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US 7,923,495 B2Granted
Water-based inks for ink-jet printing
AssigneeKao Corporation
InventorHiroyuki Yoshida
Life of this patent
Estimating the term…
Abstract
The present invention relates to (1) particles of a polymer for ink-jet printing which contain a colorant, wherein the polymer is in the form of a mixture containing a rosin (A) and a vinyl polymer (B); (2) a water dispersion and a water-based ink for ink-jet printing which exhibit a less unevenness of colors and a high optical density; and (3) a process for producing the water dispersion.
Claims9
Particles of a polymer for ink-jet printing which contain a colorant,
- wherein the polymer is in the form of a mixture, said polymer mixture comprising (A) a rosin ester in the form of an esterified product of a polyhydric alcohol with a polymeric rosin and/or a crosslinked product thereof (B) and a vinyl polymer,
- wherein the polyhydric alcohol is glycerol or pentaerythritol,
- wherein the polymeric rosin is a dimer or a trimer of a natural rosin or modified rosin, and
- wherein a weight ratio of the rosin esterified or crosslinked product (A) to the vinyl polymer (B) [rosin (A)/vinyl polymer (B)] is from 0.02 to 10.
1 more element
Dependencies are inferred from the claim text.