降低TMP-TDI加成物中游离TDI含量的研究

Study on the Content Decrease of Free-TDI in TMP-TDI Adduct

以甲苯二异氰酸酯(TDI)、三羟甲基丙烷(TMP)为原料,采用化学合成法合成了低游离TDI含量的双组分聚氨酯用固化剂。结果表明:当n(—NCO)/n(—OH)为1.9,催化剂质量分数为0.1%,催化剂加入温度为55℃时,合成了游离TDI含量为0.90%(质量分数)的TMP-TDI加成物,配漆试验表明产品性能优异。

With TDI and TDI as materials, through chemical synthesis method, 2K PU curing agent is synthesized with low free- TDI. The results show that the free-TDI content of TMP-TDI could be reduced to 0.90% when NCO/OH tool ratio is 1.9, the catalyst content is 0. 1%, and the reaction temperature is 55℃. The 2K PU coatings have excellent performance.