Electrophotographic member, intermediate transfer member and electrophotographic image forming apparatus

Patent metadata

Field	Value
Publication number	US-9606478-B2
Application number	US-201414295166-A
Country	US
Kind code	B2
Filing date	Jun 3, 2014
Priority date	Jun 12, 2013
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

An electrophotographic member which has resistance to discharge degradation and can maintain the toner releasability for a long period is provided. The electrophotographic member includes a substrate and a surface layer. The surface layer includes a binder resin having an acrylic skeleton and a modified silicone compound having a polyether group and a hydroxyl group in a molecule, the surface layer having a surface having a n-hexadecane contact angle of 30° or more.

First claim

What is claimed is:

1. An electrophotographic member comprising:
a substrate; and
a surface layer comprising a binder resin having an acrylic skeleton, and a modified silicone compound having a polyether group and a hydroxyl group in a molecule, wherein
the surface layer has a surface having a n-hexadecane contact angle of 30° or more, and
the surface layer has an average hardness in the range of 0.20-0.30 GPa in a depth region of 10% to 20% of the thickness from the outermost surface by nano-indentation method with a Berkovich indenter.

2. The electrophotographic member according to claim 1 , wherein
the binder resin includes a structural unit represented by chemical formula (1)

where R 1 represents a hydrogen atom or a methyl group, R 2 represents a hydrogen atom or an alkyl, and “n” represents an integer of 2 or more;
the modified silicone compound includes a structure represented by chemical formula (2):

where “m” represents an integer of 2 or more, and R 3 has a structure represented by chemical formula (3):

where “p” and “q” independently represent an integer of 2 or more, and “a” and “b” each represent an integer of 1 or more.

3. The electrophotographic member according to claim 1 , wherein the modified silicone compound has a weight average molecular weight (Mw) of 6,000 to 12,000.

4. The electrophotographic member according to claim 1 , wherein the modified silicone compound has a hydroxyl value (mg KOH/g) of 30 to 70.

5. The electrophotographic member according to claim 1 , wherein the modified silicone compound is contained in the surface layer in an amount of 5 to 60 mass % relative to the resin components in the surface layer.

6. An intermediate transfer member for use in an electrophotographic image forming apparatus that obtains an image by primary-transferring a toner image formed on a first image bearing member to an intermediate transfer member and then secondary-transferring the primary-transferred toner image on the intermediate transfer member onto a second image bearing member, wherein the intermediate transfer member is the electrophotographic member according to claim 1 .

7. An electrophotographic image forming apparatus that obtains an image by primary-transferring a toner image formed on a first image bearing member to an intermediate transfer member and then secondary-transferring the primary-transferred toner image on the intermediate transfer member onto a second image bearing member, wherein the intermediate transfer member is the electrophotographic member according to claim 1 .

Assignees

• Canon Kk

Inventors

• Tsuji Yasutomo

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

• G03G5/14791

  Macromolecular compounds characterised by their structure, e.g. block polymers, reticulated polymers, or by their chemical properties, e.g. by molecular weight or acidity · CPC title

• G03G5/14795

  Macromolecular compounds characterised by their physical properties · CPC title

• Y10T428/31504

  Composite [nonstructural laminate] · CPC title

• G03G2215/0129

  horizontal medium transport path at the secondary transfer · CPC title