RUBBER COMPOSITION AND PNEUMATIC TIRE MADE WITH THE SAME

The present invention provides a rubber composition improved in the heat resistance, which is suitable for a reinforcing rubber for tire sidewall portions and a bead filler rubber. Also, provided is a pneumatic tire produced using the rubber composition. The rubber composition comprises (A) a natural rubber and/or a synthetic diene rubber and (B) at least one compound selected from the group consisting of a compound represented by the following Formula I: R-S-S-A-S-S-R (I) wherein A represents an alkylene group having 2 to 10 carbon atoms, and R and R each independently represents a monovalent nitrogen-containing organic group; a citraconimide compound; and an acrylate compound. The pneumatic tire has a rubber layer for reinforcing tire sidewall and/or a bead filler each made of the rubber composition.