| 摘要 |
It is the object of the present invention to provide a pigment dispersed aqueous ink composition for ink jet printers, which gives reliable printing performance and yields printed images which have excellent print quality. The ink compositions are suitable for printing on plain paper. The ink comprises water as the principal solvent, a pigment, and a pigment dispersant. The pigment dispersant is a derivative of a polyuronic acid in which a hydrophobic polymer is covalently attached to the reducing terminus of the polyuronic acid. The polyuroric acid is composed primarily of 1,4-linked polygalacturonic acid, polyguluronic acid, polyiduronic acid, or mixed polymers thereof. |
