Polymerization of olefins in the presence of...

C - Chemistry – Metallurgy – 07 – F

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C07F 7/18 (2006.01) C08F 10/00 (2006.01) C08F 110/02 (2006.01) C08F 110/06 (2006.01)

Patent

CA 2308870

The invention relates to dialkoxysilacyclohexanes, the process for their preparation and their use as electron donor in the polymerization processes of olefins such as propylene or ethylene. The presence of dialcoxysilacyclohexanes in the middle of polymerization of at least one olefin results in a significant increase in the productivity of polyolefins and a significant increase in the HI of said polyolefin. In addition, the dialcoxysilacyclohexane preserves morphology in slurry and gas phase polymerization.

L'invention concerne des dialcoxysilacyclohexanes, leur procédé de préparation et leur utilisation en tant que donneur d'électrons dans les procédés de polymérisation des oléfines comme le propylène ou l'éthylène. La présence de dialcoxysilacyclohexanes dans le milieu de polymérisation d'au moins une oléfine se traduit par une augmentation sensible de la productivité en polyoléfine et par une augmentation sensible du HI de ladite polyoléfine. De plus, le dialcoxysilacyclohexane jour un rôle de protecteur de morphologie dans les procédés de polymérisation en suspension et en phase gazeuse.

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