Alkyd polyols were synthesized using rosin and diethylene glycol (DEG) as raw materials and were then reacted with toluene diisocyanate (TDI) to produce prepolymer type polyurethane paints.

• 由松香及二甘醇等合成醇酸树脂多元醇与TDI反应制备了预聚型聚氨酯涂料 .