Patent ID: 6126700
Filing Date: 2000-10-03
Classification: C09B

Abstract:
A black dye composition comprising:(a) a black reactive dye of the formula (I); ##STR12## (b) at least a black or blue reactive dye with a good fastness of oxidative bleach and wash fastness, said black or blue reactive dye is selected from the group consisting of formula (III) ##STR13## wherein Y and Y' each independent is --SO.sub.2 X, X is --CH.dbd.CH.sub.2, --C.sub.2 H.sub.4 OSO.sub.3 H or --C.sub.2 H.sub.4 Cl, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each independent is hydrogen, halogen, C.sub.1 -C.sub.4 alkyl C.sub.1 -C.sub.4 alkoxyl, or sulfonyl groups and at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 in formula III is other than hydrogen, or formula (IV) ##STR14## wherein Y, Y' and R.sub.1 are defined as the above; and (c) at least a red, orange, yellow or other shade of reactive azo dye, said red, orange, yellow or other shade of reactive azo dye is selected from the group consisting of formula (V) formula (VI), formula (VII), formula (VIII), formula (IX), ##STR15## wherein D is ##STR16## X and T are defined as the above, ##STR17## wherein Y is defined as the above, n is 1, 2, or 3, A is --OH, --NH.sub.2, or --CH.sub.3, ##STR18## wherein Y, R.sub.1, and R.sub.2 are defined as the above, R.sub.6 is --CO.sub.2 H, --NH.sub.2, or --CH.sub.3, ##STR19## wherein Y, R.sub.1, R.sub.2 and A are defined as the above, Q is --CO.sub.2 H, or --SO.sub.3 H, ##STR20## wherein Y, R.sub.1, and R.sub.2 are defined as the above, R.sub.7 and R.sub.8 each independent is hydrogen, C.sub.1 -C.sub.4 alkyl, amino or amino derivatives,wherein the composition exhibits improved fastness to oxidative bleaching than the same composition without the dye of formula III or IV.