Process for producing hydroxygallium phthalocyanine
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United States of America Patent
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Dec 5, 1995
Issued Date -
N/A
app pub date -
Oct 14, 1994
filing date -
Aug 26, 1992
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Abstract
A halogen-containing hydroxygallium phthalocyanine crystal showing intense diffraction peaks at Bragg angles (2.theta..degree..+-.0.2.degree.) of (1) 7.7.degree., 16.5.degree., 25.1.degree. and 26.6.degree.; (2) 7.9.degree., 16.5.degree., 24.4.degree., and 27.6.degree.; (3) 7.0.degree., 7.5.degree., 10.5.degree., 11.7.degree., 12.7.degree., 17.3.degree., 18.1.degree., 24.5.degree., 26.2.degree., and 27.1.degree.; 4) 7.5.degree., 9.9.degree., 12.5.degree., 16.3.degree., 18.6.degree., 25.1.degree., and 28.3.degree.; or (5) 6.8.degree., 12.8.degree., 15.8.degree., and 26.0.degree. and an electrophotographic photoreceptor containing the halogen-containing hydroxygallium phthalocyanine crystal as a charge generating material are disclosed. Hydroxygallium phthalocyanine crystals are produced by reacting a gallium trihalide with phthalonitrile or diiminoisoindoline in a halogenated aromatic hydrocarbon solvent, treating the resulting halogenated gallium phthalocyanine with an amide solvent, and hydrolyzing the halogenated gallium phthalocyanine. The photoreceptor exhibits stabilized electrophotographic characteristics.
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