聚醚多元醇合成封端型水性聚氨酯乳液

Synthesis of waterborne blocked polyurethane emulsion based on polyether polyols

以聚醚三元醇和甲苯二异氰酸酯(TDI)为基本原料,异丙醇为稀释剂,亚硫酸氢钠为封端剂制得水性聚氨酯。分析并讨论预聚温度和时间、R值、封端剂用量、封端温度及时间等因素对水性聚氨酯性能的影响。

Using polyether triol and toluene diisocyanate as the basic raw materials, isopropanol as the diluent and sodium bisulfite as the blocking agent, the waterborne blocked polyurethane emulsion was synthesized. And the effects of isocyanate index （R value）, temperature and time ofprepolymerization, blocking agent amount and temperature and time of blocking on the properties of blocked waterborne polyurethane emulsion were analyzed and discussed.