Electrophotographic member, process cartridge and electrophotographic image forming apparatus

Patent metadata

Field	Value
Publication number	US-2020041920-A1
Application number	US-201916516763-A
Country	US
Kind code	A1
Filing date	Jul 19, 2019
Priority date	Jul 31, 2018
Publication date	Feb 6, 2020
Grant date	—

Abstract

Provided an electrophotographic member having an excellent electroconductivity and being capable of forming a high quality electrophotographic image even in long-term use. The electrophotographic member comprises an electroconductive substrate and an electroconductive layer on the substrate, the electroconductive layer containing a matrix polymer, and a specific imidazolium salt.

First claim

1 . An electrophotographic member, comprising:
an electroconductive substrate; and an electroconductive layer on the substrate, the electroconductive layer comprising a matrix polymer, and an imidazolium salt represented by Formula (1) or Formula (2)

where R11, R13 and R14 independently represent a hydrogen atom or a saturated hydrocarbon group having 1 to 4 carbon atoms, R12 and R15 independently represent a saturated hydrocarbon group having 8 to 20 carbon atoms, and X1 − represents an anion, provided that at least one of R12 and R15 represents a saturated hydrocarbon group having 9 to 20 carbon atoms;

where R21, R22 and R25 independently represent a hydrogen atom or a saturated hydrocarbon group having 1 to 4 carbon atoms, R23 and R24 independently represent a saturated hydrocarbon group having 8 to 20 carbon atoms, and X2 − represents an anion, provided that at least one of R23 and R24 represents a saturated hydrocarbon group having 9 to 20 carbon atoms.

2 . The electrophotographic member according to claim 1 , wherein a difference between the number of carbon atoms of the saturated hydrocarbon group represented by R12 and the number of carbon atoms of the saturated hydrocarbon group represented by R15 is 0 to 2.

3 . The electrophotographic member according to claim 1 , wherein the saturated hydrocarbon group represented by R12 and the saturated hydrocarbon group represented by R15 have a structure represented by Formula (3):
—(CH 2 ) m CH 3   (3)
where m represents an integer of 8 to 19.

4 . The electrophotographic member according to claim 1 , wherein the saturated hydrocarbon group represented by R12 and the saturated hydrocarbon group represented by R15 are the same.

5 . The electrophotographic member according to claim 1 , wherein a difference between the number of carbon atoms of the saturated hydrocarbon group represented by R23 and the number of carbon atoms of the saturated hydrocarbon group represented by R24 is 0 to 2.

6 . The electrophotographic member according to claim 1 , wherein the saturated hydrocarbon group represented by R23 and the saturated hydrocarbon group represented by R24 have a structure represented by Formula (4):
—(CH 2 ) n CH 3   (4)
where n represents an integer of 8 to 19.

7 . The electrophotographic member according to claim 1 , wherein the saturated hydrocarbon group represented by R23 and the saturated hydrocarbon group represented by R24 are the same.

8 . The electrophotographic member according to claim 1 , wherein the matrix polymer comprises at least one resin selected from the group consisting of a polyamide resin, a polyurethane resin, a polyester resin and an acrylic resin.

9 . The electrophotographic member according to claim 1 , wherein the anion is at least one member selected from the group consisting of a fluoroalkylsulfonylimide anion, a fluorosulfonylimide anion, a fluoroalkyl sulfonate anion, a fluoroalkyl carboxylate anion, a fluoroborate anion, a dicyanamide anion, a bisoxalatoborate anion, a thiocyanate anion, a fluorophosphate anion and a fluoroalkyl methide anion.

10 . The electrophotographic member according to claim 1 , wherein the anion is at least one member selected from the group consisting of bis(trifluoromethanesulfonyl)imide anion, a bis(pentafluoroethanesulfonyl)imide anion, a bis(heptafluoropropanesulfonyl)imide anion, a bis(nonafluorobutanesulfonyl)imide anion, a bis(dodecafluoropentanesulfonyl)imide anion, a bis(perfluorohexanesulfonylimide) anion, an N,N-hexafluoropropane-1,3-disulfonylimide anion, a bis(fluorosulfonyl)imide anion, a trifluoromethanesulfonic acid anion, a perfluoroethanesulfonic acid anion and a perfluorobutanesulfonic acid anion.

