound of maleic acid with an oxypropylene derivative or a polyoxypropylene derivative. The pneumatic tire is prepared by using the rubber composition in a tire member. COPYRIGHT: (C)2007,JPO&INPIT
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