Toner and method of producing toner

Patent metadata

Field	Value
Publication number	US-9904193-B2
Application number	US-201615198858-A
Country	US
Kind code	B2
Filing date	Jun 30, 2016
Priority date	Aug 28, 2015
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

Provided is a toner, including a toner particle containing: a binder resin containing a styrene acrylic resin as a main component, a colorant, a hydrocarbon wax, and a wax dispersant, in which: the wax dispersant includes a polymer of a vinyl resin component and a hydrocarbon compound, the vinyl resin component including styrene and one or more kinds of vinyl-based polymerizable monomers except a styrene derivative; and a solubility parameter of the binder resin (A) a solubility parameter of the vinyl resin segment of the wax dispersant (C), and a solubility parameter of the hydrocarbon compound segment of the wax dispersant (D) satisfy the formulae (1) and (2).

| A−C |≦0.20  (1)

C−D <1.65  (2)

First claim

What is claimed is:

1. A toner, comprising a toner particle containing:
a binder resin containing a styrene acrylic resin as a main component;
a colorant;
a hydrocarbon wax; and
a wax dispersant comprising a vinyl resin segment and a hydrocarbon compound segment, the vinyl resin segment being a styrene-n-butyl acrylate bipolymer, wherein
the binder resin and the wax dispersant satisfy formulae (1) and (2):
| A−C|≦ 0.20  (1)

C−D< 1.65  (2)

where “A” represents a solubility parameter of the binder resin, “C” represents a solubility parameter of the vinyl resin segment of the wax dispersant, and “D” represents a solubility parameter of the hydrocarbon compound segment of the wax dispersant, and
a content of the hydrocarbon compound segment of the wax dispersant is 1 to 50 mass % with respect to a total mass of the wax dispersant.

2. A toner according to claim 1 , wherein the hydrocarbon wax and the wax dispersant satisfy formula (3):
| B−D|≦ 0.30   (3)

where “B” represents a solubility parameter of the hydrocarbon wax.

3. A toner according to claim 1 , wherein the hydrocarbon compound segment of the wax dispersant is one of a polyolefin and a paraffin.

4. A toner according to claim 1 , wherein Wb/Wa≦2.0 is satisfied when Wa mass % is a content of the hydrocarbon wax in the toner particle and Wb mass % is a content of the wax dispersant therein.

5. A toner according to claim 1 , further comprising a vinyl resin segment comprising a methacrylic polymerizable monomer.

6. A method of producing the toner including the toner particle of claim 1 , the method comprising:
forming in an aqueous medium a particle of a polymerizable monomer composition containing a polymerizable monomer, the colorant, the hydrocarbon wax, and the wax dispersant; and
polymerizing the polymerizable monomer in the particle of the polymerizable monomer composition to produce the binder resin containing the styrene acrylic resin as a main component.

7. A method of producing the toner including the toner particle of claim 1 , the method comprising:
forming in an aqueous medium a particle of a resin solution obtained by dissolving or dispersing the binder resin containing the styrene acrylic resin as a main component, the colorant, the hydrocarbon wax, and the wax dispersant in an organic solvent; and
removing the organic solvent in the particle of the resin solution.

8. The toner according to claim 1 , wherein the content of the hydrocarbon compound segment of the wax dispersant is 1 to 10 mass % with respect to a total mass of the wax dispersant.

9. A toner, comprising a toner particle containing:
a binder resin containing a styrene acrylic resin as a main component;
a colorant;
a hydrocarbon wax; and
a wax dispersant comprising a vinyl resin segment and a hydrocarbon compound segment, the vinyl resin segment being a polymer of a composition comprising a styrene monomer and one or more kinds of vinyl-based polymerizable monomers except the styrene monomer, wherein
the binder resin and the wax dispersant satisfy formulae (1) and (2):
| A−C|≦ 0.20  (1)

C−D< 1.65  (2)

where “A” represents a solubility parameter of the binder resin, “C” represents a solubility parameter of the vinyl resin segment of the wax dispersant, and “D” represents a solubility parameter of the hydrocarbon compound segment of the wax dispersant,
a content of the hydrocarbon compound segment of the wax dispersant is 1 to 50 mass % with respect to a total mass of the wax dispersant,
the vinyl-based polymerizable monomers except the styrene monomer comprises an acrylonitrile, and
a content of the acrylonitrile of the composition in the vinyl resin segment is 5 mass % or less with respect to a total mass of the composition in the vinyl resin segment.

Assignees

• Canon Kk

Inventors

• Nakagawa Yoshihiro
• Tanaka Masatake
• Isono Naoya
• Takada Harumi

Classifications

• G03G9/0806

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

• G03G9/08711 Primary

  with esters of acrylic or methacrylic acid · 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

• G03G9/08782

  Waxes · CPC title