以改性丙烯酸酯类乳液为成膜物质,聚磷酸铵、季戊四醇、三聚氰胺为膨胀阻燃体系,并添加可膨胀石墨、硫酸镁晶须进行改性,制备水性超薄膨胀型钢结构防火涂料.采用垂直燃烧法、热重分析(TGA)、扫描电镜(SEM)、X射线衍射(XRD)等方法研究了防火涂层的结构与耐火性能,结果表明,以硅丙乳液和环氧改性丙烯酸酯乳液复配为成膜物质,受火膨胀后防火涂层形成了致密的“蜂窝”状结构,获得较好的防火性能.钛白粉在高温中能转变成焦磷酸钛,对提高防火性能起到积极的作用.添加可膨胀石墨和晶须具有明显的协效阻燃效果.3％可膨胀石墨和3％硫酸镁晶须共同改性的防火涂层在800℃的残余质量为36％.
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