Patent ID: 8519429
Filing Date: 2013-08-27
Classification: C08G,C08L,C09K,H01L

Abstract:
1. A sealant for an optical semiconductor device for use in an optical semiconductor device, comprising a first organopolysiloxane not containing a hydrogen atom bound to a silicon atom, but containing an alkenyl group bound to a silicon atom and an aryl group bound to a silicon atom, a second organopolysiloxane containing a hydrogen atom bound to a silicon atom and an aryl group bound to a silicon atom, and a platinum-alkenyl complex, wherein the platinum-alkenyl complex is obtainable by reacting chloroplatinic acid hexahydrate with not less than 6 equivalent of a bi- or higher-functional alkenyl compound, and the ratio of the number of the alkenyl group bound to a silicon atom in the organopolysiloxane to the number of the hydrogen atom bound to a silicon atom in the organopolysiloxane in the sealant is not less than 1.0 and not more than 2.5.