Patent ID: 9676921
Date: 2017-06-13
CPC Classifications: C08K,C09D

Claim:
1. An ink for use in an indirect printing process comprising: water; a water-miscible organic solvent, wherein the water to water-miscible organic solvent is from about 97:3 to about 40:60, further wherein the total amount of water and water-miscible organic solvent is from about 75 to about 97 percent by weight based on the total weight of the ink; a colorant having an average particle size of from about 20 to about 500 nm; and a latex comprising at least one unsaturated polyester and a photoinitiator, wherein the at least one unsaturated polyester has an acid value in the range of from 9 to 13; wherein the at least one unsaturated polyester comprises at least a first residue of a diacid or diester monomer, and a second residue of a diol monomer, the unsaturated polyester being prepared by reacting the first residue of a diacid or diester monomer and the second residue of a diol monomer; wherein the diacid monomer is selected from the group consisting of fumaric acid, maleic acid, itaconic acid, and mixtures thereof, wherein the diester monomer is selected from the group consisting of dimethyl fumarate, dimethyl itaconate, cis-1,4-diacetoxy-2-butene, diethyl fumarate, diethyl maleate, and mixtures thereof, and further the diol monomer is selected from the group consisting of propoxylated bisphenol A, butoxylated bisphenol A, ethoxylated bisphenol A, 1,2-propanediol, and mixtures thereof, wherein the ink has a surface tension of from about 15 to about 50 dynes/cm at the jetting temperature, and a viscosity of from about 2 centipoise to about 20 centipoise at the jetting temperature.