EP0125166B1 - Cold-mouldable explosive composition and process for its preparation - Google Patents

Cold-mouldable explosive composition and process for its preparation Download PDF

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Publication number
EP0125166B1
EP0125166B1 EP84400839A EP84400839A EP0125166B1 EP 0125166 B1 EP0125166 B1 EP 0125166B1 EP 84400839 A EP84400839 A EP 84400839A EP 84400839 A EP84400839 A EP 84400839A EP 0125166 B1 EP0125166 B1 EP 0125166B1
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Prior art keywords
explosive
fluoro
suspension
powder
thermoplastic binder
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German (de)
French (fr)
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EP0125166A1 (en
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Hildebert Kerviel
Serge Poulard
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Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
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Commissariat a lEnergie Atomique CEA
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    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
    • C06B21/0033—Shaping the mixture
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B45/00—Compositions or products which are defined by structure or arrangement of component of product
    • C06B45/04—Compositions or products which are defined by structure or arrangement of component of product comprising solid particles dispersed in solid solution or matrix not used for explosives where the matrix consists essentially of nitrated carbohydrates or a low molecular organic explosive
    • C06B45/06—Compositions or products which are defined by structure or arrangement of component of product comprising solid particles dispersed in solid solution or matrix not used for explosives where the matrix consists essentially of nitrated carbohydrates or a low molecular organic explosive the solid solution or matrix containing an organic component
    • C06B45/10—Compositions or products which are defined by structure or arrangement of component of product comprising solid particles dispersed in solid solution or matrix not used for explosives where the matrix consists essentially of nitrated carbohydrates or a low molecular organic explosive the solid solution or matrix containing an organic component the organic component containing a resin

Definitions

  • the present invention relates to an explosive composition, cold moldable and its preparation process.
  • the explosive compositions consist of an explosive charge dispersed in a thermoplastic or thermosetting binder, and the usual practice for obtaining such compositions is to coat an explosive powder with the thermoplastic or thermosetting binder and then to consolidate the powder coated by compression.
  • thermoplastic binder such as those described in US Patents US-A 3,173,817 and 3,440,115, it is necessary to carry out the hot compression step.
  • thermosetting binders such as those described in French patents FR-A 2 268 770 (French Atomic Energy Commission), 2144988 (French State), 2 241 514 (Messerschmitt), 2 138 513 (French Police Atomic Energy) and 2,225,979 (French State), hot compression must also be carried out in most cases to obtain the desired characteristics.
  • thermosetting binders certain compositions of explosives coated in thermosetting binders can be cold pressed or extruded as described in European patent EP-A 003 6481 (Delsenroth).
  • a binder based on polyurethane is used and the coating operation is carried out using an aqueous dispersion of polyurethane.
  • the coated explosive powder thus obtained does not have satisfactory storage stability and must therefore be molded quickly.
  • thermosetting binders are not stable over time because they crosslink and polymerize slowly, and this is detrimental for then performing under good conditions the step of compressing the explosive powder coated with binder.
  • the present invention specifically relates to an explosive composition which, although it comprises a thermoplastic binder, has the advantage of being moldable at room temperature, and of being stable over time.
  • the chlorinated and / or fluorinated elastomers capable of being used as thermoplastic binder are polymers and copolymers of fluorinated hydrocarbons such as polytrifluorochloroethylene and copolymers of trifluorochloroethylene and vinylidene fluoride.
  • thermoplastic binder is a copolymer of trifluorochloroethylene and vinylidene fluoride, for example the product sold under the brand "Voltalef BP 5500".
  • the fluorinated plasticizers which can be used are low molecular weight polymers.
  • the fluorinated plasticizer is a trifluorochloroethylene polymer having a molecular weight of 500 to 1000, for example the oil sold under the brand "Voltalef S 10".
  • the plasticizer / binder weight ratio is approximately 1/3 to 1/1.
  • the explosive compositions of the invention prepared in the form of powder can comprise a high proportion of explosive (up to 98%), and be put under the desired shape by cold molding even after a relatively long storage period, for example up to more than 12 months.
  • the explosive compositions of the invention can be prepared by conventional methods. However, according to the invention, it is preferred, for safety reasons, prepare the explosive composition from a suspension in water of the explosive powder.
  • 60% of the explosive powder used as starting material in step b) has a particle size of 200 to 630 ⁇ m and 40% of the explosive powder used as starting material in step b) has a particle size at most equal to 100 Jlm.
  • the powders obtained by the process of the invention can then be put into the desired form by conventional techniques of pressure molding at room temperature, preferably using a pressure of 100 to 200 M Pa.
  • This example illustrates the preparation of an explosive composition
  • an elastomer constituted by a copolymer of trifluorochloroethylene and vinylidene fluoride (thermoplastic binder), ie the product sold under the brand "Voltalef 5500 BP” and a fluorinated plasticizer consisting of a trifluorochlorethylene polymer having a molecular weight of approximately 800, ie the product sold under the oil brand "Voltalef S 10".
  • a solution of the binder and the plasticizer is first prepared by dissolving at room temperature 750 g of Voltalef BP 5500 in 10 of ethyl acetate and then adding to the solution 250 g of Voltalef S 10 oil.
  • the whole is then cooled and filtered through a 5 ⁇ m fabric filter to recover the coated octogen.
  • the mix is then washed with stirring at 350 rpm. then it is wrung at 1000 rpm.
  • the powder obtained is then dried in a vacuum oven for 48 h at 50 ° C. A powder is thus obtained having an average particle size of 1 mm.
  • the coated powder is then used to prepare by conventional molding, carried out at 20 ° C by applying 3 pressure cycles of 150 MPa for 15 min, or else by isostatic molding carried out under the same conditions (3 cycles at 20 ° C, under 150 M Pa for 15 min) a billet 40 mm in diameter and 50 mm in height.
  • the density of the part obtained is 1.850 while it is 1.849 in the case of isostatic compression molding.
  • the theoretical density is 1.899.
  • Tests are also carried out to determine the detonic properties of the explosive thus obtained.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Molecular Biology (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
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Abstract

