水性环氧树脂膨胀型防火涂料的制备及性能研究  

Preparation and performance of waterborne epoxyresin intumescence fire retardant coatings

作　　者：孙鹏 崔凯圆 张诚[1] 欧阳密[1] SUN Peng;CUI Kaiyuan;ZHANG Cheng;OUYANG Mi(College of Chemical Engineering,Zhejiang University of Technology,Hangzhou 310014,China)

机构地区：[1]浙江工业大学化学工程学院,杭州310014

出　　处：《功能材料》2023年第7期7193-7199,7220,共8页Journal of Functional Materials

基　　金：国家自然科学基金项目(52073257);浙江省重点研发计划项目(2021C04021);衢州市科技计划项目(2021NC14)。

摘　　要：研究了水性环氧树脂膨胀型防火涂料配方中各组分及其添加量(质量分数/%)对涂层防火性能的影响;对膨胀型阻燃剂(IFR):聚磷酸铵(APP)、三聚氰胺(MEL)、季戊四醇(PER)进行了正交试验并对膨胀石墨(EG)进行了单因素变量实验。采用TG-DTG、DSC和FT-IR等手段分析研究了防火涂料的热稳定性及燃烧后的炭层组分,得到优化的防火涂料配方。结果表明,选用水性环氧树脂复配(m(E51)∶m(E20)=3∶2)为成膜物质,膨胀型阻燃剂和膨胀石墨的添加量分别为ω(APP)=26%、ω(MEL)=12%、ω(PER)=10%、ω(EG)=4%时涂层的极限耐火时间可达到31.7 min,膨胀倍率11.7倍,膨胀炭层完整、致密;防火涂料最大分解速率对应的温度为331.4℃,膨胀型阻燃剂在200~350℃间完成分解,800℃时残碳量为49.9%,主要由聚芳环、磷酸酯类有机化合物及焦磷酸钛等无机物构成。添加钛白、氢氧化镁及矿物纤维能有效提高涂层的防火性能和膨胀炭层的强度。The effect of each component and its additive amount(mass fraction/%)on the fire resistance of waterborne epoxy resin intumescence fire retardant coating were studied.For intumescent flame retardant(IFR):the orthogonal experiment of ammonium polyphosphate(APP),mela mine(MEL),pentaerythritol(PER)and the single factor variable experiment of expanded graphite(EG)were carried out.TG-DTG,DSC and FT-IR were used to analyze and study the thermal stability of fire retardant coating and the composition of the carbon layer after combustion,and the optimized fire retardant coating formula was obtained.The results show that the waterborne epoxy resin(m(E51)∶m(E20)=3∶2)was used as the film for ming material,when the additive amounts of intumescent flame retardant and expanded graphite were 26%(APP),12%(MEL),10%(PER)and 4%(EG),respectively,the ultimate refractory time of the coating reached 31.7 min,the expansion rate was 11.7,and the expanded carbon layer was complete and dense.The temperature corresponding to the maximum decomposition rate of fire retardant coating is 331.4℃,the intumescent flame retardant in 200-350℃to complete the decomposition,800℃residual carbon content is 49.9%,mainly composed of polyaromatic rings,phosphate organic compounds and titanium pyrophosphate inorganic compounds.The addition of titanium dioxide,magnesium hydroxide and mineral fiber can effectively improve the fire resistance and the strength of the expanded carbon layer.

关 键 词：水性环氧树脂 膨胀型防火涂料 极限耐火时间 膨胀倍率 耐火温度 

分 类 号：TQ637.8[化学工程—精细化工]