WO2019119763A1

WO2019119763A1 - Ignition agent composition with reliable ignition performance and preparation method thereof

Info

Publication number: WO2019119763A1
Application number: PCT/CN2018/092734
Authority: WO
Inventors: 罗运强; 任响宁; 杜涛; 范智; 王晨; 周雄; 翟连峰; 任兴仑; 阮家声; 夏强
Original assignee: 湖北航鹏化学动力科技有限责任公司
Priority date: 2017-12-20
Filing date: 2018-06-26
Publication date: 2019-06-27
Also published as: CN108083959A

Abstract

Disclosed is an igniting agent composition having a reliable ignition performance and a preparation method thereof. The igniting agent composition comprises the following components with the following mass percentages: 40% to 60% of cerium nitrate, 25% to 40% of 5-aminotetrazole 5-AT, 1% to 20% of potassium nitrate, 1% to 20% of mica powder, 0.5% to 10% of aluminum oxide, 0.1% to 10% of graphite, and 0.1% to 10% of boron nitride. A tablet of the igniting agent composition does not stick to the mold during a tableting process, and the tablet can maintain the original gloss and morphology after the tableting process. The ignition delay or fluctuation of the igniting agent at a low temperature of -40 °C is improved. The area of effect is greater when the igniting agent acts at a temperature between -40 °C and +90 °C. In addition, the ignition of the igniting agent with a gas generating agent is more uniform, the consistency is better, and the ignition performance is remarkably improved.

Description

Ignition agent composition with reliable ignition performance and preparation method thereof

The present application claims priority to Chinese Patent Application No. 201711386662.7, filed on Dec. 20, 2017, which is entitled "Ignition of a igniting agent with reliable ignition performance and its preparation method", the entire contents of which are incorporated herein by reference. This is incorporated herein by reference.

Technical field

The invention relates to a igniting agent composition with reliable ignition performance and a preparation method thereof, in particular to an ignition medicinal composition with reliable ignition performance, in particular, a reliable and consistent ignition performance at a temperature of -40 ° C, belonging to an automobile The field of airbag technology.

Background technique

As we all know, with the development of highways and the improvement of vehicle performance, the speed of cars is getting faster and faster, making traffic accidents of vehicles more frequent. Therefore, airbag systems, which are an important part of passive safety of automobiles, are particularly important. A very important component of the airbag system is the gas generator, which acts to produce a sufficient volume of gas at a sufficiently fast rate to supply the airbag in a short period of time. A car airbag is one or more inflators that are installed inside or behind the car and inside the car interior and inside the car interior to protect the driver and the occupant from critical parts and to mitigate the damage caused by the impact.

The pyrotechnic gas generator is mainly composed of an ignition system, a combustion system, a filtering system and a supporting member, and has the main advantages of simple structure, rapid inflation (30ms to 50ms), good safety (normally in a normal pressure state), and long storage time. (greater than 15 years) and so on. The design of the ignition system in this gas generator is a key technology. The output energy of the ignition system is insufficient, so that the gas generating agent cannot be burned normally and quickly, so that the airbag cannot be normally opened to protect the occupant; on the contrary, the pressure of 10ms is too large, and the air bag is directly Fly. Therefore, it is necessary to optimize the ignition performance of the pyrotechnic gas generator, which can effectively protect the life safety of the occupants in traffic accidents, and reduce the huge losses caused by the abnormal ignition of the generators to the automobile manufacturers.

The ignition process of the pyrotechnic gas generator is a process from the start of the generator to the time of stable operation. It is generally divided into three parts:

a) The smoldering stage of the electric squib: the ignition command output when the car collides, the bridge wire is heated, the thermal powder is ignited, and the reinforced drug is ignited;

b) The flame generated during the ignition phase ignites the ignition powder: the ignition powder generates high-temperature and high-pressure gas after combustion, which contains a certain amount of hot particles, and the pressure is about several to several tens of atmospheric pressure;

c) Ignition of the ignition gas to the surface of the gas generating agent: to increase the surface temperature of the gas generating agent, first start the ignition from the place of heating to the ignition temperature until the gas generating agent is normally burned, and the ignition process is completed.

