Electrophotographic photosensitive member and manufacturing method therefor, process cartridge and electrophotographic apparatus including the electrophotographic photosensitive member, and phthalocyanine crystal and method producing therefor

Patent metadata

Field	Value
Publication number	US-9436106-B2
Application number	US-201514689364-A
Country	US
Kind code	B2
Filing date	Apr 17, 2015
Priority date	Apr 30, 2014
Publication date	Sep 6, 2016
Grant date	Sep 6, 2016

Abstract

Provided is an electrophotographic photosensitive member, including a photosensitive layer that includes a phthalocyanine crystal in which a compound represented by the following formula (1) is contained:

in the formula (1), X represents a vinyl group or a propyl group.

First claim

What is claimed is:

1. An electrophotographic photosensitive member, comprising:
a support; and
a photosensitive layer formed on the support,
wherein the photosensitive layer includes a phthalocyanine crystal in which a compound represented by the following formula (1) is contained:

in the formula (1), X represents a vinyl group or a propyl group.

2. An electrophotographic photosensitive member according to claim 1 , wherein the phthalocyanine crystal is a gallium phthalocyanine crystal.

3. An electrophotographic photosensitive member according to claim 2 , wherein the gallium phthalocyanine crystal is a hydroxygallium phthalocyanine crystal.

4. An electrophotographic photosensitive member according to claim 3 , wherein the hydroxygallium phthalocyanine crystal is a hydroxygallium phthalocyanine crystal having peaks at Bragg angles 2θ±0.2° of 7.4° and 28.3° in CuKα characteristic X-ray diffraction.

5. An electrophotographic photosensitive member according to claim 1 , wherein a content of the compound represented by the formula (1) is 0.01 mass % or more and 20 mass % or less with respect to the phthalocyanine crystal.

6. An electrophotographic photosensitive member according to claim 1 , wherein a content of the compound represented by the formula (1) is 0.1 mass % or more and 1.9 mass % or less with respect to the phthalocyanine crystal.

7. A process cartridge, comprising:
the electrophotographic photosensitive member according to claim 1 ; and
at least one unit selected from the group consisting of
a charging unit,
a developing unit, and
a cleaning unit,

the electrophotographic photosensitive member and the at least one unit being integrally supported,
wherein the process cartridge is removably mounted onto a main body of an electrophotographic apparatus.

8. An electrophotographic apparatus, comprising:
the electrophotographic photosensitive member according to claim 1 ;
a charging unit;
an exposing unit;
a developing unit; and
a transferring unit.

9. A phthalocyanine crystal in which a compound represented by the following formula (1) is contained:

in the formula (1), X represents a vinyl group or a propyl group.

10. A method for producing the phthalocyanine crystal according to claim 9 ,
the method comprising a step of:
performing crystal transformation of a phthalocyanine by addition the compound represented by the formula (1) thereto with milling treatment.

11. A method for producing the phthalocyanine crystal according to claim 10 ,
wherein the method further comprises a step of obtaining the phthalocyanine by an acid pasting method before the performing crystal transformation of the phthalocyanine.

12. A method for manufacturing an electrophotographic photosensitive member, the electrophotographic photosensitive member including a support and a photosensitive layer formed on the support,
the method comprising the steps of:
producing the phthalocyanine crystal by the method for producing the phthalocyanine crystal according to claim 10 ; and
forming a coating of an application liquid for a photosensitive layer containing the phthalocyanine crystal, followed by drying the coating to form the photosensitive layer.

13. A method for manufacturing an electrophotographic photosensitive member, the electrophotographic photosensitive member including a support and a charge generating layer formed on the support,
the method comprising the steps of:
producing the phthalocyanine crystal by the method for producing the phthalocyanine crystal according to claim 10 ; and
forming a coating of an application liquid for a charge generating layer containing the phthalocyanine crystal, followed by drying the coating to form the charge generating layer.

Assignees

• Canon Kk

Inventors

• Kuno Junpei
• Nishida Tsutomu
• Tanaka Masato
• Kawahara Masataka
• Watariguchi Kaname

Classifications

• G03G5/00

  Recording-members for original recording by exposure, e.g. to light, to heat or to electrons; Manufacture thereof; Selection of materials therefor · CPC title

• G03G5/0651 Primary

  containing four relevant rings · CPC title

• C09B47/085

  substituting the central metal atom · CPC title

• G03G15/00

  Apparatus for electrographic processes using a charge pattern (G03G16/00, G03G17/00 take precedence) · CPC title

• G03G21/18

  using a processing cartridge {, whereby the process cartridge comprises at least two image processing means in a single unit} · CPC title