Newly UV-curable polyurethane coatings prepared by multifunctional thiol- and ene-terminated polyurethane aqueous dispersions: Photopolymerisation properties

摘要

Although there is much interest in UV curable waterborne polyurethanes, current urethane acrylate-based UV systems suffer from oxygen inhibition, non-uniform crosslinking, wide mechanical transition ranges and high internal stress levels. Thiol-ene chemistry suffers much less from oxygen inhibition and has much higher functional group conversion.