Gas generating agent and preparing method thereof

A gas generating agent and solvent technology, which can be used in the production of compressed gas, attacking equipment, vehicle parts, etc., and can solve the problems of poor comprehensive performance of gas generating agents.

Active Publication Date: 2014-03-12
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention overcomes the defects of poor overall performance of existing gas generating agents and limited application in gas generators, and provides a gas generating agent with high gas production efficiency, adjustable burning speed, long service life and less residue, suitable for use in Gas generating agent with better comprehensive performance for gas generators of various airbags and preparation method thereof

Method used

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  • Gas generating agent and preparing method thereof

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Effect test

preparation example Construction

[0021] The present invention also provides a method for preparing the above-mentioned gas generating agent, which includes mixing the first flammable agent and the first oxidant with a solvent, and mixing the second flammable agent and the second oxidizer with a solvent; A gas generating agent with an A / B core-shell structure was obtained.

[0022]The first flammable agent and the first oxidant are mixed with solvent, the second flammable agent and the second oxidant are mixed with solvent. The temperature can be -10-90°C, preferably 20-70°C; the time for mixing is as long as the surface of the mixture is smooth, the structure is uniform and dense, and there is no hard material, for example, it can be 10-60 minutes, preferably 10-30 minutes Specifically, the first combustible agent and the first oxidizing agent, and the second combustible agent and the second oxidizing agent can be dry-mixed in a mixer for about 6 minutes, and a solvent is added to the mixer, mixed and prepare...

Embodiment 1

[0030] (1) Add 54wt% guanidine nitrate (molecular weight 122.08g / mol) with a particle size of 1-10μ, 34wt% basic copper nitrate with a particle size of 1-6μ, 5wt% potassium nitrate with a particle size of 1-6μ, and 3wt% perchloric acid with a particle size of 10-20μ Ammonium, 3wt% aluminum oxide with a particle size of 1-5μ was added to the vacuum kneader and mixed for 8 minutes, and then a solvent of about 27wt% alcohol acetone (volume ratio 4:1) of the total amount of the above substances was added to mix, and the vacuum pump was turned on. Discharge A1 at 11wt%;

[0031] Add 12wt% nitrocellulose (molecular weight 504.28g / mol), 78wt% strontium nitrate with a particle size of 1 to 6μ to a vacuum kneader for 8 minutes, and then add about 27wt% alcohol acetone (volume ratio 4:1 ) solvent, turn on the vacuum pump, and discharge B1 when the volatile content is 11wt%.

[0032] (2) Add materials A1 and B1 to the inner runner and outer runner of the dual-channel mold respectively. ...

Embodiment 2

[0034] The same mold method as in Example 1 was used to prepare a gas generating agent sample S2 with an A / B core-shell structure having a hollow inner core with a thickness of 0.8 mm in layer A and a thickness of 0.2 mm in layer B. The difference is preparation B1, 65 wt % nitrocellulose (molecular weight 504.28 g / mol), 35 wt % ammonium nitrate with a particle size of 1 to 10 μ was added to the vacuum kneader for 8 minutes, and then about 27 wt of the total amount of the above substances was added % alcohol acetone (volume ratio 4:1) was mixed, the vacuum pump was turned on, and B1 was discharged when the volatile matter content was 11wt%.

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Abstract

The invention provides a gas generating agent and a preparing method of the gas generating agent. The gas generating agent is of an A/B core shell structure. A core A comprises a first combustible agent and a first oxidizing agent, and a shell B comprises a second combustible agent and a second oxidizing agent. The combustion speed of the second combustible agent is lower than that of the first combustible agent, and the gas generating agent not only is adjustable in combustion speed and suitable for gas generators of various gas bags, but also is high in gas generation efficiency, long in service life and little in residue. Meanwhile, a coating structure can enable the gas generator to be longer in acting time and also has a very good moisture proof effect, so that service life of the gas generating agent is greatly prolonged, and using performance is very good. The gas generating agent is simple in technology, easy to prepare, free of harm and pollution and easy to produce in a large-scale mode.

Description

technical field [0001] The invention relates to a gas generating agent for generating deflagration or propellant gas, in particular to a gas generating agent for an airbag and a preparation method thereof. Background technique [0002] With the improvement of people's quality of life, the popularity of automobiles has become wider and wider, and automobile safety issues have increasingly attracted consumers' attention. The generating agent must meet the following requirements: safe and reliable, and timely; under high and low normal temperature environments, the relevant functions should meet the requirements of the automotive airbag gas generator industry; the generated gas is basically non-toxic and non-corrosive, and has no harm to personnel; the gas temperature As low as possible to prevent fire or burn personnel; meet equipment and storage requirements; low residue rate, high gas production rate, etc. [0003] Sodium azide formula gas generating agent has low combustio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R21/264C06D5/06
Inventor 郑东升
Owner BYD CO LTD
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