Process for pad dyeing cellulosic textile materials
AssigneeCiba-Geigy Corporation
InventorsPaul Schafer, Hans-Ulrich Berendt
Life of this patent
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Abstract
Cellulosic textile material is dyed with substantive dyes or preferably with reactive dyes. Dyeing is carried out by applying to the cellulosic material an aqueous dye liquor which contains, in addition to the dye, a graft polymer which is obtained from an adduct of an alkylene oxide, preferably propylene oxide, with an at least trihydric aliphatic alcohol, e.g. glycerol, and acrylamide or methacrylamide. The cellulosic material is then subjected to a heat treatment, e.g. by steaming or with microwaves, or is stored cold, to fix the dyes. This dye liquor increases the liquor pick-up and thus also increases the dye yield, while at the same time excellent levelness is achieved.
Claims16
A process for dyeing textile materials which consist wholly or partly of cellulose fibres with substantive dyes or reactive dyes, which process comprises padding the cellulosic materials with an aqueous dye liquor which contains, in the addition to the dye, a graft polymer obtained from an adduct of an alkylene oxide with an at least trihydric aliphatic alcohol of 3 to 10 carbon atoms and acrylamide or methacrylamide, and subsequently fixing the dye by a heat treatment or by the cold pad-batch method.
Dependencies are inferred from the claim text.