Bridged bi-aromatic ligands, catalysts, processes for...

Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...

Reexamination Certificate

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C502S103000, C502S122000, C502S123000, C502S150000, C502S162000, C502S168000, C502S171000, C502S172000, C568S642000, C568S631000, C564S280000

Reexamination Certificate

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06841502

ABSTRACT:
New ligands and compositions with bridged bis-aromatic ligands are disclosed that catalyze the polymerization of monomers into polymers. These catalysts with metal centers have high performance characteristics, including higher comonomer incorporation into ethylene/olefin copolymers, where such olefins are for example, 1-octene, propylene or styrene. The catalysts also polymerize propylene into isotactic polypropylene.

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