METHOD FOR PRODUCING SPHERICAL MONOBASIC POWDER FOR SMOOTHBORE WEAPONS 12 GAUGE Russian patent published in 2023 - IPC C06B21/00 C06B25/18 

FIELD: spherical powders.

SUBSTANCE: invention relates to producing spherical monobasic powder, by processing monobasic powders that do not meet the requirements of specifications for physical, chemical and ballistic characteristics, for equipping cartridges for 12-gauge smoothbore weapons with a shot shell mass of 36 g and 38 g. To obtain a spherical monobasic powder for 12-gauge smoothbore weapons, gunpowder and additives are mixed with ethyl acetate in water. An emulsifier is introduced – a protective colloid – before adding ethyl acetate. Stirring in water and ethyl acetate is carried out, and ethyl acetate is removed by heating. The preparation of powder varnish is carried out in an aqueous medium of powders with inappropriate requirements of specifications for physical, chemical and ballistic characteristics. 2.5-2.7 weight parts of water and 2.4-2.6 weight parts of ethyl acetate are stirred together with diphenylamine in the amount of 0.6-0.9 wt.% and graphite grade C-1 in the amount of 0.2-0.3 wt.%. Powder varnish is dispersed into spherical particles. 0-0.1 wt.% sodium sulfateNa₂SO₄ is introduced and then the ethyl acetate is removed by heating the mixture to 96-98°C. The obtained suitable fraction of powder elements with a size of 0.2-0.4 mm is phlegmatized from the surface with dinitrotoluene 0.2-1.5 wt.% and centralite I 0.3-3.5 wt.%. Graphite grade C-1 in the amount of 0.1-0.2 wt.% is used to the finish surface. Then final drying is performed to a moisture content of 0.2-0.4%. The bulk density of the spherical monobasic powder is 0.620-0.740 g/cm³.

EFFECT: method will provide ballistic characteristics in a 12-caliber smoothbore weapon with a shot shell mass of 36 g and 38 g.

1 cl