Air bag assemblies with foamed energetic igniters
First Claim
Patent Images
1. An air bag assembly comprising:
- an inflatable air bag;
a solid gas generant for inflating the inflatable air bag; and
an igniter disposed in operative relation with the solid gas generant for activating the solid gas generant, the igniter comprising a foamed material formed from a composition comprising;
at least one polyfunctional isocyanate;
at least one curable binder having a plurality of functional groups which are reactive with the polyfunctional isocyanate;
at least one fuel source;
at least one oxidizer; and
at least one foaming agent for imparting porosity to the foamed material.
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Abstract
An air bag igniter including a foamed material, and an air bag assembly containing the same are disclosed. The foamed material is formed from a composition including, as ingredients, a polyfunctional isocyanate, a polymeric binder having a plurality of hydroxyl groups which are reactive with the polyfunctional isocyanate, a fuel source, an oxidizer, and a foaming agent which may or may not be retained in the foamed material.
42 Citations
18 Claims
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1. An air bag assembly comprising:
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an inflatable air bag;
a solid gas generant for inflating the inflatable air bag; and
an igniter disposed in operative relation with the solid gas generant for activating the solid gas generant, the igniter comprising a foamed material formed from a composition comprising;
at least one polyfunctional isocyanate;
at least one curable binder having a plurality of functional groups which are reactive with the polyfunctional isocyanate;
at least one fuel source;
at least one oxidizer; and
at least one foaming agent for imparting porosity to the foamed material.
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2. An air bag assembly comprising:
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an inflatable air bag;
a solid gas generant for inflating the inflatable air bag; and
an igniter disposed in operative relation with the solid gas generant for activating the solid gas generant, the igniter comprising a foamed material formed from a composition comprising;
at least one polyfunctional isocyanate;
at least one non-energetic curable binder having a plurality of functional groups which are reactive with the polyfunctional isocyanate;
at least one fuel source;
at least one oxidizer; and
at least one foaming agent for imparting porosity to the foamed material. - View Dependent Claims (3, 4, 5, 6, 7)
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8. An air bag assembly comprising:
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an inflatable air bag;
a solid gas generant for inflating the inflatable air bag; and
an igniter disposed in operative relation with the solid gas generant for activating the solid gas generant, the igniter comprising a foamed material formed from a composition comprising;
at least one polyfunctional isocyanate;
at least one energetic curable binder having a plurality of functional groups which are reactive with the polyfunctional isocyanate;
at least one fuel source other than the energetic binder;
at least one oxidizer; and
at least one foaming agent for imparting porosity to the foamed material and is optionally retained in the foamed material. - View Dependent Claims (9, 10, 11, 12, 13)
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14. An air bag assembly comprising:
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an inflatable air bag;
a solid gas generant for inflating the inflatable air bag; and
an igniter disposed in operative relation with the solid gas generant for activating the solid gas generant, the igniter comprising a foamed material formed from a composition comprising;
at least one polyfunctional isocyanate;
at least one energetic curable binder having a plurality of hydroxyl groups which are reactive with the polyfunctional isocyanate;
at least one oxidizer; and
at least one foaming agent for imparting porosity to the foamed material and is optionally retained in the foamed material, wherein the composition is free of any fuel. - View Dependent Claims (15, 16, 17, 18)
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Specification