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A kind of composite functional additive and its preparation method and application in propellant

A technology of functional additives and propellants, used in non-explosive fillers/gelling agents/thickeners, offensive equipment, explosives processing equipment, etc. The effect of reducing electrostatic spark sensitivity and electrostatic spark sensitivity

Active Publication Date: 2021-09-07
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding so much graphite detracts from the performance of energetic materials

Method used

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  • A kind of composite functional additive and its preparation method and application in propellant
  • A kind of composite functional additive and its preparation method and application in propellant
  • A kind of composite functional additive and its preparation method and application in propellant

Examples

Experimental program
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Effect test

preparation example Construction

[0046]A preparation method of a combined functional auxiliary, the steps are: dissolving CAB in acetone (dissolving in a mass ratio of 1:40) to prepare a solution, then adding BA to stir and dissolve to form a suspension to obtain a combined functional auxiliary.

[0047] A propellant containing a combination of functional additives, the propellant includes a binder system, an oxidizing agent, a metal fuel, a curing agent, a combined functional additive and other additives;

[0048] Taking the total mass of the propellant as 100%, the mass percentage of each component is:

[0049] Adhesive system 17%~25%

[0050] Oxidant 52%~65%

[0051] Metal fuel 15%~20%

[0052] Curing agent 0.5%~0.9%

[0053] Combination of functional additives 0.5% to 2%

[0054] Other additives 0.6%-0.85%

[0055] The adhesive system includes an adhesive and a plasticizer, wherein the adhesive is hydroxyl-terminated oxirane-tetrahydrofuran copolyether PET, polyethylene glycol PEG or polyazide glycid...

Embodiment 1

[0070] Propellant composition (based on the total mass of propellant as 100%, mass percent content)

[0071]

[0072] Wherein the above-mentioned combined functional auxiliary agent BA-1 comprises:

[0073]

[0074] Note ①: Percentage of total propellant mass, the same below.

[0075] The safety test results of the high-energy propellant billet prepared by adding BA-1 are shown in Table 1. It can be seen that compared with the blank, the electrostatic spark sensitivity of the propellant added with BA-1 is significantly reduced.

[0076] Table 1 Safety test results

[0077]

[0078] Note: The sensitivity of the propellant to the external stimulus is expressed by sensitivity. The greater the sensitivity, the more sensitive it is to the outside world, and it is easier to detonate. ①Indicates the static spark energy of 50% explosion under the excitation of static spark, the smaller the value, the higher the sensitivity. ② Indicates 50% of the critical impact energy. ...

Embodiment 2

[0083] Propellant composition (mass percent)

[0084]

[0085] Wherein the above-mentioned combined functional auxiliary agent BA-2 comprises:

[0086]

[0087] The electrostatic spark sensitivity of the high-energy propellant containing the above combined functional additives (BA-2 for short) is 138.3J, the impact sensitivity is 39.1J, and the friction sensitivity is 96%.

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Abstract

The invention relates to a combined functional additive and its preparation method and application, in particular to a combined functional additive for reducing the electrostatic sensitivity of NEPE propellants and a propellant containing the functional additive, belonging to the technical field of solid propellants. The invention solves the problem of high electrostatic sensitivity of the NEPE high-energy propellant, can significantly reduce the electrostatic sensitivity of the propellant, and also reduce the friction sensitivity and impact sensitivity of the propellant, significantly improve the safety performance of the high-energy propellant, and at the same time reduce the propellant's Process performance, mechanical properties and combustion performance have no obvious effect.

Description

technical field [0001] The present invention relates to a combined functional additive and its preparation method and application in propellants, in particular to a combined functional additive that reduces the electrostatic sensitivity of NEPE propellants and a propellant containing the functional additive, belonging to solid propellants technology field. Background technique [0002] Solid propellant is the main energy source of rockets and missiles in modern warfare. It is an energetic composite material composed of binder, oxidizer and metal fuel. The binder material of the propellant is a poor conductor with a resistivity of the order of 10 8 -10 12 Ω·m, due to the addition of aluminum powder and oxidant to the NEPE propellant, its volume resistivity is about 10 5 Ω·m, according to the classification of dielectric resistivity, high-energy propellants belong to semiconductor media with high resistivity. However, since the energy and safety sensitivity (including fric...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B33/06C06B23/00C06B21/00C06D5/00
CPCC06B21/0058C06B23/00C06B23/001C06B33/06C06D5/00
Inventor 王小英杨品高李伟唐泉刘雄钱勖代志高
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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