Smear resistant inkjet inks
First Claim
1. An aqueous ink jet ink composition, comprising from about 1% to about 20% by weight self dispersed pigment, and from about 1% to about 10% by weight of a polyurethane dispersion wherein the polyurethane dispersion has a glass transition temperature Tg greater than −
- 30°
C. to less than 35°
C. and has at least one of the following thermal propertiesa. loss modulus E″
of 1.7 to 5 ×
108 pascals,b. peak tan delta is 0.23 to 0.65,wherein the glass transition temperature Tg, peak tan delta and the loss modulus are measured by dynamic mechanical analysis on a film prepared from the polyurethane dispersion.
2 Assignments
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Accused Products
Abstract
Inkjet inks are provided, relating 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 Tg greater than −30 ° C. to less than about 35 ° C. and have at least one of the following thermal properties: loss modulus E″ of 1.7 to 5×108 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.
28 Citations
20 Claims
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1. An aqueous ink jet ink composition, comprising from about 1% to about 20% by weight self dispersed pigment, and from about 1% to about 10% by weight of a polyurethane dispersion wherein the polyurethane dispersion has a glass transition temperature Tg greater than −
- 30°
C. to less than 35°
C. and has at least one of the following thermal propertiesa. loss modulus E″
of 1.7 to 5 ×
108 pascals,b. peak tan delta is 0.23 to 0.65, wherein the glass transition temperature Tg, peak tan delta and the loss modulus are measured by dynamic mechanical analysis on a film prepared from the polyurethane dispersion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 20)
- 30°
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15. A process for inkjet printing comprising the step of jetting an ink onto a substrate, wherein the ink is an aqueous inkjet ink comprising from about 1% to about 20% by weight self dispersed pigment, and from about 1% to about 10% by weight of a polyurethane dispersion wherein the polyurethane dispersion has a glass transition temperature Tg greater than −
- 30°
C. to less than 35°
C. and has at least one of the following thermal propertiesa. loss modulus E″
of 1.7 to 5×
108 pascals,b. peak tan delta is 0.23 to 0.65, wherein the glass transition temperature Tg, peak tan delta and the loss modulus are measured by dynamic mechanical analysis on a film prepared from the polyurethane dispersion. - View Dependent Claims (16, 17, 18, 19)
- 30°
Specification