Water-soluble UV curable urethane methyl acrylate coating：preparation and properties

Two kinds of water-soluble and ultraviolet (UV) curable oligomers were synthesized and characterized. The oligomers were evaluated as resins for water-based UV curable coating. The rheology of the two oligomers' aqueous so-lutions was investigated in terms of solid fraction, pH dependence, and temperature dependence. The solutions were found to be Newtonian fluid showing rather low viscosity even at high solid fraction of 0.55. The drying process of the coatings and the properties of the cured coatings were studied by comparing them with water-dispersed UV-curable polyurethane methyl acrylate. It was evident that the water-soluble coating dried more slowly; and that the overall properties were inferior to those of the water-dispersed coating.

UV固化聚氨酯丙烯酸酯涂料的研究进展

简要介绍了UV(紫外光)固化涂料的发展历程,阐述了PUA(聚氨酯丙烯酸酯)的合成机制及原料选择;重点综述了3种新型UV固化涂料[如WPUA(水性PUA)、双重固化型PUA和改性PUA等]的研究进展,提出了目前UV固化PUA涂料所存在的不足之处及解决办法。最后对UV固化PUA涂料的发展方向及应用前景进行了展望。

UV固化聚氨酯丙烯酸酯涂料的合成及性能研究

以异佛尔酮二异氰酸酯(IPDI)、新戊二醇(NPG)和季戊四醇三丙烯酸酯(PETA)等为主要原料,采用溶液聚合法合成了PUA(聚氨酯丙烯酸酯)低聚物;然后以此为基体树脂,通过探讨低聚物、活性稀释剂、光引发剂和助剂含量等对涂膜性能的影响,优选出制备UV(紫外光)固化PUA涂料的最佳工艺条件。研究结果表明:当w(PUA低聚物)=57%、w(活性稀释剂)=35%和w(光引发剂)=6%(均相对于涂料质量而言)时,该涂料具有相对较好的综合性能,其UV辐照50 s后即可固化,相应胶膜的硬度为3H、柔韧性为3 mm、附着力为1级且具有较高的耐热性。

UV固化水性漆地板的开发

为了开发UV固化水性漆地板,在分析当前水性漆地板存在问题的基础上,有针对性地提出解决措施,包括水性漆筛选、地板用树种筛选、涂装工艺优化等。以优化工艺制备的水性漆地板试样,按LY/T 1859—2009《仿古木质地板》和Q/YFL 0035—2018《水性光固化(UV)漆木地板》进行性能测试,其表面耐磨≤0.15 g/100r,漆膜硬度≥H;漆膜附着力1级~2级;TVOC≤200 ug/m^3。