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Method for reducing the hygroscopicity of ammonium perchlorate

An ammonium perchlorate and hygroscopic technology, applied in ammonium perchlorate compositions, explosives, offensive equipment, etc., can solve problems such as spontaneous combustion, explosion, potential safety hazards of propellants, affecting AP quality, etc., and achieve reduced hygroscopicity, The effect of uniform coating and easy operation

Active Publication Date: 2021-07-06
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, AP has strong hygroscopicity and is an energetic material that is easy to absorb moisture. It is prone to moisture absorption during production, transportation, and storage. If AP absorbs moisture and agglomerates, it may cause many safety hazards to the transportation and storage of propellants and affect AP. Quality, prone to spontaneous combustion, explosion and other safety accidents

Method used

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  • Method for reducing the hygroscopicity of ammonium perchlorate
  • Method for reducing the hygroscopicity of ammonium perchlorate
  • Method for reducing the hygroscopicity of ammonium perchlorate

Examples

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Effect test

Embodiment 1

[0020] Weigh the raw materials AP: polyacrylate rubber: fluorine rubber according to the mass ratio of 97:2:1 and prepare for use. Measure 25ml of ethyl acetate, add polyacrylate rubber into ethyl acetate and soak for 24 hours, and magnetically stir for 1 hour to dissolve it completely. Weigh 5ml of ethyl acetate, add fluororubber into ethyl acetate and soak for 24h, and stir magnetically for 1h. Let it dissolve completely. Add the raw material AP to the ethyl acetate solution of polyacrylate rubber and fluororubber, and gently stir in the mortar until the ethyl acetate is completely volatilized. Pour the treated AP particles into a watch glass and put them into a constant temperature and humidity box. Air dry at 25°C, 20% humidity. That is, the processed AP particles are obtained.

Embodiment 2

[0022] Weigh the raw materials AP: polyacrylate rubber: fluorine rubber according to the mass ratio of 97:2:1 and prepare for use. Measure 25ml of ethyl acetate, add polyacrylate rubber into ethyl acetate and soak for 24 hours, and magnetically stir for 1 hour to dissolve it completely. Weigh 5ml of ethyl acetate, add fluororubber into ethyl acetate and soak for 24h, and stir magnetically for 1h. Let it dissolve completely. Add the raw material AP to the ethyl acetate solution of polyacrylate rubber and fluororubber, add 1ml of ethanol, and stir gently in a mortar until the ethyl acetate is completely volatilized. Pour the treated AP particles into a watch glass and put them into a constant temperature and humidity box. Air dry naturally at 25°C and 20% humidity. That is, the processed AP particles are obtained.

Embodiment 3

[0024] Weigh the raw materials AP: polyacrylate rubber: fluorine rubber according to the mass ratio of 97:2:1 and prepare for use. Measure 25ml of ethyl acetate, add polyacrylate rubber into ethyl acetate and soak for 24 hours, and magnetically stir for 1 hour to dissolve it completely. Weigh 5ml of ethyl acetate, add fluororubber into ethyl acetate and soak for 24h, and stir magnetically for 1h. Let it dissolve completely. Add the raw material AP to the ethyl acetate solution of polyacrylate rubber and fluororubber, add 1ml of deionized water, and gently stir in a mortar until the ethyl acetate is completely volatilized. Pour the treated AP particles into a watch glass and put them into a constant temperature and humidity box. Air dry naturally at 25°C and 20% humidity. That is, the processed AP particles are obtained.

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Abstract

The invention discloses a method for reducing the hygroscopicity of ammonium perchlorate. According to the method, the mass ratio of ammonium perchlorate, polyacrylate rubber and fluororubber is 96:3:1 to 98:1:1, ammonium perchlorate is added to the ethyl acetate solution of fluororubber, and the Slowly add the ethyl acetate solution of polyacrylate rubber dropwise, dry in the air, remove the ethyl acetate, and obtain ammonium perchlorate whose surface is covered with polyacrylate rubber and fluororubber. The invention adopts a coating method, uses polyacrylate as a coating material, and fluorine rubber as a crosslinking agent to coat AP. The operation method is simple, safe and reliable, and the obtained composite particles are evenly coated, and the hygroscopicity is obviously reduced.

Description

technical field [0001] The invention relates to a method for reducing the hygroscopicity of ammonium perchlorate (AP), and belongs to the technical field of energetic materials. [0002] technical background [0003] Composite particle material is a heterogeneous material made of two or more different types of particles through a certain process. Its performance is better than that of each individual component material, and in some respects it may have unique properties that the component material does not have. [0004] AP is a strong oxidant, commonly used in rocket propellants, has the advantages of no heavy metal ions, high thermal stability and chemical stability, etc., has long been used in composite solid propellants, modified double-base propellants and NEPE The main energy substance in propellants and the most commonly used oxidizer. Modified double-base propellants are widely used in tactical rocket and missile weapon systems. Due to the introduction of a large am...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B29/22C06B21/00C06B23/00
CPCC06B21/0083C06B23/009C06B29/22
Inventor 姜炜张哲郝嘎子李强雷红兵胡玉冰黎博李东楠邵方凡苏费彬徐志尧肖磊
Owner NANJING UNIV OF SCI & TECH
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