To provide a rubber composition superior in rolling resistance performance, wet breaking performance and processability without electrostatic troubles such as a radio noise, and a pneumatic tire using it.
This rubber composition comprises a rubber component including a rubbery polymer (A) of 20-60 wt.% of a conjugated diene polymer or a conjugated diene-styrene copolymer modified by a multifunctional compound having a diglycidylamino group and a rubbery polymer (B) of 20-60 wt.% of a conjugated diene polymer or a conjugated diene-styrene copolymer having a primary amino group and an alkoxysilyl group combined to a polymer chain, and a reinforcing material including carbon black and an inorganic filler, wherein its volume resistivity is less than 10
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Masato Tsuda
Tetsuji Nakamura
Katsuyuki Tomita