| 摘要 |
<p>A pressure-sensitive adhesive composition including: a (meth)acrylate copolymer (A) obtained by copolymerizing a (meth)acrylate and a reactive group-containing monomer, such that a ratio of the reactive group-containing monomer (constituent unit derived from the monomer) in the copolymer ranges from 0.01 to 15 wt%; a polyrotaxane (B) having at least two cyclic molecules and a linear-chain molecule passing through opening portions of the cyclic molecules wherein the cyclic molecules have each one or more reactive groups and the linear-chain molecule has blocking groups at both ends thereof; and a crosslinking agent (C) having a reactive group capable of reacting with the reactive group of the (meth)acrylate copolymer (A) and with the reactive group of the polyrotaxane (B), wherein an equivalent ratio of the reactive group of the crosslinking agent (C) with respect to the reactive group of the (meth)acrylate copolymer (A) ranges from 0.001 to 2, and an equivalent ratio of the reactive group of the crosslinking agent (C) with respect to the reactive group of the polyrotaxane (B) ranges from 0.1 to 5. When used in an optical member such as a polarizing plate or a retardation plate, such a pressure-sensitive adhesive composition allows forming a pressure-sensitive adhesive layer excellent in light leakage prevention ability, while satisfying sufficient durability and optical characteristics, such as total light transmittance.</p> |
