LOW-REFRACTIVE INDEX COATING MATERIAL AND ANTIREFLECTION FILM

摘要

PROBLEM TO BE SOLVED: To provide a single layer antireflection film of a low-refractive index, excellent in abrasion resistance and an antifouling property with a fingerprint, etc. SOLUTION: The low-refractive index coating material and the antireflection film are characterized by comprising a copolymer of a composition A composed either of an organosilicon compound represented by Si(OR)4 (R is a linear or branched alkyl) or a polymer of the compound and a composition B composed either of a perfluoropolyether group-containing silicon compound represented by Rf-(OC3 F6 )n -O-(CF2 )m -(CH2 )l -O-(CH2 )s -Si(OR)3 (Rf is a 1-16C linear or branched perfluoroalkyl; n is an integer of 1-50; m is an integer of 0-3; l is an integer of 0-3 and satisfies 6>=m+l>0; s is an integer of 0-6; and R is an linear or branched alkyl) or a polymer of the compound.