Member for electrophotography, process cartridge, and electrophotographic apparatus

Patent metadata

Field	Value
Publication number	US-10067430-B2
Application number	US-201615363135-A
Country	US
Kind code	B2
Filing date	Nov 29, 2016
Priority date	Dec 4, 2015
Publication date	Sep 4, 2018
Grant date	Sep 4, 2018

Abstract

A member for electrophotography has an electro-conductive base and at least one electro-conductive resin layer, in which the electro-conductive resin layer of the outermost layer contains urethane resin and the urethane resin has a structure of a silicone graft fluororesin and a structure represented by Formula (1)

First claim

What is claimed is:

1. A member for electrophotography comprising:
an electro-conductive base; and
at least one electro-conductive resin layer, wherein
the electro-conductive resin layer of an outermost layer contains urethane resin, and
the urethane resin has a structure of a silicone graft fluororesin and a structure represented by Formula (1)

wherein, in Formula (1), A1 represents at least one structure selected from the group consisting of (A101), (A102), (A103), and (A104);
the (A101) structure containing a structure represented by Formula (A101a) shown below and a structure represented by either or both of Formula (A101b) and Formula (A101c)

the (A102) structure containing a constituent unit represented by Formula (A102a) and a constituent unit represented by either or both of Formula (A102b) and Formula (A102c)

wherein, in Formulae (A102a) to (A102c), R1 and R2 each independently represent a hydrogen atom or an alkyl group having carbon atoms of 1 or more and 4 or less;
the (A103) structure represented by Formula (A103a)

wherein, in Formula (A103a), R3 and R4 each independently represent a hydrogen atom or an alkyl group having carbon atoms of 1 or more and 4 or less and m represents an integer of 7 or more; and
the (A104) structure represented by Formula (A104a)

wherein, in Formula (A104a), R5 and R6 each independently represent a hydrogen atom or an alkyl group having carbon atoms of 1 or more and 4 or less and p represents an integer of 6 or more.

2. The member for electrophotography according to claim 1 ,
wherein the structure of the silicone graft fluororesin has structures represented by Formula (2) and Formula (3)

wherein, in Formula (2), R7 represents any one selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group having carbon atoms of 1 or more and 10 or less, and a substituted or unsubstituted aryl group having carbon atoms of 6 or more and 10 or less, and R8 and R9 each independently represent any one selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group having carbon atoms of 1 or more and 10 or less, and a substituted or unsubstituted aryl group having carbon atoms of 6 or more and 10 or less, and

wherein, in Formula (3), R10 represents any one selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group having carbon atoms of 1 or more and 10 or less, and a substituted or unsubstituted aryl group having carbon atoms of 6 or more and 10 or less, L represents a linking group, R11 to R15 each independently represent a hydrogen atom or an alkyl group having carbon atoms of 1 or more and 2 or less, R16 to R17 each independently represent any one selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group having carbon atoms of 1 or more and 10 or less, and a substituted or unsubstituted aryl group having carbon atoms of 6 or more and 10 or less, and n represents an integer of 1 or more.

3. The member for electrophotography according to claim 1 , wherein
the urethane resin is a cured product of
a hydroxyl group-containing silicone graft fluororesin,
polyol having at least one structure selected from (A101) to (A104), and
an isocyanate compound.

4. The member for electrophotography according to claim 2 , wherein the linking group L in Formula (3) is a single bond, a straight or branched-chain alkylene group having carbon atoms of 1 or more and 2 or less, or a group in which an arbitrary carbon-carbon bond in the alkylene group is substituted by an ester bond, an ether bond, an amide bond, or a combination of the ester, ether, and amide bonds.

5. The member for electrophotography according to claim 2 , wherein a molecular weight of the structure represented by Formula (3) is 15000 or more and 30000 or less.

6. The member for electrophotography according to claim 1 , wherein A1 in Formula (1) has at least one structure selected from the group consisting of (A101), (A102), and (A103).

7. The member for electrophotography according to claim 2 , wherein the urethane resin has a structure represented by Formula (6)

wherein, in Formula (6), A2 is a structure containing a constituent unit represented by Formula (2) and a constituent unit represented by Formula (3).

8. The member for electrophotography according to claim 2 , wherein the constituent unit represented by Formula (3) is contained in a branched chain branched from a main chain of a fluororesin frame of the structure of the silicone graft fluororesin.

9. A process cartridge, which is configured to be detachably attachable to a main body of an electrophotographic apparatus, the process cartridge comprising a member for electrophotography, wherein the member for electrophotography comprises:
an electro-conductive base; and
at least one electro-conductive resin layer, wherein
the electro-conductive resin layer of an outermost layer contains urethane resin, and
the urethane resin has a structure of a silicone graft fluororesin and a structure represented by Formula (1)

wherein, in Formula (1), A1 represents at least one structure selected from the group consisting of (A101), (A102), (A103), and (A104);
the (A101) structure containing a structure represented by Formula (A101a) shown below and a structure represented by either or both of Formula (A101b) and Formula (A101c)

the (A102) structure containing a constituent unit represented by Formula (A102a) and a constituent unit represented by either or both of Formula (A102b) and Formula (A102c)

wherein, in Formulae (A102a) to (A102c), R1 and R2 each independently represent a hydrogen atom or an alkyl group having carbon atoms of 1 or more and 4 or less;
the (A103) structure represented by Formula (A103a)

wherein, in Formula (A103a), R3 and R4 each independently represent a hydrogen atom or an alkyl group having carbon atoms of 1 or more and 4 or less and m represents an integer of 7 or more; and
the (A104) structure represented by Formula (A104a)

wherein, in Formula (A104a), R5 and R6 each independently represent a hydrogen atom or an alkyl group having carbon atoms of 1 or more and 4 or less and p represents an integer of 6 or more.

10. An electrophotographic apparatus comprising a member for

Assignees

• Canon Kk

Inventors

• Arimura Hideya
• Urushihara Shohei
• Yamada Masaki

Classifications

• C08G18/6295

  Polymers of silicium containing compounds having carbon-to-carbon double bonds · CPC title

• G03G15/0233 Primary

  Structure, details of the charging member, e.g. chemical composition, surface properties · CPC title

• G03G5/043 Primary

  Photoconductive layers characterised by having two or more layers or characterised by their composite structure · CPC title

• G03G21/1814

  Details of parts of process cartridge, e.g. for charging, transfer, cleaning, developing (G03G21/1835 takes precedence) · CPC title

• C08G18/6279

  containing fluorine atoms · CPC title