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US5663327A
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Hydroxygallium phthalocyanine crystal, process for producing the same, and electrophotographic photoreceptor containing the same
Assignee: Fujifilm Business Innovation Corp
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Filing: 1995-09-29
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Granted: 1997-09-02
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Expires: 2015-09-29
Abstract
Abstract Hydroxygallium phthalocyanine crystals having intense diffraction peaks at Bragg angles (2θ±0.2°) of 7.5°, 9.9°, 12.5°, 16.3°, 18.6°, 25.1° and 28.3° in CuKα characteristic X-ray diffractometry, a process for producing the same, and an electrophotographic photoreceptor containing the same are disclosed. The hydroxygallium phthalocyanine crystals are obtained by once preparing impurity-free hydroxygallium phthalocyanine having intense X-ray diffraction peaks at specific Bragg angles, followed by a solvent treatment for crystal transformation, in which the impurity-free crystals are prepared by using excess phthalocyanine ring-forming compound in the synthesis of starting gallium phthalocyanine or by removing insoluble matter from the acid paste of starting gallium phthalocyanine.
Inventors
- 👤 Fumiaki Tambo
- 👤 Katsumi Daimon
- 👤 Yasuo Sakaguchi
- 👤 Kazuo Yamasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:55
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/28; C; C09; C09B; C09B67/00; C09B67/0001; C09B67/0014; C09B67/0016; C09B67/0025; C09B67/0026; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0696
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
125 words
A process for producing a hydroxygallium phthalocyanine crystal, which comprises reacting a gallium compound with a compound for forming a phthalocyanine ring in a ratio of greater than 1:1 equivalent of the compound for forming the phthalocyanine ring to the gallium compound to prepare gallium phthalocyanine, subjecting the resulting gallium phthalocyanine to acid pasting to obtain a hydroxygallium phthalocyanine crystal having intense diffraction peaks at Bragg angles (2θ±0.2°) of 6.9°, 13.2° to 14.2°, 16.5° and 26.4° or of 7.0°, 13.4°, 16.6°, 26.0° and 26.7° in CuKα characteristic X-ray diffractometry, and transforming the resulting crystal by a solvent treatment into a hydroxygallium phthalocyanine crystal having intense diffraction peaks at Bragg angles (2θ±0.2°) of 7.5°, 9.9°, 12.5°, 16.3°, 18.6°, 25.1° and 28.3° in CuKα characteristics X-ray diffractometry.
Claim 2
Dependent Claim
125 words
A process for producing a hydroxygallium phthalocyanine crystal, which comprises reacting a gallium compound with a compound for forming a phthalocyanine ring in a ratio of greater than 1:1 equivalent of the compound for forming the phthalocyanine ring to the gallium compound to prepare gallium phthalocyanine, subjecting the resulting gallium phthalocyanine to acid pasting to obtain a hydroxygallium phthalocyanine crystal having intense diffraction peaks at Bragg angles (2θ±0.2°) of 6.9°, 13.2° to 14.2°, 16.5° and 26.4° or of 7.0°, 13.4°, 16.6°, 26.0° and 26.7° in CuKα characteristic X-ray diffractometry, and transforming the resulting crystal by a solvent treatment into a hydroxygallium phthalocyanine crystal having intense diffraction peaks at Bragg angles (2θ±0.2°) of 7.5°, 9.9°, 12.5°, 16.3°, 18.6°, 25.1° and 28.3° in CuKα characteristics X-ray diffractometry.
Claim 3
Dependent Claim
97 words
A process for producing a hydroxygallium phthalocyanine crystal, which comprises removing an insoluble matter from an acid paste of gallium phthalocyanine in an acid pasting process to prepare a hydroxygallium phthalocyanine crystal having intense diffraction peaks at Bragg angles (2θ±0.2°) of 6.9°, 13.2° to 14.2°, 16.5° and 26.4° or of 7.0°, 13.4°, 16.6°, 26.0° and 26.7° in CuKα characteristic X-ray diffractometry, and transforming the resulting crystal by a solvent treatment into a hydroxygallium phthalocyanine crystal having intense diffraction peaks at Bragg angles (2θ±0.2°) of 7.5°, 9.9°, 12.5°, 16.3°, 18.6°, 25.1° and 28.3° in CuKα characteristic X-ray diffractometry.
