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A kind of gas generant composition and its preparation method, safety airbag

A technology of gas generating agent and composition, which is applied in the production of compressed gas, attacking equipment and other directions, can solve the problems of low gas production and many solid residues, etc., and achieves the effects of large gas production, less solid residue, and improved burning rate.

Active Publication Date: 2018-05-08
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the technical problems of low gas production and many solid residues in existing gas generating agents, the present invention provides a gas generating agent composition with high gas production and less residue and its preparation method

Method used

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Examples

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preparation example Construction

[0028] According to the preparation method of the present invention, preferably, it also includes adding a slagging agent into the mixture.

[0029] According to the preparation method of the present invention, preferably, the oxidizing agent is at least one of ammonium nitrate, basic copper nitrate, basic cobalt nitrate and basic zinc nitrate.

[0030] According to the preparation method of the present invention, preferably, it further includes adding a phase stabilizer to the mixture.

[0031] According to the preparation method of the present invention, preferably, an anti-hygroscopic additive is added to the dried mixed particles before the pressing.

[0032] According to the preparation method of the present invention, preferably, the content of the slagging agent is 1-3wt%, the content of the phase stabilizer is 2-10%, and the content of the anti-moisture additive is 1-5% %.

[0033] According to the preparation method of the present invention, preferably, the average ...

Embodiment 1

[0038] Weigh 41% of the fuel azotetrazolium diguanidine salt, 44% of the oxidant ammonium nitrate (average particle size of 25 μm), 5% of the phase stabilizer potassium perchlorate (average particle size of 50nm) 4%, slagging agent silicon dioxide 2%, binder carboxymethyl cellulose sodium 1%, etc., dry mix each component evenly, then add a certain amount of solvent ethanol to wet mix and granulate, and dry at 55°C After the gas generating agent particles, weigh an appropriate amount of 3% 13X molecular sieve, mix with the particles to evenly coat the surface of the particles, and then press the coated particles into tablets with a diameter of 3mm and a thickness of 2mm. Put 10g of gas generating agent tablets into the gas generator, ignite and expand in a 28.3L pressure vessel tank, the ignition time TTFG is 1ms, the time to reach the maximum pressure Tpmax is 12ms, and the maximum pressure Pmax is 120Kpa. Use 1000ml of water to collect the spilled residue in the tank, and wei...

Embodiment 2

[0040]Weigh 36% of the fuel azotetrazolium diguanidine salt, 47% of the oxidant ammonium nitrate (average particle size of 25 μm), 7% of the phase stabilizer potassium nitrate (average particle size of 50 μm), catalyst cerium oxide (average particle size of 100nm) 3%, slagging agent silicon dioxide 3%, binder carboxymethyl cellulose sodium 2%, etc., dry mix each component evenly, then add a certain amount of solvent ethanol to wet mix and granulate, and dry at 55°C After the gas generating agent particles, weigh an appropriate amount of 13X molecular sieve 2%, mix with the particles, make it evenly coated on the surface of the particles, and then press the coated particles into tablets with a diameter of 3mm and a thickness of 2mm. Put 10g of gas generating agent tablets into the gas generator, ignite and expand in a 28.3L pressure vessel tank, the ignition time TTFG is 1ms, the time to reach the maximum pressure Tpmax is 16ms, and the maximum pressure Pmax is 112Kpa. Use 1000...

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Abstract

The invention provides a gas generating agent composition, a preparation method thereof, and a safety airbag. The composition includes fuel, an oxidant, a catalyst and a binding agent; the catalyst is cerium oxide. The gas generating agent of the invention has fast burning speed, large gas production and less solid residue. It has good ignition performance and does not need additional fire transmission equipment. The raw materials are easy to obtain, environmentally friendly and non-toxic.

Description

technical field [0001] The invention belongs to the field of gas generators, and in particular relates to a gas generator composition for a gas generator of an automobile safety airbag, a preparation method thereof, and a safety airbag. Background technique [0002] As the gas generating agent composition for the airbag of the car driver and passenger protection device, the gas generating agent composition used more in the market is mainly guanidine nitrate type and 5-aminotetrazole type, and basic copper nitrate is generally used as the gas generating agent composition. oxidizing agent. In order to increase the burning rate of the gas generating agent, it uses a large amount of pro-oxidant perchlorate and transition metal oxide as a burning rate catalyst. The large amount of perchlorate and metal oxide reduces the gas production of the gas generating agent. After the reaction, the solid The amount of residue is also large. At the same time, a fire transmission structure i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06D5/06
Inventor 简丽娟李金贵
Owner BYD CO LTD
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