Metal hydrazine complexes for use as gas generants
First Claim
1. A solid gas generating composition formulated for generating gas suitable for use in deploying an air bag or balloon from a supplemental safety restraint system, said gas generating composition comprising:
- a complex of a metal cation and at least one neutral ligand comprising hydrazine such that when the complex combusts, a mixture of gases containing nitrogen gas and water vapor is produced;
sufficient oxidizing anion to balance the charge of the metal cation, said, solid gas generating composition containing (a) a co-oxidizer, (b) a secondary fuel, or (c) both a co-oxidizer and a secondary fuel, wherein the complex consists essentially of at least one metal nitrate hydrazine.
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Accused Products
Abstract
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 ammine, metal nitrate ammine, and metal perchlorate ammine 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.
179 Citations
15 Claims
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1. A solid gas generating composition formulated for generating gas suitable for use in deploying an air bag or balloon from a supplemental safety restraint system, said gas generating composition comprising:
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a complex of a metal cation and at least one neutral ligand comprising hydrazine such that when the complex combusts, a mixture of gases containing nitrogen gas and water vapor is produced;
sufficient oxidizing anion to balance the charge of the metal cation, said, solid gas generating composition containing (a) a co-oxidizer, (b) a secondary fuel, or (c) both a co-oxidizer and a secondary fuel, wherein the complex consists essentially of at least one metal nitrate hydrazine. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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2. A solid gas generating composition formulated for generating,gas suitable for use in deploying an air bag or balloon from a supplemental safety restraint system, said gas generating composition comprising:
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a complex of a metal cation and at least one neutral ligand comprising hydrazine such that when the complex combusts, a mixture of gases containing nitrogen gas and water vapor is produced;
sufficient oxidizing anion to balance the charge of the metal cation, said solid gas generating composition containing (a) a co-oxidizer, (b) a secondary fuel, or (c) both a co-oxidizer and a secondary fuel, wherein the complex in said gas generating composition is a cobalt (III) nitrate hydrazine, and said gas generating composition further comprises 0.1 to 6 weight percent of carbon powder, and a binder in an amount of 0.5 to 12 percent by weight.
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13. An inflator assembly for an inflatable safety system comprising:
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(a) a gas generator housing having at least one gas outlet;
(b) a pyrotechnic propellant composition disposed inside said gas generator housing, said propellant composition comprising a compound containing hydrazine, wherein said compound containing hydrazine comprises a metal complex of hydrazine; and
(c) a propellant ignition assembly. - View Dependent Claims (14, 15)
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Specification