申请人:PPG Industries Ohio, Inc.
公开号:US10597554B2
公开(公告)日:2020-03-24
The present invention relates to a primer coating composition that includes, (a) a (meth)acrylic polymer that includes hydroxyl groups, and which has a Tg of at least 30° C. The primer coating composition further includes, (b) a polyester that includes hydroxyl groups, and which has a weight average molecular weight of less than 3000, and a hydroxyl value of at least 100. The primer coating composition also includes, (c) a crosslinking agent having at least two isocyanate groups. The present invention also relates to a coated article that includes a repaired area that includes a primer coating formed from the primer coating composition of the present invention. The primer coating compositions, in accordance with some embodiments, provide reduced or minimal ringing defects.
本发明涉及一种底漆涂料组合物,它包括:(a) 含有羟基的(甲基)丙烯酸聚合物,其 Tg 至少为 30°C;底漆涂料组合物还包括:(b) 含有羟基的聚酯,其重量平均分子量小于 3000,羟基值至少为 100。底漆涂料组合物还包括:(c) 具有至少两个异氰酸酯基团的交联剂。本发明还涉及一种涂层制品,该制品包括一个修复区域,该区域包括由本发明的底漆涂料组合物形成的底漆涂层。根据某些实施例,本发明的底涂层组合物可减少或最小化振纹缺陷。