US3922252A
Expired / Lapsed
US
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Polyamideimide compositions
Assignee: General Electric Co
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Filing: 1973-09-10
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Granted: 1975-11-25
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Expires: 1993-09-10
Abstract
Abstract Polyamideimide compositions are prepared by reacting tricarboxylic anhydride and glycol and further reacting with polyamine and optionally polyisocyanate.
Inventors
- 👤 Fred R Holub
- 👤 Peter J Cacciotti
- 👤 Denis R Pauze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:33
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/14; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/60; C08G18/606
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
47 words
THE PROCESS OF PREPARING POLYAMIDEIMIDE WHICH COMPRISES (A) REACTING TRICARBOXYLIC ACID ANHYDRIDE MATERIAL WITH DIOL, (B) REACTING THE REACTION PRODUCT OF 8A) WITH POLY-PRIMARY AMINE IN ABOUT EQUIMOLAR AMOUNT WITH RESPECT TO SAID ANHYDRIDE AND (C) HEATING THE REACTION PRODUCT OF (B) TO REMOVE SUBSTANTIALLY ALL DIOL.
Claim 2
Dependent Claim
47 words
THE PROCESS OF PREPARING POLYAMIDEIMIDE WHICH COMPRISES (A) REACTING TRICARBOXYLIC ACID ANHYDRIDE MATERIAL WITH DIOL, (B) REACTING THE REACTION PRODUCT OF 8A) WITH POLY-PRIMARY AMINE IN ABOUT EQUIMOLAR AMOUNT WITH RESPECT TO SAID ANHYDRIDE AND (C) HEATING THE REACTION PRODUCT OF (B) TO REMOVE SUBSTANTIALLY ALL DIOL.
Claim 3
Dependent Claim
15 words
A process as in claim 1 where the final product is further reacted with polyisocyanate.
Claim 4
Dependent Claim
13 words
The process of claim 1 where the tricarboxylic acid material is trimellitic anhydride.
Claim 5
Dependent Claim
19 words
The process of claim 1 wherein a part of the tricarboxylic acid material is substituted with dicarboxylic acid material.
Claim 6
Dependent Claim
24 words
The process of claim 1 wherein the tricarboxylic acid material is trimellitic anhydride, the diol is ethylene glycol, and the polyamine is methylene dianiline.
Claim 7
Dependent Claim
9 words
The product obtained by the reaction of claim 1.
Claim 8
Dependent Claim
9 words
The product obtained by the reaction of claim 2.
Claim 9
Dependent Claim
29 words
The process of preparing polyamideimide which comprises reacting a. tricarboxylic acid anhydride material, b. diol, and c. poly-primary amine, and heating said reaction product to remove substantially all diol.
Claim 10
Dependent Claim
29 words
The process of preparing polyamideimide which comprises reacting a. tricarboxylic acid anhydride material, b. diol, and c. poly-primary amine, and heating said reaction product to remove substantially all diol.
Claim 11
Dependent Claim
5 words
The product of claim 8.
Claim 12
Dependent Claim
14 words
The process of claim 8 wherein the final product is further reacted with polyisocyanate.
Claim 13
Dependent Claim
5 words
The product of claim 10.
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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |