Conductive member for electrophotographic machine

Patent metadata

Field	Value
Publication number	US-10018935-B2
Application number	US-201715488896-A
Country	US
Kind code	B2
Filing date	Apr 17, 2017
Priority date	Oct 28, 2014
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

To provide a conductive member for an electrophotographic machine that is capable of preventing hardening degradation of a surface layer that is caused by an ionic conductive agent contained in a conductive rubber elastic body layer, allowing the surface layer to be improved in durability.
A conductive member 10 for an electrophotographic machine includes a conductive rubber elastic body layer 14 containing crosslinked rubber and an ionic conductive agent, and a surface layer 16 provided on an outer periphery of the conductive rubber elastic body layer 14 , wherein the surface layer 16 contains a polymer and polyphenol. Examples of the polyphenol include a tannin, gallic acid, ellagic acid, pyrogallol, catechin, and chlorogenic acid.

First claim

The invention claimed is:

1. A conductive member for an electrophotographic machine, the member comprising:
a conductive rubber elastic body layer comprising a crosslinked rubber and an ionic conductive agent; and
a surface layer provided on an outer periphery of the conductive rubber elastic body layer, the surface layer comprising:
a polymer; and
a polyphenol.

2. The conductive member for an electrophotographic machine according to claim 1 ,
wherein the ionic conductive agent comprises anions that comprise one or more kinds selected from the group consisting of perchlorate anions, bis(trifluoromethanesulfonyl)imide anions, trifluoromethanesulfonate anions, chloride anions, bromide anions, and p-toluenesulfonate anions.

3. The conductive member for an electrophotographic machine according to claim 2 ,
wherein the polyphenol comprises one or more kinds selected from the group consisting of a tannin, gallic acid, ellagic acid, pyrogallol acid, catechin, and chlorogenic acid.

4. The conductive member for an electrophotographic machine according to claim 3 , wherein the tannin comprises a hydrolyzable tannin.

5. The conductive member for an electrophotographic machine according to claim 4 , wherein the surface layer comprises a nylon.

6. The conductive member for an electrophotographic machine according to claim 5 , wherein the surface layer comprises N-methoxymethylated nylon.

7. The conductive member for an electrophotographic machine according to claim 6 , wherein the anions comprise the perchlorate anions.

8. The conductive member for an electrophotographic machine according to claim 7 , wherein the conductive member is a charging roll.

9. The conductive member for an electrophotographic machine according to claim 6 , wherein the anions comprise the bis(trifluoromethanesulfonyl)imide anions.

10. The conductive member for an electrophotographic machine according to claim 9 , wherein the conductive member is a charging roll.

11. The conductive member for an electrophotographic machine according to claim 2 , wherein the anions comprise perchlorate anions.

12. The conductive member for an electrophotographic machine according to claim 11 , wherein the conductive member is a charging roll.

13. The conductive member for an electrophotographic machine according to claim 2 , wherein the anions comprise the bis(trifluoromethanesulfonyl)imide anions.

14. The conductive member for an electrophotographic machine according to claim 1 ,
wherein the polyphenol comprises one or more kinds selected from the group consisting of a tannin, gallic acid, ellagic acid, pyrogallol acid, catechin, and chlorogenic acid.

15. The conductive member for an electrophotographic machine according to claim 14 , wherein the tannin comprises a hydrolyzable tannin.

16. The conductive member for an electrophotographic machine according to claim 15 , wherein the conductive member is a charging roll.

17. The conductive member for an electrophotographic machine according to claim 1 , wherein the surface layer comprises a nylon.

18. The conductive member for an electrophotographic machine according to claim 17 , wherein the surface layer comprises N-methoxymethylated nylon.

19. The conductive member for an electrophotographic machine according to claim 18 , wherein the conductive member is a charging roll.

20. The conductive member for an electrophotographic machine according to claim 1 , wherein the conductive member is a charging roll.

Assignees

• Sumitomo Riko Co Ltd

Inventors

• Ishida Masanori
• Ootani Takayuki
• Ito Kunio
• Tokoro Keisuke

Classifications

• C08K2201/001

  Conductive additives · CPC title

• C08K3/04

  Carbon · CPC title

• C08K5/19

  Quaternary ammonium compounds · CPC title

• G03G15/0233 Primary

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

• C08K5/134

  Phenols containing ester groups · CPC title