Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Process of making radiation-sensitive composition
Patent
1994-10-31
1996-01-09
Martin, Roland
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Process of making radiation-sensitive composition
430133, 430 58, 540141, G03G 506, G03G 5047
Patent
active
054828112
ABSTRACT:
A process for the preparation of hydroxygallium phthalocyanines which comprises hydrolyzing a gallium phthalocyanine precursor pigment by dissolving said hydroxygallium phthalocyanine in a strong acid and then reprecipitating the resulting dissolved pigment in basic aqueous media; removing any ionic species formed by washing with water, concentrating the resulting aqueous slurry comprised of water and hydroxygallium phthalocyanine to a wet cake; removing water from said slurry by azeotropic distillation with an organic solvent, and subjecting said resulting pigment slurry to mixing with the addition of a second solvent to cause the formation of said hydroxygallium phthalocyanine polymorphs.
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patent: 5189155 (1993-02-01), Mayo et al.
patent: 5189156 (1993-02-01), Mayo et al.
patent: 5407766 (1995-04-01), Mayo et al.
patent: 5418107 (1995-05-01), Nealey et al.
Bull. Soc. Chim. Fr., 23 (1962), "No. 2 Study of Some Phalocyanine Derivatives, Discussion on the Various Routes of Preparation, I-Phthalocyanines With Elements of Valence Greater Than Two", Mrs. Denise Colaitis.
Gardner Sandra J.
Hsiao Cheng-Kuo
Keoshkerian Barkev
Liebermann George
Mayo James D.
Martin Roland
Palazzo E. D.
Xerox Corporation
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