A method for preparing 3,5-dinitropyrazole, includes obtaining N-acetyl-3-nitropyrazole from pyrazole, and a sigmatropic rearrangement of the compound obtained.
A method for synthesising polyepichlorohydrin includes: a) reacting epichlorohydrin with boron trifluoroetherate in the presence of a solvent; b) adding epichlorohydrin to the reaction product obtained in step a); c) hydrolysing the product obtained in step b).
The present invention relates to a sequential one-pot synthesis of TKX-50, suitable for larger-scale production, during which an acetyl halide is used during the cyclization of diazidoglyoxime so as to obtain 1,1′-diacetyl-5,5′-bistetrazole, which is then hydrolyzed to 5,5′-bistetrazole-1,1′-diolate, to which compound a hydroxylammonium salt is subsequently added.
C07D 403/04 - Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group containing two hetero rings directly linked by a ring-member-to-ring- member bond
4.
METHOD FOR OBTAINING FIRING PASTES IN AN ACOUSTIC RESONANCE MIXER.
The present invention relates to a method for obtaining a firing paste which comprises mixing the different ingredients constituting said paste in an acoustic resonance mixer. The invention also relates to a method for obtaining an ignition charge which comprises the deposit of the firing paste obtained according to the above method on a combustible support, and the drying of the combustible support.
The present invention relates to a method for preparing 3,5-dinitropyrazole, comprising a step involving obtaining N-acetyl-3-nitropyrazole from pyrazole, and a step involving the sigmatropic rearrangement of the compound obtained.
The invention relates to a process for synthesizing bis(2-nitratoethyl)dinitroxamide which comprises reacting bis-hydroxyethyloxamide with nitric acid in the presence of an oleum solution. The invention also relates to a process for preparing an energetic composition from the thus synthesized bis(2-nitratoethyl)dinitroxamide.
An igniter tube consisting of a combustible tube, on the inner face of which an ignition charge is deposited along the length of said combustible tube. The invention also relates to a method for producing the igniter tube.
C06B 21/00 - Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
C06B 25/18 - Compositions containing a nitrated organic compound the compound being nitrocellulose present as 10% or more by weight of the total composition
C06B 31/04 - Compositions containing an inorganic nitrogen-oxygen salt the salt being an alkali metal or an alkaline earth metal nitrate with carbon or sulfur
C06B 45/10 - Compositions or products which are defined by structure or arrangement of component or product comprising solid particles dispersed in solid solution or matrix the solid solution or matrix containing an organic component the organic component containing a resin
C06B 45/28 - Compositions or products which are defined by structure or arrangement of component or product comprising a coated component the component base containing an organic explosive or an organic thermic component the component base containing nitrocellulose and nitroglycerine
The invention relates to a method for synthesising polyepichlorohydrin, comprising: a) reacting epichlorohydrin with boron trifluoride etherate in the presence of a solvent; b) adding epichlorohydrin to the reaction product obtained in step a); c) hydrolysing the reaction product obtained in step b).
The invention relates to a method for synthesising polyepichlorohydrin, comprising: a) reacting epichlorohydrin with boron trifluoride etherate in the presence of a polymerisation initiator; b) adding a good solvent for epichlorohydrin to the reaction product obtained in step a); c) adding epichlorohydrin to the reaction product obtained in step b).
A device for depositing paste patterns on the surface of the channel of a tube, the device comprising a frame supporting a first mechanical assembly for holding, positioning and moving the tube, and a second mechanical assembly for extruding paste for depositing said paste patterns, the assemblies cooperating with one another.
B05D 1/00 - Processes for applying liquids or other fluent materials
B05D 1/26 - Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
B05D 7/22 - Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes
The invention relates to a method for obtaining a nitrocellulose structure, comprising the layer-by-layer deposition, by means of additive manufacturing, of a collodion on an adhesion support, wherein the structure being manufactured is impregnated with a nitrocellulose-setting liquid. The invention also relates to a device for implementing the method.
B29C 64/124 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
The present invention relates to a sequential one-pot synthesis of TKX-50, suitable for larger-scale production, during which an acetyl halide is used during the cyclization of diazidoglyoxime so as to obtain 1,1'-diacetyl-5,5'-bistetrazole, which is then hydrolysed to 5,5'-bistetrazole-1,1'-diolate, to which compound a hydroxylammonium salt is subsequently added.
C07D 403/04 - Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group containing two hetero rings directly linked by a ring-member-to-ring- member bond
The invention relates to a method for manufacturing a housing enclosing a pyrotechnic load and a facility for implementing said method. The method comprises at least: - inserting a pyrotechnic load into a loading space (V) defined laterally by a rigid cylindrical loading wall (32) and in a lower portion by a first element (10) of the housing to be obtained; - positioning a second cylindrical housing element (50) to be obtained above the inserted pyrotechnic load and in the extension of the cylindrical loading wall, the second element having a cylindrical side wall with the same shape and diameter as the cylindrical loading wall and being capable of engaging with the first element; and - concurrently translating (T1) the second element and the cylindrical loading wall relative to the first element so as to cause the second element to engage with the first element and form the housing enclosing the pyrotechnic load.
The invention relates to an igniter tube consisting of a fuel tube, on the inner face of which an ignition charge is laid along the length of said fuel tube. The invention also relates to a method for producing the igniter tube.
C06B 25/18 - Compositions containing a nitrated organic compound the compound being nitrocellulose present as 10% or more by weight of the total composition
The invention relates to a device for laying paste patterns on the surface of the channel of a tube, the device comprising a frame supporting a first mechanical assembly A for holding, positioning and moving the tube, and a second mechanical assembly B for extruding paste for laying said paste patterns, wherein the assemblies A and B cooperate with one another.
B05D 7/22 - Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes
B05D 1/26 - Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
B05D 1/00 - Processes for applying liquids or other fluent materials
The invention relates to an ammunition having reduced sensitivity (100), which comprises an explosive charge (120). The explosive charge has a blind cylindrical bore (130) for receiving at least one primer-ignition device. The ammunition further comprises a stiffening element (140) which is in contact with the inner surface (130b) of the bore (130). The stiffening element is a solid cylinder having a volume corresponding to the volume of the bore.
The invention relates to an explosive assembly composed of an explosive charge (4) provided with charge initiation means and at least one electrochemical and/or electrostatic electric accumulator (1).
F42B 12/20 - Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type
20.
PROPELLANT POWDER GRAIN COMPRISING AT LEAST PARTIALLY OBTURATED CHANNELS
The invention relates to a powder grain comprising a plurality of channels opening or not, at least one channel being partially or completely obturated by at least one plug, said at least one plug being made of a material having a melting temperature greater than or equal to the maximum operational hot temperature of the powder grain.
The invention relates to an ignition charge consisting of a cellulose ester-based support film having, on one of its faces, an ignition charge distributed discontinuously in solid geometric volumetric patterns across multiple areas of the film, said ignition charge comprising at least an ignition powder and a cellulose ester. The invention also relates to a method for obtaining said ignition charge and to the use thereof in an igniter tube for ammunition.
The invention relates to a method for producing ammonium dinitramide (ADN) crystals, comprising: the addition of an ADN solution (S) in a polar solvent (S1) to a non-polar solvent (S2) that cannot dissolve ADN and is miscible with the polar solvent (S1), in a maximum quantity corresponding to a mass ratio of the polar solvent (S1)/(polar solvent (S1) + non-polar solvent (S2)) of 25%, in order to form an ephemeral emulsion of droplets of said ADN solution (S) in said non-polar solvent (S2), said droplets transforming into the desired ADN crystals by means of the inter-diffusion of the miscible polar and non-polar solvents (S1 and S2); the recovery of said crystals; and generally, the drying of the recovered crystals.
C01B 21/087 - Compounds containing nitrogen and non-metals containing one or more hydrogen atoms
B01J 2/02 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
C06B 21/00 - Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
C06B 31/00 - Compositions containing an inorganic nitrogen-oxygen salt
24.