A cold moldable explosive composition comprises 85 to 98% by weight of at least one explosive chosen from among octogen, hexogen, pentrite, hexanitrostilbene and triaminotrinitrobenzene, 1.5 to 11% by weight of a thermoplastic binder constituted by a chlorinated and/or fluorinated elastomer, such as copolymer of trifluorochloroethylene and vinylidene fluoride and 0.5 to 4% of a fluorinated plasticizer constituted e.g. by a low molecular weight trifluorochloroethylene polymer.

Description

La présente invention a pour objet une composition explosive, moulable à froid et son procédé de préparation.The present invention relates to an explosive composition, cold moldable and its preparation process.

De façon plus précise, elle concerne des compositions explosives contenant un explosif puissant et un liant thermoplastique, qui se présentent sous la forme d'une poudre moulable à froid.More specifically, it relates to explosive compositions containing a strong explosive and a thermoplastic binder, which are in the form of a cold moldable powder.

Généralement, les compositions explosives sont constituées par une charge d'explosif dispersée dans un liant thermoplastique ou thermodurcissable, et la pratique habituelle pour obtenir de telles compositions est d'enrober une poudre d'explosif par le liant thermoplastique ou thermodurcissable et de consolider ensuite la poudre enrobée par compression.Generally, the explosive compositions consist of an explosive charge dispersed in a thermoplastic or thermosetting binder, and the usual practice for obtaining such compositions is to coat an explosive powder with the thermoplastic or thermosetting binder and then to consolidate the powder coated by compression.

Ainsi, comme il est décrit dans le brevet français FR-A- 1 469 198, on peut préparer une composition explosive constituée par une charge d'explosif dispersée dans un liant thermoplastique tel que du polytrifluorochloroéthylène par un procédé consistant:

  • - à dissoudre le liant thermoplastique dans un solvant non miscible à l'eau,
  • - à mettre l'explosif en suspension dans l'eau,
  • - à chauffer la suspension agitée jusqu'à une température supérieure à la température à laquelle distille l'hétéroazéotrope formé par le solvant qui dissout le liant et l'eau,
  • - à couler la solution de liant dans la suspension chauffée, ce qui provoque la distillation du solvant,
  • - à filtrer la suspension, et
  • - à sécher les granules obtenus
Thus, as described in French patent FR-A-1 469 198, an explosive composition can be prepared consisting of an explosive charge dispersed in a thermoplastic binder such as polytrifluorochloroethylene by a process consisting of:
  • - dissolving the thermoplastic binder in a water-immiscible solvent,
  • - to suspend the explosive in water,
  • heating the stirred suspension to a temperature above the temperature at which the heteroazeotrope formed by the solvent which dissolves the binder and water distills,
  • - pouring the binder solution into the heated suspension, which causes the distillation of the solvent,
  • - to filter the suspension, and
  • - to dry the granules obtained

