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

Patent metadata

Field	Value
Publication number	US-10012915-B2
Application number	US-201715638891-A
Country	US
Kind code	B2
Filing date	Jun 30, 2017
Priority date	Oct 29, 2014
Publication date	Jul 3, 2018
Grant date	Jul 3, 2018

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.

First claim

What is claimed is:

1. 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,
wherein concentration of the aqueous hydrochloric acid solution is 10 mass % or more.

2. The method 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.

3. The method according to claim 1 , the method further 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).

4. The method according to claim 1 , the method further 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.

5. A method for producing an electrophotographic photosensitive member that includes, in the following order, a support and a photosensitive layer having a chlorogallium phthalocyanine crystal the method comprising:
a hydrochloric acid treatment step of obtaining the chlorogallium phthalocyanine crystal by mixing a hydroxygallium phthalocyanine crystal and an aqueous hydrochloric acid solution,
wherein concentration of the aqueous hydrochloric acid solution is 10 mass % or more.

6. A method for producing an electrophotographic photosensitive member that includes, in the following order, a support, a charge generating layer having a chlorogallium phthalocyanine crystal, and a charge transporting layer, the method comprising:
a hydrochloric acid treatment step of obtaining the chlorogallium phthalocyanine crystal by mixing a hydroxygallium phthalocyanine crystal and an aqueous hydrochloric acid solution,
wherein concentration of the aqueous hydrochloric acid solution is 10 mass % or more.

Assignees

• Canon Kk

Inventors

• Nishida Tsutomu
• Tanaka Masato
• Kawahara Masataka
• Kuno Jumpei
• Watariguchi Kaname
• Hirano Hidetoshi

Classifications

• G03G5/0696

  Phthalocyanines · CPC title

• C09B67/0026

  of phthalocyanine pigments · CPC title

• G03G5/047 Primary

  characterised by the charge-generation layers or charge transport layers {(G03G5/0433 and G03G5/0436 take precedence)} · CPC title

• C09B47/045

  Special non-pigmentary uses, e.g. catalyst, photosensitisers of phthalocyanine dyes or pigments · CPC title

• C30B29/54

  Organic compounds · CPC title