Ignition drugs currently have black powder type, 5AT and lanthanum nitrate type, and B/KNO ₃ type. Since the ignition powder needs to ignite the gas-producing drug, there are certain requirements for the ignition temperature, energy, and residue particles of the ignition powder, so as to ensure a certain ignition reliability. Black powder is a traditional ignition powder, which has the characteristics of low price, but its energy is too low, and the combustion products are mainly gas and have few residues. It is suitable for application scenarios where ignition delay time is not required, and general requirements for gas generators. The delay time is less than 10ms, so black powder is rarely used as a ignition powder in gas generators; although 5AT and yttrium nitrate type ignition drugs have improved energy, since 5AT and lanthanum nitrate are temperature sensitive substances, at low temperature -35 ° C The use of ignition delay is prone to occur, and the performance of the generator at low temperatures is much different from that at high temperatures and normal temperatures. The use of such ignition drugs requires special design of the airbag gas generator to compensate for low temperature ignition through structural improvements. Delay problem; B/KNO ₃ type ignition powder has the advantages of high energy, high combustion temperature, and many residual particles. It is currently widely used as an ignition powder on airbag gas generators, but it is expensive, and the potassium nitrate content in the formula is usually Can reach more than 70%, a large amount of potassium oxide exhaust gas generator after combustion, easy to guide The harmful substances in the gas components are exceeded. The frictional impact sensitivity of such formulations is very high, easy to break out, and the safety is poor during the molding process. At the same time, due to the high hardness of boron, molding is very difficult, the mold is seriously worn, and the manufacturing cost is high. The above ignition powder is usually pressed into small tablets in the manufacturing process, and some need to be broken into granules, then the ignition powder formula containing aluminum powder is significantly higher than the aluminum powder-free, so that the granulation process is certain The safety risk is also high in the cost of aluminum powder. In addition, after the ignition of the ignition powder, the aluminum oxide residue is more, and the solid content of the formulation is also increased.

For example, the patent US6487974B1 mainly contains 5AT26%, bismuth nitrate 64%, aluminum powder 7%, boron nitride 1%, and 7% aluminum powder is helpful for low temperature ignition performance, but its content is high, and the sensitivity of aluminum powder is low. There is a certain risk in the process, especially in the tableting and granulation process, and the patent does not play a good role in film removal. Therefore, at present, for the airbag gas generator, several kinds of ignition drugs commonly used have their own defects.

Summary of the invention

SUMMARY OF THE INVENTION The object of the present invention is to overcome the above-mentioned deficiencies of the prior art and to provide an igniting agent composition which is reliable in ignition performance, which makes the tablet not adhere to the tablet during tableting, and the tablet can be well preserved after tableting. Some luster and shape improve the ignition delay or fluctuation of ignition powder at low temperature -40 °C, ensuring that the ignition powder has a wider range of operation when operating at -40 ° C ~ +90 ° C temperature, and in the ignition gas When the agent is generated, the ignition is more uniform, the consistency is better, and the ignition performance is remarkably improved.

Another object of the present invention is to provide a method for preparing an ignition agent composition which is reliable in ignition performance.

The above object of the present invention is mainly achieved by the following technical solutions:

A igniting agent composition having a reliable ignition performance, comprising the following components in mass percent content:

In the above-described ignition performance-reliable ignition agent composition, it is preferred to include the following components in a mass percentage content:

In the above ignition property composition having reliable ignition performance, the 5-aminotetrazole has a particle diameter D90 of not more than 30 μm.

In the above ignition property composition having reliable ignition performance, the boron nitride has a particle diameter D90 of not more than 3.0 μm.

In the above ignition property composition having reliable ignition performance, the potassium nitrate has a particle diameter D90 of not more than 165 μm.

In the above ignition property composition having reliable ignition performance, the sum of the water contents of the components of the ignition agent composition is not more than 1% of the total mass of each component.

In the above-described igniting agent composition having a reliable ignition performance, each component mixture is prepared into particles having a water content of less than 0.5% before compression molding.

In the ignition composition having reliable ignition performance, the ignition agent composition is a circular sheet structure having a diameter of 3 to 10 mm; and the thickness of the circular sheet structure is 1 to 5 mm. The mass of each circular sheet structure is 0.01 to 3 g.

In the above igniting agent composition having reliable ignition performance, the igniting agent composition has a granular structure and has a particle diameter of 12 to 20 mesh.

In the above method for preparing an ignition composition having reliable ignition performance, an ignition agent composition is prepared by wet granulation.

