Patent ID: 6806336
Filing Date: 2004-10-19
Classification: C08F

Abstract:
A process for solution polymerizing ethylene, higher alpha-olefin and diene having two polymerizable double bonds, the process comprising:A) reacting in a first step ethylene, higher alpha-olefin comonomer and optionally one or more dienes to produce a polymer composition comprising from 0 to less than 1 mol % of diene having one or two polymerizable double bonds, in the presence of a catalyst system; B) reacting in a second step ethylene, higher alpha-olefin comonomer and one or more dienes at least one of which is a diene having two polymerizable double bonds in the presence of a catalyst system, the amount of diene having two polymerizable double bonds being added to the reactor in the second step being more than 50% of the total diene added in the first and second step combined; and C) recovering a polymer product having from 0.02 to 2 mol % of units derived from the diene having two polymerizable double bonds, and a branching index of greater than 0.5; wherein the catalyst system in one or both steps is vanadium based.