ETHYL CELLULOSE FILMS, PREPARATION OF SAME AND DOUBLE-BASE PROPELLANT BLOCKS COMBUSTION-INHIBITED WITH SUCH FILMS
The present invention mainly concerns: ethyl cellulose films, the composition of which, expressed as percentages by weight, contains: - 75% to 95% ethyl cellulose, - 4% to 20% of at least one plasticiser, - 0.5% to 5% of at least one compound chosen from: + 2-nitrodiphenylamine, + 1,3-diethyl-1,3-diphenyl urea, + 1,3-dimethyl-1,3-diphenyl urea, and + 1-methyl-3-ethyl-1,3-diphenyl urea, and - optionally, up to 5% of at least one additive; a method for preparing such films; and double-base propellant blocks, part of the surface of which is combustion-inhibited by such films.
A method for obtaining the explosive charge in dry granular form as well as a device suitable for implementing the method. The method includes: filtering the suspension, by passing same through a static filter in order to obtain a cake containing the granular explosive charge agglomerated by residual liquid; dewatering the cake by subjecting the cake to pressurized gas; splitting the dewatered cake and obtaining a fluidized bed of the desired explosive charge by exposing the dewatered cake to at least one stream of gas; at least one stream of gas being injected, under the dewatered cake to impinge said dewatered cake, according to two consecutive modes and the gas having a humidity height below that of the dewatered cake and a dew point temperature higher than the injection temperature thereof; and stopping at least one stream of gas and recovering the explosive charge in dry, granular form.
C06B 25/34 - Compositions containing a nitrated organic compound the compound being a nitrated acyclic, alicyclic or heterocyclic amine
C06B 21/00 - Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
D03D 23/00 - General weaving methods not special to the production of any particular woven fabric or the use of any particular loomWeaves not provided for in any other single group
26.
THIN COMPOSITE EXPLOSIVE PRODUCTS AND PREPARATION THEREOF
The present invention relates to composite explosive products and the preparation thereof. Said products have: - a composition, expressed in weight percentages, which contains: from more than 85 to 92%, advantageously from 88 to 90%, of organic energetic charges; said organic energetic charges a) being selected from octogen (HMX), hexogen (RDX), hexanitrohexaazaisowurtzitane (CL20) and penthrite (PETN) charges and mixtures thereof and b) having a particle size distribution with a D90 value of less than 15 µm and a D50 value of less than or equal to 5 pm; and from more than 7 to 12%, advantageously from 8 to 10%, of a polymeric rubber selected from polyurethane-polyester rubbers, polyurethane-polyether rubbers and mixtures thereof, the number-average molecular weight of which is greater than 20 000 g/mol and the Mooney viscosity of which is between 20 and 70 ML (5 + 4) at 100°C; and - a thickness of from 0.4 to 5 mm, advantageously from 1 to 2 mm. Said products may in particular consist of miniaturized systems for multipoint initiation of explosive charges.
C06B 21/00 - Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
C06B 45/12 - Compositions or products which are defined by structure or arrangement of component or product having contiguous layers or zones
C06B 45/10 - Compositions or products which are defined by structure or arrangement of component or product comprising solid particles dispersed in solid solution or matrix the solid solution or matrix containing an organic component the organic component containing a resin
A munition (10) with variable explosive power comprises a body (12) extending in an axial direction and housing at least first and second explosive charges (31, 32), together with a firing device (16). According to the invention, the munition further comprises a selector (50, 50′) provided with a detonating portion (52) and adapted to move between at least first and second positions, the selector being configured so that its detonating portion couples the firing device (16) to the first explosive charge in said first position and to the second explosive charge in said second position, one of the first and second explosive charges (31, 32) not being coupled to the firing device (16) in at least one of the first and second positions.
