Patent ID: 8277583
Filing Date: 2012-10-02
Classification: C06B,C06C

Abstract:
1. A perchlorate-free pyrotechnic flare composition for producing a red flame, the composition comprising, by weight, a magnesium fuel within the range of approximately twenty-five percent (25%) to approximately thirty four percent (34%) of the composition, the magnesium fuel including particles sizes selected from the group consisting of granulation a strontium nitrate oxidizer within the range of approximately forty-five percent (45%) to approximately fifty-three percent (53%) of the composition, a polyvinyl chloride color enhancer within the range of approximately thirteen percent (13%) to approximately sixteen percent (16%) of the composition, a two-part curable binder system within the range of approximately five percent (5%) to approximately seven percent (7%) of the composition, the binder system 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, and a stoichiometric ratio of the strontium nitrate oxidizer to the polyvinyl chloride color enhancer of at least 3.43; wherein during a burn, the red flame of the perchlorate-free pyrotechnic composition has a minimum dominant wavelength of at least 607 nm and a minimum color purity of at least 92%.