US3886123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyesteramides based on bis-aminoalkyl hydantoins or dihydrouracils
Assignee: Novartis Corp
•
Filing: 1974-03-13
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Granted: 1975-05-27
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Expires: 1994-03-13
Abstract
Abstract Linear copolyesters containing amide groups are obtained by polycondensing certain dicarboxylic acid diamides which are obtained by reacting 1 mol of a N-heterocyclic-aliphatic diamine with 2 mols of terephthalic acid, isophthalic acid or amideforming derivatives thereof, to a relative viscosity higher than 1.2, with terephthalic acid, isophthalic acid or polyesterforming derivatives and with alkanediols. The new copolyesters containing amide groups are valuable engineering thermoplastic materials which can be easily processed and which yield moulded materials with good thermomechanical properties.
Inventors
- 👤 Jurgen Habermeier
- 👤 Walter Kunz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:45
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/20; C07D239/22; C07D233/00; C07D233/54; C07D233/66; C07D233/72; C08; C08G; C08G63/00; C08G63/68; C08G63/685; C08G63/6854; C08G63/6856; C08G69/00; C08G69/44
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
52 words
A LINEAR, THERMOPLASTIC COPOLYESTER WHICH CONTAINS AMIDE GROUPS AND IS BASED ON TEREPHTHALIC ACID AND/OR ISOPHTHALIC ACID AND ALKANEDIOLS CONTAINING 2-10 CARBON ATOMS, CHARACTERISED IN THAT IT CONTAINS, THE CO-COMPONENT, 5-90 MOL %, RELATIVE TO THE TOTAL MOLAR QUANTITY OF DICARBOXYLIC ACID COMPONENTS, OF A DICARBOXYLIC ACID DIAMIDE RADICAL OF THE FORMULA
Claim 2
Dependent Claim
52 words
A LINEAR, THERMOPLASTIC COPOLYESTER WHICH CONTAINS AMIDE GROUPS AND IS BASED ON TEREPHTHALIC ACID AND/OR ISOPHTHALIC ACID AND ALKANEDIOLS CONTAINING 2-10 CARBON ATOMS, CHARACTERISED IN THAT IT CONTAINS, THE CO-COMPONENT, 5-90 MOL %, RELATIVE TO THE TOTAL MOLAR QUANTITY OF DICARBOXYLIC ACID COMPONENTS, OF A DICARBOXYLIC ACID DIAMIDE RADICAL OF THE FORMULA
Claim 3
Dependent Claim
50 words
A copolyester according to claim 1 based on terephthalic acid and/or isophthalic acid and alkanediols containing 2-6 carbon atoms, characterised in that it contains, as the co-component, 5-75 mol % of a dicarboxylic acid diamide radical of the formula I wherein X denotes a N,N-heterocyclic radical of the formula III
Claim 4
Dependent Claim
18 words
A copolyester according to claim 1, characterised in that X in the formula denotes 5,5-pentamethylenehydantoin, 5,5-dimethylhydantoin or 5,5-dimethyl-5,6-dihydrouracil.
Claim 5
Dependent Claim
20 words
A copolyester according to claim 1, characterised in that X in the formula I denotes a radical of the formula
Claim 6
Dependent Claim
29 words
A copolyester according to claim 4, characterised in that A in the formula denotes an alkylene up to 12 carbon atoms which may be interrupted by ether oxygen atoms.
Claim 7
Dependent Claim
13 words
A copolyester according to claim 1, characterised in that X denotes bis-(5,5-dimethylhydantoinyl-3)-diethyl ether.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |