- - CURABLE SILICONE COMPOSITION FOR SEALING AN OPTICAL SEMICONDUCTOR ELEMENT METHOD OF PRODUCING A RESIN-SEALED OPTICAL SEMICONDUCTOR ELEMENT AND RESIN-SEALED OPTICAL SEMICONDUCTOR ELEMENT

摘要

(A) having two or more silicon-bonded vinyl groups in one molecule and having C_1-10Alkyl /RTI _4/2An organopolysiloxane lacking a siloxane unit represented by the formula (B) an organopolysiloxane represented by an average unit formula; (C) having three or more silicon-bonded hydrogen atoms in one molecule and having C_1-10Organopolysiloxanes having alkyl and containing from 0.7 to 1.6 mass% of silicon-bonded hydrogen atoms; And (D) a hydrosilylation reaction catalyst, wherein the viscosity of said composition lacking component (D) at 25C and viscosity at 100C is in a specific relationship Can provide a cured product capable of efficiently performing resin sealing by transfer molding or compression molding while exhibiting excellent moldability and having low surface tackiness.;