Method of coating CL-20 explosive with double-layer insensitive structure

A technology of CL-20 and explosives, which is applied in explosives, explosives processing equipment, non-explosive/non-thermal agent components, etc., can solve the problems of high sensitivity, multi-angular crystal shape, and limited application, and achieve simple steps, easy control, and low The effect of mechanical sensitivity

Active Publication Date: 2018-06-19
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the raw material ε-CL-20 has a multi-angular crystal shape and high sensitivity, which limits its application in energetic materials such as propellants and mixed explosives. Therefore, it is necessary to desensitize CL-20 to realize the engineering application
[0003] Coating is an effective method to improve the safety of energetic materials. The influence of insensitive energetic materials, polymers and coating technology on the mechanical sensitivity of CL-20 has been mainly studied at home and abroad. A double-layer insensitive structure is used to coat CL-20. 20 Sensation-reducing techniques have yet to be discovered
In addition, the water suspension method is often used for the coating of explosives, which has a good coating effect, but the process is more complicated.

Method used

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  • Method of coating CL-20 explosive with double-layer insensitive structure
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Effect test

Embodiment approach

[0026] According to a preferred embodiment of the present invention, the method for coating CL-20 explosives with a double-layer insensitivity structure includes:

[0027] 1) Coating the first desensitizing agent with a layered structure and low friction coefficient on the surface of CL-20 by dry mixing method to prepare a primary coated CL-20 explosive compound;

[0028] 2) Dissolving the second desensitizing agent with high specific heat capacity and low melting point in a solvent to prepare a second desensitizing agent solution with a mass concentration of 5% to 15%;

[0029] 3) Add the second desensitizing agent solution into the kneader, then add the primary coated CL-20 explosive compound into the kneader, set the kneader speed to 10-15r / min, alternate forward and reverse, and the kneading temperature is 50~60℃, the kneading time is 40~70min, after kneading, turn on the vacuum equipment, the vacuum degree is 0.01~0.04MPa, dry after the solvent evaporates, and then prepar...

Embodiment 1

[0035] This example is used to illustrate the method of the present invention for coating CL-20 explosives with a double-layer insensitivity structure.

[0036] Specifically include the following steps:

[0037] (1) Weigh 1000g of CL-20 and 3g of molybdenum disulfide and place them in a mixer. The rotation speed of the mixer is 6r / min, and the mixing time is 40min. After mixing, a primary coated CL-20 explosive compound is prepared. things.

[0038] (2) 20 g of No. 70 paraffin was dissolved in 300 g of petroleum ether at a dissolution temperature of 50-60° C. to prepare a desensitizing agent solution with a mass concentration of 10% for use.

[0039] (3) Keep the temperature of the kneader jacket at 50-60°C, add the prepared primary coated CL-20 explosive compound into the kneader, then add the insensitivity agent solution, set the kneader speed to 10r / min, front and back Rotation is carried out alternately, the kneading temperature is 50-60°C, and the kneading time is 50 mi...

Embodiment 2

[0042] This example is used to illustrate the method of the present invention for coating CL-20 explosives with a double-layer insensitivity structure.

[0043] Specifically include the following steps:

[0044] (1) Weigh 1000g of CL-20 and 3g of molybdenum disulfide and place them in a mixer. The speed of the mixer is 5r / min, and the mixing time is 40min. After mixing, a primary coated CL-20 explosive compound is prepared. things.

[0045] (2) 20g of calcium stearate is dissolved in 300g of benzene, and the dissolution temperature is 50-60° C. to prepare a desensitizing agent solution with a mass concentration of 10%, which is ready for use.

[0046](3) Keep the temperature of the kneader jacket at 50-60°C, add the prepared primary coated CL-20 explosive compound into the kneader, then add the insensitivity agent solution, set the kneader speed to 10r / min, front and back Rotation is carried out alternately, the kneading temperature is 50-60°C, and the kneading time is 60 mi...

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PUM

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Abstract

Belonging to the CL-20 explosive coating field, the invention specifically provides a method of coating CL-20 explosive with a double-layer insensitive structure. The method includes the steps of: 1)coating the surface of CL-20 with a first desensitizing agent by dry blending to obtain a primary coated CL-20 explosive compound; 2) dissolving a second desensitizing agent in a solvent to obtain a second desensitizing agent solution; and 3) subjecting the second desensitizing agent solution and the primary coated CL-20 explosive compound to kneading in a kneading machine, conducting vacuum pumping, volatilizing the solvent, and then performing drying to obtain the CL-20 explosive coated with the double-layer insensitive structure. The method provided by the invention can enable the formationof a uniform coating layer on the CL-20 explosive surface, significantly reduces the mechanical sensitiveness of CL-20 explosive, has simple operation steps, is easy to control, and is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the coating field of CL-20 explosives, and in particular relates to a method for coating CL-20 explosives with a double-layer insensitivity structure. Background technique [0002] As a high energy density compound, CL-20 has a theoretical detonation velocity 350m / s higher than that of HMX, a detonation pressure 15.1% higher and an energy density 7.5% higher. In addition, the propellant or explosive formula containing CL-20 can significantly increase the burning rate, specific impulse and explosion energy. Adding CL-20 to NEPE propellant can increase the specific impulse by about 54N s / kg; Lawrence Lever, USA LX-19 (95.8% CL-20 / 4.2% Estane5703-P) developed by Mohr Laboratory has a density of 1.920g / cm3, a detonation pressure of 41.5GPa, and a detonation velocity of 9104m / s. The energy output ratio of the cylinder test is LX -14 (HMX95.5 / Estane4.5) is 14% higher; the pressure-packed explosive PAX-29 (77% CL-20 / 15) jointly devel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B23/00C06B21/00
CPCC06B21/0083C06B23/002
Inventor 焦清介郭学永张静元闫石张洪垒李任然吴成成赵佳辰
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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