Gas generating composition

Abstract

The invention provides a gas generating composition having a good ignition property and combustibility and generating suppressed amounts of toxic gases such as NOx and ammonia at the time of combustion. The gas generating composition comprises (A) a nitrogen-containing compound as fuel, (B) a basic metal nitrate and (C) a chloric acid compound as oxidizing agents, the chloric acid compound (C) is (C-1) a perchloric acid salt and/or (C-2) a chloric acid salt and the content of the component (C) is less than 5% by mass in the total oxidizing agents.

1 . A gas generating composition comprising (A) a nitrogen-containing compound as fuel and (B) a basic metal nitrate and (C) a chloric acid compound as oxidizing agents, the chloric acid compound (C) being at least one selected from group consisting of (C-1) a perchloric acid salt and (C-2) a chloric acid salt, and the content of the component (C) being less than 5% by mass in the total oxidizing agents.  
     
     
         2 . The gas generating composition as claimed in  claim 1 , wherein the component (B) is a basic copper nitrate and the perchloric acid salt (C-1) is sodium perchlorate or potassium perchlorate and the chloric acid salt (C-2) is sodium chlorate or potassium chlorate.  
     
     
         3 . The gas generating composition as claimed in  claim 1  or  2 , wherein the average particle diameter of the chloric acid compound (C) is 1 to 500 μm.  
     
     
         4 . The gas generating composition as claimed in  claim 1 , further comprising (D) a metal hydroxide, a hydrate of a metal oxide or a combination thereof.  
     
     
         5 . The gas generating composition as claimed in  claim 4 , wherein the metal hydroxide (D) is magnesium hydroxide.  
     
     
         6 . The gas generating composition as claimed in  claim 1  or  2 , having an oxygen balance in the range of −0.02 g/g to +0.02 g/g.