Patent ID: 6039768
Filing Date: 2000-03-21
Classification: D06P,Y10S

Abstract:
A process for fixing reactive or substantive dyes on cellulosic fibre material, which process comprises treating the fibre before, during or after dyeing in a temperature range from 20 to 70.degree. C. with a liquor comprising a homo- or copolymer containing repeating structures of formula ##STR40## wherein R.sub.1 is C.sub.1 -C.sub.12 alkyl which is unsubstituted or substituted by hydroxy, carboxy, cyano, carbamoyl, a radical --CONH--(alk)--T, N,N-di-C.sub.1 -C.sub.4 alkylcarbamoyl, aminophenylsulfonyl, amino or radical --NHR.sub.3, --N(R.sub.3).sub.2, --N(R.sub.3).sub.3.sup.+ Y.sup.-, --COO--(alk)--T or ##STR41## T is hydrogen or a radical --NH.sub.2, --NHR.sub.3, --N(R.sub.3).sub.2, --N(R.sub.3).sub.3.sup.+ Y.sup.-,R.sub.3 is C.sub.1 -C.sub.8 alkyl,Y.sup.- is an anion,(alk) is a straight-chain or branched C.sub.1 -C.sub.10 alkylene radical, andR and R.sub.2 are each independently of the other hydrogen or benzyl or independently have one of the meanings given above for R.sub.1, ora copolymer containing repeating structures of formula ##STR42## which is obtained by polymerising 80 to 20 mol % of vinylimidazole and 20 to 80 mol % of N-vinylformamide or N-vinylpyrrolidone, or by polymerising N-vinylimidazole, N-vinylpyrrolidone and N-vinylformamide, and where required, with subsequent hydrolysis, or mixtures thereof.