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US 2012/0256984 A1Published application
Ink jet ink, ink cartridge, and ink jet recording method
AssigneeCanon Kabushiki Kaisha
InventorsDaiji Okamura, Kousuke Yamasaki, Mitsuru Ishii, Yuuki Nishino, Yoichi Takada, Hirofumi Ichinose, Hiroshi Tomioka
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Abstract
An ink jet ink contains a self-dispersing pigment and a polyurethane polymer. The polyurethane polymer has units derived from a polyisocyanate, a polyol having no acid group, and a diol having an acid group. The polyurethane polymer has a cross-linked structure and an acid value of the polyurethane polymer is 60 mgKOH/g or more and 100 mgKOH/g or less.
Claims10
An ink jet ink comprising:
- a self-dispersing pigment and a polyurethane polymer,
- wherein the polyurethane polymer has units derived from a polyisocyanate, a polyol having no acid group, and a diol having an acid group, has a cross-linked structure, and an acid value of the polyurethane polymer is 60 mgKOH/g or more and 100 mgKOH/g or less.
Dependencies are inferred from the claim text.