Patent ID: 7553359

Claim:
A concentrated aqueous solution, comprising the salt or the free acid or mixtures thereof, of at least one anionic dye of the formula wherein D is a radical of the formula (a) wherein R 1 , R 2 , R 3 , are independently H; C 1-4 alkyl; C 1-4 alkoxy, —SO 3 H; —OH or —CN; or independently —SO 2 —Y or —O—Y, wherein Y is an unsubstituted C 1-4 -alkenyl group or an unsubstituted C 1-4 alkyl group or wherein Y is an NC—, HO—, HOSO 3 —, halogen-substituted C 1-4 -alkenyl group or an NC—, HO—, HOSO 3 —, halogen-substituted C 1-4 alkyl group or Y is —NR 11 R 12 wherein R 11 and R 12 are independently H, C 1-4 alkyl or substituted C 1-4 alkyl or combine with the interjacent nitrogen to form a five- or six-membered ring optionally comprising one or two or three heteroatoms, in which case the heterocyclic ring is unsubstituted or the heterocyclic ring is substituted by one or two C 1-4 alkyl groups, or D is a bicyclic ring system unsubstituted or substituted with C 1-4 alkoxy, —SO 3 H; —OH or —CN; or independently —SO 2 —Y or —O—Y, wherein Y is an unsubstituted C 1-4 -alkenyl group or an unsubstituted C 1-4 alkyl group or wherein Y is an NC—, HO—, HOSO 3 —, halogen-substituted C 1-4 -alkenyl group or an NC—, HO—, HOSO 3 —, halogen-substituted C 1-4 alkyl group or Y is —NR 11 R 12 where R 11 and R 12 are each as defined above, wherein each of the rings are, optionally, and independently a five-membered or six-membered ring, wherein the five- or six-membered rings, optionally include one or two or three heteroatoms and this bicyclic ring system is not further substituted by substituents attached via azo groups, and M is a bridging phenyl group unsubstituted or substituted by C 1-4 alkyl, C 1-4 alkoxy, hydroxyl, carboxyl, sulpho, cyano or halogen, and when n=1, B is hydrogen, an unsubstituted aryl radical, a substituted aryl radical, or a substituted triazine derivative of the formula wherein X 1 and X 2 are independently unsubstituted amine —NH 2 or substituted amine —NR 21 R 22 wherein R 21 and R 22 are independently: H, C 1-4 alkyl or substituted C 1-4 alkyl, or combine with the interjacent nitrogen to form a five- or six-membered ring optionally comprising one or two or three heteroatoms, in which case the heterocyclic ring is unsubstituted or the heterocyclic ring is substituted by one or two C 1-4 alkyl groups or when n=2, B is a bridge of the formula or a bridge of the formula where X 1 is defined above and 2-(2-butoxyethoxy) ethanol.