Patent ID: 6869453

Claim:
A reactive dye compound comprising: (a) at least one chromophore moiety; (b) at least one nitrogen-containing heterocycle; (c) a linking group, L, to link each chromophore moiety to each nitrogen-containing heterocycle; characterised in that at least one nitrogen-containing hetercycle is substituted with at least one Y group wherein Y is a phosphonate or a borate derivative, wherein the phosphonate derivative is selected from one of: —O—(PO)(OH)C(CH 3 )(OH)(PO)(OH) 2 , and —O—(P═O)(OH)R′ wherein R′ is any suitable nucleophilic moiety, under the proviso that R′ is not OH; wherein L is selected from the group consisting of NR, N(C═O)R, and N(SO 2 )R; wherein R is H or C 1 -C 4 alkyl, which further can be substituted by halogen, hydroxyl, cyano, C 1 -C 4 alkoxy, C 2 -C 5 alkoxycarbonyl, carboxyl, sulfamoyl, sulfo, sulfato.