Yellow toner and process for producing the yellow toner

Patent metadata

Field	Value
Publication number	US-9323168-B2
Application number	US-201314376227-A
Country	US
Kind code	B2
Filing date	Mar 6, 2013
Priority date	Mar 7, 2012
Publication date	Apr 26, 2016
Grant date	Apr 26, 2016

Abstract

A yellow toner is provided which is superior in dispersibility of C. I. pigment yellow 185, has a high color development property, and is superior in light resistance. The yellow toner has toner particles containing at least a binder resin, a wax, and a colorant, wherein the yellow toner contains C.I. pigment yellow 185 and a compound represented by the general formula (1) as the colorant:

First claim

The invention claimed is:

1. A yellow toner comprising toner particles which contain at least a binder resin, a wax and a colorant,
wherein the colorant comprises C. I. pigment yellow 185 and a compound represented by the general formula (1):

wherein,
A represents —CON(R 4 )R 5 , R 4 represents a hydrogen atom or an alkyl group, and R 5 represents an alkyl group,
R 1 represents an alkyl group, an aryl group, or an amino group,
R 3 represents an alkyl group,
R 2 represents
a hydrogen atom, a cyano group, a carboxylic acid group, a carboxylate ester group, a carboxylic acid amide group, or a carbamoyl group, and
the content of the compound represented by the general formula (1) with respect to 100 parts by mass of the C.I. pigment yellow 185 is 10 to 100 parts by mass.

2. A process for producing a yellow toner comprising:
preparing a polymerizable monomer composition comprising a polymerizable monomer, C. I. pigment yellow 185, a compound represented by the general formula (1), and a wax;
dispersing the polymerizable monomer composition into an aqueous medium to form particles of the polymerizable monomer composition by granulation; and
polymerizing the polymerizable monomer in the particles using a polymerization initiator to produce toner particles,
wherein the yellow toner comprises toner particles which contain at least a binder resin, a wax and a colorant,
wherein the colorant comprises C.I. pigment yellow 185 and a compound represented by the general formula (1):

wherein,
A represents —CON(R 4 )R 5 , R 4 represents a hydrogen atom or an alkyl group, and R 5 represents an alkyl group,
R 1 represents an alkyl group, an aryl group, or an amino group,
R 3 represents an alkyl group, and
R 2 represents
a hydrogen atom, a cyano group, a carboxylic acid group, a carboxylate ester group, a carboxylic acid amide group, or a carbamoyl group.

3. A process for producing a yellow toner comprising:
preparing a solvent-containing composition by mixing a binder resin, C. I. pigment yellow 185, a compound represented by the general formula (1), and a wax in an solvent;
dispersing the solvent-containing composition into an aqueous medium to form particles of the solvent-containing composition by granulation; and
removing the solvent from the particles to produce toner particles,
wherein the yellow toner comprises toner particles which contain at least a binder resin, a wax and a colorant,
wherein the colorant comprises C.I. pigment yellow 185 and a compound represented by the general formula (1):

wherein,
A represents —CON(R 4 )R 5 , R 4 represents a hydrogen atom or an alkyl group, and R 5 represents an alkyl group,
R 1 represents an alkyl group, an aryl group, or an amino group,
R 3 represents an alkyl group, and
R 2 represents
a hydrogen atom, a cyano group, a carboxylic acid group, a carboxylate ester group, a carboxylic acid amide group, or a carbamoyl group.

Assignees

• Canon Kk

Inventors

• Mori Shosei
• Sekiguchi Takeshi
• Shintou Taichi
• Katsumoto Yuko
• Ujifusa Takayuki
• Miyazaki Takeshi

Classifications

• G03G9/08708

  Copolymers of styrene · CPC title

• G03G9/0806

  whereby chemical synthesis of at least one of the toner components takes place · CPC title

• G03G9/08755

  Polyesters · CPC title

• G03G9/091 Primary

  Azo dyes · CPC title

• G03G9/0804

  whereby the components are brought together in a liquid dispersing medium · CPC title