Alumoxane-enhanced, supported ziegler-natta polymerization catal

Details Alumoxane-enhanced, supported ziegler-natta polymerization catal Alumoxane-enhanced, supported ziegler-natta polymerization catal

1997-12-29

2000-09-26

Wood, Elizabeth D.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

5261242, 5261243, 5261249, 526129, 526165, 502103, 502104, 502113, 502114, 502115, 502116, 502117, 502118, 502125, 502126, B01J 3100, B01J 444

Patent

active

061244120

ABSTRACT:
The present invention relates to a new olefin polymerization catalyst composition, and methods of preparing and methods of using the catalysts to polymerize various olefinic monomers in either gas or slurry phase reactions. The principal advance over the previous art of record involves using alumoxanes or combinations of alumoxanes as catalyst preactivators. Polymers prepared from these catalysts posses productivity increased as high as 40 percent. At the same time, the bulk density remains relatively constant. Additionally, the total amount of cocatalyst species needed to effectively practice the invention is relatively low.

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