Moisture-proof agent, micro-smoke firework propellant powder and micro-smoke firework blasting powder

Abstract

The invention relates to the technical field of firework preparation, in particular to a moisture-proof agent, a micro-smoke firework propellant powder and a micro-smoke firework blasting powder. The moisture-proof agent comprises the following raw materials: shellac, polyvinyl alcohol and a solvent. The micro-smoke firework propellant powder is prepared from 51-85 parts of moisture-proof ammonium perchlorate, 20-50 parts of a moisture-proof reducing agent and 65-80 parts of a moisture-proof agent. The micro-smoke firework explosive comprises 50-75 parts of moisture-proof ammonium perchlorate, 11-20 parts of a moisture-proof reducing agent and 12-22 parts of aluminum powder. The production process is simple and safe, does not need high-temperature and high-pressure processes and has high safety coefficient. The moisture-proof ammonium perchlorate is adopted as an oxidizing agent, the moisture-proof hemp stalk carbon powder and the like are adopted as a reducing agent, only a small amount of smoke is generated in the combustion process, and the ornamental effect is good. Solvent components of the moisture-proof agent can be volatilized in the drying process when the micro-smoke firework propellant powder is prepared, so that the interior of the moisture-proof agent is porous, the burning speed of the micro-smoke firework propellant powder can be increased, and a relatively simple preparation process and formula are adopted, so that the prepared firework product has better safety, environmental protection property, moisture resistance and economic benefits.

Description

Technical Field

[0001] The invention relates to the technical field of fireworks preparation, in particular to a moisture-proof agent, a low-smoke fireworks propellant and a low-smoke fireworks bursting powder. Background Art

[0002] The existing production process of fireworks propellants requires high temperature and high pressure granulation, which is not safe. In addition, fireworks propellants or bursting powder will produce a lot of smoke during the burning process. This problem has not been completely solved in the fireworks industry. The large amount of smoke produced will affect the viewing effect of the product and will also have an adverse impact on the environment.

[0003] In addition, since a lot of paper materials are needed in the production of fireworks and firecrackers, they are easily damp under high humidity conditions. Some medicinal raw materials are also easily dampened by reacting with moisture in the air and have a high moisture absorption rate, which will result in lower force when the fireworks and firecrackers are launched, affecting the viewing effect and the storage time of the product. It may even be easy for low explosions or tube explosions to occur during ignition, resulting in poor safety. Summary of the invention

[0004] The invention aims to improve the technical problems of existing fireworks and firecrackers products that they are prone to generate a lot of smoke and have poor moisture resistance.

[0005] To achieve the above object, the present invention provides a moisture-proof agent, which is prepared from the following raw materials: shellac, polyvinyl alcohol and a solvent.

[0006] Preferably, the solvent includes at least one of anhydrous ethanol, anhydrous methanol or anhydrous acetone.

[0007] Preferably, the weight ratio of the shellac, the polyvinyl alcohol and the solvent is (1.5-3):1:(15-25).

[0008] In addition, the present invention also provides a micro-smoke fireworks propellant, which is prepared by granulating and drying the following raw materials, calculated by weight: 51-85 parts of moisture-proof ammonium perchlorate, 20-50 parts of moisture-proof reducing agent and 65-80 parts of any of the above-mentioned moisture-proof agents;

[0009] The moisture-proof ammonium perchlorate is prepared by mixing ammonium perchlorate and any of the moisture-proof agents described above in a weight ratio of (0.7-1.3):1;

[0010] The moisture-proof reducing agent is prepared by uniformly mixing a reducing agent and any of the above-mentioned moisture-proof agents in a weight ratio of 1:(1.5-2.5).

[0011] Preferably, the reducing agent comprises 1-50 parts of hemp stalk charcoal powder, 1-30 parts of polyethylene powder and 0-20 parts of nitrocellulose powder containing a stabilizer; the stabilizer is diphenylamine.

[0012] Preferably, the mesh size of the moisture-proof ammonium perchlorate is greater than 200 meshes, and the mesh size of the moisture-proof carbon powder is greater than 150 meshes.

[0013] Preferably, the drying temperature during drying is ≤80°C.

