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HTPB (hydroxy-terminated polybutadiene) based casting mixed explosive formula with improved process property

A technology of mixed explosives and process performance, which is applied in the direction of explosives, non-explosive/non-thermal agent components, nitrated acyclic/alicyclic/heterocyclic amine explosive compositions, etc., and can solve the requirements that cannot effectively reduce the viscosity and vacuum degree of the slurry Higher, process performance and other issues, to achieve the effect of improving fluidity and leveling, improving fluidity, and promoting surface coating

Inactive Publication Date: 2019-03-08
HUBEI INST OF AEROSPACE CHEMOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since styrene is difficult to remove completely, it is less used at present
[0007] Chinese patent CN103145512B uses styrene with a mass fraction of 1% as a process additive to obtain a high-solid-content pouring explosive, in which the content of HMX solid particles is as high as 90%; at the same time, the invention patent uses a specially processed vacuum casting The device removes styrene in the slurry through vacuum vibration during the pre-casting process, but the structure of the device is relatively complicated, and the pouring process requires a high degree of vacuum, and the slurry is poured into the mold or projectile under vacuum vibration
When the solid content of the explosive formula RDX or HMX is 88% respectively, the use of naphthenic oil as a plasticizer cannot effectively reduce the viscosity of the slurry
When the formulation of castable mixed explosives contains other solid particles, such as oxidant ammonium perchlorate and aluminum powder as metal fuel, the impact of using naphthenic oil as a plasticizer on the process performance of these explosive formulation systems has not been reported
At the same time, there is no report on the use of simethicone oil and stearic acid process additives in this invention patent

Method used

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  • HTPB (hydroxy-terminated polybutadiene) based casting mixed explosive formula with improved process property
  • HTPB (hydroxy-terminated polybutadiene) based casting mixed explosive formula with improved process property
  • HTPB (hydroxy-terminated polybutadiene) based casting mixed explosive formula with improved process property

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Using DOS and naphthenic oil as plasticizers, two formulations of HTPB-based castable mixed explosives with RDX as the main explosive component were prepared. The formulation composition and properties are shown in Table 1 below.

[0030] Table 1 The formula composition and properties of DOS and naphthenic oil as plasticizer and RDX as main explosive respectively

[0031]

[0032] Note: Other components in cast explosives include anti-aging agent, curing catalyst, bonding agent, etc., and the following formulas are the same.

[0033] The slurry viscosity test instrument is a HAAKE rotational rheometer, the test temperature is 50°C when the curing agent is TDI, and the test temperature is 60°C when the curing agent is IPDI. The following formula test methods are the same.

[0034] Formula 1 is a 90% solid content aluminum-containing RDX-based pouring explosive, and the plasticizing ratio of the formula is 1.15. Compared with plasticizer DOS, the cast explosive formul...

Embodiment 2

[0036] A formulation of HTPB-based pouring explosives with HMX as the main explosive and naphthenic oil and lecithin was prepared. The formulation composition, initial viscosity of the slurry, yield value of the slurry after 5 hours, density of the explosive, and detonation velocity are shown in Table 2. Show.

[0037] Table 2 Formulation and properties of a HTPB-based pouring explosive with HMX as the main explosive

[0038]

[0039] The pouring explosive 2# formulation with 90% HMX solid content has an initial viscosity of 435Pa·s, a low yield value after 5 hours of slurry, excellent formulation process performance, and an explosive density of 1.71g / cm 3, explosive detonation velocity 8410m / s.

Embodiment 3

[0041] A HTPB-based pouring explosive formula with HMX as the main explosive and naphthenic oil and simethicone oil was prepared. The formula composition, initial viscosity of the slurry, yield value of the slurry after 5 hours, density of the explosive, detonation velocity and other basic properties as shown in Table 3.

[0042] Table 3 Formula and performance of a HTPB-based pouring explosive with HMX as the main explosive

[0043]

[0044] The solid content of the pouring explosive formula is as high as 91%. The technological performance of the slurry is maintained well, the initial viscosity is low, the pot life is more than 5 hours, the detonation velocity is 7280m / s, and the mechanical properties and storage performance of the explosive are good.

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Abstract

The invention provides a HTPB (hydroxy-terminated polybutadiene) based casting mixed explosive formula with improved process property. The HTPB based casting mixed explosive formula is a casting mixedexplosive formula which takes HTPB as a binder, and comprises main explosive, a HTPB binder, an oxidant, metal fuel, an anti-aging agent, a curing catalyst and a curing agent, and further comprises aplasticizer and a process aid; the plasticizer is naphthenic oil, and accounts for 3%-9% of the mixed explosive in percentage by mass; the process aid is mixed from one or two of liquid-state lecithin, dimethylsilicone and a stearate compound, and accounts for 0.1%-1% of the mixed explosive in percentage by mass. The plasticizer provided by the invention reduces viscosity of mixed explosive slurry, and is free of a plasticizer migration phenomenon; and the process acid can effectively moisten explosive crystals, so that surface coating of explosive particles by the binder is promoted and mobility of the explosive slurry is obviously improved, and moreover, the process acid does not need to be removed in a casting process, and mechanical properties of the explosive in the storage process are not affected.

Description

technical field [0001] The present invention generally relates to the field of military mixed explosives, in particular to an HTPB-based casting mixed explosive. Background technique [0002] Casting mixed explosive is a mixed explosive made of high-energy simple explosive as the main explosive, adding high polymer binder and curing agent. This kind of explosive has good safety performance and is not only insensitive to various stimuli such as bullets, flames and fragments. It has rubbery physical properties and extremely low modulus, but also has high detonation energy and good adaptability to the environment. [0003] Casting mixed explosives have many excellent properties. Through the selection and adjustment of main explosives, oxidizers, metal fuels, binders, and plasticizers, the energy, mechanical properties and safety performance of explosives can be greatly adjusted, and at the same time, they have good low vulnerability Destructive properties have become an import...

Claims

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Application Information

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IPC IPC(8): C06B25/34C06B23/00
CPCC06B23/00C06B25/34
Inventor 王鹏李忠友曹仕瑾熊伟强张天福陈中娥高扬
Owner HUBEI INST OF AEROSPACE CHEMOTECH
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