| 摘要 |
1. A method of producing chromo complex dyes of the 1:2 type with the general formula 1, in which A stands for the residue with the general formula 2, in which R1 stands for hydrogen atom or nitro group, A' stands for the residue with the general formula 3, in which R2 stands for hydrogen or chloride atom or nitro group, B stands for the residue with the formula 4, and Y stands for the atom of hydrogen, sodium or potassium or ammonium group, by way of coupling 1-azo-2-oxynaphthalenesulfonic-4 acid or 1-azo-2-oxy-6-nitronaphthalenesulfonic-4 acid in water medium with 1-phenylo-3-methylpyrazonole-5 and carrying out the produced monoazo dye with the general formula HA-N=N-BH, in which the symbols have the above mentioned meaning, with the use of trivalent chromium salt used in the amount not lesser than 1 molar mass of chromium for 1 mole of monoazo dye in acidified water medium, into chromo complex dye of 1:1 type with the general formula 5, in which A and B have the above mentioned meaning, and X stands for the anion Cl<->, SO4<-->, H2SO4<-> or HCOO<-> and the condensation of the produced dye with the formula 5 with a monoazo dye with the general formula HA-N=N-BH, in which the symbols have the above mentioned meaning, produced by coupling 1-azo-2-oxybenzene, 1-azo-2-oxy-4-nitrobenzene, 1-azo-2-oxy-5-nitrobenzene or 1-azo-2-oxy-5-chlorobenzene in water medium with 1-phenyl-3-methylpyrazonole-5 characterised in that the mixture containing the suspensions of 1-azo-2-oxynaphthalenesulfonic-4 acid or 1-azo-2-oxy-6-nitronaphthalenesulfonic-4 acid and the acidic form of 1-phenyl-3-methylpyrazonole-5 are subjected, possibly in the presence of hydrotropic agents,...<IMAGE>
|
