Toner and method for manufacturing toner particles
AssigneeCanon Kabushiki Kaisha
InventorsYuki Hasegawa, Yasuaki Murai, Masatake Tanaka, Takayuki Toyoda, Masashi Kawamura, Waka Hasegawa, Masashi Hirose
Life of this patent
Estimating the term…
Abstract
The present invention provides a toner that contains an azo pigment well-dispersed in a binder resin and has a satisfactory color tone. The toner contains toner particles each containing a binder resin and a colorant. Each of the toner particles contains a compound having a polyester moiety and a bisazo structure moiety. The colorant is the azo pigment.
Claims9
A toner, comprising toner particles each containing a binder resin and a colorant,
- wherein each of the toner particles contains a compound having a polyester moiety and a bisazo structure moiety represented by the following formula (1) or (2), and
- the colorant is an azo pigment:
- wherein R1 to R4 independently denote a hydrogen atom or a halogen atom,
- R5 and R6 independently denote an alkyl group having 1 to 6 carbon atoms or a phenyl group,
- R7 to R11 independently denote a hydrogen atom, a COOR12 group, or a CONR13R14 group, provided that at least one of R7 to R11 denotes the COOR12 group or the CONR13R14 group,
- R12 to R14 independently denote a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and
- L1 denotes a divalent linking group to be bonded to the polyester moiety.
A method for manufacturing toner particles, comprising:
- dispersing a polymerizable monomer composition containing a pigment composition and a polymerizable monomer in an aqueous medium, forming particles of the polymerizable monomer composition, and polymerizing the polymerizable monomer in the particles to manufacture toner particles,
- wherein the pigment composition contains an azo pigment and a compound having a polyester moiety and a bisazo structure moiety represented by the following formula (1) or (2):
- wherein R1 to R4 independently denote a hydrogen atom or a halogen atom,
- R5 and R6 independently denote an alkyl group having 1 to 6 carbon atoms or a phenyl group,
- R7 to R11 independently denote a hydrogen atom, a COOR12 group, or a CONR13R14 group, provided that at least one of R7 to R11 denotes the COOR12 group or the CONR13R14 group,
- R12 to R14 independently denote a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and
- L1 denotes a divalent linking group to be bonded to the polyester moiety.
A method for manufacturing toner particles, comprising:
- dispersing a resin solution containing a pigment composition, a binder resin, and a solvent in an aqueous medium, forming particles from the resin solution to produce a suspension, and removing the solvent from the suspension to manufacture toner particles,
- wherein the pigment composition contains an azo pigment and a compound having a polyester moiety and a bisazo structure moiety represented by the following formula (1) or (2):
- wherein R1 to R4 independently denote a hydrogen atom or a halogen atom,
- R5 and R6 independently denote an alkyl group having 1 to 6 carbon atoms or a phenyl group,
- R7 to R11 independently denote a hydrogen atom, a COOR12 group, or a CONR13R14 group, provided that at least one of R7 to R11 denotes the COOR12 group or the CONR13R14 group,
- R12 to R14 independently denote a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and
- L1 denotes a divalent linking group to be bonded to the polyester moiety.
Dependencies are inferred from the claim text.