US5411615A
Expired / Lapsed
US
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Aluminized eutectic bonded insensitive high explosive
Assignee: Northrop Grumman Innovation Systems LLC
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Filing: 1993-10-04
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Granted: 1995-05-02
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Expires: 2013-10-04
Abstract
Abstract An insensitive high explosive is obtained by using a dicyandiamide (DCDA), ammonium nitrate (AN), guanidine nitrate (GN), ethylene diamine dinitrate (EDDN) eutectic melt binder in combination with ammonium perchlorate (AP) oxidizer, fine RDX (1 mu m to 10 mu m particle size), and aluminum metal as a fuel. The fine RDX particles improve performance, boosterability, and sensitivity. The inclusion of AP greatly improves air blast by adding oxygen to the reaction and insuring complete combustion of the ingredients. The aluminum extends the pressure pulse. The ratio of materials is formulated to obtain the lowest known processing temperature.
Inventors
- 👤 Theodore S. Sumrail
- 👤 William H. Graham
- 👤 Carl M. Rector
- 👤 Joey M. Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:20
CPC Classifications
C; C06; C06B; C06B33/00; C06B33/12; C06B33/14; C06B21/00; C06B21/0033; C06B21/005; C06B31/00; C06B31/28; C06B31/32
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
47 words
An insensitive high performance explosive composition comprising: a eutectic melt comprising dicyandiamide (DCDA), ammonium nitrate (AN), guanidine nitrate (GN), ethylene diamine dinitrate (EDDN); 1,3,5-trinitro-1,3,5-triaza-cyclohexane (RDX) having a particle size in the range from about 1 μm to about 10 μm; ammonium perchlorate (AP); and a reactive metal.
Claim 2
Dependent Claim
47 words
An insensitive high performance explosive composition comprising: a eutectic melt comprising dicyandiamide (DCDA), ammonium nitrate (AN), guanidine nitrate (GN), ethylene diamine dinitrate (EDDN); 1,3,5-trinitro-1,3,5-triaza-cyclohexane (RDX) having a particle size in the range from about 1 μm to about 10 μm; ammonium perchlorate (AP); and a reactive metal.
Claim 3
Dependent Claim
24 words
An insensitive high performance explosive composition as defined in claim 1, wherein the reactive metal is aluminum, magnesium, boron, titanium, zirconium, or mixtures thereof.
Claim 4
Dependent Claim
17 words
An insensitive high performance explosive composition as defined in claim 1, wherein the reactive metal is aluminum.
Claim 5
Dependent Claim
18 words
An insensitive high performance explosive composition as defined in claim 1, further comprising an AN phase stabilizing material.
Claim 6
Dependent Claim
21 words
An insensitive high performance explosive composition as defined in claim 4, wherein the AN phase stabilizing material is potassium nitrate (KN).
Claim 7
Dependent Claim
19 words
An insensitive high performance explosive composition as defined in claim 4, wherein the AN phase stabilizing material is zinc.
Claim 8
Dependent Claim
41 words
An insensitive high performance explosive composition as defined in claim 1, wherein the DCDA, AN, and GN forming the eutectic melt are present in the following weight ratio: 25% to 30% DCDA, 50% to 55% AN, and 15% to 20% GN.
Claim 9
Dependent Claim
46 words
An insensitive high performance explosive composition as defined in claim 1, wherein the DCDA, AN, GN, and EDDN forming the eutectic melt are present in the following weight ratio: 20% to 25% DCDA, 35% to 40% AN, 10% to 15% GN, and 25% to 30% EDDN.
Claim 10
Dependent Claim
32 words
An insensitive high performance explosive composition as defined in claim 1, wherein the ammonium perchlorate is present in the explosive composition in the range from about 10% to about 60%, by weight.
Claim 11
Dependent Claim
32 words
An insensitive high performance explosive composition as defined in claim 1, wherein the ammonium perchlorate is present in the explosive composition in the range from about 10% to about 30%, by weight.
Claim 12
Dependent Claim
32 words
An insensitive high performance explosive composition as defined in claim 1, wherein the reactive metal is present in the explosive composition in the range from about 10% to about 45%, by weight.
Claim 13
Dependent Claim
32 words
An insensitive high performance explosive composition as defined in claim 1, wherein the reactive metal is present in the explosive composition in the range from about 15% to about 25%, by weight.
Claim 14
Dependent Claim
29 words
An insensitive high performance explosive composition as defined in claim 1, wherein the reactive metal has a particle size in the range from 5 μm to about 50 μm.
Claim 15
Dependent Claim
29 words
An insensitive high performance explosive composition as defined in claim 1, wherein the reactive metal has a particle size in the range from 15 μm to about 20 μm.
Claim 16
Dependent Claim
31 words
An insensitive high performance explosive composition as defined in claim 1, wherein the RDX is present in the explosive composition in the range from about 10% to about 40%, by weight.
Claim 17
Dependent Claim
29 words
An insensitive high performance explosive composition as defined in claim 1, wherein the RDX is present in the explosive composition in the range from about 10% to about 20%.
Claim 18
Dependent Claim
26 words
An insensitive high performance explosive composition as defined in claim 1, wherein the eutectic melt represents from about 20% to about 50% of the explosive composition.
Claim 19
Dependent Claim
28 words
An insensitive high performance explosive composition as defined in claim 1, wherein the RDX particle size is in the range from about 1 μm to about 4 μm.
Claim 20
Dependent Claim
128 words
An insensitive high performance explosive composition comprising: a eutectic melt comprising dicyandiamide (DCDA), ammonium nitrate (AN), guanidine nitrate (GN), ethylene diamine dinitrate (EDDN), wherein the DCDA, AN, GN, and EDDN forming the eutectic melt are present in the following weight ratio: 20% to 25% DCDA, 35% to 40% AN, 10% to 15% GN, and 25% to 30% EDDN, and wherein the eutectic melt represents from about 20% to about 50% of the explosive composition; 1,3,5-trinitro-1,3,5-triaza-cyclohexane (RDX) having a particle size in the range from about 1 μm to about 10 μm; ammonium perchlorate (AP) present in the explosive composition in the range from about 10% to about 60%, by weight; and aluminum present in the explosive composition in the range from about 10% to about 45%, by weight.
Claim 21
Dependent Claim
128 words
An insensitive high performance explosive composition comprising: a eutectic melt comprising dicyandiamide (DCDA), ammonium nitrate (AN), guanidine nitrate (GN), ethylene diamine dinitrate (EDDN), wherein the DCDA, AN, GN, and EDDN forming the eutectic melt are present in the following weight ratio: 20% to 25% DCDA, 35% to 40% AN, 10% to 15% GN, and 25% to 30% EDDN, and wherein the eutectic melt represents from about 20% to about 50% of the explosive composition; 1,3,5-trinitro-1,3,5-triaza-cyclohexane (RDX) having a particle size in the range from about 1 μm to about 10 μm; ammonium perchlorate (AP) present in the explosive composition in the range from about 10% to about 60%, by weight; and aluminum present in the explosive composition in the range from about 10% to about 45%, by weight.
Claim 22
Dependent Claim
28 words
An insensitive high performance explosive composition as defined in claim 19, wherein the RDX particle size is in the range from about 1 μm to about 4 μm.
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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) | 1998-05-01 | 1998-10-31 | 1999-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-01 | 2002-10-31 | 2003-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-01 | 2006-10-31 | 2007-05-02 | $7700.00 | Window Closed / Lapsed |