| abstract |
Disperse dyestuffs of the formula ##STR1## wherein Q 1 and Q 2 are hydrogen or the group V-(A-O) n Z, but do not at the same time represent hydrogen, n A -- denotes an alkylene group, n V -- denotes a direct bond or a bridge member, n Z -- denotes hydrogen, alkyl, aryl, aralkyl or acyl and n N -- denotes an integer from 2-10 and the rings A, B and D can be further substituted. n The dyestuffs are suitable for dyeing polyester fibres from an aqueous liquor by the exhaustion process since they are distinguished by a good affinity and build-up power. The dyeings are very clear and display good general fastness properties, such as fastness to light, sublimation and measuring. |