环保型双组分聚氨酯固化剂MDI/TMP的开发及应用

Research and Application of Environment Friendly 2K MDI/TMP Polyurethane Hardener

探讨了利用MDI(二苯基甲烷二异氰酸酯)低毒、低饱和蒸汽压、优异的低温性能来制备固化剂的时代背景、方法及其漆膜性能和在木器漆中的应用。设计温度70℃,反应时间4 h,理论—NCO含量为12.7%,固体分75%,并对产物进行表征。发现MDI/TMP预聚物固化剂具有高活性,优异的漆膜柔韧性,特别适合低温固化。分析了MDI/TMP和TDI/TMP这2种聚氨酯固化剂物化性能及在木器漆中的异同点。

The background, methods, film performance and its application in wood coatings of MDI hardener were discussed because of its low toxicity, low saturated vapor pressure and excellent performance at low temperature. Conditions of experiment were designed at 70℃ ,4 hours, NCO value at 12.7% and solid content at 75%. Products were characterized. It was found that MDI/TMP prepolymer provided high reaction activity, excellent flexibility, especially under low temperature. Both of differences and similarities between MDL/TMP and TDI/TMP were discussed. Future prospects of MDI/TMP were also described.