Process and catalyst system for synthesizing random trans SBR with low vinyl microstructure

摘要: The process and catalyst system of this invention can be utilized to synthesize a highly random styrene-butadiene rubber having high trans content by solution polymerization. made the in tire tread rubbers that exhibit improved wear characteristics. This more specifically reveals for use exothermal polymerizations which consists essentially (a) an organolithium compound, (b) barium alkoxide (c) lithium alkoxide. subject further discloses synthesizing low vinyl comprises copolymerizing styrene 1,3-butadiene under isothermal conditions organic solvent presence