Process for improving the yield and the wet fastness of the dyeing or printing with anionic dyes of cellulosic fibrous material.

摘要

A process for improving the dye yield and the wet fastness of dyeings or prints produced with anionic dyes on cellulosic fibre material, in which the fibre material is treated before dyeing or during dyeing with a quaternary ammonium salt of the formula

in which

  R denotes C1-C3-alkyl,
  X denotes the group


  Hal denotes a halogen atom and
  Q<(-)> denotes the anion of an aromatic sulphonic acid or a C1-C3-alkylsulphate ion.