| abstract |
Catechol metal complex compounds of formula (I), wherein R 1 and R 2 independently of one another represent a hydrocarbon radical having 1 to 20 carbon atoms, which is hydroxyl, (C 1 -C 4 )-alkoxy, ( optionally substituted with at least one radical selected from C 1 -C 4 )-alkoxy(CH 2 CH 2 O) n -, -NR'R" or -N + R'R"R"' X -, where n = 1 to 10, R′, R″ and R″′ independently of each other represent H or a linear or branched aliphatic hydrocarbon radical having 1 to 3, preferably 1 to 2 carbon atoms, X − is an anion represents, Z 1 and Z 2 represent independently of each other OH or O − , M represents a transition metal or a metal cation of a lanthanoid (especially Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn , Fe, Ru, Co, Ni, Cu, Zn, Ce or Sm), q represents the number of charges of the metal cation M, 2, 3 or 4, and p represents the charge of the catechol ligand The catechol metal complex compound, wherein the number represents the number 0, 1 or 2, and r represents the number 1, 2, 3 or 4 is colored and can be used for coloring surfactant compositions. Laundry detergents containing cole metal complex compounds do not result in textile discoloration even after repeated use. |