Patent ID: 9056985
Filing Date: 2015-06-16
Classification: C08G,C08L,H01L

Abstract:
1. A curable composition, comprising: (A) a mixture of a first crosslinked polyorganosiloxane including a siloxane unit of Formula A and a siloxane unit of Formula B, having a ratio (B/(A+B)) of a molar ratio (B) of the siloxane unit of Formula B to a molar ratio (A+B) of the sum of the siloxane units of Formulas A and B of 0.1 to 0.35, and having a molar ratio (Ar/Si) of an aryl (Ar) group to a silicon (Si) atom of 0.3 or less, and a second crosslinked polyorganosiloxane including a siloxane unit of Formula A and a siloxane unit of Formula B, having a ratio (B/(A+B)) of a molar ratio (B) of the siloxane unit of Formula B to a molar ratio (A+B) of the sum of the siloxane units of Formulas A and B, which is different from that of the first crosslinked polyorganosiloxane, of 0.2 to less than 1, and having a molar ratio (Ar/Si) of an aryl (Ar) group to a silicon (Si) atom of 0.3 or less; and (B) a polyorganosiloxane including a hydrogen atom and an aryl group, which bind to a silicon atom, having a molar ratio of an aryl (Ar) group to a silicon (Si) atom of 0.25 or more, and having 3 to 10 silicon atoms: where R