Patent ID: 8044115
Filing Date: 2011-10-25
Classification: C08K,C09D

Abstract:
1. An inkjet ink composition comprising: (a) water; (b) pigment particles dispersed with a polymeric dispersant; (c) at least one water-dispersible polyurethane; (d) at least one pyrrolidinone compound; (e) glycerol; and (f) a 1,2-alkanediol having from four to eight carbon atoms; wherein the at least one pvrrolidinone compound is present in the ink at from about 2% to about 8% by weight based on the total components in the ink, glycerol is present at from about 1% to about 10% by weight based on the total components of the ink, the 1,2-alkanediol having from four to eight carbon atoms is present at from about 1 to about 5% by weight based on the total components of the ink, and the at least one pyrrolidinone compound is present at levels greater than about 30% by weight based on the sum total of the at least one pyrrolidinone compound and glycerol.