Electrophotographic photosensitive member, method for manufacturing the same, electrophotographic apparatus, process cartridge, and hydroxygallium phthalocyanine crystal
AssigneeCanon Kabushiki Kaisha
InventorsTsutomu Nishida, Masato Tanaka, Masataka Kawahara
Life of this patent
Estimating the term…
Abstract
A photosensitive layer of an electrophotographic photosensitive member contains a hydroxygallium phthalocyanine crystal of a crystalline form having peaks at Bragg angles 2θ±0.2° of 7.0°, 16.6°, 20.8°, and 26.9° in X-ray diffraction with CuKα radiation.
Claims15
An electrophotographic photosensitive member comprising:
- a support;
- and
- a photosensitive layer formed on the support;
- wherein the photosensitive layer comprises:
- a hydroxygallium phthalocyanine crystal of a crystalline form having peaks at Bragg angles 2θ±0.2° of 7.0°, 16.6°, 20.8° and 26.9° in X-ray diffraction with CuKα radiation.
A method for manufacturing an electrophotographic photosensitive member having a support and a photosensitive layer formed on the support, the method comprising:
- mixing a hydroxygallium phthalocyanine crystal of a crystalline form having peaks at Bragg angles 2θ±0.2° of 6.9° and 26.6° in X-ray diffraction with CuKα radiation and hexamethylphosphoric acid triamide for crystal transformation to obtain a hydroxygallium phthalocyanine crystal of a crystalline form having peaks at Bragg angles 2θ±0.2° of 7.0°, 16.6°, 20.8°, and 26.9° in X-ray diffraction with CuKα radiation;
- mixing the hydroxygallium phthalocyanine crystal after the crystal transformation and a binder resin in a solvent to prepare a coating liquid for photosensitive layer;
- and
- forming a coat of the coating liquid for photosensitive layer, and then drying the coat to form the photosensitive layer.
A method for manufacturing an electrophotographic photosensitive member having a support, a charge generation layer formed on the support, and a charge transport layer formed on the charge generation layer, the method comprising:
- mixing a hydroxygallium phthalocyanine crystal of a crystalline form having peaks at Bragg angles 2θ±0.2° of 6.9° and 26.6° in X-ray diffraction with CuKα radiation and hexamethylphosphoric acid triamide for crystal transformation to obtain a hydroxygallium phthalocyanine crystal of a crystalline form having peaks at Bragg angles 2θ±0.2° of 7.0°, 16.6°, 20.8°, and 26.9° in X-ray diffraction with CuKα radiation;
- mixing the hydroxygallium phthalocyanine crystal after the crystal transformation and a binder resin in a solvent to prepare a coating liquid for charge generation layer;
- and then
- forming a coat of the coating liquid for charge generation layer, and then drying the coat to form the charge generation layer.
A hydroxygallium phthalocyanine crystal of a crystalline form having peaks at Bragg angles 2θ±0.2° of 7.0°, 16.6°, 20.8°, and 26.9° in X-ray diffraction with CuKα radiation.
Dependencies are inferred from the claim text.