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A method of coating cl-20 explosives with a double-layer insensitivity structure

A CL-20, explosive technology, applied in the directions of explosives, explosives processing equipment, non-explosive/non-thermal agent components, etc., can solve the problems of high sensitivity, polygonal crystal shape, limited application, etc., and achieves simple steps, easy to control, reduce The effect of mechanical sensitivity

Active Publication Date: 2020-04-21
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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  • A method of coating cl-20 explosives with a double-layer insensitivity structure
  • A method of coating cl-20 explosives with a double-layer insensitivity structure

Examples

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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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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 Patents(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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