# US 5,346,794 A · Electrophotographic toner

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,346,794 A
- Document ID: US5346794A
- Status: Granted
- Kind: A
- Application number: 08/010,575
- Filed: 1993-01-28
- Granted: 1994-09-13
- Earliest claimed: 1992-03-03
- Assignees: Hodogaya Chemical Co., Ltd.
- Inventors: Mitsutoshi Anzai; Yuji Matsuura; Osamu Mukudai; Miki Kanno; Kayoko Watanabe
- Web page: https://patentgrep.com/patent/US5346794A

## CPC

- G03G 9/09775: {containing atoms other than carbon, hydrogen or oxygen (G03G9/09741 - G03G9/09766 take precedence)}
- G03G 9/09733: {Organic compounds (G03G9/08782 takes precedence)}
- G03G 9/09766: {comprising fluorine}
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

An electrophotographic toner containing a compound of the following formula (I): ##STR1## wherein each of X and Y which are independent of each other, is a hydrogen atom, ##STR2## (wherein each of A.sub.1 and A.sub.2 is a hydrogen atom or an electron attracting group, provided that A.sub.1 and A.sub.2 are not simultaneously hydrogen atoms, R.sub.1 is a hydrogen atom, a halogen atom, an alkyl group, a cycloalkyl group, an aralkyl group, an aryl group, an alkoxy group, a dialkylamino group, a diarylamino group, a diaralkylamino group or a hydroxyl group, and n is 0, 1 or 2, provided that when n is 2, the plurality of R.sub.1 may be the same or different), ##STR3## (wherein A.sub.3 is an electron attracting group, and R.sub.1 and n are as defined above), ##STR4## (wherein A.sub.3, R.sub.1 and n are as defined above), ##STR5## (wherein A.sub.3, R.sub.1 and n are as defined above) or ##STR6## (wherein A.sub.3 is as defined above, and each of R.sub.2 and R.sub.3 is a hydrogen atom, an alkyl group, a cycloalkyl group, an aralkyl group, an aryl group, an alkoxy group or a hydroxyl group), provided that X and Y are not simultaneously hydrogen atoms, and Z is a hydrogen atom, an alkyl group or an aryl group.

## Claims

### Claim 1

An electrophotographic toner containing a charge control agent of the following formula (I): ##STR14## wherein each of X and Y which are independent of each other, is a hydrogen atom, ##STR15## (wherein each of A.sub.1 and A.sub.2 is a hydrogen atom or an electron attracting group, provided that A.sub.1 and A.sub.2 are not simultaneously hydrogen atoms, R.sub.1 is a hydrogen atom, a halogen atom, an alkyl group, a cycloalkyl group, an aralkyl group, an aryl group, an alkoxy group, a dialkylamino group, a diarylamino group, a diaralkylamino group or a hydroxyl group, and n is 0, 1 or 2, provided that when n is 2, the plurality of R.sub.1 may be the same or different), ##STR16## (wherein A.sub.3 is an electron attracting group, and R.sub.1 and n are as defined above), ##STR17## (wherein A.sub.3, R.sub.1 and n are as defined above), ##STR18## (wherein A.sub.3, R.sub.1 and n are as defined above) or ##STR19## (wherein A.sub.3 is as defined above, and each of R.sub.2 and R.sub.3 is a hydrogen atom, an alkyl group, a cycloalkyl group, an aralkyl group, an aryl group, an alkoxy group or a hydroxyl group), provided that X and Y are not simultaneously hydrogen atoms, and Z is a hydrogen atom, an alkyl group or an aryl group.

### Claim 2 (depends on 1)

The electrophotographic toner according to claim 1, which comprises 100 parts by weight of a binder resin, from 1 to 15 parts by weight of a coloring agent and from 0.1 to 10 parts by weight of the compound of the formula (I).

### Claim 3 (depends on 1)

The electrophotographic toner according to claim 1, wherein the electron attracting group for each of A.sub.1, A.sub.2 and A.sub.3 is a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, a halogen-substituted alkyl group, a halogen-substituted aryl group, a cyano group, a formyl group, a carboxyl group, carbamoyl group, an N-substituted carbamoyl group, an alkoxycarbonyl group, an acyloxy group, an acyl group, an arylcarbonyl group, a nitro group, a sulfonic acid group, an alkylsulfo group, a substituted sulfonyl group, a sulfamoyl group, an N-substituted sulfamoyl group or a substituted sulfinyl group.

### Claim 4 (depends on 1)

The electrophotographic toner according to claim 1, wherein the compound of the formula (I) is one of the following compounds: ##STR20##

### Claim 5 (depends on 1)

The electrophotographic toner according to claim 1, wherein Z is a hydrogen atom.

### Claim 6 (depends on 1)

The electrophotographic toner according to claim 1, wherein Z is an alkyl group.

### Claim 7 (depends on 1)

The electrophotographic toner according to claim 1, wherein Z is an aryl group.

### Claim 8 (depends on 1)

The electrophotographic toner according to claim 1, wherein n is zero.

### Claim 9 (depends on 1)

The electrophotographic toner according to claim 1, wherein n is 1.

### Claim 10 (depends on 1)

The electrophotographic toner according to claim 1, wherein n is 2.