ES358177A1 - Procedure for the preparation of disazous coloring pigments. (Machine-translation by Google Translate, not legally binding)
- Google Patents
Procedure for the preparation of disazous coloring pigments. (Machine-translation by Google Translate, not legally binding)
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.)
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Novartis AG
BASF Schweiz AG
Original Assignee
Ciba Geigy AG
Ciba AG
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Publication date
Priority claimed from CH1291867Aexternal-prioritypatent/CH496066A/en
Application filed by Ciba Geigy AG, Ciba AGfiledCriticalCiba Geigy AG
Publication of ES358177A1publicationCriticalpatent/ES358177A1/en
Procedure for the preparation of disazo dye pigments, of the formula **(See formula)** in which R1 signifies an aryl radical; R2 means a naphthalene radical in which the azo group, the hydroxy group and the carbonamide group are in position 1, 2, 3; and R3 means an arylene radical, characterized by heating a diazoamine compound containing the radical R1 with a bis-naphthol of the formula **(See formula)** in an organic-aqueous solvent, in the presence of an organic acid. (Machine-translation by Google Translate, not legally binding)
ES358177A1967-09-151968-09-14Procedure for the preparation of disazous coloring pigments. (Machine-translation by Google Translate, not legally binding)
ExpiredES358177A1
(en)