Akardite

Akardit I dient als - Stabilisator fur Schielipulver, besonders fur Nitro-glycerin-Pulver es geht als Gelatinator in das Pulvergel ein. 

Akardit III wird als - Stabilisator und als Gelatinator in mehrbasigen, losemittelfreien Schielipulvern verwendet. 

Centralit I Symm. Diethyldiphenylharnstoff Centralit II Symm. Dimethyldiphenylharnstoff Centralit III Methylethyldiphenylharnstoff Akardit II Methyldiphenylharnstoff Akardit III Ethyldiphenylharnstoff Ethyl- und Methylphenylurethan Diphenylurethan... 

Acardite or asym-Diphenylurea, described in Vol 1 of Encycl (Ref 24, p A47-R), was developed in Germany under the name of Akardit. It has been used, accdg to Belgrano (Ref 31, p 218) as a stabilizer in some Italian smokeless propellants... 

Acardite or akardite 1 A7-A11 acardite 11 A7—A8 acardite I11 A8 acardite III 1 A8—A9 acardites, analytical procedures 1 A9-A11... 

Other stabilizers, which are primarily used abroad, include Akardit I (as-diphenylurea), Central it I (sym-diethyldiphenylurea), Central it II (sym-dimethyldiphenylurea), Centralit 111 (methylethyldiphenylurea), Akardit II (methyl-diphenylurea), Akardit 111 (ethyldiphenylurea), ethyl — and methylphenylurethanes, diphenyl-urethanes, dibutyl and diamyl phthalates, camphor and vaseline... 

Akardit. Ger name for Acardite A(ko) or Type A Explosive. A Japan expl similar to Ger Hexamit TNT(or TNAns) 60, HNDhA 24 A1 powder 16%. It was intended for use in torpedo warheads and depth charges to replace the Type 94 and Type 97H Explosives (See Japanese Type Explosives) Refs 1)R. A.Cooley et al, PBL Rept... 

Stabilizers that affect the degradation of ADN have been reported. Examples are hexamethylene tetramine, 2-nitrodiphenylamine and akardite II (methyldiphenylurea). They drastically decrease the rate of degradation, by a factor of 2 - 4 at 800°C [26]. MgO has the effect of increasing the time to autocatalytic decomposition in a melt at 98°C from 3 to 24 hours. Hexamine is used in commercially-available prilled ADN, in which it has been shown to reduce gas evolution after 40 hours at 80°C from 0.88 to 0.33 ml/g. Urea has also been shown to have this effect. All of the stabilizers described above are weak nitrogen bases except MgO. This agrees with the evidence that acids catalyze the degradation. 

Methylathyldiphenylharnstoff = Cen-tralit III (german) 57 methylamine nitrate 214, 328 methyldiphenylurea Methyldiphenyl-harnstoff = Akardit II 9 163 298 326... 

Akardite I serves as - Stabilizer for gunpowders, in particular for -> Double Base Propellants. 

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