| abstract |
The present invention discloses a hot solution process for producing polyolefins. The olefin is polymerized at a temperature of about 130 ° C. or higher in the presence of an activator and an organometallic complex. Complexes include indenoindolyl ligands in which the complex is crosslinked. One portion of the ligand is a second indenoindolyl group, or a polymerization stable, cyclopentadienyl-type group having an extended pi electron system. Since the catalyst is activated quickly and completely even at low levels of alumoxane, the present invention provides an efficient method for producing high molecular weight (Mw> 100K) polyolefins. |