Merck Patent Gmbh

Beiersdorf Ag

Björn Heuer

Herbert Schumann

Walter Kaminsky

Andrea Eisenhardt

Andreas B Kummer

Horst Argembeaux

Wilfried Wassermann

Stefan Schutte

Birgit Corinna Wassermann

Sebastian Dechert

Markus Hummert

Andre Laban

Katharina Lange

Julia Gerjets

Kartin Köhler

Manuela Köhler

Luciana Cemin

Anke Pilzner

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', Rand R&#x2032; independently of one another represent branched or unbranched C-Calkyl, cycloalkyl, alkenyl, cycloalkenyl, aryl or alkynyl; Rrepresents unsubstituted, monoalkylated or polyalkylated and/or monofluorinated or polyfluorinated aromatic hydrocarbons from group (II); Rand Rindependently of one another represent CH, CFoder C(R); 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 AlEtand can act simultaneously as co-catalysts and stereoselectivity promoters 

Catalyst systems for Ziegler-Natta propene polymerisation

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Hamburg, Germany

Björn Heuer