Oxygen scavenger block copolymers and compositions

C - Chemistry – Metallurgy – 08 – J

Patent

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Details

C08J 5/18 (2006.01) B01J 20/26 (2006.01)

Patent

CA 2536289

An oxygen scavenger composition includes a block co-polymer having at least one block including a polyester condensation polymer segment having cycloalkenyl group(s) or functionality directly or indirectly bonded to the polymer chain of said block, and having at least one second block including a polymer segment of a thermoplastic, film forming material. The block copolymer has been found to act as an oxygen scavenger agent under both ambient and refrigerated conditions, to be compatible with conventional film forming packaging materials, and to provide compositions exhibiting low tack which can be readily formed and processed using conventional film forming equipment. A packaging material, such as a film or laminated product suitable for packaging applications, can include the oxygen scavenger composition.

Cette invention concerne une composition de désoxygénation renfermant un copolymère séquencé comprenant au moins une séquence comprenant un segment polymère de condensation polyester comprenant un ou plusieurs groupes ou une fonctionnalité cycloalcényle liés directement ou indirectement à la chaîne polymère de ladite séquence et comprenant au moins une seconde séquence comprenant un segment polymère d'un matériau filmogène thermoplastique. Ce copolymère séquencé agit comme un agent désoxygénant tant à température ambiante que dans un milieu réfrigéré, il est compatible avec les matériaux d'emballage filmogènes conventionnels et permet d'obtenir des compositions de faible adhérence pouvant être rapidement formées et traitées à l'aide d'un équipement filmogène conventionnel. Le matériau d'emballage, tel qu'un film ou un produit laminé pouvant être utilisé pour des applications d'emballage, peut comprendre cette composition de désoxygénation.

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