CN113461466A - Fluoropolymer-based micro-smoke safe and environment-friendly firework blasting powder and preparation method thereof - Google Patents
Fluoropolymer-based micro-smoke safe and environment-friendly firework blasting powder and preparation method thereof Download PDFInfo
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- CN113461466A CN113461466A CN202110823539.7A CN202110823539A CN113461466A CN 113461466 A CN113461466 A CN 113461466A CN 202110823539 A CN202110823539 A CN 202110823539A CN 113461466 A CN113461466 A CN 113461466A
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- 239000000779 smoke Substances 0.000 title claims abstract description 19
- 229920002313 fluoropolymer Polymers 0.000 title claims abstract description 17
- 239000004811 fluoropolymer Substances 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000005422 blasting Methods 0.000 title claims abstract description 10
- 239000000843 powder Substances 0.000 title abstract description 30
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 33
- 239000002245 particle Substances 0.000 claims abstract description 22
- 238000004880 explosion Methods 0.000 claims abstract description 16
- 239000011230 binding agent Substances 0.000 claims abstract description 15
- 239000000428 dust Substances 0.000 claims abstract description 15
- 229920000642 polymer Polymers 0.000 claims abstract description 15
- 239000002360 explosive Substances 0.000 claims abstract description 13
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000002131 composite material Substances 0.000 claims abstract description 4
- 239000000853 adhesive Substances 0.000 claims abstract description 3
- 230000001070 adhesive effect Effects 0.000 claims abstract description 3
- -1 explosion promoter Substances 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims description 13
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 11
- 239000002002 slurry Substances 0.000 claims description 8
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000006185 dispersion Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 239000012467 final product Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 2
- 229920006217 cellulose acetate butyrate Polymers 0.000 claims description 2
- XOYUVEPYBYHIFZ-UHFFFAOYSA-L diperchloryloxylead Chemical compound [Pb+2].[O-]Cl(=O)(=O)=O.[O-]Cl(=O)(=O)=O XOYUVEPYBYHIFZ-UHFFFAOYSA-L 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 229920001973 fluoroelastomer Polymers 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims description 2
- 229920001568 phenolic resin Polymers 0.000 claims description 2
- 239000005011 phenolic resin Substances 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 229920003225 polyurethane elastomer Polymers 0.000 claims description 2
- VKJKEPKFPUWCAS-UHFFFAOYSA-M potassium chlorate Chemical compound [K+].[O-]Cl(=O)=O VKJKEPKFPUWCAS-UHFFFAOYSA-M 0.000 claims description 2
- 239000012286 potassium permanganate Substances 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 235000012239 silicon dioxide Nutrition 0.000 claims description 2
- 229920002379 silicone rubber Polymers 0.000 claims description 2
- 238000005262 decarbonization Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000035945 sensitivity Effects 0.000 abstract description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052717 sulfur Inorganic materials 0.000 abstract description 6
- 239000011593 sulfur Substances 0.000 abstract description 6
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 235000010333 potassium nitrate Nutrition 0.000 abstract description 2
- 239000004323 potassium nitrate Substances 0.000 abstract description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 239000002033 PVDF binder Substances 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical group [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052700 potassium Chemical group 0.000 description 1
- 239000011591 potassium Chemical group 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000007787 solid Chemical group 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B29/00—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate
- C06B29/02—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate of an alkali metal
- C06B29/08—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate of an alkali metal 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
- C06B21/0008—Compounding the ingredient
- C06B21/0025—Compounding the ingredient the ingredient being a polymer bonded explosive or 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
- C06B21/0033—Shaping the mixture
- C06B21/0066—Shaping the mixture by granulation, e.g. flaking
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B29/00—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a fluoropolymer-based micro-smoke safe and environment-friendly firework blasting explosive and a preparation method thereof, wherein the preparation method comprises the following steps: high molecular fluorine polymer, active reducing agent, explosion promoter, adhesive and dust reducing agent. The composite material consists of the following components in parts by weight and particle size: 20-75 parts of high-molecular fluorine polymer with the particle size of 50-400 mu m; 8-47 parts of active reducing agent, and the particle size is 10-75 mu m; 5-35 parts of an explosion promoter, and the particle size is 10-120 mu m; 0.5-15 parts of dust reducing agent; 0.5-5 parts of a binder. The invention has the advantages that: the components of the traditional black powder, such as potassium nitrate, sulfur and the like which are extremely harmful to the environment and have higher sensitivity are banned. The obtained product has the advantages of no sulfur, no nitrogen, little smoke, environmental protection, low mechanical sensitivity, high safety and the like, and can be widely applied to the production of the explosive for fireworks and crackers.
