Thermoplastic polymer composition having barrier properties

Details Thermoplastic polymer composition having barrier properties Thermoplastic polymer composition having barrier properties

C - Chemistry, Metallurgy

08

L

C08L 53/02 (2006.01) C08K 5/205 (2006.01) C08L 23/08 (2006.01) C08L 29/04 (2006.01)

Patent

CA 2418532

The present invention provides a thermoplastic polymer composition which is obtained through dynamic vulcanization performed by mixing an ethylene-vinyl alcohol copolymer (I), a modified block copolymer (II) which comprises an aromatic vinyl polymer block and a conjugated diene polymer black and which has a functional group consisting of a carboxyl group and/or its derivative, and an amine crosslinking agent (III), wherein the ethylene-vinyl alcohol copolymer (I) has an ethylene content of from 10 to 60 mole% and has a melt flow rate of from 1 to 20 g/10 minutes , and the amount of the functional group consisting of a carboxyl group and/or its derivative which the modified block copolymer (II) has is from 2 to 20 groups per molecule. The thermoplastic polymer composition is excellent in both barrier properties to gases, organic liquids and the like and flexibility.

La présente invention concerne un composé de polymère thermoplastique qui est obtenu par vulcanisation dynamique réalisée en mélangeant un copolymère éthylène-alcool vinylique (I), un copolymère bloc modifié (II) qui comprend un polymère bloc vinylique aromatique et un polymère bloc de diène conjugué et qui a un groupe fonctionnel composé d'un groupe carboxyle et/ou ses dérivés, et un agent de réticulation aminé (III), dans lequel le copolymère éthylène-alcool vinylique (I) a une teneur en éthylène de 10 à 60 % en moles et un indice de fluidité de 1 à 20 g/10 minutes, et la quantité du groupe fonctionnel composé d'un groupe carboxyle et/ou ses dérivés dont le bloc modifié copolymère (II) a de 2 à 20 groupes par molécule. La composition polymère thermoplastique a, à la fois, d'excellentes propriétés de barrière aux gaz, aux liquides organiques et aux solutions similaires et de flexibilité.

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