Gas-barrier multilayered structure

Details Gas-barrier multilayered structure Gas-barrier multilayered structure

1988-04-25

1990-03-13

Lesmes, George F.

Stock material or miscellaneous articles

Composite

Of polycarbonate

4284769, 4284752, 4284749, 4284747, 4284761, 528339, B32B 2734, B32B 2708, B32B 2728

Patent

active

049082728

ABSTRACT:
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 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 a m-xylylenediamine component, and (B) at least one layer of a thermoplastic 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 component 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-xylylenediamine and 60 to 40 % by weight of a second polyamide composed of a dicarboxylic acid component consisting substantially of an aliphthalic dicarboxylic acid component and a diamine component consisting substantially of a m-xylylenediamine component.

REFERENCES:
patent: 3843479 (1974-10-01), Matsunami et al.

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