Hybrid UV–curable poly(urethane acrylate)s surface coatings using coconut oil based alkyd resin

A various environmental friendly ultraviolet (UV) curable poly(urethane acrylate)s coatings from renewable resources were synthesised for various industrial applications. In this contest, polyurethane prepolymers were synthesised from coconut oil based alkyd resin as polyol with aromatic and aliphatic diisocyanates by varying NCO/OH mole ratio, these polyurethane prepolymers were coupled with hydroxyl functional methacrylate (2- HEMA). These poly (urethane acrylate)s oligomers, reactive diluents and benzophenone as photoinitiator were cross linked using UV radiations in form of solid coating films. The effect of NCO/OH mole ratio on the structure and properties of these poly(urethane acrylates)s were characterized by IR spectroscopy and also on the physicomechanical and chemical resistance properties of the coated panels

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