Abstract
A few fire retardant intumescent coatings based on ammonium phosphate, cyanoguanidine, 2- 2 bis hydroxymethyl 1,3-propanediol (polyol), and a binder (a copolymer of vinyl acetate acrylate copolymer emulsion and an amino resin) have been developed for wood and wood-based products. The fire performance of the coatings has been evaluated employing differing BS and ASTM standards. On exposure, the coated specimens neither show any surface spread of flame nor any afterglow combustion. The coatings are found to be quite effective in reducing smoke generation, and they possess good water repellency and adhesion.
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