CN113651660A - Preparation method of deoxidation type safe and environment-friendly firework propellant - Google Patents

Preparation method of deoxidation type safe and environment-friendly firework propellant Download PDF

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Publication number
CN113651660A
CN113651660A CN202110877871.1A CN202110877871A CN113651660A CN 113651660 A CN113651660 A CN 113651660A CN 202110877871 A CN202110877871 A CN 202110877871A CN 113651660 A CN113651660 A CN 113651660A
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China
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environment
powder
preparation
propellant
friendly firework
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CN202110877871.1A
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Chinese (zh)
Inventor
束庆海
吴启才
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Anhui Shidong Energy Technology Co ltd
Suzhou Guoshiyu New Material Technology Co ltd
Beijing Institute of Technology BIT
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Anhui Shidong Energy Technology Co ltd
Suzhou Guoshiyu New Material Technology Co ltd
Beijing Institute of Technology BIT
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Publication of CN113651660A publication Critical patent/CN113651660A/en
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    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B33/00—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide
    • C06B33/02—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide with an organic non-explosive or an organic non-thermic component
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
    • C06B21/0033—Shaping the mixture
    • C06B21/0066—Shaping the mixture by granulation, e.g. flaking

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Powder Metallurgy (AREA)
  • Medicinal Preparation (AREA)
  • Fireproofing Substances (AREA)
  • Glanulating (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

The invention discloses a preparation method of a deoxidation type safe and environment-friendly firework propellant, and belongs to the technical field of fireworks and crackers. The invention adopts conventional metal powder, high molecular fluoropolymer, binder and deoxidizer as raw materials; the preparation method adopts the processes of chemical modification, coating, powder mixing, granulation, drying and the like, has wide material source, controllable cost and simple preparation process, and is suitable for batch industrial production. The deoxidation type safe and environment-friendly firework propellant consists of a fluoropolymer-based safe and environment-friendly firework propellant basic formula and a deoxidizer. Through adding deoxidier functional component, effectively reduce the high temperature that the fluoropolymer base safety ring protects fireworks propellant powder reaction in-process produced to the combustion-supporting side effect of paper, when solving fireworks and setting off the problem of paper section of thick bamboo that burns of in-process, can also slow down the brisance of reaction, the noise reduction is to the pollution of environment. The invention can be widely applied to the propellant of fireworks and crackers.

