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Development of Sustainable, Epoxy-Bound Mg/NaNO3 Compositions for the U.S. Army’s 40 mm Yellow Illuminant Flares
- Moretti, Jared D., Sabatini, Jesse J., Poret, Jay C., Gilbert, Robert
- ACS sustainable chemistry 2015 v.3 no.9 pp. 2232-2236
- epoxides, magnesium, phthalates, plasticizers, polyesters, risk, sodium nitrate, toxicity, volatile organic compounds
- We report here on the development of novel yellow-emitting pyrotechnic flares based on ground magnesium, sodium nitrate (NaNO₃), and a two-part epoxy thermoset. This work was aimed to eliminate the chemical exposure risk posed by the toxic and solvent-based polyester thermoset specified for two of the U.S. Army’s 40 mm yellow illuminant flares, the M585 star cluster and M583A1 star parachute signals. In particular, we describe efforts to develop a common replacement composition for both flares based on a two-part epoxy thermoset free of volatile organic chemicals (VOCs) or phthalate plasticizer. In addition, for the M583A1, we compare static burn performance of flares encased in Viton-laminated phenolic tubes to those in unlaminated tubes. A role for the Viton laminate is also proposed.