The preparation method of the above ignition performance reliable ignition agent composition, the specific preparation method comprises the following steps:

(1) mixing cerium nitrate, 5-aminotetrazole, potassium nitrate, mica powder, aluminum oxide, graphite and boron nitride to obtain a first material;

(2), the first material is added with water for wet mixing to obtain a second material, wherein the amount of water added is 3% to 15% of the total mass of the first material;

(3), the second material is passed through a screen of 10 to 40 mesh to obtain a third material;

(4) drying the third material to a moisture content of less than 0.5% of the total mass of the third material, and again obtaining a fourth material through a screen of 10 to 40 mesh;

(5), the fourth material is formed into a material.

In the above preparation method of the ignition performance reliable ignition agent composition, in the step (1), cerium nitrate, 5-aminotetrazole, potassium nitrate, mica powder, aluminum oxide, graphite and boron nitride are mixed. Mixing in the apparatus to obtain the first material, the mixing time is ≤ 20 min; the mixing device is a ribbon mixer.

In the above preparation method of the ignition performance reliable ignition agent composition, the wet mixing time in the step (2) is 2 min to 15 min; and the wet mixing device is a kneader or a mixer.

In the above preparation method of the ignition property composition with reliable ignition performance, in the step (5), the fourth material is molded by a rotary tableting machine.

In the preparation method of the above-mentioned ignition performance reliable ignition agent composition, the material in the step (5) is molded to obtain a circular sheet structure having a diameter of 3 to 10 mm; a circular sheet structure. The thickness is 1 to 5 mm; the mass of each circular sheet structure is 0.01 to 3 g.

In the above method for preparing a igniting agent composition with reliable ignition performance, the material in the step (5) is shaped to obtain a granular structure, the granular structure having a particle diameter of 12 to 20 mesh; and the granular structure is a sheet-like structure After granulation, it is sieved.

Compared with the prior art, the invention has the following beneficial effects:

(1) The present invention provides a novel ignition agent composition comprising cerium nitrate, 5-aminotetrazole, potassium nitrate, mica powder, alumina, graphite and boron nitride, the ignition agent composition making the tablet The tablet does not stick to the mold during the tableting process. After tableting, the tablet can maintain the original gloss and shape well, and the surface has no pits and no burrs. It improves the ignition delay or fluctuation of the ignition powder at low temperature -40 °C. It ensures that the ignition powder has a wider range when it is operated at -40 ° C ~ +90 ° C temperature, and the ignition is more uniform when the gas generating agent is ignited, the consistency is better, and the ignition performance is remarkably improved.

(2) The igniting agent composition of the present invention contains graphite and boron nitride as a process aid together, and the synergistic effect of the two in the composition of the present invention is indispensable, and by studying the ratio of the two, and combining The reasonable choice of the amount of the material makes the tablet of the composition not stick to the mold during the tableting process, and the tablet can maintain the original luster and shape after the tableting, and the surface has no pits and no burrs;

(3) The ignition agent composition of the invention contains aluminum oxide as an ignition improver, and the reasonable selection of the dosage improves the ignition delay or fluctuation of the ignition powder at a low temperature of -40 ° C, thereby ensuring that the ignition powder is The range of application is wider when working at temperatures from -40 ° C to +90 ° C. At the same time, the addition of aluminum oxide makes the ignition of the gas generating agent more uniform and consistent, further improving the ignition performance of the igniter composition. In addition, the present invention improves the low temperature ignition performance by adding safe and reliable aluminum oxide, thereby substantially increasing the safety performance of the formulation;

(4) The ignition composition of the present invention contains a certain amount of potassium nitrate, which is used together with cerium nitrate and 5-aminotetrazole. Potassium nitrate and cerium nitrate are oxidizing agents, which are oxygen sources for the ignition agent formulation, and 1 g of potassium nitrate can be used. The amount of oxygen released from the oxide oxidant is more than 0.4g to 0.5g, and the present invention further increases the burning rate and flame temperature of the igniting agent by research and experiment, adding a reasonable amount of potassium nitrate;

(5) The present invention performs the content ratio of each component including the cerium nitrate, 5-aminotetrazole, potassium nitrate, mica powder, aluminum oxide, graphite, and boron nitride in the ignition agent composition. The design is optimized and verified by a large number of tests, so that the ignition agent composition has excellent performance and remarkable effect, and the ignition agent composition ignites more uniformly when the gas generating agent is ignited, the consistency is better, and the ignition performance is remarkably improved.

(6) The igniting agent composition of the present invention is granulated by wet granulation before molding, and the granulation by wet granulation makes the process simpler, lower in cost, lower in energy consumption, more flexible in process, and low in equipment investment.

