| 摘要 |
<p>The invention relates to novel acid dyes of formula (I) wherein R1 signifies H or a sulpho group R2 signifies H or a sulpho group, R1 has to be different from R2, R3 signifies H, a sulpho group, a substituted C1 to C4 alkyi group or an unsubstituted C1 to C4 alkyi group, a substituted C1 to C4 alkoxy group or an unsubstituted C1 to C4 alkoxy group, R4 signifies H, a substituted C1 to C4 alkyi group or an unsubstituted C1 to C4 alkyi group, a substituted C1 to C4 alkoxy group or an unsubstituted C1 to C4 alkoxy group, R6 signifies a substituted C1 to C9 alkyi group or an unsubstituted C1 to C9 alkyi group, an unsubstituted aryl group or a substituted aryl group. The novel acid dyes can be used for dyeing and printing polyamides.</p> |
