Patent ID: 8007878

Claim:
An antireflection film comprising a support and a low refractive index layer prepared by coating a coating composition containing the following components: (A) a fluorine-containing polymer having, a principal chain which is made of only carbon atoms and the fluorine-containing polymer contains at least one fluorine-containing vinyl monomer polymerization unit and at least one hydroxyl group-containing vinyl monomer polymerization unit, wherein a content of the hydroxyl group-containing vinyl monomer polymerization unit exceeds 20% by mole, provided that the polymer does not have a polysiloxane structure in the principal chain; (B) a crosslinking agent that reacts with a hydroxyl group; and (C) a compound containing two or more (meth)acryloyl groups in one molecule thereof, wherein the fluorine-containing polymer contains at least one polymerization unit having a graft site containing, in a side chain thereof, a polysiloxane repeating unit represented by the following formula (1): wherein R 1 and R 2 may be the same or different and each represents an alkyl group or an aryl group; and p represents an integer of from 10 to 500; and wherein the coating composition further contains at least one salt comprising an organic base having a pKa of from 5.0 to 10.5 in terms of a conjugated acid thereof and an acid.