US4424085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite solid propellant containing FeOOH as burning rate modifier
Assignee: Nissan Motor Co Ltd
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Filing: 1981-09-09
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Granted: 1984-01-03
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Expires: 2001-09-09
Abstract
Abstract The burning rate of a composite solid propellant comprising ammonium perchlorate and a fuel binder such as polysulfide, polyurethane or polybutadiene can remarkably be increased by the addition of a small amount of FeOOH. Considering the mechanical properties of the propellant, the maximum amount of FeOOH is preferably limited to 7 Wt % of the toatal of the fuel binder and ammonium perchlorate. It is possible to jointly use FeOOH and Fe 2 O 3 on condition that the weight ratio of FeOOH to Fe 2 O 3 is at least 10:90 and that the total weight of FeOOH and Fe 2 O 3 is in the range from 0.9 to 7% of the total weight of the fuel binder and ammonium perchlorate.
Inventors
- 👤 Daizo Fukuma
- 👤 Hisao Okamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:21
CPC Classifications
C; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
20 words
A composite solid propellant comprising ammonium perchlorate as oxidizer, an organic fuel binder and FeOOH as a burning rate modifier.
Claim 2
Dependent Claim
20 words
A composite solid propellant comprising ammonium perchlorate as oxidizer, an organic fuel binder and FeOOH as a burning rate modifier.
Claim 3
Dependent Claim
37 words
A composite solid propellant according to claim 1, wherein the amount of said FeOOH is greater than zero and not larger than 7% by weight of the total quantity of said ammonium perchlorate and said fuel binder.
Claim 4
Dependent Claim
50 words
A composite solid propellant comprising ammonium perchlorate as the oxidizer, an organic fuel binder and FeOOH as a sole burning rate modifier, the amount of said FeOOH being greater than zero and not larger than 7% by weight of the total quantity of said ammonium perchlorate and said fuel binder.
Claim 5
Dependent Claim
50 words
A composite solid propellant comprising ammonium perchlorate as the oxidizer, an organic fuel binder and FeOOH as a sole burning rate modifier, the amount of said FeOOH being greater than zero and not larger than 7% by weight of the total quantity of said ammonium perchlorate and said fuel binder.
Claim 6
Dependent Claim
33 words
A composite solid propellant according to claim 3, wherein the amount of said FeOOH is not smaller than 0.9% by weight of the total quantity of said ammonium perchlorate and said fuel binder.
Claim 7
Dependent Claim
29 words
A composite solid propellant according to claim 4, wherein said FeOOH is in the form of a fine powder having a mean particle size not larger than 1 μm.
Claim 8
Dependent Claim
73 words
A composite solid propellant comprising ammonium perchlorate as oxidizer, an organic fuel binder and a burning rate increasing additive which consists of FeOOH and Fe 2 O 3 , the weight ratio of FeOOH to Fe 2 O 3 in said additive being not smaller than 10:90, the total weight of said additive being in the range from 0.9 to 7% of the total weight of said ammonium perchlorate and said fuel binder.
Claim 9
Dependent Claim
73 words
A composite solid propellant comprising ammonium perchlorate as oxidizer, an organic fuel binder and a burning rate increasing additive which consists of FeOOH and Fe 2 O 3 , the weight ratio of FeOOH to Fe 2 O 3 in said additive being not smaller than 10:90, the total weight of said additive being in the range from 0.9 to 7% of the total weight of said ammonium perchlorate and said fuel binder.
Claim 10
Dependent Claim
27 words
A composite solid propellant according to claim 6, wherein the weight ratio of FeOOH to Fe 2 O 3 in said additive is not smaller than 20:80.
Claim 11
Dependent Claim
32 words
A composite solid propellant according to claim 6, wherein FeOOH in said additive amounts to at least 0.3% by weight of the total quantity of said ammonium perchlorate and said fuel binder.
Claim 12
Dependent Claim
32 words
A composite solid propellant according to claim 6, wherein the total weight of said additive is not greater than 5% of the total weight of said ammonium perchlorate and said fuel binder.
Claim 13
Dependent Claim
25 words
A composite solid propellant according to claim 6, wherein said additive is a mixture of a FeOOH powder and a Fe 2 O 3 powder.
Claim 14
Dependent Claim
29 words
A composite solid propellant according to claim 6, wherein said additive is a Fe 2 O 3 powder containing FeOOH in the crystals of Fe 2 O 3 .
Claim 15
Dependent Claim
24 words
A composite solid propellant according to claim 11, wherein said Fe 2 O 3 powder is prepared by incomplete dehydration of Fe(OH) 3 .
Claim 16
Dependent Claim
29 words
A composite solid propellant according to any one of claims 1, 3 and 6, wherein said fuel binder is selected from the group consisting of polysulfides, polyurethanes and polybutadienes.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-02 | 1987-07-04 | 1988-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-02 | 1991-07-04 | 1992-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-02 | 1995-07-04 | 1996-01-03 | $7700.00 | Window Closed / Lapsed |