以豆油、苯甲酸、邻苯二甲酸酐、偏苯三甲酸酐及三羟甲基丙烷为主要原料,采用熔融盐法合成水性醇酸树脂,并用甲基丙烯酸缩水甘油酯(GMA)对其进行改性.通过Fourier变换红外光谱,扫描电子显微镜和差热扫描量热仪等仪器对改性树脂进行表征.结果表明,经GMA改性后的醇酸树脂吸水率明显下降.以GMA改性醇酸树脂为原材料,开发了一种耐水型水性醇酸涂料,其耐盐雾时间可达2000 h.
Waterborne alkyd resin was prepared via molten salt process with soybean oil,benzoic acid,phthalic anhydride,trimellitic anhydride and trimethylolpropane as raw materials,and then modified with glycidyl methacrylate (GMA).The prepared alkyd resin was characterized by FT-IR,DSC and SEM.The result showed that the water absorption of the alkyd resin decreased after GMA modification.A kind of waterproof waterborne alkyd coating was prepared based on GMA modified alkyd resin,which can withstand a long term salt spray test up to 2000 h.
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