abstract |
The invention relates to a waterborne polyurethane coating and a preparation method thereof, belonging to the technical field of waterborne coatings. In the waterborne polyurethane coating prepared by the invention, a co-penetrating network is formed between the waterborne polyurethane coating and the polyol and the isocyanate by introducing the modifier containing the cyano, so that the aging resistance of the waterborne polyurethane coating under the high-temperature condition is improved, and the problem of discoloration of the coating is avoided. |