High-temperature solution process for polyolefin manufacture

The invention relates to a process for making polyolefins. In particular, the invention is a high-temperature solution process for making olefin polymers, especially polyethylenes. The process is catalyzed by an indenoindolyl transition metal complex. A high-temperature solution process for making p...

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Bibliographic Details
Main Authors Nagy, Sandor, Tsuie, Barbara M, Todd, William G, Holland, Charles S
Format Patent
LanguageEnglish
Published 29.06.2004
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Summary:The invention relates to a process for making polyolefins. In particular, the invention is a high-temperature solution process for making olefin polymers, especially polyethylenes. The process is catalyzed by an indenoindolyl transition metal complex. A high-temperature solution process for making polyolefins is disclosed. Olefins polymerize at greater than about 130° C. in the presence of an activator and an organometallic complex. The complex includes a bridged indenoindolyl ligand. One part of the ligand is a second indenoindolyl group or a polymerization-stable, cyclopentadienyl-like group having an extended pi-electron system. Because the catalysts activate quickly and thoroughly, even with low levels of an alumoxane, the invention provides an efficient way to make high-molecular-weight (Mw>100K) polyolefins.