Patent ID: 7294682

Claim:
A curable silicone resin composition comprising: (A) an aromatic ring-containing hydrocarbon compound containing at least 2 hydrogen atoms bonded to silicon atoms within each molecule, in which said silicon atoms are bonded to the hydrocarbon skeleton of said hydrocarbon compound, (B) an organopolysiloxane with a branched or three dimensional network structure, and with a viscosity at 25° C. of at least 1,000 mPa·s, represented by an average composition formula (1) shown below: R 1 x SiO {(4−x)/2} (1) wherein R 1 groups are either identical or different, and each represent a substituted or unsubstituted monovalent hydrocarbon group, a substituted or unsubstituted hydrocarbyloxy group, or a hydroxyl group, provided from 0.1 to 80 mol % of all said R 1 groups are alkenyl groups, and x represents a positive number that satisfies 1≦x<2, (C) a hydrosilylation reaction catalyst, and (D) an organohydrogenpolysiloxane containing an average of at least 2 hydrogen atoms bonded to silicon atoms within each molecule and with a viscosity at 25° C. of no more than 1,000 mPa·s represented by an average composition formula (4) shown below: R 5 a H b SiO {(4−a−b)/2} (4) wherein R 5 groups are either identical or different, and each represent a substituted or unsubstituted monovalent hydrocarbon group other than an aliphatic unsaturated hydrocarbon group, a represents a positive number that satisfies 0.5≦a≦2.1, and b represents a positive number that satisfies 0.01≦b≦1.0, provided 0.8≦a+b≦2.6, and said organohydrogenpolysiloxane of said component (D) satisfies the following condition: (i) said R 5 groups within said average composition formula (4) include a phenyl group and a ratio of phenyl groups relative to a combination of all R 5 groups and all hydrogen atoms is at least 3 mol %.