Trimethoxysilane-assisted UV-curable urethane acrylate as clear coating: from synthesis to properties

UV-curable urethane acrylate oligomers are commonly used in coating application. For improving the properties of final coating, modification of the structure of oligomers via synthesis process is necessary. The purpose of the present study was synthesis of UV-curable urethane resins and improving its properties using organic-inorganic silicon coupling agent. The synthesized resin was characterized by FTIR and (HNMR)-H-1. Also, scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDAX), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM) were used for studying the final structure of hybrid coatings. The hardness and optical behaviors of coatings were studied too. The results confirm the formation of silica-based inorganic part in the structure of urethane acrylate oligomer providing a series of coatings having different hardness and optical properties.