Gas generant

a technology of generant and gas, applied in the field of gas generating system, can solve the problems of generant that exhibits relatively low sensitivity, etc., and achieve the effects of reducing the filtration requirements of the inflator over time, reducing the sensitivity of the generant, and improving the filtration efficiency of the inflator

Inactive Publication Date: 2007-04-19
AUTOMOTIVE SYST LAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012] The use of certain additives, preferably zeolites such as molecular sieves, calcium sulfate (Drierite™), or calcium oxide can minimize, and in some cases eliminate contaminants occurring within the inflator over time. In particular, molecular sieves function to better retain moisture and other contaminants in the presence of relatively high tem...

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.
An equally important challenge is to manufacture gas generants that exhibit relatively low sensitivity with regard to impact, friction, or electrostatic discharge stimuli.
Yet another challenge with gas generant composi...

Method used

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Examples

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example 1

[0033] To form comparative compositions, dry mixes of formulations containing the various constituents described above were prepared in a known manner. The dry material (containing less than 0.2% moisture by mass) was then tableted, loaded into inflators, and subjected to USCAR Thermal Shock conditioning (200 Cycles, −40 C to 90 C). These formulations indicated an increase in aggressive ballistic performance when deployed at 85 C.

[0034] Next, the same process was used to prepare gas generants containing the various constituents described above, and a small amount of additive was added to each inflator. A ratio of 100:1 was used for the mass of gas generant to additive. The additive employed was 13X Type Molecular Sieves because of its inert chemical tendencies and ability to scavenge moisture and other volatiles, and retain these contaminants at relatively higher temperatures such as 107 degrees Celsius. The gas generant contained little moisture (less than 0.2% by mass). After USC...

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Abstract

The present invention includes a gas generator 10 that incorporates a gas generating composition 12 and a scavenging additive 16 in heterogeneous but vapor/gaseous communication with the gas generating composition 12. The scavenging additive retains moisture/contaminants typically evolving over time at relatively higher temperatures. The present invention further includes a gas generating system 180 incorporating the gas generator 10.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application claims the benefit of U.S. Provisional Application Ser. No. 60 / 722,168 filed on Sep. 30, 2005.TECHNICAL FIELD [0002] The present invention relates generally to gas generating systems, and to gas generant 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 small 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. [0004] An equally important challenge is to manufacture gas generants that exhibit relatively low sensitivity with regard to impact, friction, or ...

Claims

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Application Information

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IPC IPC(8): C06B41/02
CPCC06B23/006C06B23/009C06B23/02C06D5/06
Inventor BURNS, SEAN P.HALPIN, JEFFREY W.WILLIAMS, GRAYLON K.KHANDHADIA, PARESH S.HORDOS, DEBORAH L.NEWELL, JASON
Owner AUTOMOTIVE SYST LAB
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