Patent US3658607A successfully refreshed from Google Patents.
US3658607A
Expired / Lapsed
US
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High energy explosive compositions and method of preparation
Assignee: Ireco Inc
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Filing: 1969-04-25
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Granted: 1972-04-25
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Expires: 1989-04-25
Abstract
Abstract A dense explosive composition of extremely high energy and relatively high detonation velocity, with relatively long sustained application of high disruptive force, comprises a concentrated solution of ammonium nitrate, high proportions of finely divided aluminum, relatively small proportions of water, and a small amount of special combinations of cross-linking and thermally stable thickeners. The composition is prepared at elevated temperature, mixed very briefly, and delivered or packaged by pumping from mixer to receptacle where it sets up quickly. Density and sensitivity may be controlled by incorporating gas or porous inert filler material.
Inventors
- 👤 Melvin A Cook
- 👤 Lex L Udy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:39
CPC Classifications
C; C06; C06B; C06B47/00; C06B47/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
24 words
Composition according to claim 1 wherein the thickener comprises 0.1 to 0.5 percent of guar gum combined with a small amount of xanthan gum.
Claim 2
Dependent Claim
16 words
Composition according to claim 1 wherein the thickener comprises a major proportion of a xanthan gum.
Claim 3
Dependent Claim
31 words
Composition according to claim 1 wherein there is added an inert filler material in proportions of 0.2 and 1.5 percent by weight, based on the total composition, to reduce composition density.
Claim 4
Dependent Claim
17 words
Composition according to claim 4 wherein the inert filler material comprises particles of foamed polystyrene plastic solid.
Claim 5
Dependent Claim
16 words
Composition according to claim 5 containing 0.5 to 1 percent of foamed polystyrene plastic solid beads.
Claim 6
Dependent Claim
234 words
The process of preparing an explosive slurry blasting composition which comprises, in combination, the steps of: a. forming a saturated aqueous solution of powerful inorganic oxidizer of which a major proportion is ammonium nitrate; b. including at least a small amount of delayed action thickener in said solution prior to addition of insoluble ingredients thereto, and including in the total thickener ingredient a delayed action thickener material selected from the group which consists of pregelled starch and cross-linked guar gum and also a supplemental quantity of a xanthan bacteria modified gum, the total thickener constituting 0.1 to 2 percent by weight, based on the total composition and being sufficient to gel the whole composition to a stiff, rubbery consistency which is viscosity stable at high temperature; c. blending into the solution about 32 to 43 percent by weight, based on the total composition, of finely divided metallic aluminum, the final composition containing 13 to 16 percent of liquid of which at least the major part is water, d. also blending into said solution at least 10 percent of powerful oxidizer in addition to that in solution in the liquid, said additional oxidizer being primarily ammonium nitrate, to bring the total oxidizer content of the composition to 45 to 55 percent by weight, and e. stirring the composition to a smooth blend and discharging it to a receptacle before the thickening agent becomes fully effective.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |