Yellow toner and method for producing the same

Patent metadata

Field	Value
Publication number	US-9910375-B2
Application number	US-201615163546-A
Country	US
Kind code	B2
Filing date	May 24, 2016
Priority date	May 27, 2015
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

A yellow toner is provided. The yellow toner includes toner particles containing a binder resin and a colorant containing at least one compound selected the group consisting of compounds given by the following formulae (1), (2), and (3) for used in a recording method such as an electrophotographic method, an electrostatic recording method, a magnetic recording method, or a toner jet method, and to a method for producing the toner:

wherein in the formulae (1), (2), and (3) the R groups are as set forth in the specification.

First claim

What is claimed is:

1. A yellow toner comprising a toner particle containing:
a binder resin; and
a colorant containing at least one compound selected from the group consisting of a compound expressed by the following formula (1), a compound expressed by the following formula (2), and a compound expressed by the following formula (3):

wherein in formulas (1) to (3), R 1 , R 11 , R 12 , and R 21 each represent an alkyl group having a carbon number of 3 or more,
R 3 , R 13 , and R 23 each represent an alkyl group, and
R 4 , R 14 , and R 24 each represent a linear alkyl group having a carbon number of 3 or more, and
wherein the colorant further contains a pigment selected from the group consisting of C.I. Pigment Yellows 180, 155, 150, and 74.

2. The yellow toner according to claim 1 , wherein R 1 , R 11 , R 12 , and R 21 are each an alkyl group having a carbon number in the range of 3 to 8.

3. The yellow toner according to claim 1 , wherein R 4 , R 14 , and R 24 are each a linear alkyl group having a carbon number in the range of 3 to 8.

4. The yellow toner according to claim 1 , wherein R 1 , R 11 , R 12 , and R 21 are each an n-octyl group or an ethylhexyl group.

5. The yellow toner according to claim 1 , wherein R 3 , R 13 , and R 23 are each an alkyl group having a carbon number in the range of 1 to 8.

6. The yellow toner according to claim 1 , wherein the compound expressed by formula (1), the compound expressed by formula (2), and the compounds expressed by formula (3) are any one of a compound expressed by the following formulas (1-26), (1-30), (1-38), (1-39), (1-41), (1-47), (1-50), (2-26), (2-27), (2-30), (2-38), (2-39), (2-40), (2-42), (2-49), (2-50), (2-51), (2-52), (2-53), (3-42), (3-43), (3-44), (3-45), (3-46), (3-52), and (3-54):

7. The yellow toner according to claim 1 , wherein the toner particle further contains a wax.

8. A method for producing the yellow toner according to claim 1 , the method comprising one of the following processes (i) and (ii):
(i) preparing a suspension by dispersing in an aqueous medium a polymerizable monomer composition containing the colorant and a polymerizable monomer capable of producing the binder resin, and polymerizing the polymerizable monomer to form the toner particle; and
(ii) suspending a solution containing the colorant and the binder resin in an aqueous medium to prepare a suspension, and granulating the suspension to form the toner particle.

9. A method for producing the yellow toner according to claim 1 , the method comprising:
mixing a dispersion liquid prepared by emulsifying the binder resin for dispersion and a dispersion liquid of the colorant; and
forming the toner particle by aggregation and heat fusing.

10. A method for producing the yellow toner according to claim 1 , the method comprising:
kneading a resin composition containing the binder resin and the colorant, and;
pulverizing the resin composition to form the toner particle.

Assignees

• Canon Kk

Inventors

• Sekiguchi Takeshi
• Mori Shosei

Classifications

• G03G9/0806

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

• G03G9/0924

  Dyes characterised by specific substituents · CPC title

• G03G9/091 Primary

  Azo dyes · CPC title

• G03G15/08

  using a solid developer, e.g. powder developer · CPC title