Lorsqu'on utilise un liant thermoplastique, tel que ceux décrits dans les brevets américains US-A 3 173 817 et 3 440 115, il est nécessaire de réaliser l'étape de compression à chaud.When using a thermoplastic binder, such as those described in US Patents US-A 3,173,817 and 3,440,115, it is necessary to carry out the hot compression step.

Lorsqu'on utilise des liants thermodurcissables, tels que ceux décrits dans les brevets français FR-A 2 268 770 (Commissariat à l'Energie Atomique), 2144988 (Etat Français), 2 241 514 (Messerschmitt), 2 138 513 (Commissariat à l'E-nergie Atomique) et 2 225 979 (Etat Français), on doit également réaliser dans la plupart des cas la compression à chaud pour obtenir les caractéristiques souhaitées.When thermosetting binders are used, such as those described in French patents FR-A 2 268 770 (French Atomic Energy Commission), 2144988 (French State), 2 241 514 (Messerschmitt), 2 138 513 (French Police Atomic Energy) and 2,225,979 (French State), hot compression must also be carried out in most cases to obtain the desired characteristics.

La réalisation de cette étape de compression à chaud pose certains problèmes lorsqu'on veut mettre la composition explosive sous une forme particulière. En effet, il est nécessaire dans ce cas de préparer tout d'abord un bloc par compression à chaud et de réusiner ensuite le bloc obtenu. De ce fait, la mise en oeuvre d'une étape de compression à chaud est techniquement et économiquement très onéreuse.Carrying out this hot compression step poses certain problems when it is desired to put the explosive composition in a particular form. In fact, it is necessary in this case to first prepare a block by hot compression and then to remanufacture the block obtained. Therefore, the implementation of a hot compression step is technically and economically very expensive.

Toutefois, certaines compositions d'explosifs enrobés dans des liants thermodurcissables peuvent être comprimées à froid ou extrudées comme cela est décrit dans le brevet européen EP-A 003 6481 (Delsenroth). Dans ce cas, on utilise un liant à base de polyuréthane et on réalise l'opération d'enrobage en utilisant une dispersion aqueuse de polyuréthane. Cependant, la poudre d'explosif enrobé ainsi obtenue ne présente pas une stabilité satisfaisante au stockage et elle doit, de ce fait, être moulée rapidement. En effet, les liants thermodurcissables ne sont pas stables dans le temps car ils se réticulent et se polymérisent lentement, et ceci est néfaste pour réaliser ensuite dans de bonnes conditions l'étape de compression de la poudre d'explosif enrobé de liant. La présente invention a précisément pour objet une composition explosive qui, bien qu'elle comprenne un liant thermoplastique, présente l'avantage d'être moulable à la température ambiante, et d'être stable dans le temps.However, certain compositions of explosives coated in thermosetting binders can be cold pressed or extruded as described in European patent EP-A 003 6481 (Delsenroth). In this case, a binder based on polyurethane is used and the coating operation is carried out using an aqueous dispersion of polyurethane. However, the coated explosive powder thus obtained does not have satisfactory storage stability and must therefore be molded quickly. In fact, thermosetting binders are not stable over time because they crosslink and polymerize slowly, and this is detrimental for then performing under good conditions the step of compressing the explosive powder coated with binder. The present invention specifically relates to an explosive composition which, although it comprises a thermoplastic binder, has the advantage of being moldable at room temperature, and of being stable over time.

