Toner including compound having bisazo skeleton
AssigneeCanon Kabushiki Kaisha
InventorsMasatake Tanaka, Masashi Hirose, Takayuki Toyoda, Waka Hasegawa, Yasuaki Murai, Masashi Kawamura, Yuki Hasegawa
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Abstract
An object of the present invention is to provide a toner having high dispersibility of an azo pigment in a binder resin and a good color tone, having suppressed image fogging and high transfer efficiency, and providing a stable image for a long time. The toner including toner base particles, each of which includes: at least a binder resin, a compound in which a specific bisazo skeleton unit bonds to a specific polymer resin unit, and an azo pigment as a colorant.
Claims10
A toner comprising toner base particles each of which includes a binder resin, a compound, and an azo pigment as a colorant, wherein
- the compound has a structure in which a unit represented by formula (1) or formula (2):
- wherein R1 to R4 represent a hydrogen atom or a halogen atom,
- R5 and R6 represent an alkyl group having 1 to 6 carbon atoms or a phenyl group,
- R7 to R11 represent a hydrogen atom, a COOR12 group, or a CONR13R14 group, at least one of R7 to R11 is a COOR12 group or a CONR13R14 group, and R12 to R14 represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and
- L1 represents a divalent linking group;
- bonds to a polymer unit having at least one of a partial structure represented by formula (3) and a partial structure represented by formula (4):
- wherein R15 represents a hydrogen atom or an alkyl group;
- wherein R16 represents a hydrogen atom or an alkyl group, and R17 represents a hydrogen atom, alkyl group, or an aralkyl group.
Dependencies are inferred from the claim text.