EP0495714A1 - Explosive composition and process for making powder and a piece from this composition - Google Patents
Explosive composition and process for making powder and a piece from this composition Download PDFInfo
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- EP0495714A1 EP0495714A1 EP92400102A EP92400102A EP0495714A1 EP 0495714 A1 EP0495714 A1 EP 0495714A1 EP 92400102 A EP92400102 A EP 92400102A EP 92400102 A EP92400102 A EP 92400102A EP 0495714 A1 EP0495714 A1 EP 0495714A1
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- 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
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B25/00—Compositions containing a nitrated organic compound
- C06B25/04—Compositions containing a nitrated organic compound the nitrated compound being an aromatic
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B25/00—Compositions containing a nitrated organic compound
- C06B25/34—Compositions containing a nitrated organic compound the compound being a nitrated acyclic, alicyclic or heterocyclic amine
Definitions
- the present invention relates to a new explosive composition and its preparation methods.
- TATB triaminotrinitrobenzene
- HNS hexanitrostilbene
- thermoplastic binder of the polyether phenolic type associated with TATB and with a second explosive makes it possible to obtain explosive performances substantially equal to those of the second explosive, while having a high level of safety comparable to that of TATB as well as mechanical properties, in particular a tensile strength, equivalent to that of TATB alone and a dimensional stability greater than that of TATB alone.
- any type of phenolic polyether can be used as long as it has a glass transition temperature of 70 ° C. to 120 ° C. and a coefficient of expansion at most equal to 6.10 ° C. 1.
- a phenolic polyether derived from bis-phenol A preferably comprising hydroxyl groups such as poly-2,2 bis (p-oxy, p′-2-hydroxy-propoxy) phenyl) propane (PKHJ) of formula: where n is an integer from 82 to 123.
- the second explosive which is responsible for good explosive performance is a powerful explosive chosen from octogen, hexogen, pentrite and hexanitrostilbene. Octogen is preferably used.
- the explosive composition may also comprise 0.01 to 0.05% by weight of at least one dye soluble in the polymer and compatible with the explosives used.
- this composition can optionally comprise 0.01 to 0.03% by weight of dye.
- the explosive composition of the invention can be made into the desired form by conventional methods.
- thermoplastic binder Generally, explosive grains coated with the thermoplastic binder are first prepared, which is then agglomerated by hot pressing, taking advantage of the softening of the thermoplastic binder under the effect of heat. There is thus obtained, after molding and cooling, a blank which can be put to the desired dimensions by machining.
- the powder can then be molded hot and under pressure, for example at a temperature of 120 to 140 ° C., and under a pressure of 180 to 220 MPa to obtain a blank which is then optionally subjected to a heat treatment, generally to a temperature 10 ° C lower than the glass transition temperature of the binder, ie at a temperature of 60 to 110 ° C, for 24 to 72 hours, before proceeding to the final machining.
- a heat treatment generally to a temperature 10 ° C lower than the glass transition temperature of the binder, ie at a temperature of 60 to 110 ° C, for 24 to 72 hours, before proceeding to the final machining.
- the purpose of this heat treatment is to stabilize the swelling of the TATB in the blank obtained.
- the binder solution For the preparation of the binder solution, it is possible to use different organic solvents or a mixture of organic solvents with optionally water.
- PKHJ poly-2,2 bis (p-oxy, p′-hydroxy-2 propoxy) phenyl propane
- a solution of 1800 g of PKHJ in 25 liters of a mixture of methyl ethyl ketone and n-butyl acetate is prepared.
- the preceding binder solution is gradually introduced into a 500-liter reactor containing 33 kg of TATB and 25.2 kg of octogen in suspension in water.
- the product After filtration, washing with water and spinning, the product is dried to constant weight. This gives the explosive powder to be molded.
- the blanks can then be prepared by molding by subjecting the degassed molding powder, in uniaxial or isostatic molding, to a pressure of 1800 bars at 135 ° C.
- the blank thus obtained can be subjected to a heat treatment between 80 and 100 ° C for around twenty hours.
- Parts are thus obtained having a density close to 1.848 to 1.850.
