阅读说明：本技术 一种低燃速安全环保烟花发射药 (Low-burning-rate safe and environment-friendly firework propellant ) 是由 束庆海 吴启才 于 2021-07-28 设计创作，主要内容包括：本发明公开的一种低燃速安全环保烟花发射药,属于烟花爆竹技术领域。所述低燃速安全环保烟花发射药由氟聚物基安全环保烟花基础配方和燃速调节剂构成,通过调整燃速调节剂的种类、粒径调整烟花的燃速。所得产品具有低燃速、无硫、无氮、微烟、耐高温、安全性高等优势,有利于提升烟花发射的柔性,降低对环境的噪音,提升燃放的安全感和舒适感,可广泛应用于烟花爆竹发射药。(The invention discloses a low-burning-speed safe and environment-friendly firework propellant, and belongs to the technical field of fireworks and crackers. The low-burning-rate safe and environment-friendly firework propellant is composed of a fluoropolymer-based safe and environment-friendly firework basic formula and a burning rate regulator, and the burning rate of fireworks is adjusted by adjusting the type and particle size of the burning rate regulator. The obtained product has the advantages of low burning speed, no sulfur, no nitrogen, little smoke, high temperature resistance, high safety and the like, is favorable for improving the flexibility of firework emission, reduces the noise to the environment, improves the safety and comfort of setting off, and can be widely applied to firework and firecracker propellant.)

1. The utility model provides a safe environmental protection fireworks propellant of low burning rate which characterized in that: the firework powder is composed of a fluoropolymer-based safe and environment-friendly firework basic formula and a burning speed regulator, and the burning speed of fireworks is regulated by regulating the type and particle size of the burning speed regulator.

2. The low burning speed safe and environment-friendly firework propellant as claimed in claim 1, wherein: the fluoropolymer-based safe and environment-friendly firework basic formula comprises a high-molecular fluoropolymer, active metal powder, a silane coupling agent and a binder.

3. The low burning speed safe and environment-friendly firework propellant as claimed in claim 1, wherein: the used combustion speed regulator is CuO or Fe₂O₃、Fe₃O₄、ZnO、MgO、CaO、Ag₂O、Al₂O₃Any one or a combination thereof.

4. The low burning speed safe and environment-friendly firework propellant as claimed in claim 2, wherein: the total part is 100, and the polymer fluoropolymer accounts for 30-75 parts; 25-70 parts of active metal powder; 0.5-3 parts of silane coupling agent; and 0.5-5 parts of binder.

5. The low burning speed safe and environment-friendly firework propellant as claimed in claim 2 or 4, wherein: the particle size of the high-molecular fluorine polymer is 50-400 mu m; the particle size of the active metal powder is 10-75 μm.

6. The preparation method for preparing the low-burning-rate safe and environment-friendly firework propellant as claimed in any one of claims 1 to 4 is characterized in that: the method comprises the following steps:

step one, modified coating

Surface modification: adding a silane coupling agent into ethyl acetate, uniformly stirring, dispersing active metal powder into a solution under the protection of inert atmosphere, soaking for a period of time, filtering and drying to obtain modified metal powder;

coating: adding the binder into ethyl acetate, and stirring until the binder is completely dissolved to obtain a solution A; dispersing the modified metal powder into the solution A, and stirring for a period of time to obtain a dispersion liquid of the binder-coated metal powder;

step two, forming preparation

Mixing powder: adding a high-molecular fluorine polymer and a combustion speed regulator into the dispersion liquid obtained in the step one, and stirring to obtain slurry; the violent oxidation-reduction reaction between the high molecular fluorine polymer and the active metal instantly releases high temperature to the outside to perform expansion work on air,

and (3) granulation: and extruding and granulating the obtained slurry through a granulator of a granule plate, and drying the obtained granules to obtain the final product.

Technical Field

The invention relates to a low-burning-speed safe and environment-friendly firework propellant, and belongs to the technical field of fireworks and crackers.

