US3953260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gossypol, an abundant, low-cost iron deactivator, pot-life extender, and processing aid for HTPB propellants
Assignee: United States Department of the Navy
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Filing: 1975-05-23
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Granted: 1976-04-27
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Expires: 1995-05-23
Abstract
Abstract In a method wherein propellant ingredients including a hydroxy terminated binder, an isocyanate curative therefor and transition metal compounds or traces thereof are mixed, worked into a suitable container and allowed to cure, gossypol is used to prolong the potlife of the propellant mix. Gossypol is dissolved in a portion of the hydroxy terminated binder material and the solution is utilized as a portion of the total binder. Final formulations containing from 0.02 to 0.1 weight percent gossypol are preferred although more gossypol may be used.
Inventors
- 👤 John D. Braun
- 👤 M. Frank Pickett
- 👤 Howard W. Gerrish, Jr.
- 👤 Hans B. Jonassen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:36
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/69; C06; C06B; C06B23/00; C06B23/009; C08G18/08; C08G18/089
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
50 words
In a method for mixing propellants comprising the steps of mixing solid particles with a hydroxy terminated polymeric binder, adding an isocyanate curative, working the resulting mixture into a suitable container and allowing it to cure, the improvement residing in adding gossypol to the mix to increase its pot life.
Claim 2
Dependent Claim
50 words
In a method for mixing propellants comprising the steps of mixing solid particles with a hydroxy terminated polymeric binder, adding an isocyanate curative, working the resulting mixture into a suitable container and allowing it to cure, the improvement residing in adding gossypol to the mix to increase its pot life.
Claim 3
Dependent Claim
26 words
A method according to claim 1 wherein an amount of gossypol sufficient to yield a final mix containing 0.02 to 0.1 weight percent gossypol is added.
Claim 4
Dependent Claim
19 words
A method according to claim 1 wherein the gossypol added is in the form of a gossypol-acetic acid complex.
Claim 5
Dependent Claim
20 words
A method according to claim 1 wherein at least a portion of said solid particles is a transition metal compound.
Claim 6
Dependent Claim
15 words
A method according to claim 4 wherein said transition metal compound is an iron compound.
Claim 7
Dependent Claim
14 words
A method according to claim 5 wherein said iron compound is yellow iron oxide.
Claim 8
Dependent Claim
22 words
A method according to claim 1 wherein gossypol is used as a processing aid in propellant, reducing end-of-mix viscosity in said propellant.
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) | 1979-04-27 | 1979-10-27 | 1980-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-27 | 1983-10-27 | 1984-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-27 | 1987-10-27 | 1988-04-27 | $7700.00 | Window Closed / Lapsed |