| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire capable of enhancing the durability thereof, and reducing fuel consumption, and having excellent run-flat performance. SOLUTION: The pneumatic tire 10 has a reinforcing rubber layer 9 having a substantially crescent-shaped section on the inner side of a carcass layer 5 of a sidewall 2. The reinforcing rubber layer 9 is composed of a rubber composition containing 40-80 pts.wt. carbon black with a nitrogen adsorption specific surface area (N<SB>2</SB>SA) being≥20m<SP>2</SP>/g and <30m<SP>2</SP>/g, dibutyl phthalate (DBP) oil absorption being 50-155 cm<SP>3</SP>/100g with respect to 100 pts.wt. a diene-based rubber component which is polymerized by using organic lithium catalyst with its molecular terminal modified with a modification agent, and contains 15-50 pts.wt. styrene diene rubberThe loss tangent (tanδ) of the rubber composition measured at 70°is <0.07. COPYRIGHT: (C)2009,JPO&INPIT |
