Aqueous inkjet ink
First Claim
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1. An aqueous inkjet ink comprising an aqueous vehicle having dispersed therein:
- (a) a titanium dioxide pigment dispersed with a polymeric dispersant, and (b) a crosslinked polyurethane binder additive.
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Abstract
The present invention pertains to an aqueous inkjet ink, preferably white in color, comprising a polymerically dispersed titanium dioxide and a crosslinked polyurethane binder. The invention also pertains to an ink set with an aqueous white ink as one of its inks. The invention also pertains to a method of inkjet printing with the ink and ink set. The use of the dispersed titanium dioxide and crosslinked polyurethane binder described herein results in inkjet inks having adequate stability, and having a particular utility in printing on textiles.
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Citations
21 Claims
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1. An aqueous inkjet ink comprising an aqueous vehicle having dispersed therein:
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(a) a titanium dioxide pigment dispersed with a polymeric dispersant, and (b) a crosslinked polyurethane binder additive. - View Dependent Claims (2, 16, 17, 18, 19)
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3. The aqueous inkjet ink of any one or combination of the preceding claims, wherein the titanium dioxide pigment comprises a combination of a pigmentary grade and nano grade of titanium dioxide pigment.
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4. The aqueous inkjet ink of any one or combination of the preceding claims, wherein the polymeric dispersant comprises a structured polymer dispersant.
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5. The aqueous inkjet ink of any one or combination of the preceding claims, wherein the polymeric dispersant comprises at least one polymer that provides anionic stabilization to the titanium dioxide pigment.
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6. The aqueous inkjet ink of any one or combination of the preceding claims, wherein the crosslinked polyurethane of the binder additive is a dispersed polymer.
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7. The aqueous inkjet ink of any one or combination of the preceding claims, wherein the crosslinked polyurethane is stabilized in dispersion through incorporated anionic functionality.
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8. The aqueous inkjet ink of any one or combination of the preceding claims, comprising from about 70 wt % to about 97.5 wt % of the aqueous vehicle, and/or from about 1 wt % to about 25 wt % (solids) of the titanium dioxide pigment, and/or from about 1 wt % to about 15 wt % of the crosslinked polyurethane binder, based on the total weight of the ink.
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9. The aqueous inkjet ink composition of any one or combination of the preceding claims, having a surface tension in the range of from about 20 dyne/cm to about 70 dyne/cm at 25°
- C., and a viscosity is in the range of from about 1 cP to about 30 cP at 25°
C.
- C., and a viscosity is in the range of from about 1 cP to about 30 cP at 25°
- 10. The aqueous inkjet ink of any or combination of the preceding claims, which is white in color.
Specification