申请人:Fujita Naohiro
公开号:US20080194757A1
公开(公告)日:2008-08-14
The water-dispersed polyurethane composition of the present invention comprises a polyisocyanate component (a), a polyol component (b), and water as the essential components, wherein, at least, an isocyanate compound represented by general formula (I) below is used as the polyisocyanate component (a). The water-dispersed polyurethane composition of the present invention is excellent in adhesiveness, water resistance, corrosion resistance, heat resistance, weather resistance, water repellency, oil repellency, and the like, and can be suitably used as paint for surface-treated steel plates.
wherein R
1
represents an alkyl group having 10 to 30 carbon atoms, R
2
represents —N═C═O or —NH—C(═O)C—O— R
1
, and A represents a residue other than two —N═C═O groups derived from a diisocyanate.
本发明的水分散聚氨酯组合物包括聚异氰酸酯组分(a)、聚醇组分(b)和水作为必要组分,其中,至少使用下式(I)表示的异氰酸酯化合物作为聚异氰酸酯组分(a)。本发明的水分散聚氨酯组合物在粘附性、耐水性、耐腐蚀性、耐热性、耐候性、防水性、防油性等方面表现出色,并可适用于表面处理钢板的涂料。其中,R1表示具有10至30个碳原子的烷基,R2表示—N═C═O或—NH—C(═O)C—O—R1,A表示从二异氰酸酯衍生的两个—N═C═O基团以外的残基。