Classifications

• • 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
• • 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
• • 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
• 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'-hydroxy-2-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 can 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 are 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 possibly 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 final machining.
• a heat treatment generally 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 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 is determined for 100 g of powder after 70 hours of heating at 120 or 140 ° C. under vacuum.
• This volume of gas 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.
• Table 2 The average values obtained at three test temperatures are given in Table 2 below.
• Table 1 Test temperature (° C) -20 +20 +70 Tensile stress (MPa) 8.2 8.4 8.6 Elongation (%) 0.07 0.10 0.12 Traction module (MPa) 11200 9600 8800 Test temperature (° C) -20 +20 +70 Compression stress (MPa) 46 45 39 Elongation (%) 1.3 1.4 1.6 Compression module (MPa) 8700 9000 7900

Landscapes

• 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)
• Compositions Of Macromolecular Compounds (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=9408728

Family Applications (1)

Country Status (6)

Families Citing this family (8)

Family Cites Families (4)

• 1991
  • 1991-01-16 FR FR9100441A patent/FR2671549A1/fr active Granted
• 1992
  • 1992-01-15 ES ES92400102T patent/ES2087467T3/es not_active Expired - Lifetime
  • 1992-01-15 DK DK92400102T patent/DK0495714T3/da active
  • 1992-01-15 EP EP19920400102 patent/EP0495714B1/fr not_active Expired - Lifetime
  • 1992-01-15 DE DE1992609857 patent/DE69209857T2/de not_active Expired - Lifetime
• 1996
  • 1996-07-05 GR GR960401832T patent/GR3020466T3/el unknown

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