Mixed titanium-vanadium catalysts for solution ethylene polymeri

Details Mixed titanium-vanadium catalysts for solution ethylene polymeri Mixed titanium-vanadium catalysts for solution ethylene polymeri

1998-06-29

2000-07-04

Kopec, Mark

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

5261247, 5261248, 526142, 526144, 526 64, 526 65, 5261249, 5261252, 5261257, 526 73, 526 88, 526170, 502113, 502115, 502110, C08F 4654, C08F 468

Patent

active

060840420

ABSTRACT:
The present invention provides a Ziegler-Natta catalyst based on titanium and vanadium useful in solution processes for the polymerization of olefins having a low amount of aluminum and magnesium. The catalysts of the present invention have a molar ratio of magnesium to the first aluminum component from 4.0:1 to 8.0:1 and molar ratio of magnesium to titanium and vanadium from 4.0:1 to 8.0:1. The invention provides a novel catalyst preparation method to substantially increase the polymer molecular weight in the high temperature ethylene polymerization process.

REFERENCES:
patent: 4097659 (1978-06-01), Creemers et al.
patent: 4314912 (1982-02-01), Lowery, Jr. et al.
patent: 5519098 (1996-05-01), Brown et al.
patent: 5589555 (1996-12-01), Zboril et al.

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