POLYHEDRAL STRUCTURE POLYSILOXANE DENATURED BODY, COMPOSITION INCLUDING THE DENATURED BODY, AND CURED PRODUCT OBTAINED BY CURING THE COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide a polysiloxane-based composition having high heat resistance and light resistance, excellent in gas barrier properties and thermal shock resistance, and good in handleability when sealing an optical semiconductor element.;SOLUTION: This polysiloxane-based composition includes: (A) a polyhedral structure polysiloxane denatured body obtained by hydrosilylation reaction of an alkenyl group-containing polyhedral structure polysiloxane-based compound (a), a hydrosilyl group-containing compound (b), and an organosilicon compound (c) having one alkenyl group in one molecule; and (B) a compound having two or more alkenyl groups.;COPYRIGHT: (C)2013,JPO&INPIT