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US 5,854,166 AGranted
Synthesis and use of (perfluoroaryl) fluoro-aluminate anion
AssigneeNorthwestern University
InventorsTobin J. Marks, You-Xian Chen
Life of this patent
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Abstract
A trityl perfluorophenyl alumninate such as tris(2,2',2"-nonafluorobiphenyl) fluoroaluminate (PBA.sup.-) and its role as a cocatalyst in metallocene-mediated olefin polymerization is disclosed.
Claims11
A catalytic complex of the formula:
- (CpCp'MR).sup.+ AR'R"R'"F.sup.- where
- Cp and Cp' is each a group containing a cyclopentadienyl ligand
- M is Ti, Zr, Hf, Th, or U
- R is an alkyl or aryl group (C.ltoreq.20), or hydride
- A is Al, Ga, or In
- R', R", and R'" is each a fluorinated phenyl, fluorinated biphenyl or fluorinated polycyclic fused ring group.
3 more elements
A method of preparing a catalyst composition including the step of adding tris(2', 2", 2'"-nonafluorobiphenyl fluoroaluminate to a cationic metallocene.
A method of polymerizing an alpha olefin comprising the step of adding the catalyst (CpCp'MR).sup.+ AR'R"R'"F.sup.- to the alpha olefin where
- Cp and Cp' is each a group containing a cyclopentadienyl ligand
- M is Ti, Zr, Hf, Th, or U
- R is an alkyl, or aryl group (C.ltoreq.20), or hydride
- A is Al, Ga, or In
- R', R", and R'" is each a Fluorinated phenyl, fluorinated biphenyl or fluorinated polycyclic fused ring group.
2 more elements
Dependencies are inferred from the claim text.