Fuel gas generating agent as well as preparation method and application thereof

Abstract

The invention discloses a fuel gas generating agent as well as a preparation method and application thereof, and belongs to the technical field of fuel gas generating agents. The fuel gas generating agent comprises the following raw material components in percentage by mass: 86-94% of 5-aminotetrazole nitrate, 3-5% of a catalyst, 3% of a binder and 0-10% of a regulator. The fuel gas generating agent has the advantages of being high in gas production rate, high in combustion speed, small in residue rate and moderate in combustion temperature, meets the requirements of a rapid inflation technology of a missile deformation wing thermosetting air bag for the fuel gas generating agent, and can be applied to thermosetting deformation missile wings to rapidly inflate the thermosetting deformation missile wings.

Description

Technical Field

[0001] The present invention relates to the technical field of gas generating agents, and in particular to a gas generating agent and a preparation method and application thereof. Background Art

[0002] In the wing deformation technology, the inflatable deformable wing structure has a small shrinkage volume, which saves missile space and can reduce the damage to the missile during flight and landing, and has good application prospects.

[0003] There are two main methods to maintain the rigidity of an inflatable airbag: one is the inflation and pressure-maintaining method; the other is the material solidification molding method. The inflation and pressure-maintaining method uses sufficient gas to maintain the rigidity of the airbag. Once the gas leaks, the airbag may deform, which is very fatal to missiles that require precise positioning and precision strikes. The material solidification molding method immediately solidifies the airbag after it is inflated and deployed. The airbag can obtain permanent rigidity without worrying about gas leakage and other problems. Therefore, it is more suitable for inflation and solidification of deformable missile wings.

[0004] In order to meet the requirements of fast inflation, high deformation accuracy and good reliability of thermosetting deformable missile wings, the following requirements are mainly met for the selection of inflation technology: (1) fast gas production speed; (2) ability to produce gas at a moderate temperature; (3) compact and light structure, not occupying too much missile space resources. Based on the above requirements, the traditional gas cylinder inflation method is obviously not able to meet them. The pyrotechnic gas generator technology with pyrotechnic gas propellant as the main charge has the characteristics of fast gas production, large gas production, simple structure and gas production temperature mostly between 800-1900℃, which is very suitable for the inflation of thermosetting deformable missile wings.

[0005] Pyrotechnic gas generator is a pyrotechnic agent that quickly produces a large amount of gas by burning. Similar to pyrotechnic powder, it is mainly composed of combustibles and oxidants. The former provides the fuel required for combustion, and the latter provides the oxygen required for combustion, thus forming a self-oxygen supply system without the need for additional oxygen supply.

[0006] It has been nearly 30 years since the gas generator developed from the initial azide-type combustible to the current nitrogen-rich combustible. Due to the high toxicity of azide-type gas generators, which is very unfavorable for production and use, it has been gradually eliminated. In recent years, with the rapid development of nitrogen-rich compounds such as azoles, oxadiazine, and guanidine, using them as combustibles for pyrotechnic gas generators has gradually become the mainstream. Nitrogen-rich compounds have the advantages of high nitrogen content, rapid gas production, large gas production, mostly clean gases such as nitrogen, good thermal stability, and green environmental protection. They are very suitable for use in the field of gas generators and have gradually become the focus of people's attention. Although there are some gas generator products on the market, these existing gas generator systems have more or less defects such as slow gas production speed, too high or too low combustion temperature, low gas production, and high residue rate, which cannot meet the requirements of thermosetting deformable bomb wings. Therefore, it is very necessary to develop a gas generator with fast gas production speed, moderate combustion temperature, high gas production, and low residue rate. Summary of the invention

[0007] The purpose of the present invention is to provide a gas generating agent and its preparation method and application in view of the requirements of the rapid inflation technology of the thermosetting airbag of the deformable wing of the missile for the gas generating agent (rapid gas production, and the generated gas can reach the thermosetting airbag curing temperature of 600-1050°C, the structure is light, and it will not occupy too much space resources of the missile).

