Defoaming type super wetting agent for water-based coating and preparation method of defoaming type super wetting agent

The invention discloses a defoaming type super wetting agent for a water-based coating and a preparation method of the defoaming type super wetting agent, the defoaming type super wetting agent is a star-shaped symmetrical nonionic surfactant, the nonionic surfactant is an organosilicon block copolymer beta-CD-g-PDMS-b-Y, and Y is a water-soluble polymer. The defoaming type super wetting agent not only has the capability of reducing interfacial tension of a micromolecular surfactant, but also has interfacial stability and excellent wetting performance. In addition, the preparation process of the defoaming type super wetting agent is simple, the production process is simplified, and the industrial batch process is promoted. 本发明公开了一种用于水性涂层的消泡型超级润湿剂及其制备方法，其为星状对称型的非离子型表面活性剂，所述非离子型表面活性剂为有机硅嵌段共聚物β-CD-g-PDMS-b-Y，其中，Y为水溶性聚合物。该消泡型超级润湿剂既具有小分子表面活性剂降低界面张力的能力，又具有界面稳定性能，具有优异的润湿性能。此外，该消泡型超级润湿剂的制备工艺简单，简化了生产过程，推动了工业化批量进程。