| abstract |
The invention relates to a preparation method of a light-cured water-based repairable polyurethane coating containing Diels-Alder components, belonging to the technical field of preparation of water-based polyurethane. It first prepares NCO-terminated polyurethane prepolymer, and then uses diol MAL(OH) 2 containing maleimide group to modify waterborne polyurethane emulsion, and finally obtains light-cured waterborne repairable polyurethane containing Diels-Alder components coating. The method of the invention can prepare recyclable, repairable and UV-curable diol-modified water-based polyurethane containing maleimide group, the polyurethane can improve the water resistance, mechanical properties and transparency of the coating, and can be repaired It can be used in the field of steel anti-corrosion, repairable and recyclable substrates. |