# US 2023/0408941 A1 · Electrophotographic toner and method for producing electrophotographic toner

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

- Number: US 2023/0408941 A1
- Document ID: US20230408941A1
- Status: Published application
- Kind: A1
- Application number: 18/323,690
- Filed: 2023-05-25
- Published: 2023-12-21
- Earliest claimed: 2022-06-16
- Assignees: Konica Minolta, Inc.
- Applicants: Konica Minolta, Inc.
- Inventors: Yohei MARUYAMA; Kazuhiko NAKAJIMA
- Web page: https://patentgrep.com/patent/US20230408941A1

## CPC

- G03G 9/0926: {characterised by physical or chemical properties}
- G03G 9/09385: {Inorganic compounds}
- G03G 9/0902: {Inorganic compounds}
- G03G 9/09328: {obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds}
- G03G 9/09708: {Inorganic compounds}
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

An electrophotographic toner of the present invention includes a toner mother particle including a bright pigment and a resin layer coating the bright pigment. The bright pigment includes a bright portion and a coating layer coating the bright portion, and when the average thickness of the coating layer is A nm and the average thickness of the resin layer is B nm, the electrophotographic toner satisfies A+B≤1.600 nm.

## Claims

### Claim 1

An electrophotographic toner, comprising:
a toner mother particle including a bright pigment and a resin layer coating the bright pigment, wherein
the bright pigment includes a bright portion and a coating layer coating the bright portion, and
when an average thickness of the coating layer is A nm and an average thickness of the resin layer is B nm, the electrophotographic toner satisfies A+B≤1,600 nm.

### Claim 2 (depends on 1)

The electrophotographic toner according to claim 1, wherein the average thickness of the coating layer is in a range of 5 to 100 nm.

### Claim 3 (depends on 1)

The electrophotographic toner according to claim 1, wherein an average major axis diameter of the bright pigment is in a range of 3 to 30 μm.

### Claim 4 (depends on 1)

The electrophotographic toner according to claim 1, wherein the bright portion is aluminum and the coating layer is alumina.

### Claim 5 (depends on 1)

A method for producing the electrophotographic toner according to claim 1, the method comprising coating the bright pigment with the resin layer by a dry coating method.