- the shock sensitivity of the explosive powder is determined using a pendulum sheep on 30 mg of powder deposited in a cup.
- the coefficient of sensitivity to friction is 14.8 kgf and the threshold of sensitivity to friction is 12.8 kgf.
- the explosive of the invention is therefore much less sensitive than the octogen.
- This temperature is determined by immersing a 20 mg sample in a stainless steel container in a bath with a high temperature of 3 to 5 ° C / min, this temperature is 270 ⁇ 5 ° C.
- the volume released per 100 g of powder is determined after 70 hours of heating at 120 or 140 ° C. under vacuum.
- This gas volume is less than 12ml under normal conditions of temperature and pressure.
- a value identical to that obtained with TATB alone and octogen alone is thus obtained, but in the latter case only at the temperature of 120 ° C.
- This test is carried out on explosive pellets having a diameter of 10mm and a height of 4mm, cut from a block which has been molded under isostatic pressure.
- the height is determined for which there is a 50% reaction, this height is 2.5 m. It should be noted, however, that the reaction levels are very low: small puffs of smoke, no flame or visible light, the charge remaining whole or breaking into large pieces. Additional tests for which the explosive had been brought to -20 ° C or + 60 ° C show that the height H 0.5 and the violence of the reaction are similar to those recorded at room temperature.
- the explosive of the invention therefore has good impact resistance.
- This speed measured on 50mm diameter test pieces, is equal to 8212m.s ⁇ 1 for a density of 1.848.
- the tensile stress in the range from -20 ° C. to + 70 ° C. is from 8.2 to 8.6 MPa in the case of the explosive of the invention, ie a tensile stress close to that of the composition with TATB alone (9MPa), while the tensile stress of an composition with octogen alone is only 1MPa.
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- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
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- Crystallography & Structural Chemistry (AREA)
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Abstract
Description
La présente invention concerne une nouvelle composition explosive et ses procédés de préparation.The present invention relates to a new explosive composition and its preparation methods.
De façon plus précise, elle concerne une composition explosive ayant de bonnes performances explosives tout en présentant un niveau de sécurité très élevé.More specifically, it relates to an explosive composition having good explosive performance while having a very high level of security.
Parmi les explosifs utilisés actuellement, on connaît des explosifs tels que le triaminotrinitrobenzène (TATB) qui sont très peu sensibles aux chocs, donc présentent une bonne sécurité mais manquent de puissance, et des explosifs tels que l'octogène, l'hexogène, la pentrite et l'hexanitrostilbène (HNS) qui sont très puissants mais beaucoup plus sensibles aux chocs et aux agressions.Among the explosives currently used, there are known explosives such as triaminotrinitrobenzene (TATB) which are very insensitive to shocks, therefore have good safety but lack power, and explosives such as octogen, hexogen, pentrite and hexanitrostilbene (HNS) which are very powerful but much more sensitive to shock and attack.
Aussi, de nombreuses recherches ont été effectuées pour mettre au point de nouveaux explosifs dont la sensibilité au choc se rapproche de celle du TATB et ayant des performances explosives plus élevées et une stabilité dimensionnelle meilleure que celle du TATB.Also, a lot of research has been done to develop new explosives whose impact sensitivity is close to that of TATB and which have higher explosive performance and better dimensional stability than that of TATB.
