ADDITION-CURE-TYPE SILICONE COMPOSITION, SEALING MATERIAL FOR OPTICAL ELEMENTS, AND OPTICAL ELEMENT

摘要

PROBLEM TO BE SOLVED: To provide: an addition-cure-type silicone composition which provides a cured material having a high refractive index, high transparency and high temperature cycle resistance; a sealing material for optical elements; and an optical element sealed with the sealing material for optical elements.SOLUTION: The present invention provides an addition-cure-type silicone composition characterized by comprising: A) a three-dimensional net-shaped organopolysiloxane which has at least one alkenyl group and at least one aryl group per molecule, also has siloxane units represented by general formulas RSiO and SiO(where R represents an organic group) and does not have a unit represented by general formula RSiO; B) a linear organopolysiloxane which has at least two alkenyl groups and at least one aryl group per molecule; C) an organosilicon compound which has hydrogen atoms bound to at least two silicon atoms per molecule and does not have an alkenyl group; and D) a hydrosilylation catalyst containing a platinum-group metal.