EP0520104A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Non-self-deflagrating fuel compositions for high regression rate hybrid rocket motor application
Assignee: ATK Launch Systems LLC
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Filing: 1991-06-27
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Granted: —
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Expires: 2011-06-27
Abstract
Abstract Hybrid rocket motor fuel grain compositions with high regression rates (0.05 to 0.15 ips) are obtained in which conventional oxidizers are used at relatively low oxidizer mass fluxes. The compositions include an energetic polymer, preferably a polymer of glycidyl azide in a matrix of inert polymer such as polybutadiene. A preferred composition comprises glycidyl azide polymer (24%), hydroxy terminated polybutadiene (56%) and metallic Al (20%). The composition is cured with an isocyanate.
Inventors
- 👤 Gary K. Lund
- 👤 Richard B. Cragun
- 👤 Daniel W. Doll
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 20:17
CPC Classifications
C; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C06B45/105
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
67 words
A hybrid rocket motor fuel composition comprising a liquid azide polymer blended with or co-cured with an inert polymeric binder for the same, the proportions of azide polymer in the composition being between 1% and 70% by weight and the proportions of inert polymeric binder in the composition being between 8 1/2 and 99% by weight, the relative proportions being such that the composition is non- self-deflagrating.
Claim 2
Dependent Claim
16 words
The composition claimed in claim 1, wherein the azide polymer is a polymer of glycidyl azide.
Claim 3
Dependent Claim
38 words
The composition claimed in claim 1 or 2, wherein the binder is a polymer or copolymer selected from the group consisting of polybutadiene, substituted polybutadienes, polybutadiene copolymers, polybutene, polyisobutylene, polysulfide polymers, polyethylene, natural and synthetic rubbers, and polytetrahydrofuran.
Claim 4
Dependent Claim
13 words
The composition claimed in claim 3, wherein the binder is a substituted polybutadiene.
Claim 5
Dependent Claim
18 words
The composition claimed in claim 3, wherein the binder is a hydroxy terminated or a carboxy terminated polybutadiene.
Claim 6
Dependent Claim
11 words
The composition claimed in claim 3, wherein the binder is polytetrahydrofuran.
Claim 7
Dependent Claim
13 words
The composition claimed in any preceding claim, including, in addition, a free metal.
Claim 8
Dependent Claim
21 words
The composition claimed in claim 7, wherein the metal is selected from the group consisting of Al, Mg, Zn and W.
Claim 9
Dependent Claim
31 words
The composition claimed in any preceding claim, including, in addition, at least one nitrogen compound selected from the group consisting of tetrazoles, triazoles, aliphatic nitriles, nitrocellulose, ammonium nitrate and mixtures thereof.
Claim 10
Dependent Claim
12 words
The composition claimed in claim 9, in which the compound is 5-aminotetrazole.
Claim 11
Dependent Claim
12 words
The composition claimed in claim 9, in which the compound is 3-amino-1,2,4-triazole.
Claim 12
Dependent Claim
12 words
The composition claimed in any preceding claim, including, in addition, carbon black.
Claim 13
Dependent Claim
21 words
The composition claimed in any preceding claim, wherein the binder comprises between 8 1/12 and 95% by weight of the composition.
Claim 14
Dependent Claim
17 words
The composition claimed in any preceding claim, including, in addition, a curing agent for said polymeric binder.
Claim 15
Dependent Claim
21 words
A hybrid rocket motor fuel composition comprising by weight: 24% glycidyl azide polymer 56% hydroxy terminated polybutadiene and 20% aluminum powder.
References Cited (Backward Citations)
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