阴离子型水性聚氨酯和阳离子型水性聚氨酯的合成及分析  

Preparations and Analysis of Cationic and Anionic Waterborne Polyurethane

作　　者：张伟[1] 邢凤荣 李雪 

机构地区：[1]中国石油天然气管道局天津设计院,天津300457

出　　处：《现代涂料与涂装》2012年第5期7-10,共4页Modern Paint & Finishing

摘　　要：以甲苯二异氰酸酯(TDI)和聚酯二醇等为基本原料,在NCO/OH比例及反应物量相同的情况下,分别合成了阴离子型水性聚氨酯和阳离子型水性聚氨酯。对它们进行了红外光谱分析、热重分析、粒径分析、吸水率测定和力学测试。结果表明:合成的阴离子水性聚氨酯无残余的—NCO,粒径、吸水率小于阳离子型水性聚氨酯,拉伸强度、断裂伸长率大于阳离子型水性聚氨酯,耐水性强于阳离子型水性聚氨酯。Anionic and cationic waterborne polyurethane were synthesized by using the same amount of toluene diisocyanate and polyester glycol as raw materials under the same mole ratio of NCO/OH. These two waterborne polyurethanes were characterized by FTIR, TGA, particle size analysis, water absorption rate test and mechanical properties test. The results showed that there was no residual --NCO in anionic waterborne polyurethane, and it had smaller particle size, lower water absorption rate, larger tensile strength, larger breaking elongation, and bet- ter water resistance than cationic waterborne polyurethane.

关 键 词：异氰酸酯 阴离子型水性聚氨酯 阳离子型水性聚氨酯 

分 类 号：TQ633[化学工程—精细化工]