Abstract: 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 R1 represents an alkyl group having 10 to 30 carbon atoms, R2 represents —N?C?O or —NH—C(?O)C—O— R1, and A represents a residue other than two —N?C?O groups derived from a diisocyanate.

Abstract: An aqueous dispersion type polyurethane composition is obtained from (a) a polyisocyanate component essentially comprising a diisocyanate and optionally other polyisocyanate compound, (b) a polyol component essentially comprising a polycarbonate diol having an average molecular weight of 500 to 5000 and a carboxyl-containing diol and optionally other polyol compound, (c) an amine component essentially comprising a monoamine compound as an essential component and optionally a diamine compound, (d) a carboxyl-neutralizing component, and (e) water. The composition is suited as a member of automotive intercoating compositions, providing a coating film with good adhesion to surfaces to be coated and satisfactory physical properties. The coating film imparts sufficient impact resistance to coating systems.