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US4384061A
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Thermosetting polycondensates containing amide and imide groups, and their use
Assignee: BASF SE
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Filing: 1981-09-21
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Granted: 1983-05-17
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Expires: 2001-09-21
Abstract
Abstract Thermosetting polycondensates containing amide and imide groups which are obtained by reacting 1,2,3,4-butanetetracarboxylic acid or its anhydride with one or more aliphatic, cycloaliphatic or aromatic diamines and one or more oxadicarboxylic acids or oxadicarboxylic acid esters of the general formula ROOC--CH.sub.2 --O--(CH.sub.2).sub.2 --O--.sub.n CH.sub.2 --COOR where R is hydrogen or alkyl of 1 to 6 carbon atoms and n is 0 or an integer from 1 to 10, in a water-soluble organic solvent and/or water, at from 80° to 200° C. These polycondensates are useful as wire enamels, impregnating agents and adhesives.
Inventors
- 👤 Udo Reiter
- 👤 Helmut Lehmann
- 👤 Walter Disteldorf
- 👤 Hans-Uwe Schenck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:28
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1046; C08G73/1053; Y; Y10; Y10S; Y10S525/00; Y10S525/926; Y10S525/928; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T428/294
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
101 words
A thermosetting polycondensate, containing amide groups and imide groups, which is obtained by reacting (a) 1,2,3,4-butanetetracarboxylic acid or its anhydride with (b) one or more aliphatic, cycloaliphatic or aromatic diamines and (c) one or more oxadicarboxylic acids or oxadicarboxylic acid esters of the general formula ROOC--CH.sub.2 --O--(CH.sub.2).sub.2 --O--.sub.n CH.sub.2 --COOR where R is hydrogen or an alkyl of 1 to 6 carbon atoms and n is 0 or an integer from 1 to 10, in a water-soluble organic solvent or water at from 80° to 200° C., the components (a), (b) and (c) being employed in a molar ratio of (b):(a):(c)=1:(0.6-1):(0.1-0.6).
Claim 2
Dependent Claim
101 words
A thermosetting polycondensate, containing amide groups and imide groups, which is obtained by reacting (a) 1,2,3,4-butanetetracarboxylic acid or its anhydride with (b) one or more aliphatic, cycloaliphatic or aromatic diamines and (c) one or more oxadicarboxylic acids or oxadicarboxylic acid esters of the general formula ROOC--CH.sub.2 --O--(CH.sub.2).sub.2 --O--.sub.n CH.sub.2 --COOR where R is hydrogen or an alkyl of 1 to 6 carbon atoms and n is 0 or an integer from 1 to 10, in a water-soluble organic solvent or water at from 80° to 200° C., the components (a), (b) and (c) being employed in a molar ratio of (b):(a):(c)=1:(0.6-1):(0.1-0.6).
Claim 3
Dependent Claim
25 words
A polycondensate as described in claim 1, which is dissolved in a polar organic solvent selected from the group consisting of dimethylformamide, dimethylacetamide and N-methylpyrrolidone.
Claim 4
Dependent Claim
22 words
A polycondensate as described in claim 1, which is dissolved in water after addition of an aqueous ammonia solution or amine solution.
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) | 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 |