Explosive Composition and Explosive Composition Shaped Body as Well as Method for Producing the Same

Abstract

The invention provides an explosive composition obtained by milling a fuel component and an oxidizer component with an aqueous emulsion of a hydrophobic tackifier and drying them, which is high in the water resistance and good in the extrusion moldability and cleanability of a shaping machine and less in the production problem. Also, the explosive composition according to the invention is preferable to be applied as a shaped body to a gas generating agent, an autoignition agent, an enhancer agent or the like. Further, the explosive composition shaped body according to the invention is particularly preferable to be used for a gas generator actuating an automobile safety device.

1 . An explosive composition characterized by milling and drying a fuel component and an oxidizer component in the presence of an aqueous emulsion of a hydrophobic tackifier. 
   
   
       2 . The explosive composition according to  claim 1 , wherein a content of the hydrophobic tackifier is 2-15 mass %. 
   
   
       3 . The explosive composition according to  claim 1 , wherein the hydrophobic tackifier is at least one selected from the group consisting of a rubber-based tackifier, an acryl-based tackifier and a silicone-based tackifier. 
   
   
       4 . The explosive composition according to  claim 3 , wherein the hydrophobic tackifier is an acryl-based tackifier. 
   
   
       5 . The explosive composition according to  claim 3 , wherein the hydrophobic tackifier has a heat decomposition temperature of not lower than 200° C. 
   
   
       6 . The explosive composition according to  claim 1 , wherein the fuel component is a nitrogen-containing compound and/or boron. 
   
   
       7 . The explosive composition according to  claim 6 , wherein the nitrogen-containing compound is at least one selected from the group consisting of guanidine, tetrazole, bitetrazole, triazole, hydrazine, triazine, azodicarbonamide, dicyanamide and derivatives thereof and a nitramine compound. 
   
   
       8 . The explosive composition according to  claim 1 , wherein the oxidizer component is at least one selected from the group consisting of a chlorate, a perchlorate, a nitrate and a basic nitrate. 
   
   
       9 . The explosive composition according to  claim 8 , wherein the oxidizer component is at least one selected from the group consisting of ammonium perchlorate, potassium perchlorate, sodium perchlorate, potassium nitrate, sodium nitrate, strontium nitrate and basic copper nitrate. 
   
   
       10 . The explosive composition according to  claim 1 , which further contains at least one component selected from a metallic powder, silicon nitride and a metal nitride. 
   
   
       11 . The explosive composition according to  claim 1 , which further contains a surfactant. 
   
   
       12 . The explosive composition according to  claim 11 , wherein the surfactant is a nonionic surfactant having a HLB value of not more than 15. 
   
   
       13 . An explosive composition shaped body characterized by milling, shaping and drying a fuel component and an oxidizer component as claimed in  claim 1  in the presence of an aqueous emulsion of a hydrophobic tackifier. 
   
   
       14 . The explosive composition shaped body according to  claim 13 , wherein the shaped body is any of a gas generating agent, an autoignition agent and an enhancer agent. 
   
   
       15 . The explosive composition shaped body according to  claim 13 , wherein the shaped body is for an automotive safety device. 
   
   
       16 . The explosive shaped body according to  claim 13 , wherein the shaped body has any of a granular form, a tablet form, a columnar form, a cylindrical form, a prismatic form, a porous cylindrical form and a porous prismatic form. 
   
   
       17 . The explosive composition shaped body according to  claim 13 , which further contains at least one component selected from a metallic powder, silicon nitride and a metal nitride. 
   
   
       18 . The explosive composition shaped body according to  claim 13 , which further contains a surfactant. 
   
   
       19 . The explosive composition shaped body according to  claim 18 , wherein the surfactant is a nonionic surfactant having a HLB value of not more than 15. 
   
   
       20 . A method of producing an explosive composition, which comprises milling a fuel component and an oxidizer component with an aqueous emulsion of a hydrophobic tackifier and drying them. 
   
   
       21 . A method of producing an explosive composition shaped body, which comprises milling a fuel component and an oxidizer component with an aqueous emulsion of a hydrophobic tackifier and shaping, drying and solidifying them. 
   
   
       22 . The method of producing an explosive composition shaped body according to  claim 21 , wherein the shaping is an extrusion molding. 
   
   
       23 . The explosive composition according to  claim 2 , wherein the hydrophobic tackifier is at least one selected from the group consisting of a rubber-based tackifier, an acryl-based tackifier and a silicone-based tackifier. 
   
   
       24 . The explosive composition according to  9 , which further contains at least one component selected from a metallic powder, silicon nitride and a metal nitride.