F42C 14/06 - Fuzes characterised by the ammunition class or type for fall bombs
F42B 12/20 - Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type
The present invention relates to a method for obtaining, from a suspension (S) of a granular explosive charge (C) in a liquid (L), said explosive charge (C) in dry granular form as well as a device suitable for implementing said method. Said method comprises: a) filtering said suspension (S), by passing same through a static filter (1) in order to obtain, on said filter (1), a cake (2) containing said granular explosive charge (C) agglomerated by residual liquid; b) dewatering said cake (2) by subjecting said cake (2) to pressurized gas (G); c) splitting the dewatered cake (20) and obtaining a fluidized bed (5) of the desired explosive charge (C), in dry granular form, by exposing said dewatered cake (20) to at least one stream (4) of gas (G'); said at least one stream (4) of gas (G) being injected, under said dewatered cake (20) to impinge said dewatered cake (2'), according to two consecutive modes and said gas (G') having a humidity level below that of the dewatered cake (20) and a dew point temperature higher than the injection temperature thereof; and d) stopping at least one stream (4) of gas (G) and recovering said explosive charge (C) in dry, granular form.
C06B 21/00 - Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
B01D 29/01 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor with flat filtering elements
29.
COMPOSITE PYROTECHNICAL PRODUCT WITH NON-CROSSLINKED BINDER AND METHOD FOR PREPARING SAME
The present invention relates to composite pyrotechnical products, in particular to propellant powders for barrelled weapons, in which the composition, expressed in weight percentages, includes: 78 % to 90 %, advantageously 80 % to 86 %, of organic energy loads; and 10 % to 22 % of a polymer gum, selected among the polyurethane-polyester gums, the polyurethane-polyether gums and the mixtures thereof, in which the average molecular weight by number is higher than 20,000 g/mol and in which the Mooney viscosity is from 20 to 70 ML (5 + 4) at 100 °C. The invention also relates to the method for obtaining said products. Said products are particularly useful given the properties thereof and how easily they can be obtained.
C06B 45/10 - Compositions or products which are defined by structure or arrangement of component or product comprising solid particles dispersed in solid solution or matrix the solid solution or matrix containing an organic component the organic component containing a resin
C06B 21/00 - Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
30.
COMPOSITE PYROTECHNICAL PRODUCT WITH CROSSLINKED BINDER AND METHOD FOR PREPARING SAME
The present invention relates to a composite pyrotechnical product, in particular a propellant powder for barrelled weapons, containing organic energy loads in a crosslinked binder. The composition of said product, expressed in weight percentages, typically includes: 78 % to 90 %, advantageously 80 % to 86 %, of organic energy loads; and 10 % to 22 % of an energetic crosslinked binder obtained by crosslinking, via only 8 % to 12 % of the azide functions thereof, a glycidyl polyazide having an average molecular weight of 700 to 3,000 g/mol, with at least one crosslinking agent containing at least two propargyl functions in the chemical formula thereof, in the presence of a polymer gum, selected among the polyurethane-polyester gums, the polyurethane-polyether gums and the mixtures thereof, in which the average molecular weight by number is higher than 20,000 g/mol and in which the Mooney viscosity is from 20 to 70 ML (5 + 4) at 100 °C; said at least one polymer gum making up 1 wt % to 5 wt % of the composition of said pyrotechnical product. The invention also relates to the method for obtaining said products. Said products are particularly useful given the properties thereof and how easily they can be obtained.
C06B 21/00 - Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
C06B 45/10 - Compositions or products which are defined by structure or arrangement of component or product comprising solid particles dispersed in solid solution or matrix the solid solution or matrix containing an organic component the organic component containing a resin
31.
Munition, charge for such a munition, and method of manufacturing such a munition
The invention provides a filler material for a munition, inluding an explosive charge, an inert charge and at least one pyrotechnic transmission unit adapted to transmit a remotely initiated detonation to said explosive charge. The invention also concerns a munition incorporating said filler material, said munition including a hollow elongate casing suitable for housing the explosive charge and the inert charge, and a firing device, at least a portion of the inert charge being interposed between the firing device and said explosive charge, and the pyrotechnic transmission unit being provided with a pyrotechnic extension and coupling the firing device to the explosive charge in order to prime detonation of the explosive charge under the action of the firing device.
F42B 12/20 - Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type
The present invention relates to a method for obtaining solutions that contain 1,2,4-triazole-5-one (3) (OTA) in concentrated sulphuric acid, said method using 3-amino-1,2,4-triazole (1) (ATA) as a precursor of OTA (3); to said solutions and to a method for preparing 3-nitro-1,2,4-triazole-5-one (4) (ONTA) from said solutions.
