| 摘要 |
PURPOSE:To provide a new compound exhibiting a dark violet color or black color, excellent in water solubility, heat resistance, alkali resistance and chemical stability, and useful as a recording material, etc. CONSTITUTION:Compounds of formulas I and II (M is metal, metal oxide, metal halide; X is hydrogen ion, cation). For example, copper phthalocyanine heptacarboxylic acid. The compounds of formulas I and II are obtained e.g. by heating in urea pyromellitic anhydride and trimellitic anhyhdride in the presence of a metal chloride and ammonium molybdate. |
