NOVEL DISAZOIC COMPOUNDS EXEMPT FROM SULFO GROUPS, THEIR PREPARATION AND THEIR USE AS COLORANTS

摘要

THE INVENTION CONCERNS DISAZOIC COMPOUNDS EXEMPTED FROM SULFO GROUPS OF THE FORMULA: BR/ (CF DRAWING IN BOPI) BR/ AND THEIR 1: 1 OR 1: 2 METAL COMPLEXES, FORMULA IN WHICH THE SYMBOLS MEAN VARIOUS SYMBOLIC REMAINS , THE TWO PYRIDONE REMNANTS OF THE MOLECULE BEING IDENTICAL. /P P THESE COMPOUNDS CAN BE USED AS COLORANTS, ESPECIALLY FOR COLORING PAPER.