Inkjet inks having sustained decap
AssigneeHewlett-Packard Development Company, L.P.
InventorKeshava A. Prasad
Life of this patent
Estimating the term…
Abstract
The present disclosure provides sustained decap for inkjet inks and related methods. As such, an inkjet ink composition can comprise a linear polyurethane binder having a weight average molecular weight of less than 50,000 Mw; from 5 wt % to 20 wt % of an organic cosolvent system including a first organic cosolvent selected from the group of 2-hydroxyethylurea, 1,2,6-hexanetriol, di-(2-hydoxyethyl)-5,5-dimethylhydantoin, 1,1,1,-tris(hydroxymethyl)ethane, 1,2,4-butanetriol, and mixtures thereof; water; and a colorant. Additionally, the organic cosolvent system can also comprise less than 5 wt % total organic cosolvent having a boiling point less than 250° C. based on the weight of the inkjet ink composition.
Claims15
An inkjet ink composition having sustained decap, comprising:
- a linear polyurethane binder having a weight average molecular weight of less than 50,000 Mw;
- from 5 wt % to 20 wt % of an organic cosolvent system including a first organic cosolvent selected from the group of 2-hydroxyethylurea, 1,2,6-hexanetriol, di-(2-hydoxyethyl)-5,5-dimethylhydantoin, 1,1,1,-tris(hydroxymethyl)ethane, 1,2,4-butanetriol, and mixtures thereof, wherein the organic cosolvent system also comprises less than 5 wt % total organic cosolvent having a boiling point less than 250° C. based on the weight of the inkjet ink composition;
- water;
- and
- a colorant.
A method for manufacturing an inkjet ink composition having sustained decap, comprising:
- combining an organic cosolvent system with a linear polyurethane binder having a weight average molecular weight less than 50,000 Mw to form a mixture, the organic cosolvent system including a first organic cosolvent selected from the group of 2-hydroxyethylurea, 1,2,6-hexanetriol, di-(2-hydoxyethyl)-5,5-dimethylhydantoin, 1,1,1,-tris(hydroxymethyl)ethane, 1,2,4-butanetriol, and mixtures thereof;
- and
- adding a colorant and water to the mixture thereby forming the inkjet ink composition,
- wherein the organic cosolvent system is present in the inkjet ink composition at from 5 wt % to 20 wt %, and wherein the organic cosolvent system also comprises less than 5 wt % total organic cosolvent having a boiling point less than 250° C. based on the weight of the inkjet ink composition.
A printing system, comprising:
- a page-wide array print head;
- and
- an inkjet ink composition having sustained decap and adapted for use with the page-wide array printhead, the inkjet ink composition, comprising:
- a linear polyurethane binder having a weight average molecular weight of less than 50,000 Mw;
- from 5 wt % to 20 wt % of an organic cosolvent system including a first organic cosolvent selected from the group of 2-hydroxyethylurea, 1,2,6-hexanetriol, di-(2-hydoxyethyl)-5,5-dimethylhydantoin, 1,1,1,-tris(hydroxymethyl)ethane, 1,2,4-butanetriol, and mixtures thereof, wherein the organic cosolvent system also comprises less than 5 wt % total organic cosolvent having a boiling point less than 250° C. based on the weight of the inkjet ink composition;
- water;
- and
- a colorant.
Dependencies are inferred from the claim text.