Metal complexes for use as gas generants

C - Chemistry – Metallurgy – 06 – D

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C06D 5/04 (2006.01) B01J 7/00 (2006.01) C06B 29/00 (2006.01) C06B 31/00 (2006.01) C06B 41/00 (2006.01) C06D 5/06 (2006.01) B60R 21/26 (2006.01)

Patent

CA 2227872

Gas generating compositions and methods for their use are provided. Metal complexes are used as gas generating compositions. These complexes are comprised of a metal cation template, a neutral ligand containing hydrogen and nitrogen, and sufficient oxidizing anion to balance the charge of the complex. The complexes are formulated such that when the complex combusts, nitrogen gas and water vapor is produced. Specific examples of such complexes include metal nitrite amine, metal nitrate amine, and metal perchlorate amine complexes, as well as hydrazine complexes. A binder and co-oxidizer can be combined with the metal complexes to improve crush strength of the gas generating compositions and to permit efficient combustion of the binder. Such gas generating compositions are adaptable for use in gas generating devices such as automobile air bags.

Compositions générant du gaz et leurs procédés d'utilisation. Des complexes métalliques sont utilisés comme compositions génératrices de gaz. Ces complexes sont constitués d'une base à cations métalliques, d'un ligand neutre contenant de l'hydrogène et de l'azote, et d'un anion oxydant suffisant pour équilibrer la charge du complexe. Les complexes sont formulés de telle façon que lorsque le complexe entre en combustion, de l'azote gazeux et de la vapeur d'eau sont produits. Comme exemples de ces complexes, on peut citer les complexes d'amine de nitrite métallique, d'amine de nitrate métallique et d'amine de perchlorate métallique, ainsi que les complexes d'hydrazine. Un liant et un co-oxydant peuvent être associés aux complexes métalliques en vue d'améliorer la cohésion des compositions génératrices de gaz et de permettre une combustion efficace du liant. Ces compositions génératrices de gaz peuvent être adaptées pour utilisation dans les dispositifs de génération de gaz tels que les coussins de sécurité gonflables pour automobiles.

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