Description

Preparation method of deoxidation type safe and environment-friendly firework propellant
Technical Field
The invention relates to a preparation method of a deoxidation type safe and environment-friendly firework propellant, belonging to the technical field of fireworks and crackers.
Background
Black powder is one of the important raw materials in the production of fireworks and crackers. Due to the huge hidden dangers of black powder in the aspects of environmental protection, safety and the like, the research and development of novel firework powder become a research hotspot. The high molecular fluorine polymer can generate violent self-maintaining oxidation reduction reaction with active metal, oxygen is not needed to participate, the raw material is free of sulfur and nitrogen, and the high molecular fluorine polymer has great potential in developing safe and environment-friendly firework propellant.
The comprehensive performance of the high molecular fluorine polymer based composite material is excellent, and especially the safety performance and the environmental protection performance of the high molecular fluorine polymer based composite material. The basic principle of the formula is that the violent oxidation-reduction reaction between the high molecular fluorine polymer and the active metal instantly releases high temperature of more than 3000 ℃ to the outside so as to perform expansion work on air. However, due to the high severity of the reaction, the propellant powder may burn the inner wall of the paper tube after the ignition reaction, and in some cases, the propellant powder may catch fire, which seriously affects the stability and reliability of the propellant powder. Aiming at the problems, on the basis of the fluoropolymer-based safe and environment-friendly fireworks, the development of the deoxidation type safe and environment-friendly firework propellant has very important significance.
Disclosure of Invention
The invention aims to provide a preparation method of a deoxidation type safe and environment-friendly firework propellant, which has the advantages of wide material source, controllable cost and simple preparation process and is suitable for batch industrial production. The product prepared by the invention has the advantages of safety and environmental protection of the fluoropolymer-based safe and environmental-friendly fireworks, and can also reduce the oxygen content in the physical space of the reaction system with high efficiency and low cost.
The purpose of the invention is realized by the following technical scheme.
The invention discloses a preparation method of a deoxidation type safe and environment-friendly firework propellant. Through adding deoxidier functional component, effectively reduce the high temperature that the fluoropolymer base safety ring protects fireworks propellant powder reaction in-process produced to the combustion-supporting side effect of paper, when solving fireworks and setting off the problem of paper section of thick bamboo that burns of in-process, can also slow down the brisance of reaction, the noise reduction is to the pollution of environment.
Wherein the fluoropolymer-based safe and environment-friendly firework propellant is prepared from 78-96 parts by weight of a basic formula and 4-22 parts by weight of a deoxidizer.
The invention discloses a preparation method of a deoxidation type safe and environment-friendly firework propellant, which mainly comprises the following steps:
the method comprises the following steps: adding a silane coupling agent into ethyl acetate, uniformly stirring, dispersing spherical active metal powder into a solution under the protection of inert atmosphere, soaking for a certain time, filtering and drying to obtain modified metal powder;
step two: adding the binder into ethyl acetate, stirring until the binder is completely dissolved, dispersing the modified metal powder obtained in the step one into the solution, and stirring for a certain time to obtain a dispersion liquid of the binder-coated metal powder;
step three: adding the high molecular fluoropolymer and a deoxidizing agent into the dispersion liquid obtained in the step two, and stirring for a certain time to obtain slurry;
step four: and E, extruding and granulating the slurry obtained in the step three through a granulator, and drying the granules to obtain the final product.
Preferably, the used fluoropolymer-based safe and environment-friendly firework basic formula consists of 30-75 parts of high-molecular fluoropolymer and 50-400 mu m of particle size; 25-70 parts of active metal powder, and the particle size is 10-75 mu m; 0.5-3 parts of a silane coupling agent; 0.5-5 parts of a binder.
Preferably, the deoxidizer is ferrosilicon powder, silicon powder, iron powder, copper powder or zinc powder.
Preferably, the high molecular weight fluoropolymer is perfluoropolyether, polyfluoroolefin, polyfluoroalkane, or the like.
Preferably, the active metal powder is spherical magnesium powder, spherical aluminum powder, spherical zinc powder and the like.
Has the advantages that:
1. the invention discloses a preparation method of a deoxidation type safe and environment-friendly firework propellant, which adopts conventional metal powder, high-molecular fluoropolymer, a binder and a deoxidizer as raw materials; the process of chemical modification, coating, powder mixing, granulation, drying and the like is adopted, the process is simple, no special process requirement exists, the cost is low, and the batch production is convenient.
2. The invention discloses a preparation method of a deoxidation type safe and environment-friendly firework propellant, which has the advantages of safety and environment protection of a fluoropolymer-based safe and environment-friendly firework.
Detailed Description
The present invention will be described in further detail with reference to specific examples, which are not intended to limit the present invention in any manner. Unless otherwise indicated, the various starting materials used in the examples of the present invention are either conventionally available commercially or prepared according to conventional methods in the art using equipment commonly used in the laboratory. Unless defined or stated otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
Example 1
A preparation method of a deoxidation type safe and environment-friendly firework propellant comprises the following specific steps:
(1) modified coating
Surface modification: adding 1 part of silane coupling agent KH550 into ethyl acetate, stirring for 0.5h, dispersing 24 parts of spherical magnesium powder and 10 parts of spherical aluminum powder into a solution under the protection of inert atmosphere, soaking for 6h, filtering and drying to obtain modified metal powder; wherein the particle size of the active metal powder is 10 μm.
Coating: adding 2 parts of polyurethane elastomer (with the molecular weight of 1000-3000) into ethyl acetate, stirring until the polyurethane elastomer is completely dissolved, dispersing the modified metal powder into the solution, and stirring for 2 hours to obtain a dispersion liquid of the binder-coated metal powder.
(2) Preparation by molding
Mixing powder: adding 61 parts of polytetrafluoroethylene micro powder and 4 parts of deoxidizer iron powder into the dispersion liquid obtained by coating the metal powder with the binder, and stirring for 4 hours to obtain slurry;
and (3) granulation: and extruding and granulating the obtained slurry through a granulator with a particle plate of 2mm, and drying the obtained particles at the drying temperature of 60 ℃ to obtain the final product.
3g of the propellant powder product prepared by the method is placed in a firework launching paper tube with the diameter of 14 mm, and ground launching test results show that the launching inner tube is intact and has no ablation phenomenon, and the effective inhibition of the paper tube on the ignition phenomenon easily caused by the deoxidizer under the high-temperature condition is reflected.
Example 2
A preparation method of a deoxidation type safe and environment-friendly firework propellant comprises the following specific steps:
(1) modified coating
Surface modification: adding 1 part of silane coupling agent KH560 into ethyl acetate, stirring for 0.5h, dispersing 20 parts of spherical magnesium powder and 10 parts of spherical aluminum powder into the solution under the protection of inert atmosphere, soaking for 6h, filtering and drying to obtain modified metal powder; wherein the particle size of the active metal powder is 10 μm.
Coating: adding 2 parts of polyurethane elastomer (with the molecular weight of 1000-3000) into ethyl acetate, stirring until the polyurethane elastomer is completely dissolved, dispersing the modified metal powder into the solution, and stirring for 2 hours to obtain a dispersion liquid of the binder-coated metal powder.
(2) Preparation by molding
Mixing powder: adding 60 parts of polytetrafluoroethylene and 7 parts of deoxidizer ferrosilicon powder into the dispersion liquid obtained by coating the metal powder with the binder, and stirring for 4 hours to obtain slurry;
and (3) granulation: and extruding and granulating the obtained slurry through a granulator with a particle plate of 2mm, and drying the obtained particles at the drying temperature of 60 ℃ to obtain the final product.
3g of the propellant powder product prepared by the method is placed in a firework launching paper tube with the diameter of 14 mm, and ground launching test results show that the launching inner tube is intact and has no ablation phenomenon, and the effective inhibition of the paper tube on the ignition phenomenon easily caused by the deoxidizer under the high-temperature condition is reflected.
Example 3
A preparation method of a deoxidation type safe and environment-friendly firework propellant comprises the following specific steps:
(1) modified coating
Surface modification: adding 1 part of silane coupling agent into ethyl acetate, stirring for 0.5h, dispersing 10 parts of spherical magnesium powder and 10 parts of spherical aluminum powder into a solution under the protection of inert atmosphere, soaking for 6h, filtering and drying to obtain modified metal powder; wherein the particle size of the active metal powder is 10 μm;
coating: adding 2 parts of adhesive fluororubber 2311 into ethyl acetate, stirring until the fluororubber is completely dissolved, dispersing the modified metal powder into the solution, and stirring for 2 hours to obtain an adhesive-coated metal powder dispersion liquid.
(2) Preparation by molding
Mixing powder: adding 65 parts of polytetrafluoroethylene and 12 parts of silicon deoxidizer powder into the dispersion liquid obtained by coating the metal powder with the binder, and stirring for 4 hours to obtain slurry;
and (3) granulation: and extruding and granulating the obtained slurry through a granulator with a particle plate of 2mm, and drying the obtained particles at the drying temperature of 60 ℃ to obtain the final product.
3g of the propellant powder product prepared by the method is placed in a firework launching paper tube with the diameter of 14 mm, and ground launching test results show that the launching inner tube is intact and has no ablation phenomenon, and the effective inhibition of the paper tube on the ignition phenomenon easily caused by the deoxidizer under the high-temperature condition is reflected.
The above detailed description is intended to illustrate the objects, aspects and advantages of the present invention, and it should be understood that the above detailed description is only exemplary of the present invention and is not intended to limit the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (5)

