The Research was to study the synthesis of the epoxidized sunflower oil, by in situ peracetic acid method, for ultraviolet curable formulations. The effect of diluents and types of photoinitiators were studied in energy consumption and physical properties of coating film. Sunflower oil inclusive of the unsaturated fatty acids was epoxidized for 8 hours at the reaction temperature of 70ํc. The epoxidized sunflower oil possessed 4.95% of oxirane oxygen. Epoxidized sunflowed oil can be cured with ultraviolet radiation using either cationic or hybrid initiation. The coating formulation could be prepare from epoxidized sunflower oil and nanocomposite coating formulating was incorporated modifiled montmorillonite with various amounts (0.5, 1.0 1.5% by wt). The effect of diluents and types of photoinitiatiors were studied. It was found that the formulations with hybird photoinititor used energy in curing process less than those with cationic photoinitator. Moreover, the formulations without diluent could be curedwith lower radiation energy than those with diluent. Impact strength and hardness were found to increase with an increasing modifiled montmorillonite in nanocomposite coating formulation and also increase with incorporated reactive diluent in the coating formulation.
