Yellow toner

Patent metadata

Field	Value
Publication number	US-10088768-B2
Application number	US-201615561590-A
Country	US
Kind code	B2
Filing date	Mar 23, 2016
Priority date	Mar 31, 2015
Publication date	Oct 2, 2018
Grant date	Oct 2, 2018

Abstract

A yellow toner that is, even in small amounts, better in reflection density and chroma than ever before. Disclosed is a yellow toner containing 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) are contained, and wherein, with respect to 100 parts by mass of the binder resin, a content of the compound A is from 0.5 to 7.5 parts by mass, and a content of the compound B is from 2.5 to 9.0 parts by mass:

First claim

The invention claimed is:

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) are contained, and
wherein, with respect to 100 parts by mass of the binder resin, a content of the compound A is from 0.5 to 7.5 parts by mass, and a content of the compound B is from 2.5 to 9.0 parts by mass:

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 1 or more and 3 or less;
a2 and b2 are positive integers that a sum of the positive integers 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,

2. 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 2.5.

3. The yellow toner according to claim 1 , wherein at least any one of the compound A and the compound B is surface-treated with a coupling agent.

Assignees

• Zeon Corp

Inventors

• Otake Takuya

Classifications

• C09B33/153

  in which the coupling component is a bis-(aceto-acetyl amide) or a bis-(benzoyl-acetylamide) · CPC title

• G03G9/091 Primary

  Azo dyes · CPC title

• G03G9/09

  Colouring agents for toner particles · CPC title

• C09B29/33

  Aceto- or benzoylacetylarylides · CPC title

• C07C245/12

  Diazo compounds, i.e. compounds having the free valencies of >N2 groups attached to the same carbon atom · CPC title