ACTIVE-ENERGY-RAY-CURABLE PRESSURE-SENSITIVE ADHESIVE COMPOSITION, PRESSURE-SENSITIVE ADHESIVE, AND PRESSURE-SENSITIVE ADHESIVE SHEET
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Jun 26, 2015
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Jun 30, 2014
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Abstract
An active-energy-ray-curable pressure-sensitive adhesive composition comprising a urethane (meth)acrylate-based compound (A) obtained by reacting a polybutadiene-based polyol (a1), a polyvalent isocyanate-based compound (a2), and a hydroxyl group-containing (meth)acrylate-based compound (a3) and an ethylenically unsaturated monomer (B), wherein storage modulus at 23° C. of a pressure-sensitive adhesive layer obtained by curing the composition by irradiation with an active energy ray is 1.0×106 or more and glass transition temperature of the pressure-sensitive adhesive layer is −30° C. or lower.
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