Fixing substantive dyes to cellulosic fabrics

摘要

Process for fixing substantive dyes onto cellulose-containing fibre materials comprises treating the fibre material before, during or after dyeing in a liquor containing a homo- or copolymer obtained by polymerisation of N-vinylformamide or N-vinylacetamide and optionally one or more copolymerisable monomers selected from allylamine or diallylamine derivatives, (meth)acrylic acid, maleic acid, N-vinylpyrrolidone, N-vinyl-N- methyl-formamide, N-vinyl-N-methylacetamide, N-vinyl-N-ethyl- acetamide, vinyl acetate, vinyl propionate, hydroxy-C2-C4- alkyl(meth)acrylate, (meth)acrylic acid-C1-C22-alkyl ester, (meth)acrylonitrile, (meth)acrylamide, N-mono/N,N-di-C1-C10- alkyl-(meth)acrylamide and N,N-di-C1-C2-alkylamino-C2-C4- alkyl-(meth)acrylate and subsequent hydrolysis of the (co)polymer.