Gas-barrier multilayered structure

Details Gas-barrier multilayered structure Gas-barrier multilayered structure

B - Operations, Transporting

32

B

154/140

B32B 27/08 (2006.01) B32B 27/28 (2006.01) B32B 27/34 (2006.01) C08G 69/26 (2006.01) C08L 77/00 (2006.01)

Patent

CA 1279811

Abstract of the Disclosure A gas-barrier multilayered structure comprising (A) at least one layer of a copolyamide composed of (a) a dicarboxylic acid component composed of 55 to 70 mole % of an aliphatic dicarboxylic acid component and 45 to 30 mole % of an aromatic dicarboxylic acid component con- sisting substantially of 20 to 30 mole % of isophthalic acid and 5 to 20 mole % of terephthalic acid, and (b) a diamine component composed substantially of a m-xylylene- diamine component, and (B) at least one layer of a thermo- plastic resin other than the copolyamide. Instead of the layer (A), there can be used (A') at least one layer of a mixture of 40 to 60 % by weight of a first copolyamide composed of (a) a dicarboxylic acid component composed of 55 to 70 mole % of an aliphatic dicarboxylic acid com- ponent and 45 to 30 mole % of an aromatic dicarboxylic acid component consisting substantially of 20 to 30 mole % of isophthalic acid and 5 to 20 mole % of terephthalic acid and (b) a diamine component composed substantially of m-xylylenediamide and 60 to 40 % by weight of a second polyamide composed of a dicarboxylic acid component consisting substantially of an aliphatic dicarboxylic acid component and a diamine component consisting substantially of a m-xylylenediamine component.

565075

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