Toner

Patent metadata

Field	Value
Publication number	US-9285697-B2
Application number	US-201414446971-A
Country	US
Kind code	B2
Filing date	Jul 30, 2014
Priority date	Aug 1, 2013
Publication date	Mar 15, 2016
Grant date	Mar 15, 2016

Abstract

Provided is a toner has toner particle containing a crystalline polyester resin A, an amorphous resin B and a colorant, wherein (1) the crystalline polyester resin A is a resin that has a crystal nucleating agent segment (D) on the end of a polyester molecular chain (C), (2) the amorphous resin (B) is a hybrid resin in which a polyester unit (E) and a vinyl polymer unit (F) are chemically bonded, and (3) the SP value of the polyester molecular chain (C) (Sc), the SP value of the crystal nucleating agent segment (D) (Sd), the SP value of the polyester unit (E) (Se) and the SP value of the vinyl polymer unit (F) (Sf) satisfy specific relationships.

First claim

What is claimed is:

1. A toner having toner particle containing a crystalline polyester resin A, an amorphous resin B and a colorant, wherein
(1) the crystalline polyester resin A is a resin that has a crystal nucleating agent segment (D) on the end of a polyester molecular chain (C),
(2) the amorphous resin (B) is a hybrid resin in which a polyester unit (E) and a vinyl polymer unit (F) are chemically bonded, and
(3) when the SP value of the polyester molecular chain (C) is defined as Sc ((cal/cm 3 ) 1/2 ), the SP value of the crystal nucleating agent segment (D) is defined as Sd ((cal/cm 3 ) 1/2 ), the SP value of the polyester unit (E) is defined as Se ((cal/cm 3 ) 1/2 ), and the SP value of the vinyl polymer unit (F) is defined as Sf ((cal/cm 3 ) 1/2 ), then the Sc, the Sd, the Se and the Sf satisfy the following expressions 1 to 3.
| Sd−Sf|<|Sd−Se|   (Expression 1)

| Sd−Sf|≦ 1.00  (Expression 2)

| Sc−Se|<|Sc−Sf|   (Expression 3).

2. The toner according to claim 1 , wherein the crystal nucleating agent segment (D) is a segment derived from one of an aliphatic monoalcohol having 10 to 30 carbon atoms and an aliphatic monocarboxylic acid having 11 to 31 carbon atoms.

3. The toner according to claim 1 , wherein the Sc and the Se satisfy the following Expression 4
| Sc−Se|≦ 1.50  (Expression 4).

4. The toner according to claim 1 , wherein the Sf satisfies the following Expression 5
Sf≦9.00  (Expression 5).

5. The toner according to claim 1 , wherein the mass ratio of the crystalline polyester resin A and the amorphous resin B in the toner particle is such that the ratio of crystalline polyester resin A: amorphous resin B is 5:95 to 40:60.

6. The toner according to claim 1 , wherein the mass ratio of the polyester unit (E) and the vinyl polymer unit (F) in the amorphous resin B is such that the ratio of polyester unit (E): vinyl polymer unit (F) is 55:45 to 95:5.

7. The toner according to claim 1 , wherein the content of the crystal nucleating agent segment (D) with respect to all monomer-derived units composing the crystalline polyester resin A is from 0.10 mol % to 7.00 mol %.

8. The toner according to claim 1 , wherein |Se−Sf| is 0.40 or more.

Assignees

• Canon Kk

Inventors

• Fukudome Kosuke
• Moribe Shuhei
• Okamoto Naoki
• Nakamura Kunihiko
• Umeda Noriyoshi
• Shiotari Yoshiaki
• Mita Satoshi
• Ida Tetsuya

Classifications

• G03G9/08755 Primary

  Polyesters · CPC title

• G03G9/08795

  characterised by their chemical properties, e.g. acidity, molecular weight, sensitivity to reactants · CPC title

• G03G9/08797

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

• G03G9/08788

  Block polymers · CPC title