| 摘要 |
Complexes of the formula <IMAGE> in which each of X1 and X2, independently, is -COO- or -O-, each of B1 and B2, independently, is the radical of a coupling component of the benzene series containing up to two non-condensed benzene rings or a radical of a coupling component of the quinoline series, which coupling component radicals are free from acid groups, each of <IMAGE> independently, is the radical of a diazo component of the benzene series in which the rings A1 and A2 shown are free from acid groups bound directly thereto, each of the floating sulpho groups on the naphthalene rings, independently, is in the 3- or 4-position, which complexes are free from fibre reactive groups and are in free acid or salt form, and mixtures of such complexes are useful as anionic dyestuffs for substrates comprising or consisting of, for example, natural or regenerated cellulose, natural or synthetic polyamides, leather, polyurethanes or polymers modified to contain basic groups.
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