Abstract:
The cratering behavior of two-component water- borne polyurethane coatings(2K-WPU) might give a negative influence on the film appearance and other performance. In this article, the effect of viscosity, drying time, pigments and additives(e.g, defoaming agent,leveling agent and wetting agent)on cratering behavior of the cured film has been investigated.The methods effectively controlling the cratering behavior are provided thereby.
Key words:
two-component waterborne polyurethane coatings,
cratering behavior,
surface tension
摘要： 双组分水性聚氨酯涂料在应用过程中的涂膜缩孔问题会影响涂膜的使用性能和美观。研究并分析了双组分水性聚氨酯涂料（2K-WPU）的施工黏度、熟化时间以及所用颜料、助剂（如消泡剂、流平剂、基材润湿剂）等对涂膜缩孔的影响，提出了控制涂膜缩孔的有效方法。
关键词:
双组分水性聚氨酯涂料,
涂膜缩孔,
表面张力
Liu Changchun, Wei Ruijin, Wu Chunying, Huang Chunhu, Li Huining, Cao Derong. Cratering Behavior of Two-Component Waterborne Polyurethane Coatings[J]. Paint & Coatings Industry, 2016, 46(5): 49-53.
刘长春１, 魏瑞金１, 吴春莹２, 黄春辉３, 李会宁２, 曹德榕１. 双组分水性聚氨酯涂料涂膜缩孔的研究[J]. 涂料工业, 2016, 46(5): 49-53.