Composite material, micro-smoke nail-shooting pill propellant powder and firework micro-smoke propellant powder

Abstract

The invention relates to the technical field of propellant powder, in particular to a composite material, micro-smoke nail-shooting pill propellant powder and firework micro-smoke propellant powder. The composite material comprises the following raw materials: sulfur powder, polyethylene powder and moisture-proof hexamethylenetetramine powder. When the composite material is added into a micro-smoke nail-shooting pill propellant powder or a firework micro-smoke propellant powder, the sulfur in the composite material can increase the reaction speed, and metal sulfide is not generated. The polyethylene powder does not generate smoke when reacting under sufficient oxygen, and the energy released in the combustion process is high. The moisture-proof hexamethylenetetramine reacts with oxygen and is decomposed to generate a large amount of carbon dioxide gas, water vapor and ammonia gas, smoke and slag are avoided in the combustion process, a large amount of heat is released, and the moisture-proof hexamethylenetetramine is mixed with nitrocellulose with a low ignition point and polyethylene with a high combustion value for use, so that the ignition point of the product is reduced, and the combustion effect is better. Glucose can react under sufficient oxygen without smoke, and meanwhile, the manufacturing cost of the propellant powder is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of propellant, in particular to a composite material, a micro-smoke nail shooting bullet propellant and a micro-smoke firework propellant. BACKGROUND

[0002] The nail shooting bullet is a kind of impact type fastening tool ammunition used with nail shooting gun, mainly used for driving nails into hard materials such as concrete, steel plate or wood, etc. Due to its convenience and high efficiency, it is widely used in the fields of construction, decoration and manufacturing industry. The nail shooting bullet propellant is usually smokeless powder (such as nitrocellulose-based or nitroglycerin-based propellant), which needs to have the following characteristics: 1. High burning rate: release a large amount of gas in a short time to provide instantaneous thrust; 2. Low residue: reduce the pollution of the gun barrel and prolong the service life of the tool; 3. Stability: ensure the safety of transportation and storage.

[0003] The existing nail shooting bullet propellant formula has the following problems when used: 1. The reducing agent used usually contains metal materials such as aluminum powder and aluminum-magnesium alloy powder, which makes the friction sensitivity and impact sensitivity of the nail shooting bullet high, and the metal powder such as aluminum powder and aluminum-magnesium alloy powder is easy to cause safety accidents due to oxidation and heat release when it meets water, and a large amount of smoke and dust will be generated when the metal powder reacts with the oxidizing agent; 2. The oxidizing agent used, such as nitrohydrazine hydrate, has unstable chemical properties, and the oxidizing agent containing metal ions (such as potassium ions) will also produce corrosive salt and smoke and dust when it reacts with the reducing agent. 3. The existing nail shooting bullet propellant formula contains a high proportion of nitroglycerin, which is unstable.

[0004] The firework propellant is a kind of pyrotechnic composition used to propel the firework body to ascend or produce jet effect, which is usually composed of oxidizing agent, combustible material and binder (such as components mixed by potassium nitrate, sulfur and charcoal, etc.). Its main functions include: 1. Propulsion: fast-burning propellant is used to propel the firework from the launching tube to high altitude; 2. Jetting: slow-burning propellant is used to produce continuous jet flame (such as color smoke or bright bead jet). The biggest problem of the existing firework propellant is safety and environmental protection, and a large amount of smoke is generated during the burning process, which seriously affects the viewing effect and also causes certain pollution to the environment. SUMMARY

[0005] The main purpose of the present application is to provide a composite material, a micro-smoke nail shooting bullet propellant and a micro-smoke firework propellant, which aims to improve the technical problem that the existing nail shooting bullet propellant or firework propellant will generate a large amount of smoke dust when burning.

[0006] To achieve the above purpose, the present application provides a composite material, which comprises the following raw materials: sulfur powder, polyethylene powder and moisture-proof hexamethylenetetramine powder.

[0007] Preferably, the composite material further comprises glucose powder.

[0008] Preferably, the moisture-proof type hexamethylene tetramine powder is obtained by drying the moisture-proof type hexamethylene tetramine powder after being treated by the moisture-proof agent containing the nitrocellulose, the acetone, the ethanol solution and the stabilizer.

[0009] In addition, the present application also provides a micro-smoke nail shooting bullet propellant, which is prepared by mixing the following raw materials and then performing the processes of compression, crushing and drying: 50-85% of the moisture-proof type ammonium perchlorate, 6-11% of the composite material, 1-15% of the single-base powder and 1-25.5% of the double-base powder. The moisture-proof type adhesive is added in the micro-smoke nail shooting bullet propellant, and the adding amount of the moisture-proof type adhesive is 25-35% of the total weight of the raw materials of the micro-smoke nail shooting bullet propellant after drying. The weight ratio of the sulfur powder, the polyethylene powder, the glucose powder and the moisture-proof type hexamethylene tetramine powder in the composite material is (0-3):(1-3):(0-3):(1-6).

[0010] Preferably, the moisture-proof type adhesive is prepared by dissolving the following raw materials in the organic solvent: 0-8% of the nitrocellulose, 0-8% of the single-base powder, 0-8% of the double-base powder, 0-1% of the stabilizer, 0-1% of the medium stabilizer and 80-94% of the organic solvent.

[0011] Preferably, the moisture-proof type ammonium perchlorate is obtained by drying the moisture-proof type ammonium perchlorate after being treated by the moisture-proof agent containing the nitrocellulose, the acetone, the ethanol solution and the stabilizer.

[0012] Preferably, the stabilizer is diphenylamine; the medium stabilizer is dimethyl diphenyl urea; and the organic solvent includes acetone and ethanol.

[0013] In addition, the present application also provides a micro-smoke nail shooting bullet propellant, which is prepared by mixing the following raw materials and then performing the processes of compression, crushing and drying: 50-85% of the moisture-proof type ammonium perchlorate, 6-11% of the composite material, 1-15% of the single-base powder and 1-25.5% of the double-base powder. The moisture-proof type adhesive is added in the micro-smoke nail shooting bullet propellant, and the adding amount of the moisture-proof type adhesive is 25-35% of the total weight of the raw materials of the micro-smoke nail shooting bullet propellant after drying. The weight ratio of the sulfur powder, the polyethylene powder, the glucose powder and the moisture-proof type hexamethylene tetramine powder in the composite material is (0-3):(1-4):(0-2):(4-9).

[0014] Preferably, the moisture-proof type adhesive is prepared by dissolving the following raw materials in the organic solvent: 3-10% of the nitrocellulose, 0-10% of the single-base powder, 0-10% of the single-base powder, 0-10% of the double-base powder, 0-1% of the stabilizer, 0-1% of the medium stabilizer and 85-92% of the organic solvent.

[0015] Preferably, the stabilizer is diphenylamine; the intermediate stabilizer is dimethyl diphenyl urea; and the organic solvent comprises acetone and ethanol.

[0016] Preferably, the moisture-proof ammonium perchlorate is obtained by drying the ammonium perchlorate treated by the moisture-proof agent containing nitrocellulose, acetone, ethanol and stabilizer.

[0017] Compared with the prior art, the composite material, the micro-smoke shooting nail bullet propellant and the micro-smoke firework propellant have the following beneficial effects: 1. When the composite material is added to the micro-smoke shooting nail bullet propellant or the micro-smoke firework propellant, the sulfur can improve the reaction speed without generating metal sulfide. The polyethylene powder reacts without smoke under sufficient oxygen, and the polyethylene contains carbon and hydrogen elements, so that the energy released in the combustion process is high, and high-temperature and high-pressure gas is generated. A large amount of carbon dioxide gas, water vapor and ammonia gas are generated after the moisture-proof hexamethylene tetramine reacts and decomposes, and the combustion process is smokeless and residue-free, and a large amount of heat is released. The moisture-proof hexamethylene tetramine is mixed with the nitrocellulose with low ignition point and the polyethylene with high combustion value, so that the ignition point of the product is reduced, the combustion effect is better, and the use of the moisture-proof hexamethylene tetramine can greatly reduce or even replace the use of double-base powder and metal powder (such as aluminum powder). The glucose can react without smoke under sufficient oxygen, and the manufacturing cost of the propellant is reduced.