1. A preparation method of a deoxidation type safe and environment-friendly firework propellant is characterized by comprising the following steps: the deoxidation type safe and environment-friendly firework propellant consists of a fluoropolymer-based safe and environment-friendly firework propellant basic formula and a deoxidizer; the mass ratio of the basic formula to the deoxidizer is 78: 22-96: 4. By adding the functional component of the deoxidizer, the combustion-supporting side effect of high temperature generated in the reaction process of the fluoropolymer-based safe and environment-friendly firework propellant on paper is effectively reduced, the problem of paper tube burning in the firework setting-off process is solved, the reaction violence can be slowed down, and the pollution of noise to the environment is reduced;
the method mainly comprises the following steps:
the method comprises the following steps: adding a silane coupling agent into ethyl acetate, uniformly stirring, dispersing spherical active metal powder into a solution under the protection of inert atmosphere, soaking for a certain time, filtering and drying to obtain modified metal powder;
step two: adding the binder into ethyl acetate, stirring until the binder is completely dissolved, dispersing the modified metal powder obtained in the step one into the solution, and stirring for a certain time to obtain a dispersion liquid of the binder-coated metal powder;
step three: adding the high molecular fluoropolymer and a deoxidizing agent into the dispersion liquid obtained in the step two, and stirring for a certain time to obtain slurry;
step four: and E, extruding and granulating the slurry obtained in the step three through a granulator, and drying the granules to obtain the final product.
2. The preparation method of the deoxidation type safe and environment-friendly firework propellant as claimed in claim 1, wherein the preparation method comprises the following steps: the fluoropolymer-based safe and environment-friendly firework propellant comprises the following basic formula: 30-75 parts of high-molecular fluorine polymer with the particle size of 50-400 mu m; 25-70 parts of active metal powder, and the particle size is 10-75 mu m; 0.5-3 parts of a silane coupling agent; 0.5-5 parts of a binder.
3. The preparation method of the deoxidation type safe and environment-friendly firework propellant as claimed in claim 1 or 2, wherein the preparation method comprises the following steps: the high molecular fluorine polymer is perfluoropolyether, polyfluoroolefin and polyfluoroalkane.
4. The preparation method of the deoxidation type safe and environment-friendly firework propellant as claimed in claim 1 or 2, wherein the preparation method comprises the following steps: the active metal powder is spherical magnesium powder, spherical aluminum powder and spherical zinc powder.
5. The preparation method of the deoxidation type safe and environment-friendly firework propellant as claimed in claim 1 or 2, wherein the preparation method comprises the following steps: the deoxidizer is ferrosilicon powder, silicon powder, iron powder, copper powder or zinc powder.
CN202110877871.1A 2021-02-09 2021-07-28 Preparation method of deoxidation type safe and environment-friendly firework propellant Pending CN113651660A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110179212.0A CN112898105A (en) 2021-02-09 2021-02-09 Sulfur-free nitrogen-free high-temperature-resistant environment-friendly firework propellant and preparation method thereof
CN2021101792120 2021-02-09

