Manufacture of polyethylenes

摘要

Blends of two or more polyethylenes are made by reacting ethylene with an oligomerization catalyst that forms alpha-olefins, and two polymerization catalysts, one of which under the process conditions copolymerizes ethylene and alpha-olefins, and the other of which under process conditions does not readily copolymerize ethylene and alpha-olefins. The blends may have improved physical properties and/or processing characteristics.