Method for polymerizing conjugated diolefins (dienes) with...

C - Chemistry – Metallurgy – 08 – F

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C08F 236/10 (2006.01) C08F 36/04 (2006.01)

Patent

CA 2337423

Conjugated diolefins, optionally combined with other unsaturated compounds that may be copolymerized with diolefins are polymerized by conducting polymerization of the diolefins in the presence of catalysts based on compounds of rare earth, cyclopentadiene and organoaluminum compounds in the presence of aromatic vinyl compounds as solvents at temperatures ranging from - 30 ~C to +100 ~C. The invention provides a simple method for producing copolymer solutions such as styrol-butadiene-copolymers having different styrol content and different contents of 1,2- and cis-units in aromatic vinyl compounds in relation to the diolefin, which can be further processed to obtain ABS or HIPS.

Des dioléfines, éventuellement en combinaison avec d'autres composés insaturés pouvant être copolymérisés avec les dioléfines, sont polymérisées en effectuant la polymérisation des dioléfines en présence de catalyseurs à base de composés des terres rares, de cyclopentadiènes et de composés organo-aluminiques, en présence de composés vinyliques aromatiques utilisés comme solvants, à des températures de -30 à +100 ·C. Le procédé selon l'invention permet de fabriquer de manière simple, des solutions de copolymères, par exemple de copolymères styrol-butadiène, à teneurs variées en styrol, ainsi qu'à teneurs variées, par rapport à la dioléfine, en motifs 1,2 et cis dans des composés vinyliques aromatiques, pouvant être ultérieurement traités pour obtenir de l'ABS ou de l'HIPS.

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