异辛酸镧对半硬质聚氨酯泡沫材料的影响

Effect of Lanthanum(Ⅲ) 2-Ethylhexanoate on Performance of Semi-rigid Polyurethane Foam Materials

半硬质聚氨酯泡沫材料属于较新型的泡沫材料,催化剂对合成聚氨酯整皮泡沫材料的质量起到最为关键的作用,采用"络合萃取"法来制备异辛酸镧稀土,实验条件下,反应时间为30 min,温度控制为70℃,氯化镧料液浓度为120 g/L,氯化镧的转化率最高,可达99%以上。在全水发泡半硬质聚氨酯泡沫体系中添加异辛酸镧,结果表明:异辛酸镧的加入能明显改善泡沫的形态,泡孔尺寸更加均匀,具有更好的形态结构。

Semi-rigid polyurethane foam was a new kind of foam material. The catalysts were the most important for the quality of synthesized polyurethane integral skin foam material. Lanthanum （III） 2-ethylhexanoate was prepared by complexation extraction process with reaction time of 30 min, temperature of 70 ℃ , and lanthanum chloride concentration of 120 g/L. The conversion of lanthanum chloride was the best （ more than 99% ） under above conditions. The results showed that the foam morphology was apparently improved and the cell-sizes were more uniform with the addition of lanthanum（III） 2- ethylhexanoate.