Patent ID: 7767011

Claim:
An ink comprising a liquid vehicle, a gelling agent, an electrolyte and optionally at least one colorant; wherein the electrolyte is a sulfonated polyester selected from the group consisting of poly(1,2-propylene-sodio 5-sulfoisophthalate), poly(neopentylene-sodio 5-sulfoisoplithalate), poly(diethylene-sodio 5-sulfoisophthalate), copoly(1,2-propylene-sodio 5-sulfoisophthalate)-copoly -(1,2-propylene-terephthalate-phthalate), copoly(1,2-propylene-diethylene-sodio 5-sulfoisophthalate) -copoly-(1,2-propylene-diethylene-terephthalate-phthalate), copoly(ethylene-neopentylene-sodio 5-sulfoisophthalate)-copoly-(ethylene-neopentylene-terephthalate-phthalate) and copoly(propoxylated bisphenol A)-copoly-(propoxylated bisphenol A-sodio 5-sulfoisophthalate), and wherein the electrolyte is a polymeric electrolyte generated by a stable free readical polymerization process, and wherein the polymeric electrolyte is bonded to a film forming polymer generated by the stable free radical polymerization process in forming a block copolymer.