| 摘要 |
An acrylic pressure-sensitive adhesive which gives a pressure-sensitive adhesive layer having a regulate refractive index, in particular, an increased refractive index, and retaining almost intact satisfactory pressure-sensitive adhesive properties. The pressure-sensitive adhesive comprises an acrylic copolymer comprising, as copolymerizable components, an acrylic alkyl ester containing no aromatic ring and a monomer containing an aromatic ring, copolymerization proportion of the monomer containing an aromatic ring in the copolymer being from 40 to 90% by weight based on the weight of all monomer components.
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