摘要
通过桐油、乙二醇之间的酯交换反应,得到了单羟基桐油酸酯。以聚酯多元醇Pol-256、2,4-甲苯二异氰酸酯(TDI)、二羟甲基丙酸(DMPA)、单羟基桐油酸酯为主要原料,制备了一系列的桐油基水性聚氨酯。采用傅里叶变换红外光谱仪(FT-IR)、热重分析仪(TGA)等对产品的结构与性能进行了表征。结果表明:合成的物质为目标产物;经单羟基桐油酸酯封端的水性聚氨酯,提高了单羟基桐油酸酯的含量,固化膜的耐热性能增强,耐水性得到明显的提高,硬度增强,拉伸强度增大,而断裂伸长率却有所降低。
The single hydroxyl eleostearate was obtained by transesterification of tung oil and glycol. Se- ries tung oil - based waterborne polyurethane were synthesized using polyester polyol - 256, 2, 4 - toluene diisocyanate （TDI）, dimethylolpropionic acid （DMPA） and single hydroxyl eleostearate. The structure and properties of products were characterized by Fourier transform infrared spectroscopy （ FT - IR） , thermal gravimetric analysis （TGA） etc. The results showed that the target products were successfully synthesized; the tung oil - based waterborne polyurethane provided higher heat resistance, improved water - resistance, hardness and tensile strength by increasing the content of single hydroxyl eleostearate but the elongation at break was decreased.
出处
《涂料工业》
CAS
CSCD
北大核心
2012年第7期49-52,共4页
Paint & Coatings Industry
基金
湖南省教育厅科学研究项目(09k091)
关键词
桐油
水性聚氨酯
酯交换
tung oil
waterborne polyurethane
transesterification
