| 摘要 |
PROBLEM TO BE SOLVED: To provide: organopolysiloxane which has high refractive index and is monodisperse and forms a cured product having moderate elastic modulus when cured; and a method of producing the organopolysiloxane.SOLUTION: There is provided the organopolysiloxane represented by the average unit formula:(RRSiO)(RSiO)(XO), (in the formula, Ris an alkyl group having 1 to 12 carbon atoms, an alkenyl group having 2 to 12 carbon atoms, or a phenyl group, Ris an alkyl group having 1 to 12 carbon atoms, an alkenyl group having 2 to 12 carbon atoms, a phenyl group or an epoxy group-containing organic group, provided that at least one Ris the epoxy group-containing organic group in a molecule, Ris a condensed polycyclic aromatic group or a condensed polycyclic aromatic group-containing organic group, X is an alkyl group having 1 to 3 carbon atoms or a hydrogen atom, a is the number of 0.20 to 0.60, b is the number of 0.40 to 0.80 and the sum of a and b is 1.00 and c is the number of 0 to 0.5). |
