Ultraviolet ray curable silicone adhesive composition and cured product thereof

A UV-curable silicone pressure-sensitive adhesive composition comprising:

• (A) 100 parts by weight of an organopolysiloxane containing per molecule two groups having the general formula (1):
• wherein R1 is each independently a C1-C20 monovalent hydrocarbon group, R2 is oxygen or a C1-C20 alkylene group, R3 is each independently an acryloyloxyalkyl, methacryloyloxyalkyl, acryloyloxyalkyloxy or methacryloyloxyalkyloxy group, p is a number of 0 to 10, and “a” is a number of 1 to 3,
• (B) 1 to 200 parts by weight of a monofunctional (meth)acrylate compound free of a siloxane structure,
• (C) 1 to 1,000 parts by weight of an organopolysiloxane resin comprising (a) units having the general formula (2):
• wherein R1, R2, R3, a, and p are as defined above, (b) R43SiO1/2 units wherein R4 is a C1-C10 monovalent hydrocarbon group, and (c) SiO4/2 units, a molar ratio of the total of units (a) and (b) to units (c) being in the range of from 0.4:1 to 1.2:1, and
• (D) 0.01 to 20 parts by weight of a photopolymerization initiator,
• the composition being free of a non-crosslinkable organopolysiloxane resin, wherein the monofunctional (meth)acrylate compound free of a siloxane structure (B) is at least one of isoamyl acrylate, lauryl acrylate, stearyl acrylate, ethoxy-diethylene glycol acrylate, methoxy-triethylene glycol acrylate, 2-ethylhexyl diglycol acrylate, phenoxyethyl acrylate, phenoxydiethylene glycol acrylate, tetrahydrofurfuryl acrylate, and isobornyl acrylate.