(7) The ignition agent composition of the present invention can reduce the sensitivity of the formulation by using boron nitride, mica powder, aluminum oxide, graphite, etc., and enhance the safety from the essence of the formulation;

(8) The present invention is used in the form of a granular structure by using an igniting agent composition to provide the maximum available combustion surface area for the fastest response, thereby rapidly igniting the gas generant composition to meet the needs of the airbag to protect the driver and the occupant. ;

(9), a large number of tests have shown that the ignition powder composition of the present invention is capable of rapidly igniting the gas generating agent in a temperature range from -40 ° C to +90 ° C; the ignition powder composition of the present invention has a combustion temperature of more than 2500 K; The gas production rate of the composition is 2.1 to 2.5 moles per 100 grams, while the gas yield of a typical BKNO3 enhancer composition is 1.13 moles per 100 grams of enhancer, and the gas yield of the aluminum powder-containing enhancer composition is 1.7. To 1.9 moles/100 grams; in addition, the ignition efficiency of the ignition agent composition of the present invention is increased by 69 to 110% over conventional ignition agent compositions.

DRAWINGS

Figure 1 is a view showing the surface morphology of an ignition agent composition tablet of Comparative Example 1 of the present invention;

Figure 2 is a view showing the surface morphology of the ignition agent composition tablet of Comparative Example 2;

Figure 3 is a graph showing the time and pressure of the ignition agent composition of Comparative Example 3 of the present invention;

Figure 4 is a view showing the surface morphology of an ignition agent composition tablet in Example 1 of the present invention;

Figure 5 is a graph showing the time and pressure of the ignition agent composition in Example 1 of the present invention;

Figure 6 is a view showing the surface morphology of an ignition agent composition tablet in Example 2 of the present invention;

Figure 7 is a graph showing the time and pressure of the ignition agent composition in Example 2 of the present invention;

Figure 8 is a view showing the surface morphology of an ignition agent composition tablet in Example 3 of the present invention;

Figure 9 is a graph showing the time and pressure of the ignition agent composition in Example 3 of the present invention;

Figure 10 is a view showing the surface morphology of an ignition agent composition tablet in Example 4 of the present invention;

Figure 11 is a graph showing time and pressure of an ignition agent composition in Example 4 of the present invention;

Figure 12 is a view showing the surface morphology of an ignition agent composition tablet in Example 5 of the present invention;

Figure 13 is a graph showing the time and pressure of the ignition agent composition in Example 5 of the present invention.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

The ignition agent composition with reliable ignition performance of the present invention comprises the following components in mass percentage:

In the above igniting agent composition, it is preferred to use a component having the following mass percentage: cerium nitrate 40% to 60%; 5-aminotetrazole (5-AT) 30% to 40%; potassium nitrate 4% to 15%; Mica powder 5% ~ 15%; aluminum oxide 0.5% ~ 5%; graphite 0.1% ~ 5%; boron nitride 0.1% ~ 5%.

The particle diameter D90 of the above 5-aminotetrazole is not more than 30 μm; the particle diameter D90 of the above boron nitride is not more than 3.0 μm; and the particle diameter D90 of the above potassium nitrate is not more than 165 μm.

The sum of the water contents of the components of the above igniting agent composition is not more than 1% of the total mass of each component.

The above component mixtures are prepared into particles having a water content of less than 0.5% prior to compression molding.

The igniting agent composition may be a circular sheet structure having a diameter of 3 to 10 mm; a circular sheet structure having a thickness of 1 to 5 mm; and a weight of each of the circular sheet structures being 0.01 ~3g.

The igniting agent composition may also have a granular structure, which is obtained by granulating and sieving the sheet-like structure, and has a particle diameter of 12 to 20 mesh. It is preferred to use a granular structure.

The invention adopts the method of wet granulation to prepare the igniting agent composition, and the specific preparation method comprises the following steps:

(1) mixing cerium nitrate, 5-aminotetrazole, potassium nitrate, mica powder, aluminum oxide, graphite and boron nitride to obtain a first material; mixing may be carried out in a mixing device to obtain a first material, and mixing The time is ≤ 20 min; the mixing device can use a ribbon mixer.

(2) adding the first material to the wet process to obtain the second material, wherein the added water is 3% to 15% of the total mass of the first material; the wet mixing time is 2 min to 15 min; the wet mixing device It is a kneading machine or a mixer.

(5) The fourth material is formed into a material, and the material can be formed by a molding method of a rotary tableting machine, and then formed into a granular material by a rocking type particle machine.

The material in the step (5) is formed into a circular sheet structure or a granular structure, wherein the circular sheet structure has a diameter of 3 to 10 mm; the circular sheet structure has a thickness of 1 to 5 mm; each of the circular sheet structures The weight is 0.01 to 3 g; wherein the granular structure is obtained by granulating the sheet structure and then sieving, and the particle size is 12 to 20 mesh.

The igniting agent composition prepared by the present invention is mainly used for a car airbag gas generator.

The present invention also provides a gas generator using the above-described ignition-safety ignition composition as an ignition agent.

Comparative example 1:

The igniting agent composition comprises the following components in mass percent:

After the above components were weighed, they were pressed into a pellet having a diameter of 6.4 mm and a thickness of 2.7 to 3.1 mm by wet granulation and a rotary tableting machine. The specific preparation method comprises the following steps: mixing cerium nitrate, 5-aminotetrazole (5-AT), potassium nitrate, mica powder, aluminum oxide and graphite through a ribbon mixer to obtain a first material; adding the first material to the 8 % of distilled water is wet-kneaded for 20 min to obtain a second material, and the second material is passed through a 10-mesh screen to obtain a third material; the third material is dried and dried to a water content of less than 0.5% of the total mass of the third material. The fourth material is obtained again through the 10-mesh screen; the fourth material is formed into a material by a rotary tableting machine.

Fig. 1 is a view showing the surface morphology of the igniting agent composition of Comparative Example 1 of the present invention; in this comparative example, only graphite was added as a releasing agent, and boron nitride was not added. After being pressed by the rotary tableting machine, the surface of the tablet has a sticking mold, and the tablet does not maintain the original gloss and shape well, and the surface has pits and burrs.

Comparative example 2

These components were weighed and pressed into a pellet having a diameter of 6.4 mm and a thickness of 2.7 to 3.1 mm by wet granulation and a rotary tableting machine. The specific preparation method comprises the following steps: mixing cerium nitrate, 5-aminotetrazole (5-AT), potassium nitrate, mica powder, aluminum oxide and boron nitride through a ribbon mixer to obtain a first material; Adding 8% distilled water for wet kneading for 20 min to obtain a second material, and passing the second material through a 10-mesh sieve to obtain a third material; drying the third material to dryness until the water content is less than the total mass of the third material 0.5%, the fourth material was obtained again through a 10-mesh screen; the fourth material was formed into a material by a rotary tableting machine.

Fig. 2 is a view showing the surface morphology of the igniting agent composition of Comparative Example 2 of the present invention; in this comparative example, only boron nitride was added as a releasing agent, and no graphite was added. After being pressed into a tablet by a rotary press, the surface of the tablet has a sticking mold, and the tablet does not maintain the original gloss and shape well, and the surface has pits and burrs.

Comparative example 3

These components were weighed and pressed into a pellet having a diameter of 6.4 mm and a thickness of 2.7 to 3.1 mm by wet granulation and a rotary tableting machine. The specific preparation method comprises the following steps: mixing cerium nitrate, 5-aminotetrazole (5-AT), potassium nitrate and mica powder through a ribbon mixer to obtain a first material; adding the first material to 8% distilled water for wet kneading 20min, the second material is obtained, and the second material is passed through the 10-mesh screen to obtain the third material; the third material is dried, dried to a water content of less than 0.5% of the total mass of the third material, and passed through the 10-mesh screen again. A fourth material is obtained; the fourth material is formed by a rotary tableting machine.

Figure 3 is a graph showing the time and pressure of the ignition agent composition of Comparative Example 3 of the present invention; Table 1 is a time and pressure data table of the ignition agent composition of Comparative Example 3 of the present invention, including ignition time TTFG data statistics. It can be seen from Fig. 3 and Table 1 that the ignition composition has ignition delay at room temperature +23 ° C, high temperature +85 ° C, and low temperature -40 ° C, which affects the overall pressure performance and burning rate of the generator, and low temperature ignition. The time does not meet the requirement of less than 7ms.

Table 1

No aluminum oxide was added to this comparative example, and graphite and boron nitride were not added. After the test run, ignition delays occurred from -40 ° C to +90 ° C. And after the rotary tablet press is pressed, the surface of the tablet has a sticking mold, and the tablet can not maintain the original luster and shape well, and the surface has pits and burrs.

