腰果壳液制水分散多异氰酸酯  

WATER-DISPERSIBLE POLYISOCYANATE MADE FROM CASHEW NUT LIQUID

作　　者：党晓容[1] 袁荞龙[1] 王得宁[1] 

机构地区：[1]华东理工大学材料科学与工程学院,上海200237

出　　处：《林产化学与工业》2005年第4期59-62,共4页Chemistry and Industry of Forest Products

基　　金：国家自然科学基金资助项目(50073005)

摘　　要：用精制后的商品腰果壳液以1∶1的摩尔比与相对分子质量(Mn)为1000的聚乙二醇反应得到带亲水和疏水链段的一端为羟基的表面活性剂,用此表面活性剂封闭六亚甲基二异氰酸酯三聚体异氰脲酸酯的部分异氰酸根,得到水可分散多异氰酸酯,作为端羟基水性聚氨酯交联剂,适用期为5h,加入碳酸钙成膜后有很好的耐溶剂性和较高的断裂伸长率。A suffactant containing both hydrophilic and hydrophobic chain segments with terminal hydroxyl group at one end of the molecular chain was prepared by reacting refined commercial cashew nut liquid with polyethylglycol at molar ratio of 1 ： 1, Part of the --NCO group of isocyanurate in the trimerized hexamethylene diisocyanate was capped by such surfactant to obtain water-dispersible isocyanate（WPI） ,which could be used as a crosslinking agent for the hydrophilic polyurethane（PU） terminated with hydroxyl group. The pot life of the mixture of PU and WPI was 5 h. The crosslineked film, formed from this mixture by addition of nanometer calsium carbonate showed good resistance against acetone and very high rapture elongation.

关 键 词：腰果壳液 水分散多异氰酸酯 水性涂料 非离子表面活性剂 

分 类 号：TQ633[化学工程—精细化工]