# US 8,784,584 B2 · Perchlorate-free yellow signal flare composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,784,584 B2 - Document ID: US8784584B2 - Status: Granted - Kind: B2 - Application number: 13/935,069 - Filed: 2013-07-03 - Published: 2013-11-07 - Granted: 2014-07-22 - Earliest claimed: 2008-06-25 - Assignees: The United States of America as represented by the Secretary of the Navy - Applicants: Christina M. Yamamoto; Robert G. Shortridge - Inventors: Christina M. Yamamoto; Robert G. Shortridge - Web page: https://patentgrep.com/patent/US8784584B2 ## CPC - C06B 33/14: at least one being an inorganic nitrogen-oxygen salt - C06B 33/04: the material being an inorganic nitrogen-oxygen salt - C06C 15/00: Pyrophoric compositions; Flints (chemical lighters C06C9/00) - C06B: EXPLOSIVES OR THERMIC COMPOSITIONS (blasting F42D); MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES (compounds in general C01, C07 or C08; {demolition agents based on cementitious or like materials C04B41/0009}) - C06C: DETONATING OR PRIMING DEVICES; FUSES (ammunition fuzes F42C); CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS ## Abstract Perchlorate-free flare compositions are disclosed which, when burned, produce yellow smoke and flames. Methods of producing the compositions are also disclosed. ## Claims ### Claim 1 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. ### Claim 2 (depends on 1) The composition of claim 1, wherein the magnesium fuel is approximately twenty percent (20%) of the composition. ### Claim 3 (depends on 2) The composition of claim 2, wherein the magnesium fuel includes mixtures of particle sizes. ### Claim 4 (depends on 1) The composition of claim 1, wherein the sodium nitrate is approximately thirty-seven percent (37%) of the composition. ### Claim 5 (depends on 1) The composition of claim 1, wherein the barium nitrate is approximately twenty-seven percent (27%) of the composition. ### Claim 6 (depends on 1) The composition of claim 1, wherein the polyvinyl chloride is approximately eleven percent (11%) of the composition. ### Claim 7 (depends on 1) The composition of claim 1, wherein the binder system is approximately five percent (5%) of the composition. ### Claim 8 (depends on 1) The composition of claim 1, wherein the epoxy is approximately three point five percent (3.5%) of the composition. ### Claim 9 (depends on 1) The composition of claim 1, wherein the curing agent is approximately one point five percent (1.5%) of the composition. ### Claim 10 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. ### Claim 11 (depends on 1) The composition of claim 1, wherein the polyamide resin includes a reactive polyamide resin derived from dimerized fatty acid and polyamindes. ### Claim 12 (depends on 1) The composition of claim 1, wherein the composition excludes perchlorate. ### Claim 13 (depends on 1) The composition of claim 1, wherein the composition excludes calcium nitrate. ### Claim 14 (depends on 10) The composition of claim 10, wherein the magnesium fuel is approximately twenty percent (20%) of the composition. ### Claim 15 (depends on 14) The composition of claim 14, wherein the magnesium fuel includes mixtures of particle sizes. ### Claim 16 (depends on 10) The composition of claim 10, wherein the sodium nitrate is approximately thirty-seven percent (37%) of the composition. ### Claim 17 (depends on 10) The composition of claim 10, wherein the barium nitrate is approximately twenty-seven percent (27%) of the composition. ### Claim 18 (depends on 10) The composition of claim 10, wherein the polyvinyl chloride is approximately eleven percent (11%) of the composition. ### Claim 19 (depends on 10) The composition of claim 10, wherein the binder system is approximately five percent (5%) of the composition. ### Claim 20 (depends on 10) The composition of claim 10, wherein the epoxy is approximately three point five percent (3.5%) of the composition. ### Claim 21 (depends on 10) The composition of claim 10, wherein the curing agent is approximately one point five percent (1.5%) of the composition.