COMPOSITION OF STARTING BRIQUETTE FOR SELF-CONTAINED BREATHING APPARATUS Russian patent published in 2025 - IPC A62D9/00 

FIELD: chemistry.

SUBSTANCE: invention relates to compositions of chemical substances used in self-contained breathing apparatus on chemically bound oxygen. Starting briquette of the isolating respiratory apparatus contains a starting composition – 0.86-2.39 wt.%, transition composition – 1.99-4.31 wt.% and basic composition – 93.30-97.15 wt.% of briquette weight. Starting composition contains powdered zirconium in amount of 20-30 wt.%, potassium perchlorate (KClO₄) in amount of 10-20 wt. % and sodium or potassium chromates (Na₂CrO₄ or K₂ClO₄) in amount of 50-65 wt.%. Transition composition contains 2.0-6.0 wt.% of amorphous boron, 60-70 wt.% iron oxide Fe₂O₃, 25-35 wt.% copper oxide (CuO) and 1.5-2.5 wt.% of chrysotile asbestos. Basic composition contains 3.0÷6.0 wt.% of powdered zirconium, 4.0÷8.0 wt.% cobalt oxide Co₃O₄, 83.5÷91.5 wt.% sodium chlorate (NaClO₃) and 1.5÷2.5 wt.% chrysotile asbestos. Starting composition is intended for launching a percussion-type capsule from the flame beam, for example, a Gevelot capsule and initiating decomposition of the transition composition, which, in its turn, is intended for initiating the launch of the basic composition which generates the oxygen required for the user.

EFFECT: starting briquette has high operational characteristics during its operation in a cartridge of an isolating breathing apparatus.

1 cl, 1 dwg, 2 tbl