US4925505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foamed nitroparaffin explosive composition
Assignee: Department of National Defence
•
Filing: 1989-05-16
•
Granted: 1990-05-15
•
Expires: 2009-05-16
Abstract
Abstract The invention disclosed is a foamable fluid explosive composition which is capable of being projected over suspect terrain to form a continuous blanket of explosive foam which may be detonated by conventional means. The novel fluid explosive composition comprises -a suitable liquid foamable explosive 57-98%/w -a suitable liquid emulsifier 2-6%/w -a suitable stabilizer 0-5%/w -a suitable thickener 0-7%/w -a sensitizer 0-5%/w -energy enhancer/inert metals 0-20%/w - wherein the amounts of ingredients are expressed as percent by weight of the composition, excepting the sensitizer which is expressed as percent by weight of the explosive. The same fluid explosive composition is adapted for aerosol delivery by including a suitable compressed liquified gas as propellant.
Inventors
- 👤 Mark A. Baker
- 👤 C. John Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:44
CPC Classifications
C; C06; C06B; C06B45/00; C06B25/00; C06B25/36
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
61 words
A foamable fluid explosive composition, comprising ______________________________________
a suitable liquid foamable explosive
57-98%/w
a suitable liquid emulsifier
2-6%/w
a suitable stabilizer 0-5%/w
a suitable thickener 0-7%/w
a sensitizer 0-5%/w
energy enhancer/inert metals
0-20%/w
______________________________________ wherein the amounts of ingredients are expressed as percent by weight of the composition, excepting the sensitizer which is expressed as percent by weight of the explosive.
Claim 2
Dependent Claim
61 words
A foamable fluid explosive composition, comprising ______________________________________
a suitable liquid foamable explosive
57-98%/w
a suitable liquid emulsifier
2-6%/w
a suitable stabilizer 0-5%/w
a suitable thickener 0-7%/w
a sensitizer 0-5%/w
energy enhancer/inert metals
0-20%/w
______________________________________ wherein the amounts of ingredients are expressed as percent by weight of the composition, excepting the sensitizer which is expressed as percent by weight of the explosive.
Claim 3
Dependent Claim
25 words
A composition according to claim 1, wherein the explosive is a nitroparaffin selected from the group consisting of nitromethane, nitroethane, 1-nitropropane, 2-nitropropane and mixtures thereof.
Claim 4
Dependent Claim
18 words
A composition according to claim 2, wherein the emulsifier is a long chain hydrocarbon with polar head groups.
Claim 5
Dependent Claim
17 words
A composition according to claim 3, wherein the stabilizer, if present, is a long chain aliphatic alcohol.
Claim 6
Dependent Claim
27 words
A composition according to claim 4, wherein the thickener, if present, is selected from the group consisting of fumed silica, nitrocellulose, cellulose acetate and modified guar gum.
Claim 7
Dependent Claim
24 words
A composition according to claim 5, wherein the sensitizer, if present, is selected from the group consisting of strong acids, strong bases and amines.
Claim 8
Dependent Claim
18 words
A composition according to claim 6, wherein the energy enhancer, if present, is a finely divided energetic metal.
Claim 9
Dependent Claim
26 words
A composition according to claim 7, wherein the inert metal, if present, is selected from the group consisting of finely divided lead and finely divided copper.
Claim 10
Dependent Claim
39 words
A composition according to claim 8, wherein the composition additionally comprises 1-20% by weight based on the weight of the composition of a compressed liquified gas selected from the group consisting of propane, butane, propylene, carbon dioxide and chlorofluorocarbons.
Claim 11
Dependent Claim
11 words
A composition according to claim 9, wherein the nitroparaffin is nitromethane.
Claim 12
Dependent Claim
15 words
A composition according to claim 10, wherein the emulsifier, if present, is a poly-loweralkoxylated alcohol.
Claim 13
Dependent Claim
16 words
A composition according to claim 11, wherein the emsulifier, if present, is a polyethoxylated stearyl alcohol.
