Gas generant and manufacturing method thereof
First Claim
1. A method of forming a gas generating composition comprising the steps of:
- providing a solvent effective to dissolve a fuel comprising a polymeric azole selected from the group consisting of vinyl tetrazoles, vinyl triazoles and vinyl furazans, the solvent selected with regard to the solvability of the functional group(s) that may be present on the polymeric azole, the solvent placed in a mixing vessel;
adding the fuel to the mixing vessel;
adding an oxidizer to the mixing vessel;
stirring the mixture;
adding an initiator to the mixing vessel to initiate polymerization of the slurry; and
curing the mixture.
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Accused Products
Abstract
The present invention generally relates to gas generant compositions for inflators of occupant restraint systems, for example. An extrudable pyrotechnic composition includes polyvinylazoles for use within an airbag gas generator. The fuel may be selected from exemplary polyvinylazoles including 5-amino-1-vinyltetrazole, poly(5-vinyltetrazole), poly(2-methyl-5-vinyl) tetrazole, poly(1-vinyl) tetrazole, poly(3-vinyl) 1,2,5 oxadiazole, and poly(3-vinyl) 1,2,4-triazole. An oxidizer is combined with the fuel and preferably contains phase stabilized ammonium nitrate. A novel method of forming the compositions is also presented wherein the various constituents are wetted and/or dissolved, and then cured within the polyvinylazole matrix thereby forming a more intimate combination within the gas generant composition. A vehicle occupant protection system 180, and other gas generating systems, incorporate the compositions of the present invention.
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Citations
11 Claims
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1. A method of forming a gas generating composition comprising the steps of:
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providing a solvent effective to dissolve a fuel comprising a polymeric azole selected from the group consisting of vinyl tetrazoles, vinyl triazoles and vinyl furazans, the solvent selected with regard to the solvability of the functional group(s) that may be present on the polymeric azole, the solvent placed in a mixing vessel;
adding the fuel to the mixing vessel;
adding an oxidizer to the mixing vessel;
stirring the mixture;
adding an initiator to the mixing vessel to initiate polymerization of the slurry; and
curing the mixture. - View Dependent Claims (2, 3, 4, 5)
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6. A gas generating system containing a gas generant formed by the method comprising the steps of:
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providing a solvent effective to dissolve a fuel comprising a polymeric azole selected from the group consisting of vinyl tetrazoles, vinyl triazoles and vinyl furazans, the solvent selected with regard to the solvability of the functional group(s) that may be present on the polymeric azole, the solvent placed in a mixing vessel;
adding the fuel to the mixing vessel;
adding an oxidizer to the mixing vessel;
stirring the mixture;
adding an initiator to the mixing vessel to initiate polymerization of the slurry; and
curing the mixture. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification