Patent ID: 6225370
Filing Date: 2001-05-01
Classification: C08G,C09D

Abstract:
An ink composition, comprising a colorant and an additive selected from the group consisting of:(a) dispersants synthesized from an aromatic mercaptan, a hydrophilic monomer, a hydrophobic polymeric reactant having a siloxyl substituent, and a stabilizing reactant, wherein the molar ratio of hydrophilic monomer:hydrophobic polymeric reactant:stabilizing reactant:aromatic mercaptan is from about 5:1:1:1 to about 100:1:10:2;(b) humectant mixtures comprising a bis-hydroxy terminated thioether, a lactam, and a compound selected from the group consisting of polyalkylene glycols, polyol/alkylene oxide condensates and mixtures thereof; wherein the ink composition comprises from about 6% to about 65%, by weight, total humectant, from about 2% to about 25%, by weight, bis-hydroxy terminated thioether and from about 2% to about 25%, by weight, lactam; and(c) mixtures thereof.