Patent ID: 8431661

Claim:
A process for adjusting the properties of a linear low density polyethylene while polymerizing ethylene and hexene to produce a linear low density polyethylene in which the amount of trimethylaluminum in a methylalumoxane solution is reduced within the range from 25 mole % to 1 mole % at a given hydrogen concentration in order to decrease the weight percent of medium density polyethylene component produced, prior to use as an activator, where the mole % trimethylaluminum is determined by 1 H NMR, on the basis of the aluminum content, of the solution prior to combination with any support and wherein: 1) the methylalumoxane solution is present in a catalyst system also comprising a hafnium metallocene transition metal compound; 2) the catalyst system, prior to combination with any support, has an aluminum to transition metal molar ratio of 175:1 or less; 3) the olefins comprise ethylene; and 4) a polymer comprising at least 50 mol % ethylene units is obtained.