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Gas generating agent for gas generator and manufacturing method thereof

A technology of gas generating agent and gas generator, applied in the field of gas generating agent, can solve the problems of many process control links, many material components, unfavorable cost, etc., and achieve the effects of wide source, fast gas production speed, and improved efficiency

Inactive Publication Date: 2015-03-18
HUBEI INST OF AEROSPACE CHEMOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The deficiencies in the prior art are: the method of modifying ammonium nitrate is used, or the modified ammonium nitrate is combined in formula, there are many material components, and there are many process control links in production, which is not conducive to cost reduction

Method used

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  • Gas generating agent for gas generator and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] 23% bistetrazole potassium salt; 71% modified ammonium nitrate, wherein the content of potassium nitrate in the modified ammonium nitrate is 12%; 6% pottery clay; add the powder into the mixer in turn, use ceramic balls as the mixing medium, and mix , the mixing time is 120min, and a uniform powder is obtained after mixing; the dry granulation process is used for granulation, and after granulation, a 100-ton hydraulic press is used for pressing the medicine, and after pressing, place it in an oven at 75°C±2°C for 35 hours to dry; Then the tablets were taken for DSC analysis at -40°C to 160°C, and the endothermic peak appeared at 116°C. Then put the tablet into the gas generator, heat it at -35°C, +23°C, and +85°C for 4 hours and then ignite it. The outgassing time is less than 100 milliseconds, there is no obvious residue, and the generator is complete.

Embodiment 2

[0057]25% potassium salt of bistetrazole; 65% modified ammonium nitrate, wherein the content of potassium nitrate is 10%; 5% talcum powder; 5% potassium chlorate; add the powder into the mixer in turn, use ceramic balls as the mixing medium, and mix. The mixing time is 120 minutes, and a uniform drug powder is obtained after mixing; the granulation is carried out by using the water-soluble spray drying granulation process, and the heating temperature is 150°C. Leave to dry for 35 hours; then take the tablet for DSC analysis at -40°C to 160°C, and the endothermic peak appears at 114°C. Then put the tablet into the gas generator, heat it at -35°C, +23°C, and +85°C for 4 hours and then ignite it. The outgassing time is less than 100 milliseconds, there is no obvious residue, and the generator is complete.

Embodiment 3

[0059] 17% potassium salt of bistetrazole; 68% modified ammonium nitrate, wherein the content of potassium nitrate is 10%; 5% white carbon black; 10% potassium perchlorate; the powder is added to the mixer in turn, and the ceramic ball is used as the mixing medium to carry out Mixing, the mixing time is 120 minutes, after mixing, a uniform powder is obtained; the water-soluble spray drying granulation process is used for granulation, and the heating temperature is 160°C. Place in an oven for 35 hours to dry; then take the tablet for DSC analysis at -40°C to 160°C, and the endothermic peak appears at 115°C. Then put the tablet into the gas generator, heat it at -35°C, +23°C, and +85°C for 4 hours and then ignite it. The outgassing time is less than 100 milliseconds, there is no obvious residue, and the generator is complete.

[0060] In a word, the present invention completely burns the nitrogen gas generating agent, and at the same time produces a large amount of gas; it has a...

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Abstract

The invention discloses a gas generating agent for a gas generator and a manufacturing method thereof, wherein the gas generating agent comprises the following components by the mass percentage: 15%-30% of a bis(tetrazole) potassium salt; 50%-80% of modified ammonium nitrate; 0%-15% of a performance regulator; and 0%-15% of a bonding and slag forming agent. The gas generating agent is prepared by weighing the components according to the proportion and through dry granulation and water-soluble granulation process; the bis(tetrazole) potassium salt is adopted to cooperate with modified ammonium nitrate, the dry or spray granulation process is used, the medicament granulating requirements can be met, and the granulating efficiency is improved. The gas generating agent can be ignited to burn under heat released from igniting gunpowder, ignition is quick, combustion can be smoothly carried out, gas is produced, the use requirements of inflatable airbags are met, the gas generation amount is large, the gas generation speed is fast, ignition is easy, low-temperature ignition performance is excellent, and thermal stability and chemical stability are good. The gas generating agent cannot be liquified to flow during self combustion.

Description

technical field [0001] This invention relates to a gas generant for generating gas. Background technique [0002] Gas generating agent is a kind of solid chemical gas generating agent, mainly composed of chemical substances such as oxidizing agent, reducing agent, combustion enhancer and adhesive. There are many patents on gas generating agents, which are mainly used in gas generators for automobile airbags, mainly including guanidine nitrate, nitroguanidine and ammonium nitrate. As for ammonium nitrate gas generating agents, most domestic and foreign patents modify ammonium nitrate, and then use the modified ammonium nitrate to mix with other materials for formula use, for example: [0003] US5545272, US5641938, and US6468369 use modified ammonium nitrate mixed with 5-aminotetrazole, guanidine nitrate, HTPB and polyethylenediamine dinitrate respectively; [0004] US6019861 is a formula patent, which mentions a formula composed of ammonium nitrate, potassium nitrate, stron...

Claims

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Application Information

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IPC IPC(8): C06D5/06
Inventor 姚俊张文龙刘亮张印明牛振宇
Owner HUBEI INST OF AEROSPACE CHEMOTECH
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