Diethylaluminum alkoxide/aluminum alkyl co-catalyst for improved polymerization yield

摘要

This invention relates to a catalyst system using a diethylaluminum alkoxide-aluminum alkyl cocatalyst and to a process for polymerization of olefins using the catalyst system. Use of this catalyst system increases polymerization yield. The diethylaluminum alkoxide is preferably diethylaluminum ethoxide and the aluminum alkyl is preferably triethyl aluminum. The mole-to-mole ratio of diethylaluminum alkoxide to aluminum alkyl ranges from 0.05 to 0.2. This invention is effective for the aluminum/transition metal ratio for the polymerization of olefins ranges from about 100 to about 500. Polymerization yield increases of greater than 10% are realized.