Description
Technical Field
The invention relates to the technical field of firework and firecracker production, in particular to a fluoropolymer-based micro-smoke safe and environment-friendly firework blasting powder and a preparation method thereof.
Background
Black powder is one of the important raw materials in the production of fireworks and crackers. The black powder is made up by mixing three components of potassium nitrate (oxidant), charcoal (reductant) and sulfur (combustible), and has the advantages of low cost, safe operation and convenient production. However, the black powder can generate a large amount of black smoke during combustion, which affects the setting off effect of fireworks, and the combustion is incomplete, and the residue contains a large amount of oxides of carbon, sulfur and potassium and solid residues, which seriously pollutes the environment. In the aspect of safety, the black powder has high mechanical sensitivity, and can be ignited or exploded when being subjected to strong impact or friction, so that the safety is low in the production and transportation processes, and great danger is brought to lives and properties of people.
The high molecular fluorine polymer has good thermal stability (the decomposition temperature is generally above 400 ℃), ageing resistance and chemical stability, compared with the heat of formation of fluoride generated by the reaction of metal powder, the oxide is large, and a large amount of heat can be released (the explosion heat can reach 2150 kcal/kg). Meanwhile, the high molecular fluorine polymer has good compatibility with substances such as common combustible agents and additives of pyrotechnic compositions, has excellent long-term storage performance, and has good formability when applied to energetic materials such as pyrotechnic compositions. In addition, the combustion products of the high molecular fluorine polymer/active metal powder are carbon and fluoride particles, toxic and harmful gases such as sulfur oxide, nitrogen oxide and the like are not generated, and the method is environment-friendly. In terms of safety, the high molecular fluoropolymer/active metal powder exhibits a marked bluntness to mechanical impact and thermal action, and is therefore highly safe during production and transportation. Based on the subversive advantages, the high molecular fluorine polymer/active metal powder can be applied to the production of fireworks and crackers and is expected to completely replace black powder.
The basic principle of the high-molecular fluorine polymer-based safe and environment-friendly explosive is that severe oxidation-reduction reaction between the high-molecular fluorine polymer and active metal instantly releases high temperature of more than 3000 ℃ to the outside so as to perform expansion work on air. The by-products of the reaction can also form a certain amount of carbon powder, which affects the visual effect of the firework setting off on one hand and causes particle emission to a certain degree on the other hand. Aiming at the problems, the development of the safe and environment-friendly firework blasting medicine with the carbon reduction design has very important significance.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a fluoropolymer-based micro-smoke safe and environment-friendly firework blasting powder and a preparation method thereof.
In order to realize the purpose, the technical scheme adopted by the invention is as follows:
a high molecular fluoropolymer-based micro-smoke safe and environment-friendly firework blasting explosive comprises: high molecular fluorine polymer, active reducing agent, explosion promoter, adhesive and dust reducing agent.
The composite material consists of the following components in parts by weight and particle size:
20-75 parts of high-molecular fluorine polymer with the particle size of 50-400 mu m; 8-47 parts of active reducing agent, and the particle size is 10-75 mu m; 5-35 parts of an explosion promoter, and the particle size is 10-120 mu m; 0.5-15 parts of dust reducing agent; 0.5-5 parts of a binder.
Preferably, the dust reducer is a high-boiling-point decarbonized oxide, specifically: silicon dioxide or manganese dioxide.
Preferably, the binder is: one of fluororubber, polyurethane elastomer, cellulose acetate butyrate, silicon rubber, phenolic resin and epoxy resin.
Preferably, the explosion promoters are: one of lead perchlorate, potassium chlorate and potassium permanganate.
