Metal complexes for use as gas generants

C - Chemistry – Metallurgy – 06 – D

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C06D 5/06 (2006.01) B60R 21/26 (2006.01)

Patent

CA 2261601

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, sufficient oxidizing anion to balance the charge of the complex, and at least one cool burning organic nitrogen-containing compound. 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.

L'invention concerne des compositions génératrices de gaz et leurs procédés d'utilisation. On utilise des complexes métalliques tels que des compositions génératrices de gaz. Ces complexes comprennent un modèle de cation métallique, un ligand neutre contenant de l'hydrogène et de l'azote, un anion suffisamment oxydant pour équilibrer la charge du complexe, et au moins un composé organique brûlant à froid contenant de l'azote. Les complexes sont formulés de sorte que lorsque le complexe brûle, de l'azote sous forme de gaz et de la vapeur d'eau sont produites. On peut citer à titre d'exemples spécifiques de ces complexes l'amine à nitrite de métal, l'amine de nitrate de métal et des complexes d'amines de perchlorate de métal, ainsi que des complexes d'hydrazine. On peut combiner un liant et un co-oxydant avec les complexes métalliques afin d'améliorer la cohésion des compositions génératrices de gaz et de permettre une combustion efficace du liant. Ces compositions génératrices de gaz sont adaptables à une utilisation dans des dispositifs générateurs de gaz tels que des coussins gonflables de sécurité pour automobiles.

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