Glycol based pigment preparation for mass dyeing of polyacrylonitrile fibers

摘要

The invention relates to a process for mass dyeing of polyacrylonitrile, wherein there is incorporated into a solution of acrylonitrile polymer or copolymer a pigment preparation which comprises 10 to 60 % by weight of a pigment, 15 to 85 % by weight of a glycol-based solvent, 5 to 25 % by weight of a surfactant, and 0 to 10 % by weight of customary additives, the percentages being based on the total weight of the pigment preparation.