Aqueous pigmented inks for ink jet printers
AssigneeE. I. Du Pont de Nemours and Company
InventorsSheau-Hwa Ma, Howard Matrick, Arthur C. Shor, Harry J. Spinelli, Michele E. Shepard, Jerome Hochberg
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Abstract
A pigmented ink for ink jet printers which comprises an aqueous carrier medium, pigment particles dispersed in an AB or BAB block copolymer having a hydrophilic segment and a segment that links to the pigment, and an effective amount of a surfactant sufficient to decrease the drying time of the ink. The A block and the B block(s) have molecular weights of at least 300. These inks give images having good print quality, water and smear resistance, lightfastness, and storage stability.
Claims14
An aqueous ink jet ink composition comprising:
- a) an aqueous carrier medium;
- b) pigment particles stabilized by an AB or BAB block copolymer;
- and
- c) a surfactant;
- wherein said ink composition, when printed on a substrate dries at a faster rate than the same ink absent the surfactant.
Dependencies are inferred from the claim text.