Polyethylene thick film and process for preparing polyethylene

Details Polyethylene thick film and process for preparing polyethylene Polyethylene thick film and process for preparing polyethylene

2008-09-03

2010-10-19

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...

C526S348000, C526S113000, C526S114000, C526S116000, C526S118000, C526S119000, C526S172000, C526S161000, C526S065000

Reexamination Certificate

active

07816478

ABSTRACT:
A thick film and process to prepare polyethylene useful for the film are disclosed. Ethylene is polymerized in two reaction zones with a C6-C10α-olefin in the presence of a catalyst system comprising an activator, a supported bridged zirconium complex, and a supported non-bridged zirconium complex. The process yields medium density to linear low density polyethylene having a melt index from 0.20 to 1.0 dg/min. Thick films from the polyethylene have a superior combination of high impact strength and high modulus.

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Stadler, et al., “Influence of Type and Content of Various Comonomers On Long-Chain Branching of Ethene/α-Olefin Copoymers”,Macromolecules2006, 39, 1474-1482.

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