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US4772722A
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Nadimido-substituted cyclophosphazene
Assignee: Hercules LLC
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Filing: 1986-09-10
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Granted: 1988-09-20
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Expires: 2006-09-10
Abstract
Abstract Disclosed are nadimido-substituted cyclophosphazene derivatives and thermosets thereof. The thermosets are useful as high temperature, flame resistant matrices for composites and as metal adhesives.
Inventors
- 👤 Alexander Lukacs, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:30
CPC Classifications
C; C08; C08L; C08L85/00; C08L85/02; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6564; C07F9/6581; C07F9/65812; C07F9/65814; C08G; C08G79/00; C08G79/02; C08G79/025
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
81 words
A cyclophosphazene derivative having the formula ##STR14## where n is 3 or 4; R 1 and R 2 are the same, different, or vary from one phosphorus atom to the next on the same cyclophosphazene ring and are selected from the group consisting of ##STR15## where R is selected from the group consisting of H or a nonreactive moiety; and an average of at least two of the radicals R 1 and R 2 per cyclophosphazene ring contain a nadimido group.
Claim 2
Dependent Claim
81 words
A cyclophosphazene derivative having the formula ##STR14## where n is 3 or 4; R 1 and R 2 are the same, different, or vary from one phosphorus atom to the next on the same cyclophosphazene ring and are selected from the group consisting of ##STR15## where R is selected from the group consisting of H or a nonreactive moiety; and an average of at least two of the radicals R 1 and R 2 per cyclophosphazene ring contain a nadimido group.
Claim 3
Dependent Claim
19 words
The cyclophosphazene derivative of claim 1 wherein all of the radicals R 1 and R 2 are nadimidophenoxy radicals.
Claim 4
Dependent Claim
31 words
The cyclophosphazene derivative of claim 1 wherein half of the radicals R 1 and R 2 are phenoxy radicals and the remaining radicals R 1 and R 2 are nadimidophenoxy radicals.
References Cited (Backward Citations)
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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) | 1991-09-20 | 1992-03-21 | 1992-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-20 | 1996-03-21 | 1996-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-20 | 2000-03-21 | 2000-09-20 | $7700.00 | Window Closed / Lapsed |