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Composition for controlling oxides of nitrogen

  • US 5,139,588 A
  • Filed: 04/15/1991
  • Issued: 08/18/1992
  • Est. Priority Date: 10/23/1990
  • Status: Expired due to Term
First Claim
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1. A pyrotechnic, gas generating mixture useful under combustion for inflating an automobile or aircraft safety crash bag, said pyrotechnic mixture comprising at least one material of each of the following functional groups of materials:

  • a. A fuel selected from the group of azole compounds consisting of triazole, aminotetrazole, tetrazole, bitetrazole, and metal salts of these compounds,b. An oxygen containing oxidizer compound selected from the group consisting of alkaline earth metal nitrates and perchlorates, and alkali metal nitrates and perchlorates,c. A chemical additive that is an alkali metal salt of an inorganic acid or organic acid selected from the group consisting of carbonate, triazole, tetrazole, 5-aminotetrazole, bitetrazole, and 3-nitro-1,2,4-triazole-5-one, said chemical additive being present in said mixture in an amount sufficient to reduce the amount of toxic oxides of nitrogen from the combustion products produced by the mixture under combustion, andd. A low-temperature slag forming material selected from the group consisting of naturally occurring clays and talcs and silica,with the proviso that said gas generating mixture lacks a high temperature slag forming material selected from the group consisting of alkaline earth metal oxides, hydroxides, carbonates, and oxalates,and with the further proviso that where the low temperature slag forming material comprises clay or silica, the pyrotechnic mixture does not in weight % contain the following;

    [K5 AT 2 to 30 5 AT 8 to 40 Clay 2 to 10 Sr(NO3)2 40 to
    
    
    space="preserve" listing-type="tabular">______________________________________ 5-aminotetrazole about 22 to about 36 Clay or SiO.sub.2 about 2 to about 18 Sr(NO3)2 about 38 to about 62 or 5-aminotetrazole about 22 to aobut 36 Sr(NO3)2 about 8 to about 62 NaNO3 0 to about 42 SiO2 about 2 to about 18 or 1,2,4-triazole-5-one about 20 to about 34 Sr(NO3)2 about 40 to about 78 SiO2 about 2 to about 20. ______________________________________

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