[0014] In addition, the present invention also provides a low-smoke fireworks bursting agent, which is prepared by uniformly mixing the following raw materials, measured by weight: 50-75 parts of moisture-proof ammonium perchlorate, 11-20 parts of moisture-proof reducing agent, and 12-22 parts of aluminum powder;

[0015] The moisture-proof ammonium perchlorate is prepared by mixing ammonium perchlorate and any of the moisture-proof agents described above in a weight ratio of (0.7-1.3):1;

[0016] The moisture-proof reducing agent is prepared by mixing a reducing agent and any of the above-mentioned moisture-proof agents in a weight ratio of 1:(1.5-2.5).

[0017] Preferably, the reducing agent comprises 1-20 parts of hemp stalk charcoal powder, 1-20 parts of polyethylene powder, 0-20 parts of single-base powder and 0-20 parts of double-base powder.

[0018] Preferably, the mesh size of the moisture-proof ammonium perchlorate is greater than 200 meshes, the mesh size of the moisture-proof carbon powder is greater than 150 meshes, and the mesh size of the aluminum powder is greater than 200 meshes.

[0019] Compared with the military saltpeter produced by high temperature and high pressure granulation in the prior art, the micro-smoke fireworks propellant or micro-smoke fireworks bursting powder of the present invention has the following beneficial effects:

[0020] 1. The production process of the micro-smoke fireworks propellant of the present invention is simple and safe, does not require a high temperature and high pressure process, and has a high safety factor in the process of producing micro-smoke fireworks propellant or micro-smoke fireworks bursting powder.

[0021] 2. Moisture-proof ammonium perchlorate is used as an oxidant, and moisture-proof hemp charcoal powder is used as a reducing agent. The combustion of the above raw materials in an environment with sufficient oxygen will only produce a small amount of smoke, so that the amount of smoke produced during the launch process is small, and the viewing effect is good. No reducing agent such as sulfur is used, and no sulfur dioxide and aluminum sulfide dust are produced, which is more environmentally friendly. In addition, the formula of this solution is simple, the source is wide, the manufacturing cost is low, and the economic benefit is good.

[0022] 3. The moisture-proof agent of this scheme is used to prepare micro-smoke fireworks propellant or micro-smoke fireworks bursting powder, which has a good moisture-proof effect and a long product storage time; and the solvent of the micro-smoke fireworks propellant evaporates during the drying process, making the interior of the micro-smoke fireworks propellant porous, and can also increase the burning rate of the micro-smoke fireworks propellant and generate high-temperature and high-pressure gas to propel the fireworks into the sky.

[0023] 4. The micro-smoke fireworks propellant of this scheme only needs 80% of the existing military saltpeter to have the same launch height and effect, and the smoke produced by the same amount of micro-smoke fireworks propellant and the existing military saltpeter is only 20% of the existing military saltpeter. In addition, the moisture absorption rate of the micro-smoke fireworks propellant of this scheme is only about 60% of the moisture absorption rate of the existing military saltpeter.

[0024] In summary, this solution adopts a relatively simple preparation process and a simple formula, so that the prepared fireworks products have better safety, environmental protection, moisture resistance and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 The effect of the micro-smoke fireworks propellant embodiment 1 of the present invention is shown Figure 1 ;

[0027] Figure 2 The effect of the micro-smoke fireworks propellant embodiment 1 of the present invention is shown Figure 2 ;

[0028] Figure 3 The effect of the micro-smoke fireworks propellant embodiment 1 of the present invention is shown Figure 3 ;

[0029] Figure 4 The effect of the micro-smoke fireworks propellant embodiment 1 of the present invention is shown Figure 4 ;

[0030] Figure 5 The effect of the micro-smoke fireworks propellant embodiment 1 of the present invention is shown Figure 5 .

[0031] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] A moisture-proof agent is prepared from the following raw materials: shellac, polyvinyl alcohol and a solvent; the weight ratio of the shellac, the polyvinyl alcohol and the solvent is (1.5-3):1:(15-25); the solvent comprises at least one of anhydrous ethanol, anhydrous methanol or anhydrous acetone.

