The rosin modified polyurethane paint were synthesized by crosslinking hydroxyl alkyd resins with polyurethane prepolymers which was obtained by reacting TDI with rosin modified resin polyols.

• 用松香改性的醇酸树脂多元醇与TDI反应合成聚氨酯预聚物，与羟基醇酸树脂交联制备聚氨酯涂料。