新型不黄变聚氨酯胶粘剂的研究

介绍了一步法合成新型不黄变聚氨酯(PU)胶粘剂的原料选择及合成工艺,并按相关的国际标准进行了性能测试。通过大量实验确定了聚己二酸丁二醇酯二醇(PBA)与异佛尔酮二异氰酸酯(IPDI)的最佳合成工艺路线是:反应时间为5～10min、反应温度为100～115℃、w(二月桂酸二丁基锡)为0.5%、R值为1.05、后熟化时间为4～10h和后熟化温度为120～140℃。由此制得的新型不黄变PU胶粘剂具有结晶度高、结晶速率快、内聚强度大、耐热性好、剥离强度高、稳定性好且综合性能优良等特点。

Study on new type non-yellowing polyurethane adhesive

The choices of raw material and the synthesis technics of a new type non-yellowing polyurethane(PU) adhesives by one-step method were introduced.The product performance test was carried through correlative international standard.The best route of synthesis technics for polyester polyol(PBA) and isophorone diisocyanate(IPDI) was confirmed by a great lot of experiments.The results showed that the new type non-yellowing PU adhesive has high or good crystallization degree,crystallization velocity,cohesion intensity,thermal stability,peel strength,stability and integration performance when the reaction temperature was between 100 ℃ and 115 ℃,reaction time was betweem 5 min and 10 min,the mass fraction of catalyzer(dibutyltin dilaurate) was 0.5%,R value was 1.05,post cure temperature was between 120 ℃ and 140 ℃ and post cure time was between 4 h and 10 h.