[0018] 2. The special moisture-proof adhesive is used in the scheme, so that various raw materials of the micro-smoke shooting nail bullet propellant or the micro-smoke firework propellant are firmly bonded to form a stable propellant. The dense network structure formed after the nitrocellulose and the organic solvent are dissolved and volatilized is used as a mechanical skeleton, so that the raw materials have high strength after being bonded, and the fragmentation of the traditional black powder caused by insufficient mechanical strength is avoided. The dense network structure also has certain hydrophobicity, which can significantly reduce the moisture absorption rate, and the effective moisture-proof of the propellant is realized. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other related drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1 It is the actual picture of the micro-smoke shooting nail bullet propellant of the present application after being crushed; Figure 2 It is the actual picture of the micro-smoke shooting nail bullet propellant of the present application after being crushed.

[0021] The objectives, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work shall fall within the protection scope of the present application.

[0023] In addition, the technical solutions in the embodiments can be combined with each other, but the combination of the technical solutions should be based on the fact that a person of ordinary skill in the art can realize the combination. When the combination of the technical solutions appears to be contradictory or unachievable, it shall be considered that the combination of the technical solutions does not exist and is not within the protection scope of the present application.

[0024] A composite material comprises the following raw materials: sulfur powder, polyethylene powder, glucose powder and moisture-proof hexamethylenetetramine powder. The moisture-proof hexamethylenetetramine powder is obtained by directly mixing hexamethylenetetramine powder with a moisture-proof agent containing nitrocellulose acetone, ethanol solution and stabilizer, and then drying. The mass ratio of the hexamethylenetetramine powder to the total amount of other raw materials is 2-3:1. The content of other raw materials when mixed can be 5% of nitrocellulose, 1% of stabilizer-diphenylamine, 8% of acetone and 86% of ethanol.

[0025] In addition, the present application further provides a micro-smoke nail shooting bullet propellant, which is prepared by mixing the following raw materials in percentage by weight and then performing compression, crushing and drying processes: moisture-proof ammonium perchlorate 50-85% (oxidizing agent), the composite material described above 6-11% (reducing agent), single-base powder 1-15% (reducing agent) and double-base powder 1-25.5% (reducing agent). The moisture-proof adhesive is added in the micro-smoke nail shooting bullet propellant, and the added amount of the moisture-proof adhesive is 25-35% of the total weight of the raw materials of the micro-smoke nail shooting bullet propellant after drying. The weight ratio of the sulfur powder, the polyethylene powder, the glucose powder and the moisture-proof hexamethylenetetramine powder in the composite material is (0-3):(1-3):(0-3):(1-6).

[0026] The specific preparation steps of the micro-smoke nail shooting bullet propellant of the scheme are as follows: the above-mentioned raw materials are mixed in proportion, then are kneaded into a dough shape by a kneader, then the dough-shaped material is crushed / cut into small pieces, after the small pieces are solidified, the small pieces are crushed by a pair of rollers, after crushing, the powder material with a particle size of more than 80 meshes is obtained, and the powder material is dried at about 70 DEG C to obtain the finished product of the micro-smoke nail shooting bullet propellant. The above-mentioned micro-smoke nail shooting propellant is pressed into a 280 mg columnar propellant by a 300 t oil press, the propellant has good hardness and surface finish, and can penetrate an 8 mm thick iron plate.

[0027] The specific raw materials of the micro-smoke nail shooting bullet propellant of the scheme include moisture-proof ammonium perchlorate treated by a moisture-proof agent, a composite material, single-base powder, double-base powder and a moisture-proof adhesive, and no other oxidizing agent needs to be added (the addition of other oxidizing agents can be used as auxiliary materials or fillers, and the addition of other reducing agents can be regarded as invalid and fillers). Since the ammonium perchlorate and the hexamethylenetetramine in the above-mentioned formula are easy to absorb moisture, they need to be treated by a moisture-proof agent, and the moisture-proof ammonium perchlorate and the moisture-proof hexamethylenetetramine prepared have low moisture absorption. The micro-smoke nail shooting bullet propellant obtained by using the above-mentioned raw materials and steps has good moisture resistance, fluidity, uniformity and high-pressure columnar performance, and the production process is safe and simple.

