| 摘要 |
Metal complex dyes comprising a metalizable azo compound represented by one of Formulas [I] through [IV]: <IMAGE> [I] <IMAGE> <IMAGE> [II] <IMAGE> [III] <IMAGE> [IV] In Formulas [I] through [IV], Ps represents a phosphono group in the form of a free acid or a salt; Sf represents a sulfo group in the form of a free acid or a salt; m is 0, 1 or 2. R1 represents a hydrogen atom or an amino group; X represents a hydroxyl group, an alkoxy group having a carbon number of 1 or 2 or a carboxyl group. Y represents a hydroxyl group, an alkoxy group having a carbon number of 1 or 2, a carboxyl group or a methyl group; R2 represents a hydrogen atom or a hydroxyl group; A represents a phenyl group or naphthyl group selected from the group comprising the following +E,crc/1/ through +E,crc/4/ : <IMAGE> +E,CRC/1/ <IMAGE> +E,CRC/2/ <IMAGE> +E,CRC/3/ <IMAGE> +E,CRC/4/ In the above formulas +E,crc/1/ through +E,crc/4/ , Sf has the same definition as above; n is 0, 1 or 2. R3 represents a hydroxyl group or a carboxyl group; R4 represents a hydroxyl group, a carboxyl group or an amino group; R5 and R6 independently represent a hydroxyl group or a carboxyl group; R7 and R8 independently represent a hydrogen atom, a hydroxyl group or an amino group. B has the same definition as A above except that R3 represents a hydroxyl group, a carboxyl group or an amino group. R9 represents a hydrogen atom, a methyl group, an alkoxy group having a carbon number of 1 or 2 or a sulfo group in the form of a free acid or a salt; D represents a coupling component residue having a metalizable hydroxyl group at the position adjoining to the azo group. Use of these metal complex dyes makes it possible to dye metal-tanned leather with good permeability and excellent color fastness to rubbing and color fastness to light.
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