| 摘要 |
<p>1:2 Chromium complex dyes of the formula WHEREIN A represents the radical of a diazo component, B represents the radical of a coupling component, -X- is -O-, -NH-, -N-alkyl, -N-aralkyl or -N-aryl, ¦¦¦ -Y- is -O- or -COO-, R1 is hydrogen or alkyl and R2 is a radical of the benzene or naphthalene class which is substituted by a carboxy or a sulpho group, K<+> represents a cation, and wherein the benzene ring b can carry a further fused benzene ring or can be substituted by halogen, nitro, low molecular alkyl or alkoxy as well as arylazo groups, and the radicals A and B are devoid of -SO3H and -COOH groups. These dyes are useful for dyeing and printing natural and synthetic polyamides to produce level dyeings of good fastness, especially fastness to pulling, water and perspiration.</p> |
