Phase-stabilized ammonium nitrate and method of making same
AssigneeThiokol Corporation
InventorsThomas K. Highsmith, Carol J. Hinshaw, Robert B. Wardle
Life of this patent
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Abstract
Ammonium nitrate is phase-stabilized against Phase IV.rarw..fwdarw.Phase III transition and the undesired volume changes associated with that phase change by including an effective amount of at least one metal dinitramide salt having the formula MX.sub.n wherein M is a metal cation, X is a dinitramide anion, and n is 1, 2 or 3. The phase-stabilized ammonium nitrate is useful in energetic applications such as solid propellants and explosives.
Claims23
Phase-stabilized ammonium nitrate composition comprising ammonium nitrate and a phase-stabilizer comprising at least one metal dinitramide salt having the formula MX.sub.n wherein M is a metal cation, X is a dinitramide anion, and n is 1, 2 or 3, said metal dinitramide salt being present in a phase stabilizing amount.
A method for phase-stabilizing ammonium nitrate comprising adding an effective amount of a phase-stabilizer to ammonium nitrate, said phase-stabilizer comprising at least one metal dinitramide salt having the formula MX.sub.n wherein M is a metal cation, X is a dinitramide anion, n is 1, 2 or 3 whereby phase-stabilized ammonium nitrate is obtained.
A method for phase-stabilizing ammonium nitrate comprising adding about 1 wt. % to about 25 wt. % of a phase-stabilizer to ammonium nitrate, said phase-stabilizer comprising at least one metal dinitramide salt having the formula MX.sub.n wherein M is a metal cation selected from the group consisting of Li, Na, K, Rb, Cs, Ca, Ba, Sr, Mg, Cu, Ag, Au, Zn, Cd, Hg, Al, Sc, Y, Ga, B, In, Lanthanide Elements (57-71), Ti, Zr, Hf, Ge, Sn, V, Nb, Ta, Cr, Mo, W, Mn, Tc, Re, Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt, and mixtures thereof, X is a dinitramide anion, and n is 1, 2 or 3, whereby phase-stabilized ammonium nitrate is obtained.
Dependencies are inferred from the claim text.