Pyrotechnic composition

Abstract

A pyrotechnic composition, in particular for use in safety arrangements for motor vehicles, has an auto-ignition temperature between 140 and 180 degrees C. and contains hydroxybenzotriazole in an amount of about 25 to 95% by weight of the composition.

1 . A pyrotechnic composition, in particular for use in safety arrangements for motor vehicles, having an auto-ignition temperature of between 140 and 180 degrees C., characterized in that the composition contains hydroxybenzotriazole in an amount of about 25 to 95% by weight of the composition.  
   
   
       2 . The pyrotechnic composition according to  claim 1 , characterized in that the composition contains at least one of sulphur and an inorganic sulphur compound in an amount of about 1 to 20% by weight of the composition.  
   
   
       3 . The pyrotechnic composition according to  claim 2 , characterized in that the inorganic sulphur compound is selected from the group consisting of sulphates, sulphites, thiosulphates, thiosulphites, disulphites, disulphates, dithionites, dithionates, peroxosulphates, peroxodisulphates, thiocyanates, isothiocyanates, sulphides and polysulphides, as well as mixtures thereof.  
   
   
       4 . The pyrotechnic composition according to  claim 2 , characterized in that the composition further contains at least one of a fuel and an oxidizer.  
   
   
       5 . The pyrotechnic composition according to  claim 4 , characterized in that the fuel is selected from the group consisting of guanidine compounds, triazoles, tetrazoles, bitetrazoles, dinitramides and metals, as well as mixtures thereof.  
   
   
       6 . The pyrotechnic composition according to  claim 4 , characterized in that the oxidizer is selected from the group consisting of nitrates, nitrites, perchlorates, chlorates, and peroxides of alkali metals, alkaline earth metals and transition metals, ammonium nitrate, ammonium perchlorate and transition metal oxides, and mixtures thereof.  
   
   
       7 . The pyrotechnic composition according to  claim 5 , characterized in that the fuel is selected from the group consisting of guanidine nitrate, guanylureadinitramide and nitroguanidine.  
   
   
       8 . The pyrotechnic composition according to  claim 6 , characterized in that the oxidizer is at least one of potassium nitrate and ammonium perchlorate.  
   
   
       9 . The pyrotechnic composition according to  claim 2 , wherein the composition comprises about 30 to 90% by weight of hydroxybenzotriazole and at least one of said sulphur and said inorganic sulphur compound in an amount of about 1 to 10% by weight.  
   
   
       10 . The pyrotechnic composition according to  claim 2 , wherein the composition consists essentially of about 30 to 90% by weight of hydroxybenzotriazole, 1 to 15% by weight at the least one of said sulphur and said inorganic sulphur compound, 0 to 60% by weight of said oxidizer and 0 to 20% by weight of said fuel.  
   
   
       11 . The pyrotechnic composition of  claim 1 , wherein the composition further contains at least one of a fuel and an oxidizer.  
   
   
       12 . The pyrotechnic composition of  claim 11 , wherein the fuel is selected from the group consisting of guanidine compounds, triazoles, tetrazoles, bitetrazoles, dinitramides and metals, as well as mixtures thereof.  
   
   
       13 . The pyrotechnic composition of  claim 11 , wherein the oxidizer is selected from the group consisting of nitrates, nitrites, perchlorates, chlorates, and peroxides of alkali metals, alkaline earth metals and transition metals, ammonium nitrate, ammonium perchlorate and transition metal oxides, and mixtures thereof.  
   
   
       14 . The pyrotechnic composition of  claim 1 , wherein the composition is adapted for use in a gas generator of an occupant restraint system in vehicles, said gas generator including a gas generating composition, and said pyrotechnic composition auto-ignites under vehicle fire conditions to activate said gas generating composition.