Casting type energetic adhesive-based composite explosive and preparation method thereof

A technology of mixing explosives and adhesives, which is applied in the direction of explosives, non-explosive/non-thermal agent components, non-explosive fillers/gelling agents/thickeners, etc., which can solve the problems of large curing chemical reactions, long curing cycles, Problems such as large differences in quality content

Active Publication Date: 2021-07-30
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Casting type energetic adhesive-based composite explosive and preparation method thereof
  • Casting type energetic adhesive-based composite explosive and preparation method thereof
  • Casting type energetic adhesive-based composite explosive and preparation method thereof

Examples

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Effect test

preparation example Construction

[0094] The invention also discloses a preparation method of a pourable energetic binder-based mixed explosive, which includes the following steps:

[0095] 1) Weigh the azide binder, acetylenic alcohol compound, functional additive and energetic plasticizer into the container according to the proportioning requirements, stir evenly, and then add to the kneader;

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

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

[0098] Among them, the composition and proportion (mass percentage) of the castable energetic binder...

Embodiment 1 and comparative example 1

[0117] The composition of table 1 embodiment 1 and comparative example 1, proportioning and performance test result

[0118]

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

[0120] The results show that compared with the common metal fuel, 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.

Embodiment 2 and comparative example 2

[0122] The composition of table 2 embodiment 2 and comparative example 2, proportioning and performance test result

[0123]

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

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

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Abstract

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

Description

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

Claims

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Application Information

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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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