双环戊二烯改性不饱和聚酯树脂的研究

Study on Unsaturated Polyester Resin Modified by Dicyclopentadiene

探讨了双环戊二烯（DCPD）改性不饱和聚酯树脂的各种影响因素及合成主要工艺条件，确定的最佳反应条件为：n（DCPD）：n（总酸）=0．1-0．25：1，催化剂的加入量为0．10％～0．15％，滴加DCPD时聚酯的酸值在40～55mg／g，封端温度控制在125—135℃，加成时间为2h，苯乙烯的加入量在30％-35％。应用上述工艺条件合成的树脂具有良好的气干性、柔韧性。

The influencing factors and main technological conditions for synthesis Of dicyclopentadiene-modified polyester resin were discussed. The optimum reaction conditions are as follows：the molar ratio between DCPD and total acid was 0. 1 - 0. 25：1 ,the dosage of catalyst was 0. 10% -0. 15% , the acid number of polyester during dropping DCPD was 40 - 55mg/g, the temperature for capping end groups was 125 - 135℃ , and the addition time was 2h,the dosage of styrene was 30% - 35%. Under the optimum reaction conditions the modified unsaturated polyester resin has good air-drying property and better flexibility.