Gas generating compositions
First Claim
Patent Images
1. A gas generating composition, which is installed in a vehicle occupant restraint system and generates gas by a combustion reaction when the vehicle occupant restraint system is actuated, wherein the gas generating composition essentially consists of:
- ammonium nitrate as an oxidant; and
microcrystalline activated carbon as an reductant, wherein the microcrystalline activated carbon has a specific surface area of 700 to 1600 m2/g, wherein the weight ratio of the ammonium nitrate to the microcrystalline activated carbon is between 95;
5 and 99;
1, wherein the gas generating composition has a predetermined size and shape, the shape being one of a cylinder, a tube, a lobed tube having a plurality of through holes, and a polygonal prism having a plurality of through holes.
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Accused Products
Abstract
A gas generating composition for generating gas by a combustion reaction to inflate, for example, an airbag. The gas generating composition includes an oxidant and crystalline carbon powder that reacts with the oxidant. The oxidant is preferably ammonium nitrate. The crystalline carbon powder is preferably activated carbon powder. The gas generating composition preferably includes a high energy substance, binder and plasticizer.
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Citations
15 Claims
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1. A gas generating composition, which is installed in a vehicle occupant restraint system and generates gas by a combustion reaction when the vehicle occupant restraint system is actuated, wherein the gas generating composition essentially consists of:
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ammonium nitrate as an oxidant; and
microcrystalline activated carbon as an reductant, wherein the microcrystalline activated carbon has a specific surface area of 700 to 1600 m2/g, wherein the weight ratio of the ammonium nitrate to the microcrystalline activated carbon is between 95;
5 and 99;
1, wherein the gas generating composition has a predetermined size and shape, the shape being one of a cylinder, a tube, a lobed tube having a plurality of through holes, and a polygonal prism having a plurality of through holes.- View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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2. A gas generating composition, which is installed in a vehicle occupant restraint system and generates gas by a combustion reaction when the vehicle occupant restraint system is actuated, wherein the gas generating composition essentially consists of:
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ammonium nitrate as an oxidant;
microcrystalline activated carbon as an reductant, wherein the microcrystalline activated carbon has a specific surface area of 700 to 1600 m2/g, wherein the weight ratio of the ammonium nitrate to the microcrystalline activated carbon is between 94;
6 and 99;
1; and
high energy substance selected from the group consisting of RDX, HMX, PETN, HN and a mixture thereof, wherein the content of the high energy substance is in a range of 0.6 to 16 wt % of the gas generating composition, and wherein the gas generating composition has a predetermined size and shape, the shape being one of a cylinder, a tube, a lobed tube having a plurality of through holes, and a polygonal prism having a plurality of through holes.
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3. A gas generating composition, which is installed in a vehicle occupant restraint system and generates gas by a combustion reaction when the vehicle occupant restraint system is actuated, wherein the gas generating composition essentially consists of:
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ammonium nitrate as an oxidant;
microcrystalline activated carbon as an reductant, wherein the microcrystalline activated carbon has a specific surface area of 700 to 1600 m2/g, wherein the weight ratio of the ammonium nitrate to the microcrystalline activated carbon is between 94;
6 and 99;
1 and the total weight of the ammonium nitrate and the microcrystalline activated carbon is in 73.5-99.5% of the gas generating compound; and
a binder selected from the group consisting of cellulose acetate, polyvinyl alcohol, glycidylazide polymer and a mixture thereof, wherein the gas generating composition has a predetermined size and shape, the shape being one of a cylinder, a tube, a lobed tube having a plurality of through holes, and a polygonal prism having a plurality of through holes.
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4. A gas generating composition, which is installed in a vehicle occupant restraint system and generates gas by a combustion reaction system and generates gas by a combustion reaction when the vehicle occupant restraint system is actuated, wherein the gas generating composition essentially consists of:
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ammonium nitrate as an oxidant;
microcrystalline activated carbon as an reductant, wherein the microcrystalline activated carbon has a specific surface area of 700 to 1600 m2/g, wherein the weight ratio of the ammonium nitrate to the microcrystalline activated carbon is between 94;
6 and 99;
1 and the total weight of the ammonium nitrate and the microcrystalline activated carbon is in 73.5-99.5% of the gas generating compound;
nitrocellulose; and
a stabilizer for impeding decomposition of the nitrocellulose, wherein the stabilizer is in 0.5-1.0% of the gas generating compound, wherein the gas generating composition has a predetermined size and shape, the shape being one of a cylinder, a tube, a lobed tube having a plurality of through holes, and a polygonal prism having a plurality of through holes.
