用一缩二乙二醇增韧不饱和聚酯树脂,在二月桂酸二丁基锡的催化作用下制备出路标涂料用不饱和聚酯树脂。其最优原料配比为：顺酐与苯酐物质的量比为2∶1,一缩二乙二醇占醇总量的物质的量为15%,催化剂的用量为0.5%,阻聚剂的用量为0.025%~0.030%。其最佳合成工艺为采用两步法合成工艺,最高反应温度为225℃,树脂的酸值应处于25~35 mgKOH/g的范围内。“,”Unsaturated polyester resin which used for road marking coating was prepared by using diethylene glycol as toughening agent and dibutyltin dilaurate as catalyst.The optimum ratio is MA ∶ PA=2 ∶ 1,the molar fraction of diethylene glycol is 15% of alcohol,the mass fraction of the catalyst is 0.5% and the amount of polymerization inhibitor is 0.025% ~ 0.030%.The optimum synthesizing process is the two-step synthesis and the highest reaction temperature is 225 ℃.The acid value of unsaturated polyester resin is between 25 ~ 35 mgKOH/g.