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US 7,459,043 B2Granted
Moisture-resistant black powder substitute compositions
AssigneeAlliant Techsystems Inc.
InventorsReed J. Blau, Ruth A. Schaefer, Marlin Bodily, Gary Chen
Life of this patent
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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 does not contain charcoal or sulfur, is provided, as is a method for making such composition. A solid pyrotechnic composition, and method for making the same, which has a flame temperature and exhibits ballistic performance comparable to that of boron/potassium nitrate and that is preferably free of boron is also provided.
Claims24
A solid pyrotechnic composition consisting of:
- oxidizer particles comprising between about 40.0 weight percent and about 90.0 weight percent of a total weight of a solid pyrotechnic composition;
- organic crystalline particles comprising between about 10.0 weight percent and about 60.0 weight percent of the total weight of the solid pyrotechnic composition, wherein the organic crystalline particles comprise at least one organic crystalline compound or a mixture of the at least one organic crystalline compound and at least one salt of the at least one organic crystalline compound, wherein the at least one organic crystalline compound is selected from the group consisting of phenolphthalein and an organic crystalline compound derived from a reaction between a phenolic compound and phthalic anhydride;
- ethyl cellulose comprising between about 2.0 weight percent and about 10.0 weight percent of the total weight of the solid pyrotechnic composition;
- and
- a dry lubricant comprising between about 0.5 weight percent and about 2.0 weight percent of the total weight of the solid pyrotechnic composition.
2 more elements
Dependencies are inferred from the claim text.