催化剂对鞋用聚氨酯胶黏剂反应及性能的影响

Effect of Catalyst on Synthesis and Properties of Polyurethane Adhesives

本文对比有机锡、有机铋、锌铋复合及功能型催化剂合成聚氨酯胶黏剂的反应速度,考察了催化剂类型及用量对聚氨酯胶液加固化剂后的可使用时间、强度、耐热及耐水解性能的影响。结果表明,有机铋和锌铋复合催化剂的催化活性不如有机锡催化剂高;提高和调整有机铋和锌铋复合催化剂用量,调节控制聚氨酯反应速度,可稳定合成聚氨酯胶黏剂。聚氨酯样品与固化剂作用,有机铋合成样品的粘度变化幅度最小;剥离强度和耐热性能差异不大;有机锡和功能型催化剂合成样品水解效果较佳,锌铋复合催化剂合成样品的水解性能稍差。

In this article, the reaction speed of polyurethane adhesive synthesized by the organotin, organobismuth compound, zinc-bismuth compound and functional catalyst was compared. The effects of catalyst type and dosage on the pot life, peel strength and hydrolysis resistance of polyurethane adhesive were investigated. The results showed that the catalytic activity of the organobismuth and zinc-bismuth compound was slower than that of the organotin catalyst.Increasing and adjusting the amount of organobismuth and zinc-bismuth catalyst, regulating and controlling the reaction speed of polyurethane, can steadily synthesize polyurethane adhesive. After adding hardener in polyurethane adhesive, the viscosity change value of organobismuth sample is the smallest. There is not much difference in peel strength and heat resistance. In terms of hydrolysis resistance, samples synthesized by organotin, and functional catalysts have better hydrolysis properties, while sample synthesized by zinc-bismuth composite catalysts have slightly worse hydrolysis performance.