For the purpose of preventing possible harmful gases caused by the deflagration of gas generating agents of airbag inflators, various additives were tested. The additives chosen were one of those classified into four categories: 1) organic compounds which thermally decompose to form NH2 radicals, i.e. urea, azodicarbonamide (ADCA), guanidine carbonate (GC) and aminoguanidine bicarbonate (AGBC); 2) organic compounds which thermally decompose to form HNCO, i.e. cyanuric acid; 3) metal particles, i.e. Ag, Cu and Fe; and 4) metal oxide particles, i.e. CuO. Quantitative analyses of product gases were conducted after deflagration inside a closed bomb and 60 l tank. As the result of the addition of organic compounds to guanidine salt of 1,5'-bi-1H-tetrazole (15BG) / KClO4 stoichiometric ratio mixture (37.5 wt-% / 62.5 wt-%) in a closed bomb test, around 80 % reduction of (NO + NO2) and over 95 % reduction of Cl2 have been achieved when 5 wt-% of urea or guanidine carbonate was added, although there was generally an increase in CO concentration. Up to 50 % reduction of (NO + NO2) and almost 100 % reduction of CO have been achieved when 2 - 10 wt-% CuO was added. Addition of Cu and Fe particles resulted instead in the increase in (NO + NO2) and CO concentration, but up to 67 % reduction of (NO + NO2) and almost 100 % reduction of CO have been achieved when 5 wt-%Ag was added. In a 60l tank test, addition of 5 wt-% urea resulted in 67.5 % reduction of (NO + NO2), 50 % reduction of HCN and almost 100 % reduction of HCl, together with a temperature drop of approximately 100 K inside the tank, when the amount of tricinate pellet, used for ignition, was 60 mg. Addition of 5wt-% urea, cyanuric acid, GC, Ag or CuO also resulted in reduction in (NO + NO2) concentration and temperature inside the tank, with urea and GC displaying high reduction percentage, when the amount of tricinate pellet was 40 mg.


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    Titel :

    Additives for reduction of possible harmful gases from gas generating agents


    Weitere Titelangaben:

    Ausstoßreduktion von potentiell schädlichen Gasen aus gasbildenden Stoffen in Airbags durch Zusatzmittel


    Beteiligte:
    Date, S. (Autor:in) / Miyata, Y. (Autor:in) / Kazumi, T. (Autor:in) / Hasue, K. (Autor:in)


    Erscheinungsdatum :

    2003


    Format / Umfang :

    14 Seiten, 8 Bilder, 3 Tabellen, 18 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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