IMPROVED ACTIVE OXYGEN SCAVENGER PACKAGING

• Main Authors: CAHILL, PAUL, J, BARNES, TAMILA, J, NYDEREK, WALTER, M, BAUER, CHARLES, W, LYNCH, TSUEI-YUN, ROTTER, GEORGE, E, JOHNSON, DAVID, C, KULZICK, MATTHEW, A
• Format: Patent
• Language: English; French
• Published: 29.06.2000
• Edition: 7
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; CHEMISTRY; COMPOSITIONS BASED THEREON; CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; CONVEYING; HANDLING THIN OR FILAMENTARY MATERIAL; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; STORING; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING

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. Cette invention se rapporte à des articles d'emballages avec désoxygénant actif, contenant éventuellement aussi des revêtements de SiO2 et/ou EAA, ainsi qu'à des copolycondensats de désoxygénation active et à leur utilisation dans des articles d'emballage. Cette invention se rapporte spécifiquement (1) à l'utilisation d'un modérateur ou réducteur d'oxydation (antioxydant) associé à un tel désoxygénant à base de copolycondensats; et (2) au traitement après polymérisation de ce copolycondensat essentiellement en l'absence d'oxygène. Ces améliorations entraînent une consommation accrue d'oxygène par le désoxygénant actif et des caractéristiques d'emballage améliorées pour ces copolycondensats de désoxygénation active.