Toner and two-component developer

• US 9,665,023 B2
• Filed: 12/10/2014
• Issued: 05/30/2017
• Est. Priority Date: 12/20/2013
• Status: Active Grant

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Kawakami, Hiroaki, Kamae, Kentaro, Matsuo, Ryuichiro, Ishigami, Koh, Miura, Masaharu, Hama, Masayuki
• Primary Examiner(s): Rodee, Christopher
• Application Number:
  US14/566,083
• Publication Number:
  US 20150177634A1
• Time in Patent Office: 902 Days
• Field of Search: 4301094
• CPC Class Codes: G03G 9/08748 Phenoplasts
• CPC Class Codes: G03G 9/08755 Polyesters
• CPC Class Codes: G03G 9/08793 Crosslinked polymers
• 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 9/1075 Structural characteristics of the carrier particles, e.g. shape or crystallographic structure

Abstract

Provided is a toner, including toner particles each containing a binder resin containing a polyester α as a main component, a colorant, a wax, and a crystalline polyester, in which: the polyester α has a polyhydric alcohol unit and a polyvalent carboxylic acid unit; and the polyester α has, as the polyhydric alcohol unit, a polyhydric alcohol unit N derived from an alkylene oxide adduct of a novolac type phenol resin.

Claims

1. A toner comprising toner particles each comprising:

a binder resin containing a polyester α

as a main component thereof, said polyester α

comprising a polyvalent carboxylic acid unit and a polyhydric alcohol unit comprising a polyhydric alcohol unit N derived from an alkylene oxide adduct of a novolac type phenol resin;

a colorant;

a wax; and

a crystalline polyester obtained by subjecting a monomer composition to a condensation polymerization reaction, the monomer composition comprising (i) a monovalent carboxylic acid monomer, (ii) an aliphatic diol having 2 to 22 carbon atoms, and (iii) an aliphatic dicarboxylic acid having 2 to 22 carbon atoms, wherein

the polyester α

comprises 0.1 to 3.0 mol % of the polyhydric alcohol unit N with respect to a total number of moles of the polyhydric alcohol unit.

2. The toner according to claim 1, wherein the polyhydric alcohol unit N comprises a polyhydric alcohol unit derived from a polyhydric alcohol represented by the following formula (N):

3. The toner according to claim 1, wherein the polyester α

comprises, as the polyvalent carboxylic acid unit, a polyvalent carboxylic acid unit F derived from an aliphatic dicarboxylic acid containing a straight-chain hydrocarbon having 4 to 16 carbon atoms as a main chain, the aliphatic dicarboxylic acid having carboxy groups bonded to both terminals of the main chain.

4. The toner according to claim 3, wherein the polyester α

comprises 5.0 to 15.0 mol % of the polyvalent carboxylic acid unit F with respect to a total number of moles of the polyvalent carboxylic acid unit.

5. A two-component developer comprising:

the toner according to claim 1; and

a magnetic carrier.

6. The two-component developer according to claim 5, wherein a content of the toner in the two-component developer is from 2 to 15 mass % with respect to a total mass of the two-component developer.