Process for the preparation of multimodal polyethylene resins

Details Process for the preparation of multimodal polyethylene resins Process for the preparation of multimodal polyethylene resins

2008-07-16

2010-11-09

Lee, Rip A. (Department: 1796)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S119000, C526S065000, C526S172000, C526S170000, C526S160000, C526S161000, C526S348000, C526S130000

Reexamination Certificate

active

07829641

ABSTRACT:
A two-stage cascade polymerization process for the production of multimodal polyethylene film resins with improved bubble stability is provided. The process comprises polymerizing ethylene or a mixture of ethylene and a C4-8α-olefin in two reactors arranged in series using a mixed single-site catalyst comprised of a bridged and a non-bridged indenoindolyl transition metal complex to form a multimodal polyethylene resin comprised of a lower molecular weight, higher density component and a higher molecular weight, lower density component.

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