| abstract |
This invention pertains to inkjet inks, in particular to smear resistant inkjet inks, and even more particularly to smear resistant pigmented aqueous inkjet inks comprising polyurethane dispersions and self-dispersing pigments. The polyurethane dispersions have a glass transition temperature T?g#191 greater than -30C to less than about 35C and has at least one of the following thermal properties loss modulus E" of 1.7 to 5 x 10 6 pascals, and/or a peak tan delta is 0.23 to 0.65, where the glass transition temperature, peak tan delta and the loss modulus are measured by dynamic mechanical analysis on a film prepared from the polyurethane dispersion. |