以甲苯二异氰酸酯（TDI）、聚氧化丙烯二醇（PPG）、2，2-二羟甲基丙酸（DMPA）、异佛尔酮二胺（IPDA）及N-（β-氨乙基）-γ-氨丙基三甲氧基硅烷（KH-792）等为主要原料，制备可水分散性聚氨酯（PU）树脂，用PU树脂配制水性塑料印刷油墨。通过红外光谱对PU分子结构进行表征，研究KH-792用量对PU树脂热稳定性能、黏度、力学性能、耐水性能及其所配制油墨性能的影响。结果表明：随着KH-792用量的增加，PU树脂的初始热降解温度、热失重残炭率、黏度、拉伸强度和拉断伸长率均逐渐提高，吸水率先减小后增大，所配制油墨的黏度逐渐增大，细度先减小后增大，附着牢度、存储稳定性和耐水煮性能先提高后降低。当KH-792用量为10%时，PU树脂及所配制油墨的综合性能最优。

Water-dispersible polyurethane (PU) resins were prepared with toluene diisocyanate (TDI), polyoxypropylene glycol (PPG), 2,2-dimethylol propionic acid (DMPA), isophorone diamine (IPDA) and N-(β-aminoethyl)-γ- aminopropyltrimethoxysilane (KH-792) as the main raw materials. Waterborne plastic printing inks is formulated using PU resin. The molecular structure of PU was characterized by infrared spectroscopy. The effects of KH-792 content on the thermal stability, viscosity, mechanical properties, water resistance and ink properties of PU resin were studied. The results showed that with the increase of KH-792 content, the initial thermal degradation temperature, the carbon residual rate of thermal weight loss, viscosity, tensile strength and elongation at break of PU resin increased gradually, and the water absorption first decreased and then increased. With the increase of KH-792 content, the viscosity of the prepared ink increased gradually, the fineness decreased first and then increased, and the adhesion fastness, storage stability and boiling resistance increased first and then decreased. When the amount of KH-792 was 10%, the comprehensive performance of PU resin and its ink was the best.