Process for producing polyolefins and polyolefin catalyst

Details Process for producing polyolefins and polyolefin catalyst Process for producing polyolefins and polyolefin catalyst

1994-04-07

1998-02-17

Wu, David W.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526118, 526160, 526127, 5263485, 526905, 526943, 502113, 502152, C08F 464

Patent

active

057192413

ABSTRACT:
The present invention provides a process for preparing polyolefins having a multimodal or at least bimodal molecular weight distribution by contacting in a reaction mixture under polymerization conditions at least one olefin and a catalyst system comprising a supported catalyst-component comprising an alumoxane and at least two metallocenes containing the same transition metal and selected from mono, di, and tri-cyclopentadienyls and substituted cyclopentadienyls of a transition metal and wherein at least one of the metallocenes is bridged and at least one of the metallocenes is unbridged.

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patent: 4897455 (1990-01-01), Welborn, Jr.
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patent: 4952540 (1990-08-01), Kioka et al.
patent: 5064797 (1991-11-01), Stricklen
patent: 5087788 (1992-02-01), Wu
patent: 5126303 (1992-06-01), Resconi et al.
patent: 5374700 (1994-12-01), Tsutsui et al.

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