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Low-combustion-temperature-carrier-based pyrotechnic composition preparation method

A technology of pyrotechnic powder and carrier, which is applied in the field of composite energetic material preparation, can solve the problems of low decomposition temperature, loss of efficiency, decomposition, etc., and achieve the effects of high-efficiency low-temperature combustion system, increase of overall content, and easy flame temperature

Active Publication Date: 2017-09-12
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Take tear gas as an example, its main components CS and capsaicin need a lower temperature to sublimate into the air. For now, potassium chlorate has a lower decomposition temperature and is the most suitable oxidant in the pyrotechnic composition. In any case, The decomposition temperature of potassium chlorate is still well above the sublimation temperature of tear gas, and safety has become a very thorny issue
In addition, such as artificial rainfall agents, the main component of silver iodide is preferably directly sublimated into the air at the flame temperature, and the excessively high combustion temperature will inevitably cause decomposition and lose effectiveness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The first step is to make high-temperature combustion particles. Weigh the material (take the total dose of 100g as an example): Weigh 3g~15g of the material (such as phenolic resin) of the adhesive, pour it into 100ml~400ml of solvent (such as alcohol), the melting temperature is 20℃~90℃, wait until completely Dissolve or partially dissolve to prepare mixed glue → weigh oxidant (single or quantitative, 20g-60g, such as potassium nitrate), combustible agent (single or quantitative, 15g-60g, such as sucrose) → mix In the mixed glue of oxidant and combustible agent weighed, mix it uniformly by mechanical stirring, or ultrasound, or constant temperature in a water bath → mix the agent and spread it evenly, volatilize or evaporate the solvent → granulate → dry or dry; the second step , Bridge fire transfer function additive. Weigh the material (take the total dose of 100g as an example): Weigh 3g~15g of the material (such as nitrocellulose), pour it into 100ml~400ml solven...

Embodiment 2

[0026] The first step is to make high-temperature combustion particles. Weigh the material (take the total dose of 100g as an example): Weigh the oxidant (single or quantitative, 20g~60g, such as potassium nitrate): combustible agent (single or quantitative, 15g~60g, such as sucrose), Weigh 3g to 15g of adhesive material (such as phenolic resin) → spray with alcohol or acetone, sieve repeatedly, and mix evenly; the second step is the bridge fire transfer function additive. Weigh the material (take the total dose of 100g as an example): Weigh 3g-15g of the binder material (such as nitrocellulose), weigh the energetic material (single or quantitative, 3g-42g, such as 5-aminotetra azoles), functional additives (single or quantitative, 55g to 95g, such as capsaicin or CS) → spray with alcohol or acetone, sieve repeatedly, and mix evenly; the third step is to weigh the high-temperature combustion particles after drying 30g~98g of medicine, weigh 2g~70g of the additive with the fun...

Embodiment 3

[0028] The first step is to make high-temperature combustion particles. Weigh the material (take the total dose of 100g as an example): Weigh the oxidant (single or quantitative, 20g~60g, such as potassium nitrate): combustible agent (single or quantitative, 15g~60g, such as sucrose), Weigh 3g to 15g of adhesive material (such as phenolic resin) → spray with alcohol or acetone, sieve repeatedly, and mix evenly; the second step is the bridge fire transfer function additive. Weigh the material (take the total dose of 100g as an example): Weigh 3g-15g of the binder material (such as nitrocellulose), weigh the energetic material (single or quantitative, 3g-42g, such as 5-aminotetra azoles), functional additives (single or quantitative, 55g to 95g, such as capsaicin or CS) → spray with alcohol or acetone, sieve repeatedly, and mix evenly; the third step is to weigh the high-temperature combustion particles after drying 30g~98g of the agent, weigh 2g~70g of the additive for cross-b...

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PUM

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Abstract

The invention discloses a low-combustion-temperature-carrier-based pyrotechnic composition preparation method. According to the present invention, the oxidizing agent, the combustible agent and the binder in the existing pyrotechnic composition formula are subjected to separate and mixing granulation to form a large number of prefabricated high temperature combustion mass points, the functional additive is dispersed among the high temperature combustion mass points after the functional additive is cladded or embedded by an energetic material, the energetic material cladded functional additive can rapidly transfer fire during combustion, and can rapidly separate from the combustion interface and enter the flame during the intense combustion of the high temperature combustion mass points so as to form the low combustion temperature flame carrier; and with the preparation method, the functional additive can be directly carried to the flame zone, such that the flame temperature can be easily and ideally controlled.

Description

technical field [0001] The invention relates to a method for preparing a composite energetic material, in particular to a method for preparing pyrotechnic powder based on a carrier with a low combustion temperature. Background technique [0002] Different from simple explosives, general pyrotechnic powder is a composite energetic material of a semi-closed self-oxygen supply system mainly composed of oxidizer particles, combustible agent particles, binders, and functional additives. It is a porous combustion medium in which different materials are in close contact. . The functional additives in the pyrotechnic composition mainly include flame dyeing agents for coloring flames, speed regulators for accelerating or slowing the burning rate, stabilizers for enhancing physical and chemical stability, desensitizing agents for reducing mechanical sensitivity, and enhancing various pyrotechnics. effects of additives, etc. In addition, various functional additives need an appropria...

Claims

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Application Information

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IPC IPC(8): C06B21/00C06B31/24
CPCC06B21/0041C06B31/24
Inventor 朱晨光林红雪彭儒叶飞徐靖然
Owner NANJING UNIV OF SCI & TECH
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