Patent US5407766A successfully refreshed from Google Patents.
US5407766A
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Hydroxygallium phthalocyanine photoconductive imaging members
Assignee: Xerox Corp
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Filing: 1993-12-20
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Granted: 1995-04-18
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Expires: 2013-12-20
Abstract
Abstract A process for the preparation of hydroxygallium phthalocyanine and elements containing same which comprises the synthesis of a precursor halogallium phthalocyanine by the reaction of a diiminoisoindolene with gallium acetylacetonate; hydrolysis thereof to hydroxygallium phthalocyanine; and conversion of the resulting hydroxygallium phthalocyanine obtained to Type V hydroxygallium phthalocyanine by contacting said resulting hydroxygallium phthalocyanine with an organic solvent.
Inventors
- 👤 James D. Mayo
- 👤 James M. Duff
- 👤 Cheng K. Hsiao
- 👤 Sandra J. Gardner
- 👤 Barkev Keoshkerian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:54
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0696; C; C09; C09B; C09B47/00; C09B47/04; C09B47/06; C09B47/073; C09B67/00; C09B67/0001; C09B67/0014; C09B67/0016; C09B67/0025; C09B67/0026
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
111 words
A layered photoconductive imaging member comprised of a supporting substrate, a photogenerating layer, and a charge transport layer; and wherein the photogenerating layer is comprised of Type V hydroxygallium phthalocyanine obtained by preparing a precursor gallium phthalocyanine by the reaction of 1,3-diiminoisoindolene with gallium acetylacetonate in a solvent of quinoline or n-methylpyrrolidone; filtering and thereafter washing said pigment precursor gallium phthalocyanine with hot N,N-dimethylformamide; followed by washing with an organic solvent; hydrolyzing said precursor by dissolving in a strong acid; and then reprecipitating the resulting dissolved pigment in aqueous ammonia, thereby forming Type I hydroxygallium phthalocyanine; and admixing said Type I with an organic solvent of N,N-dimethylformamide, n-methylpyrrolidone, pyridine, or dimethylsulfoxide.
Claim 2
Dependent Claim
111 words
A layered photoconductive imaging member comprised of a supporting substrate, a photogenerating layer, and a charge transport layer; and wherein the photogenerating layer is comprised of Type V hydroxygallium phthalocyanine obtained by preparing a precursor gallium phthalocyanine by the reaction of 1,3-diiminoisoindolene with gallium acetylacetonate in a solvent of quinoline or n-methylpyrrolidone; filtering and thereafter washing said pigment precursor gallium phthalocyanine with hot N,N-dimethylformamide; followed by washing with an organic solvent; hydrolyzing said precursor by dissolving in a strong acid; and then reprecipitating the resulting dissolved pigment in aqueous ammonia, thereby forming Type I hydroxygallium phthalocyanine; and admixing said Type I with an organic solvent of N,N-dimethylformamide, n-methylpyrrolidone, pyridine, or dimethylsulfoxide.
Claim 3
Dependent Claim
127 words
A layered photoconductive imaging member comprised of a supporting substrate, a photogenerating layer, and a charge transport layer; and wherein the photogenerating layer is comprised of Type V hydroxygallium phthalocyanine obtained by the formation of a precursor gallium phthalocyanine prepared by heating one part of gallium acetylacetonate with from about 1 part to about 10 parts of 1,3-diiminoisoindolene in a solvent quinoline or n-methylpyrrolidone present in an amount of from about 10 parts to about 100 parts per part of gallium acetylacetonate that is present; hydrolyzing said precursor by dissolving in a strong acid; and then reprecipitating the dissolved pigment in aqueous ammonia, thereby forming Type I hydroxygallium phthalocyanine; and admixing said Type I hydroxygallium phthalocyanine with an organic solvent of N,N-dimethylformamide, n-methylpyrrolidone, pyridine, or dimethyl sulfoxide.
Claim 4
Dependent Claim
127 words
A layered photoconductive imaging member comprised of a supporting substrate, a photogenerating layer, and a charge transport layer; and wherein the photogenerating layer is comprised of Type V hydroxygallium phthalocyanine obtained by the formation of a precursor gallium phthalocyanine prepared by heating one part of gallium acetylacetonate with from about 1 part to about 10 parts of 1,3-diiminoisoindolene in a solvent quinoline or n-methylpyrrolidone present in an amount of from about 10 parts to about 100 parts per part of gallium acetylacetonate that is present; hydrolyzing said precursor by dissolving in a strong acid; and then reprecipitating the dissolved pigment in aqueous ammonia, thereby forming Type I hydroxygallium phthalocyanine; and admixing said Type I hydroxygallium phthalocyanine with an organic solvent of N,N-dimethylformamide, n-methylpyrrolidone, pyridine, or dimethyl sulfoxide.
Claim 5
Dependent Claim
29 words
A photoconductive image in accordance with claim 2 wherein the hydroxy gallium type V obtained is free of residual chlorine thereby enabling an imaging member with excellent electrical characteristics.
Claim 6
Dependent Claim
30 words
An imaging member in accordance with claim 2 wherein the hydroxy gallium Type V obtained is of a small particle size of from about 0.01 micron to about 0.5 micron.
Claim 7
Dependent Claim
20 words
An imaging member in accordance with claim 1 wherein the Type V hydroxy gallium phthalocyanine is free of residual chlorine.
Claim 8
Dependent Claim
19 words
A process in accordance with claim 2 wherein the solvent is quinoline and the organic solvent is dimethyl formamide.
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