Example 1

These components were weighed and pressed into a pellet having a diameter of 6.4 mm and a thickness of 2.7 to 3.1 mm by wet granulation and a rotary tableting machine. The specific preparation method comprises the following steps: mixing cerium nitrate, 5-aminotetrazole (5-AT), potassium nitrate, mica powder, aluminum oxide, graphite and boron nitride through a ribbon mixer to obtain a first material; One material is added with 10% (mass percentage content) of distilled water for wet kneading for 12 min to obtain a second material, and the second material is passed through a 10-mesh sieve to obtain a third material; the third material is dried and dried to a water content. Less than 0.5% of the total mass of the third material, the fourth material is again obtained through the 20-mesh screen; the fourth material is formed by a rotary tableting machine to obtain a circular sheet structure.

FIG. 4 is a view showing the surface morphology of the igniting agent composition in the first embodiment of the present invention; in this comparative example, graphite and boron nitride are simultaneously added as a releasing agent, and the two perform a good synergistic action and rotate. After the press is pressed into a tablet, the surface of the tablet is not stuck, and the tablet can maintain the original luster and shape well, and the surface has no pits and no burrs.

The circular sheet-like structure tablets were granulated and sieved to obtain a granular structure having a particle size of 12 to 20, and the test was carried out. Figure 5 is a graph showing the time and pressure of the ignition agent composition in Example 1 of the present invention; Table 2 is a time and pressure data table of the ignition agent composition in Example 1 of the present invention, including the ignition time TTFG data statistics. From Fig. 5 and Table 2, it can be seen that the ignition agent composition is normally ignited under normal temperature + 23 ° C, high temperature + 85 ° C, low temperature - 40 ° C, and the pressure is normal, and the ignition time TTFG and the pressure performance of the gas generator satisfy the gas. The generator standard requires that the low temperature ignition time meet the requirement of less than 7ms.

Table 2

Example 2

These components were weighed and pressed into a pellet having a diameter of 6.4 mm and a thickness of 2.7 to 3.1 mm by wet granulation and a rotary tableting machine. The specific preparation method comprises the following steps: mixing cerium nitrate, 5-aminotetrazole (5-AT), potassium nitrate, mica powder, aluminum oxide, graphite and boron nitride through a ribbon mixer to obtain a first material; A material is added to 6% (mass percentage) of distilled water for wet kneading for 10 min to obtain a second material, and the second material is passed through a 10-mesh screen to obtain a third material; the third material is dried and dried to a water content. Less than 0.5% of the total mass of the third material, the fourth material is again obtained through the 10-mesh screen; the fourth material is formed by a rotary tableting machine to obtain a circular sheet structure.

FIG. 6 is a view showing the surface morphology of the igniting agent composition in Example 2 of the present invention; in this comparative example, graphite and boron nitride are simultaneously added as a releasing agent, and the two perform a good synergistic action and rotate. After the press is pressed into a tablet, the surface of the tablet is not stuck, and the tablet can maintain the original luster and shape well, and the surface has no pits and no burrs.

The circular sheet-like structure tablets were granulated and sieved to obtain a granular structure having a particle size of 12 to 20, and the test was carried out. Figure 7 is a graph showing the time and pressure of the ignition agent composition in Example 2 of the present invention; Table 3 is a time and pressure data table of the ignition agent composition in Example 2 of the present invention, including the ignition time TTFG data statistics. From Fig. 7 and Table 3, it can be seen that the ignition agent composition is normally ignited under normal temperature + 23 ° C, high temperature + 85 ° C, low temperature - 40 ° C, and the pressure is normal, and the ignition time TTFG and the pressure performance of the gas generator satisfy the gas. The generator standard requires that the low temperature ignition time meet the requirement of less than 7ms.

table 3

Example 3

These components were weighed and pressed into a pellet having a diameter of 6.4 mm and a thickness of 2.7 to 3.1 mm by wet granulation and a rotary tableting machine. The specific preparation method comprises the following steps: mixing cerium nitrate, 5-aminotetrazole (5-AT), potassium nitrate, mica powder, aluminum oxide, graphite and boron nitride through a ribbon mixer to obtain a first material; A material is added to 5% (mass percent content) of distilled water for wet kneading for 5 min to obtain a second material, and the second material is passed through a 20-mesh sieve to obtain a third material; the third material is dried and dried to a moisture content. Less than 0.5% of the total mass of the third material, the fourth material is again obtained through the 10-mesh screen; the fourth material is formed by a rotary tableting machine to obtain a circular sheet structure.

FIG. 8 is a view showing the surface morphology of the igniting agent composition in Example 3 of the present invention; in this comparative example, graphite and boron nitride are simultaneously added as a releasing agent, and the two perform a good synergistic action and rotate. After the press is pressed into a tablet, the surface of the tablet is not stuck, and the tablet can maintain the original luster and shape well, and the surface has no pits and no burrs.

The circular sheet-like structure tablet was granulated and sieved to obtain a granular structure having a particle diameter of 12 to 20, and the test was carried out. As shown in FIG. 9, a graph of time and pressure of the ignition agent composition in Example 3 of the present invention; Table 4 is a time and pressure data table of the ignition agent composition in Example 3 of the present invention, including ignition time TTFG data statistics. From Fig. 9 and Table 4, it is known that the ignition agent composition is at a normal temperature of +23 ° C, a high temperature of +85 ° C, and a low temperature. Under the condition of -40 °C, the ignition is normal, the pressure is normal, and the ignition time TTFG and the pressure performance of the gas generator meet the requirements of the gas generator standard, and the low-temperature ignition time satisfies the requirement of less than 7 ms.

Table 4

Example 4

These components were weighed and pressed into a pellet having a diameter of 6.4 mm and a thickness of 2.7 to 3.1 mm by wet granulation and a rotary tableting machine. The specific preparation method comprises the following steps: mixing cerium nitrate, 5-aminotetrazole (5-AT), potassium nitrate, mica powder, aluminum oxide, graphite and boron nitride through a ribbon mixer to obtain a first material; A material is added to 4% (mass% content) of distilled water for wet kneading for 5 min to obtain a second material, and the second material is passed through a 10-mesh screen to obtain a third material; the third material is dried and dried to a moisture content. Less than 0.5% of the total mass of the third material, the fourth material is again obtained through the 20-mesh screen; the fourth material is formed by a rotary tableting machine to obtain a circular sheet structure.

FIG. 10 is a view showing the surface morphology of the igniting agent composition in Example 4 of the present invention; in this comparative example, graphite and boron nitride are simultaneously added as a releasing agent, and the two perform a good synergistic action and rotate. After the press is pressed into a tablet, the surface of the tablet is not stuck, and the tablet can maintain the original luster and shape well, and the surface has no pits and no burrs.

The circular sheet-like structure tablet was granulated and sieved to obtain a granular structure having a particle size of 12 to 20, and the test was carried out. As shown in FIG. 11, a graph of time and pressure of the ignition agent composition in Example 4 of the present invention; Table 5 is a time and pressure data table of the ignition agent composition in Example 4 of the present invention, including ignition time TTFG data statistics. From Fig. 11 and Table 5, it can be seen that the ignition agent composition is at a normal temperature of +23 ° C, a high temperature of +85 ° C, and a low temperature. Under the condition of -40 °C, the ignition is normal, the pressure is normal, and the ignition time TTFG and the pressure performance of the gas generator meet the requirements of the gas generator standard, and the low-temperature ignition time satisfies the requirement of less than 7 ms.

table 5

Example 5

These components were weighed and pressed into a pellet having a diameter of 6.4 mm and a thickness of 2.7 to 3.1 mm by wet granulation and a rotary tableting machine. The specific preparation method comprises the following steps: mixing cerium nitrate, 5-aminotetrazole (5-AT), potassium nitrate, mica powder, aluminum oxide, graphite and boron nitride through a ribbon mixer to obtain a first material; A material is added to 12% (mass percentage content) of distilled water for wet kneading for 4 minutes to obtain a second material, and the second material is passed through a 20-mesh screen to obtain a third material; the third material is dried and dried to a water content. Less than 0.5% of the total mass of the third material, the fourth material is again obtained through the 30-mesh screen; the fourth material is formed by a rotary tableting machine to obtain a circular sheet structure.

FIG. 12 is a view showing the surface morphology of the igniting agent composition in Example 5 of the present invention; in this comparative example, graphite and boron nitride are simultaneously added as a releasing agent, and the two perform a good synergistic action and rotate. After the press is pressed into a tablet, the surface of the tablet is not stuck, and the tablet can maintain the original luster and shape well, and the surface has no pits and no burrs.

