US3723568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Segmented thermoplastic copolyesters modified with polyepoxides
Assignee: EIDP Inc
•
Filing: 1972-02-28
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Granted: 1973-03-27
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Expires: 1992-02-28
Abstract
Abstract A thermoplastic copolyester composition comprising: (a) at least one segmented copolyester polymer consisting essentially of (1) about 5-85 weight percent of recurring long-chain ester units derived from at least one dicarboxylic acid having a molecular weight below about 300 and at least one poly(alkylene oxide) glycol having a molecular weight between about 400-6,000 and a carbon to oxygen ratio of about 2.0-4.3 and (2) 15-95 weight percent short-chain ester units which are derived from at least one low molecular weight diol having a molecular weight of less than about 250 and at least one dicarboxylic acid having a molecular weight of less than about 300, and (b) from 0.5-10 equivalents, per equivalent of carboxyl group contained in said copolyester of a polyepoxide having a functionality of not less than about 2.
Inventors
- 👤 G Hoeschele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:20
CPC Classifications
C; C08; C08L; C08L63/00; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G63/00; C08G63/66; C08G63/668; C08G63/672; C08L67/00; C08L67/02; C08L67/025
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
20 words
The composition of claim 1 wherein a maximum of 100 milliequivalents of carboxyl groups are present per kilogram of polymer.
Claim 2
Dependent Claim
22 words
The composition of claim 1 wherein the polyepoxide has an epoxide equivalent of about 50-2,000 and is represented by the general formula:
Claim 3
Dependent Claim
16 words
The composition of claim 3 wherein R'''' contains carbocyclic aromatic nuclei substituted with Cl or Br.
Claim 4
Dependent Claim
26 words
The composition of claim 3 wherein R'''''' and R'''''''' are hydrogen, n is 2 to 10 and the polyepoxide has an epoxide equivalent of about 75-1,000.
Claim 5
Dependent Claim
12 words
The composition of claim 3 wherein said polyepoxide is a polyglycidyl compound.
Claim 6
Dependent Claim
15 words
The composition of claim 1 wherein said polyepoxide is a diglycidyl ether of bisphenol A.
Claim 7
Dependent Claim
23 words
The composition of claim 1 wherein said copolyester also contains 0.05-0.5 weight percent, based on the weight of copolyester, of an epoxy catalyst.
Claim 8
Dependent Claim
14 words
The composition of claim 8 wherein said epoxy catalyst is a secondary aliphatic amine.
Claim 9
Dependent Claim
25 words
The composition of claim 9 wherein said secondary amine has a boiling point at least about as high as the melting point of said copolyester.
Claim 10
Dependent Claim
27 words
The composition of claim 1 wherein said dicarboxylic acid is selected from the group consisting of phthalic acid, terephthalic acid, isophthalic acid, their esters and mixtures thereof.
Claim 11
Dependent Claim
21 words
The composition of claim 1 wherein the poly(alkylene oxide) glycol is poly(tetramethylene oxide) glycol having a molecular weight of about 600-2,000.
Claim 12
Dependent Claim
10 words
The composition of claim 1 wherein said diol is 1,4-butanediol.
Claim 13
Dependent Claim
16 words
The composition of claim 1 wherein said polyepoxide is a polyglycidyl ether of a phenol-formaldehyde novolac.
Claim 14
Dependent Claim
30 words
The composition of claim 9 wherein said glycol is poly(tetramethylene oxide) glycol having a molecular weight of about 600-2,000, said dicarboxylic acid is dimethyl terephthalate and said diol is 1,4-butanediol.
Claim 15
Dependent Claim
30 words
The composition of claim 9 wherein said dicarboxylic acid is a mixture of dimethyl terephthalate and a maximum of 30 mole percent of dimethyl isophthalate, dimethyl phthalate or mixtures thereof.
References Cited (Backward Citations)
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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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |