Ink, Process and Use
First Claim
Patent Images
1. A process for printing an image on a substrate comprising applying to the substrate by means of an ink jet printer an ink comprising the components:
- i) an encapsulated pigment comprising a pigment core and a cross-linked dispersant shell;
ii) a binder having a weight averaged molecular weight of at least 5,000 which is a polyurethane; and
iii) a liquid vehicle;
wherein the polyurethane binder comprises repeat units from poly(alkylene oxide), dihydroxy alkanoic acid and isophorone diisocyanate and the binder is chemically different from the dispersant in the shell.
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Accused Products
Abstract
A process for printing an image on a substrate comprising applying to the substrate by means of an ink jet printer an ink comprising the components:
- i) an encapsulated pigment comprising a pigment core and a cross-linked dispersant shell;
- ii) a binder having a weight averaged molecular weight of at least 5,000 which is or comprises a polyurethane; and
- iii) a liquid vehicle;
wherein the binder is chemically different from the dispersant in the shell. The process provides prints having good highlighter smear resistance. The inks print well and are especially stable.
20 Citations
21 Claims
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1. A process for printing an image on a substrate comprising applying to the substrate by means of an ink jet printer an ink comprising the components:
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i) an encapsulated pigment comprising a pigment core and a cross-linked dispersant shell; ii) a binder having a weight averaged molecular weight of at least 5,000 which is a polyurethane; and iii) a liquid vehicle; wherein the polyurethane binder comprises repeat units from poly(alkylene oxide), dihydroxy alkanoic acid and isophorone diisocyanate and the binder is chemically different from the dispersant in the shell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An ink comprising the components:
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i) an encapsulated pigment comprising a pigment core and a cross-linked dispersant shell; ii) a binder having a weight average molecular weight of at least 5,000 which is a polyurethane; and iii) a liquid vehicle; wherein the polyurethane binder comprises repeat units from poly(alkylene oxide), dihydroxy alkanoic acid and isophorone diisocyanate, the binder is chemically different from the dispersant in the shell and the ink has a viscosity of less than 30 mPa·
s at 25°
C. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. (canceled)
Specification