| abstract |
Basic dyes of formula (I) (in which D is the quaternary gp. of a heterocyclic diazo component; R is hydrogen, alkyl or opt. substd. phenyl; R1 and R2 are hydrogen or an aliphatic, cyclo-aliphatic, araliphatic or opt. substs. phenyl gp; X is cyan or carbamoyl and X is an anion) are used for dyeing anionic modified fibres esp. polyesters, polyamides or polyacrylonitrile in yellow to violet shades. (I) give intense colours with very good light and wet fastness. |