| abstract |
A silicone-based sealant composition containing (A) a bifunctional thermosetting silicone resin, (B) a multifunctional thermosetting silicone resin having a hydroxyl group, and (C) a curing catalyst, wherein: the weight-average molecular weight of component (A) is 300-4,500; the proportion by mass of component (B) relative to the total mass of component (A) and component (B) is at least 0.5 mass% and less than 100 mass%; the average functional group number of component (B) is 2.5-3.5; as a repeating unit constituting component (B), at least 50 mass% of the total mass of component (B) is trifunctional; and the visible light transmittance measured at a wavelength of 600nm and an optical path length of 1cm is 70% or higher. |