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Novel gas generating agent for airbag device

An airbag device and a gas generating agent technology, which are applied in the generation of compressed gas, pedestrian/passenger safety arrangement, vehicle safety arrangement, etc., can solve the problem of occupant body contact parts or equipment, high air supply pressure rate, and easy airbag bags. Injury and other problems, to achieve good thermal stability, moderate burning intensity, and favorable environmental protection effects

Inactive Publication Date: 2021-04-09
陈肇明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The gas generating agents that can produce gas quickly are basically high-energy substances. After being activated and ignited, they will burn violently. The gas supply time is only on the millisecond level. It is common that the gas supply pressure rises at an early rate too high, which makes the airbag easy to be damaged. Problems with occupant body contact parts or equipment

Method used

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  • Novel gas generating agent for airbag device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Compress the above-mentioned test samples into the required tablets, fill an appropriate amount of samples in the cavity of the gas generation tester according to the regulations, and then install them in the 60L test box, ignite the test samples with an igniter, and use the pressure sensor installed in the test box to measure Get the pressure rise curve in the box, see figure 1 shown.

[0026] Summary of test results:

[0027] (1) The result of the pressure rise curve P-T meets the requirements for the use of the airbag device.

[0028] (2) The initial rate of pressure rise (20-40ms) is 3.0 kPa / millisecond, compared with the initial pressure rise rate of 5.7 kPa / millisecond of the traditional airbag gas generant of the same type under the same conditions, it is reduced 47%.

[0029] The above results show that: the gas generating agent of the present invention can provide gas in time, and the initial rate of pressure rise is relatively easy to adjust, which is benef...

Embodiment 2

[0031] The gas generated by the ignition and combustion of the above-mentioned embodiment 1 was collected for composition testing, and the results showed that the main components were nitrogen, carbon dioxide, water vapor, and oxygen, and the specific measurement results were as follows

[0032] Table 1 shows.

[0033]

[0034] In addition, the content of harmful gases carbon monoxide, nitrogen monoxide, nitrogen dioxide and ammonia in the generated gas is extremely low, which meets the purpose of use. The specific measurement results are shown in Table 2 below.

[0035]

[0036] The above gas analysis results show that the gas generated by the combustion of the gas generating agent of the present invention is very clean and suitable for use in airbag devices.

Embodiment 3

[0038] Use DSC differential scanning calorimeter to test the decomposition temperature of the sample. The test results show that the sample does not decompose below 200 degrees Celsius. For details, see figure 2 As shown, it shows that the gas generating agent of the present invention has good thermal stability and meets the requirements for use of the airbag device.

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Abstract

The invention discloses a novel gas generating agent for an airbag device. The novel gas generating agent comprises N, N'-dicarbamylhydrazine, nitrate, an adhesive and an additive. According to the invention, the content ratios of the components are as follows: 43-73wt% of N, N'-dicarbamylhydrazine, 21-51wt% of the nitrate, 2-10% of the adhesive and 1-6% of the additive. The nitrate is preferably potassium nitrate, the adhesive is preferably glycidyl azide polymer, and the additive is preferably clay. The particle size of the N, N'-dicarbamylhydrazine, the nitrate and the additive is preferably 1 micron to 100 microns. The invention has the obvious advantages that: the combustion intense degree is moderate, gas can be provided in time, the rate at the initial stage of pressure rise (20-40ms) is easy to adjust, the problems that an airbag damages the body contact part of an automobile passenger or equipment due to overlarge rate at the initial stage of pressure rise and the like are avoided, thermal decomposition does not occur at the temperature of 200DEG C or below, main gas generated by combustion is non-toxic components such as nitrogen, carbon dioxide, water vapor and oxygen, and the raw materials are non-toxic and low in pollution.

Description

technical field [0001] The invention relates to the field of gas generating agents, in particular to a novel gas generating agent for an airbag device. Background technique [0002] Airbag devices are used to protect the safety of vehicle occupants, etc., and their applications are expanding. [0003] The gas of the airbag device is generated by the gas generator installed inside it, and its core component is the gas generating agent. After the gas generating agent is activated and ignited, it can burn quickly and generate high-temperature and high-pressure gas, and rapidly expand the airbag bag to achieve the purpose of protecting the human body, equipment and other life-saving emergencies. [0004] The gas generating agents that can produce gas quickly are basically high-energy substances. After being activated and ignited, they will burn violently. The gas supply time is only on the millisecond level. It is common that the gas supply pressure rises at an early rate too h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B31/02C06D5/06B60R21/26
CPCB60R21/26C06B31/02C06D5/06
Inventor 陈肇明
Owner 陈肇明