La présente invention a précisément pour objet une composition explosive présentant ces caractéristiques avantageuses et de bonnes propriétés mécaniques, qui comprend :
- 40 à 60% en poids d'un premier explosif constitué par le triamino trinitrobenzène (TATB),
- 35 à 58°% en poids d'au moins un second explosif choisi parmi la cyclotétraméthylène tétranitramine (octogène), la cyclotriméthylènetrinitramine (hexogène), le tétranitrate de pentaérythrite (pentrite) et l'hexanitrostilbène (HNS), et
- 2 à 5% en poids d'un liant thermoplastique appartenant au groupe des polyéthers phénoliques ayant une température de transition vitreuse de 70°C à 120°C et un coefficient de dilatation au plus égal à 6.10⁻⁵°C⁻¹
- 40 to 60% by weight of a first explosive consisting of triamino trinitrobenzene (TATB),
- 35 to 58 °% by weight of at least one second explosive chosen from cyclotetramethylene tetranitramine (octogen), cyclotrimethylenetrinitramine (hexogen), pentaerythrite tetranitrate (pentrite) and hexanitrostilbene (HNS), and
- 2 to 5% by weight of a thermoplastic binder belonging to the group of phenolic polyethers having a glass transition temperature of 70 ° C to 120 ° C and a coefficient of expansion at most equal to 6.10⁻⁵ ° C⁻¹
Dans cette composition explosive, le choix d'un liant thermoplastique du type polyéther phénolique associé à du TATB et à un second explosif permet d'obtenir des performances explosives sensiblement égales à celles du second explosif, tout en ayant un niveau de sécurité élevé comparable à celui du TATB ainsi que des propriétés mécaniques, en particulier une résistance à la traction, équivalentes à celle du TATB seul et une stabilité dimensionnelle supérieure à celle du TATB seul.In this explosive composition, the choice of a thermoplastic binder of the polyether phenolic type associated with TATB and with a second explosive makes it possible to obtain explosive performances substantially equal to those of the second explosive, while having a high level of safety comparable to that of TATB as well as mechanical properties, in particular a tensile strength, equivalent to that of TATB alone and a dimensional stability greater than that of TATB alone.
Selon l'invention, on peut utiliser n'importe quel type de polyéther phénolique du moment qu'il présente une température de transition vitreuse de 70°C à 120°C et un coefficient de dilatation au plus égal à 6.10⁻⁵°C⁻¹.According to the invention, any type of phenolic polyether can be used as long as it has a glass transition temperature of 70 ° C. to 120 ° C. and a coefficient of expansion at most equal to 6.10 ° C. ¹.
En effet, ces deux paramètres sont importants car ils permettent de minimiser la dilatation anisotropique du TATB.Indeed, these two parameters are important because they make it possible to minimize the anisotropic dilation of the TATB.
A titre d'exemple, on peut utiliser un polyéther phénolique dérivé du bis-phénol A, comportant de préférence des groupes hydroxyle comme le poly-2,2 bis (p-oxy, p′-hydroxy-2 propoxy)phényl)propane (PKHJ) de formule :
dans laquelle n est un nombre entier de 82 à 123.As an example, it is possible to use a phenolic polyether derived from bis-phenol A, preferably comprising hydroxyl groups such as poly-2,2 bis (p-oxy, p′-2-hydroxy-propoxy) phenyl) propane ( PKHJ) of formula:
where n is an integer from 82 to 123.
Selon l'invention, le second explosif qui est responsable des bonnes performances explosives est un explosif puissant choisi parmi l'octogène, l'hexogène, la pentrite et l'hexanitrostilbène. On utilise de préférence l'octogène.According to the invention, the second explosive which is responsible for good explosive performance is a powerful explosive chosen from octogen, hexogen, pentrite and hexanitrostilbene. Octogen is preferably used.
Selon l'invention, la composition explosive peut comprendre de plus 0,01 à 0,05% en poids d'au moins un colorant soluble dans le polymère et compatible avec les explosifs utilisés.According to the invention, the explosive composition may also comprise 0.01 to 0.05% by weight of at least one dye soluble in the polymer and compatible with the explosives used.
Selon un mode préféré de réalisation de l'invention, la composition explosive comprend :
- 50 à 55% en poids de TATB,
- 42 à 47% en poids d'octogène,
- 2,5 à 4% en poids de poly-2,2 bis ((p-oxy, p′-hydroxy-2 propoxy)phényl)propane.
- 50 to 55% by weight of TATB,
- 42 to 47% by weight of octogen,
- 2.5 to 4% by weight of poly-2,2 bis ((p-oxy, p′-2-hydroxy-propoxy) phenyl) propane.
Selon une variante de réalisation de cette composition, celle-ci peut éventuellement comprendre 0,01 à 0,03% en poids de colorant.According to an alternative embodiment of this composition, it can optionally comprise 0.01 to 0.03% by weight of dye.
