Compartmentalized resin pellets for oxygen scavenging

Details Compartmentalized resin pellets for oxygen scavenging Compartmentalized resin pellets for oxygen scavenging

B - Operations, Transporting

29

B

B29B 9/12 (2006.01) B29B 13/02 (2006.01) C08J 3/12 (2006.01) C08K 5/00 (2006.01)

Patent

CA 2606539

Disclosed is a process and article to simultaneously thermally treat at least two thermoplastics when one of the thermoplastics is an oxygen inert material and the other is an oxygen sensitive material, and the article also contains a promoter that converts the oxygen sensitive material to an oxygen reactive material when brought in contact with the oxygen sensitive material. The process utilizes the compartmentalized pellet, also known as a zoned pellet, construction wherein the major amount of each component is located within individual compartments or zones of the pellet such that the reactions with compounds in the atmosphere such as oxygen are less than the reaction if the thermoplastics were homogeneously dispersed in the pellet. This is of particular use to oxygen scavenging systems .

L'invention concerne un procédé et un article de traitement thermique simultané d'au moins deux thermoplastiques, l'un des thermoplastiques étant un matériau d'oxygène inerte et l'autre un matériau sensible à l'oxygène. L'article contient également un agent promoteur convertissant le matériau sensible à l'oxygène en un matériau réagissant à l'oxygène lorsque celui-ci vient en contact avec le matériau sensible à l'oxygène. Le procédé consiste à utiliser la pastille compartimentée, également connue sous le nom de pastille à zones, construction dans laquelle la plus grande quantité de chaque composant est située dans des compartiments individuels ou zones de la pastille de manière à réduire les réactions avec les composés de l'atmosphère, par exemple l'oxygène, par rapport à la réaction obtenue lorsque les thermoplastiques sont dispersés de manière homogène dans la pastille. L'invention est utilisée, en particulier, dans les systèmes de piégeage de l'oxygène.

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