[0028] The oxidizing agent ammonium perchlorate reacts with other raw materials to generate less residue and has little corrosion to the nail gun barrel. Since no inorganic salt containing metal ions is generated, no smoke and metal oxide are generated. The single-base powder and the double-base powder containing nitrocellulose have low ignition point and fast burning rate, but the temperature generated in the combustion process is low. The addition of the moisture-proof adhesive ensures the quality of the product and prolongs the shelf life.

[0029] The sulfur added in the composite material can improve the reaction speed and will not generate metal sulfide. The polyethylene powder used will not generate smoke under sufficient oxygen. Since the polyethylene contains carbon and hydrogen elements, the energy released in the combustion process is high, and high-temperature and high-pressure gas is generated. The hexamethylenetetramine reacts with oxygen to generate a large amount of carbon dioxide gas, water vapor and ammonia gas. The combustion process is smoke-free and residue-free, and a large amount of heat is released. The disadvantage is that the ignition point is high and the moisture absorption is easy. To improve this defect, the hexamethylenetetramine is treated by the moisture-proof agent to obtain moisture-proof hexamethylenetetramine. The moisture-proof hexamethylenetetramine is mixed with nitrocellulose with low ignition point and polyethylene with high combustion value, which avoids the above-mentioned problems. The addition of the moisture-proof hexamethylenetetramine can greatly reduce or even replace the use of double-base powder and metal powder (such as aluminum powder and aluminum-magnesium alloy powder). The glucose can react without smoke under sufficient oxygen, and the manufacturing cost of the propellant is reduced.

[0030] In addition, the scheme is also an innovation based on patent No. 202411289891.7 “Moisture-proof agent, micro-smoke firework propellant and micro-smoke firework initiating explosive”.

[0031] Further, the moisture-proof adhesive is made of 0-8% of nitrocellulose, 0-8% of single-base powder, 0-8% of double-base powder, 0-1% of stabilizer, 0-1% of intermediate stabilizer and 80-94% of organic solvent by weight percentage.

[0032] The main purpose of the moisture-proof adhesive is to firmly bond the above-mentioned raw materials of the micro-smoke launching nail propellant to form a stable propellant, wherein the dense network structure formed after the dissolution and volatilization of the nitrocellulose and the organic solvent serves as a mechanical skeleton, so that the raw materials have high strength after bonding, and the fragmentation of the traditional black powder caused by insufficient mechanical strength is avoided; the above-mentioned dense network structure also has certain hydrophobicity, which can significantly reduce the moisture absorption rate, and the effective moisture-proof of the propellant is realized. In addition, the nitrocellulose can also provide basic combustion performance, the single / double-base powder can supplement energy, the stabilizer and the intermediate stabilizer can stabilize the reaction process of the propellant, and a predictable burning rate curve is formed, and the above-mentioned stabilizing system also inhibits the decomposition to a certain extent, and ensures that the raw materials can still be stable for a long time in a humid and hot environment.

[0033] Further, the stabilizer is diphenylamine, the intermediate stabilizer is dimethyl diphenyl urea, and the organic solvent includes acetone and ethanol.

[0034] Further, the moisture-proof ammonium perchlorate is directly mixed with the moisture-proof agent containing the nitrocellulose acetone and ethanol solution and the stabilizer, and then dried, and the mass ratio of the ammonium perchlorate to the total amount of other raw materials can be 2-3:1. Among them, the content of other raw materials when mixed can be 5% of nitrocellulose, 1% of stabilizer-diphenylamine, 8% of acetone and 86% of ethanol. Similarly, the ammonium perchlorate is also treated by the above-mentioned moisture-proof agent to ensure the reliability and the consistency of the burning rate of the propellant in a humid environment.