La composition explosive de l'invention peut être mise sous la forme voulue par des procédés classiques.The explosive composition of the invention can be made into the desired form by conventional methods.
Généralement, on prépare tout d'abord des grains d'explosif enrobés du liant thermoplastique que l'on agglomère ensuite par pressage à chaud en mettant à profit le ramollissement du liant thermoplastique sous l'effet de la chaleur. On obtient ainsi, après moulage et refroidissement, une ébauche qui peut être mise aux cotes voulues par usinage.Generally, explosive grains coated with the thermoplastic binder are first prepared, which is then agglomerated by hot pressing, taking advantage of the softening of the thermoplastic binder under the effect of heat. There is thus obtained, after molding and cooling, a blank which can be put to the desired dimensions by machining.
Aussi, l'invention a également pour objet un procédé de préparation d'une poudre de la composition explosive décrite ci-dessus, qui consiste :
- a) à dissoudre le liant thermoplastique dans un solvant organique non miscible à l'eau,
- b) à mettre en suspension dans une solution aqueuse le premier et le second explosifs,
- c) à introduire la solution de liant dans la suspension aqueuse d'explosifs,
- d) à éliminer les solvants par évaporation, et
- e) à filtrer, laver, essorer et sécher la poudre ainsi obtenue.
- a) dissolving the thermoplastic binder in an organic solvent immiscible with water,
- b) suspending the first and second explosives in an aqueous solution,
- c) introducing the binder solution into the aqueous suspension of explosives,
- d) removing the solvents by evaporation, and
- e) filtering, washing, wringing and drying the powder thus obtained.
On peut ensuite mouler la poudre à chaud et sous pression par exemple à une température de 120 à 140°C, et sous une pression de 180 à 220MPa pour obtenir une ébauche que l'on soumet éventuellement ensuite à un traitement thermique, généralement à une température inférieure de 10°C à la température de transition vitreuse du liant, soit à une température de 60 à 110°C, pendant 24 à 72h, avant de procéder à l'usinage final. Ce traitement thermique a pour but de stabiliser le gonflement du TATB dans l'ébauche obtenue.The powder can then be molded hot and under pressure, for example at a temperature of 120 to 140 ° C., and under a pressure of 180 to 220 MPa to obtain a blank which is then optionally subjected to a heat treatment, generally to a temperature 10 ° C lower than the glass transition temperature of the binder, ie at a temperature of 60 to 110 ° C, for 24 to 72 hours, before proceeding to the final machining. The purpose of this heat treatment is to stabilize the swelling of the TATB in the blank obtained.
Pour la préparation de la solution de liant, on peut utiliser différents solvants organiques ou mélange de solvants organiques avec éventuellement de l'eau.For the preparation of the binder solution, it is possible to use different organic solvents or a mixture of organic solvents with optionally water.
A titre d'exemple de solvants organiques utilisables, on peut citer la méthyléthylcétone.By way of example of organic solvents which can be used, mention may be made of methyl ethyl ketone.
D'autres caractéristiques et avantages de l'invention apparaîtront mieux à la lecture de la description qui suit d'un exemple de réalisation d'une composition explosive conforme à l'invention, donné bien entendu à titre illustratif et non limitatif.Other characteristics and advantages of the invention will appear better on reading the following description of an embodiment of an explosive composition in accordance with the invention, given of course by way of illustration and not limitation.
L'exemple qui suit se réfère à la réalisation d'un explosif comprenant :
- 55°% en poids de TATB,
- 42% en poids d'octogène,
- 3% en poids de PKHJ.
- 55% by weight of TATB,
- 42% by weight of octogen,
- 3% by weight of PKHJ.
Les matières de base utilisées dans cet exemple présentent les caractéristiques suivantes :The basic materials used in this example have the following characteristics:
- granulométrie : 0 à 80µmparticle size: 0 to 80µm
- densité théorique : 1,938theoretical density: 1,938
- granulométrie : 0 à 100µmparticle size: 0 to 100µm
- densité théorique : 1,905theoretical density: 1.905
- densité : 1,18density: 1.18
- domaine de température de transition vitreuse : 90 à 110°Cglass transition temperature range: 90 to 110 ° C
- coefficient de dilatation : 5,8.10⁻⁵°C⁻¹.coefficient of expansion: 5.8.10⁻⁵ ° C⁻¹.
