A kind of cast-type energetic binder-based mixed explosive and preparation method thereof

A technology of mixing explosives and adhesives, applied in the directions of explosives, non-explosive/non-thermal agents, non-explosive fillers/gelling agents/thickeners, etc. Too high, large differences in mass content, etc., to shorten the curing reaction cycle, improve chemical reactivity, and high density

Active Publication Date: 2022-07-01
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different from the working principle of mixed explosives, the research on the formula of azide propellant is quite different from that of mixed explosives. Nitrogen propellants are all cured by the reaction of hydroxyl groups on the azide adhesive with isocyanate. Since the reactivity of hydroxyl groups is not too high, there is a long curing cycle, and the curing chemical reaction is greatly affected by moisture.

Method used

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  • A kind of cast-type energetic binder-based mixed explosive and preparation method thereof
  • A kind of cast-type energetic binder-based mixed explosive and preparation method thereof
  • A kind of cast-type energetic binder-based mixed explosive and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0094] The invention also discloses a preparation method of a castable energy-containing binder-based mixed explosive, comprising the following steps:

[0095] 1) Weigh the azide adhesive, alkynyl alcohol compound, functional auxiliaries and energy-containing plasticizer into the container according to the proportioning requirements, and after stirring evenly, add it to the kneader;

[0096] 2) Add rare earth-metal alloy fuel, oxidant, explosive and isocyanate curing agent into the premix described in step 1 in turn according to the proportioning requirements, and fully mix them uniformly in the kneader to form a compound with good fluidity and leveling. syrup;

[0097] 3) The slurry obtained in step 2) is poured into the warhead or the mold under vacuum conditions, and cured for 4 to 6 days at a temperature of 40°C to 60°C to obtain a pourable energetic binder-based mixed explosive.

[0098] Among them, the composition and proportion (mass percentage) of the cast-type energe...

Embodiment 1 and comparative example 1

[0117] Table 1 Composition, ratio and performance test results of Example 1 and Comparative Example 1

[0118]

[0119] Table 1 shows that the density of Comparative Example 1 is 2.074 g / cm 3 , the explosion heat is 9176kJ / kg, the energy density equivalent is 2.84TNT; the density of Example 1 is 2.152g / cm 3 , the explosion heat is 9687kJ / kg, and the energy density equivalent is 3.12TNT, which is significantly higher than that of Comparative Example 1.

[0120] The results show that the rare earth-metal alloy fuel selected by the present invention is beneficial to improve the density, detonation heat and energy density of the mixed explosive compared with the common metal fuel.

Embodiment 2 and comparative example 2

[0122] Table 2 Composition, ratio and performance test results of Example 2 and Comparative Example 2

[0123]

[0124] Table 2 shows that the density of Example 2 with a solids content of 85% is 2.130 g / cm 3 , the explosion heat is 9726kJ / kg, the energy density is 3.10TNT, the explosive can complete the curing reaction in 5d when the curing temperature is 50 ℃; the solid content is 88% in Comparative Example 2 (AFX-757 modified formula (CL-20 etc The density and heat of explosion of RDX)) are 1.887g / cm, respectively 3 , 7569kJ / kg, and the energy density is 2.14TNT, which are all lower than those of Example 2, and the curing reaction of Comparative Example 2 takes 8d to complete the curing reaction at 60°C.

[0125] The results show that 1) the energetic binder has good compatibility with the energetic plasticizer, and the density, explosion heat and energy density of the prepared mixed explosive are greatly improved; 2) the energetic binder is bonded by azide The additio...

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Abstract

The invention discloses a casting type energetic binder-based mixed explosive, which comprises the following components by mass percentage: energetic binder curing system: 5.0%-10.0%, energetic plasticizer: 4.5%-10.0% , explosive: 15% to 40%, oxidant: 20% to 40%, fuel: 30% to 40%, wherein the fuel is a rare earth-metal alloy, or the fuel is a mixture of rare earth-metal alloy and aluminum, the invention also discloses A preparation method of a casting type energetic binder-based mixed explosive is presented. The mixed explosive prepared by the invention has the excellent characteristics of short curing period, high density, high explosion heat and high energy density due to the use of components such as energetic binder curing system, rare earth-metal alloy fuel and high energy density explosive.

Description

technical field [0001] The invention belongs to the field of formula development of explosives, and in particular relates to a pourable energy-containing binder-based mixed explosive and a preparation method thereof. Background technique [0002] Castable polymer bonded explosives (PBX) are widely used in various warhead charges due to their excellent mechanical properties, suitable sensitivity and controllable energy properties. The binder system is an important part of the castable PBX explosive. Among them, the hydroxyl-terminated polybutadiene (HTPB)-based castable PBX explosive is gradually replacing the pressure in some ammunition due to its simple production process and the ability to adapt to complex charge structures. Load explosives. However, since HTPB is a non-energetic binder, it has poor compatibility with energetic plasticizers such as nitrates, nitro groups and azides. It can only be used in combination with non-energetic plasticizers. The energy contributi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B33/06C06B23/00
CPCC06B33/06C06B23/00C06B23/001
Inventor 陈中娥陈莉程迪李忠友王鹏张天福赵新岩肖运钦王帅
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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