Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2005-08-23
2005-08-23
Wu, David W. (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S172000, C526S153000, C526S129000, C526S130000, C526S145000, C526S348000, C526S352000
Reexamination Certificate
active
06933354
ABSTRACT:
Single-site catalyst systems useful for polymerizing olefins are disclosed. The catalyst systems comprise an organometallic complex and an activator. The complex includes a Group 3-10 transition metal, M, and at least one indenoindolyl ligand that is pi-bonded to M. The activator is a reaction product ofan alkylaluminum compound and an organoboronic acid. Catalyst systems of the invention significantly outperform known catalyst systems that employ a metallocene complex and similar aluminoboronate activators.
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Lynch Michael W.
Meverden Craig C.
Nagy Sandor
Neal-Hawkins Karen L.
Equistar Chemicals LP
Lee Rip A
Schuchardt Jonathan L.
Wu David W.
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