Properties of radiation curable hyperbranched polyurethane acrylate from palm oil oleic acid

Radiation curable hyperbranched urethane acrylate （HBPUA） from oleic acid of palm oil was synthesized aided by p-toluene sulfonic acid as a catalyst. This mixture was then used as the core （HBP-1） and reacted with palm oil oleic acid to form the hyperbranched polyol （HBP-2）. HBPUA was prepared by reacting HBP-2 resin with diisocyanate and hydroxyl-containing acrylate monomer with the presence of 0.1-2wt% dibutyltin dilaurate as a catalyst. The reaction was confirmed by several analytical data i.e. hydroxyl value （OHV）, Fourier Transform infrared （FT IR） spectroscopy gel permeation chromatography （GPC） and nuclear magnetic resonance （NMR） spectroscopy analyses. The HBPUA was easily curable when subjected to electron beam （EB） or ultraviolet （UV） radiation.