ES264105A1 - Procedure for the preparation of azocolorants that contain metal (Machine-translation by Google Translate, not legally binding)
- Google Patents
Procedure for the preparation of azocolorants that contain metal (Machine-translation by Google Translate, not legally binding)
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Novartis AG
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Ciba Geigy AG
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Publication of ES264105A1publicationCriticalpatent/ES264105A1/en
Procedure for the preparation of metal-containing azo dyes, especially for the preparation of chromium and cobalt-containing dyes that complexly bond a metal atom in two molecules of different mono-dyes, characterized in that it is reacted with mixtures of two different metal-based monoazo dyes of formulas ** (Formulas) ** in which R1 and R2 stand for o-oxybenzene radicals containing nitro groups that are free of water-solubilizing groups, and in which the acyl radical is free of sulfonic acid and carboxylic acid groups, although otherwise it may be constituted post-statistically, means that yield cobalt and, above all, chromium in such a way that metal-containing azo dyes are formed that contain less than one metal atom per molecule of monoazo dye. (Machine-translation by Google Translate, not legally binding)
ES0264105A1960-01-191961-01-18Procedure for the preparation of azocolorants that contain metal (Machine-translation by Google Translate, not legally binding)
ExpiredES264105A1
(en)