摘要
采用蓖麻油(C.O.)、甲苯二异氰酸酯(TDI)和二羟甲基丙酸(DMPA)反应合成了水性聚氨酯(WPU)分散体,研究了n(—NCO)/n(—OH)、DMPA含量对聚氨酯乳液及涂膜性能的影响.实验表明:当n(—NCO)/n(—OH)为2.2∶1,DMPA添加量为7.0%,反应温度为70℃,乳化温度为30℃时合成的水性聚氨酯涂料具有优良的成膜性、较高的硬度、良好的柔韧性和较好的疏水性.
Waterborne polyurethane （WPU） was prepared by the reaction of castor oil （C. O. ） with dimethoxypropionic acid （DMPA） and toluene diisocyanate （TDI）. The effects of molar ratios of --NCO to --OH and DMPA content on the properties were investigated. The result showed that the castor oil based waterborne polyurethane had excellent film-forming property, high hardness, excellent fallibility and good resistances to water. The best experiment conditions were as follows：molar ratio of n（-- NCO）/n（--OH） was 2.2, DMPA content was 7.0 %, the temperatures of reaction and emulsification stage were 70 and 30 ℃, respectively.
出处
《武汉工程大学学报》
CAS
2010年第3期79-81,110,共4页
Journal of Wuhan Institute of Technology
关键词
蓖麻油
水性聚氨酯
水性涂料
castor oil
waterborne polyurethane
waterborne coating
