Patent ID: 8940821
Filing Date: 2015-01-27
Classification: C08G,C09D

Abstract:
1. An inkjet ink composition comprising: (A) water; and (B) at least one water-dispersible polyurethane/urea polymer having at least a first soft segment formed from a polyol prepolymer and at least a second soft segment formed from a polyamine prepolymer, wherein the polyol prepolymer forms urethane bonds in the polyurethane/urea and the polyamine prepolymer forms urea bonds in the polyurethane/urea, and further wherein at least about 4%by weight of the combined soft segments is formed by polyamine prepolymers that form urea bonds in the polyurethane/urea polymer, and (C) a pigment; wherein the first and second soft segments are formed from prepolymers having ester, carbonate, or ether linkages and having molecular weights above about 300 and below about 3000, the polyurethane/urea polymer has an acid number between 50 and 150 , and the viscositly of the ink is less than 3.0 centipoise at 25 degrees Celsius.