Hydroxygallium phthalocyanine processes
AssigneeXerox Corporation
InventorsCheng-Kuo Hsiao, Ah-Mee Hor, Sandra J. Gardner, Roger E. Gaynor, Jacques Poitras
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Abstract
A process for the preparation of hydroxygallium phthalocyanines Type A, Type B, Type C, or Type D, which comprises contacting Type V hydroxygallium phthalocyanine with an alcohol.
Claims22
A process for the preparation of hydroxygallium phthalocyanines Type A, Type B, Type C, or Type D, which comprises contacting Type V hydroxygallium phthalocyanine with an alcohol.
A process for the preparation of hydroxygallium phthalocyanine Type A, Type B, Type C, or Type D, which comprises mixing Type V hydroxygallium phthalocyanine with an aliphatic alcohol and wherein the Type V selected is prepared by the reaction of a gallium trichloride (GaCl.sub.3) sodium methoxide solution, and o-phthalodinitrile in a solvent to obtain the precursor alkoxy-bridged gallium phthalocyanine dimer;
- hydrolyzing the precursor by dissolving it in a strong acid and then reprecipitating the dissolved pigment in aqueous ammonia, thereby forming Type I hydroxygallium phthalocyanine;
- and ballmilling the hydroxygallium phthalocyanine Type I to provide Type V hydroxygallium phthalocyanine.
Dependencies are inferred from the claim text.