A munition (10) with modifiable explosive capability comprises a body (12) extending in an axial direction and housing at least a first and a second explosive charge (31, 32) and an ignition device (16). According to the invention, it also comprises a selection switch (50, 500) equipped with a detonating part (52) and able to move between at least a first and a second position, the selection switch being configured so that the detonating part thereof couples the ignition device (16) to the first explosive charge in said first position and to the second explosive charge in said second position, of the first and second explosive charges (31, 32) one of them not being coupled to the ignition device (16) in at least one out of the first and second positions.
F42B 12/20 - Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type
34.
SOLID EXPLOSIVE WITH A GEOPOLYMERIC MINERAL BINDER
The present invention concerns a solid explosive, containing a solid explosive energy charge in a novel type of binder. Said binder is a geopolymeric mineral binder cured by polycondensation. The present invention also concerns a method for obtaining said solid explosive and implementing same in a simple manner that consumes little energy. Said solid explosive is particularly suitable for high temperature deep drilling.
C06B 21/00 - Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
C06B 45/04 - Compositions or products which are defined by structure or arrangement of component or product comprising solid particles dispersed in solid solution or matrix
35.
FAKE EXPLOSIVE SIMULATING A MALLEABLE EXPLOSIVE AND ITS MANUFACTURING PROCESS
The subject of the present invention is a fake explosive simulating a solid malleable explosive and its manufacturing process. Said fake explosive consists of a malleable solid and at least 95% by weight of its composition contains: a solid non-pyrotechnic pulverulent filler, a liquid, and fibres.
The invention relates to a charge for a munition (10), comprising an explosive charge (40), an inert charge (50) and at least one pyrotechnique transmission unit (60) designed to transmit a remote-initiated detonation to said explosive charge (40). The invention also relates to a munition incorporating such a charge, said munition (10) comprising an elongate hollow body (12) able to house the explosive charge (40) and the inert charge (50), and a firing device (20), at least part of the inert charge (50) being interposed between the firing device (20) and said explosive charge (40), and the pyrotechnic transmission unit (60) being provided with a pyrotechnic extension (64) and coupling the firing device (20) to the explosive charge (40) in such a way as to allow the explosive charge to be primed to detonate under the action of the firing device (20).
The present invention relates to a process for obtaining a charge of hexanitrohexaazaisowurtzitane crystals having a rounded morphology. It also relates to said charge, the energetic material containing same and a process for manufacturing said material. Said process for obtaining said charge comprises: - the preparation of a saturated solution of hexanitrohexaazaisowurtzitane of any polymorphic from in a mixture comprising, on the one hand, an organic solvent for said hexanitrohexaazaisowurtzitane and, on the other hand, an organic nonsolvent for said hexanitrohexaazaisowurtzitane; said solvent being more volatile than said nonsolvent, - the seeding of this saturated solution with a few crystals of hexanitrohexaazaisowurtzitane, then - the concentrating of the seeded saturated solution by at least partial evaporation of the solvent; said evaporation of the solvent being carried out at a temperature between 35°C and 15°C and at a pressure adjusted, to plus or minus 12 mbar, to the boiling pressure of the solvent in said solution, throughout the process of evaporating said solvent from said solution.
C07D 487/22 - Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups in which the condensed system contains four or more hetero rings
C30B 29/60 - Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape characterised by shape
C06B 25/34 - Compositions containing a nitrated organic compound the compound being a nitrated acyclic, alicyclic or heterocyclic amine
38.
MALLEABLE SOLID EXPLOSIVE AND METHOD FOR OBTAINING IT
One subject of the present invention is a malleable solid explosive in the form of a solid block consisting, for at least 98% of its mass, of a powdered explosive charge and a liquid chosen from polyol polymers from the group of polyol polyisobutylenes, polyol polybutadienes, polyol polyethers, polyol polyesters and polyol polysiloxanes, the number-average molecular weight of which is between 500 and 10 000, and blends thereof. Another subject of the invention is a method for obtaining such an explosive.
