Transparent block copolymers and production thereof

Details Transparent block copolymers and production thereof Transparent block copolymers and production thereof

C - Chemistry, Metallurgy

08

L

C08L 53/02 (2006.01) B29C 45/00 (2006.01) C08F 212/08 (2006.01) C08F 236/04 (2006.01) C08F 297/04 (2006.01) C08J 5/00 (2006.01)

Patent

CA 2442418

The invention relates to a novel transparent block copolymer and its process for the manufacture. The process comprises a first partial killing of at least the living copolymeric species R-S1-B1-M with a multi-functional deactivation agent where S1 is a monovinyl-substitued aromatic homopolymer, B1 is a conjugated dime homopolymer, M is an alkali metal and R an alkyl (RM being an initiator) and further comprises a second total deactivation of at least the living tapered block copolymeric species R-S1-B1-B2/S2-M (obtained by adding a feed B2/S2 to the reaction medium) by a mono-functional deactivation agent (the terminating agent).

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