Curable reactive silicone composition, cured product thereof and uses of composition and cured product

A curing reactive silicone composition, comprising:

• (A) an organopolysiloxane resin containing in a molecule a siloxane unit as expressed by R3SiO1/2, where each R mutually independently represent a monovalent organic group, and a siloxane unit as expressed by SiO4/2;
• (B) a straight chain or branched organopolysiloxane having at least two groups containing an aliphatic unsaturated carbon-carbon bond in one molecule and a degree of siloxane polymerization within a range of 150 to 1,500;
• (C) an organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms in one molecule and having a viscosity at 25° C. in the range of 5 to 500 mPa·s;
• and
• (D) a hydrosilylation reaction catalyst that does not exhibit activity without irradiating with a high energy beam, but exhibits activity in a composition by irradiating a high energy beam;
• wherein;
• the amount of component (A) is 60 mass % to 85 mass % of the total mass of component (A) to component (C),
• the amount of component (C) is an amount such that the silicon-bonded hydrogen atoms in component (C) is 0.5 to 2 mols relative to one mol of the total aliphatic unsaturated carbon-carbon bonds in the composition,
• the composition is non-fluid at 25° C.,
• heat meltability is provided,
• the melt viscosity at 100° C. is 100,000 Pa·s or less, and
• in a state before a curing reaction, a test piece in which a curable layer with a thickness of 200 μm containing a curing reactive silicone composition is formed between two glass plates is used, and the shear adhesive strength of the curable layer is 0.4 MPa or more, as measured by a method specified in JIS K 6850.