Sulfur-free nitrogen-free high-temperature-resistant environment-friendly firework propellant and preparation method thereof

An environmentally-friendly fireworks and high-temperature-resistant technology, which is applied in the preparation of high-temperature-resistant fireworks propellants, micro-smoke, no sulfur and nitrogen, sulfur-free and nitrogen-free high-temperature environment-friendly fireworks propellants and their preparation, anti-static fields, can solve product pollution Large size, high mechanical sensitivity, low safety, etc., to achieve the effect of no pollution to the environment, high safety, and convenient mass production

Inactive Publication Date: 2021-06-04
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the shortcomings of the current black powder used in fireworks and firecrackers, such as large smoke, large residues, large product pollution, high mechanical sensitivity, and low safety during production and transportation, and provide a sulfur-free, nitrogen-free, high-temperature resistant and environmentally friendly fireworks Propellant and its preparation method, the method adopts chemical modification, coating, powder mixing, granulation, drying and other processes, the process is simple and there is no special process requirement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A sulfur-free, nitrogen-free, high-temperature-resistant, environment-friendly fireworks propellant and a preparation method thereof, the specific steps are as follows:

[0024] (1) First modify and coat the metal powder

[0025] Surface modification: Weigh 3 parts of silane coupling agent KH-550 and add it to 50mL ethanol, stir for 0.5h, and under the protection of an inert atmosphere, disperse 8 parts of aluminum powder, 6 parts of zinc powder and 12 parts of copper powder in sequence Soak in the solution for 6 hours, filter and dry to obtain modified metal powder; wherein, the particle size of aluminum powder is 10 μm, the particle size of zinc powder is 10 μm, and the particle size of copper powder is 30 μm;

[0026] Coating: Weigh 2 parts of elastomer and add it to 50mL ethyl acetate, stir until completely dissolved, and disperse the above 26 parts of modified metal powder into the solution, stir for 2 hours at a speed of 200rpm / min to obtain elastomer coated metal...

Embodiment 2

[0032] A sulfur-free, nitrogen-free, high-temperature-resistant, environment-friendly fireworks propellant and a preparation method thereof, the specific steps are as follows:

[0033] (1) First modify and coat the metal powder

[0034] Surface modification: Weigh 1 part of silane coupling agent KH-550 and add it to 50 mL of ethanol, stir for 0.5 h, and under the protection of an inert atmosphere, disperse 10 parts of aluminum powder, 5 parts of zinc powder, and 20 parts of copper powder in sequence Soak in the solution for 6 hours, filter and dry to obtain modified metal powder; wherein, the particle size of aluminum powder is 10 μm, the particle size of zinc powder is 10 μm, and the particle size of copper powder is 10 μm;

[0035] Coating: Weigh 4 parts of elastomer and add it to 50mL ethyl acetate, stir until it is completely dissolved, and disperse the above 35 parts of modified metal powder into the solution, stir for 2 hours at a speed of 200rpm / min to obtain elastomer ...

Embodiment 3

[0041] A sulfur-free, nitrogen-free, high-temperature-resistant, environment-friendly fireworks propellant and a preparation method thereof, the specific steps are as follows:

[0042] (1) First modify and coat the metal powder

[0043] Surface modification: Weigh 2 parts of silane coupling agent KH-550 and add it to 50mL ethanol, stir for 0.5h, and under the protection of an inert atmosphere, disperse 22 parts of aluminum powder, 8 parts of zinc powder and 5 parts of copper powder in sequence Soak in the solution for 6 hours, filter and dry to obtain modified metal powder; wherein, the particle size of aluminum powder is 40 μm, the particle size of zinc powder is 10 μm, and the particle size of copper powder is 10 μm;

[0044] Coating: Weigh 5 parts of elastomer and add it to 50 mL of ethyl acetate, stir until completely dissolved, and disperse the above 35 parts of modified metal powder into the solution, stir for 2 hours at a speed of 200 rpm / min to obtain elastomer coated ...

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Abstract

The invention relates to a sulfur-free nitrogen-free high-temperature-resistant environment-friendly firework propellant and a preparation method thereof, and belongs to the technical field of fireworks and crackers. The sulfur-free micro-smoke high-temperature-resistant firework propellant is prepared from the following components in parts by weight: 55-75 parts of polytetrafluoroethylene with the particle size of 50-300 microns; 5-25 parts of aluminum powder with the particle size of 5-75 microns; 5-25 parts of zinc powder and 5-15 parts of copper powder with the particle size of 5-75 microns; 2-10 parts of calcium silicate with the particle size of 20-150 microns; 0.5-5 parts of a silane coupling agent; and 1-5 parts of an energetic binder. The preparation method adopts the processes of chemical modification, coating, powder mixing, granulation, drying and the like, and is simple in process, free of special process requirements, low in cost and convenient for batch production. The obtained product has the advantages of no sulfur, slight smoke, no environmental pollution, low impact or friction sensitivity, high temperature resistance, static resistance, high safety and the like, and can be widely applied to the production of propellant powder for fireworks and crackers.

Description

technical field [0001] The invention relates to a sulfur-free, nitrogen-free, high-temperature-resistant and environment-friendly fireworks propellant and a preparation method thereof, in particular to a preparation method of a sulfur-free, nitrogen-free, low-smoke, anti-static, and high-temperature-resistant fireworks propellant, which belongs to the technical field of fireworks and firecrackers. Background technique [0002] In the production of fireworks and firecrackers, black powder is one of the important raw materials. Black powder is a mixture of potassium nitrate (oxidant), charcoal (reductant) and sulfur (combustible). Its advantages are low price, safe operation and easy manufacture. But black gunpowder can produce a large amount of black smog when burning, influences the setting off effect of fireworks, and combustion is incomplete, there will be a large amount of oxides and solid residue of carbon, sulfur, potassium in the residue, serious environmental pollutio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B33/02C06B21/00
CPCC06B33/02C06B21/00C06B21/0066
Inventor 束庆海赵帅吕席卷吴启才
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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