| 简介 |
PROBLEM TO BE SOLVED : To obtain a silicone-based pressure-sensitive adhesive composition for forming a pressure-sensitive adhesive layer having extremely low migration in which a silicone component is not visually observed on an adherend during a re-release even in the case of a high-temperature treatment of ≥250°C and a pressure-sensitive adhesive tape using the same.
SOLUTION : The silicone-based pressure-sensitive adhesive composition comprises (A) a condensation reaction product obtained by reacting (a) a diorganopolysiloxane containing silanol groups at both molecular chain terminals and two or more alkenyl groups bonded to silicon atoms at the side chain and having a high polymerization degree with (b) an organopolysiloxane resin containing one or more hydrolyzable groups in one molecule and essentially composed of an M unit and a Q unit in the presence of (c) a condensation catalyst, (B) an organohydrogenpolysiloxane, (C) a diorganopolysiloxane containing alkenyl groups bonded to silicon atoms at both molecular chain terminals, (D) an organopolysiloxane resin essentially composed of an M unit and a Q unit and (E) a platinum-based catalyst.
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