| 低温固化环氧阴极电泳涂料的制备 |
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| 引用本文： | 张红凤,高军,高晓涵,林立.低温固化环氧阴极电泳涂料的制备[J].电镀与涂饰,2012,31(2):53-56. |
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| 作者姓名： | 张红凤 高军 高晓涵 林立 |
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| 作者单位： | 1. 山东科技大学化学与环境工程学院,山东青岛,266510
2. 山东大学化学与化工学院,山东济南,250100 |
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| 摘 要： | 采用乙二醇单丁醚和甲乙酮肟对甲苯二异氰酸酯(TDI)进行全封闭,并将其加入到二乙醇胺改性的环氧树脂乳液中进行混合搅拌,制备了一种低温固化环氧阴极电泳涂料。研究了封闭反应温度、TDI用量和接枝反应温度对漆膜性能的影响,确定了适宜的工艺条件:甲乙酮肟封闭反应温度为40°C,接枝反应温度80°C,TDI质量分数为15%左右。在此条件下制备的漆膜可以在150°C/30min的条件下固化,所得漆膜厚度20μm,光泽70°,附着力1级,柔韧性1mm,铅笔硬度3H,冲击强度>50kg.cm,耐水性>800h,达到设计要求。
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| 关 键 词： | 阴极电泳涂料 环氧树脂 低温固化 柔韧性 |
Preparation of epoxy cathodic electrophoretic coating curable at low temperature |
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| ZHANG Hong-feng
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GAO Jun
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GAO Xiao-han
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LIN Li.Preparation of epoxy cathodic electrophoretic coating curable at low temperature[J].Electroplating & Finishing,2012,31(2):53-56. |
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| Authors: | ZHANG Hong-feng GAO Jun GAO Xiao-han LIN Li |
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| Affiliation: | College of Chemical and Environmental Engineering,Shandong University of Science and Technology,Qingdao 266510,China |
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| Abstract: | A low-temperature curable epoxy cathodic electrophoretic coating were synthesized,for which toluene diisocyanate(TDI) completely blocked by ethylene glycol monobutyl ether and ethyl methyl ketone oxime was mixed while agitating with a diethanolamine-modified epoxy resin emulsion.The influence of blocking reaction temperature,TDI dosage,and grafting reaction temperature on coating performance was studied.The suitable process conditions were determined as follows:blocking reaction temperature 40 °C,grafting reaction temperature 80 °C,and TDI mass fraction ca.15%.The coating obtained under the above conditions can be cured at 150 °C for 30 min,and the cured coating has a thickness of 20 μm,luster 70°,adhesion strength 1 grade,flexibility ≤1 mm,pencil hardness 3H,impact strength >50 kg.cm,and water resistance >800 h,meeting the desired requirement. |
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| Keywords: | cathodic electrophoretic coating epoxy resin low temperature curing flexibility |
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