蓖麻油聚氨酯防水涂料的制备与性能研究

Study on Preparation and Property of Castor Oil-Based Polyurethane Waterproof Coatings

采用可再生的蓖麻油先分别与三羟甲基丙烷（TMP）、甘油反应，再与TDI反应，生成端基为-NCO的蓖麻油基聚氨酯预聚体。对其-NCO含量进行测试，并采用FT-IR对材料进行定性分析。并对固化后的涂膜附着力、力学性能、耐磨性和耐水性能进行了测试。结果表明：采用甘油醇解蓖麻油合成的聚氨酯性能较好，其最佳反应时间为3～4h，反应后-NCO含量为4．90％-5．32％，体系在-10～40℃能固化成膜，且成膜物有较好的防水性能和力学性能。

the castor oil - polyurethane prepolymer with terminal --NCO group were synthesized from re- newable castor oil, trimethylolpropane, glycerin and TDI as raw materials. The --NCO content of the pre- polymer were tested. The structure of materials were characterized by FT - IR. The film adhesion, mechani- cal performance, waterproof property and abrasion resistance were also tested. The results indicates that when the --NCO content of castor oil - polyurethane prepolymer ranges from 4. 90% ~ 5.32% , the system can be cured at -10 -40 ℃ ,with good waterproof and mechanical properties.