Process for printing or pad dyeing of textile material made from cellulose fibres, or from mixtures thereof with synthetic fibres
AssigneeCiba-Geigy Corporation
InventorsZdenek Koci, Andres Schaub
Life of this patent
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Abstract
Dyes difficultly soluble or insoluble in water are used together with specific auxiliaries to dye or print textile material made from cellulose fibres, or mixtures thereof with synthetic fibres. These auxiliaries effect an increased dye yield, particularly on the cellulose material, and level tone-in-tone dyeings on mixed fabrics.
Claims23
A process for printing or pad-dyeing textile material made from cellulose fibers, or mixtures thereof with synthetic fibers, comprising the steps of impregnating the fibers, either simultaneously or successively, with (i) an aqueous dispersion of at least one dye which is difficultly soluble or insoluble in water and (ii) an aqueous solution of an auxiliary, and subsequently subjecting the impregnated fibers to a dye-fixing heat treatment, wherein the auxiliary is a mixture or a complex of a lactam of the formula ##STR15## wherein n is an integer from 3 to 6, and a polyalkylene glycol of the formula ##STR16## wherein R.sub.1 is hydrogen, methyl or ethyl, and y is an integer from 3 to 25.
A printing paste or padding liquor which contains water, a dye difficultly soluble or insoluble in water, and an auxiliary which is a mixture or a complex of a lactam of the formula ##STR17## wherein n is an integer from 3 to 6, and a polyalkylene glycol of the formula ##STR18## wherein R.sub.1 is hydrogen, methyl or ethyl, and y is an integer from 3 to 25.
Dependencies are inferred from the claim text.