[0035] The moisture-proof agent in this scheme is a composite moisture-proof agent, and its main raw materials include shellac and polyvinyl alcohol. The shellac and polyvinyl alcohol are mixed in a solvent for use. The prepared moisture-proof agent can not only provide moisture-proof for the oxidant (ammonium perchlorate) and the reducing agent, but also serve as an adhesive to bond and granulate the oxidant and the reducing agent, thereby encapsulating the oxidant and the reducing agent, thereby achieving a better moisture-proof effect. In addition, the performance of the prepared fireworks products is also better.

[0036] A low-smoke firework propellant, which is prepared by granulating and drying the following raw materials, by weight: 51-85 parts of moisture-proof ammonium perchlorate, 20-50 parts of moisture-proof reducing agent and 65-80 parts of the above-mentioned moisture-proof agent;

[0037] The moisture-proof ammonium perchlorate is prepared by mixing ammonium perchlorate and the above-mentioned moisture-proof agent at a weight ratio of (0.7-1.3):1; the moisture-proof reducing agent is prepared by mixing the reducing agent and the above-mentioned moisture-proof agent at a weight ratio of 1:(1.5-2.5). The mesh number of the moisture-proof ammonium perchlorate is above 200 meshes, and the mesh number of the moisture-proof carbon powder is above 150 meshes; the drying temperature during drying is ≤80°C.

[0038] Fireworks propellants are also known as military saltpeter, explosive powder, military powder, fuse powder, firecracker powder, etc. Fireworks propellants are mainly used to push fireworks raw materials and shoot them into the sky. Usually, the height of the propellants can reach more than 25 meters. Fireworks and firecrackers products use a mixture of solid oxidants and solid reductants to burn, and also contain a small amount of auxiliary materials and fillers to produce "aerodynamic effects" and "flame color reactions", and finally present a colorful explosion effect.

[0039] In this embodiment, in order to reduce the solid dust generated by the combustion reaction, it is necessary to start from the reactants of the oxidant and the reductant. Since the generated smoke mainly contains solid dust, to solve the solid dust, it is necessary to make the solid oxidant and the reductant generate gas as much as possible when reacting. It is necessary to make the reactants after the decomposition of the selected oxidant anions and cations to be gas, and the reductant is also gas after the oxidation reaction. The solid oxidants commonly used in the existing fireworks and firecrackers industry include organic oxidants such as potassium perchlorate, ammonium perchlorate, potassium nitrate, and ammonium nitrate. Among them, potassium perchlorate reacts with the reductant to produce potassium chloride dust, and potassium nitrate reacts with the reductant to produce potassium oxide dust.

[0040] Therefore, this scheme uses ammonium perchlorate as the oxidant. The decomposition temperature of ammonium perchlorate is about 150 degrees. The reaction decomposes to produce oxygen, nitrogen, nitrogen dioxide, nitric oxide, water vapor and hydrogen chloride, etc. All products are gases, and there is less solid dust. Figures 1 to 5 As shown, the smoke generated by the micro-smoke fireworks propellant after launch is less and is almost invisible to the naked eye. However, ammonium perchlorate has a disadvantage that it easily absorbs moisture. Therefore, this embodiment uses the above-mentioned moisture-proof agent to modify ammonium perchlorate. The moisture-proof ammonium perchlorate is obtained by mixing the ammonium perchlorate and the moisture-proof agent at a weight ratio of (0.7-1.3):1, which has a good moisture-proof effect, and the performance of the micro-smoke fireworks propellant obtained is also better. In addition, the reducing agent of this scheme is also subjected to moisture-proof modification treatment. The moisture-proof reducing agent is obtained by mixing the reducing agent and the moisture-proof agent at a weight ratio of 1:(1.5-2.5).

[0041] The specific preparation steps include: taking 51-85 parts of oxidant-moisture-proof ammonium perchlorate and 20-50 parts of moisture-proof reducing agent by weight, mixing the moisture-proof ammonium perchlorate and moisture-proof reducing agent evenly, then adding the moisture-proof agent and mixing evenly, putting the mixture into a granulator for granulation after mixing evenly, adjusting the granulation according to the required mesh size (such as 5-8 meshes), and then drying and curing the obtained granular material to obtain the low-smoke fireworks propellant. Because the moisture-proof ammonium perchlorate and moisture-proof reducing agent are used, and the moisture-proof agent is also added to wrap the above raw materials, the moisture absorption rate of the low-smoke fireworks propellant is lower than that of the existing military nitrate, the moisture-proof effect is good, and the shelf life of the product can be improved.

