Disazo dyestuffs of the formula A'--N.dbd.N--B'--N.dbd.N--K are disclosed in which A' is an aromatic carbocyclic or aromatic heterocyclic radical; B' is aromatic carbocyclic and at least one of A' and B' carries a cyano group ortho to the azo group; and K is the radical of a coupling component, e.g. parahydroxyaryl or N-substituted paraaminoaryl radicals. These dyestuffs are useful for dyeing synthetic hydrophobic materials such as polyesters, cellulose triacetate, polyamides, polyolefins, polyurethanes and polymers and copolymers of acrylonitrile to give greenish-blue to bluish-red shades with good fastness properties.
公开了
化学式为A'--N.dbd.N--B'--N.dbd.N--K的二偶氮
染料,其中A'是芳香
环烃或芳香杂环基;B'是芳香
环烃,且A'和B'中至少有一个带有
氰基,位于偶氮基的邻位;K是偶联组分的基团,例如对羟基芳基或N-取代对
氨基芳基基团。这些
染料适用于染色合成疏
水材料,例如聚酯,三
醋酸纤维素,聚酰胺,聚烯烃,聚
氨酯以及
丙烯腈的聚合物和共聚物,可以得到绿蓝色至蓝红色的色调,并具有良好的牢度性能。