Transition metal complexes, and catalysts compositions for...

Details Transition metal complexes, and catalysts compositions for... Transition metal complexes, and catalysts compositions for...

2009-01-06

2010-12-07

Lee, Rip A. (Department: 1796)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S172000, C526S160000, C526S170000, C526S134000, C526S348000, C526S073000, C502S103000, C556S051000, C556S052000

Reexamination Certificate

active

07847039

ABSTRACT:
Disclosed are a transition metal complex having a high catalytic activity for the preparation of an ethylene homopolymer or a copolymer of ethylene and α-olefin and a catalyst composition comprising the same. More specifically, there are provided a transition metal complex having, around a group IV transition metal, a cyclopentadiene derivative and at least one aryl oxide ligand with a heterocyclic aryl derivative substituted at the ortho-position thereof, with no crosslinkage between the ligands, a catalyst composition comprising the transition metal complex and an organoaluminum compound or boron compound as cocatalyst, and a method for the preparation of high molecular weight ethylene homopolymers or copolymers of ethylene and α-olefin using the same.

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