Rubber composition and pneumatic tire using the same

摘要

The present invention provides a rubber composition in which increase in elastic modulus due to thermal fatigue is small, change in properties is prevented and durability is significantly improved and a pneumatic tire having a strip comprising the rubber composition. More specifically, the present invention provides a rubber composition comprising 100 parts by weight of (A) a rubber component comprising natural rubber and/or isoprene rubber, 4 to 6 parts by weight of (B) sulfur, 0.5 to 2.0 parts by weight of (C) a resin containing resorcin or a derivative thereof, 0.5 to 2.0 parts by weight of (D) a compound capable of donating a methylene group, and (E) a cobalt metallic salt. The present invention also provides a pneumatic tire having a strip comprising the rubber composition, which is located on a breaker edge.