Transfer member for electrophotography and electrophotographic image forming apparatus

Patent metadata

Field	Value
Publication number	US-9575439-B2
Application number	US-201514685527-A
Country	US
Kind code	B2
Filing date	Apr 13, 2015
Priority date	Apr 14, 2014
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

Provided a transfer member for electrophotography of a multilayer structure including a surface layer having a surface for carrying toner is provided.
The surface layer contains a graft type copolymer comprising a polymer having a structure represented by formula (1) as a main chain, and a group containing a structure represented by formula (2) and a group containing a structure represented by formula (3) each bonded to the main chain as a side chain. The surface of the surface layer has a matrix phase formed by a group containing a structure represented by formula (2) and a domain phase formed by a group containing a structure represented by formula (3):

First claim

What is claimed is:

1. A transfer member for electrophotography comprising a surface layer having a surface for carrying toner, the surface layer containing a graft type copolymer comprising a polymer having a structure represented by formula (1) as a main chain, and
a group containing a structure represented by formula (2) bonded to the main chain as a side chain and
a group containing a structure represented by formula (3) bonded to the main chain as a side chain; and
the surface of the surface layer has a matrix phase formed by a group containing a structure represented by formula (2), and
a domain phase formed by a group containing a structure represented by formula (3), wherein
in the copolymer the mass ratio of the group containing the structure represented by formula (2) to the main chain is 5 to 40 mass %, and the mass ratio of the group containing the structure represented by formula (3) to the main chain is 10 to 25 mass %:

wherein R 1 represents a hydrogen atom or a methyl group; R 2 represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms; and n0 represents an integer of 2 or more,

wherein R 3 , R 4 , R 5 , R 6 , R 7 , R 8 and R 9 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms; and m represents an integer of 2 or more,

wherein X represents a fluorine atom or trifluorocarbon; p and q each independently represent an integer of 0 or more; and “p+q” represents an integer of 2 or more.

2. The transfer member according to claim 1 , wherein the depth of the domain phase is 10 to 15% of the thickness of the surface layer.

3. The transfer member according to claim 1 , wherein the thickness of the surface layer is 1 to 20 μm.

4. The transfer member according to claim 1 , wherein the diameter of the domain phase is 0.8 to 1.5 μm.

5. The transfer member according to claim 1 , further comprising a base layer.

6. The transfer member according to claim 1 , having a volume resistivity of 1.0×10 8 to 1.0×10 14 Ω·cm.

7. The transfer member according to claim 1 , having a surface resistivity of 1.0×10 7 to 1.0×10 13 Ω/□.

8. An electrophotographic image forming apparatus comprising a first image bearing member, an intermediate transfer member, a device which primarily transfers a toner image formed on the first image bearing member to the intermediate transfer member and a device which secondarily transfers the toner image primarily transferred to the intermediate transfer member to a second image bearing member, wherein
the intermediate transfer member is the transfer member according to claim 1 .

Assignees

• Canon Kk

Inventors

• Tsuji Yasutomo

Classifications

• B32B27/28

  comprising synthetic resins not wholly covered by any one of the sub-groups {B32B27/30 - B32B27/42} · CPC title

• B32B33/00

  Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class · CPC title

• G03G15/162 Primary

  details of the the intermediate support, e.g. chemical composition · CPC title