Patent ID: 7514479

Claim:
An active energy ray curable coating composition comprising a mixture (A) of compounds each having a (meth)acryloyl group, and a colloidal silica (B), characterized in that the mixture (A) contains from 22 to 62% of a copolymer (A1) which has a structure in which an isocyanate group of a compound (c) having the isocyanate group and a (meth)acryloyl group in its molecule is addition-reacted with hydroxyl groups of a polymer (b) obtainable by reacting a radical polymerizable monomer mixture (a) comprising a radical polymerizable monomer (a1) having a quaternary ammonium salt group, a radical polymerizable monomer (a2) having a hydroxyl group and a radical polymerizable monomer (a3) having a structure represented by the following formula 1: —(C(═O)C m H 2m O) n — Formula 1 (in the formula 1, m is an integer of from 3 to 5, and n is an integer of from 1 to 10), wherein the monomer (a1) is in a proportion of from 20 to 45 parts by mass per 100 parts by mass of the total amount of the monomer mixture (a) and the compound (c), and the isocyanate group of the compound (c) is reacted with 20 to 85 mol % of hydroxyl groups in the monomer mixture (a).