Patent ID: 9093625
Filing Date: 2015-07-28
Classification: C08G,C08L,C09J,H01L

Abstract:
1. A curable composition for encapsulating an optical semiconductor which comprises (A) 100 parts by mass of a linear polyfluoro compound represented by the following formula (1), and R 1 represents a hydrogen atom, or an unsubstituted or substituted monovalent hydrocarbon group; X′ is a group represented by any one of —CH and R 1 represents the same group as mentioned above; “a” represents independently 0 or 1; Rf wherein “u” represents an integer of 1 to 300; “s” represents an integer of 1 to 80; and “t” has the same meaning as defined above, (B) a cyclic organopolysiloxane represented by the following formula (6), having a hydrogen atom directly bonded to a silicon atom, and a monovalent perfluoroalkyl group or a monovalent perfluorooxyalkyl group each bonded to a silicon atom through a divalent hydrocarbon group which may contain an oxygen atom or a nitrogen atom in the molecule, and/or an organo hydrogen siloxane represented by the following formula (36), having a hydrogen atom directly bonded to a silicon atom, and a monovalent perfluoroalkyl group or a monovalent perfluorooxyalkyl group each bonded to a silicon atom through a divalent hydrocarbon group which may contain an oxygen atom or a nitrogen atom in the molecule, (C) 0.1 to 500 ppm of a platinum group metal catalyst in terms of a platinum group metal atom, (D) 0.10 to 10.0 parts by mass of a cyclic organopolysiloxane represented by the following formula (7), having a hydrogen atom directly bonded to a silicon atom, a monovalent perfluoroalkyl group or a monovalent perfluorooxyalkyl group each bonded to a silicon atom through a divalent hydrocarbon group which may contain an oxygen atom or a nitrogen atom, and an epoxy group bonded to a silicon atom through a divalent hydrocarbon group which may contain an oxygen atom in the molecule, D represents a monovalent perfluoroalkyl group or a monovalent perfluorooxyalkyl group each bonded to a silicon atom through a divalent hydrocarbon group which may contain an oxygen atom or a nitrogen atom; and E represents an epoxy group bonded to a silicon atom through a divalent hydrocarbon group which may contain an oxygen atom, and (E) 0.10 to 70.0 parts by mass of a cyclic organopolysiloxane represented by the following formula (8), having a monovalent unsaturated hydrocarbon group directly bonded to a silicon atom, and a monovalent perfluoroalkyl group or a monovalent perfluorooxyalkyl group each bonded to a silicon atom through a divalent hydrocarbon group which may contain an oxygen atom or a nitrogen atom in the molecule,