Patent ID: 7199195

Claim:
A process for making an ethylene/α-olefin copolymer having a density of at least 0.953 g/cm 3 and a Bent Strip ESCR, T 50 of at least 175 hours in a single reactor, said process comprising contacting, under polymerization conditions, ethylene, one or more α-olefins, hydrogen and a bimetallic polymerization catalyst comprising a Ziegler component and a metallocene component, the combination of Ziegler component and metallocene component being selected to result in a copolymer having at least a HMW polymer component and at least a LMW polymer component, the HMW polymer component having a higher average molecular weight than the LMW polymer component and comprising at least 30 mol % of the total α-olefin incorporated into the copolymer.