The instant invention relates to nitrilediisocyanates of the formula: ##STR1## wherein Ar represents an aromatic hydrocarbon group having 6 to 14 carbon atoms which may contain one or more substituents which are inert towards isocyanate groups and R represents hydrogen or an aliphatic hydrocarbon group having 1 to 4 carbon atoms Which may be used to prepare lightfast polyurethanes which readily adhere to various substances.
                            本发明涉及式为:##STR1## 的腈基二
异氰酸酯,其中 Ar 代表具有 6 到 14 个碳原子的芳香族碳氢基团,可能含有一个或多个对
异氰酸酯基惰性的取代基;R 代表氢或具有 1 到 4 个碳原子的脂肪族碳氢基团。该化合物可用于制备耐光的聚
氨酯,并能够很好地附着于各种物质上。