Additive approach to ballistic and slag melting point control of

Details Additive approach to ballistic and slag melting point control of Additive approach to ballistic and slag melting point control of

1991-08-23

1992-09-01

Lechert, Jr., Stephen J.

Explosive and thermic compositions or charges

Containing inorganic metal azide

149 61, C06B 3500

Patent

active

051435675

ABSTRACT:
Gas generant pyrotechnic compositions especially suitable for inflating vehicle occupant restraint systems with nitrogen gas are described. The compositions are comprised (in wt. %) of about 65-74% of an azide, preferably sodium azide; about 17-25% of iron oxide, preferably ferric oxide; and about 3.5-6% metal nitrite or nitrate co-oxidizer, preferably sodium nitrate; to which base composition is added about 2.5-8% silica, alumina, titania or mixtures thereof, up to 6% bentonite and up to 4% molybdenum disulfide. Preferred driver and passenger side formulations are disclosed.
The compositions burn from about 1.0 to 1.5 inches per second, have excellent slag and clinker properties, as well as excellent aging and mechanical strength characteristics when formed into cylindrical pellets or wafers.
The formulation ingredients are amenable to water slurry mixing, spray drying and machine pressing into cylindrical pellets or wafers for insertion into a suitable gas generating device.

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