Patent ID: 6758251
Filing Date: 2004-07-06
Classification: B60C,C08L,Y10T

Abstract:
A pneumatic tire having a component comprising a vulcanizable rubber composition comprising, based on 100 parts by weight of elastomer (phr),(A) from about 30 to 100 phr of high trans random SBR comprising from about 3 to about 30 percent by weight of styrene and a trans 1,4 butadiene content in the polybutadiene segments of the SBR of greater than 60 percent by weight, wherein said high trans random SBR is produced by a process that comprises copolymerizing styrene and 1,3-butadiene in an organic solvent in the presence of a catalyst system that is comprised of (i) an organolithium compound, (ii) a group IIa metal salt selected from the group consisting of group IIa metal salts of amino glycols and group IIa metal salts of glycol ethers, and (iii) an organometallic compound selected from the group consisting of organoaluminum compounds and organomagnesium compounds; and (B) from about zero to about 70 phr of at least one additional elastomer.