US4398017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolyesters
Assignee: Graham Packaging Plastic Products Inc
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Filing: 1982-03-09
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Granted: 1983-08-09
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Expires: 2002-03-09
Abstract
Abstract Copolyesters of iso- or terephthalic acid, ethylene glycol, 1,3 bis(2-hydroxyethoxy) benzene, and possibly other diols, have lower 0 2 and CO 2 permeabilities because of the 1,3 bis(2-hydroxyethoxy) benzene reactant. Also disclosed are hollow containers, sheet and film made from such copolyesters.
Inventors
- 👤 Santos W. Go
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:43
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
158 words
A solid thermoplastic copolyester consisting essentially of the polymeric reaction product of (A) reactant(s) selected from isophthalic acid, terephthalic acid and their C 1 to C 4 alkyl esters, and any mixture thereof in any proportion, (B) reactants, 1,3 bis(2-hydroxyethoxy)benzene plus ethylene glycol, and optionally one or more other ester forming dihydroxy organic hydrocarbon reactant(s), and optionally, (C) reactant, bis(4-β-hydroxyethoxyphenyl) sulfone, wherein (1) the amount of said 1,3 bis(2-hydroxyethoxy)benzene is 5-90 mol percent of the amount of A reactants, (2) the combined amount of B and C reactants is about 110 to 300 mol percent of the amount of A reactants, (3) the amount of said other ester forming dihydroxy organic hydrocarbon reactant(s) is zero to 20 mol percent of the amount of said A reactants, and (4) the combined amount of said (C) reactant plus said 1,3 bis(2-hydroxyethoxy)benzene and said other ester forming dihydroxy organic hydrocarbon reactant(s) is not over 90 mol percent of said A reactants.
Claim 2
Dependent Claim
158 words
A solid thermoplastic copolyester consisting essentially of the polymeric reaction product of (A) reactant(s) selected from isophthalic acid, terephthalic acid and their C 1 to C 4 alkyl esters, and any mixture thereof in any proportion, (B) reactants, 1,3 bis(2-hydroxyethoxy)benzene plus ethylene glycol, and optionally one or more other ester forming dihydroxy organic hydrocarbon reactant(s), and optionally, (C) reactant, bis(4-β-hydroxyethoxyphenyl) sulfone, wherein (1) the amount of said 1,3 bis(2-hydroxyethoxy)benzene is 5-90 mol percent of the amount of A reactants, (2) the combined amount of B and C reactants is about 110 to 300 mol percent of the amount of A reactants, (3) the amount of said other ester forming dihydroxy organic hydrocarbon reactant(s) is zero to 20 mol percent of the amount of said A reactants, and (4) the combined amount of said (C) reactant plus said 1,3 bis(2-hydroxyethoxy)benzene and said other ester forming dihydroxy organic hydrocarbon reactant(s) is not over 90 mol percent of said A reactants.
Claim 3
Dependent Claim
22 words
A copolyester of claim 1 wherein the amount of 1,3 bis(2-hydroxyethoxy)benzene is not more than 80 mol percent of the A reactants.
Claim 4
Dependent Claim
22 words
A copolyester of claim 2 wherein the amount of 1,3 bis(2-hydroxyethoxy)benzene is not less than 10 mol percent of the A reactants.
Claim 5
Dependent Claim
19 words
A copolyester of claim 1 wherein terephthalic acid or its C 1 to C 4 alkyl esters is selected.
Claim 6
Dependent Claim
8 words
Hollow containers having a composition of claim 1.
Claim 7
Dependent Claim
9 words
Sheet or film having a composition of claim 1.
Claim 8
Dependent Claim
27 words
The copolyester of claim 1 wherein the amount of said dihydroxy organic hydrocarbon reactant(s) is zero to 15 mol percent of the amount of said A reactants.
References Cited (Backward Citations)
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US4145517A
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US4188357A
Cited
US4196275A
Cited
US4330661A
Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-08 | 1987-02-07 | 1987-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-08 | 1991-02-07 | 1991-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-08 | 1995-02-07 | 1995-08-09 | $7700.00 | Window Closed / Lapsed |