La composition explosive, selon l'invention, se caractérise en ce qu'elle comprend:

  • - de 85 à 98% en poids d'au moins un explosif choisi dans le groupe comprenant la cyclotétra- méthylènetétranitramine (octogène), la cyclotri- méthylènetrinitramine (hexogène), le triaminotri- nitrobenzène (TATB), le tétranitrate de pen- taérythrite (pentrite) et l'hexanitrostilbène (HNS),
  • - de 1,5 à 11 % en poids d'un liant thermoplastique constitué par un élastomère chloré et/ou fluoré, et
  • - de 0,5 à 4% d'un plastifiant fluoré.
The explosive composition according to the invention is characterized in that it comprises:
  • - from 85 to 98% by weight of at least one explosive chosen from the group comprising cyclotetramethylenetetranitramine (octogen), cyclotri-methylenetrinitramine (hexogen), triaminotri-nitrobenzene (TATB), penetherythrite tetranitrate ( pentrite) and hexanitrostilbene (HNS),
  • 1.5 to 11% by weight of a thermoplastic binder consisting of a chlorinated and / or fluorinated elastomer, and
  • - from 0.5 to 4% of a fluorinated plasticizer.

Selon l'invention, les élastomères chlorés et/ou fluorés susceptibles d'être utilisés comme liant thermoplastique sont des polymères et copolymères d'hydrocarbures fluorés tels que le polytrifluorochloroéthylène et les copolymères de trifluorochloroéthylène et de fluorure de vinylidène.According to the invention, the chlorinated and / or fluorinated elastomers capable of being used as thermoplastic binder are polymers and copolymers of fluorinated hydrocarbons such as polytrifluorochloroethylene and copolymers of trifluorochloroethylene and vinylidene fluoride.

De préférence, le liant thermoplastique est un copolymère de trifluorochloroéthylène et de fluorure de vinylidène, par exemple le produit commercialisé sous la marque «Voltalef BP 5500».Preferably, the thermoplastic binder is a copolymer of trifluorochloroethylene and vinylidene fluoride, for example the product sold under the brand "Voltalef BP 5500".

Selon l'invention, les plastifiants fluorés susceptibles d'être utilisés sont des polymères à bas poids moléculaire.According to the invention, the fluorinated plasticizers which can be used are low molecular weight polymers.

De préférence, le plastifiant fluoré est un polymère de trifluorochloroéthylène ayant un poids moléculaire de 500 à 1000, par exemple l'huile commercialisée sous la marque «Voltalef S 10».Preferably, the fluorinated plasticizer is a trifluorochloroethylene polymer having a molecular weight of 500 to 1000, for example the oil sold under the brand "Voltalef S 10".

Avantageusement, dans la composition explosive de l'invention, le rapport pondéral plastifiant/ liant est d'environ 1 /3 à 1 /1.Advantageously, in the explosive composition of the invention, the plasticizer / binder weight ratio is approximately 1/3 to 1/1.

Selon un mode préféré de réalisation de l'invention, la composition explosive comprend:

  • - 96% d'octogène,
  • - 3% d'élastomère constitué par un copolymère de trifluorochloroéthylène et de fluorure de vinylidéne, et
  • - 1 % de polymère fluoré ayant un poids moléculaire de 500 à 1000.
According to a preferred embodiment of the invention, the explosive composition comprises:
  • - 96% octogen,
  • 3% of elastomer constituted by a copolymer of trifluorochloroethylene and vinylidene fluoride, and
  • - 1% of fluoropolymer having a molecular weight of 500 to 1000.

Grâce au choix du liant thermoplastique et à l'adjonction d'un plastifiant fluoré, les compositions explosives de l'invention préparées sous la forme de poudre peuvent comprendre une forte proportion d'explosif (jusqu'à 98%), et être mises sous la forme voulue par moulage à froid même après une période de stockage relativement longue, allant par exemple jusqu'à plus de 12 mois.Thanks to the choice of the thermoplastic binder and the addition of a fluorinated plasticizer, the explosive compositions of the invention prepared in the form of powder can comprise a high proportion of explosive (up to 98%), and be put under the desired shape by cold molding even after a relatively long storage period, for example up to more than 12 months.

Les compositions explosives de l'invention peuvent être préparées par des procédés classiques. Cependant, selon l'invention, on préfère, pour des raisons de sécurité, préparer la composition explosive à partir d'une suspension dans l'eau de la poudre d'explosif.The explosive compositions of the invention can be prepared by conventional methods. However, according to the invention, it is preferred, for safety reasons, prepare the explosive composition from a suspension in water of the explosive powder.