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5. A gas generating composition, which is installed in a vehicle occupant restraint system and generates gas by a combustion reaction when the vehicle occupant restraint system is actuated, wherein the gas generating composition essentially consists of:
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ammonium nitrate as an oxidant;
microcrystalline activated carbon as an reductant, wherein the microcrystalline activated carbon has a specific surface area of 700 to 1600 m2/g, wherein the weight ratio of the ammonium nitrate to the microcrystalline activated carbon is between 94;
6 and 99;
1;
high energy substance selected from the group consisting of RDX, HMX, PETN, TAGN, HN and a mixture thereof, wherein the content of the high energy substance is in a range of 1.3 to 2.5 wt % of the gas generating composition; and
a binder selected from the group consisting of cellulose acetate, polyvinyl alcohol, glycidylazide polymer and a mixture thereof, wherein the content of the binder is in a range of 4.0 to 22.5 wt % of the gas generating composition, wherein the gas generating composition has a predetermined size and shape, the shape being one of a cylinder, a tube, a lobed tube having a plurality of through holes, and a polygonal prism having a plurality of through holes.
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6. A gas generating composition, which is installed in a vehicle occupant restraint system and generates gas by a combustion reaction when the vehicle occupant restraint system is actuated, wherein the gas generating composition essentially consists of:
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ammonium nitrate as an oxidant;
microcrystalline activated carbon as an reductant, wherein the microcrystalline activated carbon has a specific surface area of 700 to 1600 m2/g, wherein the weight ratio of the ammonium nitrate to the microcrystalline activated carbon is between 94;
6 an 99;
1;
high energy substance selected from the group consisting of RDX, HMX, PETN, TAGN, HN and a mixture thereof, wherein the content of the high energy substance is in a range of 1.3 to 2.5 wt % of the gas generating composition;
nitrocellulose; and
a stabilizer for impeding decomposition of the nitrocellulose, wherein the stabilizer is in 0.5-1.0% of the gas generating compound, wherein the gas generating composition has a predetermined size and shape, the shape being one of a cylinder, a tube, a lobed tube having a plurality of through holes, and a polygonal prism having a plurality of through holes.
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7. A gas generating composition, which is installed in a vehicle occupant restraint system and generates gas by a combustion reaction when the vehicle occupant restraint system is actuated, wherein the gas generating composition essentially consists of:
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ammonium nitrate as an oxidant;
microcrystalline activated carbon as an reductant, wherein the microcrystalline activated carbon has a specific surface area of 700 to 1600 m2/g, wherein the weight ratio of the ammonium nitrate to the microcrystalline activated carbon is between 94;
6 and 99;
1 and the total weight of the ammonium nitrate and the microcrystalline activated carbon is in 83-87% of the gas generating compound;
high energy substance selected from the group consisting of RDX, HMX, PETN, TAGN, HN and a mixture thereof, wherein the content of the high energy substance is in a range of 1.0 to 2.0 wt % of the gas generating composition; and
a binder selected from the group consisting of cellulose acetate, polyvinyl alcohol, glycidylazide polymer and a mixture thereof; and
a plasticizer to increase plasticity of the gas generating composition, wherein the gas generating composition has a predetermined size and shape, the shape being one of cylinder, a tube, a lobed tube having a plurality of through holes, and a polygonal prism having a plurality of through holes.
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8. A gas generating composition, which is installed in a vehicle occupant restraint system and generates gas by a combustion reaction when the vehicle occupant restraint system is actuated, wherein the gas generating composition essentially consists of:
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ammonium nitrate as an oxidant;
microcrystalline activated carbon as an reductant, wherein the microcrystalline activated carbon has a specific surface area of 700 to 1600 m2/g, wherein the weight ratio of the ammonium nitrate to the microcrystalline activated carbon is between 94;
6 and 99;
1;
high energy substance selected from the group consisting of RDX, HMX, PETN, TAGN, HN and a mixture thereof, wherein the content of the high energy substance is in a range of 1.0 to 2.0 wt % of the gas generating composition;
nitrocellulose;
a stabilizer for impeding decomposition of the nitrocellulose; and
a plasticizer to increase plasticity of the gas generating composition, wherein the gas generating composition has a predetermined size and shape, the shape being one of a cylinder, a tube, a lobed tube having a plurality of through holes, and a polygonal prism having a plurality of through holes.
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Specification