[0035] In addition, the present application also provides a micro-smoke firework propellant, which is made by mixing the following raw materials by weight percentage and then compressing, crushing and drying: moisture-proof ammonium perchlorate 50-85%, the above-mentioned composite material 4-12%, hemp rod carbon powder 0.5-30%, single-base powder 1-20%, double-base powder 1-20% and aluminum powder 0-10%. The moisture-proof adhesive is added in the micro-smoke firework propellant, and the adding amount of the moisture-proof adhesive is 25-38% of the total weight of the raw materials of the micro-smoke firework propellant after drying. The weight ratio of the sulfur powder, the polyethylene powder, the glucose powder and the moisture-proof hexamethylenetetramine powder in the composite material is (0-3):(1-40):(0-20):(40-90).

[0036] The specific preparation steps of the firework micro-smoke propellant of the present solution are as follows: uniformly mixing the raw materials except the moisture-proof adhesive according to the proportion, spraying the moisture-proof adhesive under stirring, and then feeding all the raw materials into a granulator to granulate, the size of the granulated product is more than 150 meshes, and then drying at about 70°C to obtain the firework micro-smoke propellant used in the firework industry.

[0037] Of course, the above propellant can also be used as micro-smoke detonating agent, micro-smoke military powder (the size of the granulated product is more than 100 meshes), micro-smoke military powder nitre (the size of the granulated product is 2-8 meshes), micro-smoke firecracker agent, micro-smoke fuse agent (the size of the granulated product is 20-40 meshes), and micro-smoke firework agent.

[0038] The effects of each component in the composite material on the firework micro-smoke propellant are similar to those of the above micro-smoke nail bomb propellant, and will not be described here. The main difference is that the firework micro-smoke propellant further introduces charcoal powder of bamboo rods and aluminum powder. The charcoal powder of bamboo rods and the glucose powder in the composite material produce less smoke when burning under sufficient oxygen. On the one hand, the introduction of charcoal powder of bamboo rods and glucose can reduce the cost. On the other hand, the density of the granulated product is small, there are holes in the granules, the burning speed is fast, it is easy to ignite, and the product quality of the firework micro-smoke propellant is guaranteed. The charcoal powder of bamboo rods burns fast under the participation of the oxidant, moisture-proof ammonium perchlorate and other raw materials, which can reduce the amount of single-base powder and double-base powder used in the present solution, and produce high combustion value and high temperature, making the product easy to ignite. The addition of aluminum powder can improve the burning brightness and jetting effect of the product.

[0039] Further, the moisture-proof adhesive is prepared by dissolving nitrocellulose 0-10%, single-base powder 0-10%, double-base powder 0-10%, stabilizer 0-1%, intermediate stabilizer 0-1% and organic solvent 85-92% by weight percentage.

[0040] Further, the stabilizer is diphenylamine; the intermediate stabilizer is dimethyl diphenyl urea; and the organic solvent includes acetone and ethanol.

[0041] Further, the moisture-proof ammonium perchlorate is prepared by drying ammonium perchlorate treated with a moisture-proof agent containing a solution of nitrocellulose in acetone and ethanol and a stabilizer. The preparation steps / parameters of the moisture-proof ammonium perchlorate are the same as those of the moisture-proof ammonium perchlorate in the micro-smoke nail bomb propellant.

[0042] The technical solutions of the present application will be further described in detail below in combination with specific examples. It should be understood that the following examples are only used to explain the present application and not to limit the present application.

[0043] Example 1 A micro-smoke nail bullet launching propellant, comprising the following raw materials mixed and then compressed, crushed and dried in the percentage of weight: moisture-proof ammonium perchlorate 68%, composite material 7.5% (sulfur powder, polyethylene powder and moisture-proof hexamethylenetetramine powder are 1%, 2.5% and 4% respectively), single-base powder 5%, double-base powder 19.5%, and the amount of moisture-proof adhesive is 25% of the total weight of the above raw materials after drying; The moisture-proof adhesive is made by dissolving nitrocellulose 6%, single-base powder 0%, double-base powder 0%, stabilizer 0.8%, intermediate stabilizer 0% and organic solvent (acetone 6%, ethanol 87.2%).

