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High-burning rate gas generating agent and granulation method thereof

A gas generating agent and process technology, which is used in the production of compressed gas, attack equipment, explosives, etc., can solve the problems of large fluctuations in the combustion performance of the agent, slow combustion speed of the gas generating agent, and high manufacturing costs, and achieve simple and easy processes. Operation, avoid the effect of crushing processing

Active Publication Date: 2018-03-27
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problem that the gas generating agent burns too slowly and has poor uniformity, which cannot meet the needs of some fast-acting automotive buffer protection devices, and is especially suitable for side airbag buffer protection systems
At the same time, it solves the problems of large fluctuations in the combustion performance of chemicals and high manufacturing costs, and then provides a high burning rate gas generant with higher burning speed and better uniformity

Method used

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  • High-burning rate gas generating agent and granulation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 60 kilograms of guanidine nitrate; 80 kilograms of basic copper nitrate with a solid content of 10% W; 10 kilograms of ammonium perchlorate; 10 kilograms of copper oxide. Add these components into the heating reactor and start heating. After the temperature reaches 70°C, use a basket sand mill to disperse for 1 minute to obtain the material, keep the material temperature at 70°C, use a double-flow spray granulator to dry the material, and spray granulate The air inlet temperature of the machine is 80°C, the fan frequency is 50HZ, and the nozzle diameter is 5mm to obtain dry particles 1. Use a conical granulator to pass the particles 1 through a 60-mesh sieve to obtain particles 2. Use a vibrating fluidized bed for the particles 2. Dried in a dryer until the final water content is not more than 0.5% W, and finally compressed into a cylindrical tablet with an outer diameter of 4 mm and an inner diameter of 1 mm using a rotary tablet press.

Embodiment 2

[0037] 20 kg of guanidine nitrate; 50 kg of basic copper nitrate with a solid content of 60% W; 15 kg of 5-aminotetrazole (5AT); 5 kg of potassium perchlorate and 300 kg of water. Add these components into the reaction kettle and start heating. After the temperature reaches 90°C, use a basket sand mill to disperse for 5 hours to obtain the material, keep the material temperature at 90°C, use a double-flow spray granulator to dry the material, and use a three-flow spray granulator. The granulator dries the material, the air inlet temperature of the spray granulator is 150°C, the fan frequency is 1HZ, the nozzle diameter is 2mm, and the dried particles 1 are obtained, and the particle 1 is passed through a 20-mesh sieve by a vibrating screen to obtain the particle 2, and the belt type is used. The particles 2 are dried in a vacuum dryer until the final water content is no more than 0.1% W, and finally compressed into a cylindrical tablet with a diameter of 6 mm using an oil press...

Embodiment 3

[0039] 30 kilograms of guanidine nitrate; 65 kilograms of solid content are basic copper nitrate of 45% W, 150 kilograms of water. Add these components into the reaction kettle and start heating. After the temperature reaches 80°C, use a basket sand mill to disperse for 30 minutes to obtain the material, keep the material temperature at 80°C, use a three-flow spray granulator to dry the material, and use a double-flow spray granulator. The granulator dries the material, the air inlet temperature of the spray granulator is 110°C, the fan frequency is 25HZ, the nozzle diameter is 2mm, and the dried granule 1 is obtained, and the granule 1 is passed through a 30-mesh sieve by a conical granulator to obtain the granule 2, The particle 2 is dried to a final water content of not more than 0.1% W using a belt vacuum dryer, and finally pressed into a circular tablet with an outer diameter of 5 mm and an inner diameter of 1 mm.

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Abstract

The invention discloses a high-burning rate gas generating agent and a granulation method thereof. The granulation method comprises adding guanidine nitrate, basic copper nitrate, auxiliaries and water into a container, carrying out heating under control of the temperature in a range of 70-90 DEG C, stirring to disperse the mixture through a dispersing device to obtain a uniform mixture, drying the mixture through an atomizing device to obtain dry particles 1, finishing the dry particles 1 to obtain particles 2, drying the particles 2 to obtain particles 3, and tabletting the particles 3. Thehigh-burning rate gas generating agent has a high combustion speed and satisfies the performance requirements of side gasbags to a generating device with special speed requirements. The granulation method can reduce a raw material cost, is free of drying and crushing treatment on raw materials before use, guarantees full contact and mixing of components, improves product stability and consistency,realizes full dissolution of soluble raw materials through a heating dissolution method, utilizes a basket mill and unbaked wet basic copper nitrate to grind and disperse so that a uniform material is obtained, is easy to operate and has high production efficiency.

Description

technical field [0001] The invention relates to a high burning rate gas generating agent and its granulation process. Background technique [0002] Some automobile safety protection buffer systems mainly use pyrotechnic gas generators to inflate the airbags or drive the seat belt tensioner, so as to slow down the damage caused by the collision process of the car and minimize the damage to the driver and passengers. The requirements for the inflation performance and safety performance of automobile airbags are gradually increasing, which requires the performance of gas generants to be continuously improved. [0003] The side airbag gas generator is generally installed in the seat. Due to the short distance from the human body, it is required that the pressure build-up process of the gas generating agent be fast and the outlet pressure repeated and stable during the combustion process. At the same time, its production cost is required to be lower. This requires that the gas ...

Claims

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Application Information

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IPC IPC(8): C06B31/02C06B31/00C06D5/06
CPCC06B31/00C06B31/02C06D5/06
Inventor 张文龙王秋雨王小强范智陈樊刘伟屈纯姚俊
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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