[0042] And because the moisture-proof reducing agent in the micro-smoke fireworks propellant has a small specific gravity, and only 20-50 parts are added, the micro-smoke fireworks propellant is lighter in specific gravity and larger in volume than the existing military nitrate, and will not be extinguished when ignited with a fuse. After granulation with the moisture-proof agent, the solvent in the drying process will evaporate, and the coating and bonding process will make the interior of the micro-smoke fireworks propellant porous, which can increase the burning speed of the micro-smoke fireworks propellant, and generate high-temperature and high-pressure gas to propel the fireworks to high altitudes, which is in line with the principles of pyrotechnics.

[0043] The reducing agent comprises 1-50 parts of hemp stalk charcoal powder, 1-30 parts of polyethylene powder and 0-20 parts of nitrocellulose powder containing a stabilizer; the stabilizer is diphenylamine.

[0044] The reducing agent in this embodiment can be selected from hemp charcoal powder, polyethylene powder, nitrocellulose powder containing a stabilizer, the higher the purity, the better, and the larger the mesh number, the better; the nitrocellulose powder containing a stabilizer has a low combustion temperature and can be used as a combustion aid, and also has a certain moisture-proof effect. Moisture-proof ammonium perchlorate reacts with the above-mentioned reducing agent to generate carbon dioxide gas and water vapor, etc., to avoid the generation of solid dust as much as possible, and at the same time can generate huge energy and high-temperature and high-pressure gas, thereby improving the flame color reaction, combustion speed and emission force.

[0045] Preferably, only hemp stalk charcoal powder is used as the reducing agent. The moisture-proof hemp stalk charcoal powder reacts with moisture-proof ammonium perchlorate to generate carbon dioxide, both of which are gases, so the smoke, i.e., solid dust, produced is less, which is more environmentally friendly. Since the hemp stalk charcoal powder is flammable and the temperature generated during the combustion process is higher than other reducing agents, it can make the micro-smoke fireworks propellant burn faster during the combustion reaction and have better performance.

[0046] A low-smoke fireworks bursting agent is prepared by uniformly mixing the following raw materials, measured by weight: 50-75 parts of moisture-proof ammonium perchlorate, 11-20 parts of moisture-proof reducing agent, and 12-22 parts of aluminum powder;

[0047] The moisture-proof ammonium perchlorate is prepared by mixing ammonium perchlorate and the above-mentioned moisture-proof agent at a weight ratio of (0.7-1.3):1; the moisture-proof reducing agent is prepared by mixing the reducing agent and the above-mentioned moisture-proof agent at a weight ratio of 1:(1.5-2.5). The mesh number of the moisture-proof ammonium perchlorate is above 200 meshes, the mesh number of the moisture-proof carbon powder is above 150 meshes, and the mesh number of the aluminum powder is above 200 meshes.

[0048] As above, the formula design of the micro-smoke fireworks bursting agent and the micro-smoke fireworks propellant is similar to most of the raw materials, both of which have an explosive effect. However, the propellant mainly explodes at high altitudes. The micro-smoke fireworks bursting agent is similar to explosives and has explosive properties. When the micro-smoke fireworks bursting agent dosage is 40 grams, the bursting effect can be achieved when the existing bursting agent formula is 50 grams, and the volume can reach about 115 decibels when it bursts.

[0049] In the preparation process of the micro-smoke fireworks bursting powder, granulation is not required, and the following raw materials only need to be evenly mixed: by weight, 50-75 parts of moisture-proof ammonium perchlorate, 11-20 parts of moisture-proof reducing agent, and 12-22 parts of aluminum powder. The micro-smoke fireworks bursting powder prepared from the above raw materials will produce aluminum oxide and other small amounts of solid smoke after bursting, with obvious smoke reduction effect, improving the firing effect of fireworks products.

[0050] Compared with the same weight of low-smoke bursting powder, the smoke generated by the low-smoke fireworks bursting powder of this scheme is only 30% of the smoke of the existing bursting powder, and the low-smoke fireworks bursting powder of this scheme has better moisture resistance, which can improve the shelf life of the product.

