A Renewable, Green, and Scalable Polyacrylic Polyol (PAMO) Derived from Olive Oil for Transparent Polyurethane Coatings

Abstract To prepare a transparent polyurethane coating, a renewable, green, and scalable polyacrylic polyol (PAMO) was synthesized from olive oil (OO) and applied as a polyol. To prepare PAMO, the olive oil was first methanolized using methanol, and methyl oleate (MO) was obtained, followed by its getting epoxidized by formic acid and hydrogen peroxide. Epoxidized methyl oleate (EMO) was ring-opened using acrylic acid (AA) with excellent yield. Further, to prepare PAMO, radical polymerization method was utilized. FT-IR, 1HNMR, and gel permeation chromatography (GPC) verified the chemical structures of the synthesized monomer and polymer. Different thermoset aliphatic transparent polyurethane coatings were obtained by reacting the synthesized polyol with hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), Desmodur N3390, and Desmodur Z4470. The best results were obtained using Desmodur Z4470 as the curing agent. Polyurethane obtained from PAMO and Desmodur Z4470 was acquired in three NCO/OH ratios of 0.9, 1, and 1.2, with the 1.2 NCO/OH ratio as the best-obtained result. The new polyol architecture has emerged as a new polyacrylic polyol and transparent polyurethane coatings class.