Patent number: 3932414
Abstract: Disclosed are pigments of formula I ##SPC1##in whichThe R.sub.1 's, independently, each signify hydrogen, halogen, nitro, cyano, methyl, alkoxy, aminocarbonyl, alkylcarbonylamino, benzoylamino, phenylaminocarbonyl, alkylamino or phenylamino,The R.sub.2 's, independently, each signify hydrogen, halogen or methyl,The R.sub.3 's, independently, signify hydrogen or halogen, andR.sub.4 signifies a direct bond or a group --R.sub.5 --NH--, in which the imino group is bound to nucleus A, and R.sub.5 signifies a 1,3- or 1,4-phenylene radical, unsubstituted or substituted by up to two substituents selected from halogen, methyl, alkoxy and nitro; or a radical ##SPC2##in which X signifies a direct bond, --O--, --SO.sub.2 --, --N=N-- or --NHCO-- and rings B and C are unsubstituted or substituted by up to two substituents selected from halogen, methyl, alkoxy and nitro,And their use in pigmenting synthetic plastics and resins and paper and as colorants in surface coating media such as paints, lacquers and printing inks.
Type:
Grant
Filed:
April 1, 1974
Date of Patent:
January 13, 1976
Assignee:
Sandoz Ltd., (Sandoz AG)
Inventors:
Rodolf Altiparmakian, Hans Bohler