After treating composition for direct or reactive dyeings on cellulose

Claim 1

A composition useful as an aftertreatment agent for improving the fastness of a dyeing, printing or optical brightening on a hydroxy group-containing fibrous substrate which composition comprises (1) a mixture of (A) and (C), (2) a mixture of (A), (B) and (C), (3) a precondensate prepared by reacting (A) with (B) in the presence of (C), or (4) a mixture of (C) and a precondensate prepared by reacting (A) with (B) in the absence of (C), wherein (A) is a linear or crosslinked polymer comprising repeating units of the formula I" or I"', (B) is an N-methylol derivative of a urea, melamine, guanamine, triazinone, urone, carbamate or acid amide; and (C) is a catalyst for the cross-linking of N-methylol compounds of the type (B) above, with the proviso that in the composition of type (1) component (A) comprises repeating units of formula I"', said formulae I" and I"' being as follows: ##STR32## wherein X 1 ' is C 2-12 alkylene, ##STR33## and each y, independently, is 2-4, and --W--Y--Z--Y--W--X.sub.1 ] I"' in which each W independently is ##STR34## in which each R, independently, is C 5-6 cycloalkyl; C 1-20 alkyl; C 1-20 alkyl monosubstituted by --OH, --CN, R 1 O--R 1 S--, R 1 CO--, or --CON(R 2 ) 2 ; C 1-4 alkyl monosubstituted by --COOH or arylsulphonyl or mono- or di-substituted by --COOR 1 ; phenyl or benzyl unsubstituted or substituted by up to 3 groups selected from R 1 --, R 1 O--, --OH, --CN, halogen and --COOH; or both groups R on a single nitrogen atom, together with the nitrogen atom to which they are attached, form a 5- or 6-membered ring; R 1 is C 1-4 alkyl; R 2 is hydrogen, C 1-4 alkyl or C 1-4 alkyl monosubstituted by --OH, aryl or C 1-4 alkoxy; X 1 is a divalent bridging group, each Y, independently, is arylene, aralkylene, alkarylene, oxyarylene or C 1-15 alkylene, which may be interrupted by up to 7 oxygen or 3 quaternary nitrogen atoms and may be substituted by up to 3 --OH or --OR 1 groups, and Z is a bridging group of formula (e) or (f) ##STR35## in which R 5 is a direct bond, C 1-12 alkylene, C 1-12 alkylene interrupted by up to 3 N or O atoms, arylene, diaminoarylene or dioxyarylene, R 6 is C 1-12 alkylene or C 2-12 alkylene interrupted by up to 3 N, O or S atoms, R 7 is arylene, R 8 is C 1-12 alkylene or arylene, and each R 9 independently is hydrogen, C 1-20 alkyl, unsubstituted or substituted by up to 3 hydroxy, C 1-4 alkoxy or halogen groups, ##STR36## in which Y and R are as defined above and R 10 is C 1-20 alkyl which may be unsubstituted or substituted by up to 3 hydroxy or halogen groups and/or may be interrupted by up to 3 --O--, --S--, --NR 11 -- or --N.sup.⊕ (R 1 ) 2 -- groups, where R 11 is hydrogen or C 1-4 alkyl.