A partir de ces matériaux de base, on prépare 60kg de poudre d'explosif à mouler en opérant de la façon suivante.From these basic materials, 60 kg of explosive powder for molding are prepared by operating in the following manner.
Dans un réacteur on prépare une solution de 1800g de PKHJ dans 25 litres d'un mélange de méthyléthylcétone et acétate de n-butyle.In a reactor, a solution of 1800 g of PKHJ in 25 liters of a mixture of methyl ethyl ketone and n-butyl acetate is prepared.
Dans un réacteur de 500 litres contenant en suspension dans l'eau 33kg de TATB et 25,2kg d'octogène, on introduit progressivement la solution de liant précédente.The preceding binder solution is gradually introduced into a 500-liter reactor containing 33 kg of TATB and 25.2 kg of octogen in suspension in water.
Tout en maintenant l'agitation, et après granulation du produit, on élimine les solvants par distillation sous pression réduite.While maintaining stirring, and after granulation of the product, the solvents are removed by distillation under reduced pressure.
Après filtration, lavage à l'eau et essorage, on sèche le produit jusqu'à poids constant. On obtient ainsi la poudre d'explosif à mouler.After filtration, washing with water and spinning, the product is dried to constant weight. This gives the explosive powder to be molded.
On peut préparer ensuite par moulage des ébauches en soumettant la poudre à mouler dégazée, en moulage uniaxial ou isostatique, à une pression de 1800 bars à 135°C.The blanks can then be prepared by molding by subjecting the degassed molding powder, in uniaxial or isostatic molding, to a pressure of 1800 bars at 135 ° C.
Pour améliorer la stabilité dimensionnelle, l'ébauche ainsi obtenue peut être soumise à un traitement thermique entre 80 et 100°C pendant une vingtaine d'heures.To improve dimensional stability, the blank thus obtained can be subjected to a heat treatment between 80 and 100 ° C for around twenty hours.
On obtient ainsi des pièces ayant une densité voisine de 1,848 à 1,850.Parts are thus obtained having a density close to 1.848 to 1.850.
On détermine maintenant les caractéristiques de l'explosif ainsi obtenu.The characteristics of the explosive thus obtained are now determined.
On effectue différents essais pour tester la sécurité de l'explosif.Various tests are carried out to test the safety of the explosive.
La sensibilité au choc de la poudre d'explosif est déterminée à l'aide d'un mouton pendulaire sur 30mg de poudre déposée dans une coupelle.The shock sensitivity of the explosive powder is determined using a pendulum sheep on 30 mg of powder deposited in a cup.
Dans cet essai, on détermine la hauteur qui correspond à 50% de réaction. Celle-ci est de 0,45m (niveau de réaction très faible) alors qu'elle est de 0,15m pour l'octogène qui sert de témoin.In this test, the height which corresponds to 50% reaction is determined. This is 0.45m (very low reaction level) while it is 0.15m for the octogen which serves as a control.
Cette mesure est effectuée sur la poudre d'explosif au moyen de l'appareil Julius Peters. Avec cet appareil au maximum de ses possibilités (36kgf), on n'observe aucune réaction comme dans le cas du TATB seul.This measurement is performed on the powder explosive using the Julius Peters device. With this device to the maximum of its possibilities (36kgf), no reaction is observed as in the case of TATB alone.
Dans le cas de l'octogène seul, le coefficient de sensibilité à la friction est de 14,8kgf et le seuil de sensibilité à la friction de 12,8kgf.In the case of octogen alone, the coefficient of sensitivity to friction is 14.8 kgf and the threshold of sensitivity to friction is 12.8 kgf.
L'explosif de l'invention est donc beaucoup moins sensible que l'octogène.The explosive of the invention is therefore much less sensitive than the octogen.
