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US4050969A
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US
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Catalytic system and polyurethane propellants
Assignee: United States Department of the Air Force
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Filing: 1976-09-29
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Granted: 1977-09-27
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Expires: 1996-09-29
Abstract
Abstract A catalytic system for use in the formation of polyurethane propellants in which compounds of the type Fe (AA)2X, where AA is the acetylacetonate radical and X is an acid radical. These compounds have been found to be valuable catalysts for promoting the alcohol-isocyanate reaction at room temperature.
Inventors
- 👤 Adolf E. Oberth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:48
CPC Classifications
C; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/222
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
48 words
In a propellant composition comprising: a. an oxidizer component; b. a polyurethane fuel component; and c. the improvement comprising as a curing catalyst a ferric compound selected from the group consisting of ferric bis(acetylacetonato) chloride, ferric bis (acetylacetonato) perchlorate, ferric bis (acetylacetonato) mandalate, and ferric bis (acetylacetonato) p-toluenesulfonate.
Claim 2
Dependent Claim
48 words
In a propellant composition comprising: a. an oxidizer component; b. a polyurethane fuel component; and c. the improvement comprising as a curing catalyst a ferric compound selected from the group consisting of ferric bis(acetylacetonato) chloride, ferric bis (acetylacetonato) perchlorate, ferric bis (acetylacetonato) mandalate, and ferric bis (acetylacetonato) p-toluenesulfonate.
Claim 3
Dependent Claim
17 words
A propellant composition in accordance with claim 1 wherein said curing catalyst is ferric bis (acetylacetonato) chloride.
Claim 4
Dependent Claim
17 words
A propellant composition in accordance with claim 1 wherein said curing catalyst is ferric bis (acetylacetonato) perchlorate.
Claim 5
Dependent Claim
17 words
A propellant composition in accordance with claim 1 wherein said curing catalyst is ferric bis (acetylacetonato) p-toluenesulfonate.
References Cited (Backward Citations)
US3811967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |