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Gas producing chemical for automobile air bag gas generator and preparation method of gas producing chemical

A gas generator and automobile safety technology, which is applied in the production of compressed gas, attacking equipment, etc., can solve the problems of injuring the occupants in the vehicle, precipitation or powdering of medicines, splashing metal fragments, etc. The effect of strong steps and simple raw material handling

Inactive Publication Date: 2018-11-23
陕西庆华汽车安全系统有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] On June 26, 2017, Takata, a famous Japanese auto parts supplier, declared bankruptcy. The company has been providing airbag products for large car companies such as General Motors, Volkswagen, Toyota and Honda for many years; In the defective airbag booster pump, ammonium nitrate-based gas-generating medicine is used. If this medicine is exposed to hot or humid environment for a long time, it will cause ammonium nitrate to precipitate or the medicine to be powdered, which may cause the medicine to ignite The combustion in the rear combustion chamber is uncontrolled, and the internal pressure is too high. When the airbag is deployed, metal fragments will be splashed, injuring the occupants in the car
[0004] At present, the research on gas-generating drugs for airbags is mainly concentrated on ammonium, azole, guanidine and azo. In order to reduce production costs, ammonium is mainly used in the market with relatively cheap raw material prices and a wide range of sources, namely Ammonium nitrate, ammonium perchlorate-type gas-generating drugs, the defects of ammonium nitrate-type gas-generating drugs have been exposed, ammonium perchlorate-type gas-generating drugs also have deliquescence, and will produce corrosive high-temperature hydrogen chloride gas after burning, which is harmful Passenger safety; guanidine gas-generating drugs have the characteristics of wide sources, low price, and non-hygroscopicity, but are rarely promoted due to low linear burning velocity. Therefore, it is required to develop a raw material with wide sources, low price, processable production, Certain sensitivity and performance, small size, stable performance, and airbags that produce as few toxic and harmful gas components as possible after combustion use gas-generating medicines to replace ammonium nitrate-type gas-generating medicines to promote the development of passive safety systems

Method used

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  • Gas producing chemical for automobile air bag gas generator and preparation method of gas producing chemical
  • Gas producing chemical for automobile air bag gas generator and preparation method of gas producing chemical
  • Gas producing chemical for automobile air bag gas generator and preparation method of gas producing chemical

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preparation example Construction

[0040] A preparation method of a gas-generating drug used in an automobile airbag gas generator according to the invention comprises the following components in terms of the mass percentage of the gas-generating drug: 45% to 63.2% of a combustible agent, 0.1% to 5% of a viscous mixture, 35%-50% oxidizing agent; the preparation method includes the following steps: weighing each component according to the above ratio, dispersing the combustible agent, adhesive, and oxidizing agent in the solution, adding them to a high-efficiency wet mixer, mixing uniformly and cutting Make small granules, then use a swing granulator to granulate, then lay the granules on a medicine tray and dry them, and finally add auxiliary additives to the dried granules, and then compress them into tablets with a rotary tablet press. Adding auxiliary additives The mass is 0.1%-0.5% of the sum of the mass of combustible agent, binder and oxidant.

[0041] Preferably, the solution is a mixture of absolute alc...

Embodiment 1

[0050] The gas generating drug of this example includes potassium perchlorate 17% with an average particle size of 16.3um, ultrafine guanidine nitrate with an average particle size of 5.3μm 52%, potassium nitrate with an average particle size of 16.7um 19%, and an average particle size of 5 -Aminotetrazole 10%, nitrocellulose 2% are formulated into a solution, and boron nitride 0.2% is added.

[0051] The preparation process of the gas-producing drug is as follows: figure 1 shown as:

[0052] Weigh 17% of potassium perchlorate with an average particle size of 16.3um, 52% of ultrafine guanidine nitrate with an average particle size of 5.3μm, 19% of potassium nitrate with an average particle size of 16.7um, and 10% of 5-aminotetrazole with an average particle size of less than 10μm , nitrocellulose 2% and boron nitride 0.2%, potassium perchlorate and potassium nitrate need to add a certain amount of white carbon black for ball milling and sieving before use, pretreat the irregu...

Embodiment 2

[0064] The gas generating drug of this example includes potassium perchlorate 17% with an average particle size of 16.3um, ultrafine guanidine nitrate with an average particle size of 5.3μm 52%, potassium nitrate with an average particle size of 16.7um 19%, and an average particle size of 5 -Aminotetrazole 10%, nitrocellulose 2% is formulated into a solution, and white carbon black 0.15% is added.

[0065] The preparation process of the gas-producing drug is as follows: figure 2 shown as:

[0066] Weigh 17% of potassium perchlorate with an average particle size of 16.3um, 52% of ultrafine guanidine nitrate with an average particle size of 5.3μm, 19% of potassium nitrate with an average particle size of 16.7um, and 10% of 5-aminotetrazole with an average particle size of less than 10μm , nitrocellulose 2% and silica 0.15%. Potassium perchlorate and potassium nitrate need to add a certain amount of white carbon black for ball milling and sieving treatment before use, and pret...

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Abstract

The invention discloses a gas producing chemical for an automobile air bag gas generator. The gas producing chemical is prepared from the following components by mass percent: 50% to 63.2% of combustible agent, 0.1% to 5% of adhesive and 35% to 50% of oxidant; the oxidant is one of potassium perchlorate and potassium nitrate or a mixture of the two in any proportion; the problem that an ammonium nitrate gas generation chemical is easy to air-slake is solved. The invention also discloses a preparation method of the gas producing chemical for the automobile airbag gas generator; the preparationmethod comprises the following steps: weighing the combustible agent, the adhesive and the oxidant according to the above proportion, dispersing in a solution, adding into an efficient wet mixing machine for mixing evenly, cutting into small particles, then performing size stabilization by adopting a swing type granulator, spreading granules flatly on a chemical plate, and finally adding an auxiliary additive into the dried granules and pressing by a rotary tablet press to form tablets, wherein the mass of the added auxiliary additive is 0.1% to 0.5% of the mass sum of the combustible agent, the adhesive and the oxidant.

Description

technical field [0001] The invention belongs to the technical field of automobile safety devices, and relates to a gas-generating medicine used in an automobile safety airbag gas generator, and also relates to a preparation method of the gas-generating medicine. Background technique [0002] Automotive passive safety system consists of sensors, controllers, gas generators, airbags, seat belts and seat belt pre-tensioning devices. When an unsafe accident occurs, the collision sensor sends speed change information to the central controller, and the central controller analyzes and judges the received information. When the threshold exceeds the set threshold, the system considers a collision and immediately sends an ignition signal to trigger the gas generator to ignite In the system, the gas generating agent is ignited to generate a large amount of gas, so that the airbag is inflated rapidly, breaks through the steering wheel cover and expands rapidly to form a cushion to prote...

Claims

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Application Information

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IPC IPC(8): C06D5/06
CPCC06D5/06
Inventor 孟航张繁姚琪孙卫升徐磊王晓锋张致魁郝艳萍柳斌刘希
Owner 陕西庆华汽车安全系统有限公司
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