| abstract |
Teal couplers of the formula <IMAGE> R = ballast group X = H or escape group Y = halogen, alkyl, alkoxy, aryl or alkylthio which can be split off in the color coupling have n = 0-2 (if n = 2, the radicals Y can be the same or different) good dark fading stability of the coupled dye, furthermore low secondary color densities and a sufficiently long wavelength absorption maximum, which is independent of the density, after all they have high coupling activity and good solubility in high-boiling solvents. |