Toner

Patent metadata

Field	Value
Publication number	US-9341970-B2
Application number	US-201414446290-A
Country	US
Kind code	B2
Filing date	Jul 29, 2014
Priority date	Aug 1, 2013
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

The toner includes a resin component containing a crystalline polyester resin and a polyester-type resin that has a long-chain monomer bonded by condensation at a terminal, the toner having, in a total heat flow measured by a temperature-modulated differential scanning calorimeter, an endothermic peak resulting from the crystalline polyester resin in a specific temperature range, and the percentage of the endothermic quantity of the endothermic peak in a reversing heat flow with respect to the endothermic quantity of the endothermic peak in the total heat flow being at least 20.0%.

First claim

What is claimed is:

1. A toner comprising:
a toner particle that contains at least a resin component,
the resin component containing;
a first resin as a major component, and a second resin,
wherein;
the first resin is a polyester-type resin,
the polyester-type resin has;
a terminal end at which an aliphatic compound has been condensed, and
the aliphatic compound being selected from the group consisting of:
an aliphatic monocarboxylic acid having a peak value of the number of carbon atom in the range from 25 to 102, and
an aliphatic monoalcohol having a peak value of the number of carbon atom in the range from 25 to 102, and
the content of a long-chain aliphatic hydrocarbon group that originates with the aliphatic compound is from at least 0.1 mass % to not more than 20.0 mass % in the polyester-type resin,
and wherein:
the second resin is a crystalline polyester resin, and
in a total heat flow of the toner obtained by measuring the toner with a temperature-modulated differential scanning calorimeter,
the toner has
an endothermic peak resulting from the crystalline polyester resin in the temperature range from at least 50.0° C. to not more than 100.0° C., and
the percentage of an endothermic quantity of the endothermic peak in a reversing heat flow with respect to an endothermic quantity of the endothermic peak in the total heat flow being at least 20.0%.

2. The toner according to claim 1 ,
wherein
the endothermic quantity of the endothermic peak in the total heat flow is from at least 0.10 J/g to less than 4.00 J/g.

3. The toner according to claim 1 ,
wherein
the polyester-type resin is a hybrid resin in which a polyester segment and a vinylic polymer segment are chemically bonded.

4. The toner according to claim 3 ,
wherein
the mass ratio between the polyester segment and the vinylic polymer segment in the hybrid resin is from 50:50 to 90:10.

5. The toner according to claim 1 ,
wherein
the toner particle is a toner particle obtained through at least a melt kneading step and a pulverization step.

6. The toner according to claim 1 ,
wherein,
the crystalline polyester resin has a peak temperature of an endothermic peak of from at least 50.0° C. to not more than 100.0° C., in the total heat flow measured by the temperature-modulated differential scanning calorimeter.

7. The toner according to claim 1 , wherein the content of the long-chain aliphatic hydrocarbon group that originates with the aliphatic compound is from at least 1.0 mass % to not more than 15.0 mass % in the polyester-type resin.

8. The toner according to claim 1 , wherein the content of the long-chain aliphatic hydrocarbon group that originates with the aliphatic compound is from at least 2.0 mass % to not more than 10.0 mass % in the polyester-type resin.

9. A toner comprising:
a toner particle that contains at least a resin component,
the resin component containing;
a first resin as a major component, and a second resin,
wherein;
the first resin is a polyester-type resin,
the polyester-type resin has;
a terminal end at which an aliphatic compound has been condensed,
and
the aliphatic compound being selected from the group consisting of:
an aliphatic monocarboxylic acid having a peak value of the number of carbon atom in the range from 25 to 102, and
an aliphatic monoalcohol having a peak value of the number of carbon atom in the range from 25 to 102,
wherein
the polyester-type resin is a hybrid resin in which a polyester segment and a vinylic polymer segment are chemically bonded,
and wherein:
the second resin is a crystalline polyester resin, and
in a total heat flow of the toner obtained by measuring the toner with a temperature-modulated differential scanning calorimeter,
the toner has
an endothermic peak resulting from the crystalline polyester resin in the temperature range from at least 50.0° C. to not more than 100.0° C., and
the percentage of an endothermic quantity of the endothermic peak in a reversing heat flow with respect to an endothermic quantity of the endothermic peak in the total heat flow being at least 20.0%.

10. The toner according to claim 9 ,
wherein
the mass ratio between the polyester segment and the vinylic polymer segment in the hybrid resin is from 50:50 to 90:10.

Assignees

• Canon Kk

Inventors

• Yoshiba Daisuke
• Yamazaki Katsuhisa
• Nishikawa Koji
• Nomura Shotaro
• Akiyama Hiroki
• Fujimoto Masami

Classifications

• G03G9/0808

  by dry mixing the toner components in solid or softened state · CPC title

• G03G9/08788

  Block polymers · CPC title

• G03G9/08755 Primary

  Polyesters · CPC title

• G03G9/0821

  characterised by physical parameters (magnetic parameters G03G9/083) · CPC title

• G03G9/08791

  characterised by the presence of specified groups or side chains · CPC title