Sulfur containing nitroamino benzene dyes of formula:
and salts thereof wherein
(a) R₁ and R₂ are the same or different and are selected from the group consisting of alkyl, hydroxyalkyl, polyhydroxyalky, aminoalkyl, monoalklylaminoalkyl and dialkylaminoalkyl,
wherein
(b) n is 0, 1 or 2, and wherein
(c) The group
occupies a position that is meta or para to the group - NHR₁; a process for synthesizing these compounds and their use as direct dyeing hair dyes also being disclosed.
式中的含
硫硝基
氨基苯
染料:
及其盐类 其中
(a) R₁ 和 R₂ 相同或不同,且选自由烷基、羟基烷基、多羟基烷基、
氨基烷基、单烷基
氨基烷基和二烷基
氨基烷基组成的组、
其中
(b) n 为 0、1 或 2,其中
(c) 基团
占据基团-NHR₁的偏位或对位;还公开了合成这些化合物的工艺及其作为
直接染料染发剂的用途。