[0044] Example 2 A micro-smoke nail bullet launching propellant, comprising the following raw materials mixed and then compressed, crushed and dried in the percentage of weight: moisture-proof ammonium perchlorate 60%, composite material 10.5% (sulfur powder, polyethylene powder and moisture-proof hexamethylenetetramine powder are 1.5%, 3% and 6% respectively), single-base powder 4%, double-base powder 25.5%, and the amount of moisture-proof adhesive is 30% of the total weight of the above raw materials after drying; The moisture-proof adhesive is made by dissolving nitrocellulose 0%, single-base powder 0%, double-base powder 8%, stabilizer 0%, intermediate stabilizer 1% and organic solvent (acetone 6%, ethanol 85%).

[0045] Example 3 A micro-smoke nail bullet launching propellant, comprising the following raw materials mixed and then compressed, crushed and dried in the percentage of weight: moisture-proof ammonium perchlorate 66%, composite material 11% (sulfur powder, polyethylene powder, glucose powder and moisture-proof hexamethylenetetramine powder are 3%, 1%, 2% and 5% respectively), single-base powder 6%, double-base powder 17%, and the amount of moisture-proof adhesive is 35% of the total weight of the above raw materials after drying; The moisture-proof adhesive is made by dissolving nitrocellulose 8%, single-base powder 0%, double-base powder 2%, stabilizer 1%, intermediate stabilizer 0.5% and organic solvent (acetone 6%, ethanol 82.5%).

[0046] Example 4 A micro-smoke nail bullet launching propellant, comprising the following raw materials mixed and then compressed, crushed and dried in the percentage of weight: moisture-proof ammonium perchlorate 70%, composite material 9% (sulfur powder, polyethylene powder and moisture-proof hexamethylenetetramine powder are 1%, 4% and 4% respectively), hemp rod carbon powder 4%, single-base powder 4%, double-base powder 13%, and the amount of moisture-proof adhesive is 33% of the total weight of the above raw materials; The moisture-proof adhesive is made by dissolving nitrocellulose 0%, single-base powder 0%, double-base powder 8%, stabilizer 0%, intermediate stabilizer 1% and organic solvent (acetone 6%, ethanol 85%).

[0047] Example 5 A micro-smoke launching charge for fireworks, comprising the following raw materials mixed and then subjected to compression, pulverization and drying processes in the following proportions by weight: moisture-proof ammonium perchlorate 72%, composite material 9% (polyethylene powder and moisture-proof hexamethylenetetramine powder in the proportions of 3% and 6% by weight), charcoal powder 8%, single-base powder 5%, double-base powder 6%; the amount of moisture-proof adhesive added is 29% of the total weight of the above raw materials; The moisture-proof adhesive is prepared by dissolving nitrocellulose 0%, single-base powder 4%, double-base powder 4%, stabilizer 0%, intermediate stabilizer 0.5% and organic solvent (acetone 7%, ethanol 84.5%).

[0048] Example 6 A micro-smoke launching charge for fireworks, comprising the following raw materials mixed and then subjected to compression, pulverization and drying processes in the following proportions by weight: moisture-proof ammonium perchlorate 72%, composite material 9% (polyethylene powder and moisture-proof hexamethylenetetramine powder in the proportions of 3% and 6% by weight), charcoal powder 8%, single-base powder 5%, double-base powder 6%; the amount of moisture-proof adhesive added is 29% of the total weight of the above raw materials; The moisture-proof adhesive is prepared by dissolving nitrocellulose 3%, single-base powder 5%, double-base powder 0%, stabilizer 0.5%, intermediate stabilizer 0% and organic solvent (acetone 6%, ethanol 85.5%).

[0049] Comparative Example 1 The preparation steps in this comparative example are the same as those in Example 1, except that the hexamethylenetetramine powder is not moisture-proof treated.

[0050] Comparative Example 2 The preparation steps in this comparative example are the same as those in Example 1, except that the ammonium perchlorate is not moisture-proof treated.

[0051] Comparative Example 3 The preparation steps in this comparative example are the same as those in Example 1, except that an existing adhesive is used, and the specific formulation of the adhesive is 5% polyvinyl alcohol + 95% aqueous solution.

