Abstract: A series of novel urethane-modified fatty amine used as waterborne epoxy curing agents based on oil and fat were prepared from polyamines and isocyanate group-terminated prepolymer synthesized from fatty alcohol polyoxyethylene ether (OE-6) and toluene diisocyanate (TDI).The optimum reaction conditions of prepolymer were as follows：the mixture of TDI and OE-6 in molar ratio 1.05∶1，at 45 ℃ for 2.5 h. The condition of polyamines extending chains were as follows：the mixture of polyamine and oligomers in molar ratio 1.2∶1，reaction temperature 40 ℃. After 3 h most of solvent was removed from the adduct，distilled water was continuously added to the adduct at 50—60 ℃ until solids content becomes 50%—55%，then urethane-modified fatty amine was synthesized. The structure of the product was characterized by FT-IR and 13C-NMR. The particle size analysis suggested that it could emulsify liquid epoxy resin. The properties of the two-component film of the urethane-modified fatty amine and liquid epoxy resin were measured，with flexibility 1mm，pencil hardness 3H，impact resistance 50 kg/cm.

摘要： 以高级脂肪醇聚氧乙烯醚（OE-6）、甲苯二异氰酸酯（TDI）为原料，物料比n(TDI)∶n(OE-6)= 1.05∶1、温度45℃、反应2.5 h合成了端异氰酸酯预聚体，再将其与多元胺按照摩尔比n (多元胺)∶n (预聚体)=1.2∶1、温度40℃、反应3 h扩链，得到油脂基聚氨酯改性脂肪胺水性环氧固化剂（UFAWECAOF）。用红外光谱、 13C-NMR表征了UFAWECAOF的结构。粒径分析表明目标产物具有乳化液体环氧树脂的功能，其与环氧树脂EPON828复配制备的双组分水性涂料涂膜固化物，柔韧性达1 mm、铅笔硬度达3 H、耐冲击性达50 kg/cm。