Active oxygen scavenger packaging

US6406766B1 · kind B1 · utility

Assignee

• BP CORPORATION NORTH AMERICA INC. · US

Inventors

• George E. Rotter · Naperville, US
• Paul J. Cahill · Wheaton, US
• Tamila J. Barnes · Wheaton, US
• Charles W. Bauer · Batavia, US
• David C. Johnson · Portland, US
• Matthew A. Kulzick · Warrenville, US
• Tsuei-Yun Lynch · Wheaton, US
• Walter M. Nyderek · Tinley Park, US

Key dates

• Filing date: Dec 22, 1998
• Grant date: Jun 18, 2002
• Expiry date: Dec 22, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31725
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

Improved active oxygen scavenging packaging articles optionally further comprising SiO2 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.