Bp Corporation North America Inc.

Walter M Nyderek

Paul J Cahill

George E Rotter

Roman F Barski

David C Johnson

Stephen Chen

Charles W Bauer

Matthew A Kulzick

Joel Albert Richardson

Tsuei-Yun Lynch

Raymond V Wass

Donald F Ackerley

Granville L Smyser

Weilong Chiang Chiang

Tamila J Barnes

Improved active oxygen scavenging packaging articles optionally further comprising SiO and/or EAA coatings are disclosed. Also improved active oxygen scavenging copolycondensates and their use in packaging articles are disclosed. Specifically disclosed are (1) the use of an oxidation moderator or controller (anti-oxidant) along with the copolycondensate scavenger and (2) post polymerization treatment of the copolycondensate substantially in the absence of oxygen. The improvements lead to increased oxygen consumption by the active oxygen scavenger and improved packaging characteristics for the active oxygen scavenging copolycondensates.

Active oxygen scavenger packaging

Multilayered plastic bottles are disclosed having oxygen scavenging capacity sufficient to maintain substantially zero or near zero (depending on product requirements) presence of oxygen in the bottle cavity for the planned shelf life of the bottled product under specified storage conditions. The bottles feature a layer comprised of oxygen scavenger copolyester and may be used for bottling beer and other products requiring nearly total absence of oxygen for the duration of the target product shelf life.

Zero oxygen permeation plastic bottle for beer and other applications

Active oxygen scavenging compositions and their use in packaging articles are disclosed. The compositions are all plastic materials and are typically deployed as at least one layer in a multi-layered wall of a packaging article such as a bottle, can or film. The compositions are usually used in conjunction with added transition metal catalyst to enhance the uptake of oxygen. Use of the compositions and package constructions disclosed serves to lengthen the shelf life of packaged oxygen sensitive substances and/or diminish the need for refrigeration of the packages.

Active oxygen scavenger compositions and their use in packaging articles

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Tinley Park, IL, United States of America

Walter M Nyderek