Hydroxylammonium nitrate/water/self-deflagrating fuels as gas generating pyrotechnics for use in automotive passive restraint systems
AssigneeMorton International, Inc.
InventorsMichael W. Barnes, Bradley D. Harris, Darrin L. Johnson
Life of this patent
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Abstract
Liquid gas generant compositions are aqueous solutions of hydroxylammonium nitrate as the oxidizer and a fuel selected from the group consisting of nitrate salts of amines of the formulae: A.sup.1) an amino tetrazole or amino triazole, A.sup.2) an amine of the formulae (I) (NHZ).sub.2 --C.dbd.O, (II) (NHZ).sub.2 --C.dbd.NZ, (III) HN--(CO--NHZ).sub.2, where the Zs are the same or different and are selected from H and NH.sub.2, A.sup.3) C.sub.2 -C.sub.3 -alkyldiamine, and mixtures of the nitrate salts of amines of the above formulae.
Claims6
A liquid gas generant composition for inflating automotive airbags comprising A) between about 50 and about 80 wt. % of a fuel, and between about 20 and B) about 50 wt % of hydroxylammonium nitrate as oxidizer based on total weight of A) plus B);
- plus C) sufficient water to dissolve or slurry A) and B) therein,
- said fuel A) being a nitrate salt of an amine selected from the group consisting of:
- A.sup.1) an amino tetrazole or amino triazole,
- A.sup.2) a compound of the formulae (I) (NHZ).sub.2 --C.dbd.O, (II) (NHZ).sub.2 --C.dbd.NZ, (III) HN--(CO--NHZ).sub.2, where the Zs are the same or different and are selected from H and NH.sub.2,
- A.sup.3) C.sub.2 -C.sub.3 -alkyldiamine, and
- mixtures of the nitrate salts of amines of the above formulae.
A liquid gas generant composition for inflating automotive airbags comprising A) between about 50 and about 80 wt. % of a fuel, and B) between about 20 and about 50 wt % of hydroxylammonium nitrate as oxidizer based on total weight of A) plus B) plus C) sufficient water to dissolve or slurry A) and B) therein,
- said fuel A) being a nitrate salt of an amine selected from the group consisting of:
- A.sup.1) an amino tetrazole or amino triazole,
- A.sup.2) a compound of the formulae (I) (NHZ).sub.2 --C.dbd.O, (II) (NHZ).sub.2 --C.dbd.NZ, (III) HN--(CO--NRZ).sub.2, where the Zs are the same or different and are selected from H and NH.sub.2,
- A.sup.3) C.sub.2 -C.sub.3 -alkyldiamine, and
- mixtures of the nitrate salts of amines of the above formulae,
- said fuel and said hydroxylammonium nitrate being used at a stoichiometric ratio of between about 0.9 and about 1.1.
Dependencies are inferred from the claim text.