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

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...

AI Technical Summary

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, 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 applicable to the formulation of azoles as fuel, which has a higher combustion temperature than the guanidine nitrate basic copper nitrate type formulation Too much, the shape of the tablet cannot be well maintained even if the slag forming agent is added

[0009] In addition, patent CN101952227B discloses a method for preparing a gas generating agent, adding guanidine nitrate, basic copper nitrate, auxiliary oxidants (such as potassium nitrate, strontium nitrate and sodium nitrate), burning rate regulator (potassium perchlorate), slag promoter agent (silicon dioxide, zinc oxide, ammonium oxide, aluminum oxide), tablet release aid and form retention synergistic aid B (graphite, molybdenum disulfide, tungsten disulfide, boron nitride), the granulation used in this patent The method is spray granulation, which consumes more energy than wet granulation; in addition, the slag accelerator used in this patent mainly comes from metal oxides, such as silicon dioxide, aluminum oxide, zinc oxide, and cerium oxide , metal oxides as slag accelerators can play a certain role in promoting slag agglomeration, but the effect on tablet shape maintenance is not obvious; at the same time, the patent uses tablet release aids such as: graphite, molybdenum disulfide, Tungsten disulfide, boron nitride, these additives only play the role of tableting aids, and cannot cooperate with metal oxides to promote slag agglomeration

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