Patent ID: 7789955
Filing Date: 2010-09-07
Classification: C09D

Abstract:
1. An aqueous ink jet ink composition comprising: (a) a pigment dispersion containing from about 10 to about 30 parts of pigment; (b) an aqueous carrier medium containing from about 27.35 to about 86.48 parts of water; (c) from about 0.5 to about 30 parts of an n-ethyl pyrrolidone cosolvent combination having a solubility in water of at least about 0.5% at 25° C.; (d) from about 2 to 10 parts ethanol: (e) from about 0.5 to about 1 part of an aliphatic tertiary amine: (f) from about 0.01 to about 0.05 parts of isothiazolinone; (g) from about 0.01 to about 0.1 parts of fluorosurfactant; (h) from about 0.5 to about 1.5 parts of nonionic surfactant; and (i) wherein the ink composition is permanently adherent to nonporous substrates and is free of resins and polymers, and wherein all parts are by weight and wherein the sum of components (a)+(b)+(c)+(d)+(e)+(f)+(g)+(h) equals 100.