Background

The invention aims to solve the problems of environmental protection and safety in the prior art, and provides a low-burning-rate safe and environment-friendly firework propellant which has the characteristics of safety, environmental protection and reduction of the intensity of reaction; and the material source is wide, the cost is controllable, the preparation process is simple, and the method is suitable for batch industrial production.

Disclosure of Invention

The invention aims to solve the problems of environmental protection and safety in the prior art, and provides a low-burning-rate safe and environment-friendly firework propellant which has the characteristics of safety, environmental protection and reduction of the intensity of reaction; and the material source is wide, the cost is controllable, the preparation process is simple, and the method is suitable for batch industrial production.

The purpose of the invention is realized by the following technical scheme.

The invention discloses a low-burning-rate safe and environment-friendly firework propellant, which consists of a fluoropolymer-based safe and environment-friendly firework basic formula and a burning rate regulator, wherein the burning rate of fireworks is regulated by regulating the type and particle size of the burning rate regulator.

Preferably, the fluoropolymer-based safe and environment-friendly firework basic formula comprises a high-molecular fluoropolymer, active metal powder, a silane coupling agent and a binder.

Preferably, the used combustion speed regulator is CuO or Fe₂O₃、Fe₃O₄、ZnO、MgO、CaO、 Ag₂O、Al₂O₃Any one or a combination thereof.

Preferably, the basic formula of the fluoropolymer-based safe and environment-friendly firework is composed of 30-75 parts of fluoropolymer and active metal powder, wherein the total part is 100; 25-70 parts of active metal powder; 0.5-3 parts of silane coupling agent; and 0.5-5 parts of binder.

Preferably, the particle size of the high molecular fluorine polymer is 50-400 μm; the particle size of the active metal powder is 10-75 μm.

The invention discloses a preparation method of a low-burning-rate safe and environment-friendly firework propellant, which is used for preparing the low-burning-rate safe and environment-friendly firework propellant and comprises the following steps:

step one, modified coating

Surface modification: adding a silane coupling agent into ethyl acetate, uniformly stirring, dispersing active metal powder into a solution under the protection of inert atmosphere, soaking for a period of time, filtering and drying to obtain modified metal powder;

coating: adding the binder into ethyl acetate, and stirring until the binder is completely dissolved to obtain a solution A; dispersing the modified metal powder into the solution A, and stirring for a period of time to obtain a dispersion liquid of the binder-coated metal powder;

step two, forming preparation

Mixing powder: adding a high-molecular fluorine polymer and a combustion speed regulator into the dispersion liquid obtained in the step one, and stirring to obtain slurry; the violent oxidation-reduction reaction between the high molecular fluorine polymer and the active metal instantly releases high temperature to expand air to do work,

and (3) granulation: and extruding and granulating the obtained slurry through a granulator of a granule plate, and drying the obtained granules to obtain the final product.

Has the advantages that:

1. the invention discloses a low burning speed safe and environment-friendly firework propellant, which adopts conventional metal powder, high molecular fluoropolymer, binder and burning speed regulator 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. Compared with the conventional fluoropolymer/active metal powder system propellant, the low-burning-rate safe and environment-friendly firework propellant disclosed by the invention has the advantages of low burning rate, no sulfur, no nitrogen, little smoke, high temperature resistance, high safety and the like, is favorable for improving the flexibility of firework launching, reducing the noise to the environment and improving the safety and comfort of setting off, and can be widely applied to firework and firecracker propellants.

