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US 9,298,118 B2Granted
Azo compound, pigment dispersant containing the azo compound, pigment composition, pigment dispersion and toner
AssigneeCanon Kabushiki Kaisha
InventorsMasashi Kawamura, Yasuaki Murai, Waka Hasegawa, Yuki Hasegawa, Takayuki Toyoda, Taiki Watanabe, Masanori Seki, Chiaki Nishiura, Ayano Mashida, Masashi Hirose
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Abstract
An object of the present invention is to provide an azo compound capable of improving the dispersibility of an azo pigment in a non-water-soluble solvent. The object of the present invention is achieved with an azo compound wherein a coloring matter moiety having a diketone azo structure and a polymer are bonded to each other.
Claims13
An azo compound having a structure, of which a polymer having a monomer unit represented by formula (2) is bound to a structure represented by formula (1):
- wherein, in the formula (1), R1 and R2 each represent an OM group or an amino group, and M represents a hydrogen atom or a counter-cation;
- and R3 to R7 each represent a hydrogen atom or a linking group to be bound to the polymer, and at least one of R3 to R7 is the linking group;
- wherein, in the formula (2), R8 represents a hydrogen atom or an alkyl group, and R9 represents a phenyl group, a carboxyl group, a carboxylic acid ester group or a carboxylic acid amide group.
Dependencies are inferred from the claim text.