The invention relates to suspensions of hexanitrohexaazaisowurtzitane crystals in a liquid phase (whereby the liquid phase comprises at least 85 wt.-% of a non-solvent of hexanitrohexaazaisowurtzitane, said non-solvent consisting of at last one non-flammable hydrofluoroether, and contains between 0 and less than 15 wt.-% of an organic solvent of hexanitrohexaazaisowurtzitane which is more volatile than the non-sovent and selected from the group containing esters, nitriles, ketones and mixtures thereof). The invention also relates to the production of said suspensions and to the use thereof for the production of pyrotechnic objects. The use of at least one hydrofluoroether as a non-solvent is particularly suitable.
C06B 21/00 - Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
C06B 25/34 - Compositions containing a nitrated organic compound the compound being a nitrated acyclic, alicyclic or heterocyclic amine
C07D 487/22 - Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups in which the condensed system contains four or more hetero rings
40.
Semi-continuous two-component method for obtaining a composite explosive charge with polyurethane matrix
in that the continuous mixing of the said components A′ and B′ is carried out in such a way that the weight ratio between component A′/component B′ is constant, being between 95.05/4.95 and 99.55/0.45.
The said method constitutes a particularly interesting improvement of the method according to EP-A-1 133 015.
D03D 23/00 - General weaving methods not special to the production of any particular woven fabric or the use of any particular loomWeaves not provided for in any other single group
The present invention relates to explosive compositions containing an explosive energy charge and a metal particulate charge, said metal particulate charge containing sintered tungsten carbide with a metal binder and/or sintered tungsten with a metal binder, and to explosive charges and ammunition containing such explosive compositions.
C06B 33/08 - Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide with a nitrated organic compound
C06B 23/00 - Compositions characterised by non-explosive or non-thermic constituents
The present invention relates to a cutting detonating cord (10), consisting of a dense explosive charge (C) containing an explosive energy charge as well as a dense metal particulate charge in a flexible polymer binder, and made in the shape of a bar (1), said bar (1) comprising a groove (2) arranged longitudinally and free of any metal coating.
C06B 45/10 - Compositions or products which are defined by structure or arrangement of component or product comprising solid particles dispersed in solid solution or matrix the solid solution or matrix containing an organic component the organic component containing a resin
48.
METHOD FOR DETERMINING THE SENSITIVE OR INSENSITIVE NATURE OF A HEXOGEN
The invention relates to a method for determining the sensitive or insensitive nature of a crystallised hexogen. The method comprises the following steps: formulation of the crystallised hexogen in a matrix; and analysis of a sample of the matrix loaded with the crystallised hexogen by means of differential scanning calorimetry, said matrix essentially comprising at least one liquid polymer suitable for the formulation of binders for energetic materials loaded with nitrated organic explosives and at least one volatile organic compound adsorption agent, said agent being stable at the temperature at which the analysis is performed and having low affinity for water. The invention also relates to the hexogen crystallised in one such matrix.
G01N 25/48 - Investigating or analysing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on solution, sorption, or a chemical reaction not involving combustion or catalytic oxidation
The invention concerns a semi-continuous dual-component method for obtaining a composite explosive charge consisting of a filled solid polyurethane matrix whereof the filler is powder-based and comprising at least one organic nitrated explosive. Said method includes the following successive steps: obtaining a pasty explosive composition essentially consisting of the following ingredients: a polyol prepolymer, a polyisocyanate monomer, a plasticizer, and a powder-based solid filler comprising at least one organic nitrated explosive, by mixing continuously a past component A' and a liquid component B', prepared, discretely, from said constituent ingredients; introducing into a mold said pasty explosive composition; and thermally crosslinking said composition in said mold. The invention is characterized in that said liquid component B' comprises 90 to 99 wt. % of said polyisocyanate monomer; said pasty component A' comprises the total polyol polymer, the total powder-based solid filler and the remaining 1 to 10 wt. % of the polyisocyanate monomer; the plasticizer being indifferently distributed between said components A' and B'; and in that the continuous mixture of said components A' and B' is performed such that the component A'/component B' mass ratio is constant, ranging between 95.05/4.95 and 99.5/0.45. Said method constitutes a particularly interesting improvement to the method according to patent EP-A-I 133015.
