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AssigneeMitsubishi Chemical Corporation
InventorsMitsuo WADA, Kazutaka IDA, Teruyuki MITSUMORI, Hiroaki TAKAMURA, Tadashi MIZUSHIMA
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Provided is an excellent phthalocyanine crystal having high sensitivity and little fluctuation in sensitivity for a humidity change in a use environment and applicable to the martial for solar battery, electronic paper, electrophotographic photoreceptor, etc. Namely, phthalocyanine crystal obtained by bringing a phthalocyanine crystal precursor into contact with an aromatic aldehyde compound to convert the crystal form. Also, provided is an electrophotographic photoreceptor that not only exhibits high sensitivity but also has little fluctuation in sensitivity for a humidity change in a use environment. Further, provided is an electrophotographic photoreceptor cartridge and an image-forming device, both of which can produce a stable quality images for a humidity change in a use environment by using the electrophotographic photoreceptor.
A phthalocyanine crystal, which is obtained through a step of bringing a phthalocyanine crystal precursor into contact with an aromatic aldehyde compound to convert the crystal form.
A phthalocyanine crystal, which is obtained by bringing a phthalocyanine crystal precursor into contact with an organic compound having no functional group showing acidity in the presence of at least one compound selected from the group consisting of organic acids, organic acid anhydrides, and organic acid esters having a heteroatom to convert the crystal form.
A phthalocyanine crystal, which is obtained through a step of bringing a phthalocyanine crystal precursor into contact with an organic compound which is in a liquid state under conditions of 1013 hPa and 25° C. and does not have a functional group showing acidity, in the presence of an aromatic compound which is solid under conditions of 1013 hPa and 25° C. and has an electron-withdrawing substituent, to convert the crystal form.
A phthalocyanine crystal, which is obtained through a step of bringing a phthalocyanine crystal precursor into contact with an aromatic compound having an oxygen atom-containing group and a halogen atom having an atomic weight of 30 or more to convert the crystal form.
10-19. (canceled)
Dependencies are inferred from the claim text.