[0051] The reducing agent comprises 1-20 parts of hemp charcoal powder, 1-20 parts of polyethylene powder, 0-20 parts of single-base powder and 0-20 parts of double-base powder. Moisture-proof ammonium perchlorate reacts with the moisture-proof reducing agent to generate carbon dioxide gas and water vapor, etc., which produces less solid dust, and can also generate huge energy and high-temperature and high-pressure gas, thereby improving flame color reaction, combustion speed and emission force.

[0052] The technical solution of the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the following embodiments are only used to explain the present invention, and are not used to limit the present invention.

[0053] Example 1

[0054] A low-smoke fireworks propellant is prepared by mixing 65 parts of moisture-proof ammonium perchlorate and 35 parts of moisture-proof reducing agent (hemp stalk carbon powder) evenly by weight, adding 70 parts of moisture-proof agent, mixing evenly, placing in a granulator for granulation, and drying at 80° C. to obtain the low-smoke fireworks propellant;

[0055] The moisture-proof ammonium perchlorate is prepared by mixing ammonium perchlorate and a moisture-proof agent in a weight ratio of 1:1; the moisture-proof reducing agent is prepared by mixing a reducing agent and a moisture-proof agent in a weight ratio of 1:2. The weight ratio of shellac, polyvinyl alcohol and solvent in the moisture-proof agent is 2:1:20.

[0056] Example 2

[0057] A low-smoke fireworks propellant is prepared by mixing 55 parts of moisture-proof ammonium perchlorate and 45 parts of moisture-proof reducing agent (40 parts of hemp stalk carbon powder + 5 parts of polyethylene powder) evenly, adding 75 parts of moisture-proof agent, mixing evenly, placing in a granulator for granulation, and drying at 80°C to obtain the low-smoke fireworks propellant;

[0058] The moisture-proof ammonium perchlorate is prepared by mixing ammonium perchlorate and moisture-proof agent at a weight ratio of 1.2:1; the moisture-proof reducing agent is prepared by mixing reducing agent and moisture-proof agent at a weight ratio of 1:2.5. The weight ratio of shellac, polyvinyl alcohol and solvent in the moisture-proof agent is 3:1:25.

[0059] Example 3

[0060] A low-smoke fireworks propellant is prepared by mixing 52 parts of moisture-proof ammonium perchlorate and 48 parts of moisture-proof reducing agent (10 parts of nitrocellulose powder containing a stabilizer and 38 parts of hemp stalk charcoal) by weight, adding 78 parts of moisture-proof agent, mixing evenly, placing in a granulator for granulation, and drying at 75°C to obtain the low-smoke fireworks propellant;

[0061] The moisture-proof ammonium perchlorate is prepared by mixing ammonium perchlorate and moisture-proof agent at a weight ratio of 0.8:1; the moisture-proof reducing agent is prepared by mixing reducing agent and moisture-proof agent at a weight ratio of 1:2. The weight ratio of shellac, polyvinyl alcohol and solvent in the moisture-proof agent is 2:1:18.

[0062] Example 4

[0063] A low-smoke fireworks propellant is prepared by mixing 65 parts of moisture-proof ammonium perchlorate and 35 parts of moisture-proof reducing agent (hemp stalk carbon powder) evenly by weight, adding 70 parts of moisture-proof agent, mixing evenly, placing in a granulator for granulation, and drying at 80° C. to obtain the low-smoke fireworks propellant;

[0064] The moisture-proof ammonium perchlorate is prepared by mixing ammonium perchlorate and a moisture-proof agent in a weight ratio of 1:1; the moisture-proof reducing agent is prepared by mixing a reducing agent and a moisture-proof agent in a weight ratio of 1:2. The weight ratio of shellac, polyvinyl alcohol and solvent in the moisture-proof agent is 1.5:1:22.

[0065] Example 5

[0066] A low-smoke fireworks propellant is prepared by mixing 72 parts of moisture-proof ammonium perchlorate and 28 parts of moisture-proof reducing agent (25 parts of hemp stalk carbon powder and 3 parts of polyethylene powder) evenly, adding 68 parts of moisture-proof agent, mixing evenly, placing in a granulator for granulation, and drying at 80°C to obtain a low-smoke fireworks propellant.

