Electron transport material, electrophotographic photoreceptor, process cartridge, and image forming apparatus

Patent metadata

Field	Value
Publication number	US-9335644-B2
Application number	US-201514617263-A
Country	US
Kind code	B2
Filing date	Feb 9, 2015
Priority date	Sep 22, 2014
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

Provided is an electron transport material represented by formula (1):

wherein X represents an oxygen atom or ═C(CN) 2 ; R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , and R 7 each independently represent a hydrogen atom, a halogen atom, a linear or branched alkyl group, an alkoxy group, an aryl group, or an aralkyl group; R 8 , R 9 , and R 10 each independently represent a hydrogen atom, a halogen atom, a linear or branched alkyl group, an aralkyl group, an aryl group, —R 11 —O—R 12 , or —R 13 —CO—O—R 14 ; R 11 represents a linear or branched alkylene group; R 12 represents a linear or branched alkyl group; R 13 represents a single bond or a linear or branched alkylene group; and R 14 represents a linear or branched alkyl group, an aryl group, or an aralkyl group, provided that at least two or more groups of R 8 , R 9 , and R 10 represent a group other than a hydrogen atom.

First claim

What is claimed is:

1. An electron transport material represented by the following formula (1):

wherein in the formula (1), X represents an oxygen atom or ═C(CN) 2 ; R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , and R 7 each independently represent a hydrogen atom, a halogen atom, a linear or branched alkyl group having 1 to 20 carbon atoms, an alkoxy group, an aryl group, or an aralkyl group; R 8 , R 9 , and R 1′ each independently represent a hydrogen atom, a halogen atom, a linear or branched alkyl group having 1 to 20 carbon atoms, an aralkyl group, an aryl group, —R 11 —O—R 12 , or —R 13 —CO—O—R 14 ; R 11 represents a linear or branched alkylene group having 1 to 10 carbon atoms; R 12 represents a linear or branched alkyl group having 1 to 10 carbon atoms; R 13 represents a single bond or a linear or branched alkylene group having 1 to 10 carbon atoms; and R 14 represents a linear or branched alkyl group having 1 to 10 carbon atoms, an aryl group, or an aralkyl group, provided that at least two or more groups of R 8 , R 9 , and R 10 represent a group other than a hydrogen atom.

2. The electron transport material according to claim 1 , wherein at least one of R 8 , R 9 , and R 10 represents an organic group having 1 or more carbon atoms.

3. The electron transport material according to claim 2 , wherein the organic group is a group selected from an alkyl group, an aralkyl group, an aryl group, —R 11 —O—R 12 (in which R 11 is an alkylene group having 1 to 10 carbon atoms, and R 12 is an alkyl group having 1 to 10 carbon atoms), or —R 13 —CO—O—R 14 (in which R 13 is a single bond or an alkylene group having 1 to 10 carbon atoms, and R 14 is a linear or branched alkyl group having 1 to 10 carbon atoms or an aralkyl group).

4. The electron transport material according to claim 1 , wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , and R 7 each independently represent a hydrogen atom, a halogen atom, or a linear or branched alkyl group having 1 to 20 carbon atoms; R 8 and R 9 represent a linear or branched alkyl group having 1 to 10 carbon atoms or an aralkyl group and R 10 represents a hydrogen atom.

5. The electron transport material according to claim 1 , wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , and R 7 each independently represent a hydrogen atom, a halogen atom, or an alkyl group having 1 to 10 carbon atoms; R 8 and R 9 both represent a branched alkyl group having 3 to 10 carbon atoms or an aralkyl group represented by —R 17 —Ar 18 (R 17 represents a branched alkylene group having 3 to 10 carbon atoms, and Ar 18 represents an unsubstituted phenyl group); and R 10 represents a hydrogen atom.

6. An electrophotographic photoreceptor comprising a conductive substrate and a photosensitive layer including the electron transport material according to claim 1 provided on the conductive substrate.

7. A process cartridge comprising the electrophotographic photoreceptor according to claim 6 , that is detachable from an image forming apparatus.

8. An image forming apparatus comprising:
the electrophotographic photoreceptor according to claim 6 ;
a charging unit that charges the surface of the electrophotographic photoreceptor;
an electrostatic latent image forming unit that forms an electrostatic latent image on the surface of a charged electrophotographic photoreceptor;
a developing unit that develops the electrostatic latent image formed on the surface of the electrophotographic photoreceptor by a developer containing a toner to form a toner image; and
a transfer unit that transfers the toner image to the surface of a recording medium.

Assignees

• Fuji Xerox Co Ltd

Inventors

• Iwasaki Masahiro
• Yamamoto Shinya
• Korenaga Jiro
• Haruyama Daisuke
• Kawabata Yukimi
• Kusano Keisuke
• Shingu Kenta
• Shoji Yoshifumi

Classifications

• C07C255/41

  the carbon skeleton being further substituted by carboxyl groups, other than cyano groups · CPC title

• G03G5/10 Primary

  Bases for charge-receiving or other layers · CPC title

• C07C69/76

  Esters of carboxylic acids having a carboxyl group bound to a carbon atom of a six-membered aromatic ring · CPC title

• C07C69/86

  with esterified hydroxyl groups · CPC title

• C07C69/94

  of polycyclic hydroxy carboxylic acids, the hydroxy groups and the carboxyl groups of which are bound to carbon atoms of six-membered aromatic rings · CPC title