Synthesis and photopolymerization kinetics of multifunctional aromatic urethane acrylates containing tertiary amine group

Two multifunctional aromatic urethane acrylates, based on 2, 4-toluene diisocyanate (2, 4-TDI), β-hydroxyethyl arcylate (HEA), and synthetic multifunctional hydroxyl compounds, were synthesized by classical condensation reaction. FTIR was used to monitor the process of the reaction. The photopolymerization kinetics of the urethane acrylates with different photoinitiators was studied by Real-Time Infrared Spectroscopy. The results indicated that different from the commercial urethane acrylate CN 975, the synthetic multifunctional urethane acrylates could be efficiently initiated by BP without the addition of any co-initiators as they have tertiary amine structures.