Dyestuffs of the formula ##STR1## wherein B is the radical of a coupling component of the dispersion series, which is derived from an N-alkylated aniline or aminonaphthalene, and which contains in the o-position with respect to the azo bridge a free or acylated primary or secondary amino group, and which is free from water-solubilizing groups, R is a hydrogen atom, a cycloalkyl group or an optionally substituted alkyl group. The new dyestuffs give yellow, red or orange shades on polyester fibers and can be applied from aqueous baths without addition of dispersing agents.
公式为##STR1##的
染料,其中B是分散系列偶联组分的基团,该偶联组分源自于N-烷基化
苯胺或
氨基
萘,且在与偶氮桥相对的o-位置含有自由或酰化的一级或二级
氨基团,且不含有
水溶性基团,R是氢原子、环烷基或可选取代的烷基。这些新
染料在涤纶纤维上呈现黄色、红色或橙色,并且可以在无需添加分散剂的
水性浴中应用。