Development of a Novel Thermally Curable Waterborne PolyurethaneAcrylate (WPUA) Coating with Enhanced Mechanical Properties

Successful development of a novel structure for thermal-curable waterborne polyurethane acrylate(WPUA) coatings was accomplished. The synthesized polyurethane structure has acrylate groups inthe hard segment and polyesters with double bonds in the soft segment to form a network of robustcrosslinks. The hydroxyl groups in PEG-۴۰۰ allowed it to be introduced to the WPU coating as across-linking agent. The double bonds undergo curing in the presence of the initiator and with the useof heat. Samples were evaluated by TGA, DLS, FTIR, NMR, SEM, AFM and gel fraction content.Mechanical characteristics, pencil hardness, shore D, surface roughness and water contact angle offilms were also assessed.

کلیدواژه ها:

waterborne coating ، polyurethane acrylate ، cross-linked network ، Thermal curing