Gas generating composition and gas generator
AssigneeNof Corporation
InventorsKazuya Serizawa, Katsuhiko Takahashi
Life of this patent
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Abstract
A stable, low-temperature ignition gas generating composition has a heating starting temperature of 170 to 220° C. The gas generating composition includes ammonium perchlorate, a chlorine scavenger, and microcrystalline carbon powder. The chlorine scavenger is sodium nitrate or aluminun/magnesium mixed powder, and the microcrystalline carbon powder is activated carbon or charcoal. The gas generating composition may include 40 to 58% by weight of ammonium perchlorate, 30 to 43% by weight of the chlorine scavenger, and 1 to 30% by weight of the microcrystalline carbon powder.
Claims13
A gas generating composition generating a gas containing nitrogen gas, carbon dioxide gas and water vapor when burned and adapted to use with an aluminum container for accommodating the gas generating composition, the gas generating composition comprising:
- (a) ammonium perchlorate which generates a chlorine-containing chemical species when burned, where the ammonium perchlorate is present at a weight percent greater than any other component;
- (b) a chlorine scavenger for trapping the chlorine-containing chemical species;
- and
- (c) a microcrystalline carbon powder fuel having a specific surface area in the range of 50 to 1300 m2/g and compounded at an amount adapted to lower self-ignition temperature of the gas generating composition, the microcrystalline carbon powder fuel being selected from the group consisting of activated carbon or charcoal.
A gas generator for air bag, comprising:
- a gas generating composition generating a gas containing nitrogen gas, carbon dioxide gas, and water vapor when burned, wherein the gas generating composition contains (a) ammonium perchlorate present in a weight percent greater than any other component, which generates a chlorine-containing chemical species when burned, (b) a chlorine scavenger for trapping the chlorine-containing chemical species, and (c) a microcrystalline carbon powder fuel having a specific surface area in the range of 50 to 1300 m2/g and compounded at an amount adapted to lower self-ignition temperature of the gas generating composition, the microcrystalline carbon powder fuel being selected from the group consisting of activated carbon and charcoal;
- and
- a container made of aluminum for accommodating the gas generating composition.
A gas generator for pretensioner, comprising:
- a gas generating composition generating a gas containing nitrogen gas, carbon dioxide gas, and water vapor when burned, wherein the gas generating composition contains (a) ammonium perchlorate present in a weight percent greater than any other component, which generates a chlorine-containing chemical species when burned, (b) a chlorine scavenger for trapping the chlorine-containing chemical species, and (c) a microcrystalline carbon powder fuel having a specific surface area in the range of 50 to 1300 m2/g and compounded at an amount adapted to lower self-ignition temperature of the gas generating composition, the microcrystalline carbon powder fuel being selected from the group consisting of activated carbon and charcoal;
- and
- a container made of aluminum for accommodating the gas generating composition.
Dependencies are inferred from the claim text.