Yellow toner

Patent metadata

Field	Value
Publication number	US-10289017-B2
Application number	US-201615568952-A
Country	US
Kind code	B2
Filing date	Apr 26, 2016
Priority date	Apr 28, 2015
Publication date	May 14, 2019
Grant date	May 14, 2019

Abstract

Provided is a yellow toner which provides a sharper color than ever before in small amounts and which has excellent light resistance. A yellow toner comprising a binder resin and a yellow colorant, wherein a compound A represented by the following general formula (1) and a compound B represented by the following general formula (2) are contained as the yellow colorant, and wherein a total content of the compound A and the compound B is from 3 to 30 parts by mass with respect to 100 parts by mass of the binder resin, and a mass ratio of the content of the compound A to the content of the compound B (compound A/compound B) is from 0.8 to 20:

First claim

The invention claimed is:

1. A yellow toner comprising a binder resin and a yellow colorant,
wherein a compound A represented by the following general formula (1) and a compound B represented by the following general formula (2) are contained as the yellow colorant, and
wherein a total content of the compound A and the compound B is from 3 to 30 parts by mass with respect to 100 parts by mass of the binder resin, and a mass ratio of the content of the compound A to the content of the compound B (compound A/compound B) is from 0.8 to 20:

where R 1A , R 1B , R 2A and R 2B are each independently a halogen atom, an alkyl group, a methoxy group, an amino group, a nitro group, an acetylamido group (—NHCOCH 3 ), a methyl ester group (—COOCH 3 ) or a primary amide group (—CONH 2 ); R 3 is a halogen atom; R 4 and R 5 are each independently a halogen atom, an alkyl group, a methoxy group, an amino group, a nitro group, an acetylamido group (—NHCOCH 3 ), an acetyl group (—COCH 3 ), a methyl ester group (—COOCH 3 ) or a primary amide group (—CONH 2 ); a1 and b1 are positive integers that a sum of the positive integers is 2 or 3; a2 and b2 are positive integers that a sum of the positive integers is 2 or 3; c is an integer of 1 or more and 3 or less; and d and e are each independently 1 or 2,

where R 6 is an alkyl group.

2. The yellow toner according to claim 1 , wherein the compound A represented by the general formula (1) is selected from the group consisting of C.I. Pigment Yellow 214 and C.I. Pigment Yellow 219.

3. The yellow toner according to claim 1 , wherein the compound B represented by the general formula (2) is C.I. Solvent Yellow 98.

4. The yellow toner according to claim 1 , wherein a content of the compound A is 1 to 28 parts by mass with respect to 100 parts by mass of the binder resin.

5. The yellow toner according to claim 1 , wherein a content of the compound B is 0.5 to 12 parts by mass with respect to 100 parts by mass of the binder resin.

Assignees

• Zeon Corp

Inventors

• Otake Takuya

Classifications

• G03G9/0914

  Acridine; Azine; Oxazine; Thiazine-;(Xanthene-) dyes · CPC title

• G03G9/0906

  Organic dyes · CPC title

• G03G9/091 Primary

  Azo dyes · CPC title

• G03G9/0916

  Quinoline; Polymethine dyes · CPC title