The invention also discloses a preparation method of the fluoropolymer-based micro-smoke safe and environment-friendly firework explosive, which comprises the following steps:
the method comprises the following steps: adding the binder into ethyl acetate, uniformly stirring, dispersing the active reducing agent into the solution under the protection of inert atmosphere, soaking for 2 hours, filtering and drying to obtain the binder-coated active reducing agent;
step two: adding the high molecular fluorine polymer, the explosion promoter and the dust reducer into the dispersion liquid obtained in the step one, and uniformly stirring to obtain slurry;
step three: and E, extruding and granulating the slurry obtained in the step II through a granulator, and drying the granules to obtain the final product.
Preferably, the stirring time in the first step and the second step is 1-6 h, and the stirring speed is 100-200 rpm/min.
Preferably, the soaking time in the step one is 1-3 h.
Compared with the prior art, the invention has the advantages that:
1. the high-molecular fluorine polymer, the active reducing agent, the dust reducing agent and the explosion promoter are used as raw materials, are all common chemical reagents, are wide and easily available in sources, can be prepared by adopting simple powder mixing, stirring, granulating and drying processes, are suitable for industrial batch production, and are safe and controllable in process.
2. The composite powder can be used for replacing the traditional black powder, has the advantages of no sulfur, no nitrogen, little smoke, environmental friendliness, low mechanical sensitivity, high safety and the like, and can be widely applied to the production of the propellant for fireworks and crackers.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail by referring to the following examples.
Example 1
A preparation method of a fluoropolymer-based micro-smoke safe and environment-friendly firework blasting powder comprises the following specific steps:
(1) dispersed coating
Surface modification: weighing 1 part of binder, adding the binder into ethyl acetate, stirring for 0.5h, dispersing 50 parts of active reducing agent into the solution under the protection of inert atmosphere, soaking for 2h, filtering and drying; wherein the active reducing agent is spherical and has a particle size of 10 μm;
(2) mixing powder and granulating
Mixing powder: weighing 50 parts of polyvinylidene fluoride powder, an explosion promoter and a dust reducer, adding the polyvinylidene fluoride powder, the explosion promoter and the dust reducer into the dispersion liquid obtained by coating the reducing agent with the binder, and stirring for 4 hours to obtain slurry; wherein the particle size of the polyvinylidene fluoride powder is 160 mu m;
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.
Example 2
A preparation method of a fluoropolymer-based micro-smoke safe and environment-friendly firework blasting powder comprises the following specific steps:
(1) dispersed coating
Surface modification: weighing 1 part of binder, adding the binder into ethyl acetate, stirring for 0.5h, dispersing 20 parts of active reducing agent into the solution under the protection of inert atmosphere, soaking for 2h, filtering and drying; wherein the active reducing agent is spherical and has a particle size of 10 μm;
(2) mixing powder and granulating
Mixing powder: weighing 80 parts of polyvinylidene fluoride powder, an explosion promoter and a dust reducer, namely manganese dioxide, adding the polyvinylidene fluoride powder, the explosion promoter and the dust reducer into a dispersion liquid obtained by coating a reducing agent with the binder, and stirring for 4 hours to obtain slurry; wherein the particle size of the polyvinylidene fluoride powder is 160 mu m;
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.
According to the GJB 772A-1997 mechanical sensitivity testing method, a 10Kg drop hammer with a drop height of 25cm is adopted to carry out sampling detection on firework explosive samples prepared from a plurality of batches.
The impact sensitivity and the friction sensitivity of the product prepared by the invention are both 0% and 0%, and compared with the traditional black powder (the mechanical sensitivity is more than 30%), the safety performance is improved. In addition, the formula composition does not contain elements such as sulfur, nitrogen and the like, the reaction product avoids the generation of nitrogen oxide and sulfur oxide, and the problem of air pollution caused by the firework composition is fundamentally solved.
It will be appreciated by those of ordinary skill in the art that the examples described herein are intended to assist the reader in understanding the manner in which the invention is practiced, and it is to be understood that the scope of the invention is not limited to such specifically recited statements and examples. Those skilled in the art can make various other specific changes and combinations based on the teachings of the present invention without departing from the spirit of the invention, and these changes and combinations are within the scope of the invention.