[0052] The products obtained in Examples 1-6 and Comparative Examples 1-5 are subjected to the following performance tests, and the specific test results are shown in the following table:

[0053] As can be seen from the test results of Examples 1-3 in the above table, the micro-smoke launching charge of the present scheme has excellent performance, still has good moisture-proof characteristics after being stored for 12 months, has less smoke during ignition, has excellent compression column performance, has an ignition temperature of about 170°C, and has a burning rate of about 7-7.2 s / m.

[0054] From the test results of examples 4-6 in the above table, the smokeless firework propellant of the present scheme also has good performance, has good moisture-proof characteristics after 12 months of storage, has less smoke during ignition, has excellent compression column performance, has an ignition temperature of about 170℃, and has a burning rate of about 6.9-7s / m.

[0055] When the methenamine powder or ammonium perchlorate is not moisture-proof, as shown in the test results of comparative examples 1-2, the moisture absorption rate increases greatly after a period of storage, and other performance also deteriorates. Similarly, when other conventional binders are used, the performance of the smokeless propellant prepared by using the binders is also weakened.

[0056] Example 7 In the present example, the preparation steps and parameters are the same as those of example 1, and the difference lies in that the amounts of the components in the composite material are different, and the specific amounts are as follows:

[0057] The smokeless firework propellant of example 7 is subjected to performance detection, and the specific test results are shown in the following table:

[0058] From the test data of examples 7-4 in the above table, the amount ratio of the raw materials of the composite material in the smokeless firework propellant of the present scheme is preferably in the range of sulfur (1-1.5): polyethylene powder (2-2.5): glucose (0.5-2): moisture-proof methenamine powder (4.5-5), at which time the smokeless firework propellant has good moisture-proof performance, less smoke, and fast burning rate.

[0059] Example 8 In the present example, the preparation steps and parameters are the same as those of example 4, and the difference lies in that the amounts of the components in the composite material are different, and the specific amounts are as follows:

[0060] The smokeless firework propellant of example 8 is subjected to performance detection, and the specific test results are shown in the following table:

[0061] From the test data of examples 7-4 in the above table, the amount ratio of the raw materials of the composite material in the smokeless firework propellant of the present scheme is preferably in the range of sulfur powder (1-1.5): polyethylene powder (2-2.5): glucose (0.5-1): moisture-proof methenamine powder (4.5-5), at which time the smokeless firework propellant has good moisture-proof performance, less smoke, and fast burning rate.

[0062] Example 9 A micro-smoke nail bullet launching propellant, comprising, by weight percentage, the following raw materials mixed and then compressed, pulverized and dried: moisture-proof ammonium perchlorate 66.5%, composite material 8.5% (sulfur powder, polyethylene powder, glucose powder and moisture-proof hexamethylenetetramine powder are 1%, 2%, 1% and 4.5% respectively), single-base powder 5%, double-base powder 20%, and the amount of moisture-proof adhesive is 31% of the total weight of the dried raw materials; The moisture-proof adhesive is prepared by dissolving nitrocellulose 4%, single-base powder 0%, double-base powder 5%, stabilizer 1%, intermediate stabilizer 0.5% and organic solvent (acetone 8%, ethanol 81.5%).

[0063] The micro-smoke nail bullet launching propellant of Example 9 is subjected to performance detection, and the specific detection results are shown in the following table:

[0064] As shown in the test data in the above table, after the amount of each component is optimized, the performances of the micro-smoke nail bullet launching propellant are all excellent.

[0065] Example 10 A micro-smoke firework launching propellant, comprising, by weight percentage, the following raw materials mixed and then compressed, pulverized and dried: moisture-proof ammonium perchlorate 69.5%, composite material 8.5% (sulfur powder, polyethylene powder, glucose powder and moisture-proof hexamethylenetetramine powder are 1%, 2%, 1% and 4.5% respectively), hemp rod carbon powder 10%, single-base powder 5%, double-base powder 7%, and the amount of moisture-proof adhesive is 28% of the total weight of the raw materials. The moisture-proof adhesive is prepared by dissolving nitrocellulose 0%, single-base powder 0%, double-base powder 8%, stabilizer 0%, intermediate stabilizer 0.5% and organic solvent (acetone 6%, ethanol 85.5%).

