US Patent No. 9,298,118

AZO COMPOUND, PIGMENT DISPERSANT CONTAINING THE AZO COMPOUND, PIGMENT COMPOSITION, PIGMENT DISPERSION AND TONER


Patent No. 9,298,118
Issue Date March 29, 2016
Title Azo Compound, Pigment Dispersant Containing The Azo Compound, Pigment Composition, Pigment Dispersion And Toner
Inventorship Masashi Kawamura, Yokohama (JP)
Yasuaki Murai, Kawasaki (JP)
Waka Hasegawa, Tokyo (JP)
Yuki Hasegawa, Yokohama (JP)
Takayuki Toyoda, Yokohama (JP)
Taiki Watanabe, Akishima (JP)
Masanori Seki, Yokohama (JP)
Chiaki Nishiura, Kawasaki (JP)
Ayano Mashida, Kawasaki (JP)
Masashi Hirose, Machida (JP)
Assignee Canon Kabushiki Kaisha, Tokyo (JP)

Claim of US Patent No. 9,298,118

1. 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.