TONER

• US 20170315463A1
• Filed: 04/27/2017
• Published: 11/02/2017
• Est. Priority Date: 05/02/2016
• Status: Abandoned Application

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Onozaki, Yuto, Hama, Masayuki, Hashimoto, Takeshi, Kanno, Ichiro, Sano, Hitoshi, Matsubara, Akifumi, Komatsu, Nozomu, Kobori, Takakuni, Fujikawa, Hiroyuki, Fujisaki, Tsubasa
• Application Number:
  US15/498,966
• Publication Number:
  US 20170315463A1
• Time in Patent Office: Days
• CPC Class Codes: G03G 9/0819 characterised by the dimensions of the particles
• CPC Class Codes: G03G 9/0821 characterised by physical parameters magnetic parameters G03G9/083
• 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 9/0827 characterised by their shape, e.g. degree of sphericity
• CPC Class Codes: G03G 9/08704 Polyalkenes
• CPC Class Codes: G03G 9/08755 Polyesters
• CPC Class Codes: G03G 9/08797 characterised by their physical properties, e.g. viscosity, solubility, melting temperature, softening temperature, glass transition temperature
• CPC Class Codes: G03G 9/0918 Phthalocyanine dyes
• CPC Class Codes: G03G 9/09321 obtained by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: G03G 9/09371 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: G03G 9/09378 Non-macromolecular organic compounds
• CPC Class Codes: G03G 9/09392 Preparation thereof

Abstract

By controlling the migration to the toner particle surface of the crystalline polyester present in the toner particle, a toner is provided that exhibits an excellent durability in long-term use, a stable charging performance after holding in a high-temperature, high-humidity environment, and an excellent low-temperature fixability, in which the toner having a toner particle that contains an amorphous resin, a crystalline polyester, and a wax, wherein the toner particle includes, at the surface thereof, a coat layer containing a cyclic polyolefin resin.

Claims

1. A toner comprising a toner particle containing

an amorphous resin, a crystalline polyester, and a wax,

wherein

the toner particle comprises a coat layer containing a cyclic polyolefin resin at the surface of the toner particle.

2. The toner according to claim 1, wherein

the amorphous resin contains an amorphous polyester resin.

3. The toner according to claim 1, wherein

an abundance ratio of oxygen atoms to carbon atoms according to surface analysis of the toner particle by x-ray photoelectron spectroscopy is not more than 20.0%.

4. The toner according to claim 1, wherein

the cyclic polyolefin resin is a copolymer of a cyclic olefin and at least one of ethylene and an α

-olefin, and

the cyclic olefin is a compound having a norbornene structure in the main skeleton thereof.

5. The toner according to claim 1, wherein

the crystalline polyester is a condensation polymer of an aliphatic diol having at least 6 and not more than 12 carbons and an aliphatic dicarboxylic acid having at least 6 and not more than 12 carbons.

6. The toner according to claim 1, wherein

a content of the crystalline polyester in the toner particle is at least 1.0 mass part and not more than 15.0 mass parts per 100.0 mass parts of the amorphous resin in the toner particle.