Precomposition for preparing waterborne polyurethane and waterborne polyurethane prepared therefrom

摘要

More particularly, the present invention relates to a water-dispersible polyurethane composition having corrosion resistance, which comprises a diol compound having corrosion resistance in a recurring unit and forming a corrosion-resistant coating film on a surface of a highly corrosive metal, The present invention relates to a composition of a corrosion-resistant water-dispersible polyurethane which can effectively slow down the corrosion resistance.