Hitachi Chemical Company, Ltd.

Hitachi Chemical Company, Co.

Mikio Itagaki

Shigeru Hayashida

Takayuki Akimoto

Megumi Matsui

Yoshii Morishita

Hiroko Ishikawa

Keiichi Endo

Susumu Kaneko

Seiji Miyaoka

Kouji Ohkoshi

Disclosed is a phthalocyanine composition which comprises having clear diffraction peaks at 17.9.degree., 24.0.degree., 26.2.degree. and 27.2.degree. of Bragg angles (2.theta..+-.0.2.degree.) in an X-ray diffraction spectrum with Cu K.alpha., a process for preparing the same, an electrophotographic photoreceptor using the same and a coating solution for forming a charge generation layer containing the same.

Phthalocyanine composition, process for preparing the same,

Phthalocyanine electrophotographic photoreceptor for charge generation

Disclosed are a phthalocyanine composition having main diffraction peaks at 7.5.degree., 22.5.degree., 24.3.degree., 25.3.degree. and 28.6.degree. of Bragg angles (2.theta..+-.0.2.degree.) in an X-ray powder diffraction spectrum with Cu K.alpha. radiation, a process for preparing the same, an electrophotographic photoreceptor using the same and a coating solution for a charge generation layer containing the same. The composition is made from a mixture of a titanylphthalocyanine and a halogenated group IIIA metal phthalocyanine which has been made amorphous by a strong mineral acid and crystallized from an organic solvent.

Phthalocyanine composition, process for preparing the same and

A charge transport layer formed from a composition comprising a mixed solvent containing alkoxybenzene and a charge transport material, or a photoconductive layer formed from a composition comprising alkoxybenzene and an organic photoconductive material are effective for producing electrophotographic members excellent in image without damaging the circumstances as well as stable in maintaining good charging characteristics and dark decay characteristics after repeated use.

Composition for forming charge transport layer and electrophotographic

Disclosed are a coating solution for forming a charge generation layer, which comprises:

Coating solution for charge generation layer and electrophotographic

Disclosed are a phthalocyanine composition which comprises having main diffraction peaks at 7.5.degree., 22.5.degree., 24.3.degree., 25.3.degree. and 28.6.degree. of Bragg angles (2.theta..+-.0.2.degree.) in an X-ray diffraction spectrum with Cu K.alpha., a process for preparing the same, an electrophotographic photoreceptor using the same and a coating solution for a charge generation layer containing the same.

Disclosed are a phthalocyanine composition which comprises having main diffraction peaks at 7.5.degree., 24.2.degree. and 27.3.degree. of Bragg angles (2.theta..+-.0.2.degree.) in an X-ray diffraction spectrum with Cu K.alpha., a process for preparing the same, an electrophotographic photoreceptor using the same and a coating solution for forming a charge generation layer containing the same.

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Ibaraki, Japan

Mikio Itagaki