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Gas generant igniter composition and method

A technology of gas and gas generating agent, which is applied in the field of inflatable materials for inflatable devices to ignite, gas generating agent materials, and can solve the problems of aggravated processing and disposal, difficulties, dangers, etc.

Inactive Publication Date: 2005-08-10
AUTOLIV DEV AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While rapid ignitability of ignitant formulations is generally desirable in general inflatable containment system use, ignitability at ambient conditions can create or aggravate the handling and handling of ignitant formulations and devices containing such formulations Deal with pertinent hazards, difficulties and related problems

Method used

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  • Gas generant igniter composition and method
  • Gas generant igniter composition and method
  • Gas generant igniter composition and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In these tests, the ignition rate of the igniter compositions of the present invention was evaluated as a function of pressure.

[0031] Specifically, a 1 gram sample of an igniter composition comprising 68.58% by weight strontium nitrate and 31.42% by weight Al / Mg alloy having a 70% Al content was placed in a metal cup, The content of Mg is 30%. The cup containing the igniter composition was placed in a 1 liter closed pressure vessel capable of being pressurized to several thousand psi with nitrogen. The pressure vessel is equipped with a pressure sensor to accurately measure the pressure in the pressure vessel.

[0032] An ignition wire was passed through the sample igniter composition and connected to an electrode mounted on the lid of the pressure vessel. Then pressurize the pressure vessel to the required pressure and let the ignition current pass through the ignition wire. Pressure versus time data is collected as the sample burns. Upon ignition, a small amoun...

Embodiment 2 and comparative example 1

[0036] In these examples, 30 grams were coated with the igniter composition of Example 1 (i.e. Example 2) and a standard igniter composition comprising 25% by weight boron and 75% by weight potassium nitrate (i.e. Comparative Example 1) Gas generant pellets (diameter = 3 / 8 inch, thickness = 0.110 inch) consisting of 47.21 wt% guanidine nitrate, 40.62 wt% ammonium nitrate, 7.17 wt% diamine copper dinitrate and 5.00 wt% silica. In each case, the relative amount of each igniter composition applied was 7% by weight of such igniter composition based on the total weight of the ignition-enhancing (ie coated) gas generant.

[0037] Each ignition-enhancing gas generant material was then added to an inflation simulator test rig (ie, reusable steel hardware designed to simulate an air bag inflator assembly). The test device is equipped with a detonator for igniting the sample ignition enhanced gas generant material, and a pressure sensor is mounted on one side of the device to allow dyna...

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Abstract

An igniter composition for a gas generant and related methods of gas generation are provided in which the igniter composition desirably avoids or is not prone to being ignited by thermal means at ambient pressure conditions.

Description

background of the invention [0001] The present invention relates generally to the generation of gases, and more particularly to materials for inflating gas generating agent materials, such as inflatable devices such as air bag cushions used in inflatable containment systems for the protection of vehicle occupants To ignite. [0002] It is known to use gas-inflatable or inflatable cushions or bags such as "airbag cushions" to protect vehicle occupants when the vehicle encounters sudden deceleration, such as in a crash. In such systems, the airbag cushions are typically stored in an uninflated and folded state to minimize space requirements. Such systems typically also have one or more crash sensors mounted on or to the vehicle's frame or body to detect sudden deceleration of the vehicle and thereby electronically trigger activation of the system. Upon activation of the system, a corresponding airbag cushion immediately begins to inflate in about no more than a few millisecond...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R21/26B01J7/00C06B31/02C06B33/00C06B33/04C06C9/00C06D5/00
CPCC06C9/00C06B33/04
Inventor I·V·门登霍尔R·D·泰勒D·W·帕金森G·B·黑斯
Owner AUTOLIV DEV AB
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