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 CH1785568Aexternal-prioritypatent/CH508018A/en
Application filed by Ciba Geigy AG, Ciba AGfiledCriticalCiba Geigy AG
Publication of ES374059A1publicationCriticalpatent/ES374059A1/en
Process for the preparation of disazo dye pigments of the formula ** (see formula) ** In which R1 means an arylenic radical in which the carbonamide group is ortho to the azo group; R2 means a naphthalene radical in which the azo group, the hydroxy group and the carbonamide group are in the 1,2,3 position; R3 means an arylenic radical; y R4 means a hydrogen atom or an alkyl, cycloalkyl, aryl, aralkyl or heterocyclic radical; Characterized by condensing a carboxylic acid halide of the formula ** (see formula) ** Where R1 and r4 have the meaning that has already been stated, While R2 means a naphthalene radical in which the azo group, the hydroxyl group and the carboxyl halide group are in the 1,2,3 position, With an arylenediamine, in the molar ratio of 2: 1. (Machine-translation by Google Translate, not legally binding)
ES374059A1968-11-301969-11-29Procedure for the preparation of disazoic dye pigments. (Machine-translation by Google Translate, not legally binding)
ExpiredES374059A1
(en)