USA As Represented by Secretary of the Navy

James E Rose

Jan Puszynski

Gerald L MacKenzie

Douglas J Elstrodt

Magdy Michay

Robert O Petri

A novel pyrotechnic delay composition for use in metal delay fuse cartridges, including as its primary constituent Si&#x2014;Al&#x2014;FeOprepared from powdered form. The delay composition yields a progressive burning zone and burns substantially gas-free, is safe to handle, is resistant to moisture and degradation over time, can be incorporated within the confines of existing detonator shells, and poses no environmental hazards.

Non-toxic pyrotechnic delay compositions

The present invention is a lead-free pyrotechnic composition comprising from about 60 percent by weight to about 80 percent by weight iodine pentoxide and from about 15 percent by weight to about 35 percent by weight of a solid-powder fuel. The solid-powder fuel may normally be selected from aluminum, magnesium, or a combination thereof. Depending upon the potential use for the lead-free pyrotechnic composition of the present invention, the composition may also include from about 4 to 10 percent by weight of a stabilizer that neutralizes any iodic acid formed by the iodine pentoxide, from about 3 to 5 percent by weight of a binder, or from about 5 to 15 percent by weight of a coloring agent. In a preferred embodiment of the invention, the aluminum will comprise aluminum flake having a size ranging from about nanometers to about 100 nanometers.

Lead-free pyrotechnic composition

An igniter composition for a gas generator comprises a stoichiometric comation of pyrotechnic metal selected from the group consisting of beryllium, boron, lithium, sodium, titanium, magnesium, aluminum and alloys and mixtures thereof and one or more halogenated polymers; and fumed colloidal silica in an amount from about 0.5 to about 2.5 percent of the total composition weight.

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Bryans Road, MD, United States of America

James E Rose