| 摘要 |
An object is to obtain an aqueous polyurethane resin dispersion which provides a coating film having high hardness, oleic acid resistance and solvent resistance. The aqueous polyurethane resin dispersion comprises a polyurethane resin obtained by reacting (a) a polyol compound, (b) a polyisocyanate compound, (c) an acidic group-containing polyol compound and (d) a chain-elongating agent being dispersed in an aqueous medium, wherein (a) the polyol compound comprises a polycarbonate polyol compound represented by the formula (1), a hydroxyl equivalent of (a) the polyol compound and (c) the acidic group-containing polyol compound is 180 to 400, and a total acid value of (a) the polyol compound, (b) the polyisocyanate compound and (c) the acidic group-containing polyol compound is 22 to 40 mg KOH/g. |
