# US 5,352,834 A · Electrophotographic member

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- Number: US 5,352,834 A
- Document ID: US5352834A
- Status: Granted
- Kind: A
- Application number: 07/895,015
- Filed: 1992-06-08
- Granted: 1994-10-04
- Earliest claimed: 1990-09-04
- Assignees: Hitachi Chemical Company, Ltd.
- Inventors: Yoshii Morishita; Yasushi Sugimoto; Shigeru Hayashida; Hiroko Ishikawa; Yoshiaki Noda; Shigeru Murakami; Munehiro Sato; Yoshinori Saito; Naoji Kurata; Yoshio Sugita
- Web page: https://patentgrep.com/patent/US5352834A

## CPC

- G03G 5/061443: {benzidine}
- C07C 211/56: the carbon skeleton being further substituted by halogen atoms or by nitro or nitroso groups
- C07C 217/92: the nitrogen atom of at least one of the amino groups being further bound to a carbon atom of a six-membered aromatic ring
- G03G 5/06142: {arylamine}
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS

## Abstract

Disclosed is an electrophotographic member containing as a charge transport material a fluorine-containing N,N,N',N'-tetraarylbenzidine derivative which is remarkably excellent in solubility in an organic solvent and/or a binder such as polycarbonate resin, etc., can show very excellent electrophotographic properties such as high sensitivity, low residual potential and high durability. Further, a fluorine-containing N,N,N',N'-tetraarylbenzidine derivative usable as a charge transport material, and a process for producing the same are disclosed. Furthermore, a fluorine-containing diarylamine usable for producing the fluorine-containing N,N,N',N'-tetraarylbenzidine derivative, and a process for producing the same are disclosed.

## Claims

### Claim 1

A fluorine-containing N,N,N',N'-tetraarylbenzidine derivative of the formula: ##STR92## wherein R.sub.1 and R.sub.2 are independently a hydrogen atom, an alkyl group, an alkoxy group, a fluoroalkyl group or a fluoroalkoxy group, at least one of R.sub.1 and R.sub.2 is a fluoroalkyl group or a fluoroalkoxy group; and Ar.sup.1 and Ar.sup.2 are independently an aryl group which may have one or more substituents other than R.sub.1 and R.sub.2.

### Claim 2 (depends on 1)

A fluorine-containing N,N,N',N'-tetraarylbenzidine derivative according to claim 1, which is a compound of the formula: ##STR93##

### Claim 3 (depends on 1)

A fluorine-containing N,N,N',N'-tetraarylbenzidine derivative according to claim 1, which is a compound of the formula: ##STR94## wherein R.sub.2 is a hydrogen atom, an alkyl group, an alkoxy group, fluoroalkyl group or a fluoroalkoxy group.

### Claim 4 (depends on 1)

A fluorine-containing N,N,N',N'-tetraarylbenzidine derivative according to claim 1, which is a compound of the formula: ##STR95## wherein Ar.sup.2 is ##STR96## and R.sub.2 is a hydrogen atom or an alkyl group.

### Claim 5 (depends on 1)

A fluorine-containing N,N,N',N'-tetraarylbenzidine derivative according to claim 1, which is a compound of the formula: ##STR97## wherein R.sub.1 is a fluoroalkyl group or a fluoroalkoxy group; Ar.sup.2 is ##STR98## and R.sub.2 is a hydrogen atom, an alkyl group, an alkoxy group, a fluoroalkyl group or a fluoroalkoxy group.