Cette température est déterminée en plongeant un échantillon de 20mg en conteneur d'acier inoxydable dans un bain dont la température est élevée de 3 à 5°C/min, cette température est de 270±5°C.This temperature is determined by immersing a 20 mg sample in a stainless steel container in a bath with a high temperature of 3 to 5 ° C / min, this temperature is 270 ± 5 ° C.
Dans cet essai, on détermine le volume dégagé pour 100g de poudre après 70h de chauffage à 120 ou 140°C sous vide. Ce volume de gaz est inférieur à 12ml dans les conditions normales de température et de pression. On obtient ainsi une valeur identique à celle que l'on obtient avec le TATB seul et l'octogène seul mais dans ce dernier cas seulement à la température de 120°C.In this test, the volume released per 100 g of powder is determined after 70 hours of heating at 120 or 140 ° C. under vacuum. This gas volume is less than 12ml under normal conditions of temperature and pressure. A value identical to that obtained with TATB alone and octogen alone is thus obtained, but in the latter case only at the temperature of 120 ° C.
Cet essai est effectué sur des pastilles d'explosif ayant un diamètre de 10mm et une hauteur de 4mm, découpées dans un bloc qui a été moulé sous pression isostatique.This test is carried out on explosive pellets having a diameter of 10mm and a height of 4mm, cut from a block which has been molded under isostatic pressure.
Dans le cas de pastilles nues, des réactions partielles sont enregistrées pour des hauteurs de chute du marteau de 11kg à partir de 2m. Il est toutefois à noter que le niveau de réaction rencontré est toujours relativement faible et varie progressivement en fonction de la sollicitation à laquelle est soumise la pastille.In the case of bare pellets, partial reactions are recorded for hammer drop heights of 11kg from 2m. It should however be noted that the level of reaction encountered is always relatively low and varies gradually depending on the stress to which the pellet is subjected.
On réalise le même essai de sensibilité au choc sur des pastilles de mêmes dimensions confinées dans des cylindres en acier.The same impact sensitivity test is carried out on pellets of the same dimensions confined in steel cylinders.
Dans ce cas, des réactions faibles et très partielles sont enregistrées pour des hauteurs de chute du marteau de 11kg supérieures à 1,50m.In this case, weak and very partial reactions are recorded for drop heights of the hammer of 11 kg greater than 1.50 m.
Dans les mêmes conditions d'essai, l'octogène donne des réactions violentes et totales pour une hauteur de chute voisine de 0,75m.Under the same test conditions, the octogen gives violent and total reactions for a fall height close to 0.75 m.
Ces essais ont été faits avec un angle d'incidence de 14°.These tests were carried out with an angle of incidence of 14 °.
Dans ces essais on détermine la hauteur pour laquelle on a 50% de réaction, cette hauteur est de 2,5m. Il faut cependant noter que les niveaux de réaction sont très faibles : petites bouffées de fumée, pas de flamme ou de lumière visible, la charge restant entière ou se brisant en gros morceaux. Des essais complémentaires pour lesquels l'explosif avait été porté à -20°C ou +60°C montrent que la hauteur H0,5 et la violence de la réaction sont semblables à celles enregistrées à l'ambiante.In these tests, the height is determined for which there is a 50% reaction, this height is 2.5 m. It should be noted, however, that the reaction levels are very low: small puffs of smoke, no flame or visible light, the charge remaining whole or breaking into large pieces. Additional tests for which the explosive had been brought to -20 ° C or + 60 ° C show that the height H 0.5 and the violence of the reaction are similar to those recorded at room temperature.
L'explosif de l'invention a donc une bonne résistance au choc.The explosive of the invention therefore has good impact resistance.
Cette vitesse, mesurée sur éprouvettes de 50mm de diamètre, est égale à 8212m.s⁻¹ pour une densité de 1,848.This speed, measured on 50mm diameter test pieces, is equal to 8212m.s⁻¹ for a density of 1.848.
Ces essais ont été réalisés sur des éprouvettes haltères de section 10x10mm usinées dans des blocs réalisés par moulage isostatique, à une vitesse de déformation constante égale à 10⁻³/min. Les mesures sont effectuées sur une machine SCHENCK RME 50 munie de son asservissement.These tests were carried out on 10x10mm dumbbell specimens machined in blocks produced by isostatic molding, at a constant deformation speed equal to 10⁻³ / min. The measurements are carried out on a SCHENCK RME 50 machine provided with its servo-control.
