| 摘要 |
<p>The present invention relates to a polymerisation process and in particular to a process for the copolymerisation of ethylene and an ±-olefin comonomer having 7 to 10 carbon atoms in a fluidised bed gas phase reactor in the presence of a multi-site Ziegler-Natta polymerisation catalyst characterised in that (i) said process is operated in condensed mode, (ii) the amount of said ±-olefin is maintained below that at which substantial condensation in the reactor occurs and (iii) at least one of the following apply:
a) the catalyst has an uptake rate of 1-octene of at least 700;
b) the polymerisation is performed in the presence of an activity promoter.</p> |