[0008] To achieve the above object, the present invention provides the following solutions:

[0009] One of the technical solutions of the present invention is a fuel gas generating agent, wherein the raw materials include the following components by mass percentage: 86-94% of 5-aminotetrazolyl nitrate (5-ATN), 3-5% of catalyst, 3% of binder and 0-10% of regulator.

[0010] 5-ATN does not require the addition of an oxidant. The oxygen atoms contained in itself and in the air can supply its combustion. It also produces a large amount of gas, has a low combustion temperature, and a fast combustion speed.

[0011] Further preferably, the raw material composition is, by mass percentage, 92% of 5-aminotetrazolyl nitrate, 5% of catalyst, and 3% of binder.

[0012] Further preferably, the raw material composition is, by mass percentage, 84-92% of 5-aminotetrazolyl nitrate, 3% of catalyst, 3% of binder, and 2-10% of regulator.

[0013] Further preferably, the raw material composition is, by mass percentage, 86% of 5-aminotetrazole nitrate, 3% of catalyst, 3% of binder, and 8% of regulator.

[0014] Furthermore, the catalyst is copper oxide (CuO).

[0015] Copper oxide can improve the pre-ignition reaction activity of the 5-ATN combustion reaction and increase the thermal decomposition rate, thereby reducing the reaction time. Therefore, the present invention selects copper oxide as the catalyst of the gas generating agent.

[0016] Furthermore, the regulator is ammonium oxalate, ammonium carbonate or ammonium bicarbonate.

[0017] Furthermore, the binder is phenolic resin.

[0018] Phenolic resin has good bonding performance and can be firmly combined with other components of the gas generator; phenolic resin has good process performance and is easy to mix evenly with the components of the gas generator, does not release heat during curing and does not produce volatile substances; phenolic resin will not have a significant impact on the gas production performance of the gas generator, has good physical and chemical stability, and can provide combustible elements such as C and N required for combustion; phenolic resin has good mechanical properties after curing, so that the agent has a long storage time and is easy to transport; therefore, the present invention selects phenolic resin as the binder of the gas generator.

[0019] The second technical solution of the present invention: a method for preparing the above-mentioned gas generating agent, comprising the following steps: drying, grinding and sieving 5-aminotetrazole nitrate, a catalyst and a regulator respectively; weighing the sieved 5-aminotetrazole nitrate, the catalyst and the regulator according to the raw material ratio and mixing them evenly to obtain a mixture; dissolving a binder in alcohol, adding it dropwise to the mixture, stirring, and obtaining a wet-mixed agent; extruding the wet-mixed agent through a sieve, heating and curing, and obtaining the gas generating agent.

[0020] Furthermore, the screening after grinding is through a 60-mesh sieve; the sieve used to extrude the wet-mixed medicine through the sieve is a 10-mesh sieve.

[0021] Furthermore, the heating curing temperature is 50° C. and the time is 72 hours.

[0022] Furthermore, the 5-aminotetrazole nitrate, catalyst and regulator weighed and screened according to the raw material ratio and mixed evenly to obtain a mixture includes: weighing and screened 5-ATN and CuO according to the raw material ratio and premixing the two, passing the premixed raw materials through a 40-mesh sieve, repeating the sieving 4-5 times for sufficient mixing to obtain a mixture.

[0023] The third technical solution of the present invention: an application of the above-mentioned gas generating agent in the inflation of thermosetting deformable bomb wings.

[0024] The requirements for gas generating agents are nothing more than: high gas production, suitable combustion temperature, high combustion speed and low residue rate. However, the above performance characteristics sometimes have a restrictive relationship, and one increases while the other decreases. The present invention controls the composition and ratio of raw materials to make the components cooperate with each other, thereby obtaining a gas generating agent with better performance than the above.

