氨基硅油扩链改性水性聚氨酯的研究

通过将由甲苯二异氰酸酯与聚四氢呋喃，二羟甲基丙酸反应制得的聚氨酯预聚体在低浓度氨基硅油的水乳液中扩链，合成了一种硅氧烷改性的聚氨酯水乳液，并用傅立叶红外光谱，ＥＳＣＡ能谱，接触角仪，电子拉力试验机，吸水率测定及乳液稳定性测试对其进行研究。

Studies of Waterborne Polyurethane Modified with Amino Silicone

The polyurethane prepolymer which was based on 2,4-toluene diisocyanate (TDI), poly (tetramethylene oxide) (PTMO) and dimethylol propionic acid (DMPA) was extended in amino silicone emulsion to synthesize a kind of siloxane-modified waterborne polyurethane. The properties of the polyurethane were investigated using infrared spectroscopy (FTIR), electron spectroscopy for chemical analysis (ESCA), tensile and contact angle measurements, water absorption and emulsion stability test. It was shown that the PU emulsion was stable and the siloxane chains enriched on the PU surface. The water resistance of PU film increased and the bulk tensile properties of the PU film was not changed significantly with the siloxane-modification.