Patent ID: 7705104

Claim:
An addition curable silicone resin composition for a light emitting diode, comprising: (A) an organopolysiloxane comprising: a straight-chain segment represented by a general formula (1): —(R 1 2 SiO) n — (1) wherein R 1 represents an unsubstituted or substituted monovalent hydrocarbon group that contains no unsaturated aliphatic bonds, and n represents an integer of from 7 to 100), and a resin-like segment, consisting of M units represented by a general formula: R 2 3 SiO 1/2 wherein R 2 represents an unsubstituted or substituted monovalent hydrocarbon group, an alkoxy group, or a hydroxyl group, and at least one member of Q units represented by a formula: SiO 2 , and T units represented by a formula: R 2 SiO 3/2 wherein R 2 is as defined above, in which at least two of all said R 2 groups are alkenyl groups, wherein, in said component (A), said straight-chain segment and said resin-like segment exist within a single molecule and form a single organopolysiloxane molecule, (B) an organohydrogenpolysiloxane represented by an average composition formula (4): R 3 a H b SiO (4-a-b)/2 (4) wherein, each R 3 represents, independently, an unsubstituted or substituted monovalent hydrocarbon group that contains no alkenyl groups, at least 30 mol % of all R 3 groups are methyl groups, a is a number that satisfies 0.7≦a≦2.1, b is a number that satisfies 0.001≦b≦1.0, and a+b represents a number that satisfies 0.8≦a+b≦3.0, and contains at least two hydrogen atoms bonded to silicon atoms within each molecule, in sufficient quantity that a ratio of silicon atom-bonded hydrogen atoms within said component (B) relative to all silicon atom-bonded alkenyl groups within said component (A) is within a range from 0.5 to 4.0, (C) an effective quantity of an addition reaction catalyst, and (D) an organohydrogenpolysiloxane compound containing at least one of an epoxy group and an alkoxy group, in sufficient quantity to provide from 0 to 30 parts by mass per 100 parts by mass of a combination of said component (A) and said component (B).