Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Novartis AG
BASF Schweiz AG
Original Assignee
Ciba Geigy AG
Ciba AG
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Filing date
Publication date
Application filed by Ciba Geigy AG, Ciba AGfiledCriticalCiba Geigy AG
Priority to ES225331ApriorityCriticalpatent/ES225331A1/en
Publication of ES225331A1publicationCriticalpatent/ES225331A1/en
Procedure for the preparation of chromium azo dyes containing a chromium atom in complex bond with two molecules of different monoazo dyes free of sulfonic acid groups by reaction of chromium-releasing media on dyes free of sulfonic acid group containing complex-forming groups characterized because it is reacted as starting materials mixtures of metallizable monoazo dyes one of which corresponds to the formula ** (see formula) ** above all such mixtures that in addition to a monoazo dye of the indicated formula contain an o'-dioximonoazo dye free of sulfonic acid groups and carboxyl groups or a o-carboxy-o'-oxymonoazo dye free of sulfonic acid groups and of carboxyl groups that are not found ortho to the azo group. (Machine-translation by Google Translate, not legally binding)
ES225331A1955-12-011955-12-01A procedure for the preparation of chromed azocolorants (Machine-translation by Google Translate, not legally binding)
ExpiredES225331A1
(en)