Hydroxygallium phthalocyanine compound, production process there

Details Hydroxygallium phthalocyanine compound, production process there Hydroxygallium phthalocyanine compound, production process there

1999-01-08

1999-08-03

Shah, Mukund J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

430 78, 540122, C09B 4704, C07D48722, G03G 506

Patent

active

059327227

ABSTRACT:
An electrophotographic photosensitive member having a high sensitivity to long-wavelength light as emitted by a semiconductor laser and causing little change in potential change during repetitive use is formed by using as a charge-generating material a hydroxygallium phthalocyanine having a crystal form characterized by a strongest peak at a Bragg angle (2.theta..+-.0.2 deg.) of 28.1 deg. in a CuK.sub..alpha. characteristic X-ray diffraction pattern. The hydroxygallium phthalocyanine may preferably be produced through a process including treating a halogenated gallium phthalocyanine for conversion into a hydrous hydroxygallium phthalocyanine, freeze-drying the hydrous hydroxygallium phthalocyanine into a low-crystallinity hydroxygallium phthalocyanine, and milling the low-crystallinity hydroxygallium phthalocyanine.

REFERENCES:
patent: 5663327 (1997-09-01), Tambo et al.
patent: 5756247 (1998-05-01), Tambo et al.

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