Evaluation of Some Chromene Derivatives as Additives in Fire Retardant and Anticorrosive Coating Composition

Abstract

  Epoxy coating was modified by physically mixing with 2,7-diamino-4-(4-chlorophenyl)-4H-chromene -3- carbonitrile (I), 2,7-diamino-4-(4-nitrophenyl)-4H-chromene-3- carbonitrile (II) and E7-amino-2-oxo-4-styryl-2H-chromene-3-carbonitrile (III) by the ratio of 0.3, 0.5 and 1.0% by weight. In order to achieve a proper ratio of chromene derivatives to produce a green epoxy formulation for surface organic coating application. A corrosion performance of mild steel coated specimens was investigated employing salt spray test. The coating modified with 1.0% of and E7-amino-2-oxo-4-styryl-2H-chromene-3-carbonitrile (III) possessed the best corrosion performances, among the coated specimens- Also the fire retardant of the modified epoxy varnishes was investigated by using limited oxygen index (LOI) chamber, and the result was 1.0 % of 2,7-diamino-4-(4-nitrophenyl)-4H-chromene-3- carbonitrile (II) gives the highest flame retardant outcome.