Gas generating composition

Abstract

A gas generating composition having a low combustion temperature and a low heat of combustion at the time of burning and therefore enabling downsizing of gas generators themselves, which comprises as the essential components nitroguanidine and an oxidizing agent comprising (a) nitrates or nitrites of alkali metals or alkaline earth metals, (b) oxides or multiple oxides of metals selected from among copper, cobalt, iron, manganese, nickel, zinc, molybdenum and bismuth, or a mixture of the components (a) and (b).

Claims:  
     
         1 . A gas generating composition characterized by comprising as the essential components nitroguanidine and an oxidizing agent comprising the following component (a) or (b) or a mixture of the components (a) and (b): 
 (a) nitrates or nitrites of alkali metals or alkaline earth metals, and    (b) oxides or multiple oxides of metals selected from copper, cobalt, iron, manganese, nickel, zinc, molybdenum and bismuth.    
     
     
         2 . The composition according to    claim 1   , which comprises nitroguanidine and the component (b).  
     
     
         3 . The composition according to    claim 1   , which comprises nitroguanidine and the components (a) and (b).  
     
     
         4 . The composition according to    claim 1   , which comprises 20 to 80% by weight of nitroguanidine and 80 to 20% by weight of the oxidizing agent.  
     
     
         5 . The composition according to    claim 1   , which comprises 25 to 40% by weight of nitroguanidine and 75 to 60% by weight of the oxidizing agent.  
     
     
         6 . The composition according to    claim 1   , which further contains a binder in an amount of 5% by weight or below based on the total amount of the composition.  
     
     
         7 . The composition according to    claim 1   , wherein the component (a) is an alkaline earth metal nitrate.  
     
     
         8 . The composition according to    claim 1   , wherein the component (a) is strontium nitrate.  
     
     
         9 . The composition according to    claim 1   , wherein the component (a) is an alkali metal nitrate.  
     
     
         10 . The composition according to    claim 1   , wherein the component (a) is potassium nitrate.  
     
     
         11 . The composition according to    claim 1   , wherein the component (b) is an oxide.  
     
     
         12 . The composition according to    claim 1   , wherein the component (b) is a copper oxide.  
     
     
         13 . The composition according to    claim 1   , wherein the oxidizing agent comprises strontium nitrate and a copper oxide.