Claim 14
Dependent Claim
13 words
A composition according to claim 12, wherein the stabilizer, if present, is octadecanol.
Claim 15
Dependent Claim
28 words
A composition according to claim 13, wherein the sensitizer, if present, is an organic amine selected from the group consisting of ethylene diamine, diethylene triamine and triethylene tetramine.
Claim 16
Dependent Claim
14 words
A composition according to claim 14, wherein the energetic metal, if present, is aluminum.
Claim 17
Dependent Claim
14 words
A composition according to claim 15, wherein the thickener, if present, is fumed silica.
Claim 18
Dependent Claim
13 words
A composition according to claim 15, wherein the thickener, if present, is nitrocellulose.
Claim 19
Dependent Claim
12 words
A composition according to claim 16, wherein the liquified gas is propane.
Claim 20
Dependent Claim
12 words
A composition according to claim 17, wherein the liquified gas is propane.
Claim 21
Dependent Claim
17 words
A composition according to claim 9, wherein the density of the resulting foam is from 0.07-0.50 g/cc.
Claim 22
Dependent Claim
17 words
A composition according to claim 9, wherein the density of the resulting foam is from 0.14-0.40 g/cc.
Claim 23
Dependent Claim
53 words
A foamable fluid explosive composition, comprising ______________________________________
Weight Percent
______________________________________
Nitromethane 86
polyethoxylated stearyl alcohol
3
octadecanol 2
ethylene diamine 4
propane (liquified) 5
______________________________________ wherein the amounts of ingredients are expressed as percent by weight of the composition, excepting the ethylene diamine which is expressed as percent by weight of the nitromethane.
Claim 24
Dependent Claim
53 words
A foamable fluid explosive composition, comprising ______________________________________
Weight Percent
______________________________________
Nitromethane 86
polyethoxylated stearyl alcohol
3
octadecanol 2
ethylene diamine 4
propane (liquified) 5
______________________________________ wherein the amounts of ingredients are expressed as percent by weight of the composition, excepting the ethylene diamine which is expressed as percent by weight of the nitromethane.
Claim 25
Dependent Claim
42 words
A foamable fluid explosive composition, comprising ______________________________________
Weight Percent
______________________________________
nitromethane 78.0
polyethoxylated stearyl alcohol
3.6
octadecanol 2.3
nitrocellulose 1.4
aluminum powder 9.2
propane (liquified) 5.5
100.0
______________________________________ wherein the amounts of ingredients are expressed as percent by weight of the composition.
Claim 26
Dependent Claim
42 words
A foamable fluid explosive composition, comprising ______________________________________
Weight Percent
______________________________________
nitromethane 78.0
polyethoxylated stearyl alcohol
3.6
octadecanol 2.3
nitrocellulose 1.4
aluminum powder 9.2
propane (liquified) 5.5
100.0
______________________________________ wherein the amounts of ingredients are expressed as percent by weight of the composition.
Claim 27
Dependent Claim
38 words
A foamable fluid explosive composition, comprising ______________________________________
Weight Percent
______________________________________
nitromethane 91.0
polyethoxylated stearyl alcohol
4.0
fumed silica 3.5
propane (liquified) 1.5
100.0
______________________________________ wherein the amounts of ingredients are expressed as percent by weight of the composition.
Claim 28
Dependent Claim
38 words
A foamable fluid explosive composition, comprising ______________________________________
Weight Percent
______________________________________
nitromethane 91.0
polyethoxylated stearyl alcohol
4.0
fumed silica 3.5
propane (liquified) 1.5
100.0
______________________________________ wherein the amounts of ingredients are expressed as percent by weight of the composition.
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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) | 1993-05-14 | 1993-11-13 | 1994-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-14 | 1997-11-13 | 1998-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-14 | 2001-11-13 | 2002-05-15 | $7700.00 | Window Closed / Lapsed |