Rubber composition for tire

Abstract

Abstract PURPOSE: A rubber composition for tire that contains more than a specific amount of a specific high-vinyl-content butadiene-styrene copolymer, thus showing low rolling resistance, high fracture resistance and high wearing resistance. CONSTITUTION: After copolymerization of styrene with 1,3-butadiene using an organolithium compound such as n-butyllithium, coupling reaction is effected using a metal halide to introduce butadienyl-metal (Si, Ge, Sn and/or Pb) bonds into the main chains up to more than 20wt%, preferably more than 40wt%. Further, the content of styrene bound to the chain is adjusted to 3W30wt% and of 1,2-bonds in butadiene to 60W95wt%. The resultant high vinyl-content butadiene-styrene copolymer is contained by at least 20pts.wt. per 100pts. of the composition. COPYRIGHT: (C)1982,JPO&Japio

Inventors

• 👤 Tatsuo Fujimaki
• 👤 Shinsuke Yamaguchi
• 👤 Kazuharu Yamada
• 👤 Seisuke Tomita

Bibliographic Details