| 摘要 |
Metallizable azo dyes of the formula I <IMAGE> (I) wherein A is the radical of a diazo component of the benzene or naphthalene series, which diazo component contains in the o-position with respect to the azo group a metallizable hydroxyl group, R is methyl or chloromethyl, or phenyl which can be substituted by C1-C4-alkyl, C1-C4-alkoxy or halogen, R1 is hydrogen or C1-C4-alkyl, R2 is hydrogen or methyl, n is 0 or 1, and m is 0, 1, 2 or 3. In the form of their heavy-metal complexes, the dyes are suitable in particular for dyeing leather. These dyes are deeply colored, cover well, have good substantivity and build-up while simultaneously having good fastness properties. |
