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
Priority claimed from CH1036969Aexternal-prioritypatent/CH519561A/en
Application filed by Ciba Geigy AG, Ciba AGfiledCriticalCiba Geigy AG
Publication of ES381523A1publicationCriticalpatent/ES381523A1/en
Process for the preparation of disazo pigments of the formula ** (see formula) ** In which R1 means a benzene radical having a hydrogen atom or an alkyl group ortho to the azo group; R2 means a naphthalene radical in which the azo, hydroxyl and co groups are in the 1,2,3 position; R3 means a hydrogen atom or an alkyl, cycloalkyl, aralkyl or aryl radical; R4 means a hydrogen atom or an alkyl or cycloalkyl radical; X means a hydrogen or halogen atom or an alkyl or methoxy group; E And it means a hydrogen or halogen atom or a methoxylic group, Characterized by: A) a carboxylic acid halide of the formula ** (see formula) ** With a diamine of the formula ** (see formula) ** In the molar ratio of 2: 1; O well B) copying a diazo or diazoamine compound of an amine of the formula H2n-r1-conr3r4 With a dinaphthene of the formula ** (see formula) ** In the molar ratio of 2: 1. (Machine-translation by Google Translate, not legally binding)
ES381523A1969-07-081970-07-07Procedure for the preparation of disazoic pigments. (Machine-translation by Google Translate, not legally binding)
ExpiredES381523A1
(en)