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A propellant for a gas generator and a preparation method thereof, and a gas generator for an automobile airbag

A technology of gas generators and propellant powder, which is applied in vehicle safety arrangements, explosive processing equipment, pedestrian/passenger safety arrangements, etc., and can solve the problem of reducing the combustion calorific value and combustion temperature of propellant powder, and unfavorable propellant powder to the ignition of gas-producing powder , Low combustion temperature and other issues, to achieve the effect of improving gas production performance, enhancing ignition effect, and increasing gas production rate

Active Publication Date: 2020-02-21
BYD CO LTD
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  • Description
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  • Application Information

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Problems solved by technology

However, the oxygen balance value of the second reducing agent used to increase the gas production pressure is too low, the oxygen consumption is large, and there is an endothermic process in the early stage of thermal decomposition, the combustion speed is slow, and the combustion temperature is low, although the gas production of the propellant is increased. pressure, but reduces the combustion calorific value and combustion temperature of the propellant powder, which is not conducive to the ignition of the propellant to the gas-generating powder

Method used

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preparation example Construction

[0018] The present invention also provides a method for preparing the propellant, which method comprises uniformly mixing the fuel, the oxidant and the additive to obtain a mixture, then adding a binder dissolved in a solvent to the mixture for wet mixing, granulating, and drying, The fire transfer agent is obtained; the additive is an azole energy-containing ion compound. Preferably, the azole energetic ion compound is 5-aminotetrazolium nitrate.

[0019] Finally, the present invention also provides a gas generator for automobile airbags, wherein the gas generator contains a transfer agent; wherein, the transfer agent is the transfer agent provided by the present invention.

Embodiment 1

[0022] Weigh 12 parts by weight of amorphous boron powder (average particle size 1-10 μm), 65 parts by weight of oxidant potassium nitrate (average particle size 50-150 μm), 20 parts by weight of 5-aminotetrazole nitrate; dry each component first Mix evenly, then wet mix with a certain amount of solvent containing 3 parts by weight of nitrocellulose as a binder, pass through a 20-mesh sieve to granulate, remove fine powder with a 40-mesh sieve, and dry at 50°C to obtain the transfer powder, which is designated as S1.

Embodiment 2

[0024] Weigh 12 parts by weight of amorphous boron powder (average particle size 1-10 μm), 70 parts by weight of oxidant potassium nitrate (average particle size 50-150 μm), and 15 parts by weight of additive 5-aminotetrazole nitrate. Dry mix evenly, then add a certain amount of solvent containing 3 parts by weight of polyvinyl butyral as a binder, wet mix, pass through a 20-mesh sieve to granulate, remove fine powder with a 40-mesh sieve, and dry at 50°C to obtain the transfer powder , denoted as S2.

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Abstract

The invention provides a gas generator ignition agent and a preparation method thereof, and a gas generator for a vehicle safety airbag. The gas generator ignition agent contains a fuel, an oxidant, abinder and an additive, wherein the additive is an oxazole-based energy-containing ionic compound. According to the present invention, by adding 5-aminotetrazole nitrate to a boron / potassium nitrateignition agent, on the basis of the ensuring of the combustion heat and the combustion temperature of the agent, the high-temperature and high-pressure gas amount can be increased, the output pressureof the ignition agent can be increased, and the output performance of the ignition pipe can be increased, such that the pressure starting time of the gas generator is advanced to less than 2 ms, andthe pressure value at 10 ms is increased by about 20 Kpa so as to improve the gas generating performance of the gas generator.

Description

technical field [0001] The invention belongs to the technical field of automobile safety airbags, and in particular relates to a propellant for a gas generator and a preparation method thereof, and a gas generator for an automobile safety airbag. Background technique [0002] The gas generator for airbags mainly uses an electric igniter to convert the electrical signal from the electronic control unit into detonation energy, and then the propellant in the gas generator quickly and stably transmits the detonation energy to the gas-generating powder. [0003] The propellant powder mainly relies on high-temperature hot particles or high-temperature and high-pressure material flow to force heat transfer to the gas-generating powder, thereby igniting the gas-generating powder. The commonly used point-transfer propellant is boron / potassium nitrate agent, which mainly produces a large number of high-temperature hot particles for ignition, with large combustion calorific value and h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B33/14C06C5/00C06B21/00B60R21/26
CPCB60R21/26C06B21/0066C06B33/14C06C5/00
Inventor 简丽娟
Owner BYD CO LTD
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