[0025] The present invention discloses the following technical effects:

[0026] The gas generator of the present invention has the following advantages: 1) Large gas production. While saving the amount of medicine used, it can also reduce the volume of the gas generator and save space. 2) Moderate combustion temperature. Due to the particularity of the airbag material, the combustion temperature cannot be too low, otherwise it may not be able to reach the solidification temperature of the airbag. At the same time, the combustion temperature cannot be too high, otherwise it will damage the airbag and increase the cooling cost. The combustion temperature of the gas generator of the present invention is between 600-1050°C, which can meet the airbag inflation requirements without further cooling. 3) Moderate gas production speed. Rapid inflation can be achieved under the premise of ensuring safety and not causing detonation. 4) Less residue, better stability, etc., easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 This is a diagram of the closed blaster experimental system;

[0029] Figure 2 This is a schematic diagram of a gas production test device;

[0030] Figure 3 Schematic diagram of the combustion temperature test device. DETAILED DESCRIPTION

[0031] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as limiting the present invention, but should be understood as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0032] It should be understood that the terms described in the present invention are only for describing special embodiments and are not intended to limit the present invention. In addition, for the numerical range in the present invention, it should be understood that each intermediate value between the upper and lower limits of the scope is also specifically disclosed. Each smaller range between the intermediate value in any stated value or stated range and any other stated value or intermediate value in the described range is also included in the present invention. The upper and lower limits of these smaller ranges can be independently included or excluded in the scope.

[0033] Unless otherwise indicated, all technical and scientific terms used herein have the same meanings as those generally understood by those skilled in the art. Although the present invention describes only preferred methods and materials, any methods and materials similar or equivalent to those described herein may also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials associated with the documents. In the event of a conflict with any incorporated document, the content of this specification shall prevail.

[0034] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments of the present invention description without departing from the scope or spirit of the present invention. Other embodiments derived from the present invention description will be apparent to those skilled in the art. The present application description and examples are exemplary only.

[0035] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0036] Except for 5-ATN, all raw materials used in the following examples and comparative examples are common commercial products; the "%" involved represents mass percentage.

[0037] The preparation method of 5-ATN used in the following examples and comparative examples is as follows: at 20°C, a certain amount of 5-AT·H2O (the mass volume ratio of 5-AT·H2O to water is 1 g:3 mL) is dissolved in water, and concentrated nitric acid (mass fraction 65%) of the same volume as water is slowly added, and the mixture is reacted for 15 minutes while stirring. The mixture is cooled naturally at room temperature, and crystals are gradually precipitated, filtered, washed with ice water, and dried at 50°C.

[0038] Example 1

[0039] The raw material composition of the gas generating agent is: 5-ATN 94%, CuO 3%, and phenolic resin 3%.

[0040] The preparation method is as follows: first, 5-ATN and CuO are dried in an oven at 50°C, left to cool, and then fully ground and passed through a 60-mesh sieve for later use. According to the raw material ratio, the sieved 5-ATN and CuO are weighed and premixed, and the premixed raw materials are passed through a 40-mesh sieve, and the sieving is repeated 5 times for full mixing to obtain a mixture. After the phenolic resin is dissolved in alcohol (the amount of alcohol used can completely dissolve the phenolic resin), it is added dropwise to the mixture and fully stirred to obtain a wet-mixed agent, and then the wet-mixed agent is extruded through a 10-mesh sieve to obtain cylindrical rough granules with a diameter of about 4 mm, and then the granules are heated and cured in a 50°C constant temperature box for 72 hours to obtain a gas generating agent product (the surface of the granules is rough after drying, so the combustion area is larger, and the combustion speed is faster).

[0041] Example 2

[0042] The raw material composition of the gas generating agent is: 5-ATN 92%, CuO 5%, and phenolic resin 3%.

[0043] The preparation method is the same as Example 1.

[0044] Example 3

[0045] The raw material composition of the gas generating agent is: 5-ATN 92%, CuO 3%, phenolic resin 3%, and ammonium oxalate 2%.

[0046] The preparation method is the same as Example 1.

[0047] Example 4

[0048] The raw material composition of the gas generating agent is: 5-ATN 88%, CuO 3%, phenolic resin 3%, and ammonium oxalate 6%.