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CN202110179212.0A Withdrawn CN112898105A (en) 2021-02-09 2021-02-09 Sulfur-free nitrogen-free high-temperature-resistant environment-friendly firework propellant and preparation method thereof
CN202110860606.2A Pending CN113582787A (en) 2021-02-09 2021-07-28 Preparation method of safe and environment-friendly firework propellant based on self-sustaining reaction
CN202110867670.3A Pending CN113880678A (en) 2021-02-09 2021-07-28 Preparation method of high-detonation-volume range-extending safe and environment-friendly firework propellant
CN202110860607.7A Pending CN113880676A (en) 2021-02-09 2021-07-28 High-molecular fluorine polymer-based safe and environment-friendly firework propellant
CN202211423398.0A Pending CN115716770A (en) 2021-02-09 2021-07-28 High-detonation-volume type range-extending safe and environment-friendly firework propellant
CN202110867654.4A Pending CN113735667A (en) 2021-02-09 2021-07-28 Low-cost safe and environment-friendly firework propellant preparation method based on self-sustaining reaction
CN202110854829.8A Pending CN113956118A (en) 2021-02-09 2021-07-28 Preparation method of low-burning-speed safe and environment-friendly firework propellant
CN202110854846.1A Pending CN113698263A (en) 2021-02-09 2021-07-28 Preparation method of low-cost combustion improver for safe and environment-friendly fireworks
CN202110854831.5A Pending CN113698261A (en) 2021-02-09 2021-07-28 High-detonation-volume type range-extending safe and environment-friendly firework propellant
CN202211418438.2A Pending CN115650810A (en) 2021-02-09 2021-07-28 Dust-reducing safe environment-friendly firework propellant and preparation method thereof
CN202110854840.4A Pending CN113698262A (en) 2021-02-09 2021-07-28 Preparation method of high-detonation-heat-type range-extending safe and environment-friendly firework propellant
CN202110860694.6A Pending CN113582789A (en) 2021-02-09 2021-07-28 Safe and environment-friendly firework propellant based on self-sustaining reaction
CN202110854854.6A Pending CN113912467A (en) 2021-02-09 2021-07-28 Low-cost safe and environment-friendly firework propellant based on self-sustaining reaction
CN202110854853.1A Pending CN113698265A (en) 2021-02-09 2021-07-28 Adhesive based on self-sustaining reaction safe and environment-friendly firework propellant
CN202110867669.0A Pending CN113880677A (en) 2021-02-09 2021-07-28 Low-burning-rate safe and environment-friendly firework propellant
CN202110877871.1A Pending CN113651660A (en) 2021-02-09 2021-07-28 Preparation method of deoxidation type safe and environment-friendly firework propellant
CN202110854852.7A Pending CN113956119A (en) 2021-02-09 2021-07-28 High-detonation-heat-type range-extending safe and environment-friendly firework propellant
CN202211423369.4A Pending CN115819163A (en) 2021-02-09 2021-07-28 Preparation method of high-detonation-heat-type range-extending safe and environment-friendly firework propellant
CN202110854819.4A Pending CN113698260A (en) 2021-02-09 2021-07-28 Low-cost combustion improver-based safe and environment-friendly firework propellant
CN202211382850.3A Pending CN115819162A (en) 2021-02-09 2021-07-28 Preparation method of safe and environment-friendly firework propellant based on self-sustaining reaction
CN202110860603.9A Pending CN113582786A (en) 2021-02-09 2021-07-28 Preparation method of high-fluidity fluoropolymer-based safe and environment-friendly firework propellant
CN202110854820.7A Pending CN113956117A (en) 2021-02-09 2021-07-28 High-fluidity fluoropolymer-based safe and environment-friendly firework propellant
CN202110860609.6A Pending CN113582788A (en) 2021-02-09 2021-07-28 Preparation method of dust-reducing safe and environment-friendly firework propellant
CN202211418452.2A Pending CN115784820A (en) 2021-02-09 2021-07-28 Low-cost combustion improver-based safe and environment-friendly firework propellant and preparation method thereof
CN202110867642.1A Pending CN113979818A (en) 2021-02-09 2021-07-28 Deoxidation type safe environment-friendly firework propellant
CN202110854847.6A Pending CN113880675A (en) 2021-02-09 2021-07-28 Preparation method of low-cost combustion improver-based safe and environment-friendly firework propellant
CN202110854851.2A Pending CN113698264A (en) 2021-02-09 2021-07-28 Dust-reducing safe environment-friendly firework propellant

