Process for dyeing cellulosic textile materials
AssigneeCiba-Geigy Corporation
InventorsCarl A. Jaeger, Hans-Ulrich Berendt, Paul Schafer
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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, by a non-pad method, 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 preferably stored cold, to fix the dyes. This dyeing process affords dyeings with excellent penetration of the fabric and with level depth of shade from edge to edge.
Claims18
A process for dyeing cellulosic textile fabric with substantive or reactive dyes, which comprises impregnating said fabric with an aqueous dye liquor by a non-pad method and fixing the dyes by means of a heat treatment or by the cold pad-batch method, said dye liquor containing, in addition to dyes, a homopolymer or copolymer of acrylamide or methacrylamide, or a graft polymer of an adduct of an alkylene oxide and an at least trihydric aliphatic alcohol containing 3 to 10 carbon atoms and acrylamide or methacrylamide.
Dependencies are inferred from the claim text.