多面体構造ポリシロキサン変性体、該変性体を含有する組成物、該組成物を用いてなる封止剤、および光学デバイス

摘要

A modified polyhedral polysiloxane obtained by hydrosilylation of an alkenyl group-containing polyhedral polysiloxane compound (a), a hydrosilyl group-containing compound (b), and a cyclic olefin compound (c) having one carbon-carbon double bond in its molecule.