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CN202110179212.0A Withdrawn CN112898105A (en) 2021-02-09 2021-02-09 Sulfur-free nitrogen-free high-temperature-resistant environment-friendly firework propellant and preparation method thereof
CN202110860606.2A Pending CN113582787A (en) 2021-02-09 2021-07-28 Preparation method of safe and environment-friendly firework propellant based on self-sustaining reaction
CN202110867670.3A Pending CN113880678A (en) 2021-02-09 2021-07-28 Preparation method of high-detonation-volume range-extending safe and environment-friendly firework propellant
CN202110860607.7A Pending CN113880676A (en) 2021-02-09 2021-07-28 High-molecular fluorine polymer-based safe and environment-friendly firework propellant
CN202211423398.0A Pending CN115716770A (en) 2021-02-09 2021-07-28 High-detonation-volume type range-extending safe and environment-friendly firework propellant
CN202110867654.4A Pending CN113735667A (en) 2021-02-09 2021-07-28 Low-cost safe and environment-friendly firework propellant preparation method based on self-sustaining reaction
CN202110854829.8A Pending CN113956118A (en) 2021-02-09 2021-07-28 Preparation method of low-burning-speed safe and environment-friendly firework propellant
CN202110854846.1A Pending CN113698263A (en) 2021-02-09 2021-07-28 Preparation method of low-cost combustion improver for safe and environment-friendly fireworks
CN202110854831.5A Pending CN113698261A (en) 2021-02-09 2021-07-28 High-detonation-volume type range-extending safe and environment-friendly firework propellant
CN202211418438.2A Pending CN115650810A (en) 2021-02-09 2021-07-28 Dust-reducing safe environment-friendly firework propellant and preparation method thereof
CN202110854840.4A Pending CN113698262A (en) 2021-02-09 2021-07-28 Preparation method of high-detonation-heat-type range-extending safe and environment-friendly firework propellant
CN202110860694.6A Pending CN113582789A (en) 2021-02-09 2021-07-28 Safe and environment-friendly firework propellant based on self-sustaining reaction
CN202110854854.6A Pending CN113912467A (en) 2021-02-09 2021-07-28 Low-cost safe and environment-friendly firework propellant based on self-sustaining reaction
CN202110854853.1A Pending CN113698265A (en) 2021-02-09 2021-07-28 Adhesive based on self-sustaining reaction safe and environment-friendly firework propellant
CN202110867669.0A Pending CN113880677A (en) 2021-02-09 2021-07-28 Low-burning-rate safe and environment-friendly firework propellant

