| abstract |
The present invention relates to an isocyanurate ring-containing terminal vinyl polysiloxane, It is an organosiloxane which has one or more isocyanuric rings in the molecule | numerator represented by following formula (1), and has a vinyl siloxy group at the both ends, and provides the hardened | cured material which utilized the characteristic of hydrosiliation (addition reaction). It is possible to provide an isocyanurate ring-containing organopolysiloxane suitably used for sealing materials for optical semiconductors and the like. (Formula 1) (In the above formula 1, X is a monovalent organic group that does not contain an unsaturated bond independently of each other, R 1 , R 2 are each independently a methyl group or a phenyl group, P is an integer of 1 to 30) |