Phenyl-substituted phthalazone azo dyes with a coupling component of the phenol, napthol, acetoacetarylide, pyrazolone, quinolone, pyridine, pyrimidone or isoquinolone series

摘要

Azo dyes having a phenyl-substituted phthalazone as the diazo component and a coupling component containing a hydroxy group or an enolizable keto group, said coupling component being selected from the phenol, naphthol, acetoacetarylide, pyrazalone, quinolone, pyridone, pyrimidone or isoquinolone series. The dyes have pigmentary character with good light fastness and also fastness to overcoating, migration and overspraying, and are thus eminently suitable for the coloring of printing inks, surface coatings and plastics, such as polyvinyl chloride or polyester fibers, the pigments being substantially insoluble in solvents and further exhibiting resistance to high temperatures and fastness to weathering.