Synthesis of Trivinylisooctyl POSS and Its Application in UV-Curing of Polyurethane Acrylate Coatings

To improve the overall performance of polyurethane acrylic (PUAs) coatings applied to an iron or wood substrate, a modifier, trivinylisooctyl polyhedral oligomeric silsesquioxane (TVi7iso–POSS), was successfully synthesized by polycondensation reaction in presence organotin catalyst. TVi7iso–POSS is POSS derivative possessing three olefin and seven isooctyl bonds; its molecular structure confirmed FT-IR, 1H-NMR, mass spectrometry. The then used as modifier with butyl methacrylate (BMA), dodecafluoroheptyl (DFMA), difunctional PUA (PUA–2), photo-initiator 1173 produce novel coating (PFMPUAs) via UV-curing. obtained PFMPUAs analyzed X-ray photoelectron spectrometry, SEM, atomic force microscopy, TGA, differential scanning calorimetry. newly TVi7iso–POSS, enhanced thermal stability, hardness, flexibility, impact resistance, adhesion PUAs maintained good light transmittance. Moreover, exhibited better compared previously studied when addition DFMA 15 wt.% PUA–2. Therefore, has potential applications field environmentally friendly coatings.