Gas generating composition

Abstract

A gas generating composition which is excellent in a combustion efficiency and a gas output and in which amounts of residues generated are reduced in the combustion is obtained. A gas generating composition comprising (a) 5 to 40% by weight of at least one high polymer selected from the group consisting of a polyacrylic derivative resin, a polyacetal, a urea resin, a melamine resin, a ketone resin and a cellulose-based high polymer, and (b) 60 to 95% by weight of ammonium nitrate or phase-stabilized ammonium nitrate. It is suitable as a gas generating agent for an air bag of automobiles.

What is claimed:  
     
         1 . A gas generating composition comprising 
 (a) 5 to 40 weight-% of a polymer selected from the group consisting of a polyacetal resin, a urea resin, a melamine resin, a ketone resin, and a cellulose-based high polymer and    (b) 95 to 60 weight-% of ammonium nitrate or phase-stabilized ammonium nitrate.    
     
     
         2 . The gas generating composition of  claim 1 , further comprising (c) a bitetrazole salt compound.  
     
     
         3 . The gas generating composition of  claim 1 , further comprising (d) carbon or a metallic powder as a burning rate controlling agent.  
     
     
         4 . The gas generating composition of  claim 1 , further comprising (e) a metal oxide as a combustion catalyst.  
     
     
         5 . The gas generating composition of  claim 1 , which is a molded article.