REFLECTION-PREVENTIVE FILM-FORMING COATING COMPOSITION

摘要

PURPOSE:To provide a reflection-preventive film-forming coating compsn. capable of exhibiting a sufficiently high reflection-preventive effect even for a transparent base material low in refractive index. CONSTITUTION:The compsn. comprises (A) a soln. of an organosiloxane obtd. by hydrolyzing an organosilicon compd. having at least one hydrolyzable group and contg. no arom. group (e.g. tetraethyl silicate) with an acid in an org. solvent, and (B) a dispersion of finely divided silica obtd. by hydrolyzing a tetraalkyl silicate (e.g. tetraethyl silicate) with an alkali in an org. solvent. The compsn. is applied on a transparent material and cured to form a thin coating film having a refractive index of 1.2 to 1.3.