Gas generating composition

Abstract

The present invention is a gas generating composition including fuel and an oxidizing agent, which can be used for an inflator of a vehicle airbag apparatus, wherein the oxidizing agent includes basic copper carbonate, the gas generating composition having the content of the basic copper carbonate of more than 40% by mass and 60% by mass or lower, and satisfying the following requirements (a) to (c): (a) the burning rate is 7.0 mm/sec or above; (b) the gas output is 2.30 mol/100 g or above; and (c) the calorific value per mol of generated gas is 100 kJ/mol or lower.

1 . A gas generating composition, comprising fuel and an oxidizing agent, the oxidizing agent comprising basic copper carbonate, the composition having the content of the basic copper carbonate of more than 40% by mass and 60% by mass or lower, satisfying the following requirements (a) to (c):
 (a) the burning rate is 7 0 mm/sec or above;   (b) the gas output is 2.30 mol/100 g or above; and   (c) the calorific value per mol of the generated gas is 100 kJ/mol or lower.   
     
     
         2 . The gas generating composition according to  claim 1 , wherein the content of the basic copper carbonate is 42 to 60% by mass. 
     
     
         3 . The gas generating composition according to  claim 1 , wherein the oxidizing agent is a combination of the basic copper carbonate and a basic metal nitrate and/or a nitrate, and the total content of the oxidizing agent is 50 to 80% by mass. 
     
     
         4 . The gas generating composition according to  claim 1 , wherein the oxidizing agent is a combination of the basic copper carbonate and basic copper nitrate and/or strontium nitrate, and the total content of the oxidizing agent is 50 to 80% by mass. 
     
     
         5 . The gas generating composition according to  claim 1 , further comprising a carboxymethyl cellulose salt as a binder. 
     
     
         6 . The gas generating composition according to  claim 1 , further comprising aluminum hydroxide.