Detonation rate urea nitrate

Urea nitrate is insensitive to friction and to impact. The density of the substance subjected to a pressure of 1500 kg/cm3 is 1.59 g/cm3. In the lead block test it caused an expansion of 260 (Kast) or 270 cm3 (T. Urbanski, Kapuscinski, Wojcie-chowski [59]). It detonates somewhat better than ammonium nitrate and guanidine nitrate, but a No. 8 detonator did not provoke complete detonation. Medard [59a] reported that urea nitrate gives a relative figure of the lead block expansion 79.6 (picric acid = 100) and the rate of detonation of 30 mm dia. charges is ... 

TNT 7.5, Al dust 0.5, coal 3 and chalk 0.5%. The introduction of up to 10% of hydrazine nitrate in an AN expl markedly increases sensitivity and deton rate. AN and hydrazine nitrate are prefetbably mixed together prior to the addition of other ingredients, or they may be fused, solidified and subdivided prior to such addition (Ref 80) k)An expl obtai ned by neutralization of an acidic nitrated polyol such as NG by the addition of amines or amides such as urea, especially i n the form of a melt with AN i n a eutectic mixt. The expl is stable i n storage, especially when the amine or amide is present in excess(Ref 87)... 

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