US 7,351,678 B2 · Catalyst systems for Ziegler-Natta propene polymerisation

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

Claims16

Dependent claims

A nitrogen-containing organoaluminium complex of formula (I)

in which
(1) R1 and R1′ are CH3,
R and R′, independently of one another, are branched or unbranched C3-7-alkyl,
R2 is
R3 CH2,
m and o are 1, and n=0;
(2) R1 and R1′ are C2H5,
R and R′, independently of one another, are branched or unbranched C1-C7-alkyl,
R2 is
CH2,
m and o =1, and n =o;
(3) R, R′, R1 and R1′, independently of one another, are branched or unbranched C1-C7-alkyl,
R2 is
R4 is CH2,
n and o are 1, and
m is 0;
or
(4) R1 and R1′ are CH3,
R and R′, independently of one another, are branched or unbranched C3-C7-alkyl,
or
R1 and R1′ are C2H5
and
R and R′, independently of one another, are branched or unbranched C1-C7-alkyl,
R2 is
o is 1, and
m and n are 0.

23 more elements

Dependencies are inferred from the claim text.

Catalyst systems for Ziegler-Natta propene polymerisation

Life of this patent

Catalyst systems for Ziegler-Natta propene polymerisation

Life of this patent

Abstract

Claims16