LOW REFRACTIVE INDEX COMPOSITION

摘要

A low refractive index composition is provided comprising the reaction product of: (i) a cross-linkable polymer; (ii) a multiolefinic crosslinker; and (iii) a plurality of solid nanosilica particles; (iv) a plurality of porous nanosilica particles; (v) an oxysilane having at least one polymerizable functional group and at least one of a hydrolysis and condensation product of said oxysilane; and (vi) a free radical polymerization initiator; wherein the volume percent of the solid nanosilica particles is greater than 0 and less than or equal to about 20; the sum of the volume percent of the solid nanosilica particles and the volume percent of the porous nanosilica particles is less than or equal to about 45; and wherein volume percent is based on the sum of the dry volumes of the cross-linkable polymer, the multiolefinic crosslinker, the solid nanosilica particles and the porous nanosilica particles. Further provided is a liquid mixture for forming a low refractive index coating, an article comprising a substrate having an anti-reflective coating, and a method for forming an anti-reflective coating on a substrate.