Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2009-07-22
2010-12-28
Lee, Rip A. (Department: 1762)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S161000, C526S134000, C526S348000, C526S348200, C526S348500, C526S348600, C526S351000, C526S352000, C526S901000, C526S941000, C556S052000, C556S051000, C502S103000
Reexamination Certificate
active
07858718
ABSTRACT:
Catalysts useful for polymerizing olefins are disclosed. The catalysts comprise an activator and a Group 4 metal complex that incorporates a dianionic, tridentate 2-aryl-8-anilinoquinoline ligand. In one aspect, supported catalysts are prepared by first combining a boron compound having Lewis acidity with excess alumoxane to produce an activator mixture, followed by combining the activator mixture with a support and the tridentate, dianionic Group 4 metal complex. The catalysts are easy to synthesize, support, and activate, and they enable facile production of high-molecular-weight polyolefins.
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Chevalier Reynald
Ivchenko Pavel V.
Lukesova Lenka
Lynch Michael W.
Mihan Shahram
Equistar Chemicals LP
Lee Rip A.
Schuchard Jonathan L.
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