Patent ID: 7968011

Claim:
A conductive ink comprising: (a) 10 to 75 wt % of at least one solvent comprising ≦20 wt % water, wherein the at least one solvent (a) comprises ≧75 wt % a solvent having an evaporation rate ≧1.0; (b) 0 to 50 wt % of at least one radiation curable material having a Mn in the range of from 50 to 10,000 g/mol; (c) 5 to 70 wt % of at least one polyurethane: (i) having a Mw in the range of from 4,000 to 70,000 g/mol; (ii) having 0 to 5 wt % or isocyanate-reactive component(s) bearing ionic or potentially ionic water-dispersing groups; (iii) having a free isocyanate group content <0.5 wt %; (d) 20 to 85 wt % of a conductive material and wherein (a), (b), (c) and (d) add up to 100%, and the conductive ink having a resolubility within 30 seconds.