PYROTECHNICAL RETARDING COMPOSITION Russian patent published in 2020 - IPC C06B33/00 

FIELD: pyrotechnics.

SUBSTANCE: pyrotechnical retarding composition contains powder of silicon Si as fuel, lead dioxide PbO₂ or lead oxide beads Pb₃O₄ as oxidising agent. Ingredients in the composition are taken in the following ratio, wt%: silicon Si 45-60 and lead dioxide PbO₂ 40-55 or silicon Si 30-50 and lead reddish Pb₃O₄ 50-70, at that specific surface of fuel is (0.6-1.8) m²/g, specific surface area of powder of lead dioxide PbO₂ - (0.2-1.0) m²/g and specific surface of powder of lead minnow Pb₃O₄ - (0.2-0.6) m²/g.

EFFECT: obtaining a predetermined burning time of a pyrotechnic retarding composition in retarders for different types of devices and high stability of burning rate when changing batches of initial components.

1 cl, 6 ex, 4 tbl, 6 dwg