Polyolefin

Details Polyolefin Polyolefin

1998-12-18

2001-07-24

Wu, David W. (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S348000, C526S348600, C526S348500

Reexamination Certificate

active

06265513

ABSTRACT:

FIELD OF THE INVENTION
This invention relates to a polymer produced using an olefin polymerization catalysts based upon two transition metal compounds comprising bidentate ligands containing pyridine or quinoline moieties and mixtures thereof.
BACKGROUND OF THE INVENTION
The intense commercialization of metallocene polyolefin catalysts has led to widespread interest in the design of non-metallocene, homogeneous catalysts. This field is more than an academic curiosity as new, non-metallocene catalysts may provide an easier pathway to currently available products and may also provide product and process opportunities which are beyond the capability of metallocene catalysts. In addition, certain non-cyclopentadienyl ligands may be more economical due to the relative ease of synthesis of a variety of substituted analogs.
Thus there is a need in the art for new novel olefin polymerization catalysts and for the unique polymers they produce.
WO 96/23101, WO 97/02298, WO 96/33202 and Furhmann et al,
Inorg. Chem.
35:6742-6745 (1996) all disclose nitrogen containing single site like catalyst systems.
SUMMARY OF THE INVENTION
This invention relates to a polymer produced by an olefin polymerization catalyst system comprising an activator and two or more transition metal catalysts based on bidentate ligands containing pyridine or quinoline moieties, such as those described in U.S. application Ser. No. 09/103,620 filed Jun. 23, 1998, which is herein incorporated by reference. This invention further relates to unique polyethylene resins, more preferably bimodal high density polyethylene resins produced by this invention.


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