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US4045261A
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Molecular sieve containing stabilization system for urethane - crosslinked double base propellant
Assignee: United States Department of the Navy
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Filing: 1976-08-02
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Granted: 1977-08-30
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Expires: 1996-08-02
Abstract
Abstract A dual stabilization system for urethane - crosslinked double base propellant. The stabilization system includes N-Methyl-p-Nitroaniline and Aluminum Silicate molecular sieve. The two stabilizers function in a complementary fashion wherein the N-Methyl-p-Nitroaniline reacts with and makes harmless the nitrogen (III) oxide during the propellant aging process. The Aluminum Silicate molecular sieve is selected to have a pore size of more than about 10 angstroms and reacts with and makes harmless the nitrogen (V) oxides, primarily nitric acid, during the propellant aging process.
Inventors
- 👤 Robert J. Baczuk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:32
CPC Classifications
C; C06; C06B; C06B23/00; C06B23/006; Y; Y10; Y10S; Y10S149/00; Y10S149/11
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
21 words
A solid urethane - crosslinked double base propellant comprising nitrocellulose, nitroglycerin, HMX, amonium perchlorate, aluminum, N-Methyl-p-Nitroaniline and aluminum silicate molecular sieve.
Claim 2
Dependent Claim
21 words
A solid urethane - crosslinked double base propellant comprising nitrocellulose, nitroglycerin, HMX, amonium perchlorate, aluminum, N-Methyl-p-Nitroaniline and aluminum silicate molecular sieve.
Claim 3
Dependent Claim
24 words
The propellant composition of claim 1, wherein said aluminum silicate molecular sieve has a pore size selected to be greater than about 10 angstroms.
Claim 4
Dependent Claim
33 words
The propellant composition of claim 2 wherein said N-Methyl-p-Nitroaniline comprises about 2.0 percent by weight of said propellant and said aluminum silicate molecular sieve comprises about 0.2 percent by weight of 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) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |