Substituted pyridyl amine catalysts and processes for...

Details Substituted pyridyl amine catalysts and processes for... Substituted pyridyl amine catalysts and processes for...

2006-08-08

2006-08-08

Lu, Caixia (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S133000, C526S348000, C526S351000, C526S172000

Reexamination Certificate

active

07087690

ABSTRACT:
New ligands, compositions, metal-ligand complexes and arrays with pyridyl-amine ligands are disclosed that catalyze the polymerization of monomers into polymers. Certain of these catalysts with hafnium metal centers have high performance characteristics, including higher comonomer incorporation into ethylene/olefin copolymers, where such olefins are for example, 1-octene, isobutylene or styrene. Certain of the catalysts are particularly effective at polymerizing propylene to high molecular weight isotactic polypropylene in a solution process at a variety of polymerization conditions.

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