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1. (WO2018203746) ONE-POT SYNTHESIS OF REACTIVE DEEP BLACK

Pub. No.:    WO/2018/203746    International Application No.:    PCT/NL2018/050287
Publication Date: Fri Nov 09 00:59:59 CET 2018 International Filing Date: Wed May 02 01:59:59 CEST 2018
IPC: C09B 67/22
C09D 11/328
Applicants: SPGPRINTS B.V.
Inventors: VRIEZEMA, Dennis Manuel
KLEINE, Sigrid Elisabeth
SMALLEGANGE, Martin Jan
Title: ONE-POT SYNTHESIS OF REACTIVE DEEP BLACK
Abstract:
The invention relates to a one-pot synthesis for preparing an aqueous reactive black mixture, comprising the following steps a) - e): a) dissolving 2-[(4-aminophenyl)sulfonyl]ethanesulfonic acid (vinyl sulphone parabase ester) in water; b) diazotizing the dissolved vinyl sulphone parabase ester using excess nitrous acid or using excess nitrite and an acid, resulting in a diazonium salt and remaining nitrous acid; c) quenching the remaining nitrous acid with sulfamic acid; d) coupling the diazonium salt of step c) with 4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid (H-acid) until the reaction is complete, resulting in Reactive Black 5 (RB 5) and remaining diazonium salt, e) coupling the remaining diazonium salt with 7-acetamido-4-hydroxy-2-naphthalenesulfonic acid (acetyl-J-acid) until the reaction is complete resulting in Reactive Orange 78 (RO 78); and f) obtaining the aqueous reactive black mixture, wherein steps a) to e) are performed without intermediate purification and at least steps d) and e) are performed under high shear mixing conditions, and the combined concentration of RB 5 and RO 78 at the end of step e) is higher than 0.1 mol/L.