| abstract |
It is an object of the invention to provide a curable silicone resin composition which is intended to form a material (sealing material, lens, or the like) excellent in sulfur barrier, while preserving thermal shock resistance. More specifically, the invention provides a curable silicone resin composition which contains the following components (A), (B), (C) and (D). (A): polysiloxane having at least two alkenyl groups and at least one aryl group within each molecule; (B): polyorganosiloxane having at least one hydrosilyl group within each molecule, and free of aliphatic unsaturated group; (C): isocyanurate compound represented by formula (1); (D): branched chain polyorganosiloxane having at least one alkenyl group within each molecule [in the formulas, each of the symbols of each formula is as defined in the description] |