Abstract
The multi-functional methacrylates are prepared through polycondensation by isophorone diisocynante (IPDI), pentaerythritol triacrylate (PETA) reacting with epoxy acrylate, 2,2-bis[4-(20-hydroxy-30-methacryloyloxypropoxy)phenyl]propane (Bis-GMA), the series of urethane epoxy acrylate resins are successfully synthesized. The urethane epoxy acrylate oligomer’s structure is characterized by Fourier transform infrared spectroscopy (FT-IR). In order to enhance the hardness of the resins, the colloidal silica is successfully reacted with 3-(trimethoxy silyl)propyl methacrylate (MSMA). The characteristics of the colloidal silica/MSMA are measured by means of dynamic light scattering (DLS). The acrylate functional groups are chemically bonded to the surface of the silica spheres, enhancing the compatibility of the organic/inorganic interface; the highest hardness can reach 7H, and the adhesion of the PC reaches 5B. The thermal properties of the cured coating are investigated by means of thermal gravimetric analysis (TGA), with the decomposition temperature (Td) reaching up to 440°C.
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