Gas generative compositions

Details Gas generative compositions Gas generative compositions

C - Chemistry, Metallurgy

06

B

C06B 31/00 (2006.01) C06B 25/34 (2006.01) C06B 33/00 (2006.01) C06B 45/10 (2006.01) C06D 5/06 (2006.01)

Patent

CA 2389001

Gas generative compositions especially useful in inflators for protective passive restraint devices (e.g., motor vehicle air bags, escape slide chutes, life rafts, and the like) include a nitrogen-containing fuel and an oxidizer selected from copper (II) oxide (CuO), cupric nitrate, basic copper nitrate (Cu(NO3)2.3Cu(OH)2), strontium nitrate (Sr(NO3)2) and mixtures thereof. Most preferably the nitrogen-containing fuel is azodicarbonamidine dinitrate (AZODN) and/or 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (CL- 20). The compositions of the present invention provide high burning rates with acceptable burning rate pressure exponents which allow their operation at lower pressures, thereby resulting in the use of less costly, lower weight, and lower strength materials for design and manufacture of the inflator pressure vessel.

Compositions génératrices de gaz qui sont particulièrement utiles dans des gonfleurs pour des dispositifs de retenue protecteurs passifs (par ex. airbags, toboggans d'évacuation, canots de sauvetage et analogues) et qui comportent un combustible contenant de l'azote et un oxydant choisi parmi l'oxyde cuivrique (CuO), le nitrate de cuivre, le nitrate de cuivre basique (Cu(NO¿3?)¿2?.3Cu(OH)¿2?), le nitrate de strontium (Sr(NO¿3?)¿2?) et des mélanges desdites substances. De préférence, le combustible contenant de l'azote est du dinitrate d'azodicarbonamidine (AZODN) et/ou 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (CL-20). Les compositions selon la présente invention offrent des vitesses de combustion élevées avec une augmentation exponentielle acceptable de la pression en fonction de la vitesse de combustion, ce qui permet leur utilisation à des pressions plus faibles et, partant, l'utilisation de matières moins chères, plus légères et moins résistantes pour la conception et la fabrication pour la poche soumise à la pression de gonflage.

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