Patent ID: 6372864
Filing Date: 2002-04-16
Classification: C08F,Y10S

Abstract:
A solution polymerization process characterized by:A) polymerizing ethylene optionally with one or more C3-12 alpha olefins, in solvent in a first stirred polymerization reactor at a temperature of from 80 to 200Â° C. and a pressure of from 1500 to 5000 psi in the presence of (a) a catalyst which is an organometallic complex of a group 3, 4 or 5 metal, characterized by having at least one phosphinimine ligand; and (b) a cocatalyst which contains an alumoxane; and B) passing said first polymer solution into a second stirred polymerization reactor and polymerizing ethylene, optionally with one or more C3-12 alpha olefins, in said second stirred polymerization reactor in the presence of (a) a catalyst which is an organometallic complex of a group 3, 4 or 5 metal, characterized by having at least one phosphinimine ligand; and (b) a cocatalyst which contains an ionic activator.