Flame Retardant Smoke Suppressant Coatings for PVC Sheathed Electric Cables

Abstract

Flame retardant smoke suppressant intumescent coatings, based on phosphates, amides, polyols, propanediono complex of molybdenum, vinyl acetate and vinyl versatate  copolymer emulsion are developed for polyvinl chloride (PVC) sheathed electrical cables. National and international standard procedures are followed to evaluate the fire performance of the coatings. The coated cab les do not show any surface spread of flame on exposure and generation of smoke is found to be well within the limits, in accordance with the ASTM standards. The coatings are found quite effective in reducing the burning behaviour of power cables. Significant improvement in circuit failure time is noted in coated cable specimens.