SILANOL CONDENSATION CATALYST, THERMOSETTING SILICONE RESIN COMPOSITION FOR OPTICAL SEMICONDUCTOR SEALING USE, AND SEALING BODY USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a thermosetting silicone resin composition for optical semiconductor sealing use having excellent heat resistance and thin film curability.

SOLUTION: A silanol condensation catalyst contains at least an organohafnium compound represented by formula (1) and/or formula (2) in (C). The thermosetting silicone resin composition for optical semiconductor sealing use contains: (A) 100 pts.mass of an organopolysiloxane having two or more silanol groups per molecule; (B) 0.1-2000 pts.mass of a silane compound having two or more alkoxy groups per molecule; and (C) the organohafnium compound. A sealing body using the thermosetting silicone resin composition is also provided. In the formula (1), n is an integer of 1-4, R1is a hydrocarbon group, and R2is a 1-18C alkyl group. In the formula (2), m is an integer of 1-4, R2is a 1-18C alkyl group, and R3and R4are each a 1-18C hydrocarbon group or alkoxy group and are the same as or different from each other.

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