申请人:Herberts Gesellschaft mit beschraenkter Haftung
公开号:US04623690A1
公开(公告)日:1986-11-18
A cathodically precipitable aqueous electro-dipcoating agent which includes as Component A, 50 to 99% by mass (relative to the total quantity of Components A and B) of a synthetic resin binder having tertiary amino groups and hydroxyl groups which can be rendered water soluble by protonation with acids, and which (a) has an amine number of 35 to 120, (b) has a hydroxyl number of 50 to 400, (c) has substantially no primary, secondary and quaternary amino groups, (d) has substantially no free isocyanate groups, and (e) has substantially no blocked isocyanate groups which can react at baking temperatures of up to 200.degree. C. with hydroxyl groups present in the reaction components. The agent also includes as Component B, 1 to 50% by mass (relative to the total quantity of Components A and B) of substantially non-acid synthetic resins having at least two terminal esterified carboxyl groups which can react under normal lacquer baking conditions with Component A, accompanied by cross-linkage.
一种阴极沉淀水性电泳涂料剂,其中组分A包括50至99%的合成树脂粘合剂(相对于组分A和B的总量),该合成树脂粘合剂具有第三级氨基和羟基,可以通过酸质子化而变为水溶性,并且(a)胺值为35至120,(b)羟值为50至400,(c)基本上没有一级、二级和季铵基,(d)基本上没有自由异氰酸酯基,(e)基本上没有被阻断的异氰酸酯基,可以在烘烤温度高达200°C时与反应组分中存在的羟基反应。该剂还包括组分B,占组分A和B总量的1至50%的基本上非酸性合成树脂,其至少具有两个端部酯化的羧基,可以在正常的漆烘烤条件下与组分A反应,并伴随着交联。