Process for aftertreating dyed or printed textile materials

Process for aftertreating dyed or printed textile materials made of polyester fibres, polyester/ôcellulose fibre blends, cellulose triacetate fibres or cellulose triacetate/ôcellulose fibre blends by dyeing or printing the polyester fibres and the cellulose triacetate fibres with disperse dyes based on azo compounds and the cellulose fibres with the dyes customary therefor, reduction clearing as usual, then applying to the textile material a polymeric compound (I) which contains units where R is H, CH3, C2H5 or aryl and a catalyst based on an organic metal compound which is a curing agent for the compounds (I), and treating the textile material at temperatures from 100 to 220 DEG C.