Aussi, l'invention a également pour objet un procédé de préparation d'une poudre d'explosif enrobé d'un liant thermoplastique, moulable à froid, caractérisé en ce qu'il consiste:

  • a) - à dissoudre dans un solvant organique non miscible à l'eau, un liant thermoplastique constitué par un élastomère chloré et/ou fluoré et un plastifiant fluoré,
  • b) - à mettre en suspension dans de l'eau une poudre d'au moins un explosif choisi dans le groupe comprenant l'octogène, l'hexogène, le tri- aminotrinitrobenzène, le tétranitrate de penta- érythrite et l'hexanitrostilbène,
  • c) - à chauffer la suspension à une température inférieure à 100 °C,
  • d) - à faire couler goutte à goutte dans la suspension ainsi chauffée la solution de liant et de plastifiant obtenue dans l'étape a),
  • e) - à évaporer le solvant organique,
  • f) - à filtrer la suspension, et
  • g) - à laver et essorer la poudre d'explosif enrobé ainsi séparée du liquide de la suspension, et
  • h) - à sécher sous vide ladite poudre d'explosif.
Also, the subject of the invention is also a process for the preparation of an explosive powder coated with a thermoplastic binder, cold moldable, characterized in that it consists:
  • a) - to dissolve in an organic solvent immiscible with water, a thermoplastic binder consisting of a chlorinated and / or fluorinated elastomer and a fluorinated plasticizer,
  • b) - suspending in water a powder of at least one explosive chosen from the group comprising octogen, hexogen, triaminotrinitrobenzene, pentaerythrite tetranitrate and hexanitrostilbene,
  • c) - heating the suspension to a temperature below 100 ° C,
  • d) - to trickle the binder and plasticizer solution obtained in step a) into the suspension thus heated,
  • e) - evaporating the organic solvent,
  • f) - filtering the suspension, and
  • g) - washing and wringing out the coated explosive powder thus separated from the suspension liquid, and
  • h) - drying said explosive powder under vacuum.

De préférence, selon l'invention, 60% de la poudre d'explosif utilisée comme produit de départ dans l'étape b) a une granulométrie de 200 à 630 µm et 40% de la poudre d'explosif utilisée comme produit de départ dans l'étape b) a une granulométrie au plus égale à 100 Jlm.Preferably, according to the invention, 60% of the explosive powder used as starting material in step b) has a particle size of 200 to 630 μm and 40% of the explosive powder used as starting material in step b) has a particle size at most equal to 100 Jlm.

Ceci permet en particulier d'obtenir lors de la compression de la poudre un tassement plus grand de l'explosif.This allows in particular to obtain during compression of the powder a greater compaction of the explosive.

Les poudres obtenues par le procédé de l'invention peuvent être mises ensuite sous la forme voulue par des techniques classiques de moulage sous pression à la température ambiante, en utilisant de préférence une pression de 100 à 200 M Pa.The powders obtained by the process of the invention can then be put into the desired form by conventional techniques of pressure molding at room temperature, preferably using a pressure of 100 to 200 M Pa.

D'autres caractéristiques et avantages de l'invention apparaîtront mieux à la lecture de l'exemple qui suit donné bien entendu à titre illustratif et non limitatif.Other characteristics and advantages of the invention will appear better on reading the example which follows, given of course by way of illustration and not limitation.

Cet exemple illustre la préparation d'une composition explosive comprenant de l'octogène, un élastomère constitué par un copolymère de trifluorochloroéthylène et de fluorure de vinylidène (liant thermoplastique), soit le produit vendu sous la marque «Voltalef 5500 BP» et un plastifiant fluoré constitué par un polymère de trifluorochloroéthylène ayant un poids moléculaire d'environ 800, soit le produit vendu sous la marque huile «Voltalef S 10».This example illustrates the preparation of an explosive composition comprising octogen, an elastomer constituted by a copolymer of trifluorochloroethylene and vinylidene fluoride (thermoplastic binder), ie the product sold under the brand "Voltalef 5500 BP" and a fluorinated plasticizer consisting of a trifluorochlorethylene polymer having a molecular weight of approximately 800, ie the product sold under the oil brand "Voltalef S 10".

