Toyo Ink Manufacturing Company

Yasumasa Suda

Atsushi Endo

Tadashi Ogawa

Toshio Enokida

A process for the production of a metal phthalocyanine excellent in color-related properties such as tinting strength, clearness and hue, in which no reactions of raw materials with a solvent take place and a substance harmful to human bodies such as polychlorinated biphenyl (PCB) is not formed, the process comprising heating phthalic anhydride or phthalimide, urea, metal salt and a catalyst in mixed solvents of chlorinated benzene and a linear hydrocarbon.

Process for the production of metal phthalocyanine

A process for the production of copper phthalocyanine, which overcomes the defect of a method using two reaction steps that since phthalimide formed in the first step adheres to the wall of a reactor and a stirring blade, the reaction in the second step does not smoothly proceed, so that the yield and the purity of the resultant pigment are low, and which process enables the industrially stable production of highly pure copper phthalocyanine at high yields, the process comprising the steps of (A) reacting phthalic anhydride or a phthalic anhydride derivative with ammonia to form phthalimide, (B) adding part or all of urea to the phthalimide obtained in step (A) and melting the mixture under heat to form a homogeneous slurry, and (C) adding copper or a copper compound and remaining urea if any to the slurry obtained in step (B) and forming a copper phthalocyanine or a copper phthalocyanine derivative in the presence of a catalyst.

Process for the production of copper phthalocyanine

A hole-transport material having excellent hole-transport capability and durability, suitable for use in an organic EL device and as an organic photoconductive material, has the formula (1).

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Tokyo, Japan

Yasumasa Suda