Process for dyeing wool and blends thereof with other fibres using reactive dyes and colorless fiber-reactive dyeing assistant
AssigneeCiba-Geigy Corporation
InventorsGerhard Back, Klaus Hannemann, Josef Koller
Life of this patent
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Abstract
A process is described for fibre- and surface-level dyeing of wool and blends thereof with other fibers using a compound of formula (1) ##STR1## in which n is 0 or 1, and if n is 1, A is a radical of the formula ##STR2## and B is an alkylene or alkenylene group or a direct bond, or if n is zero, A is a compound of the formula ##STR3## Fibre- and surface-level dyeings, in particular in light to medium color shades are obtained by the dyeing process according to the invention. The dyeing aid according to this invention can be used to substitute formaldehyde containing wool dyeing aids.
Claims14
A process for non-skittery and level dyeing of wool or a blend thereof with other fibres using reactive dyes, which comprises using an aqueous liquor which comprises at least one colourless, fibre-reactive compound of the formula ##STR55## in which n is 0 or 1, and if n is 1, A is a radical of the formula ##STR56## and B is an alkylene or alkenylene group or a direct bond, or if n is zero, A is a compound of the formula ##STR57## in which, in the formulae (1) to (4), R.sub.1 is a radical of the formula ##STR58## in which Hal is halogen, R is hydrogen or halogen, n.sub.1 is 1 or 0, R.sub.2 is hydrogen, SO.sub.3 M or --NH.sub.2, R.sub.3 is hydrogen, SO.sub.3 M or a radical of the formula --OX, in which X is hydrogen or C.sub.1 to C.sub.4 alkyl, R.sub.4 is hydrogen, SO.sub.3 M or a radical of the formula ##STR59## M is hydrogen, an alkali metal or ammonium, and the compound of the formula (4) contains at least one --SO.sub.3 M group, for dyeing these materials and finishing the dyeing at a pH of 4.0 to 5.0, regardless of the depth of shade.
A dyeing assistant which comprises at least one colourless fibre-reactive compound of the formula ##STR64## in which n is 0 or 1, and if n is 1, A is a radical of the formula ##STR65## and B is an alkylene or alkenylene group or a direct bond, or if n is zero, A is a compound of the formula ##STR66## in which, in the formulae (1) to (4), R.sub.1 is a radical of the formula ##STR67## in which Hal is halogen, R is hydrogen or halogen, n.sub.1 is 1 or 0, R.sub.2 is hydrogen, SO.sub.3 M or --NH.sub.2, R.sub.3 is hydrogen, SO.sub.3 M or a radical of the formula --OX, in which X is hydrogen or C.sub.1 to C.sub.4 alkyl, R.sub.4 is hydrogen, SO.sub.3 M or a radical of the formula ##STR68## M is hydrogen, an alkali metal or ammonium, and the compound of the formula (4) contains at least one --SO.sub.3 M group, and a carrier.
Dependencies are inferred from the claim text.