Synthesis and Characterization of Nonionic Polyethylene Glycol Urethane Acrylate as Dispersant for UV-Curable Coatings

In this research polyethylene glycol urethane acrylate was synthesized as a nonionic linear polymeric dispersant based on polyethylene glycol (PEG)، isophorone diisocyanate (IPDI)، hydroxyethyl methacrylate (HEMA) in presence of dibutyltin dilaurate (DBTDL) as catalyst and acetone as a solvent. The nonionic polyethylene glycol urethane acrylate dispersant was characterized by Fourier Transform Infrared (FT-IR) and Proton Nuclear Magnetic Resonance (1H-NMR) and molecular weight was measured by Gel Permeation Chromatography (GPC). Besides، the dispersants were used for dispersing of TiO2 and dispersion quality and distribution was determined by Grindometer. The results indicated that because of steric protect dispersant، suspension particle size decreased. Also dispersant with the medium molecular weight and chain length، showed a better performance on the stabilization of particles of TiO2. J. Color Sci. Tech. 9 (2015)، 217-223©. Institute for Color Science and Technology.