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US5039780A
Expired / Lapsed
US
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Copolyester having gas-barrier property
Assignee: Mitsui Chemicals Inc
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Filing: 1989-11-07
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Granted: 1991-08-13
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Expires: 2009-11-07
Abstract
Abstract A copolyester having an intrinsic viscosity, measured in o-chlorophenol at 25° C., of 0.3 to 1.5 dl/g and being derived from dicarboxylic acid units composed of 95 to 60 mole % of isophthalic acid units and 5 to 40 mole % of 2,6-naphthalenedicarboxylic acid units and dihydroxy compound units composed of 95 to 70 mole % of ethylene glycol units and 5 to 30 mole % of 1,3-bis(2-hydroxyethoxy)benzene units; a gas barrier imparting agent composed of the copolyester; a polyester composition composed of (A) a polyethylene terephthlate and (B) the copolyester; and a film, a preform and a container composed of the polyester composition. Also provided are a polyester laminated structure, a stretched laminated structure, a preform and a laminated blow-molded article each composed of (C) a polyalkylene terephthalate layer and (D) a copolyester layer composed of the copolyester or the polyester composition.
Inventors
- 👤 Mikio Hashimoto
- 👤 Norio Kaneshige
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:15
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B29; B29C; B29C49/00; B29C49/0005; B29C49/0006; B29C49/22; B32B27/36; C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/20; C08G63/66; C08G63/668; C08J; C08J5/00; C08J5/18; C08L; C08L67/00; C08L67/02; B29C49/42; B29C49/78; B29C2049/7879; B29C2949/00; B29C2949/07; B29C2949/081; B29C2949/0811; B29C2949/0861; B29C2949/0862; B29C2949/20; B29C2949/22; B29C2949/24; B29C2949/26; B29C2949/28; B29C2949/30; B29C2949/3008; B29C2949/3012; B29C2949/3016; B29C2949/302; B29C2949/3024; B29C2949/3026; B29C2949/3028; B29C2949/303; B29C2949/3032; B29C2949/3034; B29C2949/3036; B29C2949/3038; B29C2949/3041; B29C2949/3042; B29C2949/3044; B29C2949/3046; B29C49/08; B29C49/087; B29K; B29K2067/00; B29K2667/00; B29K2995/00; B29K2995/0037; B29K2995/0065; B29K2995/0067; B29L; B29L2031/00; B29L2031/712; B29L2031/7158; B32B2307/00; B32B2307/50; B32B2307/514; B32B2307/70; B32B2307/718; B32B2367/00; B32B2439/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
69 words
A copolyester having an intrinsic viscosity, measured in o-chlorophenol at 25° C., of 0.3 to 1.5 dl/g and being derived from dicarboxylic acid units composed of 95 to 60 mole % of isophthalic acid units and 5 to 40 mole % of 2,6-naphthalenedicarboxylic acid units and dihydroxy compound units composed of 95 to 70 mole % of ethylene glycol units and 5 to 30 mole % of 1,3-bis(2hydroxyethoxy)benzene units.
Claim 2
Dependent Claim
69 words
A copolyester having an intrinsic viscosity, measured in o-chlorophenol at 25° C., of 0.3 to 1.5 dl/g and being derived from dicarboxylic acid units composed of 95 to 60 mole % of isophthalic acid units and 5 to 40 mole % of 2,6-naphthalenedicarboxylic acid units and dihydroxy compound units composed of 95 to 70 mole % of ethylene glycol units and 5 to 30 mole % of 1,3-bis(2hydroxyethoxy)benzene units.
Claim 3
Dependent Claim
73 words
A copolyester according to claim 1 having an intrinsic viscosity, measured in o-chlorophenol at 25° C., of 0.6 to 1.0 dl/g and being derived from dicarboxylic acid units composed of 90 to 70 mole % of isophthalic acid units and 10 to 30 mole % of 2,6-naphthalenedicarboxylic acid units and dihydroxy compound units composed of 90 to 80 mole % of ethylene glycol units and 10 to 20 mole % of 1,3-bis(2-hydroxyethoxy)benzene units.
Claim 4
Dependent Claim
27 words
The copolyester of claim 2 which further comprises 0.01 to 2 mole, per 100 mole of the dihydroxy compound units, of trifunctional or higher-functional polyhydroxy compound units.
Claim 5
Dependent Claim
23 words
The copolyester of claim 2 which further comprises 0.05 to 1 mole, per 100 moles of the dihydroxy compound units, of 1,1,1-tris(hydroxymethyl)propane units.
Claim 6
Dependent Claim
75 words
A gas-barrier property imparting agent comprising a copolyester having an intrinsic viscosity, measured in o-chlorophenol at 25° C., of 0.3 to 1.5 dl/g and being derived from dicarboxylic acid units composed of 95 to 60 mole % of isophthalic acid units and 5 to 40 mole % of 2,6-naphthalenedicarboxylic acid units and dihydroxy compound units composed of 95 to 70 mole % of ethylene glycol units and 5 to 30 mole % of 1,3-bis(2hydroxyethoxy)benzene units.
Claim 7
Dependent Claim
75 words
A gas-barrier property imparting agent comprising a copolyester having an intrinsic viscosity, measured in o-chlorophenol at 25° C., of 0.3 to 1.5 dl/g and being derived from dicarboxylic acid units composed of 95 to 60 mole % of isophthalic acid units and 5 to 40 mole % of 2,6-naphthalenedicarboxylic acid units and dihydroxy compound units composed of 95 to 70 mole % of ethylene glycol units and 5 to 30 mole % of 1,3-bis(2hydroxyethoxy)benzene units.
Claim 8
Dependent Claim
79 words
A gas-barrier property imparting agent according to claim 5 comprising a copolyester having an intrinsic viscosity, measured in o-chlorophenol at 25° C., of 0.6 to 1.0 dl/g and being derived from dicarboxylic acid units composed of 90 to 70 mole % of isophthalic acid units and 10 to 30 mole % of 2,6-naphthalenedicarboxylic acid units and dihydroxy compound units composed of 90 to 80 mole % of ethylene glycol units and 10 to 20 mole % of 1,3-bis(2-hydroxyethoxy)benzene units.
Claim 9
Dependent Claim
33 words
The gas-barrier property imparting agent of claim 6 in which the copolyester further comprises 0.01 to 2 moles, per 100 moles of the dihydroxy compound units, of trifunctional or higher-functional polyhydroxy compound units.
Claim 10
Dependent Claim
29 words
The gas-barrier property imparting agent of claim 6 in which the copolyester further comprises 0.05 to 1 mole, per 100 moles of the dihydroxy compound units, of 1,1,1-tris(hydroxymethyl)propane units.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-12 | 1995-02-11 | 1995-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-12 | 1999-02-11 | 1999-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-12 | 2003-02-11 | 2003-08-13 | $7700.00 | Window Closed / Lapsed |