Styrene-butadiene copolymers with high styrene content

Details Styrene-butadiene copolymers with high styrene content Styrene-butadiene copolymers with high styrene content

C - Chemistry, Metallurgy

08

F

152/124, 402/7.3

C08F 8/42 (2006.01) C08C 19/44 (2006.01)

Patent

CA 1185392

Abstract of the Disclosure A styrene-butadiene copolymer having a high styrene content is disclosed, which is obtained by polymerizing styrene and butadiene in a hydrocarbon solvent in the presence of an organolithium compound and, if necessary, a Lewis base and then coupling with a tin halide compound. This copolymer contains in its main chain at least 30 wt% of polymer having a tin-carbon bond and has a bound styrene content of more than 25 wt% but not more than 60 wt% and a content of vinyl bond in butadiene portion of not less than 30% but less than 50%.

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