[0067] The moisture-proof ammonium perchlorate is prepared by mixing ammonium perchlorate and moisture-proof agent at a weight ratio of 1:1; the moisture-proof reducing agent is prepared by mixing reducing agent and moisture-proof agent at a weight ratio of 1:1.8. The weight ratio of shellac, polyvinyl alcohol and solvent in the moisture-proof agent is 3:1:20.

[0068] Comparative Example 1

[0069] The preparation steps and parameters in this comparative example are the same as those in Example 1, except that the moisture-proofing agent is prepared solely from shellac and solvent.

[0070] Comparative Example 2

[0071] The preparation steps and parameters in this comparative example are the same as those in Example 1, except that the moisture-proofing agent is prepared solely from polyvinyl alcohol and a solvent.

[0072] Comparative Example 3

[0073] The low-smoke fireworks propellant in this comparative example is low-smoke fireworks propellant purchased directly on the market.

[0074] The micro-smoke fireworks propellant products of the above-mentioned embodiments and comparative examples were subjected to the following performance tests, and the test results are shown in the following table:

[0075] Smoke volume Moisture absorption rate Impact sensitivity friction sensitivity Ignition temperature Example 1 few 1.5％ 0 0 210℃ Example 2 few 1.6％ 0 0 203℃ Example 3 few 1.7％ 0 0 215℃ Example 4 few 1.7％ 0 0 201℃ Example 5 few 1.65％ 0 0 208℃ Comparative Example 1 few 1.95％ 0 0 205℃ Comparative Example 2 few 2.0％ 0 0 203℃ Comparative Example 3 many 2.35％ 0 0 194℃

[0076] From the test data in the table above, it can be seen that the smoke-free fireworks propellant of this scheme produces less smoke after launch, and has a lower moisture absorption rate than the products on the market, which is only about 60% of the moisture absorption rate of existing products. At the same time, due to the introduction of moisture-proof agent, the smoke-free fireworks propellant itself also has better performance.

[0077] Among them, from the test results of Example 1 and Example 4, it can be seen that in the formula of the moisture-proof agent, when the weight ratio of shellac, polyvinyl alcohol and solvent is 2:1:20, the improvement effect on the micro-smoke fireworks propellant is best, which can ensure that the micro-smoke fireworks propellant has a smaller moisture absorption rate (maintained at about 1.5%), and the performance of the micro-smoke fireworks propellant itself is also the best.

[0078] Example 6

[0079] A low-smoke fireworks bursting agent is prepared by uniformly mixing the following raw materials, measured by weight: 66 parts of moisture-proof ammonium perchlorate, 20 parts of moisture-proof reducing agent (hemp stalk carbon powder), and 14 parts of aluminum powder;

[0080] The moisture-proof ammonium perchlorate is prepared by mixing ammonium perchlorate and a moisture-proof agent at a weight ratio of 1.1:1; the moisture-proof reducing agent is prepared by mixing a reducing agent and a moisture-proof agent at a weight ratio of 1:2. The weight ratio of shellac, polyvinyl alcohol and solvent in the moisture-proof agent is 2:1:15.

[0081] Example 7

[0082] A low-smoke fireworks bursting agent is prepared by uniformly mixing the following raw materials, measured by weight: 68 parts of moisture-proof ammonium perchlorate, 18 parts of moisture-proof reducing agent (hemp stalk carbon powder), and 14 parts of aluminum powder;

[0083] The moisture-proof ammonium perchlorate is prepared by mixing ammonium perchlorate and a moisture-proof agent at a weight ratio of 1.2:1; the moisture-proof reducing agent is prepared by mixing a reducing agent and a moisture-proof agent at a weight ratio of 1:2.5. The weight ratio of shellac, polyvinyl alcohol and solvent in the moisture-proof agent is 3:1:25.

