Addition-curable silicone composition and optical device

Abstract

The present invention provides an addition-curable silicone composition comprising: (A) a linear organopolysiloxane having silicon atom-bonded aliphatic unsaturated groups and CF3—(CF2)y—(CH2)z— groups; (B) an organopolysiloxane having silicon atom-bonded aliphatic unsaturated groups and CF3—(CF2)y—(CH2)z— groups, and having a branched structure represented by SiO4 / 2 and RSiO3 / 2; (C) an organosilicon compound having silicon atom-bonded hydrogen atoms and represented by the following general formula (1); and (D) a platinum group metal-based catalyst. There can be provided an addition-curable silicone composition that provides a cured product having low refractive index, high transparency, excellent light extraction efficiency, good rubber properties and strength properties, and no tack after curing, and in particular, has good transmittance of light with a wavelength of 400 nm at 25° C.

Description

technical field

[0001] The invention relates to an addition curing silicone composition and an optical element, in particular to an addition curing silicone composition and an optical element sealed with the cured product of the composition. The type silicone composition can provide a cured product having good gum properties and strength properties, a low refractive index, and excellent product reliability without adhesiveness after curing. Background technique

[0002] Addition-curable silicone composition, comprising organopolysiloxane containing aliphatic unsaturated groups such as alkenyl groups and organopolysiloxanes containing hydrogen atoms bonded to silicon atoms (that is, SiH groups) (organohydrogen Polysiloxane) can be cured by a hydrosilylation reaction to provide a cured product. The cured product obtained in this way is excellent in heat resistance, cold resistance, and electrical insulation, and is transparent, so it is used as a sealing material for various ...

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