C - Chemistry – Metallurgy – 09 – B
Patent
C - Chemistry, Metallurgy
09
B
C09B 31/02 (2006.01) C09B 29/01 (2006.01) C09B 41/00 (2006.01) C09B 44/06 (2006.01) C09B 67/34 (2006.01) C09B 69/06 (2006.01)
Patent
CA 2424959
A process for preparing liquid formulations of dyes of the general formula I (see formula I) where Y is chlorine or bromine, Z is hydrogen, chlorine, bromine, sulfonic ester, nitro or optionally substituted sulfamoyl, X is -O- or (see formula II) R is alkylene optionally interrupted by oxygen, (see formulas III or IV) m is 1 or 2, n is 0 or 1, p is 0, 1 or 2, An.THETA. is the equivalent of an anion, R1 and R2 are independently hydrogen, optionally substituted alkyl, alkenyl, cycloalkyl, aralkyl or aryl or combine with the joining nitrogen to form a heterocycle, R3 is hydrogen or optionally substituted alkyl, B is hydrogen or C1- to C4-alkyl, B1 is hydrogen, hydroxyl, C1- to C4-alkoxy or C1- to C4-alkyl, where R4 is optionally substituted alkyl and R5 is hydrogen or C1- to C4-alkyl, and the radical Image may also be an optionally substituted piperazine radical, by diazotizing an amine of the formula II Image and then coupling the diazonium salt onto a compound of the formula III Image and also optionally adding solubilizing additives, comprises effecting said diazotizing at a pH set to an acidic value using pure methanesulfonic acid or at least 20 mol% mixtures of methanesulfonic acid in monobasic acids.
Merger Roland
Schmitt Michael
Tresch Rainer
Basf Aktiengesellschaft
Robic
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