[0084] Example 8

[0085] A low-smoke fireworks bursting agent is prepared by uniformly mixing the following raw materials, measured by weight: 71 parts of moisture-proof ammonium perchlorate, 20 parts of moisture-proof reducing agent (15 parts of hemp stalk carbon powder + 2 parts of single-base powder + 3 parts of double-base powder), and 9 parts of aluminum powder;

[0086] The moisture-proof ammonium perchlorate is prepared by mixing ammonium perchlorate and a moisture-proof agent at a weight ratio of 0.7:1; the moisture-proof reducing agent is prepared by mixing a reducing agent and a moisture-proof agent at a weight ratio of 1:1.6. The weight ratio of shellac, polyvinyl alcohol and solvent in the moisture-proof agent is 2:1:20.

[0087] Example 9

[0088] A low-smoke fireworks bursting agent is prepared by mixing the following raw materials uniformly, measured by weight: 72 parts of moisture-proof ammonium perchlorate, 17 parts of moisture-proof reducing agent (13 parts of hemp stalk carbon powder + 4 parts of polyethylene powder), and 11 parts of aluminum powder;

[0089] The moisture-proof ammonium perchlorate is prepared by mixing ammonium perchlorate and a moisture-proof agent in a weight ratio of 1:1; the moisture-proof reducing agent is prepared by mixing a reducing agent and a moisture-proof agent in a weight ratio of 1:2. The weight ratio of shellac, polyvinyl alcohol and solvent in the moisture-proof agent is 2.5:1:20.

[0090] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A moisture proof agent, characterized in that: The invention is prepared by comprising the following raw materials: shellac, polyvinyl alcohol and solvent.

2. A moisture proof agent according to claim 1, characterized in that: The solvent includes at least one of anhydrous ethanol, anhydrous methanol or anhydrous acetone.

3. A moisture proof agent according to claim 1, characterized in that: The weight ratio of the shellac, the polyvinyl alcohol and the solvent is (1.5-3):1:(15-25).

4. A low smoke fireworks propellant, characterized in that: The method comprises the following raw materials, by weight, which are granulated and dried: 51-85 parts of moisture-proof ammonium perchlorate, 20-50 parts of moisture-proof reducing agent, and 65-80 parts of the moisture-proof agent according to any one of claims 1 to 3; The moisture-proof ammonium perchlorate is prepared by mixing ammonium perchlorate and the moisture-proof agent according to any one of claims 1 to 3 in a weight ratio of (0.7-1.3):1; The moisture-proof reducing agent is prepared by uniformly mixing a reducing agent and the moisture-proof agent described in any one of claims 1 to 3 in a weight ratio of 1:(1.5-2.5).

5. The low-smoke fireworks propellant according to claim 4, characterized in that: The reducing agent comprises, by weight, 1-50 parts of hemp stalk charcoal powder, 1-30 parts of polyethylene powder and 0-20 parts of nitrocellulose powder containing a stabilizer; the stabilizer is diphenylamine.

6. The low-smoke fireworks propellant according to claim 4, characterized in that: The mesh size of the moisture-proof ammonium perchlorate is greater than 200 meshes, and the mesh size of the moisture-proof carbon powder is greater than 150 meshes.

7. The low-smoke fireworks propellant according to claim 4, characterized in that: The drying temperature during drying is ≤80℃.

8. A low-smoke fireworks bursting charge, characterized in that: The method comprises the following raw materials which are uniformly mixed by weight: 50-75 parts of moisture-proof ammonium perchlorate, 11-20 parts of moisture-proof reducing agent and 12-22 parts of aluminum powder; The moisture-proof ammonium perchlorate is prepared by mixing ammonium perchlorate and the moisture-proof agent according to any one of claims 1 to 3 at a weight ratio of (0.7-1.3):1; The moisture-proof reducing agent is prepared by mixing a reducing agent and the moisture-proof agent according to any one of claims 1 to 3 in a weight ratio of 1:(1.5-2.5).

9. The light smoke fireworks bursting charge according to claim 8, characterized in that: In parts by weight, the reducing agent comprises 1-20 parts of hemp stalk carbon powder, 1-20 parts of polyethylene powder, 0-20 parts of single-base powder and 0-20 parts of double-base powder.

10. The light smoke fireworks bursting charge according to claim 8, characterized in that: The mesh number of the moisture-proof ammonium perchlorate is greater than 200 meshes, the mesh number of the moisture-proof carbon powder is greater than 150 meshes, and the mesh number of the aluminum powder is greater than 200 meshes.

Images