Catalyst system for the Ziegler-Natta polymerization of olefins

US6534606B2 · kind B2 · utility

Assignee

• MERCK PATENT GESELLSCHAFT MIT BESHRANK TER HAFTUNG · DE

Inventors

• Katrin Kohler · Göttingen, DE
• Eike Poetsch · Mühltal, DE
• Herbert Schumann · Berlin, DE
• Sebastian Dechert · Berlin, DE
• Walter Kaminsky · Pinneberg, DE
• Andre Laban · Hamburg, DE
• Manfred Arnold · Meckenbeuren, DE
• Jana Knorr · Dessau, DE
• Birgit Wassermann · Berlin, DE

Key dates

• Filing date: Mar 8, 2001
• Grant date: Mar 18, 2003
• Expiry date: May 3, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F110/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Described are catalyst systems having aluminium alkyl complexes of the formula (I) described herein applied to magnesium chloride, SiO2 or SiO2 in combination with MgCl2 as support in the presence of titanium halides or vanadium halides and internal and, if desired, external donors act both as cocatalysts and as stereoselectivity promoters in heterogeneous polymerizations of &agr;-olefins. Also described are polymerization methods using these catalyst systems.