| 摘要 |
<p>There are described new azo dyes of the formula wherein R1 is an optionally substituted alkyl group, R2 is a substituted aliphatic radical, unsubstituted C3-C10-alkyl or cycloalkyl, and R3 and R4 are alkyl groups; and mixtures thereof with analogous azo dyes in which R4 is H; and also the production and use of these new azo dyes and of the said mixtures thereof for dyeing and printing synthetic fibers, particularly polyester fibers.</p> |
