Synthesis of Cyclic Carbonate Terminated Polycarbonates as Precursors for Non-Isocyanate Polyurethane
발표자
()
초록
내용
Polyurethanes are generally synthesized by reacting polyols with isocyanate compounds. However, isocyanates are toxic compounds, and they require the use of phosgene in manufacturing. Here, we developed a non-isocyanate process for the production of polyurethane. α,ω-hydroxyl terminated poly(ether-carbonate) polyol was first prepared via carbon dioxide/propylene oxide copolymerization using a double metal cyanide catalyst. Next, oxalyl chloride and glycerol carbonate were reacted to synthesize a precursor having cyclic carbonate at an end thereof, and the precursor was reacted with a hydroxyl group of polyol. The synthesized cyclic carbonate-end polyols were characterized by nuclear magnetic resonance spectroscopy, and gel permeation chromatography.