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Gas generant compositions

a technology of compositions and gas, applied in the direction of pressure gas generation, explosives, weapons, etc., can solve the problem of filtration requirements of inflators

Inactive Publication Date: 2007-12-06
TK HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is an ongoing challenge to reduce the amount of solids and increase the amount of gas thereby decreasing the filtration requirements for an inflator.

Method used

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  • Gas generant compositions
  • Gas generant compositions

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018]A composition was formed by homogeneously mixing dry copper 5-aminotetrazole at 30 weight percent and dry phase stabilized ammonium nitrate at about 70 weight percent of the total composition. The resultant gas yield was about 88.5% of the total combustion products. The % weight loss when heat aged at 107 C for about 400 hours measured about 0.30 to 0.50 weight percent of the total composition.

example 4

[0021]A composition was formed in accordance with the present invention, and in the same manner as given in Example 1. Burn rate tests were performed by employing samples weighing about 2.6 grams, having about 0.45 inches in height, and having about 0.5 inches in diameter. Each respective sample was ignited under the pressures indicated, and the burn rate was thereby measured. The burn rate was about 0.48 inches per second (ips) at 1000 psig; about 0.65 ips at 1500 psig; about 0.72 ips at about 2000 psig; about 0.88 ips at 2500 psig; about 0.82 ips at 3000 psig; about 1.19 at about 4000 psig; about 1.18 at about 4500 psig; and about 1.28 at about 5500 psig.

example 6

[0023]A composition was formed in accordance with the present invention, and in the same manner as given in Example 1. Differential scanning calorimetry (DSC) evaluations indicated an exotherm at 258.89 C, prior to heat aging as per USCAR requirements. After heat aging at 107 C for about 400 hours, DSC evaluations indicated an exotherm at 266.19 C, thereby exemplifying the thermal stability of the present compositions, before and after heat aging.

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Abstract

A gas generant composition is provided that contains a transitional metal salt of 5-aminotetrazole and phase stabilized ammonium nitrate. A gas generator incorporating the gas generant composition is also provided. The gas generator may be contained within a gas generating system such as an airbag inflator or seat belt assembly, or more broadly within a vehicle occupant protection system.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of U.S. Provisional Application Ser. No. 60 / 810,006 filed on May 31, 2006.TECHNICAL FIELD[0002]The present invention relates generally to gas generating systems, and to gas generating compositions employed in gas generator devices for automotive restraint systems, for example.BACKGROUND OF THE INVENTION[0003]The present invention relates to gas generant compositions that upon combustion produce a relatively smaller amount of solids and a relatively abundant amount of gas. It is an ongoing challenge to reduce the amount of solids and increase the amount of gas thereby decreasing the filtration requirements for an inflator. As a result, the filter may be either reduced in size or eliminated altogether thereby reducing the weight and / or size of the inflator. Additionally, reduction of combustion solids provides relatively greater amounts of gaseous products per gram or unit of gas generating composition. A...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C06B31/28
CPCC06D5/06
Inventor HORDOS, DEBORAH L.
Owner TK HLDG
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