Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1993-12-06
1996-04-30
Shah, Mukund J.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
540143, 430 78, C09B 4704
Patent
active
055126740
ABSTRACT:
A process for preparing a titanyl phthalocyanine crystal showing at least one diffraction peak at a Bragg angle (2.theta..+-.0.2) of 27.3.degree. is disclosed, which comprises dissolving or suspending titanyl phthalocyanine in concentrated sulfuric acid to form a solution or a slurry and diluting the solution or slurry with an alcohol solvent, an aromatic solvent, a mixed solvent of an alcohol solvent and water, a mixed solvent of an aromatic solvent and water, or a mixed solvent of an alcohol solvent and an aromatic solvent with or without water thereby to precipitate a crystal, and, if desired, treating the precipitated crystal with an alcohol solvent, an aromatic solvent, a mixed solvent of an alcohol solvent and an aromatic solvent or a mixed solvent of an alcohol solvent and/or an aromatic solvent and water. The resulting titanyl phthalocyanine crystal exhibits high photosensitivity and excellent durability as a photoconductive material of an electrophotographic photoreceptor.
REFERENCES:
patent: 3265699 (1966-08-01), Jaffe
patent: 4994566 (1991-02-01), Mimura et al.
patent: 5039586 (1991-08-01), Itami et al.
patent: 5225551 (1993-07-01), Duff et al.
Daimon Katsumi
Nukada Hidemi
Nukada Katsumi
Sakaguchi Yasuo
Tokida Akihiko
Fuji 'Xerox Co., Ltd.
Shah Mukund J.
Sripada Pavanaram K.
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