11 . A process cartridge configured to be detachably attached to a main body of an electrophotographic image forming apparatus, said process cartridge comprising an electrophotographic member and at least one member selected from the group consisting of a charging member, a developing member and a cleaning member;
the electrophotographic member comprising an electroconductive substrate and an electroconductive layer on the substrate, wherein the electroconductive layer comprises a matrix polymer, and an imidazolium salt represented by Formula (1) or Formula (2)

where R11, R13 and R14 independently represent a hydrogen atom or a saturated hydrocarbon group having 1 to 4 carbon atoms, R12 and R15 independently represent a saturated hydrocarbon group having 8 to 20 carbon atoms, and X1 − represents an anion, provided that at least one of R12 and R15 represents a saturated hydrocarbon group having 9 to 20 carbon atoms;

where R21, R22 and R25 independently represent a hydrogen atom or a saturated hydrocarbon group having 1 to 4 carbon atoms, R23 and R24 independently represent a saturated hydrocarbon group having 8 to 20 carbon atoms, and X2 − represents an anion, provided that at least one of R23 and R24 represents a saturated hydrocarbon group having 9 to 20 carbon atoms.

12 . An electrophotographic image forming apparatus, comprising an electrophotographic member and at least one member selected from the group consisting of a charging member, a developing member and a cleaning member;
the electrophotographic member comprising an electroconductive substrate and an electroconductive layer on the substrate, wherein the electroconductive layer comprises a matrix polymer, and an imidazolium salt represented by Formula (1) or Formula (2)

where R11, R13 and R14 independently represent a hydrogen atom or a saturated hydrocarbon group having 1 to 4 carbon atoms, and R12 and R15 independently represent a saturated hydrocarbon group having 8 to 20 carbon atoms, and X1 − represents an anion, provided that at least one of R12 and R15 represents a saturated hydrocarbon group having 9 to 20 carbon atoms;

where R21, R22 and R25 independently represent a hydrogen atom or a saturated hydrocarbon group having 1 to 4 carbon atoms, R23 and R24 independently represent a saturated hydrocarbon group having 8 to 20 carbon atoms, and X2 − represents an anion, provided that at least one of R23 and R24 represents a saturated hydrocarbon group having 9 to 20 carbon atoms.

13 . The electrophotographic member according to claim 2 , wherein the anion is at least one member selected from the group consisting of bis(trifluoromethanesulfonyl)imide anion, a bis(pentafluoroethanesulfonyl)imide anion, a bis(heptafluoropropanesulfonyl)imide anion, a bis(nonafluorobutanesulfonyl)imide anion, a bis(dodecafluoropentanesulfonyl)imide anion, a bis(perfluorohexanesulfonylimide) anion, an N,N-hexafluoropropane-1,3-disulfonylimide anion, a bis(fluorosulfonyl)imide anion, a trifluoromethanesulfonic acid anion, a perfluoroethanesulfonic acid anion and a perfluorobutanesulfonic acid anion.

14 . The electrophotographic member according to claim 3 , wherein the anion is at least one member selected from the group consisting of bis(trifluoromethanesulfonyl)imide anion, a bis(pentafluoroet

Assignees

• Canon Kk

Inventors

• Arimura Hideya
• Yamada Masaki
• Komatsu Hiroaki

Classifications

• G03G15/0233 Primary

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

• G03G15/0808

  characterised by the developer supplying means, e.g. structure of developer supply roller · CPC title

• G03G5/104 Primary

  comprising inorganic material other than metals, e.g. salts, oxides, carbon · CPC title

• G03G21/0058

  using a roller or a polygonal rotating cleaning member; Details thereof, e.g. surface structure (G03G21/0064 takes precedence) · CPC title

• G03G15/0818

  characterised by the structure of the donor member, e.g. surface properties · CPC title