RUBBER COMPOSITION FOR TIRE AND PNEUMATIC TIRE PRODUCED BY USING THE COMPOSITION AS BEAD FILLER

摘要

PROBLEM TO BE SOLVED: To provide a rubber composition having improved balance of elongation at break and high elastic modulus. SOLUTION: The rubber composition for tire comprises (A) 100 pts.wt. of a diene rubber containing (i) 50-90 pts.wt. of natural rubber and/or polyisoprene rubber and (ii) 10-50 pts.wt. of a styrene-butadiene copolymer rubber and (B) 0.1-6 pts.wt. of a carboxylic acid-containing disulfide amine salt compound expressed by formula (I). The invention further provides a pneumatic tire produced by using the composition as a bead filler. COPYRIGHT: (C)2008,JPO&INPIT