US4258172A
Expired / Lapsed
US
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Alkylated phosphazene oligomers and polymers and method of preparation thereof
Assignee: United States Department of the Navy
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Filing: 1979-09-25
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Granted: 1981-03-24
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Expires: 1999-09-25
Abstract
Abstract Alkylated phosphazene oligomers of the general formula (NP(X2))nNPRH, wherein X represents chlorine or bromine, R represents a linear or branched alkyl, and n represents an integer from 2 to 8, are prepared by reacting, in a nonoxidizing atmosphere, a perhalopolyphosphazene, a Grignard reagent, and a cuprous complex in solution, followed by the addition of a secondary or tertiary alcohol. Polymers useful as high-temperature elastomers, are prepared from the halo-substituted oligomers by heating them at a temperature from about 200 DEG C. to about 300 DEG C., followed by a reaction with an amine, metal alkoxide, or a metal aryloxide at a temperature from 20 DEG to 200 DEG C.
Inventors
- 👤 Harry R. Allcock
- 👤 Paul J. Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:56
CPC Classifications
C; C08; C08G; C08G73/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
52 words
A phosphazene polymer having the formula: {8 NP(Y 2 )] n NPRH} m wherein Y represents chlorine, bromine, alkoxy, aryloxy, and amino groups, R represents a linear or branched alkyl, n represents an integer from 2 to 8, and m is an average value and is any value from 2 to 20,000.
Claim 2
Dependent Claim
52 words
A phosphazene polymer having the formula: {8 NP(Y 2 )] n NPRH} m wherein Y represents chlorine, bromine, alkoxy, aryloxy, and amino groups, R represents a linear or branched alkyl, n represents an integer from 2 to 8, and m is an average value and is any value from 2 to 20,000.
Claim 3
Dependent Claim
19 words
The polymer of claim 1 wherein said alkoxy group is linear and has from 1 to 8 carbon atoms.
Claim 4
Dependent Claim
31 words
The polymer of claim 2 wherein said alkoxy group is branched, has 1 to 8 carbon atoms in the backbone, and has from 1 to 4 carbon atoms in any branch.
Claim 5
Dependent Claim
15 words
The polymer of claim 1 wherein said aryloxy has from 6 to 10 carbon atoms.
Claim 6
Dependent Claim
16 words
The polymer of claim 1 wherein said amino group has from 1 to 8 carbon atoms.
References Cited (Backward Citations)
US3453235A
Cited
US4136084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-23 | 1984-09-22 | 1985-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-23 | 1988-09-22 | 1989-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-23 | 1992-09-22 | 1993-03-24 | $7700.00 | Window Closed / Lapsed |