| 摘要 |
PURPOSE:To obtain copper phthalocyanine pigment, having bright hue and excellent tinting strength and suitable as a colorant for inks, etc., by the coexistence of a specific compound in reacting phthalic acid (derivative) with urea and copper (compound) in the presence of a catalyst in an organic solvent. CONSTITUTION:Phthalic acid (derivative) (e.g. phthalic anhydride) is reacted with urea and copper (compound) (e.g. cuprous chloride) in the presence of a catalyst (e.g. titanium tetrachloride) in an organic solvent (e.g. sulfolane). In the process, a compound expressed by the formula (M is H or alkali metal; A and B are carboxyl, etc.) (preferably 4-sulfophthalic acid) coexists in an amount of preferably 1-15wt.% based on the phthalic acid (derivative) to readily afford the aimed copper phthalocyanine pigment without passing through a pigment forming step.
|