[0049] The preparation method is the same as Example 1.

[0050] Example 5

[0051] The raw material composition of the gas generating agent is: 5-ATN 86%, CuO 3%, phenolic resin 3%, and ammonium oxalate 8%.

[0052] The preparation method is as follows: first, 5-ATN, CuO and the regulator ammonium oxalate are placed in an oven at 50°C for drying, and then fully ground after standing and cooling, and passed through a 60-mesh sieve for use. According to the raw material ratio, the sieved 5-ATN, CuO and ammonium oxalate are weighed and premixed, and the premixed raw materials are passed through a 40-mesh sieve, and the sieving is repeated 5 times for full mixing to obtain a mixture. After dissolving the phenolic resin in alcohol, it is added dropwise to the mixture and fully stirred to obtain a wet-mixed agent, and then the wet-mixed agent is extruded through a 10-mesh sieve to obtain cylindrical rough granules with a diameter of about 4 mm, and then the granules are heated and cured in a 50°C constant temperature box for 72 hours to obtain a gas generating agent product (the surface of the granules is rough after drying, so the combustion area is larger, and the combustion speed is faster).

[0053] Example 6

[0054] The raw material composition of the gas generating agent is: 5-ATN 84%, CuO 3%, phenolic resin 3%, and ammonium oxalate 10%.

[0055] The preparation method is the same as Example 5.

[0056] Example 7

[0057] The raw material composition of the gas generating agent is: 5-ATN 86%, CuO 3%, phenolic resin 3%, and ammonium carbonate 8%.

[0058] The preparation method is the same as Example 5.

[0059] Example 8

[0060] The raw material composition of the gas generating agent is: 5-ATN 86%, CuO 3%, phenolic resin 3%, and ammonium bicarbonate 8%.

[0061] The preparation method is the same as Example 5.

[0062] Comparative Example 1

[0063] The raw material composition of the gas generating agent is: 5-ATN 96%, CuO 1%, and phenolic resin 3%.

[0064] The preparation method is the same as Example 1.

[0065] Comparative Example 2

[0066] The raw material composition of the gas generating agent is: 5-ATN 90%, CuO 7%, and phenolic resin 3%.

[0067] The preparation method is the same as Example 1.

[0068] Effect verification

[0069] 1. Gas production rate (combustion rate)

[0070] A closed explosion device is a device that uses a pressure sensor to test the relationship curve between pressure and time in the combustion gas in a constant volume, high pressure closed space. The relevant parameters such as the combustion rate, gas production and maximum combustion pressure value of the gas generator can be converted through the pressure-time curve calculation.

[0071] The volume of the closed explosive used in this experiment is 100mL, the working pressure range is 0-100MPa, the AK-2A strain gauge pressure sensor is used, the working linear equation is y=0.499760P+0.002537, and a data is recorded every 200ms through an oscilloscope.

[0072] Experimental system such as Figure 1 The experimental process is as follows: weigh the sample to be tested, put it into a closed explosion device, and Figure 1 The connections are as shown, the agent is ignited by the electric ignition head, the gas pressure generated by the combustion transmits an electrical signal through the pressure sensor, and is amplified by the signal amplifier. The signal is transmitted to the oscilloscope, displayed and recorded by the oscilloscope.

[0073] The burning rate of the gas generant is affected by its composition, density, and external temperature and pressure. It conforms to the combustion law of general propellants and can be expressed by the Vieille empirical equation (Formula (1)):

[0074] v-upn(1)

[0075] Where: v is the burning velocity, in mm / s;

[0076] μ is the burning rate coefficient of the gas generating agent;

[0077] p is the combustion chamber pressure, in MPa;

[0078] n is the burning rate pressure index.

[0079] The burning rate pressure index reflects the sensitivity of the burning rate of the gas generant to the influence of pressure. In the field of solid propellants and propellants, in order to ensure that the propellants can work stably, the burning rate is required to be insensitive to changes in pressure, so the burning rate pressure index needs to be as small as possible.

