ASYMMETRIC 1 2 CHROME COMPLEX CONTAINING AZOO AND AZOMETHINE COMPOUNDS

摘要

2:1-chromium complex dyes of the formula: in which: A is the radical of a carbocyclic diazo component with a complex-forming hydroxy or carboxy group adjacent to the azo bridge; B is the radical of a carbocyclic, heterocyclic or open-chain coupling component with a complex-forming hydroxy or amino group adjacent to the azo bridge; D is the radical of a carbocyclic aldehyde with a complex-forming hydroxy group adjacent to the azomethine bond; E is an aliphatic radical with a complex-forming amino group; and n is the number of carboxy groups not participating in the formation of the complex and the sulfonic acid groups. The dyes are eminently suitable for dyeing natural and synthetic polyamides, clear shades with good fastness properties being obtained.