Claims (7)
1. A high-molecular fluoropolymer-based micro-smoke safe and environment-friendly firework blasting explosive is characterized by comprising the following components: high molecular fluorine polymer, active reducing agent, explosion promoter, binder and dust reducing agent;
the composite material consists of the following components in parts by weight and particle size:
20-75 parts of high-molecular fluorine polymer with the particle size of 50-400 mu m; 8-47 parts of active reducing agent, and the particle size is 10-75 mu m; 5-35 parts of an explosion promoter, and the particle size is 10-120 mu m; 0.5-15 parts of dust reducing agent; 0.5-5 parts of a binder.
2. The high molecular fluoropolymer-based micro-smoke safe and environment-friendly firework explosive according to claim 1, which is characterized in that: the dust reducer is a high-boiling-point decarbonization oxide, and specifically comprises the following components: silicon dioxide or manganese dioxide.
3. The high molecular fluoropolymer-based micro-smoke safe and environment-friendly firework explosive according to claim 1, which is characterized in that: the adhesive is as follows: one of fluororubber, polyurethane elastomer, cellulose acetate butyrate, silicon rubber, phenolic resin and epoxy resin.
4. The high molecular fluoropolymer-based micro-smoke safe and environment-friendly firework explosive according to claim 1, which is characterized in that: the explosion promoter is: one of lead perchlorate, potassium chlorate and potassium permanganate.
5. The preparation method of the high molecular fluoropolymer-based micro-smoke safe and environment-friendly firework explosive according to claim 1, which is characterized by comprising the following steps:
the method comprises the following steps: adding the binder into ethyl acetate, uniformly stirring, dispersing the active reducing agent into the solution under the protection of inert atmosphere, soaking for 2 hours, filtering and drying to obtain the binder-coated active reducing agent;
step two: adding the high molecular fluorine polymer, the explosion promoter and the dust reducer into the dispersion liquid obtained in the step one, and uniformly stirring to obtain slurry;
step three: and E, extruding and granulating the slurry obtained in the step II through a granulator, and drying the granules to obtain the final product.
6. The preparation method of the high molecular fluoropolymer-based micro-smoke safe and environment-friendly firework explosive according to claim 5, which is characterized by comprising the following steps: the stirring time in the first step and the second step is 1-6 h, and the stirring speed is 100-200 rpm/min.
7. The preparation method of the high molecular fluoropolymer-based micro-smoke safe and environment-friendly firework explosive according to claim 6, which is characterized by comprising the following steps: the soaking time in the step one is 1-3 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110823539.7A CN113461466A (en) | 2021-07-21 | 2021-07-21 | Fluoropolymer-based micro-smoke safe and environment-friendly firework blasting powder and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110823539.7A CN113461466A (en) | 2021-07-21 | 2021-07-21 | Fluoropolymer-based micro-smoke safe and environment-friendly firework blasting powder and preparation method thereof |
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| CN113461466A true CN113461466A (en) | 2021-10-01 |
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| CN202110823539.7A Pending CN113461466A (en) | 2021-07-21 | 2021-07-21 | Fluoropolymer-based micro-smoke safe and environment-friendly firework blasting powder and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101633591A (en) * | 2008-07-25 | 2010-01-27 | 王生宝 | Fireworks product |
| CN111689823A (en) * | 2020-06-16 | 2020-09-22 | 湖南坤普科技有限公司 | Micro-smoke lead formula and preparation process thereof |
| CN112898105A (en) * | 2021-02-09 | 2021-06-04 | 北京理工大学 | Sulfur-free nitrogen-free high-temperature-resistant environment-friendly firework propellant and preparation method thereof |
-
2021
- 2021-07-21 CN CN202110823539.7A patent/CN113461466A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101633591A (en) * | 2008-07-25 | 2010-01-27 | 王生宝 | Fireworks product |
| CN111689823A (en) * | 2020-06-16 | 2020-09-22 | 湖南坤普科技有限公司 | Micro-smoke lead formula and preparation process thereof |
| CN112898105A (en) * | 2021-02-09 | 2021-06-04 | 北京理工大学 | Sulfur-free nitrogen-free high-temperature-resistant environment-friendly firework propellant and preparation method thereof |
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Application publication date: 20211001 |