EP0318964A2
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EP
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Transparent gas-barrier multilayer structure
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1988-11-30
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Granted: —
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Expires: 2008-11-30
Abstract
Abstract A transparent gas-barrier multilayer structure comprising (A) at least one layer of a polyamide composition comprising (a) 30 to 80 parts by weight of a first copolyamide composed of an aromatic dicarboxylic acid as a main acid component and an aliphatic diamine as a main diamine component and (b) 70 to 20 parts by weight of a second copolyamide composed of an aliphatic dicarboxylic acid as a main acid component and m-xylylenediamine as a main diamine component, the total amount of the first copolyamide and the second copolyamide being 100 parts by weight, and (B) at least one layer of a thermoplastic resin other than the polyamide composition, said at least one layer (A) being bonded to said at least one layer (B).
Inventors
- 👤 Masahiro Harada
- 👤 Toru Kino
- 👤 Akira Iwamoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 03:55
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/34; B32B27/06; B32B27/08; B32B7/00; B32B7/04; B32B7/12; C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/265; B32B2307/00; B32B2307/40; B32B2307/412; B32B2307/70; B32B2307/724; B32B2307/7242; B32B2377/00; B32B2439/00; B32B2439/70; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31725; Y10T428/31728; Y10T428/31736; Y10T428/3175; Y10T428/31786; Y10T428/31855; Y10T428/31935; Y10T428/31938
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
123 words
A transparent gas-barrier multilayer structure comprising (A) at least one layer of a polyamide composition comprising (a) 30 to 80 parts by weight of a first copolyamide composed of an aromatic dicarboxylic acid as a main acid component and an aliphatic diamine as a main diamine component and (b) 70 to 20 parts by weight of a second copolyamide composed of an aliphatic dicarboxylic acid as a main acid component and m-xylylenediamine as a main diamine component, the total amount of the first copolyamide and the second copolyamide being 100 parts by weight, and (B) at least one layer of a thermoplastic resin other than the polyamide composition, said at least one layer (A) being bonded to said at least one layer (B).
Claim 2
Dependent Claim
123 words
A transparent gas-barrier multilayer structure comprising (A) at least one layer of a polyamide composition comprising (a) 30 to 80 parts by weight of a first copolyamide composed of an aromatic dicarboxylic acid as a main acid component and an aliphatic diamine as a main diamine component and (b) 70 to 20 parts by weight of a second copolyamide composed of an aliphatic dicarboxylic acid as a main acid component and m-xylylenediamine as a main diamine component, the total amount of the first copolyamide and the second copolyamide being 100 parts by weight, and (B) at least one layer of a thermoplastic resin other than the polyamide composition, said at least one layer (A) being bonded to said at least one layer (B).
Claim 3
Dependent Claim
40 words
The multilayer structure of claim 1 in which the acid component of the first copolyamide (a) is composed of 100 to 70 mole % of the aromatic dicarboxylic acid and 0 to 30 mole % of an aliphatic dicarboxylic acid.
Claim 4
Dependent Claim
19 words
The multilayer structure of claim 2 in which the aromatic dicarboxylic acid is isophthalic acid, terephthalic acid, or both.
Claim 5
Dependent Claim
24 words
The multilayer structure of claim 2 in which the aliphatic dicarboxylic acid is a linear aliphatic dicarboxylic acid having 4 to 12 carbon atoms.
Claim 6
Dependent Claim
45 words
The multilayer structure of claim 1 in which the diamine component of the first copolyamide (a) is composed of 100 to 95 mole % of an aliphatic diamine having two aminomethyl groups in the molecule and 0 to 5 mole % of an alicyclic diamine.
Claim 7
Dependent Claim
25 words
The multilayer structure of claim 5 in which the aliphatic diamine having two aminomethyl groups in the molecule is selected from hexamethylenediamine, tetramethylenediamine and 1,3-bisaminomethylcyclohexane.
Claim 8
Dependent Claim
15 words
The multilayer structure of claim 5 in which the alicyclic diamine is 1,3-bisaminomethylcyclohexane or bis(4-aminocyclohexylmethane).
Claim 9
Dependent Claim
28 words
The multilayer structure of claim 1 in which the acid component of the second copolyamide (b) is a linear aliphatic dicarboxylic acid having 4 to 12 carbon atoms.
Claim 10
Dependent Claim
47 words
The multilayer structure of claim 1 ln which the acid component of the second copolyamide (b) is composed of at least 90 mole % of a linear aliphatic dicarboxylic acid having 4 to 12 carbon atoms and up to 10 mole % of an aromatic dicarboxylic acid.
Claim 11
Dependent Claim
49 words
The multilayer structure of claim 1 in which the diamine component of the second copolyamide (b) is composed of m-xylylenediamine and 0 to 5 mole % of a subsidiary diamine component selected from aliphatic diamines having 4 to 12 carbon atoms, diamines having an alicyclic group, and aromatic diamines.
Claim 12
Dependent Claim
33 words
The multilayer structure of claim 1 in which the polyamide composition comprises 35 to 60 parts by weight of the first copolyamide and 65 to 40 parts by weight of the second copolyamide.
Claim 13
Dependent Claim
22 words
The multilayer structure of claim 1 in which the other thermoplastic resin (B) is selected from polyolefins, polystyrene, polyesters, polycarbonates and polyamides.
References Cited (Backward Citations)
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