Title: Process for the dyeing of fibrous materials containing basic functions in dyeing baths based on organic solvents

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Abstract: The present invention concerns a dyeing process with acid dyes for fibrous materials having basic functions, characterized in that amines are used which form salts or complexes with the dyes and have the general formula: ##STR1## wherein: R.sub.1, R.sub.2 and R.sub.3 are aliphatic hydrocarbon radicals, saturated or unsaturated, and having a linear or branched chain; R is either hydrogen or an aliphatic hydrocarbon radical, with either a linear or branched chain, saturated or unsaturated, on the general condition that the sum of the carbon atoms of the radicals R.sub.1, R.sub.2, R.sub.3 and R be a whole number between 11 and 29. More particularly, this invention relates to the use of dyeing baths based on preferably chlorinated organic solvents, containing salts or complexes of organic dyes, containing carboxylic and/or sulphonic groups, with aliphatic amines of a selective liquid anion-exchanger character wherein a primary or secondary nitrogen atom is bound to a tertiary alkyl radical for the dyeing of nitrogen-containing fibres.


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