CAS: 10141-00-1; Chromium Potassium Sulfate

专利信息

专利号:US-4820309-A
优先权日:1987-03-05
标题 :1:2-chromium complex dyes for tanned leather
发明人：HOLLIGER HERBERT
权利人:SANDOZ LTD
摘要:Complexes of the formula ##STR1## wherein each R 1 is independently (a) the radical of a coupling component of the active methylene non-cyclic or homocyclic series, (b) the radical of a coupling component of the heterocyclic series or (c) the radical of a coupling component of the monocyclic benzene series, n with the proviso that at least one R 1 is the radical of a coupling component of the active methylene non-cyclic or homocyclic series, n each R 2 is independently hydrogen, C 1-4 alkyl or --SO 2 NR 4 R 5 , n each R 3 is independently hydrogen, halo, C 1-4 alkyl or --SO 2 NR 4 R 5 , and n each M and M 1 is independently hydrogen or a cation, n wherein each R 4 is independently hydrogen, C 1-4 alkyl or C 2-3 hydroxyalkyl, and n each R 5 is independently hydrogen, C 1-4 alkyl, C 2-3 hydroxyalkyl, cyclohexyl, cyclohexyl substituted by methyl, phenyl or phenyl substituted by methyl, with the proviso that at least one of Ring A and R 1 of each disazo ligand bears an --SO 2 NR 4 R 5 group, n and mixtures of such or containing such complexes, the use of such complexes and mixtures for dyeing substrates dyeable with anionic dyes (e.g., tanned leather and pelts), substrates dyed therewith, processes for synthesizing such complexes and mixtures and disazo compounds useful in their synthesis.