Les valeurs moyennes obtenues sont données dans le tableau 1 suivant pour trois températures d'essais.The average values obtained are given in the following table 1 for three test temperatures.
Ainsi, la contrainte de traction dans le domaine allant de -20°C à +70°C est de 8,2 à 8,6MPa dans le cas de l'explosif de l'invention, soit une contrainte de traction voisine de celle de la composition au TATB seul (9MPa), alors que la contrainte de traction d'une composition à l'octogène seul est seulement de 1MPa.Thus, the tensile stress in the range from -20 ° C. to + 70 ° C. is from 8.2 to 8.6 MPa in the case of the explosive of the invention, ie a tensile stress close to that of the composition with TATB alone (9MPa), while the tensile stress of an composition with octogen alone is only 1MPa.
Ainsi, on obtient avec l'explosif de l'invention des contraintes de traction sensiblement égales à celles que l'on obtient dans le cas du TATB bien que l'explosif comprenne plus de 40% d'octogène qui présente une contrainte de traction nettement inférieure. Ce résultat est dû à la présence simultanée du liant et du TATB qui supprime l'effet pénalisant de l'octogène.Thus, with the explosive of the invention, tensile stresses substantially equal to those obtained in the case of TATB are obtained, although the explosive comprises more than 40% octogen which has a tensile stress clearly lower. This result is due to the simultaneous presence of the binder and of the TATB which suppresses the penalizing effect of the octogen.
Ces essais sont effectués sur des cylindres d'un diamètre de 10mm et d'une hauteur de 20mm usinés dans des blocs réalisés par moulage isostatique. Les mesures ont été faites sur machine Schenck RM 50 munie de son asservissement, les essais ayant eu lieu à une vitesse de déformation constante de 10⁻²/min et les mesures étant réalisées directement sur l'éprouvette grâce à un extensomètre.These tests are carried out on cylinders with a diameter of 10mm and a height of 20mm machined in blocks produced by isostatic molding. The measurements were made on a Schenck RM 50 machine provided with its servo-control, the tests having taken place at a constant deformation speed of 10⁻² / min and the measurements being carried out directly on the test piece using an extensometer.
Les valeurs moyennes obtenues à trois températures d'essai sont données dans le tableau 2 qui suit.
Claims (9)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9100441 | 1991-01-16 | ||
| FR9100441A FR2671549A1 (en) | 1991-01-16 | 1991-01-16 | EXPLOSIVE COMPOSITION AND METHODS FOR PREPARING A POWDER AND A PART THEREOF |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0495714A1 true EP0495714A1 (en) | 1992-07-22 |
| EP0495714B1 EP0495714B1 (en) | 1996-04-17 |
Family
ID=9408728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19920400102 Expired - Lifetime EP0495714B1 (en) | 1991-01-16 | 1992-01-15 | Explosive composition and process for making powder and a piece from this composition |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0495714B1 (en) |
| DE (1) | DE69209857T2 (en) |
| DK (1) | DK0495714T3 (en) |
| ES (1) | ES2087467T3 (en) |
| FR (1) | FR2671549A1 (en) |
| GR (1) | GR3020466T3 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0794163A1 (en) * | 1996-03-04 | 1997-09-10 | Schlumberger Limited | Shaped charge containing triaminotrinitrobenzene |
| WO2004023062A1 (en) * | 2002-09-05 | 2004-03-18 | Baker Hughes Incorporated | Desensitized shaped charge explosive |
| WO2005037735A2 (en) * | 2002-09-05 | 2005-04-28 | Baker Hughes Incorporated | Main body of explosive composition |
