# US 2019/0171124 A1 · Yellow toner

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- Number: US 2019/0171124 A1
- Document ID: US20190171124A1
- Status: Published application
- Kind: A1
- Application number: 16/327,488
- Filed: 2017-08-18
- Published: 2019-06-06
- Earliest claimed: 2016-08-31
- Assignees: Zeon Corporation
- Applicants: Zeon Corporation
- Inventors: Keita Tokura
- Web page: https://patentgrep.com/patent/US20190171124A1

## CPC

- G03G 9/091: {Azo dyes}
- G03G 9/08711: {with esters of acrylic or methacrylic acid}
- G03G 9/08753: {Epoxyresins}
- G03G 9/08755: {Polyesters}
- G03G 9/0806: {whereby chemical synthesis of at least one of the toner components takes place}
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

A yellow toner that is, even in small amounts, better in chroma than ever before. Disclosed is a yellow toner comprising a binder resin and a yellow colorant, wherein, as the yellow colorant, a compound A represented by the following general formula (1) and a compound B represented by the following formula (2) or (3) are contained, and wherein, with respect to 100 parts by mass of the binder resin, a content of the compound A is from 1 part by mass to 15 parts by mass, and a content of the compound B is from 0.1 part by mass to 8.0 parts by mass:

## Claims

### Claim 1

A yellow toner comprising a binder resin and a yellow colorant,
wherein, as the yellow colorant, a compound A represented by the following general formula (1) and a compound B represented by the following formula (2) or (3) are contained, and
wherein, with respect to 100 parts by mass of the binder resin, a content of the compound A is from 1 part by mass to 15 parts by mass, and a content of the compound B is from 0.1 part by mass to 8.0 parts by mass:
where R1A, R1B, R2A and R2B are each independently a halogen atom, an alkyl group, an alkoxy group, an amino group, a nitro group, an acetylamido group (—NHCOCH3), a methyl ester group (—COOCH3) or a primary amide group (—CONH2); R3 is a halogen atom; R4 and R5 are each independently a halogen atom, an alkyl group, a methoxy group, an amino group, a nitro group, an acetylamido group (—NHCOCH3), an acetyl group (—COCH3), a methyl ester group (—COOCH3) or a primary amide group (—CONH2); a1 and b1 are non-negative integers that a sum of the non-negative integers a1 and b1 is 1 or more and 3 or less; a2 and b2 are non-negative integers that a sum of the non-negative integers a2 and b2 is 1 or more and 3 or less; c is an integer of 1 or more and 3 or less; and d and e are each independently 1 or 2,

### Claim 2 (depends on 1)

The yellow toner according to claim 1, wherein a mass ratio of the content of the compound A to the content of the compound B (compound A/compound B) is from 0.1 to 10.0.