Patent ID: 6033445
Filing Date: 2000-03-07
Classification: C09B

Abstract:
A concentrated aqueous dye solution, which comprises 5 to 50% by weight, based on the total weight of the solution, of at least one dye of formula (1) ##STR17## wherein X and Y are each independently of the other hydrogen or C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy, and Z is C.sub.2 -C.sub.6 alkanoylamino or C.sub.2 -C.sub.4 hydroxyalkylsulfamoyl, M.sup.+ is the ammonium cation ##STR18## of an amine of formula ##STR19## wherein R.sub.1, R.sub.2 and R.sub.3 are each a radical of formula --(CH.sub.2).sub.2 --O--CH.sub.2 --CH(CH.sub.3)--OH or a radical of formula --(CH.sub.2).sub.2 --O--CH(CH.sub.3)--CH.sub.2 --OH.