Catalyst system containing an anionic initiator and a...

Details Catalyst system containing an anionic initiator and a... Catalyst system containing an anionic initiator and a...

C - Chemistry, Metallurgy

08

F

252/123, 402/448

C08F 4/48 (2006.01) C08F 36/04 (2006.01)

Patent

CA 1192538

Abstract A process and catalyst system is disclosed herein for the preparation of (co)polymers having a 1,2-microstructure of between about 20 and about 65 percent. These (co)polymers are prepared in a hydrocarbon or non-polar solvent from a monomer system which contains at least one 1,3-diene monomer. The catalyst system which is employed in the produc- tion of the (co)polymer is a combination of an anionic initiator based on lithium and a phosphine oxide modifier which is substituted with three saturated heterocyclic rings, each hetero ring con- taining one nitrogen atom and either four, five or six carbon atoms.

429923

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