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CN202110854852.7A Pending CN113956119A (en) 2021-02-09 2021-07-28 High-detonation-heat-type range-extending safe and environment-friendly firework propellant
CN202211423369.4A Pending CN115819163A (en) 2021-02-09 2021-07-28 Preparation method of high-detonation-heat-type range-extending safe and environment-friendly firework propellant
CN202110854819.4A Pending CN113698260A (en) 2021-02-09 2021-07-28 Low-cost combustion improver-based safe and environment-friendly firework propellant
CN202211382850.3A Pending CN115819162A (en) 2021-02-09 2021-07-28 Preparation method of safe and environment-friendly firework propellant based on self-sustaining reaction
CN202110860603.9A Pending CN113582786A (en) 2021-02-09 2021-07-28 Preparation method of high-fluidity fluoropolymer-based safe and environment-friendly firework propellant
CN202110854820.7A Pending CN113956117A (en) 2021-02-09 2021-07-28 High-fluidity fluoropolymer-based safe and environment-friendly firework propellant
CN202110860609.6A Pending CN113582788A (en) 2021-02-09 2021-07-28 Preparation method of dust-reducing safe and environment-friendly firework propellant
CN202211418452.2A Pending CN115784820A (en) 2021-02-09 2021-07-28 Low-cost combustion improver-based safe and environment-friendly firework propellant and preparation method thereof
CN202110867642.1A Pending CN113979818A (en) 2021-02-09 2021-07-28 Deoxidation type safe environment-friendly firework propellant
CN202110854847.6A Pending CN113880675A (en) 2021-02-09 2021-07-28 Preparation method of low-cost combustion improver-based safe and environment-friendly firework propellant
CN202110854851.2A Pending CN113698264A (en) 2021-02-09 2021-07-28 Dust-reducing safe environment-friendly firework propellant

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