IGNITION COMPOSITIONS, AND PREPARATIONS AND USES THEREOF
An ignition composition comprising a low electron affinity material, an oxidizer and a binder. The ignition composition may be made by A1) preparing a coagulation composition by a shock-gel process using the ingredients of the ignition composition disclosed herein, which comprises: A1-a) dissolving the binder in a low-boiling-point polar solvent to provide a binder solution; A1-b) mixing the low electron affinity material and the oxidizer with the binder solution; and A1-c) adding a low-boiling-point non-polar solvent to the mixture provided by step 1-b) to precipitate the binder and form the coagulation composition; and A2) converting the coagulation composition into granular composition using a suitable method.
1 . An ignition composition comprising a low electron affinity material, an oxidizer and a binder.
2 . The ignition composition according to claim 1 , wherein the low electron affinity material is selected from the group consisting of boron (B), magnesium (Mg), zirconium (Zr), tungsten (W), tantalum (Ta), aluminum (Al), iron (Fe), and manganese (Mn).
3 . The ignition composition according to claim 1 , wherein the oxidizer is selected from the group consisting of nitrates, perchlorates, and oxides.
4 . The ignition composition according to claim 3 , wherein the oxidizer is selected from the group consisting of barium nitrate, calcium nitrate, ammonium perchlorate, and CuO.
5 . The ignition composition according to claim 1 , wherein the binder is selected from the group consisting of Fluorel, acrylic rubbers, Hytemps, Kraton rubbers, and any combinations thereof.
6 . The ignition composition according to claim 1 , further comprising additives selected from the group consisting of antioxidants, moisture scavengers, and combinations thereof.
7 . The ignition composition according to claim 6 , wherein the ignition composition comprises antioxidant of about 0.1% to about 0.15% by weight.
8 . The ignition composition according to claim 6 , wherein the antioxidant is A02246 (2,2′-Methylenebis(4-methyl-6-tert-butylphenol).
9 . The ignition composition according to claim 6 , wherein the moisture scavenger is molecular sieves.
10 . The ignition composition according to claim 1 , wherein the electron affinity of the ignition composition is less than 1 eV.
11 . A method of making the ignition composition according to claim 1 , comprising:
A1) preparing a coagulation composition by a shock-gel process using the ingredients of the ignition composition disclosed herein, which comprises:
A1-a) dissolving the binder in a low-boiling-point polar solvent to provide a binder solution;
A1-b) mixing the low electron affinity material and the oxidizer with the binder solution; and
A1-c) adding a low-boiling-point non-polar solvent to the mixture provided by step I-b) to precipitate the binder and form the coagulation composition; and
A2) converting the coagulation composition into granular composition using a suitable method.
12 . The method according to claim 11 , wherein the low-boiling-point polar solvent is a ketone or a mixture of multiple ketones.
13 . The method according to claim 11 , wherein the low-boiling-point nonpolar solvent is a saturated hydrocarbon or a mixture of multiple saturated hydrocarbons.
14 . The method according to any of claim 11 , wherein the ratio of polar solvent and the non-polar solvent is about 1:3.
15 . A method of preparing the ignition composition according to claim 1 using a static mixer, comprising the following steps:
B1) introducing a first stream of binder/polar solvent/low electron affinity material/oxidizer mixture to the static mixer;
B2) intersecting the first stream in step B1) with a second stream of non-polar solvent in the static mixer; and
B3) forming granules of the ignition compositions through the turbulence of the static mixer.
16 . The method according to claim 15 , wherein the low-boiling-point polar solvent is a ketone or a mixture of multiple ketones.
17 . The method according to claim 15 , wherein the low-boiling-point nonpolar solvent is a saturated hydrocarbon or a mixture of multiple saturated hydrocarbons.
18 . The method according to claim 15 , wherein the ratio of polar solvent and the non-polar solvent is about 1:3.
19 . A method of preparing the ignition composition according to claim 1 , comprising the following steps:
C1) mixing all ingredients of the ignition composition using a mixer; and
C2) granulating the mixture obtained from step C1.
20 . A method of using the ignition composition according to claim 1 for decoy countermeasures, comprising discharging a decoy composition comprising the ignition composition.
21 . The method of claim 20 , wherein the ignition composition is used with one or more other ballistic missile decoy mechanisms.
22 . The method of claim 21 , wherein the one or more other ballistic missile decoy mechanisms are selected from the group consisting of chaff, decoy balloons, warhead simulators and electronic countermeasures.