Curable composition including siloxane oligomer and inorganic fine particles

Abstract

There is provided a material having a low refractive index that exhibits a sufficiently low refractive index without deteriorating the strength of the cured film produced therefrom, and that can be cured by an active energy ray that is applicable for a resin base material that is not desired to be exposed to heat. A curable composition comprising: a siloxane oligomer (a) containing a radically polymerizable double bond obtained through hydrolysis and condensation of alkoxysilanes containing at least an alkoxysilane A of Formula [1] and an alkoxysilane B of Formula [2] in an amount of 100 parts by mass; inorganic fine particles (b) in an amount of 10 parts by mass to 1,000 parts by mass; and a polymerization initiator (c) generating a radical upon active energy ray irradiation in an amount of 0.1 parts by mass to 25 parts by mas R1aSi(OR2)4-a  [1] R3bSi(OR4)4-b  [2] a cured film produced from the composition, and a laminate comprising a low refractive index layer produced from the composition.

Dependencies are inferred from the claim text.