On prépare tout d'abord une solution du liant et du plastifiant en dissolvant à la température ambiante 750 g de Voltalef BP 5500 dans 10 d'acétate d'éthyle et en ajoutant ensuite à la solution 250 g d'huile Voltalef S 10.A solution of the binder and the plasticizer is first prepared by dissolving at room temperature 750 g of Voltalef BP 5500 in 10 of ethyl acetate and then adding to the solution 250 g of Voltalef S 10 oil.

On introduit dans un réacteur 14,4 kg d'octogène ayant une granulométrie de 200 à 630 lim et 9,6 kg d'octogène ayant une granulométrie de 0 à 100 µm avec 100 d'eau, et on soumet l'ensemble à une agitation à 150 t/min. On chauffe ensuite le contenu du réacteur à 50 °C sous une pression réduite de 0,05 MPa et on fait alors couler goutte à goutte dans le réacteur la solution de liant et de plastifiant. On augmente ensuite progressivement la température du réacteur jusqu'à 90 °C pour éliminer complètement le solvant organique.14.4 kg of octogen having a particle size of 200 to 630 lim and 9.6 kg of octogen having a particle size of 0 to 100 μm with 100 of water are introduced into a reactor, and the whole is subjected to a stirring at 150 rpm. The contents of the reactor are then heated to 50 ° C under a reduced pressure of 0.05 MPa and the solution of binder and plasticizer is then poured dropwise into the reactor. The temperature of the reactor is then gradually increased to 90 ° C to completely remove the organic solvent.

On refroidit ensuite l'ensemble et on filtre sur un filtre en tissu de 5 µm pour récupérer l'octogène enrobé. On lave ensuite l'enrobé sous agitation à 350 t/min. puis on l'essore à 1000 t/min. On sèche ensuite la poudre obtenue dans une étuve sous vide pendant 48 h à 50 °C. On obtient ainsi une poudre ayant une granulométrie moyenne de 1 mm.The whole is then cooled and filtered through a 5 μm fabric filter to recover the coated octogen. The mix is then washed with stirring at 350 rpm. then it is wrung at 1000 rpm. The powder obtained is then dried in a vacuum oven for 48 h at 50 ° C. A powder is thus obtained having an average particle size of 1 mm.

On vérifie les caractéristiques de la poudre obtenue en la soumettant aux essais de sécurité habituels qui consistent à déterminer:

  • - le dégagement gazeux lors d'une épreuve d'essai sous vide pendant 70 h à une température de 120 °C;
  • - la température de déflagration de l'explosif enrobé; et
  • - la sensibilité au choc de la poudre.
The characteristics of the powder obtained are checked by subjecting it to the usual safety tests which consist in determining:
  • - gas evolution during a test test under vacuum for 70 h at a temperature of 120 ° C;
  • - the deflagration temperature of the coated explosive; and
  • - the sensitivity to shock of the powder.

Les résultats obtenus sont les suivants:

  • - dégagement gazeux lors de l'essai sous vide pendant 70 h à 120 °C: 8 ml/1 00 g,
  • - température de déflagration: 271 °C,
  • - sensibilité aux chocs HT - HO/HT = -0,30.
The results obtained are as follows:
  • - gas evolution during the vacuum test for 70 h at 120 ° C: 8 ml / 1 00 g,
  • - deflagration temperature: 271 ° C,
  • - sensitivity to shocks H T - H O / H T = -0.30.

On utilise ensuite la poudre enrobée pour préparer par moulage classique, réalisée à 20 °C en appliquant 3 cycles de pression de 150 MPa pendant 15 min, ou encore par moulage isostatique réalisé dans les mêmes conditions (3 cycles à 20 °C, sous 150 M Pa pendant 15 min) une billette de 40 mm de diamètre et de 50 mm de hauteur.The coated powder is then used to prepare by conventional molding, carried out at 20 ° C by applying 3 pressure cycles of 150 MPa for 15 min, or else by isostatic molding carried out under the same conditions (3 cycles at 20 ° C, under 150 M Pa for 15 min) a billet 40 mm in diameter and 50 mm in height.

Dans le premier cas, la densité de la pièce obtenue est de 1,850 alors qu'elle est de 1,849 dans le cas du moulage par compression isostatique. Ainsi, on obtient de très bons résultats dans les deux cas puisque la densité théorique est de 1,899.In the first case, the density of the part obtained is 1.850 while it is 1.849 in the case of isostatic compression molding. Thus, we obtain very good results in both cases since the theoretical density is 1.899.

