Electrophotographic photoreceptor, electrophotographic photoreceptor cartridge, image-forming apparatus, and triarylamine compound

Patent metadata

Field	Value
Publication number	US-9507284-B2
Application number	US-201514609543-A
Country	US
Kind code	B2
Filing date	Jan 30, 2015
Priority date	Jul 31, 2012
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

The present invention relates to an electrophotographic photoreceptor comprising an electroconductive support and at least a photosensitive layer formed on the support, wherein the photosensitive layer contains a specific charge transport substance.

First claim

The invention claimed is:

1. A compound represented by the formula (1):

wherein Ar 1 represents an aryl group having an alkoxy group, an aryloxy group, or an aralkyloxy group as a substituent, Ar 2 to Ar 5 each independently represent an aryl group which may have a substituent, Ar 6 to Ar 9 each independently represent a 1,4-phenylene group which may have a substituent; R 1 to R 4 each independently represent a hydrogen atom or an alkyl group; m and n each independently represent an integer of 1 or more and 3 or less; in the case where m or n is 2 or more, plurally existing R 1 s to R 4 s each may be the same or different from each other.

2. The compound according to claim 1 , wherein, in the above formula (1), Ar 1 is a phenyl group having an alkoxy group having 8 or less carbon atoms, Ar 2 to Ar 5 each independently are a phenyl group which may have an alkyl group having 1 to 6 carbon atoms or an alkoxy group having 1 to 6 carbon atoms as a substituent, Ar 6 to Ar 9 each independently are a 1,4-phenylene group which may have an alkyl group having 1 to 6 carbon atoms, R 1 to R 4 are a hydrogen atom, and m and n are both 1.

3. The compound according to claim 2 , wherein, in the above formula (1), Ar 2 to Ar 5 each independently are a phenyl group which may have an alkyl group having 1 to 6 carbon atoms and Ar 6 to Ar 9 are a 1,4-phenylene group.

4. An electrophotographic photoreceptor comprising an electroconductive support and at least a photosensitive layer formed on the support, wherein the photosensitive layer contains a charge transport substance represented by the following formula (1):

wherein Ar 1 represents an aryl group having an alkoxy group, an aryloxy group, or an aralkyloxy group as a substituent, Ar 2 to Ar 5 each independently represent an aryl group which may have a substituent, Ar 6 to Ar 9 each independently represent a 1,4-phenylene group which may have a substituent; R 1 to R 4 each independently represent a hydrogen atom or an alkyl group; m and n each independently represent an integer of 1 or more and 3 or less; in the case where m or n is 2 or more, plurally existing R 1 s to R 4 s each may be the same or different from each other.

5. The electrophotographic photoreceptor according to claim 1 , wherein the photosensitive layer contains oxytitanium phthalocyanine of crystal form which shows a diffraction peak at Bragg angles (2θ±0.2°) of at least 24.1° and 27.2° in a powder X-ray diffraction spectrum with a CuKα characteristic X-ray.

6. The electrophotographic photoreceptor according to claim 1 , wherein the photosensitive layer further contains at least either one of a polyarylate resin and a polycarbonate resin.

7. The electrophotographic photoreceptor according to claim 1 , wherein the photosensitive layer comprises a charge transport layer and a charge generation layer and the charge transport layer contains a charge transport substance represented by the above formula (1) and at least either one of a polyarylate resin having a structural unit represented by the formula (α) and a polycarbonate resin having a structural unit represented by the formula (β):

wherein Ar 10 to Ar 13 each independently represent an arylene group which may have a substituent, X represents a single bond, an oxygen atom, a sulfur atom, or an alkylene group; v represents an integer of 0 or more and 2 or less; and Y represents a single bond, an oxygen atom, a sulfur atom, or an alkylene group,

wherein R 7 and R 8 each independently represent a hydrogen atom, an aryl group, or an alkyl group having 1 to 10 carbon atoms and the R 7 and R 8 groups may be combined to form a ring; R 9 and R 10 each independently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms and j and k each independently represent an integer of 0 to 4; W represents a single bond, an oxygen atom, or —CR 11 R 12 — and the R 11 and R 12 groups each independently represent a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or a phenyl group; t and u each independently represent a numeral of 0 to 100; provided that the units represented by t and u have different structures and there is no case of t=u=0.

8. An electrophotographic photoreceptor cartridge comprising: the electrophotographic photoreceptor according to claim 4 ; and at least one device selected from the group consisting of a charging device which charges the electrophotographic photoreceptor, an exposure device which exposes the charged electrophotographic photoreceptor to form an electrostatic latent image, and a developing device which develops the electrostatic latent image formed on the electrophotographic photoreceptor.

9. An image-forming apparatus comprising: the electrophotographic photoreceptor according to claim 1 ; a charging device which charges the electrophotographic photoreceptor; an exposure device which exposes the charged electrophotographic photoreceptor to form an electrostatic latent image; and a developing device which develops the electrostatic latent image formed on the electrophotographic photoreceptor.

Assignees

• Mitsubishi Chem Corp

Inventors

• Wada Mitsuo
• Fuchigami Hiroe

Classifications

• G03G5/14708

  comprising organic material · CPC title

• C07C217/92

  the nitrogen atom of at least one of the amino groups being further bound to a carbon atom of a six-membered aromatic ring · CPC title

• C07C217/94

  having amino groups bound to carbon atoms of six-membered aromatic rings being part of condensed ring systems and etherified hydroxy groups bound to carbon atoms of six-membered aromatic rings of the same carbon skeleton · CPC title

• G03G5/14756

  Polycarbonates · CPC title

• G03G5/0564

  Polycarbonates · CPC title