Addition curing type silicone resin composition

An addition curing type silicone resin composition comprising:

• (A) 100 parts by weight of an organopolysiloxane represented by an average composition formula (1):
• R1aR2bR3cSiO(4−a−b−c)/2 (1)
• wherein, R1 represents a phenyl group, R2 represents an alkenyl group of 2 to 10 carbon atoms, R3 represents a monovalent group selected from the group consisting of monovalent hydrocarbon groups except a phenyl group and alkenyl groups, a hydroxyl group and alkoxy groups, and a, b and c are positive numbers which satisfy requirements 0.5≦a≦1.0, 0.2≦b≦0.5, 0.2≦c≦0.8 and 1.0<a+b+c<2.0, which incorporates a phenyl group and at least two alkenyl groups within a single molecule, and in which a combined proportion of Si atoms within ≡Si-R2 groups and RSiO3/2 units wherein, R represents either one of R1 and R3 as defined above relative to total Si atoms is at least 70 mol %;
• (B) 1 to 100 parts by weight of an organohydrogenpolysiloxane represented by an average composition formula (2):
• R4dHeR5fSiO(4−d−e−f)/2 (2)
• wherein, R4 represents a phenyl group, R5 represents a monovalent group selected from the group consisting of monovalent hydrocarbon groups except a phenyl group, a hydroxyl group and alkoxy groups, and d, e and f are positive numbers which satisfy requirements 0.4≦d≦1.0, 0.5≦0.8, 0.7≦f≦1.2 and 1.8<d+e+f<3.0, which incorporates a phenyl group and at least two SiH groups within a single molecule;
• and
• (C) an effective quantity of a hydrosilylation reaction catalyst.