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US4391967A
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Polyimides-polyamides from tricyclo [4.2.1.02,5 ] nonane-3,4-dimethyl-3,4,7,8-tetracarboxylic acid dianhydride and dicarboxylic acids
Assignee: BP Corp North America Inc
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Filing: 1982-09-29
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Granted: 1983-07-05
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Expires: 2002-09-29
Abstract
Abstract This invention relates to novel polyimides-polyamides and copolyimides-polyamides prepared from the novel nonaromatic dianhydrides or mixtures of these with other dianhydrides. Tricyclo [4.2.1.0 2 ,5 ] nonane-3,4-dimethyl-3,4,7,8-tetracarboxylic acid dianhydride (I). I is used to prepare novel polyimides-polyamides which are useful in preparing molded articles, fibers, laminates and coatings.
Inventors
- 👤 Tayseer S. Nimry
- 👤 Ellis K. Fields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:37
CPC Classifications
C; C07; C07C; C07C61/00; C07C61/12; C07C61/125; C07C61/135; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1042; C08G73/1046; C08G73/105; C08G73/1057; C08G73/1064; C08G73/1075; C08G73/1078; C08G73/14; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31721; Y10T428/31725
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
69 words
A polyimide-polyamide comprising the following recurring structure: ##STR7## wherein R' is the same or different divalent aliphatic, cycloaliphatic, araliphatic or aromatic hydrocarbon radicals the term "R has the same meaning as R' or is an aromatic hydrocarbon having from about 6 to about 10 carbon atoms joined directly or by a stable linkage selected from the group consisting of --O--, methylene, ##STR8## --SO--, --SO 2 -- or --S-- radicals".
Claim 2
Dependent Claim
69 words
A polyimide-polyamide comprising the following recurring structure: ##STR7## wherein R' is the same or different divalent aliphatic, cycloaliphatic, araliphatic or aromatic hydrocarbon radicals the term "R has the same meaning as R' or is an aromatic hydrocarbon having from about 6 to about 10 carbon atoms joined directly or by a stable linkage selected from the group consisting of --O--, methylene, ##STR8## --SO--, --SO 2 -- or --S-- radicals".
Claim 3
Dependent Claim
21 words
The polyimide-amide of claim 1 wherein R and R' are divalent aliphatic hydrocarbons from about 2 to about 18 carbon atoms.
Claim 4
Dependent Claim
19 words
The polyimide-amide of claim 1 wherein R and R' are divalent aromatic hydrocarbons from 6 to 20 carbon atoms.
Claim 5
Dependent Claim
38 words
The polyimide-polyamide of claim 1 wherein R comprises from about 6 to about 10 carbon atoms joined directly or by stable linkage selected from the group consisting of --O--, methylene, ##STR9## --SO--, --SO 2 -- or --S-- radicals.
Claim 6
Dependent Claim
16 words
The polyimide-amide of claim 1 wherein the polyimide-amide is in the form of a molded object.
Claim 7
Dependent Claim
15 words
The polyimide-amide of claim 1 wherein the polyimide-amide is in the form of a fiber.
Claim 8
Dependent Claim
15 words
The polyimide of claim 1 wherein the polyimide is in the form of a film.
Claim 9
Dependent Claim
20 words
The polyimide of claim 1 wherein the polyimide is in the form of a metal coating suitable for electrical service.
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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) | 1986-07-04 | 1987-01-03 | 1987-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-04 | 1991-01-03 | 1991-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-04 | 1995-01-03 | 1995-07-05 | $7700.00 | Window Closed / Lapsed |