[0080] At the same time, for a pyrotechnic charge that can be burned in parallel layers, its burning rate is a function of the thickness of the burning layer relative to time, and its speed can also be expressed as formula (2):

[0081]

[0082] Where: v is the combustion velocity of the gas generating agent, in mm / s;

[0083] l is the length of the tested gas generant, in mm;

[0084] t is the burning time in seconds.

[0085] From formula (1) and formula (2), we can get formula (3):

[0086] dl=μp n dt (3)

[0087] Integrating both sides of formula (3) yields formula (4):

[0088]

[0089] For gas generants, the burning rate coefficient and pressure index can be regarded as constants within a certain pressure range, so the above formula can be solved by testing the pressure-time value of two gas generant columns of different lengths in a closed explosive device. That is:

[0090]

[0091] In the formula: l1 and l2 are the lengths of the test agent, which can be accurately measured in the experiment, Δt1 and Δt2 are time intervals, which are the point intervals of the Pt curve in the experiment, and k is the number of points. The pressure corresponding to each point is known through the Pt test, so the burning rate pressure index n can be obtained by substituting each experimental value into formula (5), and the burning rate coefficient μ can be obtained by substituting the value of n into formula (4). This experiment uses the closed explosive differential pressure method to test the burning rate pressure index. This method first coats the drug strip, which allows the drug to burn in parallel layers during the combustion process, so it can simulate the linear combustion process of pyrotechnics, and the calculation results are accurate.

[0092] The test calculation process of the burning rate equation is as follows: First, use a rectangular medicine pressing mold to press the gas generator into a 8mm×8mm×100mm medicine strip shape under a hydraulic press. To ensure that the density of the medicine strips is the same, the 100mm medicine strips are cut into two medicine strips of 60mm and 40mm in length. The outside of the medicine strips is coated with zinc oxide tape to ensure that the agent burns in parallel layers during the combustion process. Then, the medicine strips of different lengths are placed in a 100mL closed detonator for pressure-time curve testing. The above numerical calculation is performed on the test results to obtain the burning rate equation of the gas generator. The burning rate test results of the gas generator prepared in each embodiment are shown in Table 1.

[0093] 2. Gas production test

[0094] The gas production is tested by the drainage method. This method is to transfer the gas produced by combustion to a container upside down in water through a pipe after cooling, and measure the gas volume in the container to obtain the gas production of the gas generator. Since the generated gas is first filtered and cooled in water, the measured gas production is the dry gas production. The schematic diagram of the test device is shown in the figure. Figure 2 shown.

[0095] The test process is to first fill the gas collecting bottle with water, seal its entrance with a glass sheet or other smooth-surfaced object, and then carefully immerse it in water. The water level in the gas collecting bottle must not be reduced during the operation. Then connect the gas outlet of the gas generator to the heat-resistant hose, and carefully insert the other end of the heat-resistant hose into the gas collecting bottle. Weigh about 1g of gas generator and load it into the gas generator. Ignite the gas generator. The gas generated by the gas generator quickly discharges the water in the gas collecting bottle. After complete combustion, carefully remove the gas generator and the heat-resistant hose, and then seal the outlet of the gas collecting bottle and take it out. Measure the volume of water discharged by the gas in the gas collecting bottle to obtain the gas production volume of the gas generator. Repeat the experiment 5 times, take the measured value with a deviation of no more than 0.05mL / g, and calculate its average value as the gas production volume of the gas generator. The gas production test results of the gas generator prepared in each embodiment are shown in Table 1.

[0096] 3. Combustion temperature test

[0097] The combustion temperature refers to the highest temperature when the gas generant burns. The combustion temperature is an important parameter for evaluating the performance of the gas generant and can also provide a basis for establishing a combustion model and analyzing the combustion mechanism. If the temperature is too low, the airbag cannot be deployed, which requires high temperature to deform and deploy. If the temperature is too high, it will exceed the heat resistance limit of the airbag and damage the airbag.

