Toner

• US 10,175,595 B2
• Filed: 11/15/2017
• Issued: 01/08/2019
• Est. Priority Date: 11/25/2016
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Onozaki, Yuto, Hashimoto, Takeshi, Kanno, Ichiro, Ikeda, Megumi, Hama, Masayuki, Komatsu, Nozomu, Matsubara, Akifumi, Sano, Hitoshi, Kobori, Takakuni, Ida, Hayato, Fujikawa, Hiroyuki
• Primary Examiner(s): Vajda, Peter L
• Application Number:
  US15/813,713
• Publication Number:
  US 20180149990A1
• Time in Patent Office: 419 Days
• CPC Class Codes: C08L 47/00 Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds; Compositions of derivatives of such polymers C08L45/00 takes precedence; of conjugated diene rubbers C08L9/00 - C08L21/00
• CPC Class Codes: C09D 109/00 Coating compositions based on homopolymers or copolymers of conjugated diene hydrocarbons
• CPC Class Codes: G03G 9/0825 characterised by their structure; characterised by non-homogenuous distribution of components microcapsular toners G03G9/093
• CPC Class Codes: G03G 9/08737 Polymers derived from conjugated dienes
• CPC Class Codes: G03G 9/09321 obtained by reactions only involving carbon-to-carbon unsaturated bonds

Abstract

Provided is a toner including a toner particle that contains a toner base particle containing a binder resin and a wax, and a coating layer containing a 1,2-polybutadiene resin at the surface of the toner base particle, wherein the coverage ratio of the toner base particle by the coating layer is at least 50%.

Claims

1. A toner comprising a toner particle, said toner particle comprising:

a toner base particle containing a binder resin and a wax; and

a coating layer containing a 1,2-polybutadiene resin at the surface of the toner base particle, wherein

the 1,2-polybutadiene resin has a 1,2-syndiotactic structure,

a percentage content of the 1,2-syndiotactic structure in the 1,2-polybutadiene resin is at least 30 mass %, and

a coverage ratio of the toner base particle by the coating layer is at least 50%.

2. The toner according to claim 1, wherein the coating layer contains the 1,2-polybutadiene resin in the amount of at least 90 mass % of the coating layer.

3. The toner according to claim 1, wherein a coverage ratio of the toner base particle by the coating layer is at least 90%.

4. The toner according to claim 1, wherein an average thickness of the coating layer is 0.1 to 1.0 μ

m.

5. The toner according to claim 1, wherein the percentage content of a monomer unit represented by Formula (1) in the 1,2-polybutadiene resin is at least 90 mass %

6. The toner according to claim 1, wherein a dielectric loss tangent of the 1,2-polybutadiene resin is 2.0 to 5.0.

7. The toner according to claim 1, wherein a melting point of the 1,2-polybutadiene resin is 70°

C. to 110°

C.