On effectue également des essais pour déterminer les propriétés détoniques de l'explosif ainsi obtenu.Tests are also carried out to determine the detonic properties of the explosive thus obtained.

Les résultats sont les suivants:

  • - masse volumique: 1,849 g/cm3,
  • - vitesse de détonation: 8830 m/s, On constate ainsi que l'explosif de l'invention possède de bonnes caractéristiques détoniques.
The results are as follows:
  • - density: 1.849 g / cm 3 ,
  • - detonation speed: 8830 m / s, It can thus be seen that the explosive of the invention has good detonic characteristics.

Claims (7)

1. Explosive composition, comprising:
- from 85 to 98% by weight of at least one explosive chosen from the group comprising cyclo- tetramethylenetetranitramine (octogen), cyclotri- methylenetrinitramine (hexogen), triaminotrini- trobenzene (TATB), pentaerythritol tetranitrate (pentrite) and hexanitrostilbene (HNS), and
- from 1.5 to 11 % by weight of a thermoplastic binder consisting of a chloro and/or fluoro elastomer, characterized in that it additionally comprises from 0.5 to 4% of a fluoro plasticizer.
2. Composition according to Claim 1, characterized in that the thermoplastic binder is an elastomer consisting of a copolymer of trifluorochloroethylene and vinylidene fluoride.
3. Composition according to either of Claims 1 and 2, characterized in that the fluoro plasticizer is a trifluorochloroethylene polymer with a molecular weight of 500 to 1000.
4. Composition according to any one of Claims 1 to 3, characterized in that the weight ratio plas- ticizer/binder is approximately 1 /3 to 1 /1.
5. Explosive composition according to Claim 1, characterized in that it comprises:
- 96% of octogen,
- 3% of elastomer consisting of a copolymer of trifluorochloroethylene and vinylidene fluoride, and
- 1% of fluoro polymer with a molecular weight of 500 to 1000.
6. Process for the preparation of a powdered explosive coated with a thermoplastic binder, capable of being moulded cold, consisting:
a) - in dissolving, in a water-immiscible organic solvent, a thermoplastic binder consisting of a chloro and/or fluoro elastomer,
b) - in suspending in water a powder of at least one explosive chosen from the group comprising octogen, hexogen, triaminotrinitroben- zene, pentaerythritol tetranitrate and hexanitrostilbene,
c) - in heating the suspension to a temperature below 100 °C,
d) - in pouring dropwise the solution obtained in stage a) into the suspension heated in this manner,
e) - in evaporating off the organic solvent,
f) - in filtering the suspension, and
g) - in washing and filtering the coated explosive powder separated in this manner from the suspension liquid, and
h) - in drying the said explosive powder under vacuum, characterized in that in stage a) a fluoro plasticizer is also dissolved in the organic solvent.
7. Process according to Claim 6, characterized in that 60% of the explosive powder has a particle size of 200 to 630 11m and 40% has a particle size not exceeding 100 µm.
EP84400839A 1983-05-03 1984-04-25 Cold-mouldable explosive composition and process for its preparation Expired EP0125166B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84400839T ATE26253T1 (en) 1983-05-03 1984-04-25 COLD-FORMULABLE EXPLOSIVE COMPOSITION AND PROCESS OF PRODUCTION.

Applications Claiming Priority (2)

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FR8307347 1983-05-03
FR8307347A FR2545478B1 (en) 1983-05-03 1983-05-03 COLD-MOLDABLE EXPLOSIVE COMPOSITION AND PROCESS FOR PREPARING THE SAME

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EP0125166A1 EP0125166A1 (en) 1984-11-14
EP0125166B1 true EP0125166B1 (en) 1987-04-01

