Autoignition composition

Explosive and thermic compositions or charges – Metal or alloy or metalloid – each in particulate form – with... – With nitrated organic compound

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Details

149 36, 149 37, 149 45, C06B 3308, C06B 3300

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active

059592427

ABSTRACT:
The present invention relates to an autoignition composition for safely initiating combustion of a main pyrotechnic charge in a gas generator or pyrotechnic device exposed to flame or a high temperature environment. The autoignition compositions of the invention include a mixture of an oxidizer composition and a powdered metal, wherein the oxidizer composition includes at least one of an alkali metal or an alkaline earth metal nitrate, a complex salt nitrate, such as Ce(NH.sub.4).sub.2 (NO.sub.3).sub.6 or ZrO(NO.sub.3).sub.2, a dried, hydrated nitrate, such as Ca(NO.sub.3).sub.2.4H.sub.2 O or Cu(NO.sub.3).sub.2.2.5 H.sub.2 O, silver nitrate, an alkali or alkaline earth chlorate, an alkali or alkaline earth metal perchlorate, ammonium perchlorate, a nitrite of sodium, potassium, or silver, or a solid organic nitrate, nitrite, or amine, such as guanidine nitrate, nitroguanidine and 5-aminotetrazole, respectively. The present invention also relates to a method for initiating a gas generator or pyrotechnic composition in a gas generator or pyrotechnic device exposed to flame or a high temperature environment. In the method of the invention, the gas generator or pyrotechnic composition is placed in thermal contact with an autoignition composition of the invention.

REFERENCES:
patent: 3609115 (1971-09-01), Sammons
patent: 3890174 (1975-06-01), Helms et al.
patent: 5429691 (1995-07-01), Hinshaw et al.
patent: 5439537 (1995-08-01), Hinshaw et al.
patent: 5482579 (1996-01-01), Ochi et al.
patent: 5538567 (1996-07-01), Henry et al.
patent: 5542688 (1996-08-01), Scheffee

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