申请人:KANSAI PAINT CO. LTD.
公开号:EP0900832A2
公开(公告)日:1999-03-10
An organic solvent-based heat-curable high solid coating composition comprising:
(A) a carboxyl-containing compound having an acid value of 50 to 500 mg KOH/g wherein 20 mol% or more of the carboxyl groups are silylated carboxyl groups,
(B) at least one epoxide selected from (B-1) an epoxy-, hydroxyl- and hydrolyzable alkoxysilyl-containing vinyl polymer, (B-2) the vinyl polymer (B-1) wherein 20 mol% or more of the hydroxyl groups are silylated hydroxyl groups, and (B-3) an epoxy compound having a number average molecular weight less than 1,000, and
(C) a crosslinked particulate polymer,
the composition having a solid content of 65 wt.% or more; and a method for forming a topcoat using the composition. The composition of the invention has a sufficiently high solid content, is capable of forming a coating film with high resistance to acids and the like, and is excellent in low-temperature curability, storage stability and recoat adhesion.
一种有机溶剂型热固化高固含涂料组合物,包括
(A) 含羧基的化合物,其酸值为 50 至 500 毫克 KOH/克,其中 20 摩尔%或更多的羧基为硅烷化羧基、
(B) 至少一种环氧化物,选自(B-1)环氧、羟基和可水解的含烷氧基硅烷基乙烯基聚合物,(B-2)乙烯基聚合物(B-1),其中 20 摩尔%或更多的羟基是硅烷基化羟基,以及(B-3)平均分子量小于 1,000 的环氧化合物,以及
(C) 交联微粒聚合物、
该组合物的固体含量为 65 wt.% 或以上;以及使用该组合物形成面漆的方法。本发明的组合物具有足够高的固含量,能够形成具有高耐酸性和类似耐酸性的涂膜,并且在低温固化性、储存稳定性和重涂附着力方面表现优异。