Abstract:
The modification methods of rosin in solvent-based polyurethanes, waterborne polyurethanes, non-solvent polyurethanes, and non-isocyanate-based polyurethanes in recent years were reviewed. It is concluded that rosin and derivatives can effectively reduce the amount of the petrochemical and improve the water resistance, thermodynamic performance and mechanical properties. Meanwhile, there are still some problems, such as simple modification method, low molecular weight of rosin-based polyol, single application direction. The development trend and research direction of the rosin-modified polyurethanes are proposed.