Electroconductive ink compositions and electroconductive film

Abstract

A conductive ink composition contains a (meth)acrylic polymer (A) and silver particles (B). The (meth)acrylic polymer (A) has a glass transition temperature of ≤0° C., a weight average molecular weight of ≥500,000, and a hydroxyl value of more than 50 mgKOH/g. The silver particles (B) have a specific surface area of 0.5 to 3.0 m2/g, a 50% average particle diameter of 0.5 to 14.0 μm, a maximum particle diameter of ≥8 μm, and a solid content from 50 to 80% by mass. Another conductive ink composition contains a (meth)acrylic polymer (A) and carbon black (CB). The (meth)acrylic polymer (A) has a glass transition temperature of ≤0° C., a weight average molecular weight of ≥500,000, and a hydroxyl value of more than 50 mgKOH/g. The carbon black (CB) has a specific surface area of ≥50 m2/g, an aggregate diameter of ≤400 nm, and a solid content from 15 to 30% by mass.

Dependencies are inferred from the claim text.