CAP PRIMER Russian patent published in 2012 - IPC F42B19/10 C06B25/04 

FIELD: weapons and ammunition.

SUBSTANCE: cap primer comprises a small cartridge with a head, a cap located at its bottom and containing a heat-resistant rust-free impact-ignition composition covered on top with the protective coating, where an anvil is rested, being arranged on shoulders available inside the cartridge and fixed with rolled edges of the cartridge mouth. The impact-ignition composition contains the following components (wt %): monobasic potassium styphnate 20-70, diazodinitrophenol 15-40, potassium salt of dinitrobenzofuroxane 2-10, an energy additive 4-10, a sensitiser 5-20.

EFFECT: higher efficiency of ignition and burning of a powder charge in ammunition.

4 cl, 3 tbl