High density polyethylene packaging

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

Reexamination Certificate

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C526S161000, C526S171000, C526S172000

Reexamination Certificate

active

06903176

ABSTRACT:
High density polyethylene made using a cobalt or iron complex of a selected tridentate ligand as a polymerization catalyst may be made into packaging which has advantageous properties, especially lower permeation to ambient materials such as oxygen and/or water. The packaging, such as bottles, bags and rigid storage tanks, may be formed by conventional methods.

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Brooke L. Small, et al., New Iron and Cobalt Catalysts for the Polymerization of Olefins,Am. Chem. Soc.,39, 213, 1998.
Britovsek, et al., Novel Olefin Polymerization Catalysts Based on Iron and Cobalt,J. Chem. Soc. Chem. Commun., 849-850, 1998.

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