Processes for transitioning between ziegler-natta and alumoxane-based single-site polymerization catalysts

摘要

Processes for transitioning among polymerization catalyst systems, preferably catalyst systems that are incompatible with each other. In particular, the processes relate to transitioning among olefin polymerization reactions utilizing Ziegler-Natta catalyst systems, metallocene catalyst systems and other MAO-based single site catalyst systems.