Toyo Ink Manufacturing Company

Yoshiyuki Nonaka

Michichika Hikosaka

Junichi Tsuchida

Masami Shirao

Toshiro Notoji

A process for the production of a halogenated phthalocyanine, in which a solvent can be easily recovered and the halogenated phthalocyanine has reduced residual metal amount, the process comprising forming a complex of aluminum chloride and phthalocyanine in sulfonyl chloride and then halogenating the phthalocyanine.

Process for the production of halogenated phthalocyanine

A process for the production of a halogenated phthalocyanine, in which a solvent can be easily recovered and the produced halogenated phthalocyanine has a reduced residual metal amount, the process comprising forming a complex of aluminum chloride and phthalocyanine in a halogenated hydrocarbon and then halogenating the phthalocyanine.

A process for producing a polyhalogenated phthalocyanine containing not more than 0.02 part by weight of water-insoluble inorganic impurities derived from aluminum chloride per 100 parts by weight of phthalocyanine before halogenation, which comprises the following steps A, B and C;

Process for producing polyhalogenated phthalocyanine

A process for producing a pigment composition containing a highly halogenated copper phthalocyanine, produced by halogenation of copper phthalocyanine in the presence of chlorosulfonic acid, titanium tetrachloride or a mixture of titanium tetrachloride with aluminum chloride, a highly halogenated copper phthalocyanine produced by halogenation of a copper phthalocyanine in a solid powder state, or a highly halogenated copper phthalocyanine produced by cyclization. The composition further contains at least one highly halogenated different-metalo-phthalocyanine selected from highly halogenated metalo-phthalocyanines each of which has Al, Mg, Si, Ti, V, Mn, Fe, Co, Ni, Zn, Ge or Sn as a central metal.

Process for producing phthalocyanine pigment composition containing

A polyhalogenated phthalocyanine obtained by halogenation of phthalocyanine in the presence of aluminum chloride and contains not more than 0.02 part by weight, per 100 parts by weight of the phthalocyanine before the halogenation, of water-insoluble inorganic impurities derived from the aluminum chloride contributes to improvement of a printing ink in form plate abrasion properties.

Polyhalogenated phthalocyanine, process for the production thereof, and

Provided according to this invention is a process for the halogenation of copper phthalocyanine in titanium tetrachloride in the presence of aluminum chloride, which comprises preliminarily stirring both a part or all of the aluminum chloride and the copper phthalocyanine in titanium tetrachloride at not less than 50.degree. C. and carrying out the halogenation reaction, provided that when the part of the aluminum chloride is added for the preliminary stirring, the remaining portion of the aluminum chloride is added during the halogenation reaction.

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Tokyo, Japan

Yoshiyuki Nonaka