| 摘要 |
<p>The invention relates to novel acid dyes of formula (I)
wherein
R 1
signifies H or a sulpho group
R 2
signifies H or a sulpho group, R 1 has to be different from R 2 ,
R 3
signifies H, a sulpho group, a substituted C 1 to C 4 alkyl group or an unsubstituted C 1 to C 4 alkyl group, a substituted C 1 to C 4 alkoxy group or an unsubstituted C 1 to C 4 alkoxy group,
R 4
signifies H, a substituted C 1 to C 4 alkyl group or an unsubstituted C 1 to C 4 alkyl group, a substituted C 1 to C 4 alkoxy group or an unsubstituted C 1 to C 4 alkoxy group,
R 6
signifies a substituted C 1 to C 9 alkyl group or an unsubstituted C 1 to C 9 alkyl group, an unsubstituted aryl group or a substituted aryl group. The novel acid dyes can be used for dyeing and printing polyamides.</p> |
