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发明公开
CN103635547A 可涂装至狭窄的间隙部的阳离子电沉积涂料组合物及使用其的电沉积涂膜形成方法 有权

可涂装至狭窄的间隙部的阳离子电沉积涂料组合物及使用其的电沉积涂膜形成方法
摘要：
本发明提供一种在被涂物的狭窄间隙的内部也显示优异的涂膜析出性的电沉积涂料组合物及电沉积涂膜形成方法。所述阳离子电沉积涂料组合物在水性介质中分别含有特定量的阳离子性环氧树脂、封端多异氰酸酯固化剂、SP值比阳离子性环氧树脂低0.6～1.0的疏水剂、粘度调节剂及中和酸，所述阳离子电沉积涂料组合物的库仑效率为2.0～2.5mg/(μm·C)。所述电沉积涂膜形成方法进一步使用所述阳离子电沉积涂料组合物，电压的升压速度为30～70V/10秒。
摘要（英）：

The present invention addresses the problem of providing: an electrodeposition paint composition that exhibits excellent paint-film deposition properties even in the interior of narrow spaces in the object subjected to painting; and an electrodeposition paint-film formation method. This problem is solved by providing a cationic electrodeposition paint composition containing specified amounts of the following in an aqueous medium: a cationic epoxy resin, a blocked polyisocyanate hardening agent, a hydrophobic agent having an SP value that is 0.6-1.0 lower than that of the cationic epoxy resin, a viscosity control agent, and a neutralizing acid. Therein, the coulombic efficiency of the cationic electrodeposition paint composition is 2.0-2.5 mg/([mu]m*C). Furthermore, the electrodeposition paint-film formation method uses the cationic electrodeposition paint composition, and has a voltage boost speed of 30-70 V/10 seconds.

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