Olefin polymerization with pyridine moiety-containing...

Details Olefin polymerization with pyridine moiety-containing... Olefin polymerization with pyridine moiety-containing...

2006-08-15

2006-08-15

Choi, Ling-Sui (Department: 1713)

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C526S161000, C526S127000, C526S132000, C526S172000, C526S126000, C526S352000

Reexamination Certificate

active

07091272

ABSTRACT:
An olefin polymerization process is disclosed. The polymerization is performed in the presence of a clay, an activator, and a transition metal complex that has at least one pyridine moiety-containing ligand. The presence of clay increases the catalyst activity. The process is suitable for making ultra-high molecular weight polyethylenes (UHMWPE). The UHMWPE produced has increased bulk density.

REFERENCES:
patent: 5637660 (1997-06-01), Nagy et al.
patent: 6211311 (2001-04-01), Wang et al.
patent: 6265504 (2001-07-01), Liu et al.
patent: 2002/0035228 (2002-03-01), Martin et al.
patent: 2001-253909 (2001-09-01), None

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