ADDITION-CURABLE SILICONE COMPOSITION AND OPTICAL DEVICE

摘要

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.;

主权项

1. An addition-curable silicone composition comprising:
(A) a linear organopolysiloxane having two or more silicon atom-bonded aliphatic unsaturated groups and one or more silicon atom-bonded CF3—(CF2)y—(CH2)z— groups in one molecule (“y” represents an integer of 0 or more and “z” represents an integer of 1 or more), wherein the amount is 100 parts by mass; (B) an organopolysiloxane having two or more silicon atom-bonded aliphatic unsaturated groups and one or more silicon atom-bonded CF3—(CF2)y—(CH2)z— groups in one molecule, and having either or both of siloxane units represented by SiO4/2 and RSiO3/2 as a branched structure (“y” represents an integer of 0 or more, “z” represents an integer of 1 or more, and R represents a substituted or unsubstituted monovalent hydrocarbon group), wherein the amount is 1 to 100 parts by mass; (C) an organosilicon compound represented by the following general formula (1), wherein the amount is such an amount that the molar ratio of the SiH group in the component (C) to the total aliphatic unsaturated group in the components (A) and (B) satisfies 0.2≦SiH group/aliphatic unsaturated group≦5.0, wherein R1 represents a hydrogen atom or the same or different substituted or unsubstituted monovalent organic group having 1 to 10 carbon atoms, “x” represents an integer of 0 or more, “w”, “p”, and “q” satisfy 1≦w≦2, 0