Non-toxic primer powder composition for small caliber ammunition

Abstract

The present invention relates to a non-toxic primer powder composition for small caliber ammunition characterized by comprising potassium nitrate coated with shellac as an oxidizer, and particularly characterized by comprising 25-40 wt % of an initiating explosive, 10-30 wt % of nitrate ester as a fuel, 32-40 wt % of a shellac-coated potassium nitrate (KNO 3 ) as an oxidizer, 5-10 wt % of tetracene as a first sensitizer, 3-9 wt % of a borosilicate powder as a second sensitizer and 0.1-0.2 wt % of a chemical binder.

1 . A primer powder composition for small caliber ammunition which comprises an initiating explosive, a fuel, an oxidizer, a sensitizer and a chemical binder, characterized by comprising a shellac-coated potassium nitrate as the oxidizer.  
   
   
       2 . The primer powder composition for small caliber ammunition according to  claim 1 , wherein the shellac-coated potassium nitrate has the weight ratio of shellac to potassium nitrate being 0.007:1˜0.025:1.  
   
   
       3 . The primer powder composition for small caliber ammunition according to  claim 1 , wherein the composition consists of 25-40 wt % of an initiating explosive, 10-30 wt % of nitrate ester as a fuel, 32-40 wt % of a shellac-coated potassium nitrate as an oxidizer, 5-10 wt % of tetracene as a first sensitizer, 3-9 wt % of a borosilicate powder as a second sensitizer and 0.1-0.2 wt % of a chemical binder.  
   
   
       4 . The primer powder composition for small caliber ammunition according to  claim 1 , wherein the initiating explosive is one or more selected from the group consisting of a diazo compound including diazodinitrophenol, a triazole compound, a tetrazole compound and a nitrobenzene compound such as potassium dinitrobenzofroxane and monopotassium styphnate.  
   
   
       5 . The primer powder composition for small caliber ammunition according to  claim 1 , wherein the chemical binder is a mixture of arabian gum, tragacanth and gelatin mixed with a weight ratio of 9:5:1.