High-temperature solution process for polyolefin manufacture
First Claim
1. A process which comprises polymerizing one or more olefins in solution in a reaction zone in a multi-stage reactor under adiabatic conditions at a temperature greater than 130°
- C. and a pressure greater than 200 psig in the presence of a catalyst system comprising;
(a) an activator; and
(b) an organometallic complex which comprises a Group 3-10 transition metal and a bridged indenoindolyl ligand of the general structure;
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Abstract
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.
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Citations
18 Claims
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1. A process which comprises polymerizing one or more olefins in solution in a reaction zone in a multi-stage reactor under adiabatic conditions at a temperature greater than 130°
- C. and a pressure greater than 200 psig in the presence of a catalyst system comprising;
(a) an activator; and
(b) an organometallic complex which comprises a Group 3-10 transition metal and a bridged indenoindolyl ligand of the general structure;
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- C. and a pressure greater than 200 psig in the presence of a catalyst system comprising;
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12. A process which comprises polymerizing ethylene, and optionally one or more 1-olefins, in solution in a reaction zone in a multi-stage reactor under adiabatic conditions at a temperature greater than 160°
- C. and a pressure greater than 500 psig in the presence of a catalyst system comprising;
(a) an alumoxane activator; and
(b) an organometallic complex which comprises a Group 4 transition metal and a bridged indenoindolyl ligand of the general structure;
- View Dependent Claims (13, 14, 15, 16, 17, 18)
- C. and a pressure greater than 500 psig in the presence of a catalyst system comprising;
Specification