Ab block copolymers based on butadiene, isoprene and...

Details Ab block copolymers based on butadiene, isoprene and... Ab block copolymers based on butadiene, isoprene and...

C - Chemistry, Metallurgy

08

F

400/1125, 400/20

C08F 297/04 (2006.01) B60C 1/00 (2006.01) C08L 53/02 (2006.01)

Patent

CA 1328516

Abstract of the Disclosure AB block copolymers on the basis of butadiene, iso- prene and styrene are produced by anionic polymerisation. The block copolymers are composed of 40 to 75% of a block A based on butadiene (uniformly distributed vinyl group content 8 - 60%) 60 to 20% of a block B based on 0 - 60% butadiene, at least 10% isoprene, and 0 to 45% styrene, wherein the vinyl content of the diene units is 75 to 90%. These block copolymers exhibit a sub- stantially broadened damping curve and are useful for the manufacture of tyre treads.

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