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 CH1851368Aexternal-prioritypatent/CH508019A/en
Application filed by Ciba Geigy AG, Ciba AGfiledCriticalCiba Geigy AG
Publication of ES374431A1publicationCriticalpatent/ES374431A1/en
Procedure for the preparation of azo pigments of the formula ** (see formula) ** In which R1 means an aromatic radical; R2 means a naphthalene radical in which the azo group, the hydroxyl group and the -co group are in the 1,2,3 position; R3 means an arylenic radical, X means a direct link or a group -co; Y R4 means a carbamide group, an acylaminic group, an acyl radical or a carhoalkoxyalkyl radical, in the case where x represents a direct bond; while r 4 means an alkyl or aryl group provided that x represents a -co group. Characterized by: A) a carboxylic acid halide of the formula ** (see formula) ** With an amine of the formula H2n-r3-x-nhconh-r4 O well B) copying a diazoic or diazoamine compound of an aromatic amine with a coupling compound of the formula (see formula) (Machine-translation by Google Translate, not legally binding)
ES374431A1968-12-121969-12-11Procedure for the preparation of azoic pigments. (Machine-translation by Google Translate, not legally binding)
ExpiredES374431A1
(en)