Novel sealing agent and preparation method thereof

The invention provides a novel sealing agent and a preparation method thereof. The novel sealing agent is prepared from the following raw materials in parts by weight: 10 to 15 parts of nano silicon dioxide, 15 to 20 parts of water-soluble silane polymer, 10 to 15 parts of modified limestone, 20 to 25 parts of waterborne polyurethane dispersion, 50 to 70 parts of water, 10 to 20 parts of modifier, 1 to 5 parts of coalescing agent and 1 to 5 parts of surfactant. The novel sealing agent is good in corrosion resistance, high in adhesive force and good in application prospect. 本发明提供了一种新型封闭剂及其制备方法，所述新型封闭剂包括以下重量份的原料：纳米二氧化硅10-15份、水溶性硅烷聚合物15-20份、改性石灰石10-15份、水性聚氨酯分散体20-25份、水50-70份、改良剂10-20份、成膜助剂1-5份、表面活性剂1-5份。所述新型封闭剂的耐腐蚀性能好、附着力强，具有良好的应用前景。