Process for the production of a modified fiber material and process for the dyeing of the modified fiber material with anionic textile dyes

摘要

Fibre materials can be modified by treating them at a temperature between 60 and 230 DEG C with an aqueous, alkaline solution of hetero-cycloaliphatic compounds which contain at least one primary, secondary or tertiary amino group or quaternary ammonium group and in which the hetero moiety in the cycle is a carbonic ester radical of the formula -O-CO-O- or a carbamic acid radical of the formula -O-CO-NH-. The modified fibre material has the property of being dyeable using low-electrolyte or completely electrolyte-free and/or low-alkali or completely alkali-free solutions of water-soluble, anionic textile dyes. A dyeing process carried out in that way has the advantage, in particular for fibre-reactive dyes, that there is no need to fix the dyes under alkaline conditions.