RUBBER COMPOSITION AND PNEUMATIC TIRE USING SAME

摘要

To provide: a rubber composition which achieves higher silica dispersibility without lowering workability and hardness, while having excellently low fuel consumption properties; and a pneumatic tire which uses this rubber composition. A rubber composition which is obtained by blending 5-200 parts by mass of (B) silica relative to 100 parts by mass of (A) a diene rubber, 1-20% by mass of (C) a silane coupling agent relative to the silica, and 1-20% by mass of (D) a glycerol mono-fatty acid ester relative to the mass of silica, said glycerol mono-fatty acid ester being derived from a fatty acid having 8-24 carbon atoms. With respect to this rubber composition, 10 parts by mass or more in 100 parts by mass of the component (A) has a heteroatom-containing functional group in the main chain and/or at an end.