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Adhesive system suitable for insensitive munitions and preparation method

A binder and system technology, applied in the direction of non-explosive/non-thermal agent components, non-explosive fillers/gelling agents/thickeners, explosives, etc., can solve the problem of affecting the energy output of the ammunition system, reducing ammunition sensitivity, ammunition energy, etc. reduce problems, achieve the effect of increasing dosage, improving insensitivity, and increasing energy output

Inactive Publication Date: 2019-10-08
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, high energy and insensitivity are a contradiction. While reducing ammunition sensitivity, it will lead to a decrease in ammunition energy
In the field of cast explosives, the traditional binder system is based on hydroxyl-terminated polybutadiene (HTPB), whose main chain is composed of -CH 2 -The long chain of the composition has the disadvantages of low oxygen content, poor compatibility with nitrate plasticizers, and high electrostatic sensitivity, which seriously affects the energy output of the ammunition system

Method used

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  • Adhesive system suitable for insensitive munitions and preparation method
  • Adhesive system suitable for insensitive munitions and preparation method
  • Adhesive system suitable for insensitive munitions and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A suitable insensitive ammunition binder system, consisting of the following raw materials by weight: 30g of hydroxyl-terminated block copolyether HTPE, 3.6g of multifunctional isocyanate N-100, 25g of butyl nitrate ethyl nitramine Bu-NENA, catalyst Dibutyltin Dilaurate T 12 Appropriate amount.

[0027] A preparation method suitable for insensitive ammunition binder system:

[0028] (1) Raw material pretreatment. The hydroxyl-terminated polyether and butyl nitrate ethyl nitramine were respectively placed in a rotary evaporator, the temperature was controlled at 80 °C, the vacuum degree was below 0 MPa, the rotary evaporator speed was adjusted to 60 rpm, and the rotary evaporator was 2 hours. Preheat the dehydrated hydroxyl-terminated polyether, butyl nitrate ethyl nitramine, and curing agent multifunctional isocyanate in an oven at 45°C for later use.

[0029] (2) Suitable for the preparation of insensitive ammunition binder system. Accurately weigh the pretreated h...

Embodiment 2

[0031] A binder system suitable for insensitive ammunition, consisting of the following raw materials by weight: 30g of hydroxyl-terminated block copolyether HTPE, 1.98g of multifunctional isocyanate N-100, 1.15g of isophorone diisocyanate IPDI, bis(2, 2 dinitropropanol) acetal / bis(2,2 dinitropropanol) formal BDNPA / BDNPF 20g, catalyst tris-(ethoxyphenyl bismuth)TEPB appropriate amount.

[0032] A preparation method suitable for insensitive ammunition binder system:

[0033] (1) Raw material pretreatment. Put hydroxyl-terminated polyether and bis(2,2-dinitropropanol) acetal / bis(2,2-dinitropropanol) formal in a rotary evaporator, control the temperature at 85°C and vacuum to -0.05MPa, adjust the rotating speed to 60rpm, and rotate for 2h. The dehydration-treated hydroxyl-terminated polyether and bis(2,2 dinitropropanol) acetal / bis(2,2 dinitropropanol) formal and curing agent multifunctional isocyanate and isophor Ketone diisocyanate was preheated in an oven at 50°C and set as...

Embodiment 3

[0036] An adhesive system suitable for insensitive ammunition, consisting of the following raw materials: 30g of hydroxyl-terminated block copolyether HTPE, 3.6g of multifunctional isocyanate N-100, 25g of diethylene glycol dinitrate DEGDN, catalyst three - (ethoxyphenyl bismuth) TEPB qs.

[0037] A preparation method suitable for insensitive ammunition binder system:

[0038] (1) Raw material pretreatment. The hydroxyl-terminated polyether and diethylene glycol dinitrate were respectively placed in a rotary evaporator, the temperature was controlled at 80°C, the vacuum degree was -0.05MPa, the rotational speed of the rotary evaporator was adjusted to 70rpm, and the rotary evaporator was 2h. Preheat the dehydration-treated hydroxyl-terminated polyether, diethylene glycol dinitrate, and curing agent multifunctional isocyanate in an oven at 50°C for later use.

[0039](2) Suitable for the preparation of insensitive ammunition binder system. Accurately weigh the pretreated hyd...

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Abstract

The invention provides an adhesive system suitable for insensitive munitions and a preparation method. The adhesive system is prepared by, by weight, 40-50 parts of polyol, 30-60 parts of energetic plasticizer, 5-10 parts of polyisocyanate, 0.0002-0.001 part of catalyst. During preparation, raw material preprocessing including the rotary evaporation dewatering of the polyol and the energetic plasticizer and raw material preheating is performed during preparation, the polyol and the energetic plasticizer are then premixed, and a curing agent is added finally and sufficient and uniform mixing isperformed to perform curing at 55-65 DEG C for 4-7 days. Compared with a traditional hydroxyl-terminated polybutadiene-based (HTPB-based) adhesive system, the adhesive system is high in oxygen content, good in compatibility with the energetic plasticizer, and capable of evidently increasing the energy output of an explosive system; the adhesive system is mild in reaction under a heat stimulationcondition and melts and expand when being heated to break through a munition shell, explosion possibility under the heat stimulation condition is lowered, and munition insensitivity is increased.

Description

technical field [0001] The invention belongs to the technical field of cast PBX explosives and insensitive ammunition, and in particular relates to a binder system suitable for insensitive ammunition and a preparation method thereof. Background technique [0002] The modern battlefield environment is deteriorating day by day, and major accidental safety accidents caused by the vulnerability of the ammunition system itself have brought a heavy price to people. The research on high-energy and insensitive ammunition technology is the key to improving the survivability of the ammunition battlefield. Since the early 1970s, the United States took the lead in proposing the concept of insensitive ammunition, successively developed a variety of insensitive ammunition such as PBXN-109, PBXN-110, and PBXN-129, and formulated the military standard for insensitive ammunition MIL- STD-2105C, for assessing the safety and hazards of munitions. At the same time, NATO has also formulated the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B23/00C08G18/48
CPCC06B23/001C08G18/48
Inventor 闫石沈忱焦清介
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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