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Automatic ignition powder for gas generator of air bag restraint system of automobile and preparation method of automatic ignition powder

A gas generator, automobile safety technology, applied in explosives, offensive equipment, non-explosive/non-thermal agent components, etc., can solve the problems of high ignition temperature and high risk coefficient, reduce decomposition temperature, avoid explosion danger, heat The effect of suitable decomposition temperature

Active Publication Date: 2016-07-20
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention solves the technical problems of high ignition temperature and high risk factor of raw materials and production process in the automatic ignition powder in the prior art, and provides an automatic ignition powder with suitable ignition temperature, safety and environmental protection and its preparation method

Method used

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Effect test

preparation example Construction

[0027] The present invention also provides the preparation method of the automatic ignition powder, which comprises mixing fuel, oxidant and combustion accelerator to obtain a mixture, and then granulating the mixture, drying and pressing to obtain the automatic ignition powder.

[0028] As mentioned above, the autoignition powder may also contain various binders commonly used in the prior art, therefore, the preparation method also includes the step of adding binders to the mixture. Preferably, in order to facilitate the uniform mixing of the binder and other components in the medicament, the binder is preferably added in the form of a solution, for example, the binder may be dissolved in a solvent first, and then added to the mixture.

[0029] It should be pointed out that the self-igniting powder provided by the present invention is also suitable for use in dual-stage gas generators, and is used for the scrapping of secondary gas generators when only the primary gas generator ...

Embodiment 1

[0032] Weigh 30 parts by weight of the main fuel guanidine nitrate (average particle size of 1-10 μm), 38 parts by weight of the main oxidant basic copper nitrate (average particle size of 1-6 μm), and auxiliary fuel 5-aminotetrazole (average particle size of 1~10 μm) 16 parts by weight, auxiliary oxidant ammonium perchlorate (average particle size is 10-20 μm) 10 parts by weight; combustion accelerator rare earth perovskite type composite metal oxide La 0.9 Ce 0.1 MnO 3 (the average particle size is 30nm) 4 parts by weight, dry mix each component uniformly first, then add a certain amount of solvent ethanol containing 2 parts by weight of binder carboxymethyl cellulose potassium to wet-mix granulation, dry at 50°C, and finally Compress to obtain the sheet-like autoignition powder of this embodiment, denoted as S1.

Embodiment 2

[0034] Weigh 29 parts by weight of the main fuel guanidine nitrate (average particle size of 1-10 μm), 41 parts by weight of the main oxidant basic copper nitrate (average particle size of 1-6 μm), and auxiliary fuel 5-aminotetrazole (average particle size of 1-10 μm) 15 parts by weight, auxiliary oxidant ammonium perchlorate (average particle size is 10-20 μm) 10 parts by weight; combustion accelerator rare earth perovskite type composite metal oxide La 0.9 Cu 0.1 MnO 3 (average particle size is 50nm) 3 parts by weight, dry mix each component uniformly first, then add a certain amount of solvent ethanol containing 2 parts by weight of adhesive fluororubber to wet mix and granulate, dry at 50°C, and finally press to obtain this product The sheet-like autoignition powder of the embodiment is denoted as S2.

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Abstract

The invention provides automatic ignition powder for a gas generator of an air bag restraint system of an automobile and a preparation method of the automatic ignition powder.The automatic ignition powder contains fuel, oxidant and flame accelerator; the flame accelerator is rare earth and perovskite type composite metal oxide; the general formula of the flame accelerator is La1-xAxMnO3, wherein A is Ce and / or Cu, and x is greater than zero and less than one.According to the automatic ignition powder, the specific flame accelerator is adopted and can effectively promote a redox reaction in the powder, thereby thermal decomposition of the automatic ignition powder is promoted, the decomposition temperature of the powder is lowered, and automatic ignition performance of the powder is improved.

Description

technical field [0001] The invention belongs to the technical field of automobile safety airbags, and in particular relates to an automatic ignition powder for automobile safety airbag gas generators and a preparation method thereof. Background technique [0002] In general, the working principle of the automobile airbag is: by triggering the pyrotechnic gas-producing filler, the gas generator generates a certain amount of gas in a very short period of time, thereby inflating the airbag. However, in the case of a sharp temperature rise caused by the flame, the pyrotechnic charge of the gas generator will not burn normally, but will undergo a violent reaction or even explode, exposing the driver and passengers to greater danger. In order to avoid this situation and ensure its safety, a new material with automatic ignition function has been added, which can be activated according to the The rise in ambient temperature automatically ignites. [0003] At present, a nitroguanid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B23/00C06B31/00
Inventor 简丽娟郑东升毛楠
Owner BYD CO LTD
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