Catalyst systems for Ziegler-Natta propene polymerisation

US7351678B2 · kind B2 · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Kartin Köhler · Dossenheim, DE
• Herbert Schumann · Berlin, DE
• Birgit Wassermann · Berlin, DE
• Wilfried Wassermann · Berlin, DE
• Katharina Lange · Berlin, DE
• Sebastian Dechert · Berlin, DE
• Markus Hummert · Dresden, DE
• Stefan Schutte · Berlin, DE
• Walter Kaminsky · Pinneberg, DE
• Andrea Eisenhardt · Hamburg, DE
• Björn Heuer · Hamburg, DE
• Andre Laban · Hamburg, DE

Key dates

• Filing date: Sep 11, 2002
• Grant date: Apr 1, 2008
• Expiry date: Feb 12, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F5/066
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to the use of nitrogenous aluminium organyl complexes of general formula (I) as co-catalysts in heterogeneous polymerisation reactions of propene. In said formula: R, R′, R1 and R1′ independently of one another represent branched or unbranched C1-C7 alkyl, cycloalkyl, alkenyl, cycloalkenyl, aryl or alkynyl; R2 represents unsubstituted, monoalkylated or polyalkylated and/or monofluorinated or polyfluorinated aromatic hydrocarbons from group (II); R3 and R4 independently of one another represent CH2, CF2 oder C(R1)2; m stands for 0, 1 or 2; n stands for 0, 1 or 2; o stands for 0 or 1, all independently of one another. Said systems exhibit improved characteristics in terms of activity and stereoselectivity in comparison to conventional co-catalysts such as AlEt3 and can act simultaneously as co-catalysts and stereoselectivity promoters