Explosives with low sensitivity - contain amino- and/or hydroxy-substd. 3,5-di:nitro-pyridine or the corresp. 1-oxide, and normal carriers

摘要

Explosive materials (I) contain a cpd. of formula (II) together with normal carrier substances. In (II)( R1, R2, R3 = H, NH2 or OH, with at least one substit. = NH2 or OH and at least one = H, x = 0 or 1. 2-Amino-6-hydroxy-3,5-dinitropyridine (IIA) and its 1-oxide (IIB), 2,6-diamino-3,5- dinitro-pyridine 1-oxide (IIC) and 4-amino3,5-dinitropyridine 1-oxide (IID) are claimed examples of (II). 2,6-Diamino-3,5-dinitropyridine (III) is produced by reaction of 2,6-diamino-pridine (IV) for 1-3 (pref. 2) hrs. with 2 equivs. (NO)-free nitric acid (d = 1.48) in acid medium at below 0 deg.C, heating for 1-3 (pref. 2) hrs. at 60-70 deg.C, pouring onto ice, neutralising to pH 5-6 and boiling the filtered ppte. in alkaline soln. for 30 mins. (IIA) is produced by reaction of (IV) with more than 2 equivs. (V) for 2-4 (pref. 3) hrs. as above, heating as above for the same temp. and cooling to 0 deg.C; (IID) is produced by addn. of 4-amino-3,5-dinitropyridine to a mixt. of AcOH and 30 wt.% H2O2 and stirring (opt. at reduced temp.) until the mixt. crystallises, (IIC) is produced by refluxing (III) with 30 wt.% H2O2 in AcOH; (IIB) is produced by reaction of (IIA) with 30 wt.% H2O2 in CF3COOH at room temp.. USE/ADVANTAGE - (I) have low sensitivity and good explosive properties, with initiating properties and rate of detonation comparable to that of TNT; they are relatively easily produced, and do not require a multi-stage process to introduce 3 nitro gps..