Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus, and chlorogallium phthalocyanine crystal and method for producing the same

Abstract

An electrophotographic photosensitive member includes a support and a photosensitive layer in this order. The photosensitive layer contains a chlorogallium phthalocyanine crystal obtained by mixing a hydroxygallium phthalocyanine crystal and an aqueous hydrochloric acid solution.

What is claimed is: 
     
         1 . An electrophotographic photosensitive member comprising:
 a support; and   a photosensitive layer in this order,   wherein the photosensitive layer comprises a chlorogallium phthalocyanine crystal obtained by mixing a hydroxygallium phthalocyanine crystal and an aqueous hydrochloric acid solution.   
     
     
         2 . An electrophotographic photosensitive member comprising:
 a support;   a charge generating layer; and   a charge transporting layer in this order,   wherein the charge generating layer comprises a chlorogallium phthalocyanine crystal obtained by mixing a hydroxygallium phthalocyanine crystal and an aqueous hydrochloric acid solution.   
     
     
         3 . The electrophotographic photosensitive member according to  claim 1 , wherein the chlorogallium phthalocyanine crystal is a crystal having peaks at Bragg angles 2θ of 7.1°±0.2°, 16.5°±0.2°, 25.8°±0.2°, 27.2°±0.4°, and 28.2°±0.2° in a CuKα X-ray diffraction pattern. 
     
     
         4 . The electrophotographic photosensitive member according to  claim 1 , wherein the chlorogallium phthalocyanine crystal comprises an organic compound therein. 
     
     
         5 . The electrophotographic photosensitive member according to  claim 1 , wherein the hydroxygallium phthalocyanine crystal is obtained through a step of performing an acid pasting treatment on a chlorogallium phthalocyanine crystal (a raw material). 
     
     
         6 . A process cartridge detachably attachable to a main body of an electrophotographic apparatus, the process cartridge integrally supporting an electrophotographic photosensitive member and at least one selected from the group consisting of a charging device, a developing device, a transfer device, and a cleaning member,
 wherein the electrophotographic photosensitive member comprises a support and a photosensitive layer in this order, and   the photosensitive layer comprises a chlorogallium phthalocyanine crystal obtained by mixing a hydroxygallium phthalocyanine crystal and an aqueous hydrochloric acid solution.   
     
     
         7 . An electrophotographic apparatus comprising:
 an electrophotographic photosensitive member;   a charging device;   an exposure device;   a developing device; and   a transfer device,   wherein the electrophotographic photosensitive member comprises a support and a photosensitive layer in this order, and   the photosensitive layer comprises a chlorogallium phthalocyanine crystal obtained by mixing a hydroxygallium phthalocyanine crystal and an aqueous hydrochloric acid solution.   
     
     
         8 . A chlorogallium phthalocyanine crystal obtained by mixing a hydroxygallium phthalocyanine crystal and an aqueous hydrochloric acid solution. 
     
     
         9 . The chlorogallium phthalocyanine crystal according to  claim 8 , wherein the hydroxygallium phthalocyanine crystal is obtained through a step of performing an acid pasting treatment on a chlorogallium phthalocyanine crystal (a raw material). 
     
     
         10 . The chlorogallium phthalocyanine crystal according to  claim 8 , wherein the chlorogallium phthalocyanine crystal has peaks at Bragg angles 2θ of 7.1°±0.2°, 16.5°±0.2°, 25.8°±0.2°, 27.2°±0.4°, and 28.2°±0.2° in a CuKα X-ray diffraction pattern. 
     
     
         11 . The chlorogallium phthalocyanine crystal according to  claim 8 , comprising an organic compound therein. 
     
     
         12 . A method for producing a chlorogallium phthalocyanine crystal, the method comprising:
 a hydrochloric acid treatment step of obtaining a chlorogallium phthalocyanine crystal by mixing a hydroxygallium phthalocyanine crystal and an aqueous hydrochloric acid solution.   
     
     
         13 . The method for producing a chlorogallium phthalocyanine crystal according to  claim 12 , wherein the chlorogallium phthalocyanine crystal has peaks at Bragg angles 2θ of 7.1°±0.2°, 16.5°±0.2°, 25.8°±0.2°, 27.2°±0.4°, and 28.2°±0.2° in a CuKα X-ray diffraction pattern. 
     
     
         14 . The method for producing a chlorogallium phthalocyanine crystal according to  claim 12 , the method comprising, before the hydrochloric acid treatment step, a step of obtaining the hydroxygallium phthalocyanine crystal by performing an acid pasting treatment on a chlorogallium phthalocyanine crystal (a raw material). 
     
     
         15 . The method for producing a chlorogallium phthalocyanine crystal according to  claim 12 , the method comprising, after the hydrochloric acid treatment step, a step of mixing the chlorogallium phthalocyanine crystal and an organic compound and performing a wet milling treatment to obtain a chlorogallium phthalocyanine crystal in which the organic compound is comprised.