CATALYST SYSTEM FOR POLYMERIZATION OF AN OLEFIN

摘要

The present invention relates to a process for the preparation of a catalyst system suitable for olefin polymerization wherein the external electron donor is n-propyltriethoxysilane, and a catalyst system obtained or obtainable by said process. The invention also relates to a process for preparing a polyolefin using said catalyst system. The invention further relates to a polyolefin, in particular polyprolyene, obtainable by such a process, and shaped articles manufactured from such a polymer. The polymers produced using the catalyst system exhibit low volatiles and therefore have a reduced environmental and health impact.

主权项

1. A process for the preparation of a catalyst system suitable for olefin polymerization, said process comprising:
providing a magnesium-based support; optionally activating said magnesium-based support; contacting said magnesium-based support with a Ziegler-Natta type catalytic species, and optionally one or more internal electron donors to yield a procatalyst, and contacting said procatalyst with a co-catalyst and at least one external donor; wherein the at least one external electron donor is n-propyltriethoxysilane.