Actinic-ray-curable coating composition, cured coating film, coated article, and method for forming coating film

An active energy ray-curable coating composition, comprising the following components (A), (B), (C), and (D):

• (A) urethane (meth)acrylate having a polycarbonate skeleton and three or more polymerizable unsaturated groups in one molecule and having a weight average molecular weight in a range of 10,000 to 40,000;
• (B) urethane (meth)acrylate having a weight average molecular weight in a range of 1,000 or more and less than 10,000;
• (C) at least one compound selected from the group consisting of:
• a polymerizable unsaturated compound (c1) having three or more polymerizable unsaturated groups in one molecule and having a weight average molecular weight in a range of 280 or more and less than 1,000;
• a polymerizable unsaturated compound (c2) having an alicyclic structure and one or two polymerizable unsaturated groups in one molecule and having a weight average molecular weight in a range of 200 or more and less than 1,000;
• and a (meth)acrylamide compound (c3) having a weight average molecular weight in a range of 110 or more and less than 1,000;
• and
• (D) a photopolymerization initiator,
• wherein the urethane (meth)acrylate (A) is a reaction product of polycarbonate diol (a1), a polyisocyanate compound (a2), and a polymerizable unsaturated compound (a3) having a hydroxyl group, and the polymerizable unsaturated compound (a3) contains at least a polymerizable unsaturated compound (a3′) having a hydroxyl group and two or more polymerizable unsaturated groups in one molecule.