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
Modern Paint & Finishing(2012)
Abstract
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。
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Key words
cationic waterborne polyurethane,diisocyanate,anionic waterborne polyurethane
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