| 摘要 |
<p>Vat dyestuffs of the formula N ANGLE A1-N-CC-N-A2 ¦¦ PARALLEL ¦ (1), R1NNR2 ANGLE C ¦ S-R wherein R represents alkyl with 1 to 4 carbon atoms, R1 and R2 represent hydrogen or alkyl with 1 to 4 carbon atoms and each of A1 and A2 represents a vattable radical with 3 to 7 condensed rings are characterized by improved resistance to alkali and are suitable for dyeing and printing the most diverse materials, in particular fibers made from natural or regenerated cellulose.</p> |
