Patent US4384106A successfully refreshed from Google Patents.
US4384106A
Expired / Lapsed
US
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Copolyesters
Assignee: Graham Packaging Plastic Products Inc
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Filing: 1982-03-09
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Granted: 1983-05-17
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Expires: 2002-03-09
Abstract
Abstract Disclosed are copolyesters based on terephthalic or isophthalic acids, or both and at least one of 1,3 bis(2-hydroxyethoxy)benzene and bis(4-β-hydroxyethoxyphenyl) sulfone, which also contain 1,4 bis(2-hydroxyethoxy)benzene as one of the diol reactants in order to prepare solid copolyesters having improved folding endurance or fatigue resistance than the same copolyesters without such coreactant.
Inventors
- 👤 Santos W. Go
- 👤 Dennis J. Burzynski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:56
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/688; C08G63/6884; C08G63/6886; C08G63/66; C08G63/668; C08G63/672
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
146 words
A solid thermoplastic copolyester consisting essentially of the 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, ethylene glycol plus 1,4 bis(2-hydroxyethoxy)benzene and one or both of 1,3 bis(2-hydroxyethoxy)benzene, bis(4-β-hydroxyethoxyphenyl)sulfone and, optionally, other dihydroxylated hydrocarbons or oxyhydrocarbons, wherein the B reactants are 110 to 300 mol percent of said A reactants, all B reactants combined, exclusive of ethylene glycol, do not exceed 90 mol percent of said A reactants, bis(4-β-hydroxyethoxyphenyl)sulfone is 0 to 80 mol percent of said A reactants, said other dihydroxylated oxyhydrocarbons or hydrocarbons are 0-20 mol percent of said A reactants, the mols of 1,3 bis(2-hydroxyethoxy)benzene plus twice the mols of bis(4-β-hydroxyethoxyphenyl)sulfone are at least 10 mol percent of said A reactants, and 1,4 bis(2-hydroxyethoxy)benzene is 7-70 mol percent of said A reactants.
Claim 2
Dependent Claim
146 words
A solid thermoplastic copolyester consisting essentially of the 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, ethylene glycol plus 1,4 bis(2-hydroxyethoxy)benzene and one or both of 1,3 bis(2-hydroxyethoxy)benzene, bis(4-β-hydroxyethoxyphenyl)sulfone and, optionally, other dihydroxylated hydrocarbons or oxyhydrocarbons, wherein the B reactants are 110 to 300 mol percent of said A reactants, all B reactants combined, exclusive of ethylene glycol, do not exceed 90 mol percent of said A reactants, bis(4-β-hydroxyethoxyphenyl)sulfone is 0 to 80 mol percent of said A reactants, said other dihydroxylated oxyhydrocarbons or hydrocarbons are 0-20 mol percent of said A reactants, the mols of 1,3 bis(2-hydroxyethoxy)benzene plus twice the mols of bis(4-β-hydroxyethoxyphenyl)sulfone are at least 10 mol percent of said A reactants, and 1,4 bis(2-hydroxyethoxy)benzene is 7-70 mol percent of said A reactants.
Claim 3
Dependent Claim
22 words
A solid copolyester of claim 1 wherein the amount of 1,4 bis(2-hydroxyethoxy)benzene is at least 10 mol percent of said A reactants.
Claim 4
Dependent Claim
8 words
Hollow containers having a composition of claim 1.
Claim 5
Dependent Claim
9 words
Sheet or film having a composition of claim 1.
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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) | 1986-05-16 | 1986-11-15 | 1987-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-16 | 1990-11-15 | 1991-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-16 | 1994-11-15 | 1995-05-17 | $7700.00 | Window Closed / Lapsed |