Patent ID: 9668343
Date: 2017-05-30
CPC Classifications: C09D,H01B,H05K

Claim:
1. A photocurable electroconductive ink composition comprising: (A) an oligomer of urethane acrylates, (B) three types of acrylates comprising (a) at least one monofunctional acrylate, (b) at least one difunctional acrylate, and (c) at least one trifunctional acrylate and/or at least one tetrafunctional acrylate, (C) an electroconductive filler, (D) two or more types of photopolymerization initiators selected from 1-hydroxycyclohexyl phenyl ketone, bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide, 2-methyl-1-(4-methylthiophenyl)-2-morpholinopropan-1-one, benzophenone and 2,4-diethylthioxanthone, and (E) a polymeric dispersing agent having a main chain skeleton which is a polyether skeleton, a polyurethane skeleton, a polyacrylate skeleton, a polyester skeleton, a polyamide skeleton, polyimide skeleton, or polyurea skeleton, wherein the amount of acrylates (B) is from 10 to 16% by mass, based on the total mass of photocurable electroconductive ink composition, the amount of the electroconductive filler (C) to be mixed is from 77 to 85% by mass based on the total mass of the photocurable electroconductive ink composition, and 80% by mass or more of the electroconductive filler (C) is a scaly, foil-like or flakey silver powder having a particle size corresponding to a particle size distribution at 50% of more than 5 μm.