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Preparation method of high-free-flowing-property fluorine polymer-based safe environment-friendly firework propellant

A fluoropolymer-based, safe and environmentally friendly technology, applied in explosives processing equipment, explosives, offensive equipment, etc., can solve the problems affecting the fluidity of powders, the difficulty of propellant powder forming and granulation, etc., and achieve low mechanical sensitivity, Improve safety performance and reliability, and reduce noise pollution

Pending Publication Date: 2021-11-02
BEIJING INSTITUTE OF TECHNOLOGYGY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the polymer fluoropolymer used in its formula has strong plasticity and cohesiveness, it seriously affects the fluidity of the powder and increases the difficulty of forming and granulating the propellant.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for preparing high-fluidity fluoropolymer-based safe and environment-friendly fireworks propellant, the specific steps are as follows:

[0022] (1) Surface modification: Add 1 part of silane coupling agent KH550 into ethyl acetate, stir for 0.5 h, and under the protection of an inert atmosphere, disperse 30 parts of spherical magnesium powder and 20 parts of spherical aluminum powder into the solution, Soak for 6 hours, filter and dry to obtain modified metal powder; wherein the particle size of the spherical metal is 10 μm.

[0023] Coating: Add 2 parts of Estane5702 into ethyl acetate, stir until completely dissolved, and disperse the above-mentioned modified metal powder into the solution, and stir for 2 hours to obtain a dispersion of binder-coated metal powder.

[0024] (2) Molding preparation

[0025] Powder mixing: Add 40 parts of polytetrafluoroethylene micropowder and 7 parts of dispersant spherical graphite to the dispersion obtained from the above-m...

Embodiment 2

[0030] A method for preparing high-fluidity fluoropolymer-based safe and environment-friendly fireworks propellant, the specific steps are as follows:

[0031] Surface modification: Add 1 part of silane coupling agent KH570 into ethyl acetate, stir for 0.5h, and under the protection of an inert atmosphere, disperse 10 parts of spherical magnesium powder and 20 parts of spherical aluminum powder into the solution, soak for 6 hours, Filter and dry to obtain modified metal powder; wherein the particle size of the spherical metal is 10 μm;

[0032] Coating: Add 2 parts of the binder Estane5702 into ethyl acetate, stir until completely dissolved, and disperse the above-mentioned modified metal powder into the solution, and stir for 2 hours to obtain a dispersion of the binder-coated metal powder.

[0033] (2) Molding preparation

[0034] Powder mixing: Add 47 parts of polytetrafluoroethylene micropowder and 10 parts of spherical glass beads of dispersion agent to the dispersion ob...

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Abstract

The invention discloses a preparation method of a high-free-flowing-property fluorine polymer-based novel safe environment-friendly firework propellant, and belongs to the technical field of fireworks and crackers. The preparation method mainly comprises the following steps: 1, carrying out chemical modification, coating, powder mixing, drying and other processes to obtain a basic formula A of a fluorine polymer / active metal powder formula propellant; and 2, adding the basic formula propellant A into a free-flowing agent, and carrying out powder mixing and granulation processes to obtain a final product. The prepared product is composed of a fluorine polymer based safe and environment-friendly firework propellant basic formula and the free-flowing agent and has the advantages of being safe and environment-friendly of fluorine polymer based safe and environment-friendly fireworks, by adding the free-flowing agent, the processing performance of agent granulation is improved, meanwhile, the safety performance and reliability of agents are further improved, the brisance of a reaction system is relieved, and the noise pollution to the environment after the propellant powder reacts can be reduced. The method can be widely applied to production of propellants for fireworks and crackers.

Description

technical field [0001] The invention relates to a preparation method of a high-fluidity fluoropolymer-based safe and environment-friendly fireworks propellant, belonging 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. Due to the huge hidden dangers of black powder in terms of environmental protection and safety, the research and development of new fireworks agents has become a research hotspot. Because high molecular fluoropolymers can undergo violent self-sustaining redox reactions with active metals without the participation of oxygen, and the raw materials are sulfur-free and nitrogen-free, they have great potential in the development of safe and environmentally friendly fireworks propellants. [0003] Although the comprehensive performance of polymer fluoropolymer-based composite materials is very excellent, especially its safety perfo...

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 束庆海吴启才
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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