高附着力高柔韧性水性无机富锌涂料的制备

Preparation of Waterborne Inorganic Zinc-Rich Coating with Excellent Adhesion and Flexibility

采用半连续乳液聚合法,以丙烯酸酯类单体,配以环氧丙烯酸酯、乙烯基硅氧烷功能单体,合成了一种硅丙乳液,以此作为有机成膜物质添加至无机硅酸钾溶液中,与锌粉混合制备高附着力高柔韧性水性无机富锌涂料。通过红外光谱(FT-IR)、透射电镜(TEM)对合成硅丙乳液的形态结构进行表征;利用扫描电镜(SEM)对改性后的杂化涂膜及其富锌涂层的表面形貌进行分析;使用电化学阻抗谱(EIS)测试了富锌涂层的耐腐蚀性。结果表明:经制的硅丙乳液改性后的富锌涂层附着力0级,柔韧性1mm,耐腐蚀性明显提高。

A silicone modified acrylic emulsion has been prepared by using a semicontinuous emulsion polymerization method, with acrylate monomers and other functional monomers of epoxy aciylate and vinyl siloxane, which was added as an organic film-forming material into the inorganic potassium silicate solution, which was then mixed with zinc powder to prepare a waterborne inorganic zinc-rich coatings with excellent adhesion and flexibility. The morphology and structure of the synthesized silicone modified acrylic emulsion were characterized by infrared spectroscopy (FT-IR) and transmission electron microscopy (TEM). The surface morphology of the modified hybrid coatings film and its zinc-rich coating was analyzed l)y scanning electron microscopy (SEM). The corrosion resistance of zinc-rich coatings was tested using electrochemical impedance spectroscopy (EIS). The results showed that the zinc-rich coatings modified by the homemaesilicone modified acrylic emulsion provided the adhesion of rate 0 and flexibility of 1 mm, and the corrosion resistance is obviously improved.