Modified layered nano clay sheet/polyurethane composite coating and preparation method thereof

The invention discloses a modified layered nano clay sheet/polyurethane composite coating and a preparation method thereof, and belongs to the technical field of coatings. The preparation method comprises the following steps: preparing a modified layered nano-clay sheet/polyurethane composite coating from modified layered nano-clay sheets and polyurethane by adopting a physical cross-linking method; wherein the modified layered nano-clay sheet is prepared by sequentially carrying out acid activation and surface modification treatment on nano-clay. The problems that an existing polyurethane coating is insufficient in weather resistance and adhesion and poor in storage stability are solved, and the cost is reduced. In addition, the modified layered nano clay sheet/polyurethane composite coating prepared by the invention has excellent corrosion resistance and mechanical properties. 本发明公开了一种改性层状纳米粘土片/聚氨酯复合涂料及其制备方法，属于涂料技术领域；即，将改性层状纳米粘土片与聚氨酯采用物理交联法来制备改性层状纳米粘土片/聚氨酯复合涂料；其中，所述改性层状纳米粘土片为将纳米粘土依次进行酸活化和表面改性处理制备得到。本发明解决了现有