Pressable explosive composition

a technology of explosive composition and compression, which is applied in the direction of explosives, nitrated explosive compositions, weapons, etc., can solve the problems of aluminum and explosives not being mixed well, relatively expensive process, and much more economical process

Inactive Publication Date: 2006-03-23
DYNO NOBEL INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0015] It is therefore an object of the invention to provide a pressable hi explosive with alumi...

Problems solved by technology

Smaller charges can also be made from these compositions, but this is a relatively costly process and for smaller charges a pressing process is much more economical.
A disadvantage with such mechanical mixing is that the aluminum and explosive are not mixed well enough and after pressing the result is charges where the aluminum and the explosive are not homogenously dispersed.
Another disadvantage with this Comp-A3/aluminum composition is that it does not satisfy the requirements for use in low-sensitivity ammunition.
The process described by Jones et al. is economically disadvantageous compared with a standard water slurry process because it utilizes PF-5080 which is much more expensive than water.
It is also unrealistic to expect to recover 100%.
PF-5080 is also not environmentally attractive.
This process is further disadvantageous in that it requires the use of dry crystals of explosive.
This is disadvantageous from a safety perspective in that a much greater risk is associated with handling dry explosive crystals as opposed to moist.
Predrying of explosive crystals is economically disadvantageous since this requires both time energy and equipment.
This process has several disadvantages, among others requiring the use of an expensive kneading mac...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0030] In a 1.50 l reactor, 13.05 kg of HMX was washed in approximately 50 l water under stirring. The mixture was heated up to approximately 60° C. and 0.75 kilograms of passivated aluminum was added to this mixture. Thereafter an ethyl acetate solution of 0.3 kg HyTemp 4454 and 0.9 kg DOA was added in a thin stream. Thereafter the solution was further heated to 100° C. under distillation of the ethyl acetate-water azeotrope. The mixture was cooled and run through a filter where the product (approximately 1.5 kg) was filtered out.

[0031] The product is a granulate, and investigation in an optical microscope reveals that the aluminum and the explosive are homogenously disbursed in each granule. Composition analysis shows that the product contains 87.1% by weight HMX, 5.5% by weight DOA, 2.3% by weight HyTernp and 5.1% by weight aluminum.

example 2

[0032] The same procedure was used as described in example 1, but the amounts that are used were as follows: 12.3 kg HMX, 1.5 kg passivating aluminum, 0.3 kg HyTemp 4454 and 0.9 kg DOA.

[0033] The product is a granulate, and investigation in an optical microscope reveals that the aluminum and the explosive are homogenously disbursed in each granule. Composition analysis shows that the product contains 83.3% by weight HMX, 5.6% by weight DOA, 1.8% by weight HyTemp and 9.3% by weight aluminum.

example 3

[0034] The same procedure was used as described in example 1, but the amounts that are used were as follows: 10.06 kg HMX, 3.75 kg passivated aluminum, 0.3 kg HyTemp 4454 and 0.9 kg DOA.

[0035] The product is a granulate, and investigation in an optical microscope reveals that the aluminum and the explosive are homogenously disbursed in each granule. Composition analysis shows that the product contains 66.6% by weight HMX, 5.7% by weight DOA, 1.8% by weight HyTemp and 25.9% by weight aluminum.

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PUM

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Abstract

The present invention relates to low-sensitivity, pressable, aluminum-containing explosive compositions and a method of producing them. The compositions comprise between 45 and 95% by weight explosive crystals, between 5 and 55% by weight passivated aluminum and a binder that is chosen such that the composition satisfies the requirements for low-sensitivity explosives (IM requirements). Due to the fact that the aluminum is passivated, the composition can be produced by the use of a well-known water slurry process.

Description

[0001] The following invention relates to pressable aluminum-containing explosive compositions. More particularly, the invention relates to low-sensitivity, pressable aluminum-containing explosive compositions and a method for producing them. [0002] 1. Background [0003] In recent times, there has been an increased interest in aluminum-containing explosive compositions due to the fact that these provide an explosive having increased explosive pressure (so-called “enhanced blast explosives” or otherwise known as “thermobaric explosives”). The reason for this increased interest is that there is a greater need for charges that can be effectively used against bunkers and tunnels. For this purpose, an explosive is needed that can release energy over a longer period than is achieved by traditional compositions having pure high explosives. The use of aluminum to increase the effect in an explosive has long been known, and was first patented already in 1900 by G. Roth (DE 172,327). [0004] Th...

Claims

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Application Information

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IPC IPC(8): C06B25/34C06B33/00C06B33/08C06B45/22C06B45/32
CPCC06B45/32C06B33/08
Inventor SMITH, KJELL-TORE
Owner DYNO NOBEL INC
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