微胶囊化聚磷酸铵在防火界面剂中的应用研究

Application of micro-capsulated ammonium polyphosphate in fireproof interface agent

为提高防火阻燃界面剂的性能,通过原位聚合的方法,采用三聚氰胺甲醛树脂(MF)为囊壁材料对防火阻燃界面剂组分聚磷酸铵(APP)进行了微胶囊化。以预聚体溶液p H值,MFAPP合成过程中的固化温度、固化时间为控制因素,通过正交试验制备出MFAPP。通过MFAPP溶水后的水溶性馏分、表面张力系数和耐碱性测试,并结合热重、扫描电镜和能谱等方法,确定具有最佳包裹率的聚磷酸铵制备条件为:p H值8.5、固化温度80℃、固化时间2 h。浆体流变性能和拉伸粘结强度试验结果表明,与采用APP相比,以MFAPP为阻燃组分制备的防火阻燃界面剂浆体的工作性能更好,拉伸粘结强度符合JG 149—2013标准要求。

In order to improve the properties of fireproof interface agent, ammonium polyphosphate （APP）, which is one of the fireproof interface agent components,was microcapsulated by means of in-situ polymerization, coated with melamine-formaldehyde resin. Solution pH in the process of prepelymerization, solution temperature and reaction time in the process of MFAPP synthesis were used as controlling factors to design orthogonal experiment and MFAPP was synthesized as a result. Determination of water soluble MFAPP,surface tension coefficient in water solution,alkali resistance about MFAPP in alkali solution,through analysis of thermogravimetric analysis （rIGA）, scanning electron microscope and energy spectrometer. The result indicated that when pH is 8.5, solution temperature is 80 ~C,reaction time is 2 hours,APP would have the best encapsulation rate. Rheological properties test of slurry and r^ults of tensile adhesive strength test showed that the workability were better and tensile adhesive strength can meet the demand when MFAPP was use in fireproof interface agent,the bond strength can meet the requirement of standard of JG 149---2013.