Living polymerization of olefins to produce copolymer

Details Living polymerization of olefins to produce copolymer Living polymerization of olefins to produce copolymer

C - Chemistry, Metallurgy

08

F

C08F 297/06 (2006.01)

Patent

CA 2174099

The present invention provides a process for the living polymerization of aromatic, preferably styrenic monomers initiated from a living polyolefin, particularly polyisobutylene, chain end and thereby provides an efficient method for the preparation of block copolymers having polyolefin mid-blocks and styrenic end blocks. Polyisobutylene mid-blocks and styrenic end blocks comprising para-methylstyrene alpha-methylstyrene, indene and the like are preferred.

La présente invention concerne un procédé de polymérisation vivante de monomères aromatiques, de préférence des monomères styréniques, initiée à partir d'une extrémité de chaîne polyisooléfine vivante, notamment une extrémité de chaîne polyisobutylène. Cette invention concerne donc un procédé efficace de préparation de copolymères blocs possédant des blocs centraux polyoléfiniques et des blocs terminaux styréniques. Les copolymères préférés comportent des blocs centraux polyisobutylène et des blocs terminaux styréniques comprenant un para-méthylstyrène, un alpha-méthylstyrène, un indène et équivalent.

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