# US 5,707,768 A · Diamine compounds and electrophotographic photoreceptor

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- Number: US 5,707,768 A
- Document ID: US5707768A
- Status: Granted
- Kind: A
- Application number: 08/563,823
- Filed: 1995-11-28
- Granted: 1998-01-13
- Earliest claimed: 1994-11-30
- Assignees: Hodogaya Chemical Co., Ltd.
- Inventors: Mitsutoshi Anzai; Atsushi Takesue; Takanobu Watanabe; Chieko Inayoshi
- Web page: https://patentgrep.com/patent/US5707768A

## CPC

- C07C 211/50: with at least two amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton
- G03G 5/061443: {benzidine}
- G03G 5/0637: {containing one hetero atom}
- C07C 2602/10: the other ring being six-membered, e.g. tetraline
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

A diamine compound of the following formula (1): ##STR1## wherein R.sub.1 is a hydrogen atom, a lower alkyl group or a lower alkoxy group, each of A.sub.1, A.sub.2 and A.sub.3 which are independent of one another, is a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a group of the following formula (2): ##STR2## wherein R.sub.1 is as defined above, and X is a substituted or unsubstituted arylene group or a substituted or unsubstituted heterocyclic bivalent group.

## Claims

### Claim 1

A electrophotographic photoreceptor comprising an electrically conductive substrate having a photosensitive layer thereon which contains a binder resin, a charge generating material or a sensitizing dye, and a diamine compound of the following formula (1): ##STR569## wherein R.sub.1 is a hydrogen atom, a C.sub.1-4 alkyl group or a C.sub.1-4 alkoxy group, each of A.sub.1, A.sub.2 and A.sub.3 which are independent of one another, is a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a group of the following formula (2): ##STR570## wherein R.sub.1 is as defined above, and X is a substituted or unsubstituted arylene group or a substituted or unsubstituted heterocyclic bivalent group, and wherein the substituent for the substituted alkyl group for each of A.sub.1, A.sub.2 and A.sub.3 is a C.sub.1-4 alkoxy group which may be substituted by a C.sub.1-4 alkoxy group or a halogen atom, a C.sub.5-6 cycloalkyl group, a benzyl or phenyl group which may be substituted by a C.sub.1-4 alkyl group, a C.sub.1-4 alkoxy group or a halogen atom; the substituent for the substituted aryl group for each of A.sub.1, A.sub.2 and A.sub.3 is a C.sub.1-4 alkyl or alkoxy group which may be substituted by a C.sub.1-4 alkoxy group or a halogen atom, a C.sub.5-6 cycloalkyl group, a benzyl or phenyl group which may be substituted by a C.sub.1-4 alkyl or alkoxy group or a halogen atom, or a halogen atom; and the substituent for the substituted arylene or heterocyclic bivalent group for X is the some as the above-identified substituent for the substituted aryl group for each of A.sub.1, A.sub.2 and A.sub.3.

### Claim 2 (depends on 1)

The electrophotographic photoreceptor according to claim 1, wherein the diamine compound is represented by the following formula: ##STR571## wherein R.sub.1, A.sub.1, A.sub.3 and X are as defined above.

### Claim 3 (depends on 1)

The electrophotographic photoreceptor according to claim 1, wherein the diamine compound is represented by the following formula: ##STR572## wherein R.sub.1, A.sub.1, A.sub.2 and A.sub.3 are as defined above.

### Claim 4 (depends on 1)

The electrophotographic photoreceptor according to claim 1, wherein the diamine compound is represented by the following formula: ##STR573## wherein R.sub.1, A.sub.1 and A.sub.3 are as defined above.

### Claim 5 (depends on 1)

The electrophotographic photoreceptor according to claim 1, wherein the diamine compound is represented by the following formula: ##STR574## wherein R.sub.1 is as defined above, and each of R.sub.2 and R.sub.3 which are independent of each other, is a hydrogen atom, a C.sub.1-4 alkyl group or a C.sub.1-4 alkoxy group.

### Claim 6 (depends on 1)

The electrophotographic photoreceptor according to claim 1, wherein the arylene group for X is phenylene, biphenylene, terphenylene, naphthylene, anthrylene, phenanthrylene, fluorene-diyl or a group of the following formula (12): ##STR575## wherein Y is --O--, --S--, --SO.sub.2 --, --CH.dbd.CH--, --CH.sub.2 --, --CH.sub.2 CH.sub.2 --, --OCH.sub.2 O--, --OCH.sub.2 CH.sub.2 O--, ##STR576##

### Claim 7 (depends on 1)

The electrophotographic photoreceptor according to claim 1, wherein the heterocyclic ring for the heterocyclic bivalent group for X is oxadiazole, thiadiazole, benzofuran, benzothiophene, benzoxazole, benzothiazole, dibenzofuran, dibenzothiophene, carbazole, acridine, phenazine, phenoxazine or phenothiazine.