| 摘要 |
<p>PURPOSE: An acrylic copolymer is provided to have excellent thermal resistance, and to have extremely low in-plane phase difference in a thickness direction, thereby being used for a polarizer protection film. CONSTITUTION: An acrylic copolymer comprises one or more selected from 50-86 parts by weight of alkyl (meth)acrylate unit, 1-20 parts by weight of 2-phenoxyethyl (meth)acrylate unit, and 13-30 parts by weight of (meth)acrylic acid unit. The alkyl (meth)acrylate unit with 1-10 carbons. An optical film comprises an acrylic copolymer. The optical film has an in-plane phase difference of 0-10 nm, and a phase difference in a thickness direction is (-10)-10 nm.</p> |
