高装饰型底面合一水性金属烤漆的制备与性能研究

Preparation and Properties of High Decorative Waterborne Metal Baking Paint

随着减排形势日益严峻、高效涂装需求日益增长,高装饰型、底面合一型水性金属烤漆越来越受到涂料、涂装企业的青睐。本研究选取水性丙烯酸分散体、水性醇酸分散体、水溶型醇酸4款水性树脂进行金属烘烤涂料的制漆及性能研究。其中,水性醇酸分散体A03体系可获得环保性好、综合性能最优的水性金属烤漆。所得涂层的20°光泽大于90%,鲜映性Gd值大于0.88,铅笔硬度2 H,耐盐雾时长600 h,涂装VOC排放低于100 g/L,可满足中等腐蚀环境下的金属基材的装饰与防护。

The increasing strict regulations of emission reduction and the increasing demand on high effective coating process lead to the good development of high decorative waterborne metal baking paints having the balanced performance of primer and topcoat. In this article, four types of waterborne resins including acrylic dispersion, alkyd dispersion and alkyd resin, etc. are used to prepare metal baking paints. Meanwhile, their properties have been investigated. The results show that the metal baking paint based on the waterborne alkyd dispersion A03 exhibits the optimal comprehensive properties with its gloss more than 90% （20°）, DOI more than 0.88, pencil hardness 2H, salt fog resistance 600 h, VOC less than 100 g/L, which can be applied to protect and decorate the metal substrates in middle level of corrosion environment.