| 摘要 |
<p>A method of providing a thermal barrier between a fire and a combustible substrate, such as polyurethane foam, is provided. The method comprises the step of applying at least one coat of thin-film intumescent coating to the surface of the combustible substrate. The coating may be applied to the surface of the foam by any conventional means such as rolling or brushing, but is preferably spray applied with an airless sprayer. The thin-film intumescent coating may be solvent based but is preferably water based and preferably comprises polyvinyl acetate resins and inorganic fillers. The coating is typically applied range from 1-500 mils thick. The polyurethane foam is preferably spray-applied polyurethane foam with a density in the range of 0.5-3.2 lbs.</p> |
