ELECTROPHOTOGRAPHIC MEMBER, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS

• US 20130266338A1
• Filed: 06/04/2013
• Published: 10/10/2013
• Est. Priority Date: 12/14/2011
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Taniguchi, Tomohito, Mayuzumi, Hiroshi, Yagisawa, Yusuke
• Granted Patent: US 8,971,766 B2
• Time in Patent Office: Days
• US Class Current: 399/111
• CPC Class Codes: F16C 2208/10 Elastomers; Rubbers
• CPC Class Codes: G03G 15/0233 Structure, details of the charging member, e.g. chemical composition, surface properties
• CPC Class Codes: G03G 21/18 using a processing cartridge , whereby the process cartridge comprises at least two image processing means in a single unit

Abstract

The present invention provides an electrophotographic member capable of more definitely suppressing occurrence of a C set image. The electrophotographic member has a surface layer including a modified polysiloxane having a structure represented by the following formula (1). In the formula (1), G represents a bivalent group having an ethylene oxide chain represented by (—O—C₂H₄—) and L represents polysiloxane having at least a SiO_4/2(Q) unit or a SiO_3/2(T) unit.

Claims

1. An electrophotographic member comprising a surface layer, wherein

the surface layer comprises a modified polysiloxane having a structure represented by the following formula (1)

2. The electrophotographic member according to claim 1,

wherein R1 of the formula (1) is a group represented by the formula (2), and

in the formula (2), j is 0 or 1, k is 1 and the bivalent connecting group represented by R3 has a structure represented by the following formula (6):

3. The electrophotographic member according to claim 1, wherein

R1 of the formula (1) is a group represented by the formula (2), and

in the formula (2), j is 1 and k is 0.

4. The electrophotographic member according to claim 1, wherein

R1 of the formula (1) is a group represented by the formula (3), and

in the formula (3), p is 1, q is 1 and R₆ has a structure represented by the following formula (7):

5. The electrophotographic member according to claim 1, wherein

R2 of the formula (1) has a structure represented by the formula (4), and

in the formula (4), R9 has a structure represented by the following formula (8) or (9):

6. The electrophotographic member according to claim 1, wherein

R2 of the formula (1) has a structure represented by the formula (5), and

in the formula (5), R13 has a structure represented by the following formula (11) or (12):

7. The electrophotographic member according to claim 6, wherein R11 of the formula (5) is an alkylene group having 1 to 10 carbon atoms.

8. A process cartridge comprising a charging member and an electrophotographic photosensitive member disposed to be chargeable by the charging member, and having a structure removable from a main body of an electrophotographic apparatus, wherein the charging member is an electrophotographic member according to claim 1.

9. An electrophotographic apparatus comprising a charging member and an electrophotographic photosensitive member disposed to be chargeable by the charging member, wherein the charging member is an electrophotographic member according to claim 1.