Magenta toner

• US 10,036,970 B2
• Filed: 06/02/2017
• Issued: 07/31/2018
• Est. Priority Date: 06/08/2016
• Status: Active Grant

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Kanno, Ichiro, Hashimoto, Takeshi, Komatsu, Nozomu, Hama, Masayuki, Sano, Hitoshi, Onozaki, Yuto, Matsubara, Akifumi, Kobori, Takakuni, Fujikawa, Hiroyuki, Fujisaki, Tsubasa
• Primary Examiner(s): Vajda, Peter L
• Application Number:
  US15/611,865
• Publication Number:
  US 20170357168A1
• Time in Patent Office: 424 Days
• CPC Class Codes: G03G 9/0808 by dry mixing the toner components in solid or softened state
• CPC Class Codes: G03G 9/0819 characterised by the dimensions of the particles
• CPC Class Codes: G03G 9/08711 with esters of acrylic or methacrylic acid
• CPC Class Codes: G03G 9/08755 Polyesters
• CPC Class Codes: G03G 9/08795 characterised by their chemical properties, e.g. acidity, molecular weight, sensitivity to reactants
• CPC Class Codes: G03G 9/091 Azo dyes
• CPC Class Codes: G03G 9/092 Quinacridones

Abstract

Provided is a magenta toner having a toner particle containing a binder resin, a wax and a colorant, wherein the colorant contains a specific amount of a compound (1), the colorant also contains one or more compounds selected from the group consisting of a naphthol compound, a quinacridone compound and a lake compound thereof in addition to the compound (1), and the binder resin contains a specific amount of a polyester resin.

Claims

1. A magenta toner having a toner particle containing a binder resin, a wax and a colorant, wherein

the colorant contains a compound (1) and a compound (3),

a content of the compound (1) is 0.5 to 20.0 mass parts per 100 mass parts of the binder resin,

a content of the compound (3) is 0.2 to 10.0 mass parts per 100 mass parts of the binder resin, and

the binder resin contains a polyester resin, a content ratio of the polyester resin is 50 to 100 mass % of a total of the binder resin:

2. The magenta toner according to claim 1, wherein the content of the colorant is 3.0 to 20.0 mass parts per 100 mass parts of the binder resin.

3. The magenta toner according to claim 1, wherein an acid value of the polyester resin is not more than 20 mg KOH/g.

4. The magenta toner according to claim 1, wherein the wax is a hydrocarbon wax.

5. The magenta toner according to claim 1, wherein the colorant contains a quinacridone compound.

6. The magenta toner according to claim 1, wherein the colorant contains the compound (2), a content of the compound (2) being 0.2 to 10.0 mass parts per 100 mass parts of the binder resin:

7. A magenta toner having a toner particle containing a binder resin, a wax and a colorant, wherein

the colorant contains a pigment comprising a compound (1) and a compound (3) in solid solution

a content of the compound (1) is 0.5 to 20.0 mass parts per 100 mass parts of the binder resin, and

the binder resin contains a polyester resin, a content ratio of the polyester resin is 50 to 100 mass % of a total of the binder resin:

8. A magenta toner having a toner particle containing a binder resin, a wax and a colorant, wherein

the colorant contains a pigment comprising a compound (1), a compound (2), and a compound (3) in solid solution

a content of the compound (1) is 0.5 to 20.0 mass parts per 100 mass parts of the binder resin, and

the binder resin contains a polyester resin, a content ratio of the polyester resin is 50 to 100 mass % of a total of the binder resin: