Priming charge with annular percussion and process for its manufacture
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United States of America Patent
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Oct 11, 1994
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N/A
app pub date -
Jul 19, 1993
filing date -
Jul 20, 1992
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Abstract
The present invention relates to a priming charge with annular percussion, free from any toxic metal, which corresponds to the following weight composition: 40 to 70% of a dinitrobenzofuroxan salt as impact-sensitive primary explosive, 3 to 15% of tetrazene as sensitizing explosive, 10 to 30% of cupric oxide as oxidizing agent, 5 to 25% of a pulverulent reducing agent, 0.5 to 20% of an inert abrasive powder and 0 to 5% of a binder. It also relates to a process for its manufacture, wherein the following successive stages are carried out: the cupric oxide and the pulverulent reducing agent and the inert abrasive powder are mixed dry; the dinitrobenzofuroxan salt and the tetrazene are then added to this mixture thus formed, and the mixture thus obtained is homogenized. If appropriate, a solution of binder, for example in the form of an aqueous solution of gum arabic, is added to the inert mixture.
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