Isatin derivative suitable as disperse dyes having the oeneral formula:
wherein the symbols have the following meanings:
R represents an alkyl group having up to 5 carbon atoms, a -CH2-COOX group, wherein X stands for an alkyl group having up to 4 carbon atoms, a
group, or a -CH2-CH2-CN group; and R1 represents a H atom, a halogen, preferably Cl or Br, or N02; and the preparation thereof are described.
The disperse dyes of the invention are particularly suited for the dyeing and printing of synthetic fibres, such as polyester fibres, in shades from yellow-green to orange. The dyes are obtained by condensation of 2-benzimidazolyl-acetonitrile with the corresponding isatinic derivative.
适用于
分散染料的
靛红衍
生物,其通式如下
其中符号的含义如下:
R 代表具有最多 5 个碳原子的烷基、-
CH2-COOX 基团,其中 X 代表具有最多 4 个碳原子的烷基、- - -CN
基团或- - -CN 基团;以及 R1 代表 H 原子、卤素(最好是 Cl 或 Br)或 N02。
本发明的
分散染料特别适用于合成纤维(如聚酯纤维)的染色和印花,色调从黄绿色到橙色。这些
染料是由 2-
苯并咪唑基
乙腈与相应的异atinic 衍
生物缩合而成。