膨胀型涂料为多种建筑材料提供了简便有效的防火方法。国外继40年代后期膨胀型涂料首先用于木材阻火之后,现已有用于钢结构等方面的多种防火涂料。膨胀型涂料阻火的基本原理是,当火灾温度升高到约180℃时,涂料中含炭的成分开始分解并炭化,在温度升高的同时发泡剂释放出大量惰性气体并使之炭化隆起,成为象蛋糖霜似的泡沫。发泡层厚度比涂料的涂敷厚度高50倍以上。但它缺乏硬 Intumescent coatings provide a simple and effective method of fire protection for a wide range of building materials. Abroad, following the first expansion of intumescent coatings for wood in the late 1940s, many fire protection coatings for steel structures are now available. The basic principle of fire retardant intumescent coatings is that when the fire temperature is raised to about 180 ℃, the carbonaceous components in the paint begin to decompose and carbonize. At the same time as the temperature rises, the foaming agent releases a large amount of inert gas and carbonizes Uplift, like a frosted egg foam. The thickness of the foam layer is 50 times greater than the coating thickness of the coating. But it lacks hard