| GB2512345A (en) * | 2013-03-27 | 2014-10-01 | Bae Systems Plc | Insensitive munition propellants |
| US9919980B2 (en) | 2013-03-27 | 2018-03-20 | Bae Systems Plc | Insensitive munition propellants |
| US10526256B2 (en) | 2013-03-27 | 2020-01-07 | Bae Systems Plc | Non-phthalate propellants |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5034073A (en) * | 1990-10-09 | 1991-07-23 | Aerojet General Corporation | Insensitive high explosive |
| FR2807156B1 (en) | 2000-03-30 | 2002-12-13 | Commissariat Energie Atomique | DUAL FUNCTIONAL PYROTECHNIC LOAD |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2313886A1 (en) * | 1972-03-20 | 1973-10-11 | Aerojet General Co | FLEXIBLE SELF-SUPPORTING EXPLOSIVE SUBSTANCE |
| US4325759A (en) * | 1979-12-17 | 1982-04-20 | The United States Of America As Represented By The Secretary Of The Army | Preparation of TNT-thermoplastic polymer granules readily soluble in a TNT melt |
| US4394197A (en) * | 1981-05-19 | 1983-07-19 | The United States Of America As Represented By The Secretary Of The Navy | Cook-off resistant booster explosive |
| EP0125166A1 (en) * | 1983-05-03 | 1984-11-14 | Commissariat A L'energie Atomique | Cold-mouldable explosive composition and process for its preparation |
-
1991
- 1991-01-16 FR FR9100441A patent/FR2671549A1/en active Granted
-
1992
- 1992-01-15 DE DE1992609857 patent/DE69209857T2/en not_active Expired - Lifetime
- 1992-01-15 DK DK92400102T patent/DK0495714T3/en active
- 1992-01-15 EP EP19920400102 patent/EP0495714B1/en not_active Expired - Lifetime
- 1992-01-15 ES ES92400102T patent/ES2087467T3/en not_active Expired - Lifetime
-
1996
- 1996-07-05 GR GR960401832T patent/GR3020466T3/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2313886A1 (en) * | 1972-03-20 | 1973-10-11 | Aerojet General Co | FLEXIBLE SELF-SUPPORTING EXPLOSIVE SUBSTANCE |
| US4325759A (en) * | 1979-12-17 | 1982-04-20 | The United States Of America As Represented By The Secretary Of The Army | Preparation of TNT-thermoplastic polymer granules readily soluble in a TNT melt |
| US4394197A (en) * | 1981-05-19 | 1983-07-19 | The United States Of America As Represented By The Secretary Of The Navy | Cook-off resistant booster explosive |
| EP0125166A1 (en) * | 1983-05-03 | 1984-11-14 | Commissariat A L'energie Atomique | Cold-mouldable explosive composition and process for its preparation |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0794163A1 (en) * | 1996-03-04 | 1997-09-10 | Schlumberger Limited | Shaped charge containing triaminotrinitrobenzene |
| WO2004023062A1 (en) * | 2002-09-05 | 2004-03-18 | Baker Hughes Incorporated | Desensitized shaped charge explosive |
| WO2005037735A2 (en) * | 2002-09-05 | 2005-04-28 | Baker Hughes Incorporated | Main body of explosive composition |
| WO2005037735A3 (en) * | 2002-09-05 | 2005-11-17 | Baker Hughes Inc | Main body of explosive composition |
| GB2512345A (en) * | 2013-03-27 | 2014-10-01 | Bae Systems Plc | Insensitive munition propellants |
| US9919980B2 (en) | 2013-03-27 | 2018-03-20 | Bae Systems Plc | Insensitive munition propellants |
| US10526256B2 (en) | 2013-03-27 | 2020-01-07 | Bae Systems Plc | Non-phthalate propellants |
| GB2512345B (en) * | 2013-03-27 | 2021-06-30 | Bae Systems Plc | Insensitive munition propellants |
Also Published As
| Publication number | Publication date |
|---|---|
| DE69209857T2 (en) | 1996-10-31 |
| DE69209857D1 (en) | 1996-05-23 |
| DK0495714T3 (en) | 1996-08-05 |
| FR2671549B1 (en) | 1994-04-22 |
| FR2671549A1 (en) | 1992-07-17 |
| ES2087467T3 (en) | 1996-07-16 |
| GR3020466T3 (en) | 1996-10-31 |
| EP0495714B1 (en) | 1996-04-17 |
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