[0098] The combustion temperature is measured by igniting the gas generator in an open space using a K-type thermocouple. The experimental schematic diagram is shown in Figure 3 As shown. A MIK-R200D paperless recorder is used to record every 100ms, the thermocouple range is 0-1300℃ (short-term over-range measurement is possible), and the experiment uses a hollow straight cylinder with a diameter of about 1.5cm and a charge of about 3g. An ignition wire is inserted in the middle of the agent. During the experiment, the ignition wire is ignited, and the temperature during combustion is measured by the thermocouple, which is transmitted to the paperless recorder through current for recording. The combustion temperature test results of the gas generating agent prepared in each embodiment are shown in Table 1.

[0099] 4. Residue rate test

[0100] The residue rate refers to the percentage of the solid mass of the product after the combustion of the gas generator to the total mass of the gas generator, expressed in W. RIndicates. If the residue rate in the gas generator is too high, it will be detrimental to the actual use of the gas generator. When filling the airbag, it will contaminate the airbag and make the airbag unusable. The residue rate test is to ignite the gas generator in a closed detonator. After the test is completed, the remaining solid residue in the closed detonator is collected, dried, and weighed. The residue rate is calculated using formula (6). The experiment is repeated three times, and the average value is calculated as the final result. The residue rate test results of the gas generator prepared in each embodiment are shown in Table 1.

[0101]

[0102] Where: m1 is the amount of solid residue after sample combustion, g;

[0103] m0 is the mass of the gas generating agent, g.

[0104] Table 1

[0105]

[0106] It can be seen from Table 1 that the gas generating agents of Examples 1-8 of the present invention have the advantages of high gas production, fast burning rate, small residue rate and moderate combustion temperature, which meet the requirements of the rapid inflation technology of thermosetting airbags of missile deformable wings for gas generating agents, and can be applied to thermosetting deformable missile wings to quickly inflate thermosetting deformable missile wings.

[0107] By comparing the data of Example 1-2 and Comparative Example 1-2, it can be found that in the formula without adding a regulator, the gas production of the gas generator increases first and then decreases with the increase of copper oxide. The gas production is the highest at 5%, and then gradually decreases. Although 3% is slightly lower than 5%, it is also a relatively high gas production level. When the addition amount exceeds 5%, the catalytic effect is no longer obvious. This is because although the catalyst content is high, the combustible content is gradually reduced, which leads to a decrease in the maximum gas production. The above phenomenon shows that when the addition amount of copper oxide is 5%, the catalytic efficiency is the highest without adding a regulator. The burning rate also increases first and then decreases with the increase of copper oxide. This is because the ignition energy of copper oxide is lower than that of 5-ATN. Properly increasing copper oxide can catalyze the pre-ignition activity of the gas generator and reduce the pre-ignition reaction time, thereby reducing the combustion time and increasing the burning rate. However, when the copper oxide content is further increased, the ignition energy required for the gas generator becomes larger, and its own catalytic effect is no longer obvious, so that the gas production time increases, that is, the burning rate decreases. Comprehensive consideration shows that in the formula without adding a regulator, the catalytic effect is best when 5% copper oxide catalyst is added, followed by 3%. Therefore, in the formula without adding a regulator, 5% is selected as the optimal amount of copper oxide.

[0108] Due to the particularity of the airbag material, the combustion temperature cannot be too low, otherwise it may not reach the solidification temperature of the airbag. At the same time, the combustion temperature cannot be too high, otherwise it will damage the airbag and increase the cooling cost. In addition, although the gas production speed is required to be fast when inflating the missile deformable wing thermosetting airbag, the speed cannot be too fast at the same time, which will cause detonation and increase the difficulty of device design (generally required temperature is 600-1050℃). Although Example 1-2 without a regulator can also meet the above requirements, the combustion temperature is at the upper limit of the requirement, and the burning rate is relatively fast, which may cause safety hazards and require higher quality of the airbag. Therefore, on the basis of Example 1-2, a regulator is further added to the gas generant to adjust the performance of the gas generant.

