Abstract A lightfast aq. polyurethane emulsion for leather finishing was prepared mainly from aliphatic isocyanate.

选择脂肪族异氰主要原料，制备了一种耐光型水性聚氨皮革涂剂。

The article is about how to use phosgene and p-nitrophenylamine to react in acetic ether's liquefier to produce p-nitro-phenyl isocyanate, Its best technological condition have been discussed.

介绍用光气和对硝基苯胺在乙乙溶剂中制备对硝基异氰苯的方法，并讨论了其最佳工艺条件。