水分散性异氰酸酯交联剂的合成与性能初探

Study on the Synthesis and Properties of Water Disperse Polyisocyanates

主要对水分散性异氰酸酯交联剂的合成及性能进行了初步的探讨。通过不同的异氰酸酯与不同的乳化剂反应,考察了所生成的交联剂在水中的分散情况,发现HDI三聚体与PEG1000反应所得交联剂在水中的分散效果较好。还考察了所得异氰酸酯交联剂与水的反应情况,发现大约在6～8h以内其与水的反应不显著。并讨论了该交联剂与聚丙烯酸酯反应所得交联薄膜在有机溶剂中的溶胀情况。

The synthesis and properties of water disperse polyisocyanate crosslinker were discussed in this paper.It was found that the water disperse polyisocynates can be obtained from the HDI trimer and PEG 1000.The amount of the PEG1000 used should be greater than 20% of the isocynates by weight.Within 6-8hrs,the reaction between the water disperse polyisocyantes and water at room temperature was not very rapid.The swell of the crosslinked polyacrylates by the water disperse polyisocynates was also discussed.