申请人:NIPPON PAINT CO., LTD.
公开号:EP0673983A1
公开(公告)日:1995-09-27
A waterborne paint is provided by dissolving or dispersing a polyester resin and a crosslinker in an aqueous medium containing a base. The polyester resin contains a hydroxy-terminated polyalkadienediol having an average degree of polymerization from 5 to 50, a hydrogenated product thereof or a mixture thereof in a proportion from 1 to 30 % by weight of the entire polyester-forming reactants, and has an acid number from 5 to 150, a hydroxyl number from 30 to 250. The paint is useful for forming a multilayer coating film on automobile bodies by applying the paint between an electrodeposition coating layer and a top coating layer.
将聚酯树脂和交联剂溶解或分散在含有碱的水性介质中,可得到一种水性涂料。聚酯树脂中含有一种平均聚合度为 5 至 50 的羟基封端聚烷基二烯二醇、其氢化产物或其混合物,其比例为整个聚酯形成反应物重量的 1%至 30%,酸数为 5 至 150,羟基数为 30 至 250。这种涂料可用于在汽车车身的电泳涂装层和面层涂装层之间形成多层涂膜。