Claim 4
Dependent Claim
97 words
A process for producing a hydroxygallium phthalocyanine crystal, which comprises removing an insoluble matter from an acid paste of gallium phthalocyanine in an acid pasting process to prepare a hydroxygallium phthalocyanine crystal having intense diffraction peaks at Bragg angles (2θ±0.2°) of 6.9°, 13.2° to 14.2°, 16.5° and 26.4° or of 7.0°, 13.4°, 16.6°, 26.0° and 26.7° in CuKα characteristic X-ray diffractometry, and transforming the resulting crystal by a solvent treatment into a hydroxygallium phthalocyanine crystal having intense diffraction peaks at Bragg angles (2θ±0.2°) of 7.5°, 9.9°, 12.5°, 16.3°, 18.6°, 25.1° and 28.3° in CuKα characteristic X-ray diffractometry.
Claim 5
Dependent Claim
121 words
A hydroxygallium phthalocyanine crystal having intense diffraction peaks at Bragg angles (2θ±0.2°) of 7.5°, 9.9°, 12.5°, 16.3°, 18.6°, 25.1° and 28.3° in CuKα characteristic X-ray diffractometry, which are obtained by a process comprising reacting a gallium compound with a compound for forming a phthalocyanine ring in a ratio of greater than 1:1 equivalent of the compound for forming the phthalocyanine ring to the gallium compound to prepare gallium phthalocyanine, subjecting the resulting gallium phthalocyanine to acid pasting to obtain a hydroxygallium phthalocyanine crystal having intense diffraction peaks at Bragg angles (2θ±0.2°) of 6.9°, 13.2° to 14.2°, 16.5° and 26.4° or of 7.0°, 13.4°, 16.6°, 26.0° and 26.7° in CuKα characteristic X-ray diffractometry, and transforming the resulting crystal by a solvent treatment.
Claim 6
Dependent Claim
121 words
A hydroxygallium phthalocyanine crystal having intense diffraction peaks at Bragg angles (2θ±0.2°) of 7.5°, 9.9°, 12.5°, 16.3°, 18.6°, 25.1° and 28.3° in CuKα characteristic X-ray diffractometry, which are obtained by a process comprising reacting a gallium compound with a compound for forming a phthalocyanine ring in a ratio of greater than 1:1 equivalent of the compound for forming the phthalocyanine ring to the gallium compound to prepare gallium phthalocyanine, subjecting the resulting gallium phthalocyanine to acid pasting to obtain a hydroxygallium phthalocyanine crystal having intense diffraction peaks at Bragg angles (2θ±0.2°) of 6.9°, 13.2° to 14.2°, 16.5° and 26.4° or of 7.0°, 13.4°, 16.6°, 26.0° and 26.7° in CuKα characteristic X-ray diffractometry, and transforming the resulting crystal by a solvent treatment.
Claim 7
Dependent Claim
93 words
A hydroxygallium phthalocyanine crystal having intense diffraction peaks at Bragg angles (2θ±0.2°) of 7.5°, 9.9°, 12.5°, 16.3°, 18.6°, 25.1° and 28.3° in CuKα characteristic X-ray diffractometry, which are obtained by a process comprising removing an insoluble matter from an acid paste of gallium phthalocyanine in an acid pasting process to prepare a hydroxygallium phthatocyanine crystal having intense diffraction peaks at Bragg angles (2θ±0.2°) of 6.9°, 13.2° to 14.2°, 16.5° and 26.4° or of 7.0°, 13.4°, 16.6°, 26.0° and 26.7° in CuKα characteristic X-ray diffractometry, and transforming the resulting crystal by a solvent treatment.
Claim 8
Dependent Claim
93 words
A hydroxygallium phthalocyanine crystal having intense diffraction peaks at Bragg angles (2θ±0.2°) of 7.5°, 9.9°, 12.5°, 16.3°, 18.6°, 25.1° and 28.3° in CuKα characteristic X-ray diffractometry, which are obtained by a process comprising removing an insoluble matter from an acid paste of gallium phthalocyanine in an acid pasting process to prepare a hydroxygallium phthatocyanine crystal having intense diffraction peaks at Bragg angles (2θ±0.2°) of 6.9°, 13.2° to 14.2°, 16.5° and 26.4° or of 7.0°, 13.4°, 16.6°, 26.0° and 26.7° in CuKα characteristic X-ray diffractometry, and transforming the resulting crystal by a solvent treatment.
References Cited (Backward Citations)
US2770629A
Cited
US3160635A
Cited
US3357989A
Cited
US3708292A
Cited
US5463044A
Cited
US5508395A
Cited
US5482811A
Cited
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