Pyrotechnic compositions generating non-toxic gases based on ammonium perchlorate

  • US 6,533,878 B1
  • Filed: 05/09/2000
  • Issued: 03/18/2003
  • Est. Priority Date: 12/12/1997
  • Status: Expired due to Term
First Claim
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1. A pyrotechnic gas-generating composition comprising:

  • a) a crosslinked reducing binder representing at most 10% of the total weight of the composition chosen from the group consisting of crosslinkable reducing binders based on silicone resin, based on epoxy resin and based on polyacrylic rubbers having reactive terminal groups;

    b) a main oxidizing filler representing between 50% and 75% of the total weight of the composition and comprising at least a mixture of ammonium perchlorate and a chlorine scavenger chosen from the group consisting of sodium nitrate, lithium carbonate and potassium carbonate, the ammonium perchlorate/chlorine scavenger weight ratio being less than 5.0; and

    c) additives comprising at least one copper compound and at least one organic,nitrogen compound, wherein the at least one copper compound is chosen from the group consisting of cupric oxide CuO representing between 5% and 16% of the total weight of the composition and basic copper nitrate Cu(NO3)2 3Cu(OH)2 representing approximately 10% of the total weight of the composition and wherein the at least one organic nitrogen compound is chosen from the group consisting of nitro-guanidine, guanidine nitrate, oxamide, dicyandiamide and metal cyanamides representing between 5% and 15% of the total weight of the composition.

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