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Rapid Gas Generating Pyrotechnical Composition and Method for Obtaining Same

A kind of composition, pyrotechnic technology, applied in the gas generating agent of air cushion inflation, the field of preparing such pyrotechnic composition, can solve the problems of short operation time, difficult to ignite, difficult and the like

Inactive Publication Date: 2012-12-12
GERAKL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, these compositions have the following disadvantages: the burning speed is relatively slow, less than or equal to 20mm / s at 20MPa, and it is difficult to ignite
Also, it is difficult to use it in hybrid and side generators that require very short operating times (10 ms-20 ms)

Method used

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  • Rapid Gas Generating Pyrotechnical Composition and Method for Obtaining Same
  • Rapid Gas Generating Pyrotechnical Composition and Method for Obtaining Same
  • Rapid Gas Generating Pyrotechnical Composition and Method for Obtaining Same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 4

[0015] GN+BCN+KClO 4 (Example 4 hereinafter) 32mm / s

[0016] GN+BCN+KClO 4 + compaction (Example 5 hereinafter) 38.2 mm / s.

[0017] According to its first object, the invention therefore relates to a gas-generating pyrotechnic composition combining two features. The pyrotechnic gas composition:

[0018] + Contains the following main constituent (active) ingredients:

[0019] - reducing raw materials in the form of at least one organic nitrogen compound;

[0020] - an oxidizing feedstock in the form of at least one alkali metal nitrate; and

[0021] - less than 30% by mass of a second oxidizing raw material in the form of at least one alkali metal perchlorate,

[0022] The feedstock represents at least 95% by mass (typically at least 98% by mass) of the feedstock present; and

[0023] + Said composition is obtained via a dry rolling step of a powder mixture consisting essentially of said powder ingredients.

[0024] A pyrotechnic composition according to the invention c...

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Abstract

The invention concerns gas generating pyrotechnical compositions, of which at least 95 wt. % of the charges consist of the following constituting ingredients: a reducing charge in the form of at least one nitrogen-containing compound; an oxidizing charge in the form of at least one basic metal nitrate; and at least 30 wt. % of a second oxidizing charge in the form of at least one alkali metal perchlorate. Said compositions are obtained via a dry process roller compacting step of a powdery mixture consisting essentially of said ingredients in powder form. The invention also concerns the method for obtaining said compositions. The inventive compositions exhibit interesting combustion speeds.

Description

[0001] This application is a divisional application of an invention patent application with the filing date of October 12, 2006, the application number of 200680043374.5, and the title of "Pyrotechnic composition for rapidly generating gas and its preparation method". technical field [0002] This invention relates to pyrotechnic gas generants, in particular to gas generants for inflating air cushions used in automotive occupant restraint systems. More precisely, the present invention relates to pyrotechnic compositions, known as cold pyrotechnic compositions, capable of rapidly producing clean, non-toxic gases at temperatures acceptable for automotive safety, defined as temperatures below 2200K. The invention also relates to a method of preparing such a pyrotechnic composition. Background technique [0003] In the context of automotive safety, the pyrotechnic composition used in the gas generator must deliver the gas in the quantities necessary to fill the air-filled cushio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B33/14
CPCC06D5/06C06B21/0041C06B21/0066
Inventor 弗雷德里克·马琳
Owner GERAKL