| abstract |
(A) Average unit formula: (R 1 3 SiO 1/2 ) a (R 2 2 SiO 2/2 ) b (R 3 SiO 3/2 ) c (R 1 is an alkyl group, an alkenyl group, an aryl group, or An aralkyl group, R 2 is an alkyl group or an alkenyl group, R 3 is an alkyl group, an aryl group, or an aralkyl group, provided that at least 0.5 mol% of R 1 to R 3 in one molecule is an alkenyl group, R 3 At least one is an aryl group or an aralkyl group, a number satisfying 0.01 ≦ a ≦ 0.5, 0.4 ≦ b ≦ 0.8, 0.01 ≦ c ≦ 0.5, and a + b + c = 1). (B) an organopolysiloxane different from the component (A), (C) an organopolysiloxane having at least two silicon-bonded hydrogen atoms in one molecule, and (D) a hydrosilica Curable silicone composition comprising a reaction catalyst. A cured product having good dispersibility of the phosphor, high strength and gas barrier properties is formed. |