An aqueous vinyl-modified epoxy resin composition of the invention comprises: an aqueous composition comprising a modified epoxy resin (A) that is neutralized with a basic compound and dispersed or dissolved in water, wherein the modified epoxy resin (A) is obtained by copolymerizing a polymerizable unsaturated group-containing modified epoxy resin (a) and a vinyl monomer (b) comprising at least a carboxyl group-containing vinyl monomer (b-1), wherein the polymerizable unsaturated group-containing modified epoxy resin (a) is obtained by a reaction among (a-1) an epoxy resin comprising at least an aromatic epoxy resin (a -11), (a-2) a glycidyl group-containing vinyl monomer, and (a-3) an amine, and optionally (a-4) a component capable of reacting with the components (a-1) to (a-3); and a water-miscible crosslinking agent (B). The aqueous vinyl-modified epoxy resin composition of the invention can provide a coating film that has high resistance to harsher environment, such as resistance to brake fluids.
本发明的
乙烯基改性环氧
树脂水性组合物包括一种
水性组合物,包含一种用碱性化合物中和并分散或溶解在
水中的改性环氧
树脂(A),其中改性环氧
树脂(A)是通过共聚一种可聚合的含不饱和基团的改性环氧
树脂(a)和一种至少包含一种含羧基的
乙烯基单体(b)而得到的、其中,可聚合的含不饱和基团改性环氧
树脂(a)是由以下物质反应得到的:(a-1) 至少包括芳香族环氧
树脂(a-11)的环氧
树脂,(a-2) 含
缩水甘油基团的
乙烯基单体,(a-3)
氨基,以及可选的(a-4) 能与组分(a-1)至(a-3)反应的组分;和一种
水溶性
交联剂 (B)。本发明的
水性
乙烯基改性环氧
树脂组合物可以提供具有较高抗恶劣环境性能的涂膜,例如抗制动液性能。