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EP (1) EP0125166B1 (en)
JP (1) JPS59207888A (en)
AT (1) ATE26253T1 (en)
CA (1) CA1215233A (en)
DE (1) DE3462878D1 (en)
FR (1) FR2545478B1 (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6310253B1 (en) * 1985-05-22 2001-10-30 The United States Of America As Represented By The Department Of Energy Preparation of 1,3,5-triamino-2,4,6-trinitrobenzene of submicron particle size
US5049213A (en) * 1985-10-10 1991-09-17 The United States Of America As Represented By The Secretary Of The Navy Plastic bonded explosives using fluorocarbon binders
DE3614173C1 (en) * 1986-04-26 1989-03-02 Dynamit Nobel Ag Granulated, stabilized alpha and beta octogen and process for the production of alpha octogen
CH673704A5 (en) * 1987-06-17 1990-03-30 Eidgenoess Munitionsfab Thun
FR2671549A1 (en) * 1991-01-16 1992-07-17 Commissariat Energie Atomique EXPLOSIVE COMPOSITION AND METHODS FOR PREPARING A POWDER AND A PART THEREOF
TR25832A (en) * 1992-02-10 1993-09-01 Commissariat Energie Atomique EXPLOSIVE COMPUTER AND THE METHOD OF PREPARING A POWDER AND PARTICLE FROM THIS COMPUTER
US5487851A (en) * 1993-12-20 1996-01-30 Thiokol Corporation Composite gun propellant processing technique
US6209457B1 (en) 1998-08-13 2001-04-03 Technology Commercialization Corp. Method and preformed composition for controlled localized heating of a base material using an exothermic reaction
GB9913262D0 (en) * 1999-06-09 2002-08-21 Royal Ordnance Plc Desensitation of energetic materials
FR2827376B1 (en) * 2001-07-13 2003-12-05 Poudres & Explosifs Ste Nale SAFETY IGNITER FOR PYROTECHNIC MUNITION ELEMENT LIKELY TO BE SUBJECTED TO SLOW HEATING
US6989064B2 (en) * 2002-09-13 2006-01-24 Schlumberger Technology Corp. Hi-temp explosive binder
US20060219341A1 (en) * 2005-03-30 2006-10-05 Johnston Harold E Heavy metal free, environmentally green percussion primer and ordnance and systems incorporating same
US8540828B2 (en) 2008-08-19 2013-09-24 Alliant Techsystems Inc. Nontoxic, noncorrosive phosphorus-based primer compositions and an ordnance element including the same
US7857921B2 (en) * 2006-03-02 2010-12-28 Alliant Techsystems Inc. Nontoxic, noncorrosive phosphorus-based primer compositions
US8641842B2 (en) 2011-08-31 2014-02-04 Alliant Techsystems Inc. Propellant compositions including stabilized red phosphorus, a method of forming same, and an ordnance element including the same
CA2942312C (en) 2007-02-09 2019-05-28 Vista Outdoor Operations Llc Non-toxic percussion primers and methods of preparing the same
US8192568B2 (en) 2007-02-09 2012-06-05 Alliant Techsystems Inc. Non-toxic percussion primers and methods of preparing the same
US8206522B2 (en) 2010-03-31 2012-06-26 Alliant Techsystems Inc. Non-toxic, heavy-metal free sensitized explosive percussion primers and methods of preparing the same
DE102012013961A1 (en) * 2012-07-13 2014-01-16 Diehl Bgt Defence Gmbh & Co. Kg Insensitive explosives active substance

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3181982A (en) * 1959-04-29 1965-05-04 Phillips Petroleum Co Gel propellants comprising halogencontaining terpolymers
US3296041A (en) * 1964-07-08 1967-01-03 Eastman Kodak Co Granulated crystalline plastic bonded explosives
FR1469198A (en) * 1965-12-31 1967-02-10 France Ministre Des Armees New process for coating explosives
FR2135534B1 (en) * 1971-05-06 1973-06-29 Wasagchemie Ag
US3985595A (en) * 1974-11-29 1976-10-12 The United States Of America As Represented By The United States Energy Research And Development Administration Insensitive explosive composition of halogenated copolymer and triaminotrinitrobenzene
US4120710A (en) * 1975-12-16 1978-10-17 The United States Of America As Represented By The United States Department Of Energy Nitroaliphatic difluoroformals
US4131499A (en) * 1976-09-07 1978-12-26 Thiokol Corporation Low smoke propellant

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Publication number Publication date
US4554031A (en) 1985-11-19
FR2545478B1 (en) 1985-07-05
FR2545478A1 (en) 1984-11-09
JPS59207888A (en) 1984-11-26
CA1215233A (en) 1986-12-16
DE3462878D1 (en) 1987-05-07
EP0125166A1 (en) 1984-11-14
ATE26253T1 (en) 1987-04-15

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