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Patent Number: |
7521564 |
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Case ID: |
0 |
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Patent Title:
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Heterocyclic salts of HBS & HCS
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Status: |
ACTIVE |
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Status Date: |
2/3/2010 2:00:49 PM |
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Issue Date:
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4/21/2009 |
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Filed Date:
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8/10/2005 |
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Serial #:
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1/203,577 |
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Assignee Name:
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The United States of America as represented by the Secretary of the Air Force
(Washington,
DC)
N/A
(
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Inventor(s):
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Shackelford, Scott A. |
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Lab Name: |
Propulsion Directorate |
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Location: |
1950 Fifth St., Building 18A
Wright-Patterson AFB, OH 45433-7251 |
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Contact: |
Contact Lab About This Patent |
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BACKGROUND OF THE INVENTION
The invention relates generally to high density propellant fuels, and more specifically, it relates to a new group of propellant fuels and fuel additives that use heterocyclic borane and carborane salt ingrediants.
Neutral borane and carborane compounds are known to be high energy compounds and have been considered for use in both formulated rocket propellant and explosives applications. Heterocyclic ionic solids and liquid salts, containing aromatic
heterocyclic cations, are compounds that exhibit an almost non-existent vapor pressure and high ingredient densities.
Patented art of interest includes the following U.S. patents, the disclosures of which are incorporated herein by reference:
U.S. Pat. No. 4,855,508 entitled "Energetic diethers and process for their preparation" by Chapman, et al.
U.S. Pat. No. 4,424,398 entitled "Process for preparation of energetic plasticizers" by McGuire, et al.
U.S. Pat . . . . More |
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The use of novel new heterocyclic borane and carborane salt ingredients
for use as energetic, high density propellant fuels and fuel additives,
or for gas generator and hydrogen storage applications. These subject and
unique heterocyclic borane and carborane salts are comprised of both
aromatic and non-aromatic heterocyclic cations with the necessary borane
and/or carborane anions. Such salts with partially fluorinated borane or
carborane anions would be candidate ingredients for metallized (e.g.
boron, aluminum) propellant formulations. The high density provided by
these unique heterocyclic borane and carborane compounds will be
attractive for volume-limited propulsion systems.
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What is claimed is:
1. Salt compositions comprising heterocyclic borane salts (HBS) or heterocyclic carborane salts (HCS) or a combination thereof wherein one or more of the cations of salts are
selected from the group below consisting of: ##STR00016## which cations are linked with an anion selected from the group consisting of B.sub.12H.sub.12, R.sub.3NB.sub.12H.sub.11 and CB.sub.11H.sub.12 to form said salts for each of said cations, where R
can be H, alkyl or amino as can R.sub.1, R.sub.2 and R.sub.3.
2. The salts compositions of claim 1 wherein said HBS has the formula of ##STR00017## and said HCS has the formula of ##STR00018## where A is C, N or O in the first ring position, A is C or N in the remaining ring positions and R is H, NH.sub.2
or Alkyl.
3. The salts compositions of claim 1 comprising at least one of said cations and an anion of salts selected from the group consisting of ##STR00019## and ##STR00020##
4. The salts compositions of . . . . More |
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