PREPARATION OF STRENGTHENED AMMONIUM NITRATE PROPELLANTS
First Claim
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1. A process of forming a strengthened propellant composition comprising the steps of:
- providing ammonium nitrate; and
forming a primary mixture by adding a strengthening agent and a binder to the ammonium nitrate, wherein the amount of the binder is sufficient to form the primary mixture into a desired shape.
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Abstract
The present invention is directed to an age-stabilized and/or strengthened ammonium nitrate propellant composition wherein the strengthening agent is selected from the group consisting of azodicarbonamide, dicyandiamide, oxamide and mixtures thereof and wherein the age-stabilizing agent is a molecular sieve having a pore size of 13 angstroms or less.
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Citations
25 Claims
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1. A process of forming a strengthened propellant composition comprising the steps of:
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providing ammonium nitrate; and
forming a primary mixture by adding a strengthening agent and a binder to the ammonium nitrate, wherein the amount of the binder is sufficient to form the primary mixture into a desired shape. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A process of forming a strengthened propellant composition comprising the steps of:
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grinding ammonium nitrate; and
forming a mixture comprising;
ground ammonium nitrate in an amount from about 40 percent to about 80 percent by weight of the composition;
azidocarbonamide in an amount from about 8 percent to about 12 percent by weight of the composition;
polyglycol adipate; and
an additional component selected from the group consisting of trimethylol ethane trinitrate, triethylene glycol dinitrate, triethylene glycol trinitrate, butanetriol trinitrate, diethyleneglycol dinitrate, ethyleneglycol dinitrate, nitroglycerine, diethylene glycerin trinitrate, dinitroglycerine, nitrobenzene, N-butyl-2-nitratoethylnitramine, methyl-2-nitratoethylnitramine, ethyl-2-nitratoethylnitramine, cyclotrimethylene trinitramine, cyclotetramethylene tetranitramine, dinitroxyethylnitramine, and mixtures thereof. - View Dependent Claims (17, 18, 19, 20, 21)
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22. A process of forming an age-stabilized, strengthened propellant composition comprising the steps of:
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forming a primary mixture of ammonium nitrate and a molecular sieve, wherein the molecular sieve is present in an amount from about 0.2 percent to about 6 percent by weight of the composition;
aging the primary mixture for a first aging period;
forming a secondary mixture by adding a strengthening agent and a binder to the primary mixture, wherein the binder is present in an amount from about 5 percent to 30 percent by weight of the composition; and
aging the secondary mixture for a second aging period. - View Dependent Claims (23, 24, 25)
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Specification