Low humidity uptake solid pyrotechnic compositions and methods for making the same
First Claim
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1. A solid pyrotechnic composition comprising:
- oxidizer particles comprising from about 40 weight percent to about 90 weight percent of a total weight of the solid pyrotechnic composition, the oxidizer particles comprising at least one perchlorate and having a mean particle size of not greater than about 30 microns; and
organic crystalline particles comprising from about 10 weight percent to about 60 weight percent of the total weight of the solid pyrotechnic composition;
wherein from about 20 weight percent to about 90 weight percent of the solid pyrotechnic composition comprises the at least one perchlorate.
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Abstract
A solid pyrotechnic composition having a flame temperature and exhibiting ballistic performance comparable to that of black powder, but which is preferably formulated to contain neither charcoal nor sulfur, is provided. A solid pyrotechnic composition having a flame temperature and exhibiting ballistic performance comparable to that of boron/potassium nitrate and that is preferably free of boron is also provided.
32 Citations
48 Claims
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1. A solid pyrotechnic composition comprising:
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oxidizer particles comprising from about 40 weight percent to about 90 weight percent of a total weight of the solid pyrotechnic composition, the oxidizer particles comprising at least one perchlorate and having a mean particle size of not greater than about 30 microns; and
organic crystalline particles comprising from about 10 weight percent to about 60 weight percent of the total weight of the solid pyrotechnic composition;
wherein from about 20 weight percent to about 90 weight percent of the solid pyrotechnic composition comprises the at least one perchlorate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of making a solid pyrotechnic composition comprising:
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combining an alkali metal hydroxide with at least one organic crystalline compound to produce a solution comprising a salt of the at least one organic crystalline compound;
combining the solution with nitric acid to form alkali metal nitrate particles and to convert the salt of the at least one organic crystalline compound back to the at least one organic crystalline compound in particulate form, the alkali metal nitrate particles and the at least one organic crystalline compound in particulate form each having a mean particle size of not greater than about 30 microns; and
combining the alkali metal nitrate particles and the at least one organic crystalline compound in particulate form with additional oxidizer particles to form a pyrotechnic composition, the additional oxidizer particles having a mean particle size of not greater than about 30 microns and comprising at least one member selected from the group consisting of an alkali metal perchlorate and ammonium perchlorate;
wherein from about 40 weight percent to about 90 weight percent of a total weight of a solid pyrotechnic composition comprises the alkali metal nitrate particles and the additional oxidizer particles. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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27. A method of making a pyrotechnic composition comprising:
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combining an alkali metal hydroxide with at least one organic crystalline compound to produce a solution comprising a salt of the at least one organic crystalline compound;
combining the solution with perchloric acid to form alkali metal perchlorate particles and to convert the salt back to the at least one organic crystalline compound in particulate form, the alkali metal perchlorate particles and the at least one organic crystalline compound in particulate form each having a mean particle size of not greater than about 30 microns; and
combining the alkali metal perchlorate particles and the at least one organic crystalline compound in particulate form with additional oxidizer particles to form a pyrotechnic composition, the additional oxidizer particles having a mean particle size of not greater than about 30 microns and comprising at least one of at least one member selected from the group consisting of alkali metal nitrate and ammonium nitrate and at least one member selected from the group consisting of alkali metal perchlorate and ammonium perchlorate;
wherein from about 40 weight percent to about 90 weight percent of a total weight of the pyrotechnic composition comprises the alkali metal perchlorate particles and the additional oxidizer particles. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34)
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35. A solid pyrotechnic composition comprising:
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oxidizer particles comprising at least one of an alkali metal nitrate and ammonium nitrate and at least one of an alkali metal perchlorate and ammonium perchlorate; and
organic crystalline particles comprising at least one of phenolphthalein, an organic crystalline compound derived from a reaction between a phenolic compound and phthalic anhydride, fluorescein, 1,5-naphthalenediol, anthraflavic acid, and terephthalic acid;
wherein the solid pyrotechnic composition is free of sulfur. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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Specification