Method for dyeing fibrous materials and dye assistant relating t

Details Method for dyeing fibrous materials and dye assistant relating t Method for dyeing fibrous materials and dye assistant relating t

1994-05-25

1995-08-01

Lieberman, Paul

Bleaching and dyeing; fluid treatment and chemical modification

Organic additive for dye composition, dye composition...

Sulfur-containing

8925, C09B 6700, D06P 304

Patent

active

054376904

ABSTRACT:
A method for dyeing fibrous material is provided. The method includes contacting a fibrous material with a dyebath comprising a mixture of a dye assistant and a dye soluble or dispersed with the dye assistant in the dyebath. The dye assistant comprises a N-alkyl substituted aromatic sulfonamide. The dye assistant of the present invention can be advantageously utilized for dyeing difficult to dye fibers such as aromatic polyamide fibers, polybenzimidazole fibers and aromatic polyimide fibers.

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