Electrostatic image developing toner

Patent metadata

Field	Value
Publication number	US-9703219-B1
Application number	US-201615274417-A
Country	US
Kind code	B1
Filing date	Sep 23, 2016
Priority date	Jun 1, 2016
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

Provided is an electrostatic image developing toner containing toner particles having a domain-matrix structure formed with a matrix of an amorphous polyester resin and a domain of a crystalline resin, wherein the toner particles contain an releasing agent and alkoxy aniline; and a content of the alkoxy aniline contained in the toner particles is in the range of 0.1 to 15.0 mass ppm.

First claim

What is claimed is:

1. An electrostatic image developing toner containing toner particles having a domain-matrix structure formed with a matrix of an amorphous polyester resin and a domain of a crystalline resin,
wherein the toner particles contain an releasing agent and alkoxy aniline; and
a content of the alkoxy aniline contained in the toner particles is in the range of 0.1 to 15.0 mass ppm.

2. The electrostatic image developing toner described in claim 1 , wherein the releasing agent has a melting point in the range of 60 to 90° C.

3. The electrostatic image developing toner described in claim 1 , wherein the toner particles contain C. I. Pigment Yellow 74 as a pigment.

4. The electrostatic image developing toner described in claim 3 , wherein the toner particles contain at least one pigment selected from the group consisting of: C. I. Pigment Yellow 93, C. I. Pigment Yellow 155, C. I. Pigment Yellow 180, C. I. Pigment Yellow 185, C. I. Solvent Yellow 93, and C. I. Solvent Yellow 163.

5. The electrostatic image developing toner described in claim 1 , wherein the crystalline resin in the toner particles is a crystalline polyester resin.

6. The electrostatic image developing toner described in claim 5 , wherein a content of the crystalline polyester resin in the toner particles is in the range of 5 to 30 mass %.

7. The electrostatic image developing toner described in claim 5 , wherein the crystalline polyester resin is a hybrid resin bonded with an amorphous resin segment.

8. The electrostatic image developing toner described in claim 5 , wherein the crystalline polyester resin has an acid value in the range of 15 to 30 mg KOH/g.

9. The electrostatic image developing toner described in claim 1 , wherein the alkoxy aniline is 2-methoxyaniline.

10. The electrostatic image developing toner described in claim 5 ,
wherein the amorphous polyester resin has a high molecular weight component and a low molecular weight component;
the high molecular weight component has a weight average molecular weight (Mw) in the range of 30,000 to 300,000; and
the low molecular weight component has a weight average molecular weight (Mw) in the range of 8,000 to 25,000.

11. The electrostatic image developing toner described in claim 10 , wherein the high molecular weight component in the amorphous polyester resin has an acid value smaller than the acid value of the crystalline polyester resin.

Assignees

• Konica Minolta Inc

Inventors

• Matsubara Masaharu
• Kayamori Takanari
• Tonegawa Naoya
• Sekiguchi Kouji
• Iloka Atsushi

Classifications

• G03G9/08755 Primary

  Polyesters · CPC title

• G03G9/0825

  characterised by their structure; characterised by non-homogenuous distribution of components (microcapsular toners G03G9/093) · CPC title

• G03G9/091

  Azo dyes · CPC title

• G03G9/08797

  characterised by their physical properties, e.g. viscosity, solubility, melting temperature, softening temperature, glass transition temperature · CPC title

• G03G9/09733 Primary

  Organic compounds (G03G9/08782 takes precedence) · CPC title