| 摘要 |
An ultraviolet-curable silicone resin composition including (A) a polyorganosiloxane having a mercaptoalkyl bonded to a silicon atom and having a viscosity at 23° C. of 20 to 25000 cP; (B) an organopolysiloxane having aliphatic unsaturated groups which includes (B1) a linear polyorganosiloxane having aliphatic unsaturated, and (B2) a branched organopolysiloxane which includes an SiO4/2 unit, an R′3SiO1/2 unit and an R′2SiO2/2 unit, and at least three of R′per one molecule are aliphatic unsaturated groups, provided that an amount of (B2) is an amount where a number of the aliphatic unsaturated groups in (B2) based on a total number of the aliphatic unsaturated groups in (B) is 50% or less; (C) a photoinitiator; and (D) a silane compound having an aliphatic unsaturated group.
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