木塑复合材料表面防火涂层制备及其耐火性能  

Preparation and Fire Resistance of Fire-retardant Coating on the Surface of Wood Plastic Composites

作　　者：方露[1] 李大纲[1] 施迎春 王玉梅[3] 林东亮[3] 

机构地区：[1]南京林业大学木材工业学院,江苏南京210037 [2]湖州美典新材料有限公司,浙江湖州313000 [3]惠东美新塑木型材制品有限公司,广东惠州518102

出　　处：《塑料工业》2011年第9期112-115,共4页China Plastics Industry

基　　金：江苏高校优势学科建设工程资助项目(PAPD);江苏省苏北技术创新引导资金(BN2008054)

摘　　要：以丙烯酸树脂为基体,聚磷酸铵(APP)、三聚氰胺(MEL)和季戊四醇(PER)构成的膨胀型阻燃剂为阻燃体系,制备了用于木塑复合材料表面的防火涂层。采用正交试验法优化了防火涂层的配方,考察了涂层厚度对耐燃时间的影响,研究了涂层的阻燃机理。结果表明:当APP、MEL和PER按质量比12∶7∶4进行复配时,阻燃效果最佳,耐燃时间达到1 500 s;一定范围内,耐燃时间随涂覆质量呈二次增长,但过厚也会出现"桔皮"、"针孔"等缺陷。防火涂层通过形成致密的炭层对基材进行保护,完全燃烧后的产物主要为无机炭骨架及少量磷酸盐类物质。The fire-retardant coating for wood plastic composites （WPC） was prepared using acrylic resin as binder, ammonium polyphosphate （APP）, melamine （MEL） and pentaerythritol （PER） as flame retardants. The best ratio was optimized by the method of orthogonal test and the effect of coating thickness on the retardant time was inspected, the mechanism of coating was also studied. When APP, MEL and PER mixed at a ratio of 12：7：4, the best performance with retardant time 1 500 s reaches. Although the retardant time increased with the coating thickness in quadratic curves, lots of defects such as ＂orange peel＂, ＂pinhole＂ appeared when too thick. The WPC was protected by the char layer formed by the coating during the burning stage and finally there were only inorganic carbon skeleton and small amounts of phosphate kind material left.

关 键 词：木塑复合材料 防火涂层 正交试验 耐燃时间 

分 类 号：TB332[一般工业技术—材料科学与工程]