Compound including organopolysiloxane or silsesquioxane skeleton having isocyanuric skeleton, epoxy group and sih group, thermosetting resin composition containing the compound as adhesion-imparting agent, hardened material and sealing agent for optical semiconductor

Abstract

The invention provides an adhesion-imparting agent having heat-resistant transparency and a high refractive index best suited for an addition hardening type composition including a reaction product of silsesquioxane and organopolysiloxane. The invention relates to a compound obtained by allowing a hydrosilylation addition reaction of (A), (B), and when necessary, (C) as described below, and a compound including an organopolysiloxane or silsesquioxane skeleton including as an essential component an isocyanuric ring skeleton and an epoxy group, and having an SiH group residue: (A) a compound including an organopolysiloxane or silsesquioxane skeleton and having three or more SiH groups in one molecule; (B) an epoxy derivative having one aliphatic unsaturated group in one molecule; and (C) organopolysiloxane having two alkenyl groups in one molecule, and having a number average molecular weight of 100 to 500,000, or an isocyanurate compound having two alkenyl groups in one molecule.