Gas generating agent composition, method for preparing same, application of gas generation agent composition and gas generator

The technology of a gas generating agent and composition, which is applied in the field of gas generators and automobile airbag gas generators, can solve the problems of ineffective ignition improvement, inability to maintain well, unfavorable residue agglomeration, etc., so as to avoid melting splash burns. Air pockets, the effect of reducing molten copper residues

Inactive Publication Date: 2018-02-16
HUBEI HANGPENG CHEM POWER TECH
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  • Application Information

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Problems solved by technology

However, this patent only uses titanate as the only shape-retaining agent, which has no obvious effect on shape retention and cannot play a good role in combustion state retention, especially for the content of basic copper nitrate greater than 40%, and the content of guanidine nitrate greater than 40%. 40% of the gas generating agent can not play a good role in maintaining the combustion form, and the gas generating agent formula is not easy to be ignited
[0007] For example, patent CN100376515C discloses a gas-generating composition, including guanidine nitrate, basic copper nitrate, auxiliary oxidant sodium nitrate, copper oxide and iron oxide, and ignition improver (aluminum sesquioxide, copper chloride, copper chromate, Potassium chromate), the gas-generating composition that adopts ignition modifier to make it easier to ignite, and the ignition delay period is short, but aluminum oxide is generally used for residue agglomeration, and has little effect on ignition improvement; copper chloride is a weak oxidant for ignition The improvement effect is not great; copper chromate and potassium chromate are strong oxidants containing copper, which can improve ignition to a certain extent, but both will increase the residue content. Copper chromate increases the insoluble residue content, and potassium chromate increases The content of dissolved residues, and the substances containing alkali metal potassium will form soluble aerosol particles after burning, which is not conducive to the agglomeration of residues
[0008] Another example is that the patent US5827996A discloses a gas generating agent for an airbag, including fuels using azoles or metal salts thereof, oxidizers, combus

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  • Gas generating agent composition, method for preparing same, application of gas generation agent composition and gas generator
  • Gas generating agent composition, method for preparing same, application of gas generation agent composition and gas generator
  • Gas generating agent composition, method for preparing same, application of gas generation agent composition and gas generator

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preparation example Construction

[0063] The preparation method of the gas generating agent composition easy to slagging and ignition of the present invention specifically includes the following steps:

[0064] (1) The first material is obtained after mixing guanidine nitrate, basic copper nitrate, strontium nitrate, ammonium perchlorate and strontium titanate. Mixing in mixing equipment, mixing time ≥5min; mixing equipment can be V-type mixer, three-dimensional multi-directional motion mixer, automatic lifting hopper mixer, vibration mill, ribbon mixer or acoustic resonance mixer.

[0065] (2) Add water to the first material and perform wet mixing for 20min-60min to obtain the second material, wherein the amount of water added is 8%-15% of the total mass of the first material, preferably distilled water is added. The equipment for wet mixing is a kneader or a mixer, for example, a horizontal kneader, a vertical kneader, a ribbon mixer or an acoustic resonance mixer can be selected.

[0066] (3) Pass the second mate...

Embodiment 1

[0095] The gas generating agent composition contains the following components in mass percentage content:

[0096] Guanidine nitrate 50%

[0097] Basic copper nitrate 31.75%

[0098] Strontium nitrate 10%

[0099] Ammonium perchlorate 2%

[0100] Strontium titanate 5.5%

[0101] Talc powder 0.75%.

[0102] After these components are weighed, they are pressed into a disc with a diameter of 5mm and a thickness of 1.9mm by wet granulation and a rotary tablet press. The specific preparation method is: guanidine nitrate, basic copper nitrate, strontium nitrate, ammonium perchlorate After mixing with strontium titanate through a mixing device, the first material is obtained; the first material is added to 8% distilled water for wet kneading for 20 minutes to obtain the second material, and the second material is passed through a 10-mesh screen to obtain the third material; The three materials are dried until the water content is less than 0.5% of the total mass of the third material, and the ...

Embodiment 2

[0109] The gas generating agent composition contains the following components in mass percentage content:

[0110] Guanidine nitrate 40%

[0111] Basic copper nitrate 40%

[0112] Strontium nitrate 12.75%

[0113] Ammonium perchlorate 1%

[0114] Strontium titanate 5.5%

[0115] Talc 0.75%

[0116] After these components are weighed, they are pressed into a disc with a diameter of 5mm and a thickness of 1.9mm by wet granulation and a rotary tablet press. The specific preparation method is: guanidine nitrate, basic copper nitrate, strontium nitrate, ammonium perchlorate After mixing with strontium titanate through mixing equipment, the first material is obtained; the first material is added to 15% distilled water for wet kneading for 60 minutes to obtain the second material, and the second material is passed through a 40 mesh screen to obtain the third material; The three materials are dried until the moisture content is less than 0.5% of the total mass of the third material, and the fou...

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Abstract

The invention relates to a gas generating agent composition, a method for preparing the same and a gas generator with the gas generation agent composition. The gas generating agent composition comprises, by weight, 40%-60% of guanidine nitrate, 25%-40% of alkali copper nitrate, 1%-20% of strontium nitrate, 1%-10% of ammonium perchlorate, 5.5%-10% of strontium titanate and 0.6%-10% of talc powder.The gas generating agent composition, the method and the gas generator have the advantages that the strontium titanate and the talc powder are jointly used as shape keeping agents, synergistic effectscan be realized by the strontium titanate and the talc powder, accordingly, pre-combustion shapes of tablets can be effectively kept after the tablets are combusted, and gas bags can be prevented from being burnt due to melting and splashing of the combusted tablets; the strontium nitrate is used as an auxiliary oxidizing agent, the usage amount of the alkali copper nitrate is reduced, and accordingly molten copper residues can be reduced; the ammonium perchlorate is used as an ignition performance regulator, accordingly, the low-temperature ignition performance of the gas generating agent composition can be obviously improved, the combustion speeds can be increased, and the gas generating agent composition mainly can be used for gas generators for supplementary restraint systems of automobiles.

Description

Technical field [0001] The invention relates to a gas generating agent composition, a preparation method, application and a gas generator containing the composition, in particular to a gas generating agent composition that is easy to slag and ignite, a preparation method, an application and a gas generator containing the composition The gas generator belongs to the technical field of gas generators for automobile safety airbags. Background technique [0002] The car airbag gas generating agent is used as a gas-producing agent to be put into the gas generator, which is triggered when needed to produce a large amount of gas. The airbag consists of a gas generator and an air bag. Generally, when the collision exceeds the preset intensity, the gas generator is activated and triggered to start burning the internal gas generating agent to generate gas, inflate the air bag, and form a cushion air cushion between the interior and the human body to protect the human body from injury. [0...

Claims

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Application Information

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IPC IPC(8): C06B31/12C06B23/00C06B21/00C06D5/06B60R21/264
CPCB60R21/2644C06B21/0008C06B21/0033C06B23/009C06B31/12C06D5/06
Inventor 罗运强杜涛王秋雨任响宁张俊杨志雄周雄夏强阮家声
Owner HUBEI HANGPENG CHEM POWER TECH
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