“UV-curing of novel tri-functional melamine-phosphate oligomer: An effect of coating with polyurethane acrylate toward mechanical, thermal, and flame retardant properties”

A novel melamine-phosphate tri-functional acrylate (MPTO) was successfully synthesized via cyclization reaction of hexamethylolmelamine (HMM) with phosphorous oxychloride (POCl 3 ) followed by addition hydroxyethylmethacrylate (HEMA). The molecular structure MPTO identified FTIR and 1H-NMR, 13C-NMR, GC-MS spectra. oligomer impregnated polyurethane to make various formulations UV cured on wood galvanized steel panels. results films from differential scanning calorimeter (DSC) thermo-gravimetric analysis (TGA) exhibited increase in thermal stability highest char yield 18.4% at 800°C. diffused diffraction peak appearing around 2ϴ = 16–22° corresponds an amorphous which leads irregular arrangement formation strong cross-linking polymer network. Furthermore, all coating show prominent flame retardancy UL-94 V-0 rating maximum limiting index (LOI) values 34.8%. (PU) coatings that excellent mechanical properties were estimated using tests such as adhesion, pencil hardness, solvent resistance, flexibility, corrosion test. performance revealed can improve the mechanical, thermal, retardant because its unique identity moiety long aliphatic segment ester.