Low particulate igniter composition for a gas generant
First Claim
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1. An igniter composition comprising:
- about 50 to about 75 composition weight percent of an oxidizer comprising strontium nitrate;
about 0.5 to about 35 composition weight percent of an Al/Mg alloy fuel component, said Al/Mg alloy fuel component having an Al content of about 50 to about 80 percent and a Mg content of about 50 to about 20 percent; and
about 1 to about 20 composition weight percent of a gas-producing fuel component.
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Abstract
Igniter compositions and methods of processing are provided which produce or result in relatively little particulate material, as compared to typical igniter compositions used in association with vehicle occupant restraint airbag cushions.
38 Citations
21 Claims
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1. An igniter composition comprising:
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about 50 to about 75 composition weight percent of an oxidizer comprising strontium nitrate; about 0.5 to about 35 composition weight percent of an Al/Mg alloy fuel component, said Al/Mg alloy fuel component having an Al content of about 50 to about 80 percent and a Mg content of about 50 to about 20 percent; and about 1 to about 20 composition weight percent of a gas-producing fuel component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A reduced particulate igniter composition for a gas generant material, said igniter composition comprising:
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about 50 to about 75 composition weight percent of an oxidizer comprising strontium nitrate and potassium nitrate, wherein no more than about 50 mass percent of the oxidizer is potassium nitrate; about 0.5 to about 35 composition weight percent of an Al/Mg alloy fuel component having an Al content of about 50 to about 80 percent and a Mg content of about 50 to 20 percent; and about 1 to about 20 composition weight percent of a gas-producing water-soluble organic polymer binder fuel component, said igniter composition having a combustion flame temperature of at least about 2750 K and, upon combustion, said igniter composition produces combustion products including condensible combustion products and wherein no more than about 50 mass percent of the condensible combustion products melt at a temperature of less than about 2750 K. - View Dependent Claims (18, 19)
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20. A method of processing an igniter composition for a gas generant material, said method comprising the steps of:
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admixing about 10 to about 20 weight percent water to an igniter composition precursor mix containing, on a water free basis, about 50 to about 75 percent of an oxidizer comprising strontium nitrate, about 0.5 to about 35 percent of an Al/Mg alloy fuel component and about 1 to about 20 percent of a gas-producing fuel component comprising a water-soluble organic polymer binder to form a moisture-containing igniter precursor mass; and sizing and drying the moisture-containing igniter precursor mass to form a granular igniter material of selected particle size. - View Dependent Claims (21)
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Specification