3. The low-burning-rate safe and environment-friendly firework propellant disclosed by the invention has excellent comprehensive performance of the adopted high-molecular fluorine polymer-based safe and environment-friendly firework, and particularly has the safety performance and the environment-friendly performance. 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, and the expansion work is performed on air. However, the reaction is high in intensity and high in reaction speed, so that the sound is high and fast when the propellant powder is ignited to push the explosive charge to lift off, the visual effect of firework setting off is influenced, and great noise pollution is caused. Aiming at the problems, the development of the safe and environment-friendly firework propellant with low burning speed is of great significance, and the safe and environment-friendly firework propellant with low burning speed can ensure the visual effect of firework setting off and reduce noise on the basis of having the comprehensive performance of the high-molecular fluorine polymer-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 commercially available 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 low-burning-rate 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 30 parts of spherical aluminum powder and 10 parts of spherical magnesium powder into a solution under the protection of inert atmosphere, soaking for 6h, filtering and drying to obtain modified metal powder;

coating: adding 2 parts of Estane 5702 into ethyl acetate, stirring until the Estane 5702 is completely dissolved, dispersing the modified metal powder into the solution, and stirring for 2 hours to obtain a dispersion liquid of the adhesive-coated metal powder.

(2) Preparation by molding

Mixing powder: adding 50 parts of polyvinylidene fluoride and 7 parts of combustion speed regulator CuO into the dispersion liquid obtained by coating the metal powder with the polybonder, and stirring for 4 hours at the rotating speed of 200rpm/min 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.

According to the test method of GJB 772A-1997 mechanical sensitivity, the impact sensitivity of the prepared firework propellant is 0% and the friction sensitivity is 0% by adopting a 10Kg drop hammer with a drop height of 25 cm.

Through the test method of laser ignition and high-speed photography, the burning speed of the prepared environment-friendly firework propellant sample is measured to be 48cm/s, and compared with the burning speed of 90cm/s without the formula of the burning speed regulator, the burning speed is obviously reduced.

Example 2

A preparation method of a low-burning-rate 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 10 parts of spherical magnesium powder and 22 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;

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: 60 parts of polyvinylidene fluoride and 5 parts of combustion speed regulator Fe₂O₃Adding the mixture into dispersion liquid obtained by coating metal powder with the polymeric binder, and stirring for 4 hours at the rotating speed of 200rpm/min 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.

According to the test method of GJB 772A-1997 mechanical sensitivity, the impact sensitivity of the prepared firework propellant is 0% and the friction sensitivity is 0% by adopting a 10Kg drop hammer with a drop height of 25 cm.

Through the test method of laser ignition and high-speed photography, the burning speed of the prepared environment-friendly firework propellant sample is 33cm/s, and compared with the burning speed of 90cm/s without the formula of the burning speed regulator, the burning speed is obviously reduced.

Example 3

A preparation method of a low-burning-rate safe and environment-friendly firework propellant comprises the following specific steps:

(1) modified coating

Surface modification: adding 0.5 part of silane coupling agent KH550 into ethyl acetate, stirring for 0.5h, dispersing 32 parts of spherical magnesium powder and 8 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;

coating: adding 1.5 parts of Estane 5702 into ethyl acetate, stirring until the Estane 5702 is completely dissolved, dispersing the modified metal powder into the solution, and stirring for 2 hours to obtain a dispersion liquid of the metal powder coated by the binder.

(2) Preparation by molding

Mixing powder: 50 parts of polyvinylidene fluoride and 8 parts of combustion speed regulator Fe₃O₄Adding the mixture into dispersion liquid obtained by coating metal powder with the polymeric binder, and stirring for 4 hours at the rotating speed of 200rpm/min 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.

According to the test method of GJB 772A-1997 mechanical sensitivity, the impact sensitivity of the prepared firework propellant is 0% and the friction sensitivity is 0% by adopting a 10Kg drop hammer with a drop height of 25 cm.

Through the test method of laser ignition and high-speed photography, the burning speed of the prepared environment-friendly firework propellant sample is measured to be 42cm/s, and compared with the burning speed of 90cm/s without the formula of the burning speed regulator, the burning speed is obviously reduced.

The above detailed description is further intended to explain the objects, technical solutions and advantages of the present invention in detail, and it should be understood that the above description is only an example 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.