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    • 6. 发明申请
    • Cathodic electrocoating compositions containing an anti-crater agent
    • 含有抗火山口剂的阴极电涂组合物
    • US20060084726A1
    • 2006-04-20
    • US10967491
    • 2004-10-18
    • Allisa GamThomas GraweJoachim RuerupAndreas Fieberg
    • Allisa GamThomas GraweJoachim RuerupAndreas Fieberg
    • C08L63/00B32B27/38
    • C08G18/44C08G18/0823C08G18/581C08G18/8064C08G63/42C08G63/64C08G63/6854C08G63/6954C09D5/4492C09D175/04
    • An improved aqueous cathodic electrocoating composition that contains an anti-crater agent which is a water-reducible polyester resin having an acid value less than 40 mg KOH/g. The water-reducible polyester is the reaction product of (1) a hydroxy cyclic carbonate; (2) a polycarboxylic acid anhydride; (3) optional monofunctional epoxy resin; (4) a polyfunctional epoxy resin; and, (5) a polyamine compound containing tertiary amine and either primary or secondary functionality. The reaction product is neutralized in the presence of acid and water to convert the tertiary amine groups to water-dilutable groups. Hydrolyzable silane groups can also be incorporated into the reaction product to further enhance its crater resistance property. The electrocoat composition produces coatings having a smoother appearance with fewer craters without adversely affecting intercoat adhesion of the cured film to subsequent coating layers applied thereover.
    • 一种改进的含水阴极电泳涂料组合物,其含有抗发泡剂,其是酸值小于40mg KOH / g的水可稀释聚酯树脂。 水可稀释聚酯是(1)羟基环状碳酸酯的反应产物; (2)聚羧酸酐; (3)可选单官能环氧树脂; (4)多官能环氧树脂; 和(5)含有叔胺的聚胺化合物和主要或次要官能团。 将反应产物在酸和水的存在下中和以将叔胺基团转化为水可稀释基团。 可水解的硅烷基也可以加入到反应产物中以进一步提高其耐火山口性。 电泳涂料组合物产生具有更平滑外观的涂层,具有更少的孔口,而不会不利地影响固化膜的涂层附着力到施加到其上的后续涂层。