Gas generating agent composition as well as preparation method and application thereof

A technology of gas generating agent and composition, which is applied in the generation of compressed gas, ammonium perchlorate composition, attacking equipment, etc. It can solve the problems of fragility, inability to maintain well, unfavorable residue agglomeration, etc., and achieve slagging Improve and reduce the effect of molten copper residue

Active Publication Date: 2020-09-18
HUBEI HANGPENG CHEM POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this patent uses titanate as a form-retaining agent, which does not have a significant effect on form-retaining, and cannot play a good role in maintaining the form of combustion, especially for basic copper nitrate content greater than 40%, and guanidine nitrate content greater than 40%. 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, combustion catalysts, combustion control agents and slagging agents, fuels using azoles and metal salts, and slagging agents are solidified Additives for the combustion residues of gas generants, thereby facilitating the removal of residues by the filter in the airbag, but this patent is a

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  • Gas generating agent composition as well as preparation method and application thereof
  • Gas generating agent composition as well as preparation method and application thereof
  • Gas generating agent composition as well as preparation method and application thereof

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preparation example Construction

[0077] The preparation method of the gas generant composition of the present invention can be prepared by wet granulation, spray granulation or dry granulation. Wherein spray granulation or dry granulation can adopt traditional granulation process method.

[0078] Wherein the specific preparation method of wet granulation comprises the following steps:

[0079] (1) Mix guanidine nitrate, basic copper nitrate, strontium nitrate, ammonium perchlorate and a slagging agent to obtain the first material; mix in a mixing equipment, and the mixing time is ≥ 5min; the mixing equipment can be a pneumatic mixer , V-type mixer, three-dimensional multi-directional motion mixer, automatic lifting hopper mixer, vibration mill, ribbon mixer or acoustic resonance mixer.

[0080] (2), add water to the first material and carry out wet mixing, obtain the second material, the time of wet mixing is 20min~60min; Wherein the amount of water added is 5%~15% of the first material gross mass; Preferabl...

Embodiment 1

[0107] The gas generant composition comprises the following components in mass percent:

[0108] Guanidine Nitrate 40%

[0109] Basic copper nitrate 42.75%

[0110] Strontium nitrate 8%

[0111] Ammonium Perchlorate 3%

[0112] Barium zirconate 5.5%

[0113] Talc 0.75%

[0114] After these components are weighed, they are compressed into discs with a diameter of 5 mm and a thickness of 1.9 mm by wet granulation and rotary tablet press. The specific preparation method is: guanidine nitrate, basic copper nitrate, strontium nitrate, ammonium perchlorate Mix the first material with barium zirconate through a mixing device; add 15% distilled water to the first material and carry out wet kneading for 60 minutes to obtain the second material, and pass the second material through a 40-mesh screen to obtain the third material; The third material is dried until the water content is less than 0.5% of the total mass of the third material, and the fourth material is obtained through a...

Embodiment 2

[0131] The gas generant composition comprises the following components in mass percent:

[0132] Guanidine Nitrate 50%

[0133] Basic copper nitrate 41.5%

[0134] Strontium nitrate 1.5%

[0135] Ammonium Perchlorate 2%

[0136] Strontium Zirconate 4%

[0137] Talc 1%

[0138] After these components are weighed, they are compressed into discs with a diameter of 5 mm and a thickness of 1.9 mm by wet granulation and rotary tablet press. The specific preparation method is: guanidine nitrate, basic copper nitrate, strontium nitrate, ammonium perchlorate Mix with strontium zirconate and talcum powder to obtain the first material; add 10% distilled water to the first material and carry out wet kneading for 50 minutes to obtain the second material, and pass the second material through a 35-mesh screen to obtain the third material ; The third material is dried until the water content is less than 0.5% of the total mass of the third material, and the fourth material is obtained by...

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Abstract

The invention relates to a gas generating agent composition, a preparation method and a gas generator containing the gas generating agent composition. The gas generating agent composition comprises the following components in percentage by mass: 40-60% of guanidine nitrate, 25%-60% of basic copper nitrate, 1%-20% of strontium nitrate, 1%-10% of ammonium perchlorate, 1%-10% of a slag-forming agent,and 0.6%-10% of a release agent/lubricant. The gas generating agent composition uses a slag-forming agent as a form-retaining agent. A tablet can well keep the form after combustion and is preventedfrom melting and splashing to burn an air bag after combustion, strontium nitrate and ammonium perchlorate are adopted as auxiliary oxidants, the use amount of basic cupric nitrate is reduced, moltencopper residues are reduced, and the gas generating agent composition is mainly used for an automobile safety airbag gas generator.

Description

technical field [0001] The invention relates to a gas generating agent composition, a preparation method and an application thereof, and belongs to the technical field of automobile airbag gas generators. Background technique [0002] Automobile airbag gas generating agent is loaded into the gas generator as a gas-generating agent, and is triggered when needed to generate 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, and starts to burn the gas generating agent inside to generate gas, inflate the air bag, and form a cushioning air cushion between the interior and the human body to protect the human body from injury. [0003] The gas generating agent in the early stage is mainly the gas generating agent formula of sodium azide type. This formula has many advantages such as stable combustion, low combustion temperature, easy ignition, low in...

Claims

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Application Information

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IPC IPC(8): C06D5/06B60R21/264
CPCC06D5/06B60R21/2644C06B29/22C06B31/00
Inventor 罗运强任响宁杜涛张俊沈晓琛
Owner HUBEI HANGPENG CHEM POWER TECH
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