[0109] In the case of adding a regulator, the addition of the additive leads to a decrease in the 5-ATN content in the combustion generator, which may lead to a decrease in the maximum gas production. In the formula without adding a regulator, the copper oxide dosage of 3% and 5% has a relatively good effect. Therefore, the dosage of copper oxide was appropriately reduced, and 3% was selected as the dosage of copper oxide. On this basis, the effect of the regulator on the performance of the gas generator was further explored.

[0110] By comparing the data of Examples 2-8 to which a regulator (ammonium oxalate, ammonium carbonate or ammonium bicarbonate) is added with that of Examples 1-2 to which no regulator is added, it can be found that the addition of the regulators ammonium oxalate, ammonium carbonate or ammonium bicarbonate reduces the combustion temperature and combustion rate. This is because ammonium oxalate, ammonium carbonate, ammonium bicarbonate and other substances will decompose endothermically under the high temperature generated by the combustion of the gas generator, and the absorption of heat reduces the heat of the gas generated when the entire gas generator formula is burned, so the combustion temperature will be reduced and the combustion rate will also be reduced. In addition, although the addition of the regulator leads to a reduction in the 5-ATN content in the combustion generator, which may lead to a reduction in the maximum gas production, since ammonium oxalate, ammonium carbonate, ammonium bicarbonate and other substances will also produce gas during the endothermic decomposition process, it compensates to a certain extent for the reduction in gas production caused by the reduction in 5-ATN content. Therefore, even if the formula system can still maintain a high gas production.

[0111] Moreover, by comparing the data of Examples 2-8, it can be found that the higher the amount of the regulator is, the better it is. If the content of the regulator is too high, the combustion temperature and the combustion rate will be reduced too much, and the gas production will be greatly reduced due to the significant reduction in the 5-ATN content. In addition, when the amount of the regulator is too high, due to insufficient combustion oxygen, part of the regulator will form carbonization, thereby increasing the residue. The best effect is achieved when the amount of the regulator is 8%.

[0112] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A gas generating agent, characterized in that: The raw materials include the following components by mass percentage: 86-94% of 5-aminotetrazolyl nitrate, 3-5% of catalyst, 3% of binder and 0-10% of regulator.

2. The gas generating agent according to claim 1, characterized in that: The raw material composition is as follows by mass percentage: 92% of 5-aminotetrazolyl nitrate, 5% of catalyst and 3% of binder.

3. The gas generating agent according to claim 1, characterized in that The raw material composition is as follows by mass percentage: 86% of 5-aminotetrazolyl nitrate, 3% of catalyst, 3% of binder and 8% of regulator.

4. The gas generating agent according to any one of claims 1 to 3, characterized in that: The catalyst is copper oxide.

5. The gas generating agent according to claim 1 or claim 3, characterized in that: The regulator is ammonium oxalate, ammonium carbonate or ammonium bicarbonate.

6. The gas generating agent according to any one of claims 1 to 3, characterized in that: The binder is phenolic resin.

7. A method for preparing a gas generating agent according to claim 3, characterized in that: The method comprises the following steps: drying, grinding and sieving 5-aminotetrazolyl nitrate, a catalyst and a regulator respectively; The sieved 5-aminotetrazole nitrate, catalyst and regulator are weighed and mixed uniformly according to the raw material ratio to obtain a mixture; the binder is dissolved in alcohol, and then added dropwise to the mixture, and stirred to obtain a wet-mixed agent; the wet-mixed agent is squeezed through a sieve, heated and solidified to obtain the gas generating agent.

8. The preparation method according to claim 7, characterized in that: The sieving after grinding is through a 60-mesh sieve; the sieve used to extrude the wet-mixed medicine through the sieve is a 10-mesh sieve.

9. The preparation method according to claim 7, characterized in that: The heating curing temperature is 50° C. and the time is 72 hours.

10. Use of the gas generant as claimed in any one of claims 1 to 3 in the inflation of thermosetting deformable missile wings.

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