Patent ID: 8822612

Claim:
A process for preparing a polyethylene that is characterised by simultaneously having a content of short chain branching of at least 20 short chain branches per 1000 methylene groups and an activation energy of less than 50 kJ/mole, the process comprising: a) supporting a late transition metal catalyst component onto an activating support to obtain an activated catalyst system, wherein the activating support comprises at least 10 wt % of aluminium, based on the total weight of the activating support; b) injecting said activated catalyst system in a polymerisation reactor with ethylene monomer, in the absence of added comonomer; c) injecting a scavenger selected from trialkylaluminium in the polymerisation reactor simultaneously with or before or after step b); d) maintaining at a polymerisation temperature of at least 70° C.; e) retrieving the polyethylene product.