| abstract |
Compounds of the general formula vorin R 1 and R 2 are the same or different and hydrogen, chlorine or bromine, methyl, ethyl, methoxy, ethoxy or nitro and K mean the same or different residues of enolizable ketomethylene compounds which do not contain any water-solubilizing groups are obtained if one an equivalent of that obtained by bisdiazotizing the oiamine of the formula The bisdiazonium compound obtained, in which R 1 and R 2 have the meaning given above, couples with 2 equivalents of one or more compounds of the formula KH, where K has the meaning given above. These disazo compounds are pigments of high color strength and good migration, light, heat and chemical fastness properties. |