以可再生资源为原料的环氧-非异氰酸酯聚氨酯杂化涂料的制备

摘要

采用可再生资源环氧大豆油(ESBO)作为原料与二氧化碳反应合成环碳酸酯基大豆油(CSBO),再通过CSBO与乙二胺及二乙烯三胺分别反应制备非异氰酸酯聚氨酯(NIPU)预聚体；以其作为固化剂与环氧树脂E-51反应制备环氧-非异氰酸酯聚氨酯杂化涂膜.通过FT-IR对NIPU预聚物结构进行分析,证明了聚氨酯特征基团氨基甲酸酯键的生成；所制备的清漆涂膜综合性能优良,对比纯环氧体系,其耐化学性、耐磨性能更优异；同时其制备过程中不使用有毒性的异氰酸酯,安全环保.%The cyclic carbonate soybean oil(CSBO) was prepared by using the renewable resources soybean oil and carbon dioxide,then the non-isocyanate polyurethane(NIPU) prepolymer with the amino was systhesised by the reaction between the CSBO and the ethylene diamine and diethylene triamine respectively.The epoxy-NIPU hybrid coating was prepared by using NIPU as the curing agent and epoxy resin.The formation of urethanes group,the characteristic group of PU,was verified by FT-IR analysis.The hybrid coating showed high performance,especially the excellent chemical resistance and wear resistance.The preparation process was safe and environment frendily,as no use of the toxic isocyanate.