U.S. patent application number 10/170974 was filed with the patent office on 2003-01-09 for process for the production of a pressed insensitive explosive mixture.
This patent application is currently assigned to Diehl Munitionssysteme GmbH & Co. KG. Invention is credited to Hofmann, Heinz, Rudolf, Karl.
Application Number | 20030005990 10/170974 |
Document ID | / |
Family ID | 7690390 |
Filed Date | 2003-01-09 |
United States Patent
Application |
20030005990 |
Kind Code |
A1 |
Hofmann, Heinz ; et
al. |
January 9, 2003 |
Process for the production of a pressed insensitive explosive
mixture
Abstract
For the crack-free production of pressed explosive bodies, in
particular jet- and projectile-forming pressed explosive bodies the
insensitive explosive mixture has TATB deposited directly on the
secondary explosive. It may contain small proportions of binders,
for example DOA, calcium stearate or Aerosil.
Inventors: |
Hofmann, Heinz;
(Schnaittach, DE) ; Rudolf, Karl; (Schrobenhausen,
DE) |
Correspondence
Address: |
Leopold Presser
Scully, Scott, Murphy & Presser
400 Garden City Plaza
Garden City
NY
11530
US
|
Assignee: |
Diehl Munitionssysteme GmbH &
Co. KG
Rothenbach
DE
|
Family ID: |
7690390 |
Appl. No.: |
10/170974 |
Filed: |
June 13, 2002 |
Current U.S.
Class: |
149/109.6 |
Current CPC
Class: |
C06B 25/04 20130101;
C06B 21/0083 20130101; C06B 25/34 20130101 |
Class at
Publication: |
149/109.6 |
International
Class: |
D03D 023/00; D03D
043/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 3, 2001 |
DE |
101 32 122.8 |
Claims
1. A process for the production of a pressed insensitive explosive
mixture in which the binding agent comprises sonochemically
produced 1,3,5-triamino-2,4,6-trinitrobenzene (TATB), characterised
in that the TATB which is produced by ultrasound from TCTNB is
deposited in very fine particle form on the secondary explosive
crystals present in the bath.
2. A process according to claim 1 characterised in that the TATB
disposed in the mixer is dropped into a TCTNB solution.
3. A process according to claim 1 characterised in that the
explosive mixture containing TATB is sonochemically produced in the
presence of the secondary explosive directly from the preliminary
stage TCTNB.
4. A process according to claim 1 characterised in that there are
added to the explosive mixture small proportions of 0.1 to 3% of
binder additives such as DOA (plasticiser), calcium stearate, or
Aerosil, for controlling the properties of the pressed bodies.
Description
[0001] Process for the production of a pressed insensitive
explosive mixture The invention relates to a process for the
production of a pressed insensitive explosive mixture in accordance
with European patent application EP 1 101 751 A.
[0002] The invention is based on the object of also proposing
insensitive high-performance pressed bodies for jet-forming and
projectile-forming hollow charges.
[0003] That object is attained in accordance with the
characterising features of claim 1. Advantageous developments of
the invention are set forth in the appendant claim.
[0004] The process according to the invention provides crack-free
pressed bodies.
[0005] The sonochemical synthesis of TATB involves what is referred
to as a two-phase reaction, wherein a solution of TCTNB
(trichlorotriaminobenze- ne) in toluene is caused to react with
ammonia solution which is immiscible with that solution.
[0006] The activation energy required for that purpose is applied
in that case by a strong ultrasonic source which in addition also
provides for an extremely great increase in the phase interfaces at
which the chemical reaction takes place.
[0007] By virtue of the step of dropping a TCTNB solution into the
saturated ammonia solution, those TATB crystals are refined. That
provides for a higher degree of wetting in regard to the explosive
crystals. That step is a prerequisite for automatic production of
the explosive according to the invention.
[0008] The very fine TATB which is produced upon the reaction
taking place can be conveniently filtered off, washed and dried,
and can then serve for production of the above-mentioned explosive
mixtures.
[0009] In an alternative mode of production (direct process), the
procedure involved is now as follows.
[0010] Using ultrasound, a suspension of the respective secondary
explosive (in the moistened condition as delivered), that is to say
RDX, HMX or CL-20, Nitropenta . . . in excess, aqueous, about 30%
ammonia solution is produced, and an amount of TCTNB calculated in
accordance with the reaction conversion effect, dissolved in
toluene, is added by dropping.
[0011] The resulting very fine TATB is now deposited directly in
situ on the suspended secondary explosive particles.
[0012] It was further established by laser diffraction measurement
procedures that, by virtue of that dropping-in process, in
comparison with the conventional dropping-in process, it is
possible to achieve a further reduction in the mean particle
diameter of the TATB particles, which in turn still further
improves the adsorptive capability.
[0013] That adsorption procedure is also enormously promoted by the
formation of strong hydrogen bridge bonds between the nitro groups
of the secondary explosives and the amino groups of the TATB.
[0014] After conclusion of the reaction the procedure involves
filtering off, washing and drying under vacuum.
[0015] The product obtained can be passed directly for further
processing.
[0016] The insensitive explosive mixture has TATB deposited
directly on the secondary explosive, for the crack-free production
of pressed explosive bodies, in particular jet-forming and
projectile-forming pressed explosive bodies. They may contain small
proportions of binding agents, for example DOA, calcium stearate or
Aerosil.
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