# US 2010/0167192 A1 · Electrophotographic photoreceptor, process cartridge, and image forming apparatus

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- Number: US 2010/0167192 A1
- Document ID: US20100167192A1
- Status: Published application
- Kind: A1
- Application number: 12/430,731
- Filed: 2009-04-27
- Published: 2010-07-01
- Earliest claimed: 2008-12-25
- Assignees: Fuji Xerox Co., Ltd.
- Inventors: Wataru YAMADA; Katsumi NUKADA; Takatsugu DOI; Akira HIRANO; Hitoshi TAKIMOTO
- Web page: https://patentgrep.com/patent/US20100167192A1

## CPC

- G03G 5/06142: {arylamine}
- G03G 5/0532: {obtained by reactions only involving carbon-to-carbon unsatured bonds}
- G03G 5/0546: {Polymers comprising at least one carboxyl radical, e.g. polyacrylic acid, polycrotonic acid, polymaleic acid; Derivatives thereof, e.g. their esters, salts, anhydrides, nitriles, amides}
- G03G 5/0592: {Macromolecular compounds characterised by their structure or by their chemical properties, e.g. block polymers, reticulated polymers, molecular weight, acidity}
- G03G 5/061443: {benzidine}
- G03G 5/06147: {alkenylarylamine}
- G03G 5/072: {comprising pending monoamine groups}
- G03G 5/074: {comprising pending diamine}
- G03G 5/14708: {comprising organic material}
- G03G 5/14717: {obtained by reactions only involving carbon-to-carbon unsaturated bonds}
- G03G 5/14734: {Polymers comprising at least one carboxyl radical, e.g. polyacrylic acid, polycrotonic acid, polymaleic acid; Derivatives thereof, e.g. their esters, salts, anhydrides, nitriles, amides}
- G03G 5/14786: {Macromolecular compounds characterised by specific side-chain substituents or end groups}
- G03G 5/14791: {Macromolecular compounds characterised by their structure, e.g. block polymers, reticulated polymers, or by their chemical properties, e.g. by molecular weight or acidity}
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

The invention provides an electrophotographic photoreceptor having at least a conductive substrate and a photosensitive layer formed on the conductive substrate wherein the outermost surface layer of the photoreceptor is composed of a cured material containing at least one compound represented by the formula (I) and a surfactant that contains, in the molecule thereof, at least one structure selected from (A) a structure that is obtained by polymerizing an acrylic monomer having a fluorine atom, (B) a structure having a carbon-carbon double bond and a fluorine atom, (C) an alkyleneoxide structure, and (D) a structure having a carbon-carbon triple bond and a hydroxy group. In formula (I), Q is an organic group having a valency of n and having hole transportability, R is a hydrogen atom or an alkyl group, L is a divalent organic group, n is 1 or more, and j is 0 or 1.

## Claims

### Claim 1

An electrophotographic photoreceptor comprising at least
a conductive substrate,
a photosensitive layer formed on the conductive substrate, and
an outermost surface layer of the electrophotographic photoreceptor being composed of a cured material of a composition comprising
at least one compound represented by the following formula (I) and
a surfactant having, in the molecule thereof, at least one structure selected from (A) a structure obtained by polymerizing an acrylic monomer having a fluorine atom, (B) a structure having a carbon-carbon double bond and a fluorine atom, (C) an alkylene oxide structure, and (D) a structure having a carbon-carbon triple bond and a hydroxyl group,
wherein in formula (I), Q is an organic group having a valency of n and having hole transportability; R is hydrogen atom or an alkyl group; L is a divalent organic group; n is an integer of 1 or more; and j is 0 or 1.

### Claim 2 (depends on 1)

The electrophotographic photoreceptor according to claim 1, wherein the composition contains a heat radical generating agent.

### Claim 3 (depends on 2)

The electrophotographic photoreceptor according to claim 2, wherein
the heat radical generating agent has a 10 hour half-life temperature of from about 40° C. to about 110° C.

### Claim 4 (depends on 1)

The electrophotographic photoreceptor according to claim 1, wherein R in formula (I) is methyl group.

### Claim 5 (depends on 1)

The electrophotographic photoreceptor according to claim 1, wherein n in formula (I) is an integer of 2 or more.

### Claim 6 (depends on 1)

The electrophotographic photoreceptor according to claim 1, wherein L in formula (I) is a divalent organic group including an alkylene group having 2 or more carbon atoms and j is 1.

### Claim 7 (depends on 1)

The electrophotographic photoreceptor according to claim 1, wherein n in formula (I) is an integer of 4 or more.

### Claim 8 (depends on 1)

The electrophotographic photoreceptor according to claim 1, wherein the total content of the compound represented by formula (I) is about 40% by weight or more, with respect to the composition that is used when the outermost surface layer is formed.

### Claim 9 (depends on 1)

The electrophotographic photoreceptor according to claim 1, wherein the total content of the surfactant is from about 0.01% by weight to about 1% by weight, with respect to the composition that is used when the outermost surface layer is formed.

### Claim 10 (depends on 1)

The electrophotographic photoreceptor according to claim 1, wherein the compound represented by formula (I) is a compound represented by the following formula (II),
wherein in formula (II), Ar1 to Ar4 are, each independently, a substituted or unsubstituted aryl group; Ar5 is a substituted or unsubstituted aryl group or a substituted or unsubstituted arylene group; D is -(L)j-O—CO—C(R)═CH2; the five c's are, each independently, 0 or 1; k is 0 or 1; the total number of D is 1 or more; and R is hydrogen atom or a straight chain or branched chain alkyl group having from 1 to 5 carbon atoms.

### Claim 11 (depends on 9)

The electrophotographic photoreceptor according to claim 9, wherein the total number of D in formula (II) is 4 or more.

### Claim 12 (depends on 9)

The electrophotographic photoreceptor according to claim 9, wherein R in formula (II) is methyl group.

### Claim 13 (depends on 9)

The electrophotographic photoreceptor according to claim 9, wherein L in formula (II) is a divalent organic group including an alkylene group having 2 or more carbon atoms, and j is 1.

### Claim 14 (depends on 1)

A process cartridge comprising
the electrophotographic photoreceptor according to claim 1, and
at least one unit selected from a charging unit that charges the electrophotographic photoreceptor, a developing unit that develops an electrostatic latent image formed on the electrophotographic photoreceptor with toner, and a toner removing unit that removes toner remaining on the surface of the electrophotographic photoreceptor.

### Claim 15 (depends on 1)

An image forming apparatus comprising
the electrophotographic photoreceptor according to claim 1,
a charging unit that charges the electrophotographic photoreceptor,
an electrostatic latent image forming unit that forms an electrostatic latent image on the charged electrophotographic photoreceptor,
a developing unit that forms a toner image by developing the electrostatic latent image formed on the electrophotographic photoreceptor with toner, and
a transfer unit that transfers the toner image to a transfer body.