Formation of Hybrid Ring Structure of Cyanurate/Isocyanurate in the Reaction be-tween 2,4,6-Tris(4-Phenyl-Phenoxy)-1, 3,5-Triazine and Phenyl Glycidyl Ether

Reaction products of 2,4,6-tris(4-phenyl-phenoxy)-1,3,5-triazine derived from 4-phenylphenol cyanate ester and phenyl glycidyl ether were analyzed. In addition to an isocyanurate compound and an oxazolidone compound which were well known as reaction products of cyanate esters and epoxy resins, compounds with hybrid ring structure of cyanurate/isocyanurate were determined. Gibbs free energies of the compound having hybrid ring structure of cyanurate/isocyanurate with two isocyanurate moiety were found to be lower than that of the compound with cyanurate ring structure through calculations. Calculation data supported the existence of hybrid ring structure of cy-anurate/isocyanurate. It was revealed that isomerization from cyanurate to isocyanurate occurs via hybrid ring structure of cyanurate/isocyanurate in the reaction of aryl cyanurate and epoxy.

合成三酚基甲烷三缩水甘油醚工艺研究

三酚基甲烷三缩水甘油醚是一种耐高温环氧树脂,具有良好的韧性和加工性能。这种树脂广泛用于高性能复合材料、封装材料等领域。主要研究以苯酚和对羟基苯甲醛为原料合成三酚基甲烷,再以三酚基甲烷与环氧氯丙烷(ECH)缩合制备三酚基甲烷三缩水甘油醚。通过不同反应条件的对比,得出制备优质三酚基甲烷三缩水甘油醚的最佳工艺条件。

三酚基甲烷三缩水甘油醚的合成工艺

主要研究以三酚基甲烷和环氧氯丙烷(ECH)为原材料,在催化剂作用下缩合制备三酚基甲烷三缩水甘油醚.实验结果表明:在三酚基甲烷∶ECH=1∶30,NaOH的质量分数为30%,反应温度为44℃,反应体系水含量0.3%～2%的条件下,可得到环氧值为0.57～0.59,产率为96%的三酚基甲烷的低分子环氧树脂.