Fire retardant efficiency of intumescent coatings for wood depending on particular modifiers

摘要

Intumescent coatings make the most efficient way of fire retarding of flammable materials. The coatings swell under the influence of heat and form a thick porous charred layer. The latter perfectly insulates a substrate against excessive increase of temperature and oxygen access. In order to make intumescent coatings more effective, a proper selection of essential components, i.e.carbonising, foam-producing and dehydrating materials, is necessary. The choice of components for an intumescent fire retardant composition has an essential effect on the rate of charred mass formation and its structure.