Mitsubishi Petrochemical Company Limited

Junko Gouda

Akira Itsubo

Yoshinori Tokura

Hideo Toda

Shinichi Suzuki

Toshiaki Ishibashi

Toyoshi Ohashi

Toshiyuki Koyama

Tomoko Sasaki

Katsutosi Iijima

Masatomi Ozawa

A photoconductive phthalocyanine composition is disclosed, comprising (A) a photoconductive phthalocyanine composition comprising 100 parts by weight of an unsubstituted phthalocyanine derivative and from 0.001 to 5 parts by weight of a nitro- or halogen-substituted phthalocyanine derivative and (B) from 0.01 to 10 parts by weight, per 100 parts by weight of the photoconductive phthalocyanine composition (A), of a phthalocyanine derivative having at least 4 electron attracting groups. A photosensitive layer formed of the photoconductive phthalocyanine composition produces digital signals whether input light is digital or not. It is useful as not only a photoreceptor for digital recording system of electrophotography but a photoreceptor for analogue light input in conventional PPC to provide a high quality image with sharp edges.

Photoconductive phthalocyanine composition

A photoconductive material comprising a mixed crystal of at least two phthalocyanine compounds whose central substances are different from each other, the phthalocyanine compounds being represented by formula (I): ##STR1## wherein A represents a substance capable of bonding to the phthalocyanine ligand through a covalent bond or a coordinate bond. The photoconductive material exhibits stability to heat and light and sufficient sensitivity in the visible to near infrared region.

Photoconductive mixed crystals of phthalocyanine compounds and process

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Ibaraki, Japan

Junko Gouda