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US4026904A
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Aromatic epoxy-terminated polyimides
Assignee: University of Notre Dame
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Filing: 1976-02-25
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Granted: 1977-05-31
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Expires: 1996-02-25
Abstract
Abstract Aromatic epoxy-terminated aromatic polyimides and processes for their preparation are provided. The epoxidized polyimides are prepared by epoxidizing an olefinically unsaturated aromatic imide of the formula: <IMAGE> +TR <IMAGE> WHEREIN Ar is a divalent aromatic organic radical, Ar' is a tetravalent aromatic organic radical, the four carbonyl groups being attached directly to separate carbon atoms and each pair of carbonyl groups being attached to adjacent carbon atoms in the Ar' radical, R' is a divalent aromatic hydrocarbon radical, and N IS A POSITIVE INTEGER OF AT LEAST 1.
Inventors
- 👤 Gaetano F. D'Alelio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:47
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1057; C08G73/1064; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/26; C08G73/1003; C08G73/1007; C08G73/101; C08G73/1067; C08G73/1071
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
133 words
An epoxidized aromatic polyimide having the structural formula: ##STR9## wherein Ar is a divalent radical selected from the group consisting of ##STR10## and multiples thereof not exceeding four connected to each other by R, wherein R is alkylene of 1 to 3 carbon atoms, ##STR11## --O--, --S--, --CH═CH-- or --SO 2 --, Ar' is a tetravalent aromatic organic radical selected from the group consisting of ##STR12## wherein R" is --CH 2 --, --C 2 H 4 --, --C 3 H 6 --, --O-- or --SO 2 --, R' is a divalent radical selected from the group consisting of --C 6 H 4 --, --CH 2 C 6 H 4 --, C 10 H 6 --, and --CH 2 C 10 H 6 --, and n is a positive integer of 1 to 100.
Claim 2
Dependent Claim
133 words
An epoxidized aromatic polyimide having the structural formula: ##STR9## wherein Ar is a divalent radical selected from the group consisting of ##STR10## and multiples thereof not exceeding four connected to each other by R, wherein R is alkylene of 1 to 3 carbon atoms, ##STR11## --O--, --S--, --CH═CH-- or --SO 2 --, Ar' is a tetravalent aromatic organic radical selected from the group consisting of ##STR12## wherein R" is --CH 2 --, --C 2 H 4 --, --C 3 H 6 --, --O-- or --SO 2 --, R' is a divalent radical selected from the group consisting of --C 6 H 4 --, --CH 2 C 6 H 4 --, C 10 H 6 --, and --CH 2 C 10 H 6 --, and n is a positive integer of 1 to 100.
Claim 3
Dependent Claim
22 words
The epoxidized polyimide of claim 1 wherein Ar' is selected from the group consisting of ##STR13## and n is 4 to 100.
Claim 4
Dependent Claim
10 words
The epoxidized polyimide of claim 2 wherein R' is phenylene.
References Cited (Backward Citations)
US3700617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-30 | 1980-11-29 | 1981-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-30 | 1984-11-29 | 1985-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-30 | 1988-11-29 | 1989-05-31 | $7700.00 | Window Closed / Lapsed |