Metal complexes for use as gas generants
First Claim
1. A gas generating composition, comprising:
- at least one metal complex comprising a metal cation, a hydrazine ligand, and sufficient oxidizing anion to balance the charge of the metal cation, wherein the gas generating composition comprises about 48.5% to less than about 100% by weight of the at least one metal complex.
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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.
108 Citations
65 Claims
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1. A gas generating composition, comprising:
at least one metal complex comprising a metal cation, a hydrazine ligand, and sufficient oxidizing anion to balance the charge of the metal cation, wherein the gas generating composition comprises about 48.5% to less than about 100% by weight of the at least one metal complex. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A gas generating device, comprising:
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a gas generating composition comprising at least one metal complex of a transition metal cation or alkaline earth metal cation, a hydrazine ligand, and sufficient oxidizing anion to balance the charge of the metal cation, such that when the at least one metal complex combusts, a mixture of gases containing nitrogen gas and water vapor is produced; and
an igniter to ignite the gas generating composition. - View Dependent Claims (29)
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30. An air bag system for a vehicle comprising:
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a collapsed, inflatable air bag;
a gas generating device connected to the collapsed, inflatable air bag for inflating the collapsed, inflatable air bag, wherein the gas generating device includes a gas generating composition comprising at least one metal complex of a transition metal cation, a hydrazine ligand, and sufficient oxidizing anion to balance the charge of the transition metal cation; and
an igniter to ignite the gas generating composition. - View Dependent Claims (31, 32)
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33. A vehicle equipped with a supplemental restraint system, the supplemental restraint system including an air bag system which comprises:
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a collapsed, inflatable air bag;
a gas generating device connected to the collapsed, inflatable air bag for inflating the collapsed, inflatable air bag, wherein the gas generating device contains a gas generating composition comprising at least one metal complex of a transition metal cation, a hydrazine ligand, and sufficient oxidizing anion to balance the charge of the transition metal cation; and
an igniter to ignite the gas generating composition. - View Dependent Claims (34, 35, 36, 37)
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38. A method of inflating an inflatable air bag or balloon comprising:
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generating substantially non-toxic gases by combusting an at least essentially azide-free gas generating composition comprising at least one metal complex having a transition metal cation or alkaline earth metal cation and at least one neutral ligand comprised of ammonia, and sufficient oxidizing anion to balance the charge of the metal cation, wherein when the at least essentially azide-free gas generating composition combusts, a substantially non-toxic mixture of gases comprising nitrogen gas and water vapor is produced; and
inflating the inflatable air bag or balloon with the substantially non-toxic mixture of gases. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65)
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Specification