Processes for transitioning between metallocene and...

C - Chemistry – Metallurgy – 08 – F

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C08F 2/38 (2006.01) C08F 2/34 (2006.01) C08F 10/00 (2006.01) C08F 210/16 (2006.01)

Patent

CA 2508756

Processes for transitioning among polymerization catalyst systems, preferably catalyst systems that are incompatible with each other. In particular, the processes relate to transitioning from olefin polymerizations utilizing metallocene catalyst systems to olefin polymerizations utilizing traditional Ziegler-Natta catalyst systems.

La présente invention concerne des traitements devant permettre les transitions entre systèmes catalyseurs de polymérisation, de préférence entre systèmes catalyseurs incompatibles entre eux. L'invention concerne plus particulièrement la réalisation des transitions qui, à partir des polymérisations d'oléfines utilisant des systèmes de catalyseurs métallocènes et aboutissent à des polymérisations d'oléfines utilisant des systèmes traditionnels de catalyseurs de Ziegler-Natta.

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