IMPROVED PROCESSING POLYETHYLENES

摘要

Polyethylenes made from ethylene and a series of .alpha.-olefins using a catalyst that copolymerizes ethylenes and .alpha.-olefins usually have excellent melt processing characteristics, especially in uses where high zer o shear viscosity and low high shear viscosity are desirable. These polyethylenes are preferably made by forming the .alpha.-olefins in situ fro m ethylene during the polymerization process. The polyethylenes are especially useful in blow molding, extrusion or extruded blown film processes.