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US 8,784,584 B2Granted
Perchlorate-free yellow signal flare composition
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsChristina M. Yamamoto, Robert G. Shortridge
Life of this patent
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Abstract
Perchlorate-free flare compositions are disclosed which, when burned, produce yellow smoke and flames. Methods of producing the compositions are also disclosed.
Claims21
A flare composition for producing a yellow flame, the composition comprising, by weight,
- a magnesium fuel within the range of approximately eighteen percent (18%) to approximately thirty percent (30%) of the composition, the magnesium fuel including particles sizes selected from the group consisting of granulation 15, granulation 17, granulation 18, and mixtures thereof,
- a magnesium-aluminum alloy within the range of approximately zero percent (0%) to approximately five percent (5%) of the composition,
- a sodium nitrate within the range of approximately eighteen percent (18%) to approximately thirty-eight percent (38%) of the composition,
- a barium nitrate within the range of approximately twenty-six percent (26%) to approximately thirty-six percent (36%) of the composition,
- a polyvinyl chloride within the range of approximately seven percent (7%) to approximately twelve percent (12%) of the composition,
- an asphaltum within the range of approximately zero percent (0%) to approximately five percent (5%) of the composition, and
- a two-part curable binder system within the range of approximately four percent (4%) to approximately seven point five percent (7.5%) of the composition, the binder system including within the range of approximately seventy percent (70%) to approximately eighty percent (80%) epoxy and within the range of approximately twenty percent (20%) to approximately thirty percent (30%) curing agent;
- wherein the curing agent includes polyamide resin.
5 more elements
A flare composition for producing a yellow flame, the composition comprising, by weight,
- a magnesium fuel within the range of approximately eighteen percent (18%) to approximately thirty percent (30%) of the composition, the magnesium fuel including particles sizes selected from the group consisting of granulation 15, granulation 17, granulation 18, and mixtures thereof,
- a magnesium-aluminum alloy within the range of approximately zero percent (0%) to approximately five percent (5%) of the composition,
- a sodium nitrate within the range of approximately eighteen percent (18%) to approximately thirty-eight percent (38%) of the composition,
- a barium nitrate within the range of approximately twenty-six percent (26%) to approximately thirty-six percent (36%) of the composition,
- a polyvinyl chloride within the range of approximately seven percent (7%) to approximately twelve percent (12%) of the composition,
- an asphaltum within the range of approximately zero percent (0%) to approximately five percent (5%) of the composition, and
- a two-part curable binder system within the range of approximately four percent (4%) to approximately seven point five percent (7.5%) of the composition, the binder system including within the range of approximately seventy percent (70%) to approximately eighty percent (80%) epoxy and within the range of approximately twenty percent (20%) to approximately thirty percent (30%) curing agent;
- wherein the epoxy includes a liquid bisphenol-A based epoxy resin diluted with cresyl glycidyl ether.
5 more elements
Dependencies are inferred from the claim text.