Treatment of airbag inflation gases
AssigneeAutoliv ASP, Inc.
InventorsRobert D. Taylor, Michael W. Barnes, Ivan V. Mendenhall
Life of this patent
Estimating the term…
Abstract
Chemical coolant formulations for treating the hot gas formed by an airbag inflator and corresponding methods of inflating an airbag cushion are provided. The chemical coolant formulations include a first ingredient which, when contacted by the hot gas, endothermically decomposes to form a cooling gas and a solid slag component and a second ingredient which, when contacted by the hot gas, forms a liquid slag component. The solid and liquid slag components cooperate to form a unified slag mass.
Claims21
A chemical coolant formulation for treating the hot gas formed by an airbag inflator, said chemical coolant formulation comprising:
- a first coolant ingredient which, when contacted by the hot gas, endothermically decomposes to form a cooling gas and t solid slag component,
- a second coolant ingredient which, when contacted by the hot gas, forms a liquid slag component,
- wherein the solid and liquid slag components cooperate to form a unified slag mass and
- a binder effective to render the formulation extrudable, wherein said binder is a water compatible compound.
A chemical coolant formulation for treating the hot gas formed by an airbag inflator, said chemical coolant formulation comprising:
- a first coolant ingredient which, when contacted by the hot gas, endothermically decomposes to form a cooling gas and a solid slag component,
- a second coolant ingredient which, when contacted by the hot gas, forms a liquid slag component,
- wherein the solid and liquid slag components cooperate to form a unified slag mass and
- a binder effective to render the formulation extrudable, wherein said binder is selected from the group consisting of:
- ethyl cellulose, carboxymethyl cellulose, cellulose acetate butyrate, cellulose acetate and other substituted cellulose derivatives.
A method for forming a chemical coolant, said method comprising:
- extrusion processing of a coolant formulation including:
- a first coolant ingredient which, when contacted by the hot gas, endothermically decomposes to form a cooling gas and a solid slag component,
- a second coolant ingredient which, when contacted by the hot gas, forms a liquid slag component, and
- a binder effective to render the formulation extrudable,
- wherein the solid and liquid slag components cooperate to form a unified slag mass.
An extruded chemical coolant formulation for treating the hot gas formed by an airbag inflator, said extruded chemical coolant formulation comprising:
- a first coolant ingredient which, when contacted by the hot gas, endothermically decomposes to form a cooling gas and a solid slag component,
- a second coolant ingredient which, when contacted by the hot gas, forms a liquid slag component, and
- a binder effective to render the formulation extrudable,
- wherein the solid and liquid slag components cooperate to form a unified slag mass.
A method for forming a chemical coolant, said method comprising:
- tableting processing of a coolant formulation including:
- a first coolant ingredient which, when contacted by the hot gas, endothermically decomposes to form a cooling gas and a solid slag component,
- a second coolant ingredient which, when contacted by the hot gas, forms a liquid slag component, and
- a release aid effective to permit the release of the tableted material from a corresponding tablet forming device, the release aid present in a relative amount of about 0.5 weight percent to about 2 weight percent,
- wherein the solid and liquid slag components cooperate to form a unified slag mass.
A tableted chemical coolant material for treating the hot gas formed by an airbag inflator, said tableted chemical coolant material comprising
- a first coolant ingredient which, when contacted by the hot gas, endothermically decomposes to form a cooling gas and a solid slat component, said first coolant ingredient present in a relative amount of about 63 weight percent to about 98.5 weight percent,
- a second coolant ingredient which when contacted by the hot gas, forms a liquid slat component, and wherein the solid and liquid slag components cooperate to form a unified slag mass, said second cooling ingredient present in a relative amount of about 1 weight percent to about 25 weight percent, and
- a release aid effective to permit the release of the tableted material from a corresponding tablet forming device, said release aid present in a relative amount of about 0.5 weight percent to about 2 weight percent.
A tableted chemical coolant material for treating the hot gas formed by an airbag inflator, said tableted chemical coolant material comprising:
- a first coolant ingredient which, when contacted by the hot gas, endothermically decomposes to form a cooling gas and a solid slag component, said first coolant ingredient present in a relative amount of about 63 weight percent to about 98.5 weight percent,
- a second coolant ingredient which, when contacted by the hot gas, forms a liquid slag component, and wherein the solid and liquid slag components cooperate to form a unified slag mass, said second cooling ingredient present in a relative amount of about 1 weight percent to about 25 weight percent, and
- a release aid effective to permit the release of the tableted material from a corresponding tablet forming device, said release aid present in a relative amount of about 0.5 weight percent to about 2 weight percent, wherein said release aid is a combination of calcium stearate and mica.
Dependencies are inferred from the claim text.