POROUS PYROXYLIN GUNPOWDER AND METHOD OF ITS RETARDATION Russian patent published in 1997 - IPC

FIELD: explosive materials. SUBSTANCE: gunpowder has, wt.-%: di-n-butylphthalate or di-n-octylphthalate, or α-ω-methacryl-(bis-triethylene glycol)-phthalate, or tri-(hydroxyethylene)-a,ω-methacrylate, or diethyldiphenylurea, or dimethyldiphenylurea, or their mixture 0.3-0.8; diphenylamine 0.8-1.4; potassium nitrate 0.1-0.5; graphite 0.1-0.9; volatile substances 0.2-1.8, and nitrocellulose at nitrogen content 204-213 ml NO/g - the rest. Method of pyroxylin gunpowder retardation involves treatment of gunpowder preliminary kept at retardation point 60-90 C for 10-20 with retarding agent as emulsion heated to retardation point for 15-20 min and graphitization is carried out after drying stage. EFFECT: enhanced quality, improved method of retardation. 3 cl, 1 tbl