| 摘要 |
PROBLEM TO BE SOLVED: To provide an acrylic pressure-sensitive adhesive composition that is an ultraviolet-curable pressure-sensitive adhesive composition substantially free from any solvent and has high adhesive strength to polycarbonate even under high temperature and high humidity conditions. SOLUTION: The acrylic pressure-sensitive adhesive composition comprises (a) a vinyl monomer mainly composed of (a1) an alkyl (meth)acrylate having a 2-14C alkyl group or a partially polymerized product thereof, (b) a photopolymerization initiator, (c) a (meth)acrylic ester oligomer having a softening temperature Ts of 40°C or higher and a weight average molecular weight of 1,000-30,000 and (d) a multifunctional (meth)acrylate wherein the acrylic pressure-sensitive adhesive composition is adjusted such that its gel percentage attains 45 % or more by irradiating with ultraviolet rays. COPYRIGHT: (C)2005,JPO&NCIPI
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