Method of triggering oxygen scavenging composition with...

C - Chemistry – Metallurgy – 08 – J

Patent

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C08J 3/28 (2006.01) A23L 3/26 (2006.01) A23L 3/28 (2006.01) A23L 3/3436 (2006.01) B65D 81/24 (2006.01) C08K 5/00 (2006.01) C08K 5/098 (2006.01)

Patent

CA 2262528

A method for triggering an oxygen scavenging composition for use in packaging an oxygen sensitive article includes the steps of providing an oxygen scavenging composition comprising an oxidizable organic compound and, optionally, a transition metal catalyst, and exposing the composition to a source of pulsed light wherein each pulse has a duration of between 1 microsecond and 1 millisecond, a frequency of between 0.1 to 100 Hertz, and a total intensity of at least 350 mW/cm2 so that each pulse provides the composition with a dose of light of at least 0.1 J/cm2 so as to provide a triggered composition. The triggered composition can be applied to an article so as to provide an oxygen scavenging package. An apparatus and packaging system are also disclosed.

L'invention concerne un procédé d'activation d'une composition désoxygénante à utiliser dans l'emballage d'un article sensible à l'oxygène, qui consiste à produire une composition désoxygénante contenant un composé organique oxydable et, éventuellement, un catalyseur à métal de transition, et à exposer ladite composition à une source de lumière pulsée, chaque impulsion ayant une durée comprise entre 1 microseconde et 1 milliseconde, une fréquence comprise entre 0,1 et 100 hertz, et une intensité totale d'au moins 350 mW/cm<2> de sorte que chaque impulsion envoie à la composition une dose de lumière d'au moins 0,1 J/cm<2> et qu'une composition activée soit produite. Ladite composition activée peut être appliquée à un article pour la production d'un emballage désoxygénant. Un appareil et un système d'emballage sont également décrits.

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