[0066] The micro-smoke firework launching propellant of Example 10 is subjected to performance detection, and the specific detection results are shown in the following table:

[0067] As shown in the test data in the above table, after the amount of each component is optimized, the performances of the micro-smoke firework launching propellant are all excellent. The moisture absorption rate after long-term storage is 1%, the friction sensitivity is less than 60%, the impact sensitivity is less than 50%, the burning rate is 6.6 seconds / meter, and the ignition temperature is 170 degrees.

[0068] The above only describes the preferred embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields made according to the content of the present application, or the like, all fall within the patent protection scope of the present application.

Claims

1. A composite material, characterized in that The raw materials include sulfur powder, polyethylene powder and moisture-proof hexamethylenetetramine powder.

2. A composite material according to claim 1, characterized in that: The composite material also includes glucose powder.

3. A composite material according to claim 1, characterized in that: The moisture-proof hexamethylenetetramine powder is prepared by treating hexamethylenetetramine powder with an acetone and ethanol solution containing nitrocellulose and a moisture-proof agent, and then drying the treated hexamethylenetetramine powder.

4. A low smoke nail-shooting propellant, characterized in that: The composite material is made by mixing the following raw materials, and then pressing, crushing and drying them, based on weight percentage: 50-85% of moisture-proof ammonium perchlorate, 6-11% of the composite material according to claim 2, 1-15% of single-base powder and 1-25.5% of double-base powder; A moisture-proof adhesive is further added to the micro-smoke nail-shooting bullet propellant, and the amount of the moisture-proof adhesive added is 25-35% of the total weight of the raw materials of the micro-smoke nail-shooting bullet propellant after drying; The weight ratio of sulfur powder, polyethylene powder, glucose powder and moisture-proof hexamethylenetetramine powder in the composite material is (0-3): (1-3): (0-3): (1-6).

5. The low smoke nail-shooting propellant according to claim 4, characterized in that: The moisture-proof adhesive is prepared by dissolving 0-8% nitrocellulose, 0-8% single-base powder, 0-8% double-base powder, 0-1% stabilizer, 0-1% neutralizer and 80-94% organic solvent by weight percentage; The moisture-proof ammonium perchlorate is prepared by treating ammonium perchlorate with an acetone-ethanol solution containing nitrocellulose and a moisture-proof agent, and then drying the treated ammonium perchlorate.

6. The low smoke nail-shooting propellant according to claim 5, characterized in that: The stabilizer is diphenylamine; the neutralizer is dimethyldiphenylurea; and the organic solvent includes acetone and ethanol.

7. A fireworks smoke-removing propellant, characterized in that: The composite material is made by mixing the following raw materials, and then pressing, crushing and drying them, according to weight percentage: 50-85% of moisture-proof ammonium perchlorate, 4-12% of the composite material according to claim 2, 0.5-30% of hemp stalk carbon powder, 1-20% of single base powder, 1-20% of double base powder and 0-10% of aluminum powder; A moisture-proof adhesive is further added to the fireworks smoke-free propellant, and the amount of the moisture-proof adhesive added is 25-38% of the total weight of the raw materials of the fireworks smoke-free propellant after drying; The weight ratio of sulfur powder, polyethylene powder, glucose powder and moisture-proof hexamethylenetetramine powder in the composite material is (0-3): (1-4): (0-2): (4-9).

8. The fireworks light smoke propellant according to claim 7, characterized in that: The moisture-proof adhesive is prepared by dissolving 0-10% nitrocellulose, 0-10% single-base powder, 0-10% double-base powder, 0-1% stabilizer, 0-1% neutralizer and 85-92% organic solvent by weight percentage.

9. The fireworks light smoke propellant according to claim 8, characterized in that: The stabilizer is diphenylamine; the neutralizer is dimethyldiphenylurea; and the organic solvent includes acetone and ethanol.

10. The fireworks light smoke propellant according to claim 7, characterized in that: The moisture-proof ammonium perchlorate is prepared by treating ammonium perchlorate with a moisture-proof agent containing nitrocellulose, acetone, ethanol and a stabilizer, and then drying the treated ammonium perchlorate.

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