The circular sheet-like structure tablet was granulated and sieved to obtain a granular structure having a particle size of 12 to 20, and the test was carried out. As shown in FIG. 13, it is a graph showing the time and pressure of the ignition agent composition in Example 5 of the present invention; Table 6 is a time and pressure data table of the ignition agent composition in Example 5 of the present invention, including ignition time TTFG data statistics. From Fig. 13 and Table 6, it can be seen that the ignition agent composition is at normal temperature + 23 ° C, high temperature + 85 ° C, low temperature. Under the condition of -40 °C, the ignition is normal, the pressure is normal, and the ignition time TTFG and the pressure performance of the gas generator meet the requirements of the gas generator standard, and the low-temperature ignition time satisfies the requirement of less than 7 ms.

Table 6

The above is only the best embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope disclosed by the present invention. Alternatives are intended to be covered by the scope of the present invention.

The details not described in detail in the specification of the present invention are well known to those skilled in the art.

Claims

An ignition agent composition having reliable ignition performance, characterized by comprising: a mass percentage component as follows:
The igniting agent composition according to claim 1, characterized in that it comprises a component having a mass percentage content as follows:
The ignition-safety ignition composition according to claim 1 or 2, wherein the 5-aminotetrazole has a particle diameter D90 of not more than 30 μm.
The ignition-safety ignition composition according to claim 1 or 2, wherein the boron nitride has a particle diameter D90 of not more than 3.0 μm.
The ignition-safety ignition composition according to claim 1 or 2, wherein the potassium nitrate has a particle diameter D90 of not more than 165 μm.
The ignition performance reliable ignition agent composition according to claim 1 or 2, wherein the sum of the water contents of the components of the ignition agent composition is not more than 1% of the total mass of each component.
The ignition-safety ignition composition according to claim 1 or 2, wherein each component mixture is formed into particles having a water content of less than 0.5% before compression molding.
The igniting agent composition according to claim 1 or 2, wherein the igniting agent composition is a circular sheet-like structure, and the circular sheet-like structure has a diameter of 3 to 10 mm; The thickness of the sheet-like structure is 1 to 5 mm; the mass of each of the circular sheet structures is 0.01 to 3 g.
The igniting agent composition having reliable ignition performance according to claim 1 or 2, wherein the igniting agent composition has a granular structure and has a particle diameter of 12 to 20 mesh.
The method for producing an igniting agent composition having reliable ignition performance according to any one of claims 1 to 2, characterized in that the igniting agent composition is prepared by wet granulation.
The method for preparing an ignition-safety ignition composition according to claim 10, wherein the specific preparation method comprises the following steps:

(1) mixing cerium nitrate, 5-aminotetrazole, potassium nitrate, mica powder, aluminum oxide, graphite and boron nitride to obtain a first material;

(2), the first material is added with water for wet mixing to obtain a second material, wherein the amount of water added is 3% to 15% of the total mass of the first material;

(3), the second material is passed through a screen of 10 to 40 mesh to obtain a third material;

(4) drying the third material to a moisture content of less than 0.5% of the total mass of the third material, and again obtaining a fourth material through a screen of 10 to 40 mesh;

(5), the fourth material is formed into a material.
The method for preparing a igniting agent composition with reliable ignition performance according to claim 11, wherein in the step (1), cerium nitrate, 5-aminotetrazole, potassium nitrate, mica powder, and aluminum oxide are used. , graphite and boron nitride are mixed in a mixing device to obtain a first material, the mixing time is ≤ 20 min; the mixing device is a ribbon mixer.
The method for preparing a igniting agent composition with reliable ignition performance according to claim 11, wherein the wet mixing time in the step (2) is from 2 min to 15 min; and the wet mixing device is a kneader or a mixture. machine.
The method for preparing an igniting agent composition with reliable ignition performance according to claim 11, wherein in the step (5), the fourth material is molded by a rotary tableting machine.
The method for preparing an igniting agent composition with reliable ignition performance according to claim 11, wherein the material in the step (5) is molded to obtain a circular sheet structure, and the diameter of the circular sheet structure is 3 ～10 mm; the thickness of the circular sheet structure is 1 to 5 mm; the mass of each circular sheet structure is 0.01 to 3 g.
The method for preparing a igniting agent composition with reliable ignition performance according to claim 11, wherein the material in the step (5) is shaped to obtain a granular structure, and the particle size of the granular structure is 12 to 20 mesh; The granular structure is obtained by granulating the sheet structure and then sieving it.