摘要
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%。
The water based ultra-thin intumescent fire retardant coating was prepared using modified acrylic as binders and ammonium polyphosphate, pentaerythritol, melamine as flame retardant system. Expandable graphite and magnesium sulfate whisker were used to modify the fire retardant coating. The fireproof performance of fire retardant coatings was studied by vertical combustion method, thermogravimetric analysis（TGA） and X-ray diffraction （XRD）. The intumescent char structure was surveyed by SEM. The results reveal that the water based ultra thin intumescent fire retardant coating forms dense “honeycomb” intumescent char structure by using silicone-acrylic emulsion and epoxy-acrylic emulsion as binders and achieves a good fireproof performance. Titanium dioxide is transformed into titanium pyrophosphate at high temperature, which plays a positive role to improve the fire resistance of coatiings. The expandable graphite and the whisker have significant synergistic flame retardant effect. With 3% expandable graphite and 3% magnesium sulfate whisker, the residual mass of coatings at 800 ℃ is 36%.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2014年第3期170-174,共5页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(51173153,U1205113)
福建省自然科学基金资助项目(2012J01234)
厦门市科技计划项目(3502Z20120015,3502Z20123002)
关键词
钢结构
超薄
膨胀型
水性防火涂料
丙烯酸酯
协效阻燃
steel structure
ultra-thin
intumescent
water-based fire-retardant coating
acrylic ester
synergistic flame retardant effect
