| 摘要 |
PROBLEM TO BE SOLVED: To provide encapsulation material of an optical semiconductor device, which has a long life and is excellent in mass productivity, and to provide a composition which can provide such an encapsulation material and has an appropriate viscosity.SOLUTION: A composition for resin is provided which contains the following components (A) to (C): (A) a (meth)acrylate compound prepared by ester-bonding an alicyclic hydrocarbon group having 6 or more carbon atoms; (B) an aliphatic urethane (meta)acrylate compound; and (C) a thermal radical polymerization initiator. When the total of the components (A) and (B) is 100 mass%, the (A) component is 10 to 60 mass%, and the (B) component is 40 to 90 mass%. |
