合成革用非离子水性聚氨酯的合成与改性研究

Synthesis and Modified of Nonionic Waterborne Polyurethane for Synthetic Leather

以丙烯酸丁酯为稀释剂,甲苯二异氰酸酯(TDI)、聚丙二醇(PPG)、聚乙二醇(PEG)为基本原料,乙二醇(EG)为扩链剂,甲基丙烯酸羟乙酯(HEA)为封端剂,合成了丙烯酸酯改性非离子水性聚氨酯粘合剂乳液。结果显示:当预聚温度和时间分别为70℃和2h,扩链的温度和时间分别为70℃和3h,PEG用量为30%时,改性的乳液具有优良的性能。此外,改性产品的粘合强度略微下降,耐水性增强,平均粒径增大,热稳定性显著提高。

In this paper, a non - ionic waterborne polyurethane adhesive was synthesized, which used butyl acrylic （BA） as diluents monomer, toluene diisocyanate （TDI）, propylene glycol（PPG）, polyether glycol（PEG） as basic raw materials, ethylene glycol （EG） as chain extension, hydroxyethyl methacrylate （HEA） as the end capping agent. The experiment results show that when the temperature and time of prepolymerization is 70~C and 2 hours, the temperature and time of chain extension is 70~C and 3 hours, the amount of PEG content is 30%, the modified emulsion has excellent performance. In addition, the bond strength of modified product slightly decreases, the water resistance increases, the average particle size becomes larger and the thermal stabil- ity is obviously improved.