申请人:NIPPON PAINT CO., LTD.
公开号:EP0364958A2
公开(公告)日:1990-04-25
The present invention provides an electrocoating composition comprising a copolymer having both an aminimide group and an amino group, and a modified polyepoxide resin. The electrocoating composition of the present invention comprises;
(A) 10 to 49 % by weight of a vinyl polymer containing at least one amino group and at least one group represented by
wherein R₁ and R₂ respectively represent a hydrogen atom, an alkyl group or an aryl group, R₃ represents an alkyl group or a hydroxyalkyl group, R₂ and R₃ together form a heterocyclic ring having a nitrogen atom, X represents an alkyl group, an aryl group or an aralkyl group, n is an integer of 1 to 4 and m is 0 or 1,
(B) 51 to 90 % by weight of a modified polyepoxide resin containing basic group of 20 to 200 mmol based on 100 g solid content.
本发明提供了一种电涂组合物,该组合物包含一种同时具有氨基亚胺基团和氨基基团的共聚物,以及一种改性聚环氧树脂。本发明的电涂层组合物包括:
(A) 10%至 49%(重量百分比)的乙烯基聚合物,该聚合物含有至少一个氨基和 至少一个由以下方式表示的基团
其中 R₁ 和 R₂ 分别代表氢原子、烷基或芳基,R₃ 代表烷基或羟烷基,R₂ 和 R₃ 共同形成具有氮原子的杂环,X 代表烷基、芳基或芳烷基,n 为 1 至 4 的整数,m 为 0 或 1、
(B) 以 100 克固体含量为基准,含 20 至 200 毫摩尔碱性基团的改性聚环氧树脂的 51%至 90%(重量百分比)。