Intended for preparing silane-modified waterborne polyurethane dispersions and then applying them to the development of environmentally friendly nail enamels, the synthesis mechanism was investigated in this paper to determine the optimal technological parameters. Aimed at the synthesis of waterborne polyurethane dispersions, a one-step method was conducted on the prepolymers and the main raw materials, isophorone diisocyanate (IPDI), polycaprolactone diol (PCL), 1,4-butanediol (BDO), 2,2-dimethylol butyric acid (DMBA), (3-aminopropyl) triethoxysilane (APTES), triethylamine (TEA) and solvent water, were adopted. Subsequently, the water-based nail enamel together with its dry film was prepared by pigments and functional additives. Morphological characteristics and chemical composition of dry film of nail enamel were characterized by using atomic force microscopy (AFM) and Fourier transform infrared spectroscopy (FTIR). The crystallinity of film was analyzed by an X-ray diffractometer (XRD). Benefiting from a thermogravimetric analyzer (TG) and differential thermal analyzer (DSC), the thermal properties of the prepared film were characterized. The hardness, adhesion, glossiness, water absorption, drying time and some other indicators of the water-based nail enamel were tested using a loading pencil hardness tester and other equipment. The experimental results showed the waterborne polyurethane modified by silane coupling agent exhibited favorable film-forming property, glossiness, flexibility, hardness, and adhesion and can be used for developing the environmentally friendly water-based nail enamel with a concentration of silane coupling agent of 1.5%, showing a broad market prospect in the cosmetics field.

为了制备硅烷改性的水性聚氨酯分散体，然后将其应用于环保型指甲油的开发，本文研究了其合成机理，以确定最佳的工艺参数。针对水性聚氨酯分散体的合成，对预聚物和主要原料异佛尔酮二异氰酸酯（IPDI），聚己内酯二醇（PCL），1,4-丁二醇（BDO），2,2-采用二羟甲基丁酸（DMBA），（3-氨基丙基）三乙氧基硅烷（APTES），三乙胺（TEA）和溶剂水。随后，通过颜料和功能添加剂制备水性指甲油及其干膜。利用原子力显微镜（AFM）和傅里叶变换红外光谱（FTIR）对指甲釉干膜的形貌特征和化学组成进行了表征。通过X射线衍射仪（XRD）分析膜的结晶度。得益于热重分析仪（TG）和差热分析仪（DSC），对制得的薄膜的热性能进行了表征。水性指甲油的硬度，附着力，光泽度，吸水率，干燥时间和其他一些指标使用装载铅笔硬度计和其他设备进行了测试。实验结果表明，硅烷偶联剂改性的水性聚氨酯具有良好的成膜性，光泽度，柔韧性，硬度，